CN112060933A - Frame structure of power battery box - Google Patents
Frame structure of power battery box Download PDFInfo
- Publication number
- CN112060933A CN112060933A CN202010984395.9A CN202010984395A CN112060933A CN 112060933 A CN112060933 A CN 112060933A CN 202010984395 A CN202010984395 A CN 202010984395A CN 112060933 A CN112060933 A CN 112060933A
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- CN
- China
- Prior art keywords
- rib
- power battery
- frame
- battery box
- reinforcing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000011199 continuous fiber reinforced thermoplastic Substances 0.000 claims abstract description 14
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 10
- 239000011324 bead Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 8
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 2
- 239000002991 molded plastic Substances 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a frame structure of a power battery box body, which comprises a frame bottom surface and a side wall arranged around the bottom surface, wherein the frame bottom surface comprises a continuous fiber reinforced thermoplastic composite material bottom layer, the continuous fiber reinforced thermoplastic composite material bottom layer forms a transverse rib and a plurality of longitudinal ribs through mould pressing, the transverse rib and the longitudinal ribs divide the frame bottom surface into a plurality of reinforcing areas, at least one edge of each reinforcing area is an edge of the frame bottom surface, the continuous fiber reinforced thermoplastic composite material bottom layer of each reinforcing area forms a branch growing-shaped extending rib through mould pressing, the extending rib is provided with at least one branch, the starting end of the extending rib is positioned on the transverse rib, and the surface of a sunken area of each reinforcing area is formed into a honeycomb net through injection molding of a thermoplastic material. The invention combines the branch growing-shaped reinforcing structure of the continuous fiber reinforced thermoplastic composite material and the injection-molded honeycomb network reinforcing structure, so that the impact resistance and the bending resistance of the bottom surface of the frame structure of the power battery box body are improved.
Description
Technical Field
The invention relates to a battery box structure, in particular to a frame structure of a power battery box.
Background
At present, power battery box bodies of new energy automobiles are basically made of metal materials, and lightweight development of vehicles requires that parts of the vehicles are reduced by using metal parts. Therefore, the material replacement scheme of the power battery box needs to be considered, and the non-metal materials commonly used for vehicle light weight in the prior art are mainly fiber reinforced thermoplastic composite materials and pure thermoplastic materials, and the two materials have respective advantages and disadvantages: 1) the continuous fiber reinforced thermoplastic composite material has the characteristics of light weight, impact resistance and the like, but has poor rigidity; 2) thermoplastic materials have good stiffness but poor impact resistance. Because the power battery box has strict requirements on volume space, the two materials are used independently, and the structural strength of the power battery box does not have the capacity of bearing the power battery.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a frame structure of a power battery box, which solves the problem that the structural strength of the power battery box cannot meet the requirements of using lightweight materials.
The technical scheme of the invention is as follows: the utility model provides a frame construction of power battery box, includes the frame bottom surface and the lateral wall that sets up around the bottom surface, the frame bottom surface includes continuous fibers reinforcing thermoplasticity combined material bottom, continuous fibers reinforcing thermoplasticity combined material bottom forms a horizontal bead and a plurality of vertical bead through the mould pressing, horizontal bead with vertical bead will a plurality of reinforced areas are divided into to the frame bottom surface, every reinforced area's at least one side do the limit of frame bottom surface, every reinforced area continuous fibers reinforcing thermoplasticity combined material bottom forms the extension bead of branch growth form through the mould pressing, the extension bead is equipped with at least one branching, the initiating terminal of extension bead is located horizontal bead, every the sunken regional surface in reinforced area is moulded plastics by thermoplastic material and is formed the honeycomb net.
Furthermore, the extension bead comprises root bead, first branch bead and second branch bead, the initiating terminal of root bead is located horizontal bead, the initiating terminal of first branch bead is located the root bead, the initiating terminal of second branch bead is located first branch bead.
Further, the honeycomb net is not higher than the transverse ribs, the longitudinal ribs and the extending ribs.
Further, the total thickness of the bottom surface of the frame is not higher than 5mm, and the thickness of the bottom layer of the continuous fiber reinforced thermoplastic composite material is 1-2 mm.
Further, the side length of the hexagonal unit of the honeycomb network is 8-100 mm.
Furthermore, the side length of each reinforcing area is 300-1000 mm.
Furthermore, the width of horizontal bead and vertical bead is 30 ~ 200mm, the width of extending the bead is 20 ~ 100 mm.
Compared with the prior art, the invention has the advantages that: the impact resistance of the continuous fiber composite material and the stability of an injection molding structure are combined, the transverse convex ribs and the longitudinal convex ribs are used for partitioning the bottom surface, the branch-growing-shaped extending convex ribs are molded to form an impact-resistant net, and the honeycomb net injection molding reinforcing rib structure combined with the hexagonal units can fully meet the overall strength requirement, reduce the weight as much as possible and balance the light weight and the performance.
Drawings
Fig. 1 is a schematic diagram of a frame structure of a power battery box.
Fig. 2 is a schematic structural diagram of the bottom surface of the frame of the power battery box.
Fig. 3 is a partial sectional view of the bottom surface of the frame of the power battery box.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.
For better understanding of the present invention, please refer to fig. 1 to fig. 3, in which the frame structure of the power battery box according to the present embodiment includes a frame bottom surface 1 and a side wall 2 disposed around the frame bottom surface 1, the frame bottom surface 1 is made of a continuous fiber reinforced thermoplastic composite material and a thermoplastic material, and the side wall 2 is made of a thermoplastic material by injection molding, in the present embodiment, the continuous fiber reinforced thermoplastic composite material is continuous glass fiber reinforced PA6, and the thermoplastic material is PA6+30 GF.
The frame bottom surface 1 comprises a continuous fiber reinforced thermoplastic composite material bottom layer 11, and the thickness of the continuous fiber reinforced thermoplastic composite material bottom layer 11 is 1 mm. The continuous fiber reinforced thermoplastic composite material bottom layer 11 is formed into a transverse rib 111 and a plurality of longitudinal ribs 112 through mould pressing, wherein the transverse rib 111 is located at the central axis position of the frame bottom surface 1, the width of the transverse rib 111 is 120mm, the height of the transverse rib is 4mm, the longitudinal ribs 112 vertically staggered with the transverse rib 111 are uniformly arranged at intervals in the length direction of the frame bottom surface 1, the width of the longitudinal ribs 112 is 80mm, the height of the longitudinal ribs is 4mm, and the total thickness of the frame bottom surface 1 is 5 mm.
The transverse ribs 111 and the longitudinal ribs 112 divide the frame bottom 1 into a plurality of reinforcing regions 12, and the side length of each reinforcing region 12 is kept within 300 mm. One side of each reinforcing region 12 is the side of the bottom surface 1 of the frame, and the reinforcing regions 12 at the four corners are the adjacent two sides of the bottom surface 1 of the frame. The continuous fiber reinforced thermoplastic composite bottom layer 1 in each reinforcing region 12 is also molded to form dendritic elongated ribs. The extending rib is composed of a root rib 113, a first branch rib 114 and a second branch rib 115, the starting end of the root rib 113 is located on the transverse rib 111, the starting end of the first branch rib 114 is located on the root rib 113, and the starting end of the second branch rib 115 is located on the first branch rib 114. The ends of the root fin 113, the first branch fin 114, and the second branch fin 115 are not in contact with other fin structures. In this embodiment, the root rib 113 is perpendicular to the transverse rib 111, the first branch rib 114 is perpendicular to the root rib 113, and the second branch rib 115 is perpendicular to the first branch rib 114. it should be noted that angles other than a right angle may be formed between the root rib 113 and the transverse rib 111, between the first branch rib 114 and the root rib 113, and between the second branch rib 115 and the first branch rib 114. Generally, the width of the root rib 113, the width of the first branch rib 114, and the width of the second branch rib 115 are gradually reduced and the height is not changed, in this embodiment, the width of the root rib 113 is 80mm, the width of the first branch rib 114 is 60mm, the width of the second branch rib 115 is 40mm, and the height of the root rib 113, the height of the first branch rib 114, and the height of the second branch rib 115 are all 4mm, which is the same as the height of the longitudinal rib 112 and the height of the transverse rib 111. The surface of the other depressed areas in each reinforcing section 12, excluding the longitudinal ribs 112, the transverse ribs 111, and the elongated ribs, is injection molded from a thermoplastic material to form the honeycomb network 13. The honeycomb network 13 is composed of continuous adjacent hexagonal units, the length of each hexagonal unit is 8-100 mm, and the height of the honeycomb network 13 is 4mm, so that the flatness of the bottom surface of the frame is guaranteed.
The mode is the inherent vibration characteristic of the structural system, which reflects the frequency at which the structure resonates under external influence, and usually there are several different resonant frequencies from low to high, wherein the lowest resonant frequency is the first-order mode. It is known that resonance can damage the structure, and the lowest resonance frequency of the structure, namely the first-order overall mode, is found through mode analysis, and the result value is larger, which indicates that the higher the frequency of resonance generation is, the less easy the resonance generation is, and the corresponding rigidity is higher. The frame structure of the embodiment has the weight of 30kg, the first-order integral mode of 50.71Hz, and the values of collision and impact stress are both smaller than the tensile strength of the material. The frame structure of the power battery box body made of single thermoplastic material in the same volume through injection molding has the weight of 40kg, the first-order integral mode of 48.64Hz, the first-order integral mode of the frame of the flat-bottom power battery box body made of single continuous fiber reinforced thermoplastic composite material is 17.11Hz, and the values of collision and impact stress are smaller than the tensile strength of the material. The frame structure of the aluminum alloy power battery box body with the same volume has the weight of 70kg, the first-order integral mode is more than 50Hz, and the values of collision and impact stress are both smaller than the tensile strength of the material.
Claims (7)
1. The utility model provides a frame construction of power battery box, its characterized in that, includes the frame bottom surface and the lateral wall that sets up around the bottom surface, the frame bottom surface includes continuous fibers reinforcing thermoplasticity combined material bottom, continuous fibers reinforcing thermoplasticity combined material bottom forms a horizontal bead and a plurality of vertical bead through the mould pressing, horizontal bead with vertical bead will the frame bottom surface is divided into a plurality of reinforcing areas, every at least one side in reinforcing area is the limit of frame bottom surface, every reinforcing area the continuous fibers reinforcing thermoplasticity combined material bottom forms the extension bead of branch growth form through the mould pressing, the extension bead is equipped with at least one branching, the initiating terminal of extension bead is located horizontal bead, every the sunken regional surface in reinforcing area is moulded plastics by thermoplastic material and is formed the honeycomb net.
2. The frame structure of a power battery case according to claim 1, wherein the extension rib is composed of a root rib, a first branch rib and a second branch rib, the starting end of the root rib is located on the transverse rib, the starting end of the first branch rib is located on the root rib, and the starting end of the second branch rib is located on the first branch rib.
3. The frame structure of a power battery box body of claim 1, wherein the honeycomb network has a height no higher than the transverse ribs, the longitudinal ribs and the elongated ribs.
4. The frame structure of a power battery box body as claimed in claim 1, wherein the total thickness of the bottom surface of the frame is not higher than 5mm, and the thickness of the continuous fiber reinforced thermoplastic composite material bottom layer is 1-2 mm.
5. The frame structure of a power battery box body as claimed in claim 1, wherein the hexagonal cells of the honeycomb network have a side length of 8-100 mm.
6. The frame structure of a power battery box body as claimed in claim 1, wherein the side length of each reinforcing area is 300-1000 mm.
7. The frame structure of a power battery box body as claimed in claim 1, wherein the width of the transverse ribs and the width of the longitudinal ribs are 30-200 mm, and the width of the extending ribs is 20-100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010984395.9A CN112060933A (en) | 2020-09-18 | 2020-09-18 | Frame structure of power battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010984395.9A CN112060933A (en) | 2020-09-18 | 2020-09-18 | Frame structure of power battery box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112060933A true CN112060933A (en) | 2020-12-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010984395.9A Pending CN112060933A (en) | 2020-09-18 | 2020-09-18 | Frame structure of power battery box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112060933A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012018797A (en) * | 2010-07-07 | 2012-01-26 | Toray Ind Inc | Case and manufacturing method thereof |
| CN103325963A (en) * | 2012-03-23 | 2013-09-25 | 现代自动车株式会社 | Battery pack case assembly for vehicles using a plastic composite and method for manufacturing the same |
| CN107331802A (en) * | 2017-06-19 | 2017-11-07 | 惠州市海龙模具塑料制品有限公司 | Battery case and its manufacture method |
| CN107946488A (en) * | 2017-11-16 | 2018-04-20 | 北京航空航天大学 | Composite material battery case and preparation process based on continuous fiber Yu long fibre hybrid design |
| GB201808031D0 (en) * | 2017-05-18 | 2018-07-04 | Bae Systems Plc | Stiffening structure for an aircraft door or panel |
| CN208806285U (en) * | 2018-10-09 | 2019-04-30 | 重庆长安新能源汽车科技有限公司 | A kind of lightweight power battery cabinet |
| CN110350119A (en) * | 2019-06-17 | 2019-10-18 | 清华大学苏州汽车研究院（相城） | A kind of Battery case and battery case |
| CN210760635U (en) * | 2019-06-28 | 2020-06-16 | 凌云工业股份有限公司上海凌云汽车研发分公司 | Fiber reinforced thermoplastic composite material energy absorption box |
| CN210926104U (en) * | 2019-12-09 | 2020-07-03 | 惠州市海龙模具塑料制品有限公司 | Lightweight power battery box |
| CN111439106A (en) * | 2020-05-08 | 2020-07-24 | 上海瓴荣材料科技有限公司 | Battery box that metal and combined material combine |
-
2020
- 2020-09-18 CN CN202010984395.9A patent/CN112060933A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012018797A (en) * | 2010-07-07 | 2012-01-26 | Toray Ind Inc | Case and manufacturing method thereof |
| CN103325963A (en) * | 2012-03-23 | 2013-09-25 | 现代自动车株式会社 | Battery pack case assembly for vehicles using a plastic composite and method for manufacturing the same |
| GB201808031D0 (en) * | 2017-05-18 | 2018-07-04 | Bae Systems Plc | Stiffening structure for an aircraft door or panel |
| CN107331802A (en) * | 2017-06-19 | 2017-11-07 | 惠州市海龙模具塑料制品有限公司 | Battery case and its manufacture method |
| CN107946488A (en) * | 2017-11-16 | 2018-04-20 | 北京航空航天大学 | Composite material battery case and preparation process based on continuous fiber Yu long fibre hybrid design |
| CN208806285U (en) * | 2018-10-09 | 2019-04-30 | 重庆长安新能源汽车科技有限公司 | A kind of lightweight power battery cabinet |
| CN110350119A (en) * | 2019-06-17 | 2019-10-18 | 清华大学苏州汽车研究院（相城） | A kind of Battery case and battery case |
| CN210760635U (en) * | 2019-06-28 | 2020-06-16 | 凌云工业股份有限公司上海凌云汽车研发分公司 | Fiber reinforced thermoplastic composite material energy absorption box |
| CN210926104U (en) * | 2019-12-09 | 2020-07-03 | 惠州市海龙模具塑料制品有限公司 | Lightweight power battery box |
| CN111439106A (en) * | 2020-05-08 | 2020-07-24 | 上海瓴荣材料科技有限公司 | Battery box that metal and combined material combine |
Non-Patent Citations (1)
| Title |
|---|
| 张东兴、黄龙男: "《聚合物基复合材料科学与工程》", vol. 1, 30 June 2017, 哈尔滨工业大学出版社, pages: 354 - 363 * |
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