CN219892374U - Battery cell and battery with same - Google Patents

Abstract

The utility model provides a battery monomer and a battery with the same, wherein the battery monomer comprises: a housing; the battery cell is arranged in the shell, the battery cell is provided with a first surface and a second surface which are adjacently arranged, the battery cell comprises a tab, and the tab is positioned on one side of the first surface of the battery cell; the pole is arranged on one side of the second surface of the battery cell, and the switching piece is connected between the pole lug and the pole; the protection sheet is an insulating piece, and at least part of the protection sheet is arranged on one side of the first surface of the battery cell and is positioned between the switching sheet and the shell. According to the battery cell, the protection sheet is arranged between the switching sheet and the shell, so that the use safety of the battery cell can be improved.

Description

Battery cell and battery with same

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a battery monomer and a battery with the same.

Background

In the battery monomer in the existing scheme, the battery monomer of the lug side-out structure lacks effective protection at the switching device, and the switching device is easy for the shell contact to generate short circuit, so that the use safety of the battery monomer is not facilitated.

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 aims to provide a battery cell which can improve the use safety of the battery cell.

The utility model also provides a battery with the battery cell.

According to an embodiment of the first aspect of the present utility model, a battery cell includes: a housing; the battery cell is arranged in the shell and is provided with a first surface and a second surface which are adjacently arranged, the battery cell comprises a tab, and the tab is positioned on one side of the first surface of the battery cell; the pole is arranged on one side of the second surface of the battery cell, and the switching piece is connected between the pole lug and the pole; the protection sheet is an insulating piece, and at least part of the protection sheet is arranged on one side of the first surface of the battery cell and is positioned between the switching sheet and the shell.

According to the battery cell, the protection sheet is arranged between the switching sheet and the shell, so that the use safety of the battery cell can be improved.

According to some embodiments of the utility model, the projection of the tab is located within the projection of the protective sheet in a projection plane parallel to the first surface.

According to some embodiments of the utility model, the protective sheet has a thickness of 0.05mm to 0.2mm; and/or the protective sheet is a PDMS film or a PVA film.

According to some embodiments of the utility model, the first surfaces include two, the two first surfaces are located at two opposite sides of the battery core, the two first surfaces of the battery core are respectively provided with the tabs, the two tabs are respectively a positive tab and a negative tab, the two posts are respectively a positive post and a negative post, the positive post and the negative post are arranged at intervals on one side where the second surface is located, wherein the positive tab is connected with the positive post through a switching piece, and the negative tab is connected with the negative post through the switching piece.

According to some embodiments of the utility model, the pole is welded to the adapter tab, and the adapter tab is welded to the tab.

According to some embodiments of the utility model, the battery cell further comprises: and the insulating sheet is wrapped on the outer side of the battery cell.

According to some alternative embodiments of the utility model, the insulating sheet has slits formed therein, the slits being one or more of spaced apart.

According to some alternative embodiments of the utility model, the casing is provided with an explosion-proof valve, and at least one of the slits is opposite to the explosion-proof valve; and/or the shell is provided with a liquid injection hole, and at least one cutting joint is opposite to the inside and the outside of the liquid injection hole.

According to some embodiments of the utility model, the projection of the post is spaced apart from the projection of the slit in a projection plane parallel to the second surface.

A battery according to an embodiment of the second aspect of the utility model comprises a battery cell according to the first aspect of the utility model.

According to the battery provided by the utility model, the battery unit of the first aspect is provided, and the protection sheet is arranged between the switching sheet and the shell, so that the use safety of the battery unit can be improved.

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

Fig. 1 is a schematic view of a battery cell according to an embodiment of the present utility model at an angle;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a partial enlarged view at B in FIG. 2;

fig. 4 is a schematic view of an angle in which the battery cell shown in fig. 2 does not include a protection sheet and an insulation sheet;

fig. 5 is a schematic view of the battery cell shown in fig. 2 at yet another angle excluding the protective sheet and the insulating sheet;

fig. 6 is a schematic view of the battery cell shown in fig. 2 at still another angle without including a protective sheet and an insulating sheet;

fig. 7 is a schematic view of the insulating sheet shown in fig. 2.

Reference numerals:

100. a battery cell;

10. a housing; 11. an explosion-proof valve; 12. a liquid injection hole;

20. a battery cell; 21. a first surface; 22. a second surface; 231. a positive electrode tab; 232. a negative electrode ear;

31. a positive electrode post; 32. a negative electrode column;

40. a transfer sheet;

50. a protective sheet;

60. an insulating sheet; 61. cutting;

71. a first plastic sheet; 72. a second plastic sheet;

80. a seal ring;

91. an aluminum block; 92. and (5) a light aluminum sheet.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A battery cell 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 7.

Referring to fig. 1, 2 and 3, according to the battery cell 100 of the present utility model, the battery cell 100 includes: the battery comprises a shell 10, a battery cell 20, a pole, a switching piece 40 and a protection piece 50.

Specifically, the battery cell 20 is arranged in the shell 10, the battery cell 20 is provided with a first surface 21 and a second surface 22 which are adjacently arranged, the battery cell 20 comprises a tab, and the tab is positioned on one side of the first surface 21 of the battery cell 20; the pole is arranged on one side of the second surface 22 of the battery cell 20, and the adapter piece 40 is connected between the pole lug and the pole; the protection sheet 50 is an insulating member, at least part of the protection sheet 50 is disposed on the side of the first surface 21 of the battery cell 20 and between the switching sheet 40 and the housing 10, that is, the protection sheet 50 may be disposed on the side of the first surface 21 of the battery cell 20 and between the switching sheet 40 and the housing 10, and the protection sheet 50 may also be disposed entirely on the side of the first surface 21 of the battery cell 20 and between the switching sheet 40 and the housing 10.

For example, as shown in fig. 2, the transfer sheet 40 has an L-shape, the transfer sheet 40 includes a first portion and a second portion, the first portion of the transfer sheet 40 is arranged in the left-right direction, the second portion of the transfer sheet 40 is arranged in the up-down direction, the first portion and the second portion of the transfer sheet 40 are connected in an L-shape, the protection sheet 50 has an L-shape, and the protection sheet 50 is attached to the outer side of the transfer sheet 40.

When the battery cell 100 is assembled, the tab 40 is welded to the tab and the post, the protective sheet 50 is attached to the contact portion between the tab 40 and the case 10, and the battery cell 20 is finally assembled into the case 10, and at this time, the battery cell 100 is assembled.

In the prior art, the contact position between the switching piece 40 of the battery cell 100 with the tab side-out structure and the housing 10 lacks effective protection, and the switching piece 40 is easy to be in direct contact with the housing 10 to generate short circuit, which is not beneficial to the use safety of the battery cell 100.

According to the battery cell 100 disclosed by the utility model, the protection sheet 50 is arranged between the switching sheet 40 and the shell 10, so that the switching sheet 40 and the shell 10 can be prevented from being in direct contact to generate short circuit, the use safety of the battery cell 100 can be improved, and the stability of the internal components of the battery cell 20 can be better maintained.

According to the battery cell 100 of the embodiment of the utility model, the protection sheet 50 is arranged between the adapter sheet 40 and the housing 10, so that the use safety of the battery cell 100 can be improved.

According to some embodiments of the utility model, referring to fig. 1 and 3, the projection of the tab 40 is located within the projection of the protective sheet 50 in a projection plane parallel to the first surface 21. Thus, the protective sheet 50 can entirely cover the contact portion of the switching sheet 40 and the case 10, so that the contact short circuit between the switching sheet 40 and the case 10 can be prevented, and thus the safety of the battery cell 100 can be further improved.

According to some embodiments of the present utility model, referring to fig. 3, the protective sheet 50 has a thickness of 0.05mm to 0.2mm. Therefore, the strength of the protection sheet 50 can be ensured, the protection sheet 50 is prevented from being damaged, the contact condition of the switching sheet 40 and the shell 10 after the protection sheet 50 is damaged can be avoided, and meanwhile, the excessive thickness of the protection sheet 50 can be prevented, and more internal space of the shell 10 is occupied.

For example, as shown in fig. 3, the thickness of the protective sheet 50 may be: 0.05mm, 0.1mm, 0.15mm or 0.2mm.

Further, as shown in fig. 3, the protective sheet 50 is a PDMS (polydimethylsiloxane) film sheet or a PVA (polyvinyl alcohol) film sheet. Thereby, the insulating effect of the protection sheet 50 can be ensured, and at the same time, the elasticity of the protection sheet 50 can be ensured, absorbing the energy of the switching sheet 40 hitting the case 10.

According to some embodiments of the present utility model, referring to fig. 2, the first surface 21 includes two, the two first surfaces 21 are located at opposite sides of the battery cell 20, the two first surfaces 21 of the battery cell 20 are provided with two tabs, respectively, two tabs 231 and two tabs 232, respectively, two tabs 31 and two tabs 32, respectively, and the two tabs 31 and the two tabs 32 are arranged at intervals on one side of the second surface 22, where the positive tab 231 is connected to the positive tab 31 through the switching piece 40, and the negative tab 232 is connected to the negative tab 32 through the switching piece 40. In this way, the battery cell 100 can be ensured to operate normally.

For example, as shown in fig. 2, the first surface 21 of the battery cell 20 is a left side surface and a right side surface of the battery cell 20, the second surface 22 of the battery cell 20 is an upper side surface of the battery cell 20, the tabs are arranged on the left side of the first surface 21 and the right side of the first surface 21 of the battery cell 20, the left side is a negative tab 232, the right side is a positive tab 231, the tabs protrude upward from the second surface 22 of the battery cell 20, the tabs are arranged at intervals in the left-right direction, the left side is a positive tab 31, the right side is a negative tab 32, the lower end of the transfer tab 40 on the left side of the battery cell 20 is welded with the negative tab 232 and the upper end is welded with the negative tab 32, and the lower end of the transfer tab 40 on the right side of the battery cell 20 is welded with the positive tab 231 and the upper end is welded with the positive tab 31.

According to some embodiments of the present utility model, referring to fig. 2, the tab post is welded to the tab 40, and the tab 40 is welded to the tab. In this way, the connection strength between the tab and the tab 40 and between the tab and the tab 40 can be ensured, preventing the tab 40 from being separated from the tab and the tab. Preferably, the pole and the switching piece 40 are directly welded by laser, and the switching piece 40 and the pole lug are directly welded by laser, so that the connection strength can be ensured.

According to some embodiments of the present utility model, referring to fig. 2 and 3, the battery cell 100 may further include: and an insulating sheet 60, wherein the insulating sheet 60 is wrapped on the outer side of the battery cell 20. Thus, the insulating sheet 60 can insulate the battery cell 20 from the case 10, and prevent the battery cell 20 from being in contact with the case 10 to cause a short circuit.

For example, as shown in fig. 2, the insulating sheet 60 has a ring shape, and the insulating sheet 60 wraps the second surface 22, the lower side surface, the front side surface, and the rear side surface of the battery cell 20, so that the battery cell 20 can be insulated from the case 10.

According to some alternative embodiments of the present utility model, referring to fig. 2 and 7, slits 61 are formed on the insulating sheet 60, and the slits 61 are provided in one or more than one of the slits or in a plurality of slits arranged at intervals, that is, the slits 61 may be provided in one, two or three or more than one of the slits. Thus, when electrolyte is filled into the battery cell 20, the slit 61 can guide the flow direction of the electrolyte, so that the electrolyte is ensured to fully infiltrate the battery cell 20, and meanwhile, when the pressure of the battery cell 100 is relieved and the air is exhausted, the normal air exhaust of the battery cell 100 can be ensured, and the safety performance of the battery cell 100 is further improved.

For example, as shown in fig. 7, slits 61 are provided in insulating sheet 60 covering upper first surface 21 of cell 20, four slits 61 are provided, slits 61 extend in the left-right direction, slits 61 are provided in two rows and are arranged at intervals in the front-rear direction, and two slits 61 are provided in each row.

According to some alternative embodiments of the present utility model, referring to fig. 1, the explosion-proof valve 11 is provided on the housing 10, and at least one slit 61 is opposite to the explosion-proof valve 11, that is, one, two or three or more slits 61 are opposite to the explosion-proof valve 11. Thus, when the battery cell 100 is depressurized, the gas discharged by the depressurization can be ensured to be normally discharged out of the battery cell 100 through the kerf 61, thereby preventing the explosion of the battery cell 100.

Further, as shown in fig. 1, the casing 10 is provided with a liquid injection hole 12, and at least one slit 61 is aligned with the liquid injection hole 12, that is, one, two, or three or more slits 61 are aligned with the liquid injection hole 12. Therefore, when the electrolyte is filled into the battery cell 20, the flow direction of the electrolyte can be better guided, and the battery cell 20 is fully soaked.

According to some embodiments of the utility model, referring to fig. 1 and 7, the projection of the post is spaced from the projection of the slit 61 in a projection plane parallel to the second surface 22. Thus, welding slag can be prevented from falling into the battery cell 20 when welding the adapter plate 40 and the terminal post.

According to some embodiments of the present utility model, referring to fig. 1 and 3, the battery cell 100 may further include: the first plastic piece 71, the second plastic piece 72, the sealing ring 80, the aluminum block 91 and the aluminum flake 92. The first plastic sheet 71 is sleeved on the pole and is located on the upper side of the adapter sheet 40, the aluminum sheet 92 is covered on the upper side of the plastic sheet and extends out of the reserved hole of the aluminum sheet 92, the sealing ring 80 is sleeved on the pole and is located between the pole and the aluminum sheet 92, the second plastic sheet 72 is sleeved on the pole and is located on the upper side of the aluminum sheet 92, and the aluminum block 91 is connected on the radial outer side of the pole and is located on the upper side of the plastic sheet.

Thus, the first plastic sheet 71 can insulate the aluminum plate 92 from the adapter plate 40, the sealing ring 80 can seal the pole from the protruding position of the reserved hole of the aluminum plate 92, and the second plastic sheet 72 can insulate the aluminum block 91 from the aluminum plate 92, and can provide an installation position for the aluminum block 91.

A battery according to an embodiment of the second aspect of the present utility model, referring to fig. 2, includes a battery cell 100 of the first aspect of the present embodiment.

According to the battery of the embodiment of the present utility model, by providing the battery cell 100 of the embodiment of the first aspect, the protection sheet 50 is provided between the adapter sheet 40 and the case 10, so that the use safety of the battery cell 100 can be improved.

A battery cell 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 7.

The battery according to the embodiment of the present utility model, as shown in fig. 1, includes a plurality of battery cells 100.

The battery cell 100 includes: the battery comprises a shell 10, a battery core 20, a pole, two adapter plates 40, two protection plates 50, an insulating plate 60, two first plastic plates 71, two second plastic plates 72, two sealing rings 80, two aluminum blocks 91 and an aluminum sheet 92.

Wherein the shell 10 is a cuboid with an open upper part, the shell 10 is provided with a liquid injection hole 12 and an explosion-proof valve 11, and a light aluminum sheet 92 is covered on the open side of the shell 10; the battery cell 20 is provided with two first surfaces 21 and one second surface 22, the left side surface and the right side surface of the battery cell 20 are the first surfaces 21, the electrode lugs comprise positive electrode lugs 231 and negative electrode lugs 232, the first surface 21 on the left side of the battery cell 20 is provided with the negative electrode lugs 232, the first surface 21 on the right side of the battery cell 20 is provided with the positive electrode lugs 231, the second surface 22 on the upper side of the battery cell 20, and two electrode posts extend upwards from the second surface 22 of the battery cell 20; the poles are arranged at intervals along the left-right direction, the pole on the left side is a negative pole 32, and the pole on the right side is a positive pole 31; the switching sheet 40 is arranged at the left side and the right side of the battery cell 20, the switching sheet 40 is L-shaped, the lower end of the switching sheet 40 is connected with the tab, and the upper end of the switching sheet 40 is connected with the post; the protective sheet 50 is L-shaped, and the protective sheet 50 is attached to the outer side of the switching sheet 40; the insulating sheet 60 is annular, and the insulating sheet 60 wraps the second surface 22, the lower side surface, the front side surface and the rear side surface of the battery cell 20; the first plastic sheet 71 is sleeved on the pole and is arranged on the upper side of the adapter sheet 40; the pole extends out of the housing 10 through the preformed hole of the photo-aluminum sheet 92; the sealing ring 80 is arranged at the position where the pole passes through the preformed hole of the aluminum flake 92 to extend out; the second plastic sheet 72 is sleeved on the pole and arranged on the upper side of the aluminum sheet 92; the aluminum block 91 is sleeved on the pole and arranged on the upper side of the plastic sheet.

When the battery cell 100 is assembled, the insulating sheet 60 covers the battery cell 20, one of the switching sheets 40 is welded with the positive electrode lug 231 and the positive electrode post 31, the other switching sheet 40 is welded with the negative electrode lug 232 and the negative electrode post 32, one of the protecting sheets 50 is attached to the outer side of the switching sheet 40, the battery cell 20 is mounted in the shell 10, the first plastic sheet 71 is sleeved at the position of the post, the aluminum sheet 92 is covered on the open side of the shell 10, the sealing ring 80 is sleeved on the post and between the post and the aluminum sheet 92, the second plastic sheet 72 is sleeved on the post and on the upper side of the aluminum sheet 92, and the aluminum block 91 is arranged on the upper side of the second plastic sheet 72.

According to the battery cell 100 disclosed by the utility model, the protection sheet 50 is arranged between the adapter sheet 40 and the shell 10, so that the use safety of the battery cell 100 can be improved, meanwhile, the slit 61 is arranged on the insulating sheet 60, when electrolyte is filled into the battery cell 20, the slit 61 can guide the flow direction of the electrolyte, so that the electrolyte is ensured to fully infiltrate the battery cell 20, and in addition, when the battery cell 100 is depressurized and exhausted, the normal exhaust of the battery cell 100 can be ensured, and the safety performance of the battery cell 100 is further 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.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

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 (10)

1. A battery cell, comprising:

a housing;

the battery cell is arranged in the shell and is provided with a first surface and a second surface which are adjacently arranged, the battery cell comprises a tab, and the tab is positioned on one side of the first surface of the battery cell;

the pole is arranged on one side of the second surface of the battery cell,

the switching piece is connected between the pole lug and the pole post;

the protection sheet is an insulating piece, and at least part of the protection sheet is arranged on one side of the first surface of the battery cell and is positioned between the switching sheet and the shell.

2. The battery cell of claim 1, wherein the projection of the tab is located within the projection of the protective sheet in a projection plane parallel to the first surface.

3. The battery cell according to claim 1, wherein the thickness of the protective sheet is 0.05mm to 0.2mm; and/or the protective sheet is a PDMS film or a PVA film.

4. The battery cell of claim 1, wherein the first surface comprises two first surfaces on opposite sides of the cell, the two first surfaces of the cell are provided with the tabs, the two tabs are respectively a positive tab and a negative tab,

the number of the polar posts is two, the two polar posts are respectively a positive polar post and a negative polar post, the positive polar post and the negative polar post are distributed at intervals on one side of the second surface,

the positive electrode lug is connected with the positive electrode post through the switching piece, and the negative electrode lug is connected with the negative electrode post through the switching piece.

5. The battery cell of claim 1, wherein the post is welded to the tab and the tab is welded to the tab.

6. The battery cell of any one of claims 1-5, further comprising: and the insulating sheet is wrapped on the outer side of the battery cell.

7. The battery cell of claim 6, wherein the insulating sheet has slits formed therein, the slits being one or more of spaced apart.

8. The battery cell as defined in claim 7, wherein the housing is provided with an explosion-proof valve, at least one of the slits being aligned with the explosion-proof valve; and/or the number of the groups of groups,

the shell is provided with a liquid injection hole, and at least one cutting joint is opposite to the inside and the outside of the liquid injection hole.

9. The battery cell of claim 7, wherein a projection of the post is spaced apart from a projection of the slit in a projection plane parallel to the second surface.

10. A battery comprising a battery cell according to any one of claims 1-9.