CN219843009U

CN219843009U - Battery cell, battery pack and electricity utilization device

Info

Publication number: CN219843009U
Application number: CN202321126329.3U
Authority: CN
Inventors: 罗为平; 侯进强; 张达; 郭冠南
Original assignee: Chuzhou Fudi Battery Co ltd; BYD Co Ltd
Current assignee: Chuzhou Fudi Battery Co ltd; BYD Co Ltd
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-10-17
Anticipated expiration: 2033-05-09

Abstract

The utility model discloses a battery cell, a battery pack and an electricity utilization device, wherein the battery cell comprises: the shell is of a triangular prism column structure; the pole core is arranged in the shell, and at least one end of the pole core is provided with a pole lug; the cross section of the space ring assembly is of a triangular structure and is matched with the shell structure, the space ring assembly is arranged at least one end of the pole core, the space ring assembly is provided with a channel, and the pole lugs penetrate through the channel to draw out current. So, the casing is triangular prism column structure, designs the spacer ring subassembly of its inside casing into triangle-shaped structure, can improve the inside space utilization of casing to the utmost point ear of utmost point core is passed the passageway of spacer ring subassembly and is in order to draw forth the electric current, makes the whole inner structure of electric core and the triangular prism structure of casing carry out fine adaptation.

Description

Battery cell, battery pack and electricity utilization device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cell, a battery pack and an electric device.

Background

At present, in order to meet the requirements of new energy automobiles and batteries, square batteries and cylindrical batteries are proposed, and triangular prism batteries are also proposed in related technologies, but the internal structure of the triangular prism batteries is complex, and the installation and the production are inconvenient.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the battery cell, the shell of the battery cell is of a triangular prism structure, the cross section of the space ring assembly is correspondingly provided with a triangular structure so as to be matched with the shell, and the lugs of the pole core penetrate through the channels of the space ring assembly to be connected with the outside of the shell, so that the battery cell is simple in structure and beneficial to installation.

The utility model further provides a battery pack.

The utility model further provides an electric device.

According to an embodiment of the first aspect of the present utility model, a battery cell includes: the shell is of a triangular prism column structure; the pole core is arranged in the shell, and at least one end of the pole core is provided with a pole lug; the cross section of the space ring assembly is of a triangular structure and is matched with the shell structure, the space ring assembly is arranged at least one end of the pole core, the space ring assembly is provided with a channel, and the pole lugs penetrate through the channel to draw out current.

According to the battery cell provided by the embodiment of the utility model, the shell of the battery cell is of the triangular prism column structure, the space utilization rate in the shell can be improved by designing the space ring assembly in the shell into the triangular structure, and the lugs of the pole core penetrate through the channels of the space ring assembly to lead out current, so that the internal structure of the battery cell is matched with the structure of the shell.

According to some embodiments of the utility model, the spacer assembly comprises: the first side spacer ring and the second side spacer ring are of triangular structures, and the first side spacer ring and the second side spacer ring are spliced relatively to form the spacer ring assembly with the triangular cross section.

According to some embodiments of the utility model, the first side spacer is provided with a first avoiding portion, the second side spacer is provided with a second avoiding portion, and the first avoiding portion and the second avoiding portion cooperate to define the channel.

According to some embodiments of the utility model, a receiving groove is formed in one side, facing the pole core, of the first side spacer ring or the second side spacer ring, an opening is formed in one side, adjacent to the channel, of the receiving groove, and the receiving groove is used for converging the pole lugs of the pole core and enabling the pole lugs of the pole core to penetrate out of the opening to the channel.

According to some embodiments of the utility model, at least one of the first side spacer and the second side spacer is provided with a through hole to define the channel.

According to some embodiments of the utility model, the first side spacer is provided with a first mounting portion, and the second side spacer is provided with a second mounting portion, and the first mounting portion is detachably connected with the second mounting portion.

According to some embodiments of the utility model, the first side spacer is provided with a third mounting portion and the second side spacer is provided with a fourth mounting portion; the first mounting portion disposed on the first side spacer corresponds in position to the second mounting portion disposed on the second side spacer, and the third mounting portion disposed on the first side spacer corresponds in position to the fourth mounting portion disposed on the second side spacer.

According to some embodiments of the utility model, the second side spacer and the first side spacer cooperate to define an accommodating space for the tab, and the accommodating space is disposed towards one side of the second side spacer and the first side spacer away from the pole core, so as to accommodate the tab after bending.

According to some embodiments of the utility model, at least one liquid injection channel penetrating along the thickness direction of the first side spacer ring and the second side spacer ring is respectively arranged on the first side spacer ring and the second side spacer ring, and the liquid injection channel and the pole core are oppositely arranged.

According to some embodiments of the utility model, further comprising: the leading-out sheet is arranged on one side, deviating from the pole core, of the spacer ring assembly, and the pole lug of the pole core penetrates out of the channel to be connected with the leading-out sheet.

According to some embodiments of the utility model, further comprising: the cross section of the cover plate component is of a triangular structure and is matched with the shell structure, and the cover plate component is arranged on the shell in a covering mode and closes the opening of the shell.

According to some embodiments of the utility model, the cover plate assembly comprises: the pole is electrically connected with the pole lug, and the liquid injection port is communicated with the inside of the shell.

A battery pack according to an embodiment of the second aspect of the present utility model includes: the battery cell.

According to some embodiments of the utility model, the battery pack includes: the battery cells are stacked, two adjacent battery cells are mutually attached and connected through adjacent side surfaces, and two adjacent battery cells are electrically connected through the connecting sheets at the end surfaces.

An electrical device according to an embodiment of the third aspect of the present utility model includes: the battery pack

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a front view of a cell according to an embodiment of the present utility model;

fig. 2 is a side view of a cell according to an embodiment of the utility model;

fig. 3 is a top view of a cell according to an embodiment of the utility model;

fig. 4 is a cross-sectional view of a cell according to an embodiment of the present utility model;

fig. 5 is an exploded view of a cell according to an embodiment of the present utility model;

fig. 6 is an enlarged view of a portion of a cell according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a first perspective of a spacer assembly according to an embodiment of the present utility model;

fig. 8 is an enlarged view at a in fig. 7;

FIG. 9 is a schematic structural view of a second view of a spacer ring assembly according to an embodiment of the present utility model;

FIG. 10 is a schematic structural view of a third perspective of a spacer ring assembly according to an embodiment of the present utility model;

fig. 11 is an enlarged view at B in fig. 10;

FIG. 12 is an exploded view of a first perspective of a spacer ring assembly according to an embodiment of the present utility model;

FIG. 13 is an exploded view of a second perspective of a spacer ring assembly according to an embodiment of the present utility model;

FIG. 14 is an exploded view of a third perspective of a spacer ring assembly according to an embodiment of the present utility model;

FIG. 15 is a schematic view of a first side spacer/second side spacer configuration according to an embodiment of the present utility model;

fig. 16 is an enlarged view at C in fig. 15;

fig. 17 is an enlarged view of D in fig. 15;

FIG. 18 is a schematic illustration of an assembly of a spacer ring assembly, tabs and tabs according to an embodiment of the present utility model;

FIG. 19 is a sectional view E-E of FIG. 18;

FIG. 20 is a second schematic view of an assembly of a spacer ring assembly, tabs and tabs according to an embodiment of the present utility model;

fig. 21 is a schematic structural view of a battery pack according to an embodiment of the present utility model.

Reference numerals:

100. a battery cell;

1. a housing;

2. a pole core; 21. a tab;

3. a spacer assembly; 31. a channel; 32. a first side spacer; 321. a first avoidance unit; 322. a first mounting portion; 323. a third mounting portion; 33. a second side spacer; 331. a second avoidance unit; 332. a second mounting portion; 333. a fourth mounting portion; 34. a receiving groove; 35. an opening; 36. an accommodation space; 37. a liquid injection channel;

4. a lead-out sheet; 5. a cover plate assembly; 51. a pole; 52. a liquid injection port; 6. and a connecting sheet.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

The following describes a battery cell according to an embodiment of the present utility model with reference to fig. 1 to 21, and the present utility model also proposes a battery pack and an electric device having the same.

As shown in fig. 1 to 12, the battery cell 100 includes: a housing 1, a pole piece 2 and a spacer assembly 3.

The casing 1 is a triangular prism column structure, the pole core 2 is disposed in the casing 1, and at least one end of the pole core 2 is provided with a pole lug 21. And, the cross section of the space ring assembly 3 is in a triangular structure so as to be matched with the structure of the shell 1. For the casing 1 with the triangular prism column structure, correspondingly, the spacer ring assembly 3 is designed to be of a triangular structure, so that the space utilization rate inside the casing 1 can be improved.

And, the spacer ring assembly 3 is disposed at least at one end of the pole core 2, the spacer ring assembly 3 is provided with a channel 31, and the pole lug 21 passes through the channel 31 to draw current. In this way, the tab 21 passes through the channel 31 of the spacer assembly 3 to draw current, thereby realizing the charge and discharge operation of the battery cell 100.

Specifically, the tab 21 may be electrically connected to the lead-out tab 4 or the post through the channel 31 for the purpose of leading out current.

In the present embodiment, as shown in fig. 6, the pole core 2 is provided with the spacer assemblies 3 on both sides in the first direction, and the pole lugs 21 on both sides in the first direction of the pole core 2 respectively pass through the passages 31 of the corresponding spacer assemblies 3.

Therefore, the shell 1 of the battery cell 100 is of a triangular prism column structure, the space utilization rate of the interior of the shell 1 can be improved by designing the space ring assembly 3 in the shell 1 into a triangular structure, and the lugs 21 of the pole core 2 penetrate through the channels 31 of the space ring assembly 3 to draw out current, so that the internal structure of the battery cell 100 is well matched with the structure of the shell 1.

In some embodiments, the spacer ring assembly 3 comprises: the first side spacer 32 and the second side spacer 33, the first side spacer 32 and the second side spacer 33 are of triangular structures, and the first side spacer 32 and the second side spacer 33 are spliced relatively to form the spacer assembly 3 with triangular cross sections. Thus, the first side spacer 32 and the second side spacer 33 are both triangular, so that the first side spacer 32 and the second side spacer 33 are spliced to form a spacer assembly 3 with a large cross section and a triangular structure, and thus are matched with the housing 1.

It should be noted that one side length of each of the first side spacer 32 and the second side spacer 3 is the same size.

The first side spacer 32 and the second side spacer 33 may have a triangle structure with identical structures, as shown in fig. 7, where the first side spacer 32 and the second side spacer 33 are both right triangles, and the two are spliced to form a spacer assembly 3 with a regular triangle cross section. Of course, the first side spacer 32 and the second side spacer 33 may have triangular structures with different structures, and may be spliced to form the spacer assembly 3 having a triangular structure on the premise that one side of each of the two is the same size.

In some embodiments, as shown in fig. 7, 8, 10 and 11, the first side spacer 32 is provided with a first avoidance portion 321, the second side spacer 33 is provided with a second avoidance portion 331, and the first avoidance portion 321 and the second avoidance portion 331 cooperate to define a channel 31. Thus, the first side spacer ring 32 is provided with the first avoiding portion 321 at the side spliced with the second side spacer ring 33, the second side spacer ring 33 is provided with the second avoiding portion 331 at the side spliced with the first side spacer ring 32, and after the first side spacer ring 32 and the second side spacer ring 33 are spliced, the first avoiding portion 321 and the second avoiding portion 331 cooperate to define the channel 31, so that the tab 21 of the pole core 2 is penetrated out from the channel 31.

As shown in fig. 5, 14, 19 and 20, a receiving groove 34 is formed in one side of the first side spacer 32 or the second side spacer 33 facing the pole core 2, an opening 35 is formed in one side of the receiving groove 34 adjacent to the channel 31, the receiving groove 34 is used for converging the lugs 21 of the pole core 2, and the lugs 21 of the pole core 2 penetrate from the opening 35 to the channel 31. In the present embodiment, a receiving groove 34 is provided on a side of the first side spacer 32 facing the pole core 2 for converging the tabs 21 of the pole core 2, and an opening 35 is provided on a side of the receiving groove 34 adjacent to the channel 31 such that the converged tabs 21 pass out of the opening 35 to the channel 31 and then pass out of the spacer assembly 3 along the channel 31.

In some embodiments, at least one of the first side spacer 32 and the second side spacer 33 is provided with a through hole to define the channel 31. That is, the through holes may be formed in the first side spacer 32 to define the channel 31, the through holes may be formed in the second side spacer 33 to define the channel 31, or the through holes may be formed in the first side spacer 32 and the second side spacer 33 to jointly define the channel 31, so that the tab 21 of the pole core 2 may be led out from the channel 31 to draw current.

Further, if a through hole is formed in the first side spacer 32 to define the channel 31, correspondingly, a receiving groove 34 is formed in a side of the first side spacer 32 facing the pole core 2, an opening 35 is formed in a side of the receiving groove 34 adjacent to the channel 31, and the receiving groove 34 is used for converging the tab 21 of the pole core 2 and making the tab 21 of the pole core 2 pass through the opening 35 to the channel 31. Likewise, the second side spacer 33.

And, if the first side spacer 32 and the second side spacer 33 are provided with through holes to jointly define the channel 31, one of the first side spacer 32 or the second side spacer 33 may be provided with the accommodating groove 34.

As shown in fig. 13 to 17, the first side spacer 32 is provided with a first mounting portion 322, the second side spacer 33 is provided with a second mounting portion 332, and the first mounting portion 322 is detachably connected to the second mounting portion 332, so that the first side spacer 32 and the second side spacer 33 can be detachably connected.

Further, the first side spacer 32 is provided with a third mounting portion 323, and the second side spacer 33 is provided with a fourth mounting portion 333; the first mounting portion 322 provided on the first side spacer 32 corresponds in position to the second mounting portion 332 provided on the second side spacer 33, and the third mounting portion 323 provided on the first side spacer 32 corresponds in position to the fourth mounting portion 333 provided on the second side spacer 33.

The first mounting portion 322 and the third mounting portion 323 of the first side spacer 32 may have the same mounting structure, and the second mounting portion 332 and the fourth mounting portion 333 of the second side spacer 33 may have the same mounting structure, so that the first mounting portion 322 and the second mounting portion 332 are detachably engaged, and the third mounting portion 323 and the fourth mounting portion 333 are detachably engaged.

Alternatively, the first mounting portion 322 is a buckle protruding outwards from one side of the first side spacer 32, and the second mounting portion 332 is a slot provided on one side of the second side spacer 33, and the buckle is detachably inserted into the slot.

Of course, the first mounting portion 322 and the third mounting portion 323 of the first side spacer 32 may be different mounting structures, and the second mounting portion 332 and the fourth mounting portion 333 of the second side spacer 33 may also be different mounting structures, and the specific structure thereof may be reasonably selected according to actual use requirements.

As shown in the embodiment of fig. 14, the first mounting portion 322 is a buckle, the second mounting portion 332 is a slot, the third mounting portion 323 is a slot, the fourth mounting portion 333 is a buckle, the first mounting portion 322 is in plug-in fit with the third mounting portion 323, and the third mounting portion 323 is in plug-in fit with the fourth mounting portion 333.

In addition, as shown in fig. 19, the second side spacer 33 and the first side spacer 32 cooperate to define an accommodating space 36 for the tab 21 of the pole core 2, and the accommodating space 36 is disposed toward a side of the second side spacer 33 and the first side spacer 32 away from the pole core 2 for accommodating the folded tab 21. That is, after the collected tabs 21 pass through the channel 31 of the spacer assembly 3, there is a receiving space 36, and the tabs 21 can be bent in the receiving space 36.

As shown in fig. 7, at least one liquid injection passage 37 penetrating in the thickness direction is provided in each of the first side spacer 32 and the second side spacer 33, and the liquid injection passage 37 is provided so as to face the pole piece 2. In this way, the first side spacer 32 and the second side spacer 33 are respectively provided with the liquid injection channel 37, so that the electrolyte is injected into the pole core 2 from the liquid injection channel 37, and the liquid injection efficiency is improved. In the present embodiment, two liquid injection passages 37 are provided on the first side spacer 32 and the second side spacer 33, respectively, and the cross-sectional shape of the liquid injection passages 37 may be designed according to the specific configuration of the first side spacer 32 and the second side spacer 33.

As shown in fig. 6, 18 and 19, the battery cell 100 further includes: the lead-out piece 4, the lead-out piece 4 is arranged on one side of the space ring component 3, which is away from the pole core 2, and the pole lug 21 of the pole core 2 penetrates out of the channel 31 to be connected with the lead-out piece 4. In this way, the tab 21 passes through the channel 31 of the space ring assembly 3 and then is connected with the lead-out piece 4, and can be connected in a welding manner.

As shown in fig. 4 and 5, the battery cell 100 further includes: the cross section of the cover plate component 5 is of a triangular structure and is matched with the structure of the shell 1, and the cover plate component 5 is arranged on the shell 1 in a covering way and closes the opening of the shell 1. So, apron subassembly 5 lid is established on casing 1, guarantees casing 1 inside seal to, the cross section of apron subassembly 5 is triangle-shaped structure, with triangular prism column structure's casing 1 looks adaptation.

Wherein, apron subassembly 5 includes: the pole 51 is electrically connected to the tab 21 of the pole core 2, and the liquid injection port 52 is communicated with the inside of the casing 1. The tab 21 passes through the channel 31 and then can be connected with the pole column 51 on the cover plate assembly 5 through the lead-out sheet 4, and electrolyte is injected into the shell 1 through the liquid injection port 52 on the cover plate assembly 5, so that the pole piece in the pole core 2 fully reacts with the electrolyte.

A battery pack according to an embodiment of the second aspect of the present utility model includes: and a battery cell 100.

Specifically, the battery pack includes: the battery cells 100 and the connecting pieces 6 are stacked, the battery cells 100 are connected with each other in a mutually fitting mode through adjacent side faces, and the battery cells 100 are electrically connected with each other through the connecting pieces 6 at the end faces.

As shown in fig. 21, the cells 100 with the triangular prism column structures are stacked, wherein two adjacent cells 100 are bonded by the adjacent sides, for example, aerogel may be used for bonding, and two adjacent cells 100 are connected in series by the connecting piece 6, and two ends of the connecting piece 6 are respectively connected with the poles 51 of two adjacent cells 100.

The stacked battery packs of the regular hexagon can be formed by stacking the battery cells 100, and of course, the stacked battery packs of the parallelogram can also be formed, and the stacked battery packs can meet various types and specifications.

An electrical device according to an embodiment of the third aspect of the present utility model includes: and a battery pack.

Therefore, the casing 1 of the battery cell 100 is in a triangular prism column structure, the space ring component 3 in the casing 1 is designed into a triangular structure, the cover plate component 5 is also designed into a triangular structure, the space utilization rate in the casing 1 can be improved, the specific structure of the space ring component 3 is adaptively designed, the internal structure of the battery cell 100 is well adapted to the structure of the casing 1, the overall structure of the battery cell 100 in the triangular prism column structure is improved, and a plurality of battery cells 100 are stacked to meet battery packs of various types and specifications.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A cell, comprising:

the shell (1), the said shell (1) is the triangular prism column structure;

the pole core (2), the pole core (2) is arranged in the shell (1), and at least one end of the pole core (2) is provided with a pole lug (21);

the space ring assembly (3), the cross section of space ring assembly (3) be triangle-shaped structure and with casing (1) structure looks adaptation, space ring assembly (3) set up in at least one end of utmost point core (2), space ring assembly (3) are equipped with passageway (31), utmost point ear (21) pass passageway (31) are in order to draw forth the electric current.

2. The cell of claim 1, wherein the spacer assembly (3) comprises: the novel spacer assembly comprises a first side spacer ring (32) and a second side spacer ring (33), wherein the first side spacer ring (32) and the second side spacer ring (33) are of triangular structures, and the first side spacer ring (32) and the second side spacer ring (33) are spliced relatively to form a spacer assembly (3) with a triangular cross section.

3. The battery cell according to claim 2, wherein a first avoidance portion (321) is arranged on the first side spacer (32), a second avoidance portion (331) is arranged on the second side spacer (33), and the first avoidance portion (321) and the second avoidance portion (331) cooperate to define the channel (31).

4. A cell according to claim 3, characterized in that one side of the first side spacer ring (32) or the second side spacer ring (33) facing the pole core (2) is provided with a receiving groove (34), one side of the receiving groove (34) adjacent to the channel (31) is provided with an opening (35), and the receiving groove (34) is used for converging the pole lugs (21) of the pole core (2) and enabling the pole lugs (21) of the pole core (2) to penetrate out from the opening (35) to the channel (31).

5. The cell of claim 2, wherein at least one of the first side spacer (32) and the second side spacer (33) is provided with a through hole to define the channel (31).

6. The cell of claim 2, wherein the first side spacer (32) is provided with a first mounting portion (322), the second side spacer (33) is provided with a second mounting portion (332), and the first mounting portion (322) is detachably connected to the second mounting portion (332).

7. The cell of claim 6, wherein the first side spacer (32) is provided with a third mounting portion (323), and the second side spacer (33) is provided with a fourth mounting portion (333); a first mounting part (322) arranged on the first side spacer (32) corresponds to a second mounting part (332) arranged on the second side spacer (33), and a third mounting part (323) arranged on the first side spacer (32) corresponds to a fourth mounting part (333) arranged on the second side spacer (33).

8. The cell according to claim 2, characterized in that between the second side spacer (33) and the first side spacer (32) there is defined a housing space (36) for the tabs (21) of the pole core (2), said housing space (36) being arranged towards the side of the second side spacer (33) facing away from the pole core (2) from the first side spacer (32) for housing the tabs (21) after bending.

9. The cell according to claim 2, wherein at least one liquid injection channel (37) penetrating in the thickness direction is arranged on the first side spacer (32) and the second side spacer (33), and the liquid injection channel (37) and the pole core (2) are oppositely arranged.

10. The cell of claim 1, further comprising: the lead-out sheet (4), lead-out sheet (4) set up in space ring subassembly (3) deviate from one side of utmost point core (2), utmost point ear (21) are worn out passageway (31) with lead-out sheet (4) are connected.

11. The cell of claim 1, further comprising: the cover plate assembly (5), the cross section of cover plate assembly (5) is triangle-shaped structure and with casing (1) structure looks adaptation, cover plate assembly (5) lid is located on casing (1) and seal the opening of casing (1).

12. The cell according to claim 11, wherein the cover assembly (5) comprises: the electrode post (51) is electrically connected with the electrode lug (21), and the liquid injection port (52) is communicated with the inside of the shell (1).

13. A battery pack, comprising: the cell of any one of claims 1-12.

14. The battery pack of claim 13, wherein the battery pack comprises: the battery cells are stacked, two adjacent battery cells are mutually attached and connected through adjacent side faces, and two adjacent battery cells are electrically connected through the connecting sheets (6) at the end faces.

15. An electrical device, comprising: the battery pack of any one of claims 13-14.