CN211350776U - Light-weight power battery lower box body - Google Patents
Light-weight power battery lower box body Download PDFInfo
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- CN211350776U CN211350776U CN202020374324.2U CN202020374324U CN211350776U CN 211350776 U CN211350776 U CN 211350776U CN 202020374324 U CN202020374324 U CN 202020374324U CN 211350776 U CN211350776 U CN 211350776U
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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
Abstract
The utility model provides a box under light weight type power battery, it includes: a base body, a liquid cooling plate and a bearing tray; one side of base member is formed with the assembly die cavity, and the base member is including range upon range of setting: first composite bed, middle filling layer and second composite bed, it is first, the second composite bed is formed by a plurality of cell layer complex, middle filling layer is the PET stereoplasm foaming layer, the liquid cooling board is installed in the assembly die cavity, fixed beam assembly still has on the liquid cooling board, the bearing tray passes through viscose and bolt mounting in the another side of base member, one side of liquid cooling board is provided with two water inlets, the opposite side is provided with a delivery port, the runner that is linked together with two water inlets and a delivery port is evenly arranged in the liquid cooling board. The utility model discloses a lower box adopts the PET stereoplasm foaming layer as the lightweight intermediate level, is favorable to alleviateing the weight of box. Simultaneously, the structure to base member, liquid cooling plate, bearing tray designs, has promoted the intensity of box under the power battery to make it have better homothermal behavior.
Description
Technical Field
The utility model relates to an electric automobile technical field especially relates to a box under light weight type power battery.
Background
With the increasing energy crisis and the environmental pollution problem in the world, the light weight of the automobile is more and more emphasized by people. For many new energy automobile companies, the improvement of the endurance mileage is the biggest challenge facing all new energy automobile companies, and there are three main methods for increasing the endurance mileage: the performance of the lithium battery is improved, the number of the lithium batteries is increased, and the weight of the automobile is reduced. Among them, the weight reduction of the car is the most feasible, the lowest cost, the fastest method. The effect of light weight on energy conservation and emission reduction of the automobile is direct and remarkable, and experiments prove that for the traditional fuel oil automobile, the mass of the automobile is reduced by 10 percent, the oil consumption can be reduced by 6 to 8 percent, and the emission is reduced by 3 to 4 percent; for a new energy pure electric vehicle, the vehicle service quality is reduced by 10%, the power consumption is reduced by 5.5%, and the endurance mileage is increased by 5.5%. Meanwhile, the reduction of the automobile quality can reduce the automobile braking distance and improve the safety performance.
Therefore, the light weight research and exploration of the traditional fuel oil automobile and the new energy automobile are always significant. The light weight does not simply reduce the preparation quality, but reduces the preparation quality as far as possible on the premise of ensuring the strength and the safety performance and ensures that the manufacturing cost is in a reasonable range so as to realize the integration of safety and economy. The battery pack box body is used as a bearing and protecting mechanism of the power battery, and occupies an important position in a battery pack system, the preparation quality of the battery pack box body is larger at present, and a larger light-weight space is provided, and meanwhile, the requirement of the policy on the energy density of the battery pack is gradually improved, so that the battery pack box body is highly urgent in light development.
The novel battery pack box is formed by processing a low-carbon steel sheet metal and a welding process, is low in cost but high in box body quality, seriously influences the improvement of the energy density of a battery pack system and the light weight of a new energy automobile, does not accord with the development trend, and needs to be improved in light weight. Therefore, there is a need for a further solution to the technical problem of making the battery pack case lightweight while ensuring its structural strength.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a box under light weight type power battery and manufacturing method thereof to overcome the not enough that exists among the prior art.
In order to solve the technical problem, the technical scheme of the utility model is that:
a light-weight power battery lower case body comprises: a base body, a liquid cooling plate and a bearing tray;
one side of base member is formed with the assembly die cavity, the base member is including range upon range of setting: first composite bed, middle filling layer and second composite bed, first, second composite bed is formed by a plurality of cell layer complex, middle filling layer is the PET stereoplasm foaming layer, the liquid cold plate install in the assembly die cavity, the fixed beam subassembly still has on the liquid cold plate, the bearing tray pass through viscose and bolt install in the another side of base member, one side of liquid cold plate is provided with two water inlets, and the opposite side is provided with a delivery port, with the runner that two water inlets and a delivery port are linked together evenly arranges in the liquid cold plate.
As the improvement of the light-weight power battery lower box body of the utility model, the density range of the PET hard foaming layer is 120kg/m3～150kg/m3。
As the utility model discloses a box's improvement under light weight type power battery, seted up a plurality of holes on the PET stereoplasm foaming layer, filled by the SMC material in arbitrary hole.
As the utility model discloses an improvement of box under light weight type power battery, the fixed beam subassembly includes a plurality of horizontal and vertical installation roof beams that set up, and a plurality of fixed regions are injectd to each horizontal and vertical installation roof beam that sets up.
As the utility model discloses a box's improvement under light weight type power battery, be connected as an organic wholely through friction stir welding between liquid cooling board and the fixed beam subassembly.
As the utility model discloses an improvement of box under light weight type power battery, with each runner that two water inlets are linked together is along X direction parallel arrangement, with each runner that the delivery port is linked together is along Y direction parallel arrangement, the X direction is mutually perpendicular with the Y direction, just each runner along X direction parallel arrangement keeps the intercommunication with each runner along Y direction parallel arrangement.
As the utility model discloses an improvement of box under light weight type power battery, the bearing tray pass through the bolt with the screw has been seted up to the position department that the base member is connected, the periphery of screw is provided with annular protruding muscle.
As the utility model discloses an improvement of box under light weight type power battery, the base member still forms the PVC inoxidizing coating through the mode of spraying with the tray of weighing along the surface of pasting ground direction.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a box adopts PET stereoplasm foaming layer as the lightweight intermediate level under light weight type power battery, is favorable to alleviateing the weight of box. Simultaneously, the structure to base member, liquid cooling plate, bearing tray designs, has promoted the intensity of box under the power battery to make it have better homothermal behavior.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a density-young's modulus graph representing the performance of the lower box of the light-weight power battery pack of the present invention;
fig. 2 is a toughness-strength diagram representing the performance of the lower box of the light-weight power battery pack of the present invention;
FIG. 3 is a specific strength diagram representing the performance of the lower box of the lightweight power battery pack of the present invention;
fig. 4 is a cost-resistivity chart characterizing the performance of the case under the light-weight power battery pack of the present invention;
fig. 5 is a schematic perspective view of an embodiment of a lower case of the light-weight power battery pack of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5;
FIG. 7 is an enlarged cross-sectional view taken along line A-A of FIG. 6;
FIG. 8 is an enlarged view of a portion of FIG. 5;
FIG. 9 is an enlarged cross-sectional view taken along line B-B of FIG. 8;
FIG. 10 is an exploded perspective view of the base of FIG. 5;
FIG. 11 is an exploded perspective view of the fluid cooled plate and the beam assembly secured thereto of FIG. 5;
FIG. 12 is a schematic plan view of the internal flow passages of the liquid cooled plate of FIG. 11;
figure 13 is a perspective view of the load-bearing tray of figure 5;
fig. 14 is a schematic view of the case of the lightweight power battery pack of the present invention during thermosetting molding in an embodiment of the method for manufacturing the case.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a light weight type power battery wraps box and preparation method thereof, with traditional power battery box down in the past adopt metal material (box under the panel beating punching press, the panel beating welds down the box, box under the aluminum alloy extrusion welding again, cast aluminium adds and mills down the box) to use the higher continuous glass fiber + epoxy as the combined material layer of sexual valence ratio to pre-buried stereoplasm foaming PET as lightweight filler reinforcing material in the middle of the intermediate layer, through with combined material layer high temperature mould pressing solidification integrated into one piece in forming die. The composite material is always provided with rigidity and light weight, the density of the composite material is far lower than that of metal and metal alloy, and the density of the composite material of continuous glass fiber and epoxy resin is usually 1600-1820 kg/m3In terms of physical characteristics: for example, young's modulus, strength and specific strength are comparable to those of metals and metal alloys (as shown in fig. 1, fig. 2 and fig. 3), while resistivity in fig. 4 is far greater than that of metals and metal alloys, such characteristics show that the insulating property of the composite material is very superior, and the case body of the power battery made of the metal material is usually subjected to surface insulation treatment for improving the insulating property, and is obviously lower than that of the case body made of the composite material in terms of cost performance.
The utility model discloses a box adopts continuous glass fiber + fire-retardant type epoxy as the base member under the light weight type power battery. The PCM process flow of the whole lower box body composite material molding comprises the following steps: cutting cloth → laying layer → hot pressing and curing in mould → trimming and punching → gluing and riveting → spraying plastic on the bottom of the box → detecting air tightness and size → packaging. According to the difference of the energy storage electric quantity of the battery pack, the design of the bearing structure of the lower box body is slightly changed, the total thickness of the generally adopted composite material of the lower box body is 2-3 mm, the composite material interlayer is filled with the foaming hard PET, the rigidity is enhanced, the density of the foaming hard PET is lower, and the foaming hard PET is generally lower150 to 200kg/m3The foamed hard PET can be formed by foaming in a die and can also be extruded to produce special-shaped foamed structures with different specifications and different shapes, and compared with the traditional PET, the foamed hard PET is processed into a special-shaped embedded structure by CNC (computerized numerical control), the method has the advantage of cost; in order to cool the power battery and fix the module in the lower box body, the cooling plate and the module fixing beam are integrally designed (namely, an aluminum liquid cooling plate and the reinforcing extrusion module fixing beam are welded together through stirring friction), the flow direction balance of cooling liquid in the cooling plate and the cooling consistency of the battery are considered, a water inlet is arranged on both sides of one end of the cooling plate, and a water outlet is arranged on one side of the other end of the cooling plate; in order to better and effectively glue and bond the liquid cooling plate and the module fixed beam assembly with the inner surface of the lower box body, before bonding, the surface of the composite material at the position to be bonded is subjected to sand paper grinding and organic solvent cleaning so as to enhance the adhesive force after bonding, and the bonding surface of the cooling plate is also subjected to phosphating surface treatment so as to remove dirt in the production process and increase the adhesive force after bonding; the bottom of the lower box body of the battery is made of secondary bearing high-strength steel DP780, a reinforcing structure design is locally adopted, and the bearing sheet metal part structure extends to the position below the finished vehicle mounting platform, so that the rigidity and the strength of the mounting platform are enhanced, the force can be effectively transmitted to the whole lower box body sheet metal and a composite material base body, and the vibration force on the battery pack generated in the whole vehicle running process is dispersed; in order to better prolong the use safety and reliability of the lower box body of the battery pack, a mechanical locking device is carried out on the part of a secondary bearing metal plate, a liquid cooling plate, a module fixing beam and a lower box body composite material matrix which are glued and bonded with the inner part of the lower box body through a through pressing bolt, the reduction of the sealing performance of the through box body is considered, sealing structure glue is arranged in a through hole, soft PVC is sprayed on the bottom surface of the lower box body and the surface of a metal plate part, meanwhile, the bottom of the lower box body of the battery can be prevented from being possibly hit by foreign matters or stones for a long time, and the protection of the lower; the flange surface of the lower box body is also an important structural part, the flange surface is generally assembled and sealed with the upper cover of the battery pack, the sealing element between the upper cover and the lower box body is generally formed by adopting a sealing gasket or sealant between the upper cover and the flange surface, and then locking bolts are used for lockingWith upper cover and lower box fastening sealing, the utility model provides a lower box flange face punches the back through the base member, presses the blind hole to rivet in-slip nut + seal structure and glues downthehole impressing together.
As shown in fig. 5, an embodiment of the present invention provides a light-weight lower power battery case, which includes: base member 1, liquid cooling plate 2, bearing tray 3.
Wherein, the outer surfaces of the base body 1 and the weighing tray 3 along the ground attaching direction are also provided with PVC protective layers in a spraying mode. The secondary anti-sealing and metal plate surface anti-corrosion functions are achieved, the IP67 of the lower box body of the battery is effectively ensured, and foreign matters or stone impact is prevented in the long-term use process of the battery pack.
As shown in fig. 6 and 7, the light-weight power battery lower case of the present embodiment has a flange surface connected to the battery case upper cover, and the flange surface is embedded with an anti-slip blind hole clinch nut M5 sleeve 11 as a sealing and locking structure of the lower case and the battery case upper cover, and the grade of the lower case is not less than 8.8 grade, and the material is stainless steel 304.
As shown in fig. 8 and 9, the surface 12 of the light-weight power battery lower case body and the entire chassis during mounting is made of an aluminum alloy material AL6160, the surface is subjected to phosphating treatment and then is subjected to adhesive bonding, and meanwhile, the metal sleeve 13 is embedded in the locking hole. Wherein, use the structural adhesive to carry out the adhesion, can prevent the direct contact with fixed beam of automobile body bottom in lower box surface, also be simultaneously absorb with the whole car locking bolt downthehole metal sleeve pipe that inlays on lower box surface's height
As shown in fig. 10, a mounting cavity is formed on one surface of the base body 1, and the base body 1 includes: the composite material comprises a first composite layer 101, an intermediate filling layer 102 and a second composite layer 103, wherein the first composite layer 101 and the second composite layer 103 are formed by compounding a plurality of unit layers, any unit layer prepreg (continuous glass fiber and flame-retardant epoxy resin) is formed by thermosetting, and the intermediate filling layer 102 is a PET hard foaming layer.
The prepreg is used as a main body 1 of a lower box body of a light-weight composite material after being thermally cured (continuous glass fibers and flame-retardant epoxy resin), the composite material is an epoxy resin system with high cost performance and a flame retardant, the fire-resistant performance of the lower box body of the battery can be ensured, and in addition, the continuous glass fiber layer is formed by mutually and crossly weaving continuous glass fibers and is formed by thermally curing the attached epoxy resin in a mold at a high temperature.
Meanwhile, in order to increase the overall rigidity and strength of the lower box body, the PET hard foaming material is used as a filler, the density of the hard PET foaming layer can be adjusted before the forming, and the hardness is usually adjusted to 120kg/m3～150kg/m3The layer of the filler is between the first composite layer and the second composite layer. In addition, a plurality of holes are formed in the PET hard foaming layer, and any hole is filled with SMC materials. The SMC material with the flame retardant is adopted, so that the flame retardant has the advantages of good flame retardant performance, excellent cost performance, easiness in compression molding and the like, and the purpose is that the hard PET foaming layer in the interlayer is not damaged when the matrix 1 is punched after being molded, and meanwhile, the bonding strength and the sealing performance of the core-through riveting bolt and the hole can be enhanced.
As shown in fig. 11 and 12, the liquid cooling plate 2 is used for realizing the utility model of uniform temperature, it is installed in the assembly cavity and connected by the bonding mode, and the surface of the liquid cooling plate 2 to be spliced is phosphated, so as to effectively increase the adhesive force on the surface of the metal part and remove the 'dirt' generated in the production process. Meanwhile, the bolt connection is also carried out through the locknut.
The liquid cooling plate 2 also has a fixed beam assembly 21 thereon. The liquid cooling plate 2 and the fixed beam assembly 21 can be connected into a whole through friction stir welding. In one embodiment, the fixing beam assembly 21 includes a plurality of mounting beams disposed laterally and longitudinally, each of the laterally and longitudinally disposed mounting beams defining a plurality of fixing regions adapted to mount BMS battery management system fixtures, high voltage distribution boxes, and the like.
In order to obtain good temperature equalization performance, two water inlets 22 are provided at one side of the liquid cooling plate 2, and one water outlet 23 is provided at the other side, and flow passages communicating with the two water inlets 22 and the one water outlet 23 are uniformly arranged in the liquid cooling plate 2. In this way, the coolant can rapidly and uniformly take away the heat of the whole liquid cooling plate 2, in one embodiment, the runners 24 communicated with the two water inlets 22 are arranged in parallel along the X direction, the runners 25 communicated with the water outlets 23 are arranged in parallel along the Y direction, the X direction is perpendicular to the Y direction, and the runners 24 arranged in parallel along the X direction are communicated with the runners 25 arranged in parallel along the Y direction.
As shown in fig. 13, the load-bearing tray 3 is mounted on the other surface of the base 1 by glue and bolts, and is used to increase the strength of the lower case of the light-weight power battery of this embodiment. The load-bearing pallet 3 is made of high-strength galvanized steel DP 780.
Specifically, above-mentioned bearing tray 3 local advances additional strengthening design to it is as an organic whole through structural adhesive bonding with base member 1, in order effectively to carry out rigid connection with the box under bearing panel beating tray and the compound, carry out concave-convex structure design at the panel beating part, punch and lock together through running through riveting bolt and the inside liquid cooling board 2 of box down and module fixed beam assembly 21 in the concave, can effectively play the intensity and the rigidity of box under the whole battery, more be favorable to increasing the overall protection of battery package box. In one embodiment, the position where the load-bearing tray 3 is connected with the base 1 through bolts is provided with a screw hole 31, and the periphery of the screw hole 31 is provided with an annular convex rib.
Meanwhile, before riveting, the contact surface of the base body 1 and the bearing tray 3 is subjected to surface treatment, the treatment method is usually to polish and clean with organic solvent, and the 'dirt' generated in the production process of the surface of the base body 1 is removed; the surface of the bearing tray sheet metal part to be glued is also subjected to phosphating treatment, so that the adhesive force of the surface of the metal part can be effectively increased, and dirt generated in the production process can be removed.
Based on the same utility model concept, another embodiment of the utility model provides a manufacturing method of box under light weight type power battery still.
As shown in fig. 14, the method for manufacturing the lower case of the lightweight power battery includes:
in the male mold 100, the unit layers are cut, and the cut unit layers are layered one by one and pressed together to form the first composite layer 10.
Placing the foamed hard PET on the paved first composite layer 10, and applying pressure to make the foamed hard PET and the paved first composite layer fully attached;
layering and laminating the cut unit layers on the foamed hard PET layer 20 one by one to form a second composite layer 30;
then the profiling heat-conducting silica gel die pad 40 is placed on the second composite layer 30;
closing the female die and the male die 100, putting the closed preheated curing die into a press, and performing hot-press molding under the process condition to form a matrix;
and a liquid cooling plate and a bearing tray are assembled on the base body.
Wherein the unit layer is made of prepreg of continuous glass fiber and 40% of flame-retardant epoxy resin, and the prepreg is 400g/m2And 3 layers of prepreg are overlapped and layered up and down, and the thickness of the 3 layers of prepreg after mould pressing and thermosetting molding is about 0.96 mm. The thickness of the easily-demoulded heat-conducting silica gel die pad is 3mm, the easily-demoulded heat-conducting silica gel die pad has the effects of reducing the use cost of the demoulding agent and preventing the lower box body and the female die after thermosetting from sticking a die and clamping the die, the labor intensity of polishing the die due to the use of the demoulding agent is reduced, and meanwhile, a certain balance absorption effect is achieved in a die assembly gap generated by uneven thickness of a spreading material in the die assembly hot-pressing process. In addition, a certain thickness space of the heat-conducting silica gel die pad easy to release is reserved in the design of the die closing gap of the die, and the overpressure of the die on the prepreg, the embedded part and the heat-conducting silica gel die pad before the in-die forming can be ensured by the die closing height limitation in the design of the die.
In one embodiment, the prepreg unit layers are placed on a cloth cutting machine for cutting, and 3 layers of 400g/m of raw materials are arranged on a male die (male die) according to the process requirements after cutting2The prepreg is laminated one by one and the first procedure of laminating is completed; then placing the foamed hard PET on the prepreg with the spread layer, and properly manually applying pressure to ensure that the prepreg is fully attached to the PET to finish a second procedure; then, SMC material filling is carried out on all the holes on the hard PET, and a third working procedure is completed; finally, the 3 layers are 400g/m2The prepregs are laminated one by one to complete the laminating of the fourth procedure; and finally, placing the profiling heat-conducting silica gel die pad on the final laying layer, closing the die (female die) and the male die (male die) by using a hoisting tool, and placing the closed preheated curing die into a press.
And (3) hot press molding: putting the die on a workbench of a press, starting the press to close the die, and dividing the die closing pressure into three stages, wherein the pressure of the first stage is 10Bar, the die pressing temperature is 70 ℃, the heat preservation is 180S, the pressure of the second stage is 30Bar, the die pressing temperature is 100 ℃, the heat preservation is 240S, the pressure of the third stage is 50Bar, the die pressing temperature is 145 ℃, and the heat preservation is 300S; after mould pressing solidification, a press opens the mould, the mould moves to a designated position from the press for cooling in a cooling mode (1, natural cooling is carried out to 65 ℃, 2, the mould moves to a gradually cooling channel for rapidly cooling to 65 ℃); and at the moment, the temperature can perform die opening and demoulding on the lower box body subjected to die pressing and solidification, the lower box body subjected to demoulding flows into a post-processing procedure, processing and technological assembly are performed according to the drawing size requirement of the box body, the assembled finished product is subjected to size detection, appearance detection, air tightness detection and the like, and finally the qualified product is packaged and warehoused.
To sum up, the utility model discloses a box adopts PET stereoplasm foaming layer as the lightweight intermediate level under light weight type power battery, is favorable to alleviateing the weight of box. Simultaneously, the structure to base member, liquid cooling plate, bearing tray designs, has promoted the intensity of box under the power battery to make it have better homothermal behavior.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a box under light weight type power battery which characterized in that box under light weight type power battery includes: a base body, a liquid cooling plate and a bearing tray;
one side of base member is formed with the assembly die cavity, the base member is including range upon range of setting: first composite bed, middle filling layer and second composite bed, first, second composite bed is formed by a plurality of cell layer complex, middle filling layer is the PET stereoplasm foaming layer, the liquid cold plate install in the assembly die cavity, the fixed beam subassembly still has on the liquid cold plate, the bearing tray pass through viscose and bolt install in the another side of base member, one side of liquid cold plate is provided with two water inlets, and the opposite side is provided with a delivery port, with the runner that two water inlets and a delivery port are linked together evenly arranges in the liquid cold plate.
2. A lightweight power battery lower case body according to claim 1, wherein the density range of the PET rigid foaming layer is 120kg/m3～150kg/m3。
3. A lightweight power battery lower case body as claimed in claim 1, wherein a plurality of holes are formed in the PET rigid foaming layer, and any hole is filled with SMC material.
4. A lightweight power battery lower case according to claim 1, wherein the securing beam assembly includes a plurality of laterally and longitudinally disposed mounting beams, each laterally and longitudinally disposed mounting beam defining a plurality of securing regions.
5. A lightweight power battery lower case according to claim 1, wherein the liquid cooling plate and the fixing beam assembly are connected into a whole by friction stir welding.
6. The lower box body for the light-weight power battery as claimed in claim 1, wherein the flow channels connected with the two water inlets are arranged in parallel along an X direction, the flow channels connected with the water outlet are arranged in parallel along a Y direction, the X direction is perpendicular to the Y direction, and the flow channels arranged in parallel along the X direction are communicated with the flow channels arranged in parallel along the Y direction.
7. A lightweight power battery lower box body according to claim 1, wherein a screw hole is formed at a position where the load bearing tray is connected with the base body through a bolt, and an annular convex rib is arranged on the periphery of the screw hole.
8. A lightweight power battery lower box body according to claim 1, characterized in that the outer surfaces of the base body and the weighing tray in the ground adhering direction are further coated with a PVC protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374324.2U CN211350776U (en) | 2020-03-23 | 2020-03-23 | Light-weight power battery lower box body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374324.2U CN211350776U (en) | 2020-03-23 | 2020-03-23 | Light-weight power battery lower box body |
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| CN211350776U true CN211350776U (en) | 2020-08-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933861A (en) * | 2020-10-13 | 2020-11-13 | 苏州银禧新能源复合材料有限公司 | Continuous fiber foam bottom protection plate structure of lower box body of battery pack and preparation method |
| CN112599903A (en) * | 2020-12-24 | 2021-04-02 | 湖北亿纬动力有限公司 | Liquid cooling battery box and battery package |
-
2020
- 2020-03-23 CN CN202020374324.2U patent/CN211350776U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933861A (en) * | 2020-10-13 | 2020-11-13 | 苏州银禧新能源复合材料有限公司 | Continuous fiber foam bottom protection plate structure of lower box body of battery pack and preparation method |
| CN112599903A (en) * | 2020-12-24 | 2021-04-02 | 湖北亿纬动力有限公司 | Liquid cooling battery box and battery package |
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Address after: 213300 No.9 Yongxing Avenue, Shangxing Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: Liyang kangben composite material Co.,Ltd. Patentee after: Suzhou kangben New Energy Technology Co.,Ltd. Address before: 213300 No.9 Yongxing Avenue, Shangxing Town, Liyang City, Changzhou City, Jiangsu Province Patentee before: Liyang kangben composite material Co.,Ltd. Patentee before: SUZHOU YINXI NEW ENERGY COMPOSITE MATERIALS Co.,Ltd. |