CN220324652U - Battery, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery, a battery pack and a vehicle, wherein the battery comprises: the novel solar cell comprises a cover plate and a pole core unit, wherein a lead-out sheet is arranged on the cover plate, the pole core unit comprises at least two pole cores, the two pole cores are distributed along the thickness direction, one end of each of the two pole cores, which faces the cover plate, is provided with a pole lug, the pole lugs of the two pole cores are respectively electrically connected with the lead-out sheet, and the pole lugs arranged on the two pole cores are staggered along the width direction of the pole cores. From this, the capacity needs of battery can be guaranteed along thickness direction arranging to two utmost point cores, and the one end of two utmost point cores towards the apron is equipped with utmost point ear respectively and utmost point ear staggers along the width direction of utmost point core and set up and can not form the overlap between the utmost point ear, reduces utmost point ear and apron welded technology degree of difficulty to can solve the thick processing difficulty that leads to utmost point ear overlength of thickness of utmost point core, simplify the process that utmost point ear and apron are connected, promoted the space utilization of battery and the security performance of battery. Meanwhile, interference between the two pole cores can be effectively avoided, and the assembly efficiency of the battery is improved.

Description

Battery, battery pack and vehicle

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery, a battery pack and a vehicle.

Background

In the prior art, the cover plate and the pole core of the battery are placed in parallel, the cover plate and the pole core are welded, the leading-out sheet is symmetrical to the width direction of the cover plate, and the process difficulty of forming the pole core with larger thickness is larger due to the limitation of the forming process of the battery, so that the forming difficulty of the battery with larger capacity requirement is larger.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, a first object of the present utility model is to provide a battery, which can improve the space utilization inside the battery, thereby improving the battery performance.

A second object of the present utility model is to provide a battery pack including the battery described in the above embodiments.

A third object of the present utility model is to provide a vehicle including the battery or the battery pack described in the above embodiments.

According to an embodiment of the first aspect of the present utility model, a battery includes: cover plate and pole core unit. The utility model discloses a pole piece, including the pole piece, the pole piece unit is equipped with the tab on the apron, the pole piece unit includes two at least pole pieces, two the pole piece is followed the thickness direction of pole piece is arranged, two the pole piece towards the one end of apron is equipped with the utmost point ear respectively, two the pole piece respectively with the tab electricity is connected, two the pole piece that sets up on the pole piece is followed the width direction stagger setting of pole piece.

According to the battery provided by the embodiment of the utility model, the two pole cores are distributed along the thickness direction, so that the capacity requirement of the battery can be ensured, the pole lugs are respectively arranged at one ends of the two pole cores facing the cover plate and are staggered along the width direction of the pole cores, so that overlapping can not be formed between the pole lugs, the length of the pole lugs is overlong when a single pole core is avoided, the welding process difficulty of the pole lugs and the cover plate is reduced, the process difficulty of overlong pole lugs caused by thicker pole core thickness can be solved, the procedure of connecting the pole lugs and the cover plate is simplified, and the space utilization rate of the battery and the safety performance of the battery are improved. Meanwhile, interference between two adjacent pole cores can be effectively avoided, and the assembly efficiency of the battery is improved.

In some embodiments, each of the pole pieces has a thickness H that satisfies: h is more than or equal to 10mm and less than or equal to 30mm.

In some embodiments, the tabs in two of the pole cores are spaced apart in a thickness direction of the pole cores.

In some embodiments, each of the pole cores has a thickness H, a spacing between the tabs of two adjacent pole cores is L, and the H, L satisfies: l is more than 0 and less than or equal to H.

In some embodiments, the tab includes at least two terminals, at least two of the two terminals extend toward two sides of the width direction of the pole core, the at least two of the two terminals are disposed at intervals along the thickness direction of the pole core, and the two tabs of the two pole cores are opposite to and connected to the two terminals, respectively.

In some embodiments, the tabs are arranged centrally symmetrically with respect to the cover plate.

In some embodiments, further comprising: a spacer. The partition is arranged between the cover plate and the pole core, two through holes are formed in the partition, the two through holes are opposite to the two pole lugs, and the two pole lugs of the two pole cores respectively penetrate through the two through holes.

In some embodiments, the spacer includes a first spacer and a second spacer butted in a thickness direction of the pole core, the first spacer and the second spacer together defining two of the through holes therebetween.

In some embodiments, the first spacer and the second spacer each comprise: the connecting parts are arranged between the two supporting parts, and the two connecting parts define the through holes.

In some embodiments, the cover plate is provided with at least one of an offset explosion-proof valve and a fill port.

In some embodiments, the pole core unit includes a plurality of pole cores, the plurality of pole cores are arranged along a thickness direction of the pole cores, one part of the plurality of pole cores has the pole lug facing the lead-out piece connected with one end of the lead-out piece, and the other part of the plurality of pole cores has the pole lug facing the lead-out piece connected with the other end of the lead-out piece.

A battery pack according to an embodiment of the second aspect of the present utility model includes the battery according to the embodiment of the first aspect of the present utility model described above.

A vehicle according to an embodiment of a third aspect of the present utility model includes a battery according to an embodiment of the above-described first aspect of the present utility model or a battery pack according to an embodiment of the above-described second aspect of the present utility model.

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 schematic view of a battery according to an embodiment of the present utility model.

Fig. 2 is an exploded view of a battery according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram of the connection of the pole core and the cover plate according to an embodiment of the present utility model.

Fig. 4 is another schematic view of a pole piece and cover plate according to an embodiment of the present utility model.

Fig. 5 is a schematic view of a spacer according to an embodiment of the present utility model.

Fig. 6 is a top view of a spacer according to an embodiment of the present utility model.

Fig. 7 is a schematic view of a first spacer according to an embodiment of the present utility model.

Reference numerals:

1. a battery;

10. a cover plate; 11. a lead-out sheet; 12. a lead-out end; 121. a first lead-out end; 122. a second exit end;

20. a pole core unit; 21. a pole core; 22. a first pole piece; 221. a first tab; 23. a second pole core; 231. a second lug;

30. a spacer; 31. a first spacer; 311. a first support portion; 312. a first connection portion; 313. a first positioning protrusion; 314. a first positioning groove; 32. a second spacer; 321. a second supporting part; 322. a second connecting portion; 33. a support part; 34. a through hole; 341. a first through hole; 342. a second through hole;

A. a thickness direction; B. a width direction; C. and the height direction.

Detailed Description

Embodiments of the present utility model are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and a battery 1 according to an embodiment of the present utility model is described below with reference to fig. 1 to 7, the battery 1 including a cap plate 10 and a pole core unit 20. The pole piece 21 has a thickness direction a, a width direction B, and a height direction C.

Specifically, as shown in fig. 1 to 7, the cover plate 10 is provided with the lead-out piece 11, the pole core unit 20 includes at least two pole cores 21, the two pole cores 21 are arranged along the thickness direction a of the pole cores 21, one ends of the two pole cores 21 facing the cover plate 10 are respectively provided with pole lugs, the pole lugs of the two pole cores 21 are electrically connected with the lead-out piece 11, and the pole lugs arranged on the two pole cores 21 are staggered along the width direction B of the pole cores 21.

Referring to fig. 1 to 4, tabs are disposed at both ends of the electrode core 21 along the length direction, wherein the tab at one end of the electrode core 21 adjacent to the cover plate 10 is a positive electrode tab, the tab at one end of the electrode core 21 far away from the cover plate 10 is a negative electrode tab, the polarities of the tabs at the same end of the plurality of electrode cores 21 are the same, and the plurality of electrode cores 21 are arranged in parallel along the thickness direction a. Here, taking an example of a tab extending in the height direction C of the tab 21 toward the cover plate 10 and protruding from the tab 21, one end of the tab is connected to the tab 21, the other end of the tab is connected to the cover plate 10, and the tab may be vertically set up with respect to the cover plate 10, one end of the tab, which is close to the cover plate 10 in the height direction C of the tab 21, is connected to the lead-out tab 11, and the connection manner between the tab and the lead-out tab 11 may be welding. The lugs extend along the width direction B of the pole cores 21, the two pole cores 21 are arranged along the thickness direction a, and the lugs of the two pole cores 21 are positioned at the same end so that parallel connection can be formed between the pole cores 21. The two pole pieces 21 include a first pole piece 22 and a second pole piece 23 arranged in the thickness direction a, the first pole piece 22 is provided with a first pole lug 221 at one end facing the cover plate 10 in the height direction C, and the second pole piece 23 is provided with a second pole lug 231 at one end facing the cover plate 10 in the height direction C. The orthographic projection of the first tab 221 on the projection plane along the thickness direction a of the pole core 21 is a first projection, the orthographic projection of the second tab 231 on the projection plane along the thickness direction a of the pole core 21 is a second projection, and the projections of the first projection and the second projection on the projection plane along the thickness direction a of the pole core 21 are not overlapped. That is, the two tabs are arranged in a staggered manner in the width direction B of the pole core 21 and are arranged at intervals in the thickness direction a of the pole core 21.

According to the battery 1 provided by the embodiment of the utility model, the two pole cores 21 are distributed along the thickness direction A, so that the capacity requirement of the battery 1 can be ensured, the pole lugs are respectively arranged at one ends of the two pole cores 21 facing the cover plate 10, and are staggered along the width direction B of the pole cores 21, so that overlapping can not be formed between the pole lugs, the length of each pole lug is overlong when a single pole core 21 is avoided, the welding process difficulty of the pole lug and the cover plate 10 is reduced, the problem that the overlong pole lug is difficult to manufacture due to thicker pole core 21 can be solved, the process of connecting the pole lug with the cover plate 10 is simplified, and the space utilization rate of the battery 1 and the safety performance of the battery 1 are improved. At the same time, interference between the adjacent two pole cores 21 can be effectively avoided, and the assembly efficiency of the battery 1 is increased.

According to some embodiments of the utility model, as shown in fig. 1, each pole piece 21 has a thickness H, H satisfying: h is more than or equal to 10mm and less than or equal to 30mm. If the thickness of the pole core 21 is smaller than 10mm, the thickness of the pole core 21 is too thin, so that the capacity of the pole core 21 cannot meet the requirement, the structural strength of the pole core 21 is low, and the assembly difficulty of the pole core 21 is increased. If the thickness of the pole core 21 is greater than 30mm, the thickness of the pole core 21 is too thick, which can make the pole ear too long, resulting in too large welding difficulty between the pole ear and the lead-out piece 11, and increasing the manufacturing difficulty and the assembly difficulty of the pole core 21. For example: h=20 mm. Therefore, the thickness of the pole core 21 is limited, the capacity requirement of the pole core 21 can be met, the performance of the battery 1 is improved, meanwhile, the length of the pole lug arranged on the pole core 21 can be shortened, the thickness of the pole core 21 can be reduced for the battery 1 with larger capacity requirement, the forming difficulty of the pole core 21 is reduced, and the design and the manufacture of the pole core 21 are facilitated.

According to some embodiments of the present utility model, as shown in fig. 1 to 4, the tabs in the two pole cores 21 are spaced apart in the thickness direction a of the pole cores 21. The two pole cores 21 include a first pole core 22 and a second pole core 23, the first pole core 22 is provided with a first pole lug 221 along the one end facing the cover plate 10 in the height direction C, and the second pole core 23 is provided with a second pole lug 231 along the one end facing the cover plate 10 in the height direction C. The first tab 221 and the second tab 231 are arranged at intervals, so that the first tab 221 and the second tab 231 can be prevented from interfering with each other when being connected with the leading-out sheet 11 of the cover plate 10, the use quantity of the tabs is increased, the thickness of the pole core 21 can be reduced, and the requirement of the pole core 21 on the length of the tab is reduced. From this, two utmost point ears set up along thickness direction A interval, can make between the utmost point ear along the thickness direction A dislocation set of utmost point core 21, be convenient for utmost point ear and draw out piece 11 to be connected, promote battery 1's space utilization, simultaneously, two utmost point ear interval set up the thickness that can reduce the utmost point core 21 of being connected with it to make the length of the demand when reducing utmost point ear welding under the prerequisite that satisfies electric capacity.

According to some embodiments of the present utility model, as shown in fig. 1, each pole core 21 has a thickness H, and a spacing between tabs of two adjacent pole cores 21 is L, H, L satisfies: l is more than 0 and less than or equal to H. For example, the adjacent two pole cores 21 are a first pole core 22 and a second pole core 23, wherein the first pole core 22 is provided with a first pole lug 221 at an end facing the cover plate 10 along the height direction C, and the second pole core 23 is provided with a second pole lug 231 at an end facing the cover plate 10 along the height direction C. The spacing between the tabs of adjacent two pole cores 21 is L and l=h. That is, the distance between the central planes of the two tabs along the thickness direction a of the pole core 21 may be the same as the thickness of the first pole core 22 or the second pole core 23, so that the distances from the central plane of the pole core 21 along the thickness direction a to the continuous sides of the thickness direction a of the pole core 21 are equal, which is convenient for the pole core 21 to be assembled, so that the adjacent two pole cores 21 may not need to be distinguished in position during assembly, and the assembly efficiency is improved. If L > H, the spacing between the tabs of two adjacent tabs 21 is too large, which is inconvenient for the tabs to be electrically connected with the lead-out tab 11, and is unfavorable for the utilization of the space in the battery 1. Therefore, the relation between the distance between the two pole cores 21 and the thickness of the pole cores 21 is limited, so that overlapping can not be formed between the pole lugs of the two adjacent pole cores 21, the overcurrent capacity of the pole lugs can be effectively improved, and the utilization rate of the space in the battery 1 is increased.

According to some embodiments of the present utility model, as shown in fig. 3 and 4, the lead-out tab 11 includes at least two lead-out terminals 12, one of the two lead-out terminals 12 extends toward both sides of the width direction B of the pole piece 21, that is, the end of the lead-out terminal 12 extends in the width direction B of the pole piece 21 toward a direction away from the center of the lead-out tab 11, the two lead-out terminals 12 are spaced apart in the thickness direction a of the pole piece 21 such that projections of the two lead-out terminals 12 in the thickness direction a of the pole piece 21 do not overlap, the tabs in the two pole pieces 21 are respectively opposite to and connected to the two lead-out terminals 12, and one end of the tab away from the pole piece 21 in the height direction C is connected to the lead-out terminal 12. The two lead-out terminals 12 include a first lead-out terminal 121 and a second lead-out terminal 122, the first lead-out terminal 121 and the second lead-out terminal 122 extend in a direction away from each other along a width direction B of the pole piece 21, and the first lead-out terminal 121 and the second lead-out terminal 122 are arranged in a staggered manner along a thickness direction a of the pole piece 21, and the first lead-out terminal 121 and the second lead-out terminal 122 are respectively used for being connected with a first tab 221 and a second tab 231 arranged on two adjacent pole pieces 21. Therefore, the two sides of the leading-out ends 12 in the width direction B of the pole core 21 extend to be favorable for improving the connection area of the leading-out ends 12, the two leading-out ends 12 are arranged at intervals along the thickness direction A of the pole core 21 so as to facilitate welding of the pole lugs and the leading-out ends 12, the leading-out piece 11 can be connected with the pole lugs of the two pole cores 21, the leading-out ends 12 and the pole lugs are oppositely arranged so as to effectively reduce the welding difficulty, the space utilization rate of the inside of the battery 1 is improved, and the mutual interference between the two pole cores 21 and the leading-out piece 11 is effectively avoided.

According to some embodiments of the utility model, as shown in fig. 3 and 4, the lead-out tab 11 is arranged centrally symmetrically with respect to the cover plate 10. I.e. the first and second lead-out terminals 121, 122 are arranged in central symmetry with the center of the lead-out tab 11 as the center point. Therefore, the arrangement of the leading-out pieces 11 which are arranged in a central symmetry manner with respect to the cover plate 10 is beneficial to connecting different leading-out ends 12 with the lugs of the two pole cores 21, so that interference between the lugs and the leading-out ends 12 during welding can be avoided, and the performance of the battery 1 is improved.

According to some embodiments of the utility model, as shown in fig. 1 and 2, further comprising: the spacer 30, the spacer 30 is set up between cover plate 10 and pole core 21, there are two through holes 34 on the spacer 30, two through holes 34 are opposite to two lugs, the lug of two pole cores 21 passes two through holes 34 separately. One end of the spacer 30 in the height direction C of the pole piece 21 is connected to the cover plate 10, and the other end is connected to the pole piece 21. Therefore, the through holes 34 are formed on the partition 30 so as to facilitate the passing of the lugs, the arrangement of the partition 30 plays a role in protecting the lugs, the lugs are arranged perpendicular to the cover plate 10, the partition 30 is positioned between the cover plate 10 and the pole core 21 so as to play a supporting role, the insulating property between the cover plate 10 and the pole core 21 is improved, and the short circuit of the battery 1 is avoided. The shape of the through hole 34 is matched with the cross section of the lug in the height direction C, the through hole 34 can prevent the lug from deforming or breaking when the cover plate 10 is extruded, the lug is convenient to be connected with the cover plate 10, and the overall structural strength of the battery 1 is improved.

According to some embodiments of the present utility model, as shown in fig. 5 to 7, the spacer 30 includes a first spacer 31 and a second spacer 32 butted in the thickness direction a of the pole core 21, and two through holes 34 are defined between the first spacer 31 and the second spacer 32 in common. The two through holes 34 include a first through hole 341 and a second through hole 342, the first through hole 341 and the second through hole 342 are staggered along the width direction B of the pole core 21, and are arranged at intervals along the thickness direction a of the pole core 21, and the first through hole 341 and the second through hole 342 correspond to the positions of the first pole tab 221 and the second pole tab 231, respectively. The first spacer 31 and the second spacer 32 are clamped at two ends of the width direction B of the pole core 21 on one side adjacent to each other, for example, two ends of the first spacer 31 are respectively provided with a first positioning protrusion 313 and a first positioning groove 314, two ends of the second spacer 32 are respectively provided with a second positioning groove matched with the first positioning protrusion 313 and a second positioning protrusion matched with the first positioning groove 314, when the first spacer 31 and the second spacer 32 are assembled, the first spacer 31 and the second spacer 32 respectively move between the cover plate 10 and the pole core 21 along the direction of approaching each other along the thickness direction a of the pole core 21, connection of the first spacer 31 and the second spacer 32 is realized through matching of the positioning protrusions and the positioning grooves, the installation structure is simple, installation and disassembly of the first spacer 31 and the second spacer 32 are facilitated, and the assembly efficiency is improved.

Therefore, the arrangement of the first partition 31 and the second partition 32 facilitates the assembly of the partition 30 with the cover plate 10 and the pole core 21 along the thickness direction A of the pole core 21, so that the partition 30 can be assembled after the pole lugs are connected with the pole core 21 and the lead-out piece 11 of the cover plate 10, the welding of the pole lugs and the cover plate 10 is facilitated, the welding process difficulty is reduced, meanwhile, the splicing and assembling of the first partition 31 and the second partition 32 can facilitate the formation of the through holes 34, the matching of the pole lugs and the through holes 34 is facilitated, the protection effect on the pole lugs is improved, the first partition 31 and the second partition 32 can separate the pole lugs, the phenomenon of short circuit between the pole lugs can be avoided or reduced, and the service life and the safety performance of the battery 1 are facilitated to be improved.

According to some embodiments of the utility model, the first spacer 31 and the second spacer 32 each comprise: the connecting portion and the supporting portion 33, two connecting portions are provided between two supporting portions 33, and two connecting portions define the through hole 34. The first spacer 31 and the second spacer 32 have the same shape, the first spacer 31 includes a first supporting portion 311 and a first connecting portion 312, the second spacer 32 includes a second supporting portion 321 and a second connecting portion 322, and the first connecting portion 312 and the second connecting portion 322 are spliced and arranged and jointly define two through holes 34 for the first tab 221 and the second tab 231 to pass through at the connecting portion. The support portion 33 extends along the peripheral side of the spacer 30, the cover plate 10 is stopped against the support portion 33 of the spacer 30 when the cover plate 10 is assembled with the spacer 30, one end of the first support portion 311 in the height direction C of the pole core 21 is connected to the cover plate 10, the other end of the first support portion 311 is connected to the end of the pole core 21, one end of the second support portion 321 in the height direction C of the pole core 21 is connected to the cover plate 10, and the other end of the second support portion 321 is connected to the end of the pole core 21. Therefore, the through holes 34 are defined by the first connecting portions 312 and the second connecting portions 322, the first connecting portions 312 and the second connecting portions 322 can limit the tabs, the first supporting portions 311 and the second supporting portions 321 can strengthen the structural strength of the first separating member 31 and the second separating member 32, the supporting portions 33 can protect the tabs, and the sealing performance of the assembly of the cover plate 10 and the separating member 30 is improved.

According to some embodiments of the present utility model, the cover plate 10 is provided with at least one of an offset explosion-proof valve and a filling hole. That is, the cover plate 10 may be provided with an explosion-proof valve or a liquid injection hole, and the explosion-proof valve or the liquid injection hole is located on one side of the width direction B of the cover plate 10, that is, the lead-out end 12 of the lead-out piece 11 is located on the other side of the width direction B of the cover plate 10, and does not interfere with the explosion-proof valve or the liquid injection hole, so as to avoid the explosion-proof valve or the liquid injection hole. The design shape of the lead-out piece 11 can be changed along with the design requirement, and can be an irregular shape, so that the two lead-out ends 12 of the lead-out piece 11 are staggered along the width direction B of the pole core 21, and the setting of the explosion-proof valve and the liquid injection hole is facilitated while the connection with the pole lugs is facilitated, so that the space utilization rate of the cover plate 10 is higher. Therefore, the space utilization rate of the cover plate 10 is improved, the volume of the battery 1 is reduced, and the production efficiency and performance of the battery 1 are improved.

According to some embodiments of the present utility model, the pole core unit 20 includes a plurality of pole cores 21, the plurality of pole cores 21 are arranged in a thickness direction a of the pole cores 21, a part of the plurality of pole cores 21 having a tab facing the lead-out tab 11 connected to one end of the lead-out tab, and another part of the plurality of pole cores 21 having a tab facing the lead-out tab connected to the other end of the lead-out tab 11. For example, the plurality of pole pieces 21 include a third pole piece and a fourth pole piece, which are respectively disposed on a side of the first pole piece 22 and the second pole piece 23 away from each other in the thickness direction a of the pole pieces 21, and the pole lugs of the first pole piece 22 and the third pole piece adjacent to the lead-out piece 11 are connected to each other, and the pole lugs of the second pole piece 23 and the fourth pole piece adjacent to the lead-out piece 11 are connected to each other, that is, the pole lugs of the first pole piece 22 and the third pole piece are connected to the first lead-out terminal 121, and the pole lugs of the second pole piece 23 and the fourth pole piece are connected to the second lead-out terminal 122. Therefore, the plurality of pole cores 21 are distributed along the thickness direction A, so that the capacity of the battery 1 can be improved, the arrangement of the pole lugs is beneficial to improving the space utilization rate in the battery 1, and the volume of the battery 1 is reduced while the capacity of the battery 1 is ensured.

A battery pack according to an embodiment of the second aspect of the present utility model includes the battery 1 of the above-described embodiment.

According to the battery pack disclosed by the embodiment of the utility model, the thickness of the pole core 21 is reduced, the exposed length of the pole lug can be effectively shortened, so that the welding difficulty of the pole lug and the pole core 21 is reduced, the assembly of the pole lug and the pole core 21 is simplified, the assembly efficiency of the battery 1 is improved, the assembly efficiency of the battery pack can be effectively improved, the molding difficulty of the battery pack is reduced, and the structural strength and the safety performance of the battery pack are improved.

The vehicle according to the embodiment of the third aspect of the utility model includes the battery 1 of the above embodiment or the battery pack of the above embodiment.

According to the vehicle provided by the embodiment of the utility model, the battery 1 or the battery pack in the embodiment is used, and the assembly process difficulty of the battery 1 is reduced by simplifying the assembly, so that the safety performance and the service life of the vehicle can be effectively improved.

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 utility model, a "first feature" or "second feature" may include one or more of such features. In the description of the present utility model, "plurality" means two or more. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

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 (13)

1. A battery, comprising:

the cover plate is provided with a leading-out sheet;

the pole core unit comprises at least two pole cores, the two pole cores are arranged along the thickness direction of the pole cores, the two pole cores are respectively provided with pole lugs at one ends of the cover plates, the two pole lugs of the pole cores are respectively electrically connected with the leading-out sheets, and the two pole lugs arranged on the pole cores are arranged in a staggered mode along the width direction of the pole cores.

2. The battery of claim 1, wherein each of the pole pieces has a thickness H that satisfies: h is more than or equal to 10mm and less than or equal to 30mm.

3. The battery according to claim 1, wherein the tabs in both the electrode tabs are arranged at intervals in the thickness direction of the electrode tab.

4. A battery according to claim 3, wherein each of the electrode cores has a thickness H, a spacing between the tabs of two adjacent electrode cores is L, and the H, L satisfies: l is more than 0 and less than or equal to H.

5. The battery according to claim 1, wherein the lead-out tab includes at least two lead-out terminals extending toward both sides in the width direction of the electrode core, respectively, the two lead-out terminals being disposed at intervals in the thickness direction of the electrode core, the tab in the two electrode cores being opposed to and connected to the two lead-out terminals, respectively.

6. The battery of claim 1, wherein the tabs are arranged centrally symmetrically with respect to the cover plate.

7. The battery according to claim 1, characterized by further comprising:

the partition piece is arranged between the cover plate and the pole core, two through holes are formed in the partition piece, the two through holes are opposite to the two pole lugs, and the two pole lugs of the two pole cores respectively penetrate through the two through holes.

8. The battery according to claim 7, wherein the separator includes a first separator and a second separator butted in a thickness direction of the pole core, the first separator and the second separator together defining two of the through holes therebetween.

9. The battery of claim 8, wherein the first separator and the second separator each comprise: the connecting parts are arranged between the two supporting parts, and the two connecting parts define the through holes.

10. The battery of any one of claims 1-9, wherein the cover plate is provided with at least one of an offset explosion-proof valve and a fill port.

11. The battery according to any one of claims 1 to 9, wherein the electrode core unit includes a plurality of electrode cores, the plurality of electrode cores are arranged in a thickness direction of the electrode cores, the tab of a part of the plurality of electrode cores that faces the lead-out tab is connected to one end of the lead-out tab, and the tab of another part of the plurality of electrode cores that faces the lead-out tab is connected to the other end of the lead-out tab.

12. A battery pack comprising the battery according to any one of claims 1 to 11.

13. A vehicle characterized by comprising the battery according to any one of claims 1 to 11 or the battery pack according to claim 12.