CN220253440U - Battery and battery module - Google Patents
Battery and battery module Download PDFInfo
- Publication number
- CN220253440U CN220253440U CN202321570873.7U CN202321570873U CN220253440U CN 220253440 U CN220253440 U CN 220253440U CN 202321570873 U CN202321570873 U CN 202321570873U CN 220253440 U CN220253440 U CN 220253440U
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- battery
- electrolyte
- winding cores
- liquid absorbing
- winding
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- 238000004804 winding Methods 0.000 claims abstract description 81
- 239000003792 electrolyte Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 15
- 238000001125 extrusion Methods 0.000 abstract description 9
- 230000001502 supplementing effect Effects 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000005213 imbibition Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application discloses a battery and battery module belongs to battery technical field. The battery comprises a shell, a winding core and a liquid absorbing piece, wherein electrolyte is arranged in the shell; at least two winding cores are arranged in the shell; the liquid absorbing piece is arranged between the two winding cores and is used for conveying the absorbed electrolyte to the upper parts of the winding cores. Because the winding cores can generate expansion deformation in the charge-discharge circulation process, the liquid absorbing piece is arranged between the two winding cores, and electrolyte in the liquid absorbing piece can be extruded under the action of extrusion force generated by the expansion deformation of the two winding cores, so that the electrolyte extruded from the upper part of the liquid absorbing piece flows to the upper part of the winding cores, the effect of supplementing the electrolyte to the winding cores is achieved, and the cycle life of the battery is prolonged.
Description
Technical Field
The application belongs to the technical field of batteries, and particularly relates to a battery and a battery module.
Background
Currently, batteries generally include a jellyroll, an electrolyte, a battery case accommodating the jellyroll and the electrolyte, and a cap plate hermetically mounted on the battery case. However, in the long-term use process, along with continuous consumption of electrolyte in the winding core, part of the electrolyte gathers at the bottom of the battery shell due to the action of gravity, so that the electrolyte cannot be adsorbed and utilized by the winding core all the time, and the cycle life of the battery can be further influenced.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a battery and a battery module, through set up the imbibition piece between two book cores, electrolyte in the imbibition piece is based on capillary phenomenon with the electrolyte of bottom and is carried to upper portion to being extruded and flow to the upper portion of book core under the effect of the extrusion force that the expansion deformation produced because of charging and discharging of book core, thereby reach the effect of supplementing electrolyte to book core, extension battery's cycle life.
In a first aspect, the present application provides a battery comprising:
a housing in which an electrolyte is provided;
the winding cores are arranged in the shell;
and the liquid absorbing piece is arranged between the two winding cores and is used for conveying the absorbed electrolyte to the upper parts of the winding cores.
According to the battery, the winding cores can be subjected to expansion deformation in the charge-discharge circulation process, the liquid absorbing piece is arranged between the two winding cores, electrolyte in the liquid absorbing piece can be extruded under the action of extrusion force generated by the expansion deformation of the two winding cores, and then the electrolyte extruded from the upper part of the liquid absorbing piece flows to the upper part of the winding cores, so that the effect of supplementing the electrolyte to the winding cores is achieved, and the cycle life of the battery is prolonged.
According to one embodiment of the present application, the liquid absorbing member includes:
the two winding cores are respectively contacted with two sides of the vertical part correspondingly;
the first horizontal part is arranged on the lower surface of the vertical part, and the lower surface of the winding core is contacted with the horizontal part. According to one embodiment of the present application, the liquid absorbing member further includes:
the second horizontal part is arranged on the upper surface of the vertical part, and the upper surface of the winding core is contacted with the horizontal part.
According to one embodiment of the present application, the wick is made of an intumescent material.
According to one embodiment of the application, the winding cores are provided with a plurality of liquid absorbing pieces, and the liquid absorbing pieces are arranged between every two adjacent winding cores.
According to one embodiment of the application, the inner wall of the housing is provided with an insulating heat conducting layer.
According to one embodiment of the present application, the insulating and thermally conductive layer is formed by a spray coating process.
According to one embodiment of the application, the roll core further comprises a top cover connected with the shell for sealing the roll core.
In a second aspect, the present application provides a battery module comprising a plurality of batteries as described above.
According to the battery module, through set up the imbibition piece between two book cores of battery, electrolyte in the imbibition piece is carried to upper portion with the electrolyte of bottom based on capillary phenomenon to by extruding and flowing to the upper portion of book core under the effect of the extrusion force that the expansion deformation produced because of charging and discharging at the book core, thereby reach the effect of supplementing electrolyte to the book core, extension battery's cycle life.
Additional aspects and advantages of the application 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 application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
fig. 1 is one of schematic structural diagrams of a battery provided in an embodiment of the present application;
FIG. 2 is a second schematic diagram of a battery according to an embodiment of the present disclosure;
fig. 3 is a cross-sectional view of A-A in fig. 2.
Reference numerals:
110. a housing;
121. a winding core;
130. a liquid absorbing member; 131. a vertical portion; 132. a first horizontal portion;
140. and a top cover.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
A battery provided in an embodiment of the present application, including a case 110, a winding core 121, and a liquid absorbing member 130, is described below with reference to fig. 1 to 3.
The case 110 is provided therein with an electrolyte, that is, at least a portion of the winding core 121 is immersed in the electrolyte so that the electrolyte penetrates into the inside of the winding core 121 and chemically reacts with the winding core 121 to form an electric current.
At least two winding cores 121 are provided in the housing 110 to increase the overall charge capacity of the battery.
The liquid absorbing member 130 is disposed between the two winding cores 121 for transferring the absorbed electrolyte to the upper portion of the winding cores 121.
It should be noted that, since the electrolyte is located at the bottom of the housing 110, the liquid absorbing member 130 should first move the absorbed electrolyte to the upper portion of the liquid absorbing member 130 by using capillary phenomenon. Capillary phenomenon refers to a situation in which liquid moves upward due to attractive force between molecules of the liquid, that is, the liquid absorbing member 130 functions like a sponge, the liquid absorbing member 130 can sufficiently absorb the electrolyte in the case 110 until saturation is reached, and the absorbed electrolyte moves to the upper portion of the liquid absorbing member 130.
It can be understood that, since the winding cores 121 are expanded and deformed during the charge and discharge cycle, by disposing the liquid absorbing member 130 between the two winding cores 121, the electrolyte in the liquid absorbing member 130 is extruded under the action of the extrusion force generated by the expansion and deformation of the two winding cores 121, so that the electrolyte extruded from the upper portion of the liquid absorbing member 130 flows to the upper portion of the winding cores 121, thereby achieving the effect of supplementing the electrolyte to the winding cores 121 and prolonging the cycle life of the battery.
According to the battery provided by the embodiment of the application, the liquid absorbing piece 130 is arranged between the two winding cores 121, the electrolyte in the liquid absorbing piece 130 conveys the electrolyte at the bottom to the upper part based on capillary phenomenon, and the electrolyte is extruded and flows to the upper part of the winding cores 121 under the action of the extrusion force generated by expansion deformation of the winding cores 121 due to charge and discharge, so that the effect of supplementing the electrolyte to the winding cores 121 is achieved, and the cycle life of the battery is prolonged.
In some embodiments, as shown in fig. 3, the liquid absorbing member 130 includes a vertical portion 131 and a first horizontal portion 132, and the two winding cores 121 are respectively in corresponding contact with both sides of the vertical portion 131; the first horizontal portion 132 is disposed at the lower surface of the vertical portion 131, and the lower surface of the winding core 121 is in contact with the horizontal portion.
It will be appreciated that by providing the vertical portion 131 and the first horizontal portion 132, the absorbent article 130 is inverted T-shaped. Since the two winding cores 121 are respectively contacted with the two sides of the vertical part 131, the extrusion force of the liquid absorbing piece 130 can be improved when the winding cores 121 are expanded and deformed, so that more electrolyte can be conveyed to the winding cores 121 as much as possible; in addition, since the lower surface of the winding core 121 is in contact with the upper surface of the first horizontal part 132, the space occupied by the liquid absorbing member 130 and the winding core 121 can be as small as possible, and the battery structure can be more compact.
In this embodiment, the length of the vertical portion 131 is equal to the length of the winding core 121, so that the internal structure of the battery is more compact, and meanwhile, the vertical portion 131 and the winding core 121 are ensured to be in complete contact, so that the extrusion force received by the vertical portion 131 is uniform, and the electrolyte supplementing effect is improved.
In some embodiments, the surface area of the first horizontal portion 132 is not greater than the surface area of the lower surface of the winding core 121, so as to ensure that the upper surface of the first horizontal portion 132 is completely abutted against the lower surface of the winding core 121.
In some embodiments, the absorbent article 130 further includes a second horizontal portion (not shown) disposed on an upper surface of the vertical portion 131, and an upper surface of the winding core 121 is in contact with the horizontal portion.
It will be appreciated that by providing the second horizontal portion, the absorbent article 130 is i-shaped. By contacting the upper surface of the winding core 121 with the lower surface of the second horizontal part, a certain guiding effect can be achieved on the flow of the electrolyte, so that the electrolyte extruded by the liquid absorbing member 130 can flow to the upper surface of the winding core 121 along the second horizontal part, and the conveying efficiency of the electrolyte is improved.
In some embodiments, the wicking member 130 is made of an intumescent material, i.e., the ability to expand by absorbing electrolyte through the wicking member 130 increases the compactness of the wicking member 130 in contact with the winding core 121, increasing the electrolyte replenishment effect. It will be appreciated that the specific material and thickness of the liquid absorbing member 130 may be adjusted according to the actual situation, so long as the liquid absorbing effect is ensured, and the present embodiment is not limited thereto.
In some embodiments, a plurality of winding cores 121 are provided, a plurality of liquid absorbing members 130 are provided, and liquid absorbing members 130 are provided between two adjacent winding cores 121.
It can be understood that by providing a plurality of winding cores 121, the storage capacity of the battery can be further improved, and the liquid absorbing member 130 is disposed between two adjacent winding cores 121, so that the cycle life of the battery can be further improved. It should be noted that the number of winding cores 121 may be designed according to practical requirements, and the present embodiment is not limited in particular.
In some embodiments, the plurality of winding cores 121 are sequentially arranged in the width direction of the housing 110. Of course, in other embodiments, the two may be sequentially arranged along the length direction, which is not particularly limited in this embodiment.
Considering that in the related art, the PET film is often wrapped outside the winding core 121 and then is integrally put into the housing 110, so that insulation between the housing 110 and the winding core 121 can be ensured, but due to poor heat dissipation effect of the PET film, poor heat dissipation inside the battery is easily caused, so that the internal temperature of the battery is accumulated, the battery performance is affected, great potential safety hazard is brought, and thermal runaway is easily caused.
In order to solve the above problems, the inner wall of the case 110 is provided with an insulating heat conductive layer, thereby increasing the heat conductive property between the winding core 121 and the case 110 while securing the insulating property between the winding core 121 and the case 110, and improving the heat dissipation property inside the battery. It is understood that the specific material and thickness of the insulating and heat conducting layer can be adjusted according to practical situations, so long as the insulating and heat conducting effect can be ensured, and the embodiment is not particularly limited.
In some embodiments, the insulating and heat conducting layer is formed by a spraying process, and has the advantages of flexible and convenient processing and fewer operation steps.
In some embodiments, as shown in fig. 1-3, the battery further includes a top cover 140, the top cover 140 being coupled to the housing 110 for sealing the winding core 121 and the wick 130. Namely, the electrolyte, the winding core 121 and the liquid absorbing member 130 are disposed in the sealed space formed between the top cover 140 and the housing 110, thereby providing a certain protection effect.
The embodiment of the application also provides a battery module which comprises a plurality of batteries.
According to the battery provided by the embodiment of the application, the liquid absorbing piece 130 is arranged between the two winding cores 121 of the battery, the electrolyte in the liquid absorbing piece 130 conveys the electrolyte at the bottom to the upper part based on capillary phenomenon, and the electrolyte is extruded and flows to the upper part of the winding core 121 under the action of the extrusion force generated by expansion deformation of the winding core 121 due to charge and discharge, so that the effect of supplementing the electrolyte to the winding core 121 is achieved, and the cycle life of the battery is prolonged.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "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 orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, "a first feature", "a second feature" may include one or more of the features.
In the description of the present application, the meaning of "plurality" is two or more.
In the description of this application, 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 by another feature therebetween.
In the description of this application, 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 indicating 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 present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application 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 principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A battery, comprising:
a housing in which an electrolyte is provided;
the winding cores are arranged in the shell;
and the liquid absorbing piece is arranged between the two winding cores and is used for conveying the absorbed electrolyte to the upper parts of the winding cores.
2. The battery of claim 1, wherein the wick comprises:
the two winding cores are respectively contacted with two sides of the vertical part correspondingly;
the first horizontal part is arranged on the lower surface of the vertical part, and the lower surface of the winding core is contacted with the horizontal part.
3. The battery of claim 2, wherein the wick further comprises:
the second horizontal part is arranged on the upper surface of the vertical part, and the upper surface of the winding core is contacted with the horizontal part.
4. A battery according to any one of claims 1 to 3, wherein the wick is made of an intumescent material.
5. A battery according to any one of claims 1 to 3, wherein a plurality of said winding cores are provided, a plurality of said liquid absorbing members are provided, and said liquid absorbing members are provided between adjacent two of said winding cores.
6. A battery according to any one of claims 1 to 3, wherein the inner wall of the housing is provided with an insulating heat conducting layer.
7. The battery of claim 6, wherein the insulating thermally conductive layer is formed by a spray coating process.
8. A battery according to any one of claims 1 to 3, further comprising a top cover connected to the housing for sealing the winding core.
9. A battery module comprising a plurality of the batteries according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321570873.7U CN220253440U (en) | 2023-06-16 | 2023-06-16 | Battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321570873.7U CN220253440U (en) | 2023-06-16 | 2023-06-16 | Battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220253440U true CN220253440U (en) | 2023-12-26 |
Family
ID=89235213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321570873.7U Active CN220253440U (en) | 2023-06-16 | 2023-06-16 | Battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220253440U (en) |
-
2023
- 2023-06-16 CN CN202321570873.7U patent/CN220253440U/en active Active
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