CN219476767U - Battery and electric equipment - Google Patents
Battery and electric equipment Download PDFInfo
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- CN219476767U CN219476767U CN202320559290.8U CN202320559290U CN219476767U CN 219476767 U CN219476767 U CN 219476767U CN 202320559290 U CN202320559290 U CN 202320559290U CN 219476767 U CN219476767 U CN 219476767U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a battery and electric equipment, wherein the battery comprises a shell, at least one electric core, electrolyte and a liquid-retaining layer, one end of the shell is opened, and the shell is provided with an accommodating cavity; at least one battery cell is accommodated in the accommodating cavity of the shell; electrolyte is contained in the containing cavity of the shell; the liquid-retaining layer is accommodated in the accommodating cavity of the shell, and is arranged on the first end surface of the shell far away from the opening and is contacted with the bottom surface of each battery cell; the liquid-retaining layer is in contact with a second end surface portion of the electrolyte deposit, which is close to the opening, so that a battery cell, which is far away from the second end surface, in the casing can be in contact with the electrolyte absorbed by the liquid-retaining layer. According to the utility model, the liquid-retaining layer is arranged at the bottom of the battery shell far away from the top cover, so that when the battery cells lie flat, the battery cells positioned at the upper side in the shell can be contacted with electrolyte absorbed by the liquid-retaining layer at the bottom, thereby improving the dynamic performance and the cycle performance of the lying battery cells and prolonging the service life of the battery cells.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery and electric equipment.
Background
The battery cell comprises a positive pole piece, a negative pole piece, electrolyte and an isolating film, and the battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece for working. Wherein the material of the separator/separator can be selected from the group consisting of PP (polypropylene) or PE (polyethylene), and copolymers of polypropylene and polyethylene, and combinations thereof. The separator/separator is for ensuring insulation between the positive electrode and the negative electrode while allowing movement of charge carriers between these electrodes, and is composed of a strip-shaped sheet material having a predetermined width and having a plurality of micropores, and a microporous resin film, for example, a microporous film formed of a polyolefin resin, may be used, and the microporous film may have a single-layer structure or a laminated structure.
The most obvious benefit of the conversion is that the vertical height of the battery pack is obviously reduced, more space in the vehicle can be released for passengers, and the trafficability of the chassis can be ensured. However, the main problem faced by this technology is that the upper cell in the aluminum case cannot contact the electrolyte at the bottom, and insufficient absorption or contact of the electrolyte by the cell can lead to lithium precipitation, which can lead to degradation of the dynamic performance and cycle performance of the battery.
Therefore, how to improve the problem that the upper cell in the aluminum battery can not contact the electrolyte at the bottom, thereby improving the dynamic performance and the cycle performance of the battery, has become a technical problem to be solved in the present day.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the technical defect that the battery core positioned above in the battery aluminum shell cannot contact the electrolyte at the bottom in the prior art.
To solve the above technical problem, in a first aspect, the present utility model provides a battery, including:
a shell with one end open, wherein the shell is provided with an accommodating cavity;
at least one battery cell accommodated in the accommodating cavity of the shell;
electrolyte, it accommodates in the accommodating cavity of the said body;
the liquid-retaining layer is accommodated in the accommodating cavity of the shell, is arranged on the first end face of the shell far away from the opening and is in contact with the bottom face of each battery cell;
the electrolyte-retaining layer is in contact with a second end face portion, close to the opening, of the electrolyte deposit, so that a battery cell, away from the second end face, in the shell can be in contact with the electrolyte absorbed by the electrolyte-retaining layer.
In one embodiment of the present utility model, the liquid-retaining layer is further disposed on at least one third end surface adjacent to the second end surface, so that the liquid-retaining layer contacts a side surface of the electrical core.
In one embodiment of the utility model, the liquid-retaining layer is formed with at least one abutting portion, and the abutting portion is in contact with the winding portion of the battery cell.
In one embodiment of the utility model, the abutment is complementary to the structure of the winding.
In one embodiment of the present utility model, the liquid-retaining layer further includes a protrusion disposed between adjacent abutting portions, the abutting portions abutting the winding portions and filling the arc-shaped space between the adjacent winding portions with the protrusion.
In one embodiment of the present utility model, the thickness of the liquid-retaining layer disposed on the first end surface is greater than the thickness of the liquid-retaining layer disposed on the third end surface.
In one embodiment of the present utility model, the liquid-retaining layer includes at least two barrier film layers, and the number of the barrier film layers is 5-8.
In one embodiment of the present utility model, the barrier film layer includes a first ceramic layer, a first polyvinylidene fluoride layer, a base film, a second polyvinylidene fluoride layer, and a second ceramic layer, which are sequentially disposed.
In one embodiment of the utility model, the first ceramic layer and/or the second ceramic layer is nano-scale aluminum oxide.
In a second aspect, the present utility model also provides an electrical device comprising a battery as described above.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
according to the battery and the electric equipment, the liquid-retaining layer is arranged at the bottom of the battery shell far away from the top cover, so that the battery core positioned at the upper side in the shell can be contacted with electrolyte absorbed by the liquid-retaining layer at the bottom when the battery core is lying flat, the dynamic performance and the circulating performance of the lying battery core can be improved, and the service life of the battery core is prolonged.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a schematic view of a structure of a first embodiment of a battery of the present utility model.
Fig. 2 is a schematic structural view of a second embodiment of the battery of the present utility model.
Fig. 3 is a schematic view of a third embodiment of the battery of the present utility model.
Fig. 4 is another structural schematic diagram of a third embodiment of the battery of the present utility model.
Fig. 5 is a schematic view showing an electrolyte infiltration state when the battery cell is lying in a flat state in the third embodiment of the battery of the present utility model.
Fig. 6 is a schematic structural view of a fourth embodiment of the battery of the present utility model.
Fig. 7 is a schematic view of a fifth embodiment of the battery of the present utility model.
Fig. 8 is a schematic diagram of another structure of the holding portion holding the battery cell in the fifth embodiment of the battery of the present utility model.
Description of the specification reference numerals: 1. a housing; 11. a housing chamber; 12. a first end face; 13. a second end face; 14. a third end face; 2. a battery cell; 3. a liquid-retaining layer; 31. an isolation film layer; 311. a first ceramic layer; 312. a first polyvinylidene fluoride layer; 313. a base film; 314. a second polyvinylidene fluoride layer; 315. a second ceramic layer; 32. a holding portion; 33. a convex portion; 4. and a top cover.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
The utility model provides a battery and electric equipment, wherein a liquid-retaining layer 3 is arranged at the bottom of a battery shell 1 far away from a top cover 4, so that a battery cell 2 positioned at the upper side in the shell 1 can be contacted with electrolyte absorbed by the liquid-retaining layer 3 at the bottom, thereby improving the dynamic performance and the cycle performance of the lying battery cell 2 and prolonging the service life of the battery cell 2. In the present embodiment, the directional terms mentioned in the description are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the utility model. The top cap 4 of battery is used for closing the battery casing, and its one side that corresponds with top cap 4 is the bottom, and when the battery was lying as shown in fig. 1, top cap 4 and bottom vertical setting, electric core 2 set up along the horizontal direction, and when electric core 2 had a plurality of, it was in the battery casing 1 of showing in vertical direction range upon range of setting, and electric core 2 that is located the upside refers to electric core 2 that is located the top as shown in fig. 5.
The electric equipment provided by the embodiment of the utility model comprises a battery. The electric equipment can be an automobile, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric equipment in particular.
The battery of the embodiment of the utility model comprises a shell 1, a battery cell 2 and a top cover assembly, wherein the top cover assembly seals an opening of the shell 1, a containing cavity 11 is formed between the top cover assembly and the shell 1, and the battery cell 2 is arranged in the containing cavity 11. The battery cell 2 is a winding battery cell, and the winding axis of the winding battery cell is arranged in the accommodating cavity 11 along the horizontal direction.
The housing 1 according to the embodiment of the present utility model may be a hollow structure with one side open, or may be a hollow structure with two sides open. The housing 1 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.
The battery cell 2 of the embodiment of the utility model comprises a positive electrode plate, a negative electrode plate and an isolating film which are arranged in a stacked manner. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene). In this embodiment, the winding bottom surface of the battery cell 2 contacts the bottom surface of the battery case 1, the winding side surface contacts the side surface of the battery case 1, when the battery is vertical, the winding shaft of the battery cell 2 is also vertically disposed, the electrolyte contained in the battery case 1 is deposited on the bottom surface of the battery case 1, and the electrolyte can infiltrate each battery cell 2 through the winding bottom surface, however, when the battery is lying down, the winding shaft of the battery cell 2 is horizontally disposed, the electrolyte in the battery case 1 is deposited on the side surface of the battery case 1, and at this time, the electrolyte only contacts the battery cell 2 below the height thereof, but cannot infiltrate the battery cell 2 above the height of the electrolyte. Based on this, this application provides a battery, can effectively solve the battery and lie when lying flat and place, and the problem that the electrolyte infiltration of electric core 2 is not enough.
For convenience of explanation, the following examples will take a battery according to an embodiment of the present utility model as an example.
Example 1
Referring to fig. 1, the present utility model provides a battery, which structurally comprises a housing 1, at least one cell 2, an electrolyte and a liquid-retaining layer 3, wherein one end of the housing 1 is opened, and the housing 1 has a housing cavity 11; at least one battery cell 2 is accommodated in the accommodating cavity 11 of the shell 1; electrolyte is contained in the containing cavity 11 of the shell 1; the liquid-retaining layer 3 is accommodated in the accommodating cavity 11 of the shell 1, and the liquid-retaining layer 3 is arranged on the first end face 12 of the shell 1 far away from the opening and is contacted with the bottom face of each cell 2; wherein, the liquid-retaining layer 3 is contacted with the second end face 13 of the electrolyte deposit, which is close to the opening, so that the battery cell 2, which is far away from the second end face 13, in the shell 1 can contact the electrolyte absorbed by the liquid-retaining layer 3. It should be noted that, the bottom surface of the battery core 2 is a winding bottom surface, all the isolating films are exposed on the winding bottom surface, and the winding bottom surface is in contact with the first end surface 12 provided with the liquid-retaining layer 3, so that each isolating film of the battery core 2 can be contacted with the first end surface 12, and each isolating film can be soaked by electrolyte.
The liquid-retaining layer 3 contacts with the bottom surface (i.e. the first end surface 12) of the battery case 1, when the electric core 2 lies flat, the liquid-retaining layer 3 contacts with the second end surface 13 of the electrolyte deposit, which is close to the opening of the case 1 (a small amount of electrolyte is deposited in the case 1), at this time, the electrolyte extends from the second end surface 13 to the first end surface 12, i.e. a liquid-climbing channel extending from bottom to top is formed on the bottom surface of the case 1, so that the wetting speed and wetting range of the electrolyte can be improved, and a better liquid-climbing effect is achieved, so that the electric core 2, which is far away from the second end surface 13, in the case 1 can absorb the electrolyte by contacting with the liquid-retaining layer 3.
The battery provided by the above solves the technical defect that the battery cell 2 positioned above the existing battery cell 2 can not be contacted with electrolyte when lying flat, and the battery cell 2 positioned on the upper side in the battery cell 1 can be contacted with electrolyte absorbed by the bottom liquid-retaining layer 3 when lying flat by arranging the liquid-retaining layer 3 at the bottom of the battery cell 1 far away from the top cover 4, so that the dynamic performance and the cycle performance of the lying battery cell 2 can be improved, and the service life of the battery cell 2 is prolonged.
Wherein, above-mentioned liquid-retaining layer 3 includes two-layer at least barrier film layer 31, and liquid-retaining layer 3 comprises two-layer at least barrier film layer 31 promptly, and the barrier film has better absorption effect to electrolyte to the barrier film has better stock solution effect to electrolyte equally, and liquid-retaining layer 3 all contacts with all electric core 2, so can make electric core 2 that lie in the upside in casing 1 can contact the absorbent electrolyte of bottom liquid-retaining layer 3, improves the electrolyte infiltration effect. Preferably, the number of the layers of the isolation film layer 31 is preferably 5-8, so that the liquid-retaining layer 3 has better liquid absorption and liquid-retaining effects than the isolation film in the cell 2. In the production process, the isolation film layer 31 is laminated and attached to the bottom surface of the casing 1.
Example two
Based on the first embodiment, each isolation film 31 of the present utility model includes, in order from top to bottom, a first ceramic layer 311, a first polyvinylidene fluoride layer 312, a base film 313, a second polyvinylidene fluoride layer 314, and a second ceramic layer 315; the first ceramic layer 311 and/or the second ceramic layer 315 are nano-scale aluminum oxide, i.e. the two sides of each isolation film 31 are coated with nano-scale aluminum oxide, which has large specific surface area and high porosity, so as to improve the infiltration effect. Preferably, the size of the alumina particles (ceramic) coated on each isolation film layer 31 is 20-30 nm, the specific surface area is 170-185 m2/g, the porosity is 80% -90%, and the alumina particles have good wettability, liquid absorption and liquid retention capacity, so that the battery cell 2 positioned above in the shell can be contacted with electrolyte when the battery cell 2 is lying flat, the dynamic performance and the cycle performance of the lying battery cell 2 are improved, and the service life of the battery cell 2 is prolonged.
In order to reduce weight and cost, only one side of the isolating film in the battery cell 2 is coated with ceramic. The polyvinylidene fluoride layer is to bond the base film 313 and the separator together, prevent the base film from being deformed, and improve the interface.
Example III
Based on the first embodiment and the second embodiment, the liquid-retaining layer 3 of the present utility model is further disposed on at least one third end surface 14 adjacent to the second end surface 13, and the liquid-retaining layer 3 contacts with the side surface of the battery cell 2. The liquid-retaining layer 3 arranged on the third end face 14 can remarkably increase the contact area between the liquid-retaining layer 3 and the battery cells 2, so that the liquid-climbing effect of the electrolyte can be further improved, the battery cells 2 positioned on the upper side in the shell 1 can be contacted with more electrolyte absorbed by the liquid-retaining layer 3, and the electrolyte can infiltrate all the battery cells 2.
As a preferred embodiment, the liquid-retaining layer 3 may be disposed on the first end face 12 and the third end faces 14 on both sides of the housing 1, and this structure maximizes the contact area between the liquid-retaining layer 3 and the battery cells 2, so that the battery cells 2 located on the upper side in the housing 1 can contact the electrolyte absorbed by the liquid-retaining layer 3, so that the electrolyte can infiltrate all the battery cells 2. The liquid-retaining layers 3 on the third end surfaces 14 on the two sides have certain fluffiness, so that the battery cell 2 can be ensured to have a certain expansion space near the third end surfaces.
It should be noted that, the liquid-retaining layer 3 may also be disposed on the first end face 12 and the third end face 14 on one side of the casing 1, and this structure still enables the battery cell 2 located on the upper side in the casing 1 to be contacted with the electrolyte absorbed by the liquid-retaining layer 3, which is not limited in this utility model.
Example IV
The thickness of the liquid-retaining layer 3 arranged on the first end surface 12 is larger than that of the liquid-retaining layer 3 arranged on the third end surface 14. Preferably, the number of the layers of the isolation film layer 31 of the liquid-retaining layer 3 disposed on the first end face 12 is preferably 5-8, for example, the number of the layers of the isolation film layer 31 is 5, and the thickness of the 5 layers of the isolation film layer 31 may be 19um, so that the liquid-retaining layer 3 has better liquid absorption and retention effects than the isolation film in the cell 2, and the climbing capacity can be significantly increased.
Example five
Based on the third embodiment, the liquid-retaining layer 3 provided on the third end surface 14 of the present utility model is formed with at least one holding portion 32, and the holding portion 32 is in contact with the winding portion of the battery cell 2. The abutting portions 32 are groove-shaped, a convex portion 33 is arranged between adjacent abutting portions 32, as shown in fig. 5, the electric core 2 is provided with arc-shaped winding portions in the direction corresponding to the third end face 14 after lying flat, the arc-shaped winding portions protrude out of the electric core 2 body and form arc-shaped spaces between two adjacent arc-shaped winding portions, and in order to improve the infiltration effect, the abutting portions 32 and the convex portions 33 are arranged, so that the abutting portions 32 abut against the winding portions, and meanwhile the arc-shaped spaces between the adjacent winding portions are filled through the convex portions 33, so that the contact area between the liquid retaining layer 3 and the winding portions is improved. Optionally, referring to fig. 7, in order to improve the production efficiency, the supporting portion 32 is a planar groove, which is sequentially arranged on the liquid-retaining layer 3, each supporting portion 32 corresponds to a winding portion, and the arc space of the adjacent winding portion corresponds to a convex portion, so that the supporting portion 32 and the convex portion 33 can be extruded to increase the contact area between each cell 2 and the liquid-retaining layer 3, thereby improving the infiltration effect.
As a preferred feature, referring to fig. 8, the abutting portion 32 is complementary to the structure of the winding portion, and since the winding portion is an arc-shaped protrusion, the abutting portion 32 is configured as an arc-shaped groove structure provided on the liquid-retaining layer 3, that is, a plurality of arc-shaped grooves provided along the first direction of the liquid-retaining layer 3 are provided on the surface of the liquid-retaining layer 3, and two ends of the arc-shaped grooves respectively extend along the second direction of the liquid-retaining layer 3, wherein the first direction of the liquid-retaining layer 3 is perpendicular to the second direction. The number of the arc-shaped grooves corresponds to that of the battery cells 2, the cross sections of the arc-shaped grooves are in complete contact with the winding parts of the battery cells 2, namely, the shapes of the contact surfaces are complementary, the contact area between the liquid retaining layer 3 and the winding parts is further increased, the wetting effect of electrolyte is improved, and the problem that the liquid climbing capacity of the side surfaces of the battery cells is low is solved. And the arc-shaped groove can also support against the battery cell 2 to reduce the transverse vibration of the battery cell 2, thereby having better positioning effect on the battery cell 2.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A battery, characterized in that: comprising the following steps:
a shell with one end open, wherein the shell is provided with an accommodating cavity;
at least one battery cell accommodated in the accommodating cavity of the shell;
electrolyte, it accommodates in the accommodating cavity of the said body;
the liquid-retaining layer is accommodated in the accommodating cavity of the shell, is arranged on the first end face of the shell far away from the opening and is in contact with the bottom face of each battery cell;
the electrolyte-retaining layer is in contact with a second end face portion, close to the opening, of the electrolyte deposit, so that a battery cell, away from the second end face, in the shell can be in contact with the electrolyte absorbed by the electrolyte-retaining layer.
2. A battery according to claim 1, wherein: the liquid-retaining layer is further arranged on at least one third end face adjacent to the second end face, so that the liquid-retaining layer is in contact with the side face of the battery cell.
3. A battery according to claim 2, wherein: the liquid-retaining layer is formed with at least one supporting portion, and the supporting portion is contacted with the winding portion of the battery cell.
4. A battery according to claim 3, wherein: the abutment is complementary to the structure of the winding portion.
5. A battery according to claim 3, wherein: the liquid-retaining layer further comprises convex parts arranged between the adjacent abutting parts, the abutting parts abut against the winding parts, and arc-shaped spaces between the adjacent winding parts are filled through the convex parts.
6. A battery according to claim 2, wherein: the thickness of the liquid-retaining layer arranged on the first end face is larger than that of the liquid-retaining layer arranged on the third end face.
7. A battery according to claim 1, wherein: the liquid-retaining layer comprises at least two isolating film layers, and the number of the isolating film layers is 5-8.
8. A battery according to claim 7, wherein: the isolation film layer comprises a first ceramic layer, a first polyvinylidene fluoride layer, a base film, a second polyvinylidene fluoride layer and a second ceramic layer which are sequentially arranged.
9. A battery according to claim 8, wherein: the first ceramic layer and/or the second ceramic layer is nano-scale aluminum oxide.
10. An electrical consumer, characterized in that: a battery comprising a battery according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320559290.8U CN219476767U (en) | 2023-03-21 | 2023-03-21 | Battery and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320559290.8U CN219476767U (en) | 2023-03-21 | 2023-03-21 | Battery and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219476767U true CN219476767U (en) | 2023-08-04 |
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ID=87433907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320559290.8U Active CN219476767U (en) | 2023-03-21 | 2023-03-21 | Battery and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219476767U (en) |
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2023
- 2023-03-21 CN CN202320559290.8U patent/CN219476767U/en active Active
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