CN220021322U - Power battery shell, battery pack and vehicle - Google Patents
Power battery shell, battery pack and vehicle Download PDFInfo
- Publication number
- CN220021322U CN220021322U CN202321515243.XU CN202321515243U CN220021322U CN 220021322 U CN220021322 U CN 220021322U CN 202321515243 U CN202321515243 U CN 202321515243U CN 220021322 U CN220021322 U CN 220021322U
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- face
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- heat
- side face
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- 238000000576 coating method Methods 0.000 claims abstract description 111
- 239000011248 coating agent Substances 0.000 claims abstract description 108
- 239000012720 thermal barrier coating Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 12
- 239000011810 insulating material Substances 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 description 16
- 238000000016 photochemical curing Methods 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- -1 modified acrylic ester Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Classifications
-
- 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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- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model belongs to the technical field of battery shells, and particularly relates to a power battery shell, a battery pack and a vehicle. The power battery shell comprises a shell body and a functional coating; the shell body comprises a first end face, a second end face, a first side face, a second side face, a first large face and a second large face; the functional coating comprises an insulating coating, an insulating heat-insulating coating and an insulating heat-conducting coating, wherein the insulating coating covers the first end face, the second end face and the first side face, the insulating heat-insulating coating covers the first large face and the second large face, and the insulating heat-conducting coating covers the second side face. According to the utility model, the functions of the coating are diversified, the insulating heat-conducting coating has a heat-conducting effect, the heat dissipation of the power battery is facilitated, the insulating heat-insulating coating has a heat-insulating effect, and a heat-insulating material is not required to be arranged between large surfaces of adjacent power batteries, so that the use of the heat-insulating material is reduced, and the use cost of the material is reduced.
Description
Technical Field
The utility model belongs to the technical field of battery shells, and particularly relates to a power battery shell, a battery pack and a vehicle.
Background
In the power battery, a layer of insulating film is coated and stuck on the outer surface of a battery shell to insulate and protect the power battery.
However, when the insulating film is coated, the outer surface of the battery case is difficult to cover completely, the coating effect is poor, moisture is easy to permeate, the viscosity of the insulating film is reduced, and the insulating film is at risk of warping at corner bending positions, so that insulation failure is caused. Furthermore, the insulating film has single function, only plays a role in insulating and protecting the battery shell, has no other additional functions, and after the power battery shell is coated with the insulating film, heat insulation materials are additionally used between large surfaces of adjacent power batteries in the battery pack to insulate heat, so that the use cost of the materials can be increased.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: aiming at the problems that the insulating film on the outer surface of the existing power battery shell is single in function and the use cost of materials can be increased, the power battery shell, a battery pack and a vehicle are provided.
In order to solve the technical problems, in one aspect, an embodiment of the present utility model provides a power battery housing, including a housing body and a functional coating;
the shell body is provided with a first end face, a second end face, a first side face, a second side face, a first large face and a second large face, wherein the first end face is opposite to the second end face, the first side face is opposite to the second side face, and the first large face is opposite to the second large face;
the functional coating comprises an insulating coating, an insulating heat-insulating coating and an insulating heat-conducting coating, wherein the insulating coating covers the first end face, the second end face and the first side face, the insulating heat-insulating coating covers the first large face and the second large face, and the insulating heat-conducting coating covers the second side face.
Optionally, the insulating coating includes a first insulating coating disposed on the first end face, a second insulating coating disposed on the second end face, and a third insulating coating disposed on the first side face.
Optionally, the thickness of the insulating coating is 100-120 μm.
Optionally, the insulating thermal barrier coating comprises a first thermal barrier coating disposed on the first major surface and a second thermal barrier coating disposed on the second major surface.
Optionally, the thickness of the insulating thermal insulation coating is 190-210 μm.
Optionally, the thickness of the insulating heat-conducting coating is 100-120 μm.
Optionally, the first end face and the second end face extend along a first direction and are oppositely disposed in a second direction, the first large face and the second large face extend along the second direction and are oppositely disposed in a third direction, and the first side face and the second side face extend along the second direction and are oppositely disposed in the first direction;
the first direction, the second direction and the third direction are perpendicular to each other.
In another aspect, embodiments of the present utility model provide a battery comprising a pole piece and a power battery housing as described above, the pole piece being disposed in the power battery housing.
In still another aspect, an embodiment of the present utility model provides a battery pack, including a liquid cooling plate and a plurality of batteries stacked as described above, where the second side surface abuts against the liquid cooling plate, and two adjacent batteries, where a first large surface of one of the batteries abuts against a second large surface of the other battery.
In yet another aspect, an embodiment of the present utility model provides a vehicle including a battery pack as previously described.
The power battery shell provided by the embodiment of the utility model has the advantages that the functional coating is formed on the shell body through coating, has good adhesive force with the shell body, has good coating effect, has good insulation protection effect, has diversified functions, has the heat conduction effect except insulation protection, is beneficial to heat dissipation of the power battery, has the heat insulation effect except insulation protection, does not need to be provided with heat insulation materials between large surfaces of adjacent power batteries, reduces the use cost of the heat insulation materials, and can also realize the integral light weight of the battery pack.
Drawings
FIG. 1 is an expanded schematic view of a power cell housing according to an embodiment of the present utility model;
fig. 2 is a schematic perspective view of a power battery housing according to an embodiment of the present utility model;
fig. 3 is a schematic view of a battery pack according to an embodiment of the present utility model.
Reference numerals in the specification are as follows:
11. a first end face; 111. a first edge; 112. a second edge; 113. a third edge; 114. a fourth edge; 12. a second end face; 121. a fifth edge; 122. a sixth edge; 123. a seventh edge; 124. an eighth edge; 21. a first side; 22. a second side; 31. a first major surface; 32. a second major surface; 4. a liquid cooling plate; 5. structural adhesive.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 2, a power battery housing according to an embodiment of the present utility model includes a housing body and a functional coating layer, where the functional coating layer is coated on the housing body. The housing body has a first end face 11, a second end face 12, a first side face 21, a second side face 22, a first large face 31 and a second large face 32, the first end face 11 and the second end face 12 are disposed opposite to each other, the first side face 21 and the second side face 22 are disposed opposite to each other, and the first large face 31 and the second large face 32 are disposed opposite to each other. The functional coating comprises an insulating coating, an insulating heat-insulating coating and an insulating heat-conducting coating, wherein the insulating coating is covered on the first end face 11, the second end face 12 and the first side face 21, the insulating coating plays a role in insulating and pressure resistance, the insulating heat-insulating coating is covered on the first large face 31 and the second large face 32, the insulating heat-insulating coating has a role in insulating and pressure resistance and heat insulation, the insulating heat-conducting coating is covered on the second side face 22, and the insulating heat-conducting coating has a role in insulating and pressure resistance and heat conduction.
The power battery shell provided by the embodiment of the utility model has the advantages that the functional coating is formed on the shell body through coating, has good adhesive force with the shell body, has good coating effect, has good insulation protection effect, has diversified functions, has the heat conduction effect except insulation protection, is beneficial to heat dissipation of the power battery, has the heat insulation effect except insulation protection, does not need to be provided with heat insulation materials between large surfaces of adjacent power batteries, reduces the use cost of the heat insulation materials, and can also realize the integral light weight of the battery pack.
In one embodiment, the power battery housing has a wide range of applications, and is suitable for batteries other than cylindrical batteries and soft pack batteries, such as prismatic batteries and blade batteries.
In an embodiment, as shown in fig. 1 and 2, the first end face 11 and the second end face 12 extend along a first direction and are oppositely disposed along a second direction, the first large face 31 and the second large face 32 extend along the second direction and are oppositely disposed along a third direction, the first side face 21 and the second side face 22 extend along the second direction and are oppositely disposed along the first direction, and the first direction, the second direction and the third direction are perpendicular to each other.
In a specific embodiment, as shown in fig. 2, the power battery is a blade battery, the power battery housing is a cube, the first end face 11 has a first edge 111, a second edge 112, a third edge 113 and a fourth edge 114 connected in sequence, the first edge 111 and the third edge 113 are disposed opposite each other, the second edge 112 and the fourth edge 114 are disposed opposite each other, the second end face 12 has a fifth edge 121, a sixth edge 122, a seventh edge 123 and an eighth edge 124 connected in sequence, the fifth edge 121 and the seventh edge 123 are disposed opposite each other, the sixth edge 122 and the eighth edge 124 are disposed opposite each other, the first side face 21 extends from the first edge 111 to the fifth edge 121, the second side face 22 extends from the third edge 113 to the seventh edge 123, the first large face 31 extends from the second edge 112 to the sixth edge 122, and the second large face 32 extends from the fourth edge 114 to the eighth edge 124.
In one embodiment, the first end face 11, the second end face 12 and the first side face 21 of the power battery shell are insulated and protected by an insulating coating, and the insulating coating has good insulation pressure resistance, electrolyte resistance and ageing resistance and good adhesive force and insulation protection effect. The insulating coating comprises a first insulating coating, a second insulating coating and a third insulating coating, wherein the first insulating coating is arranged on the first end face 11, the shape of the first insulating coating is matched with that of the first end face 11, the second insulating coating is arranged on the second end face 12, the shape of the second insulating coating is matched with that of the second end face 12, the third insulating coating is arranged on the first side face 21, and the shape of the third insulating coating is matched with that of the first side face 21.
In one embodiment, the thickness of the insulating coating is 100-120 μm, the insulating coating is a photo-cured insulating coating, and it is understood that the thicknesses of the first, second and third insulating coatings are 100-120 μm.
In an embodiment, the second side 22 of the power battery housing is coated with an insulating and heat conducting coating for insulation protection and heat conduction, the insulating and heat conducting coating has good insulation pressure resistance, electrolyte resistance, aging resistance and heat conducting properties, the second side 22 abuts against the liquid cooling plate 4 in the battery pack, and the heat conducting capability of the second side 22 is further improved by coating the insulating and heat conducting coating on the second side 22, so that the heat of the power battery housing can be more effectively transferred to the liquid cooling plate 4. The thickness of the insulating heat-conducting coating is 100-120 mu m, and the insulating heat-conducting coating is a photo-curing insulating heat-conducting coating.
In an embodiment, the first large surface 31 and the second large surface 32 of the power battery shell are insulated by adopting an insulating and heat-insulating coating, and the insulating and heat-insulating coating has good insulating and pressure-resistant, heat-insulating, electrolyte-resistant, high-temperature-resistant and aging-resistant performances, and can prevent heat conduction between large surfaces of adjacent batteries in the battery pack, and the heat of the power battery shell is transferred to the liquid cooling plate only through the second side surface 22, so that the constancy of the temperature of the power battery shell can be ensured, and the working temperature of the batteries can be kept. In addition, the insulating and heat-insulating coating is coated on the first large surface 31 and the second large surface 32, so that the use of heat-insulating materials can be reduced, and the cost reduction and the efficiency enhancement can be realized. The insulating thermal barrier coating includes a first thermal barrier coating layer disposed on the first large face 31 in a shape matching the shape of the first large face 31 and a second thermal barrier coating layer disposed on the second large face 32 in a shape matching the shape of the second large face 32.
In one embodiment, the thickness of the insulating thermal barrier coating is 190-210 μm, and the insulating thermal barrier coating is a photo-cured insulating thermal barrier coating, it being understood that the thickness of the first thermal barrier coating and the second thermal barrier coating are both 190-210 μm.
The existing power battery shell is insulated and protected by the pressure-sensitive adhesive insulating film, bubbles are easy to generate in the pasting process, the process yield is low, the insulating film and the power battery shell are not integrated, and the large surface of the power battery shell is provided with multiple layers of overlapping, so that the cladding thickness is increased. In this embodiment, the thickness of the insulating coating, the insulating thermal insulating coating and the insulating heat conducting coating is smaller, and the thickness of the battery is not increased after the photo-curing and integrally formed on the housing body.
The coating process of the functional coating comprises the following steps:
a. the laser and plasma clean the power battery shell, and the surface energy of the power battery shell after cleaning is more than 40N/m.
b. The first end face 11, the second end face 12 and the first side face 21 of the power battery shell are sprayed with the photo-curing insulating paint for curing, and the thickness of the coating is controlled to be 100-120 mu m, so that the requirements of coating performance and limiting thickness are met.
The oligomer of the photo-curing insulating coating comprises modified acrylic ester, organic silicon resin and fluorocarbon resin, and specifically, the photo-curing insulating coating is subjected to high temperature and high humidity (the temperature is 85 ℃ and the humidity is 85%) for 1000 hours and is soaked in electrolyte for 15 days at normal temperature, and the insulating withstand voltage is less than or equal to 0.5mA (AC, 3KV and 60 s). The adhesion cross-hatch test for photo-cured insulating coatings was grade 0. The adhesive force is 0 grade by a cross-cut method test, which represents that the photo-cured insulating coating has stronger adhesive force.
c. The power battery shell is turned over, and the photo-curing insulating heat-conducting paint is sprayed on the second side 22 of the power battery shell, wherein the thickness of the coating is controlled to be 100-120 mu m, and the requirements on the coating performance and the limiting thickness are met.
The oligomer of the photo-curing insulating heat-conducting coating comprises modified acrylic ester, organic silicon resin and fluorocarbon resin, and specifically, the photo-curing insulating coating is subjected to high temperature and high humidity (the temperature is 85 ℃ and the humidity is 85%) for 1000 hours and is soaked in electrolyte for 15 days at normal temperature, and the insulating withstand voltage is less than or equal to 0.5mA (AC, 3KV and 60 s). The adhesion cross-cut test of the photo-cured insulating coating is 0 level, which means that the photo-cured insulating heat-conducting coating has stronger adhesion. The heat conductivity is 0.8W/(m.K), and the heat conductivity is good.
d. The photo-curing insulating paint is sprayed on the first large surface 31 and the second large surface 32 of the power battery shell, the thickness of the paint is controlled between 190 and 210 mu m, and the requirements of the paint performance and the limit thickness are met.
The oligomer of the photo-curing insulating thermal-insulating coating comprises organic silicon resin, organic-inorganic hybrid resin and fluorocarbon resin, and specifically, after the photo-curing insulating thermal-insulating coating is subjected to high temperature and high humidity (the temperature is 85 ℃ and the humidity is 85%) for 1000 hours, electrolyte is soaked for 15d at normal temperature and baked for 1 hour at the high temperature of 650 ℃, the insulating withstand voltage is less than or equal to 0.5mA (AC, 3KV and 60 s). The heat conductivity coefficient of the photo-curing insulating coating is less than or equal to 0.1W/(m.K), and the heat conductivity is poor. The adhesion cross-cut test of the photo-cured insulating heat-insulating coating is 0 grade, and the insulating heat-insulating coating has stronger adhesion.
e. The coating of the first large face 31, the second large face 32 and the second side face 22 of the power cell housing is photo-cured.
The adhesive force of the insulating coating, the insulating heat-insulating coating and the insulating heat-conducting coating is strong, so that the risk that the adhesion is reduced due to the fact that moisture is easily permeated into the existing insulating film, the risk of warping at the corner bending position and insulation failure are easily caused is avoided.
On the other hand, the embodiment of the present utility model provides a battery, including the pole core and the power battery housing of the above embodiment, the pole core is disposed in the power battery housing, specifically, the first end face 11, the second end face 12, the first side face 21, the second side face 22, the first large face 31 and the second large face 32 enclose an inner cavity, and the pole core is accommodated in the inner cavity. The first end face 11 or the second end face 12 is provided with a liquid injection port, a positive electrode, a negative electrode and an explosion-proof valve.
In another aspect, as shown in fig. 3, an embodiment of the present utility model provides a battery pack, including a liquid cooling plate 4 and a plurality of batteries of the above embodiments stacked and disposed, where the batteries are adhered to the liquid cooling plate 4 by a structural adhesive 5, the batteries are blade batteries, the existing insulating film is adhered to the power battery housing by a pressure sensitive adhesive, and the adhesive strength of the pressure sensitive adhesive is low, especially the shear strength and the pull strength, and the insulating film is easy to fall off, so that the adhesive strength between the power battery housing and the liquid cooling plate 4 is low.
The mounting modes of the batteries are the same, all the second side surfaces 22 are abutted against the liquid cooling plate 4, and the insulating heat conduction coating on the second side surfaces 22 further improves the heat conduction capacity of the second side surfaces 22 and the heat conduction structural adhesive 5, so that the heat of the power battery shell can be transferred to the liquid cooling plate 4 more effectively.
In two adjacent batteries, the first large surface 31 of one battery is abutted with the second large surface 32 of the other battery, and the insulating and heat-insulating coating integrates the functions of an insulating film and a heat-insulating material, so that the use of the heat-insulating material is reduced, the whole package is light in weight, the transverse space of the battery package is enlarged, the cost reduction and efficiency enhancement are realized, and the temperature of the power battery shell is further kept constant.
In yet another aspect, an embodiment of the present utility model provides a vehicle including the battery pack of the above embodiment.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The power battery shell is characterized by comprising a shell body and a functional coating;
the shell body is provided with a first end face, a second end face, a first side face, a second side face, a first large face and a second large face, wherein the first end face is opposite to the second end face, the first side face is opposite to the second side face, and the first large face is opposite to the second large face;
the functional coating comprises an insulating coating, an insulating heat-insulating coating and an insulating heat-conducting coating, wherein the insulating coating covers the first end face, the second end face and the first side face, the insulating heat-insulating coating covers the first large face and the second large face, and the insulating heat-conducting coating covers the second side face.
2. The power cell housing of claim 1, wherein the insulating coating comprises a first insulating coating disposed on the first end face, a second insulating coating disposed on the second end face, and a third insulating coating disposed on the first side face.
3. The power cell housing of claim 2, wherein the insulating coating has a thickness of 100 to 120 μm.
4. The power cell housing of claim 1, wherein the insulating thermal barrier coating comprises a first thermal barrier coating disposed on the first major surface and a second thermal barrier coating disposed on the second major surface.
5. The power cell housing of claim 4, wherein the insulating thermal barrier coating has a thickness of 190 to 210 μm.
6. The power cell housing of claim 1, wherein the insulating thermally conductive coating has a thickness of 100 to 120 μm.
7. The power cell housing of claim 1, wherein the first end face and the second end face extend in a first direction and are oppositely disposed in a second direction, the first large face and the second large face extend in the second direction and are oppositely disposed in a third direction, and the first side face and the second side face extend in the second direction and are oppositely disposed in the first direction;
the first direction, the second direction and the third direction are perpendicular to each other.
8. A battery comprising a pole piece and the power cell housing of any one of claims 1-7, the pole piece being disposed in the power cell housing.
9. A battery pack comprising a plurality of the batteries of claim 8 stacked together and a liquid cooling plate, wherein the second side surface abuts against the liquid cooling plate, and wherein the first large surface of one of the batteries abuts against the second large surface of the other battery in two adjacent batteries.
10. A vehicle comprising the battery pack of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321515243.XU CN220021322U (en) | 2023-06-14 | 2023-06-14 | Power battery shell, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321515243.XU CN220021322U (en) | 2023-06-14 | 2023-06-14 | Power battery shell, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220021322U true CN220021322U (en) | 2023-11-14 |
Family
ID=88686104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321515243.XU Active CN220021322U (en) | 2023-06-14 | 2023-06-14 | Power battery shell, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220021322U (en) |
-
2023
- 2023-06-14 CN CN202321515243.XU patent/CN220021322U/en active Active
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