CN218242195U - Battery and battery module - Google Patents

Abstract

The utility model provides a battery and battery module. The battery comprises a shell, an end cover assembly, a battery core, first insulating gummed paper and second insulating gummed paper; the end cover assembly covers an opening of the shell, the end cover assembly is provided with a liquid injection hole, the battery cell comprises a body, the body comprises an end face and a circumferential surface, the first insulating gummed paper is attached to the circumferential surface of the body, the second insulating gummed paper is attached to one end, close to the liquid injection hole, of the body, and the second insulating gummed paper is wound on part of the end face and part of the circumferential surface; in the battery, a plurality of surfaces of the battery core close to the liquid injection hole are covered by the insulating gummed paper, and the battery core is not easy to absorb water and fall off under the blocking effect of the insulating gummed paper.

Description

Battery and battery module

Technical Field

The utility model relates to a battery technology field especially relates to a battery and battery module.

Background

The battery comprises a battery core, wherein the battery core comprises a body and a tab, the body comprises a positive plate, a diaphragm and a negative plate, and the positive plate and the negative plate are coated with active materials. Under the condition that the shell of the battery is made of metal materials, the outer surface of the body can be wrapped with a layer of insulating gummed paper, so that the insulation between the body and the shell is realized.

However, during the production or use of the battery, water outside the battery may enter the battery, causing the cell to absorb water. After water absorption, the battery core is prone to material dropping (active materials fall off from the positive plate or the negative plate), and the material dropping is prone to cause abnormal discharge of the battery, so that the performance and the safety of the battery are affected. The existing encapsulation mode of the battery core is difficult to prevent the battery core from absorbing water.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery, the difficult material that absorbs water and take place to fall of electric core of this battery.

The utility model also provides a battery module including above-mentioned battery.

According to the utility model discloses a battery of first aspect embodiment includes: a housing having an accommodating chamber and an opening communicating with each other, the opening being located at an end of the housing; the end cover component is covered and sealed on the opening, and a liquid injection hole is formed in the end cover component; the battery cell comprises a body and a lug, wherein the body is provided with a circumferential surface and end faces, the end faces are arranged at two opposite ends of the circumferential surface, the lug is connected to the end faces, and the lug is electrically connected with the end cover assembly; the first insulating adhesive paper is attached to the circumferential surface; and the second insulating gummed paper is attached to one end, close to the liquid injection hole, of the body, and part of the end face and part of the circumferential surface are wound by the second insulating gummed paper.

According to the utility model discloses battery of first aspect embodiment has following beneficial effect at least: if annotate the liquid hole in time not sealed in the production process of battery, or if annotate the sealed of liquid hole bad in the production or the use of battery, the outside aqueous vapor of battery just can get into inside the battery from annotating the liquid hole, causes electric core to absorb water. The part of the battery core close to the liquid injection hole is relatively easy to absorb water and generate material dropping. The first insulating gummed paper covering the outside of the body of the battery provided by the utility model can prevent the body from contacting with the shell, thereby realizing the insulation between the battery core and the shell; because first insulating adhesive tape covers the circumferential surface of body, and the one end of annotating the liquid hole is established towards the body to the subsides of second insulating adhesive tape, and a plurality of surfaces at the position that electric core is close to annotating the liquid hole all are covered by insulating adhesive tape, and electric core is difficult for absorbing water and takes place to fall the material under the effect of blockking of insulating adhesive tape.

According to the utility model discloses a some embodiments, first insulation adhesive tape encircles the body, the head and the tail both ends interconnect of first insulation adhesive tape.

According to some embodiments of the present invention, the circumferential surface includes a large surface and a small surface connected to each other, the large surface is distributed in the thickness direction of the body, the small surface is distributed in the width direction of the body, and the overlapping area of the first insulating adhesive tape falls on one of the large surfaces.

According to some embodiments of the present invention, the second insulating gummed paper covers an overlapping area of the first insulating gummed paper.

According to some embodiments of the invention, the circumferential surface comprises a large face and a small face connected to each other, the large face being larger than the small face, the large face being distributed in a thickness direction of the body, the small face being distributed in a width direction of the body; the second insulating gummed paper covers one end, close to the liquid injection hole, of the end face, and the first insulating gummed paper is attached to the part, close to the liquid injection hole, of the large face and is covered by the second insulating gummed paper.

According to the utility model discloses a some embodiments, second insulated bond paper end to end both ends are continuous each other, the overlap area of second insulated bond paper set up in circumferential surface department.

According to some embodiments of the utility model, utmost point ear set up in the second insulated glue paper is kept away from annotate one side of liquid hole.

According to the utility model discloses a some embodiments, the relative both ends of casing are provided with the opening, the end cover subassembly connect in the relative both ends of casing, annotate the liquid hole and set up in the one end of end cover subassembly, annotate the liquid hole orientation the projection of terminal surface falls on the second insulated adhesive paper.

According to some embodiments of the present invention, along the arrangement direction of the end surfaces, the end portions of the first insulating adhesive tape protrude with respect to the end surfaces.

According to the utility model discloses a battery module of second aspect embodiment, including module shell and a plurality of battery as the first aspect embodiment, the battery install in the inside of module shell, it is a plurality of the battery is established ties or is parallelly connected each other.

Additional aspects and advantages of the invention 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 invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic diagram of a cell of a battery in an embodiment of the present invention;

fig. 2 is a schematic diagram of the battery cell in fig. 1 after wrapping the first and second insulating adhesive tapes;

fig. 3 isbase:Sub>A cross-sectional view (simplified schematic) of the encapsulated cell of fig. 2 taken along sectionbase:Sub>A-base:Sub>A;

fig. 4 is a schematic diagram of a battery according to an embodiment of the present invention;

FIG. 5 is an exploded schematic view of the battery of FIG. 4;

fig. 6 is a schematic view of a liquid filling hole of the battery of the present invention;

FIG. 7 is a schematic diagram of the relative positions of the liquid injection hole and the second piece of insulation paper.

Reference numerals: 101-cell, 102-body, 103-tab, 104-end face, 105-circumferential surface, 106-large face, 107-small face, 201-first adhesive paper, 202-second adhesive paper, 300-battery, 301-housing, 303-end cap assembly, 304-terminal, 305-opening, 306-receiving cavity, 401-seal, 402-liquid injection hole.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

The utility model provides a battery 300, battery 300 include casing 301, end cover assembly 303, electric core 101, first insulation adhesive tape 201 and second insulation adhesive tape 202. Fig. 1 shows a battery cell 101 in an embodiment of the present invention, and fig. 2 shows a state of the battery cell 101 in fig. 1 wrapped with a first insulating adhesive tape 201 and a second insulating adhesive tape 202. In fig. 2 and 5, the first and second insulating sheets 201 and 202 are filled with hatching, but fig. 2 and 5 are not cross-sectional views, in order to conveniently show the positions of the first and second insulating sheets 201 and 202.

Referring to fig. 4 and 5, the housing 301 has a receiving chamber 306 and an opening 305 communicating with each other, the opening 305 is located at an end portion of the housing 301, and the end cap assembly 303 covers the opening 305. The battery core 101 may be a winding battery core or a laminated battery core, the battery core 101 is disposed in the accommodating cavity 306, and the opening 305 provides power for the battery core 101 to enter the accommodating cavity 306. Referring to FIG. 6, the end cap assembly 303 further defines a pour hole 402, the pour hole 402 may be in communication with the receiving chamber 306, and the pour hole 402 may allow electrolyte to be poured into the receiving chamber 306 (electrolyte not shown).

Referring to fig. 1, a battery cell 101 includes a body 102 and tabs 103, where the body 102 includes a circumferential surface 105 and an end surface 104, and the tabs 103 are connected to the end surface 104; referring to fig. 5, the end cap assembly 303 includes a post 304, and the tab 103 is electrically connected to the post 304 of the end cap assembly 303. The end surfaces 104 are arranged on opposite ends of said circumferential surface 105, or the circumferential surface 105 is arranged between two end surfaces 104. In some embodiments, if the tabs 103 are respectively disposed at two ends of the body 102, the surface of the body 102 connected to the tabs 103 is the end surface 104; the portion of the exterior of the body 102 between the two end faces 104 is a circumferential surface 105. Taking fig. 1 as an example, the front side surface and the rear side surface of the body 102 are both the end surfaces 104 of the body 102, the upper, lower, left, and right side surfaces of the body 102 are located between the two end surfaces 104, and the circumferential surface 105 includes the front, rear, left, and right side surfaces of the body 102. In other embodiments, if the tabs 103 (including the positive tab and the negative tab) are disposed at the same end of the body 102, the surface of the end of the body 102 where the tabs 103 are disposed and the surface of the end of the body 102 opposite to the tabs 103 are the end surface 104 of the body 102.

The first and second insulating sheets 201 and 202 are both waterproof and can block water from passing through. Referring to fig. 2 and 3, a first insulating adhesive tape 201 is attached to the circumferential surface 105 of the body 102; with reference to fig. 2 and 5-7, the second insulating tape 202 is attached to one end of the main body 102 close to the pour hole 402, and the second insulating tape 202 is wound around a portion of the end surface 104 and a portion of the circumferential surface 105.

Specifically, referring to fig. 2 and 3, the first insulating tape 201 may be attached to the upper, lower, left, and right four side surfaces of the body 102, that is, the first insulating tape 201 is attached to the circumferential surface 105. With reference to fig. 2 and 7, the lid assembly 303 at the front end of the housing 301 is provided with a liquid injection hole 402, and a part of the second insulating gummed paper 202 is attached to one of the end faces 104 of the body 102 (the front side surface of the body 102); referring to fig. 2 and 3, a portion of the second insulation coated paper 202 is wound around the left and right side surfaces of the body 102. That is, the second insulating gummed paper 202 is wound around a portion of the end face 104 and a portion of the circumferential surface 105.

In addition, taking fig. 5 as an example, if the liquid injection hole 402 is also formed in the end cap assembly 303 located at the rear end of the casing 301, the second insulating adhesive tape 202 needs to be wound around the other end surface 104 of the main body 102 (the rear surface of the main body 102). Of course, if the lid assembly 303 at the rear end of the housing 301 is not provided with the pour hole 402, the second insulating adhesive paper 202 may be wound around the rear surface of the main body 102. In addition, the second insulating gummed paper 202 is wound around the circumferential surface 105, specifically, the second insulating gummed paper 202 is attached to the outer surface of the first insulating gummed paper 201, and it is not strictly limited that the second insulating gummed paper 202 is directly attached to the circumferential surface 105 of the body 102.

As shown in FIG. 6, the tip cap assembly 303 also includes a seal 401, the seal 401 being used to seal the pour hole 402. If the liquid injection hole 402 is not sealed in time during the production of the battery 300, or if the sealing of the liquid injection hole 402 is poor during the production and use of the battery 300, moisture outside the battery 300 may enter the battery 300 from the liquid injection hole 402, causing the battery cell 101 to absorb water. The portion of the battery cell 101 near the pour hole 402 is relatively more likely to absorb water and cause material drop. In the battery 300 provided by the present invention, the first insulating adhesive tape 201 covering the exterior of the body 102 can prevent the body 102 from contacting the casing 301, so as to realize the insulation between the battery core 101 and the casing 301; since the first insulating gummed paper 201 covers the circumferential surface 105 of the body 102, and the second insulating gummed paper 202 is attached to one end of the body 102 facing the liquid injection hole 402, a plurality of surfaces of the battery cell 101 near the liquid injection hole 402 are all covered by the insulating gummed paper (for example, the front, rear, left, right and upper side surfaces of the top of the body 102 are all covered), and the battery cell 101 is not prone to absorb water under the blocking effect of the insulating gummed paper, so that material dropping occurs.

As shown in fig. 3, in some embodiments, the first insulating adhesive tape 201 surrounds the body 102, and the head and the tail of the first insulating adhesive tape 201 are connected to each other. The first and the second ends of the first insulating adhesive tape 201 can be adhered to each other, for example, the tail end of the first insulating adhesive tape 201 is overlapped on the outer side of the head end of the first insulating adhesive tape 201, and the tail end of the first insulating adhesive tape 201 can be adhered on the outer side of the head end of the first insulating adhesive tape 201. Compared with the method of respectively attaching one piece of adhesive tape to each surface of the circumferential surface 105 of the body 102, the method of attaching the adhesive tape to the circumferential surface 105 of the body 102 by surrounding the body 102 with a whole piece of adhesive tape (i.e., the first insulating adhesive tape 201) is beneficial to improving the adhesive attaching efficiency of the battery cell 101.

For a conventional winding-type battery cell, after the winding of the pole piece and the diaphragm is completed, a tail end adhesive needs to be attached to the tail end of the diaphragm on the outer surface of the body 102, so that the wound body 102 is prevented from being scattered. Because the first insulating gummed paper 201 surrounds the body 102 and is connected end to end, the body 102 can be tightly wrapped by the first insulating gummed paper 201, and the risk of scattering the body 102 of the battery core 101 is reduced; moreover, in the case that the first insulating adhesive tape 201 can prevent the body 102 from spreading, the end adhesive may not be attached to the outer surface of the body 102 of the battery cell 101 configured in the winding structure.

Similarly, in some embodiments, the second insulation paper 202 can also be disposed around the body 102, and the head and the tail ends of the second insulation paper 202 are connected to each other, so as to improve the convenience of applying the adhesive on the second insulation paper 202. For example, referring to fig. 2, the second insulation adhesive paper 202 surrounds the body 102 and covers the four left, right, front, and rear side surfaces of the body 102.

Referring to fig. 1, the circumferential surface 105 includes a large face 106 and a small face 107 connected to each other, the large face 106 is disposed in the thickness direction of the body 102, the small face 107 is disposed in the width direction of the body 102, and the large face 106 has a larger area than the small face 107. In some embodiments, the overlapping area of the first insulating sticker 201 falls on one of the large faces 106. As described above, in fig. 1, the circumferential surface 105 of the body 102 includes the upper, lower, left, and right four side surfaces of the body 102; accordingly, in fig. 1, the large surfaces 106 are left and right side surfaces of the body 102, and the small surfaces 107 are upper and lower side surfaces of the body 102. Referring to fig. 1 and 3, the overlapping area of the first insulation coated paper 201 falls on the right side surface of the body 102. The area of big face 106 is bigger than facet 107, sets up the overlap region of first insulation adhesive tape 201 on one of them big face 106, can provide bigger operating area for rubberizing equipment or workman, reduces the bonding degree of difficulty of the head and the tail both ends of first insulation adhesive tape 201 to improve the rubberizing convenience of first insulation adhesive tape 201.

Similarly, in the case where the second paper insulating tape 202 is connected end to end, the overlapping position of the end to end of the second paper insulating tape 202 can also be provided at the circumferential surface 105. More specifically, the overlapping position of the head end and the tail end of the second insulating gummed paper 202 is the corresponding part of the large surface 106. The bonding difficulty at the head end and the tail end of the second insulating gummed paper 202 can be reduced by the arrangement, so that the rubberizing convenience of the second insulating gummed paper 202 is improved.

Referring to fig. 3, in some embodiments, in a case where the second insulating tape 202 is attached to the outer side of the first insulating tape 201, the second insulating tape 202 may cover an overlapping area of the first insulating tape 201 (which refers to an overlapping portion of the head and the tail ends of the first insulating tape 201). Under this kind of mode of setting, the bonding department at first insulating adhesive tape 201's head and the tail both ends is wrapped up by second insulating adhesive tape 202, can reduce the risk that the head and the tail both ends of first insulating adhesive tape 201 break away from each other like this to reduce the risk that electric core 101 scatters.

The second adhesive tape 202 covers the end of the end face 104 close to the pour hole 402, and the area of the portion of the first adhesive tape 201 attached to the large face 106 close to the pour hole 402 is covered with the second adhesive tape 202. For example, referring to fig. 5 and 6, the top end of the front side surface (one of the end surfaces 104) of the body 102 is the end close to the pour hole 402, the second insulating adhesive paper 202 can cover the top end of the front side surface of the body 102, and the second insulating adhesive paper 202 does not need to completely cover the end surface 104 of the body 102, thereby being beneficial to saving material cost and improving adhesive efficiency. Referring to fig. 1 and 2, in order to avoid the increase of the attaching difficulty of the second insulating gummed paper 202 caused by the inclined arrangement of the second insulating gummed paper 202, there may be provided: the first insulating adhesive sheet 201 is disposed near the pouring hole 402 at the tip of the portion attached to the front surface of the main body 102, and is covered with the second insulating adhesive sheet 202.

In the case where the battery 300 is placed in the position shown in fig. 4 and 5, the portion of the end surface 104 not covered by the second sheet of insulating tape 202 is far from the pour hole 402 and is soaked in the electrolyte (in the case where the electrolyte is sufficient), and even if the second sheet of insulating tape 202 only covers the tip of the end surface 104, the portion of the end surface 104 not covered by the second sheet of insulating tape 202 is not likely to come into contact with the moisture entering from the pour hole 402.

The tab 103 may be disposed on a side of the second adhesive tape 202 away from the injection hole 402 to reduce interference between the second adhesive tape 202 and the tab 103 when the second adhesive tape 202 is attached. Referring to fig. 5 and 6, the tab 103 may be disposed on the lower side of the second adhesive tape 202, such that the tab 103 is disposed on the side of the second adhesive tape 202 away from the injection hole 402.

In some embodiments, the weep hole 402 is disposed at one end of the endcap assembly 303, and a projection of the weep hole 402 toward the end face 104 falls onto the second piece of insulating tape 202. In FIG. 7, the projection of the pour hole 402 onto the end face 104 is located between the points B and C, the pour hole 402 is located at the top end of the endcap assembly 303, and the bottom edge of the portion of the second piece of insulation tape 202 attached to the end face 104 is lower than the bottom edge of the pour hole 402, such that the projection of the pour hole 402 onto the end face 104 falls onto the second piece of insulation tape 202. The liquid level of the electrolyte inside the casing 301 is usually lower than the position of the liquid injection hole 402, and if at least a part of the projection of the liquid injection hole 402 on the end face 104 falls on the lower end of the second insulating tape 202, the moisture entering from the liquid injection hole 402 easily contacts the part of the end face 104 which is not covered by the second insulating tape 202 and is not immersed in the electrolyte, and thus the battery cell 101 absorbs water. If the projection of the liquid injection hole 402 on the end face 104 completely falls on the second insulating gummed paper 202, the risk of water absorption of the part of the end face 104 not covered by the second insulating gummed paper 202 is low.

In some embodiments, the end of the first insulating adhesive sheet 201 protrudes relative to the end face 104 in the arrangement direction of the two end faces 104. For example, in fig. 2, a portion of the first insulating tape 201, the front end of which is not connected to the second insulating tape 202, may protrude forward with respect to the front end surface of the body 102, and a portion of the first insulating tape 201, the rear end of which is not adjacent to the second insulating tape 202, may protrude rearward with respect to the rear side surface of the body 102. The arrangement can make the first insulating gummed paper 201 slightly longer than the body 102, so as to ensure that the first insulating gummed paper 201 completely covers the circumferential surface 105, ensure the effectiveness of insulation, and the process precision requirement of the arrangement for the sticking of the first insulating gummed paper 201 is relatively low.

The utility model also provides a battery module, battery module include module shell and the above-mentioned battery 300 in the arbitrary embodiment. The battery module includes a plurality of batteries 300, the batteries 300 are mounted inside a module case, and the plurality of batteries 300 are connected in series or in parallel with each other.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (10)

1. A battery (300), characterized by comprising:

a housing (301) having an accommodating chamber (306) and an opening (305) communicating with each other, the opening (305) being located at an end of the housing (301);

the end cover component (303) is covered and sealed on the opening (305), and a liquid injection hole is formed in the end cover component (303);

the battery cell (101) comprises a body (102) and tabs (103), wherein the body (102) is provided with a circumferential surface (105) and end faces (104), the end faces (104) are arranged at two opposite ends of the circumferential surface (105), the tabs (103) are connected to the end faces (104), and the tabs (103) are electrically connected with the end cover assembly (303);

a first insulating adhesive tape (201) attached to the circumferential surface (105);

and the second insulating gummed paper (202) is attached to one end, close to the liquid injection hole (402), of the body (102), and the second insulating gummed paper (202) is wound on part of the end face (104) and part of the circumferential surface (105).

2. The battery (300) according to claim 1, wherein the first insulating tape (201) surrounds the body (102), and the first insulating tape (201) is connected with each other at both ends.

3. The battery (300) according to claim 2, wherein the circumferential surface (105) comprises a large face (106) and a small face (107) connected to each other, the large face (106) is distributed in a thickness direction of the body (102), the small face (107) is distributed in a width direction of the body (102), and an overlapping region of the first insulating adhesive tape (201) falls on one of the large faces.

4. The battery (300) of claim 3, wherein the second insulating adhesive paper (202) covers an overlapping area of the first insulating adhesive paper (201).

5. The battery (300) according to any of claims 1 to 4, wherein the circumferential surface (105) comprises a large face (106) and a small face (107) connected to each other, the large face (106) being larger than the small face (107), the large face (106) being distributed in a thickness direction of the body (102), the small face (107) being distributed in a width direction of the body (102);

the second insulating gummed paper (202) covers one end of the end face (104) close to the liquid injection hole (402), and the part, close to the liquid injection hole (402), of the large face (106) where the first insulating gummed paper (201) is attached is covered by the second insulating gummed paper (202).

6. The battery (300) according to claim 1, wherein the second insulating gummed paper (202) is connected end to end with the overlapping region of the second insulating gummed paper (202) being provided at the circumferential surface (105).

7. The battery (300) according to claim 1, wherein the tab (103) is disposed on the side of the second adhesive paper (202) away from the injection hole (402).

8. The battery (300) according to claim 1, wherein the openings (305) are provided at opposite ends of the case (301), the end cap assembly (303) is connected to opposite ends of the case (301), the liquid injection hole (402) is provided at one end of the end cap assembly (303), and a projection of the liquid injection hole (402) toward the end face (104) falls on the second insulating gummed paper (202).

9. The battery (300) according to claim 1, wherein an end of the first insulating adhesive paper (201) protrudes with respect to the end face (104) in an arrangement direction of the end face (104).

10. A battery module, characterized by comprising a module case and a plurality of the batteries (300) according to any one of claims 1 to 9, the batteries (300) being mounted inside the module case, the plurality of the batteries (300) being connected in series or in parallel with each other.

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