CN212380497U - Rolled section bar, battery pack framework and battery pack - Google Patents
Rolled section bar, battery pack framework and battery pack Download PDFInfo
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- CN212380497U CN212380497U CN202021348772.1U CN202021348772U CN212380497U CN 212380497 U CN212380497 U CN 212380497U CN 202021348772 U CN202021348772 U CN 202021348772U CN 212380497 U CN212380497 U CN 212380497U
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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 discloses a roll-in section bar, battery package skeleton and battery package, including steel roll-in section bar body, roll-in section bar body is including the square rectangular pipe that has a step face. Different with the aluminum alloy structure that current battery package skeleton utilized, the roll-in section bar that this application provided utilizes steel, and steel roll-in section bar body is simpler, processing installation is also more convenient. The steel has the advantages of light weight, small volume, thin material, high strength and rigidity, and the cost of the steel is lower than that of aluminum alloy, so that the requirements of new energy automobiles on light weight and safety performance can be met.
Description
Technical Field
The utility model belongs to the technical field of the fixed battery technique and specifically relates to a roll-in section bar, battery package skeleton and battery package are related to.
Background
With the development of new energy automobile technology, the light weight and safety of the battery pack framework of the automobile are increasingly valued by users and host factories. The volume and the mass of a battery pack carried by a common new energy automobile are large, and difficulty is brought to the arrangement and the structural design of an automobile body. In order to improve the endurance mileage of the new energy automobile, the light weight of the battery pack needs to be ensured.
In addition, the battery pack is easy to catch fire or even explode when the automobile collides, so that the battery pack framework is required to have a certain protection function so as to prevent the battery pack from being damaged by impact when the automobile collides.
In the prior art, most of battery pack frameworks prepared from aluminum alloy are used, and in order to ensure sufficient strength and rigidity, the aluminum alloy battery pack frameworks have the defects of large volume, thick material, heavier weight and high cost.
Therefore, a solution that combines weight reduction and safety is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a roll-in section bar, battery package skeleton and battery package for can't compromise the defect of lightweight and security among the solution prior art.
In order to solve the technical problem, the utility model provides a roll-in section bar, including steel roll-in section bar body, roll-in section bar body is including the square rectangular pipe that has a step face, the step face does one of square rectangular pipe is the side of step form, the step face includes high face, low face and connects the face, high face with the low face passes through connect the face to connect.
Optionally, a side surface of the rolled profile body opposite to and/or adjacent to the step surface is a groove surface, a groove recessed toward the step surface is formed in the groove surface, and the width of the groove is smaller than that of the groove surface.
Optionally, the connecting surface and the lower surface have an included angle, and the included angle is a right angle or an obtuse angle or an acute angle.
Optionally, the connecting surface and the high surface have an included angle, and the included angle is a right angle or an obtuse angle or an acute angle.
Optionally, at least one of the following is disposed on the high surface: rivet holes, snap holes, and nut holes.
Optionally, two side surfaces of the rolled profile body adjacent to the step surface are provided with at least one of: via hole, rivet hole, buckle hole and nut hole.
Optionally, the rolled profile body is provided with at least one of the following on the side opposite to the high side: via hole, rivet hole, snap hole and nut hole
Based on the same invention concept, the utility model also provides a battery package skeleton for new energy automobile's battery package utilizes the roll-in section bar preparation of any one in the above-mentioned feature description.
Optionally, the battery pack framework comprises a plurality of rolled profiles, and the rolled profiles are arranged in a surrounding manner to form a surrounding structure;
all the step surfaces are positioned on the same surface of the envelope structure, and all the low surfaces form a sinking part;
a cover plate is arranged in the sinking part, and the opposite side surface of the building enclosure where the sinking part is located is connected with a tray;
the enclosure structure, the cover plate and the tray form an accommodating space, and a battery module is placed in the accommodating space;
wherein a plurality of the rolled profiles are equal or unequal in length.
Optionally, a side surface of the rolled profile body opposite to the step surface is a groove surface, a groove which is recessed towards the step surface is arranged on the groove surface, and the width of the groove is smaller than that of the groove surface;
the battery pack framework comprises a plurality of rolled sections which are arranged in a surrounding manner to form an enclosure structure;
all the step surfaces are positioned on the same surface of the envelope structure, and all the low surfaces form a sinking part;
a cover plate is arranged in the sinking part;
the contact end parts of two adjacent rolling sectional materials are respectively provided with a chamfer part, the chamfer parts are spliced with each other to enable the grooves to be communicated, the grooves form a groove, and the groove is used for embedding a tray;
the enclosure structure, the cover plate and the tray form an accommodating space, and a battery module is placed in the accommodating space;
wherein a plurality of the rolled profiles are equal or unequal in length.
Optionally, the connection between two adjacent rolled profiles comprises welding.
Optionally, the number of the rolled profiles is four, and four rolled profiles enclose a rectangular enclosure.
Based on the same inventive concept, the utility model discloses still provide a battery package, including any one of the battery package skeleton in above-mentioned feature description.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a roll-in section bar, including steel roll-in section bar body, roll-in section bar body is including the square tube that has a step face. Different with the aluminum alloy structure that current battery package skeleton utilized, the roll-in section bar that this application provided utilizes steel, and steel roll-in section bar body is simpler, processing installation is also more convenient. The steel has the advantages of light weight, small volume, thin material, high strength and rigidity, and the cost of the steel is lower than that of aluminum alloy, so that the requirements of new energy automobiles on light weight and safety performance can be met.
2. The utility model provides a pair of battery package skeleton utilizes roll-in section bar, consequently it have with the whole beneficial effect of roll-in section bar. In addition, the rolling section is a square and rectangular pipe with a step surface, all the step surfaces are positioned on the same surface of the enclosure structure, all the low surfaces form a sinking part, and a cover plate is arranged in the sinking part. The sinking part formed by the lower surface of the step surface can ensure the connection sealing performance of the cover plate and the battery pack framework, and the connection sealing performance is improved compared with that of the prior art.
3. The side face, opposite to the step face, of the rolled section bar body can be set to be a groove face, a groove which is concave towards the step face is formed in the groove face, a chamfer portion is formed by the contact end portion of the rolled section bar through chamfer design, the chamfer portions are mutually spliced to enable the grooves to be communicated, and the grooves form a groove which can be used for embedding a tray and is more beneficial to positioning and installation.
The utility model discloses still provide a battery package, its with roll-in section bar and the battery package skeleton belongs to same inventive concept, consequently, has the same beneficial effect.
Drawings
Fig. 1 is a cross-sectional view of a rolled profile according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
fig. 3 is a schematic view of a skeleton structure of a battery pack according to another embodiment of the present invention;
FIG. 4 is an enlarged view of junction A of FIG. 3;
FIG. 5 is an enlarged view of junction B of FIG. 3;
fig. 6 is a schematic view of another structure of a battery pack according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of junction C of FIG. 6;
FIG. 8 is an enlarged schematic view of junction D of FIG. 6;
FIG. 9 is a dimensional representation of a rolled profile;
wherein, the section bar is 10-rolled section bar, 100-step surface, 101-high surface, 102-low surface, 103 connecting surface, 20-through hole, 30-rivet hole, 40-nut hole, 50-sunken part, 60-buckling hole, 70-groove surface, 700-groove and 80-chamfered part.
Detailed Description
The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1 and 2, an embodiment of the present invention provides a rolled section 10, including a steel rolled section body, the rolled section body includes a square rectangular tube having a step surface 100, the step surface 100 is a side surface of the square rectangular tube, the side surface is step-shaped, the step surface 100 includes a high surface 101, a low surface 102 and a connecting surface 103, and the high surface 101 and the low surface 102 are connected through the connecting surface 103. Wherein fig. 1 is a sectional view of one end of the rolled profile 10, and fig. 2 is a sectional view of the rolled profile 10. It will be understood by those skilled in the art that the cross-sectional view of the square rectangular tube may be rectangular or square, and is not limited thereto. The high surface 101, the low surface 102, and the connection surface 103 are integrally formed.
Different from the prior art, the utility model provides a roll-in section bar 10, including steel roll-in section bar body, roll-in section bar body is including the square rectangular pipe that has a step face 100. Different with the aluminum alloy structure that current battery package skeleton utilized, the roll-in section bar 10 that this application provided utilizes steel, and steel roll-in section bar body is simpler, processing installation is also more convenient. The steel has the advantages of light weight, small volume, thin material, high strength and rigidity, and the cost of the steel is lower than that of aluminum alloy, so that the requirements of new energy automobiles on light weight and safety performance can be met.
The rolled profile body is preferably prepared from high-strength steel of 500Mpa grade or higher, wherein the rolled profile body is prepared by two process methods, one of which is: pre-punching, continuous rolling and forming, welding, cutting and the like; the second is as follows: and the processes of continuous roll forming, welding, hole cutting, cutting and the like are completed. The above-mentioned section is a square high-strength rolled section 10 with a step surface 100. The high strength steel of 500Mpa grade or above is selected to further improve the rigidity and strength of the rolled section 10 and to further reduce the thickness of the rolled section 10. In addition, the width ratio and the height ratio of the high surface 101 to the low surface 102, and the length or the form of the connection surface 103 may be adjusted according to actual needs, and may be selected according to the cover plate structure of the subsequent battery pack, which is not limited herein.
Referring to fig. 2, in the embodiment of the present invention, the connection surface 103 and the lower surface 102 have an included angle, and the included angle is an obtuse angle, it can be understood that the included angle can also be a right angle or an acute angle, and the specific angle of the included angle can be selected according to actual needs. In addition, the connection surface 103 and the high surface 101 have an included angle, and the included angle is a right angle or an obtuse angle or an acute angle or an obtuse angle. The angle between the connecting surface and the lower surface is preferably 90 ° ± 15 °.
Further, referring to fig. 3, the high surface 101 and the side surface of the rolled profile body opposite to the high surface are provided with at least one of the following: via 20, rivet hole 30, snap hole 60, and nut hole 40. The through holes 20, the rivet holes 30, the fastening holes 60 and the nut holes 40 are used for mounting subsequent fittings, and it is understood that the specific number of the through holes 20, the rivet holes 30, the fastening holes 60 and the nut holes 40 and the specific arrangement position on the high surface 101 can be selected according to actual needs, and are not limited herein.
Further, two side faces of the rolled profile body adjacent to the step face 100 are provided with at least one of: via 20, rivet hole 30, snap hole 60, and nut hole 40. Similarly, the specific number and the specific arrangement position of the through holes 20, the rivet holes 30, the fastening holes 60 and the nut holes 40 can be selected according to the actual requirement, and are not limited herein.
With continued reference to fig. 1 and 2, preferably, the side of the rolled profile body opposite and/or adjacent to the step surface 100 may also be a groove surface 70, the groove surface 70 is provided with a groove 700 recessed towards the step surface, and the width of the groove 700 is smaller than the width of the groove surface 70. In the embodiment of the present invention, the side opposite to the step surface 100 is only set as the groove surface 70 for specific description, and in other embodiments, the groove surface 70 can also be set as the side adjacent to the step surface 100, which is not described herein again.
Referring to fig. 9, the dimensions H1, H2, H3, H4, H5 and H6 of the respective side faces, the top face, the bottom face, the connecting face, the groove face and the groove in the rolled section 10 are preferably 200mm or less, and limiting these dimensions to 200mm can reduce the occupied space of the battery pack inside the vehicle body while ensuring safety.
Based on the same inventive concept, please refer to fig. 3 to 8, another embodiment of the present invention further provides a battery pack skeleton for a battery pack of a new energy automobile, which is prepared by using the rolled section 10 described in any one of the above feature descriptions.
Specifically, the battery pack framework comprises a plurality of rolled profiles 10, and the rolled profiles 10 are arranged in an enclosing mode to form an enclosing structure. All the step surfaces 100 are located on the same side of the building envelope, and all the low surfaces 102 form a sinking portion 50. A cover plate is arranged in the sinking part 50, and the opposite side of the side face of the building enclosure where the sinking part 50 is located is connected with a tray. The enclosure structure, the cover plate and the tray form an accommodating space, and a battery module is placed in the accommodating space. Wherein a plurality of said rolled profiles 10 are equal or unequal in length. It can be understood that the cover plate and the tray are both components of the battery pack, and the accommodating space is used for accommodating other components of the battery pack besides the battery module, including but not limited to an evaporator, a PTC heating module, a fan, an air duct and a temperature acquisition component, such as a thermal management system, a flexible connection and an electrical interface. The plurality of low surfaces 102 are surrounded to form the sinking portion 50, the sinking portion 50 can be seen as a sinking groove, after the building envelope is assembled, a cover plate can be embedded into the sinking portion 50 to be connected with the cover plate, the cover plate can be connected with the rivet hole 30 or the buckle hole 60 or the nut hole 40 on the high surface 101, the cover plate can be directly connected with the high surface 101 or the low surface 102 in a welding mode except for being connected with the rivet hole 30, the buckle hole 60 and the nut hole 40, and the specific connection mode can be selected according to actual needs. It is understood by those skilled in the art that the cover plate and the tray can be selected from the battery pack of the prior art and the battery pack of the future, and the detailed description thereof is omitted here.
Referring to fig. 4 and 5, and fig. 7 and 8, fig. 4 is an enlarged view of a connection point a in fig. 3, fig. 5 is an enlarged view of a connection point B in fig. 3, fig. 7 is an enlarged view of a connection point C in fig. 6, and fig. 8 is an enlarged view of a connection point D in fig. 6. In the embodiment of the present invention, the connection mode between the two rolling profiles 10 is welding, and it can be understood that, the connection between the two rolling profiles 10 can also be performed by other modes, which is not limited herein and can be selected according to specific actual needs. As can be seen from fig. 4 to 9, the connection manner between two adjacent rolled profiles 10 is that one end face of one rolled profile is connected to one side face of the other rolled profile, and the specific position of the end face to the side face is not limited herein, and may be specifically selected according to actual needs, and it is to be noted that it is required to ensure that the lower faces 102 of two adjacent rolled profiles 10 are in the same plane, that is, the two lower faces are aligned.
Referring to fig. 3 and 6, in the embodiment of the present invention, the number of the rolled sections 10 is four, and four rolled sections 10 enclose a rectangular enclosure. It is understood that the number of the rolled profiles 10 in each of the battery pack frames may be other numbers, and the shape may be other shapes. In other embodiments, the enclosure structure can also be in an I shape, a T shape or an earth shape, and can be specifically designed according to the structure of the new energy automobile.
The rolled section 10 is a square rectangular tube with a step surface 100, all the step surfaces 100 are located on the same surface of the enclosure, all the low surfaces 102 form a sinking portion 50, and a cover plate is arranged in the sinking portion 50. The sinking portion 50 formed by the lower surface 102 of the step surface 100 can ensure the connection sealing performance of the cover plate and the battery pack frame, and the connection sealing performance is improved compared with the prior art.
In addition to the peripheral staggered surrounding assembly form shown in fig. 3, the battery pack frame in other embodiments of the present invention may also use other types of assembly methods, please refer to fig. 6 to 8, and use the rolled section bar 10 shown in fig. 1, that is, the side of the rolled section bar body opposite to the step surface is a groove surface 70, the groove surface 70 is provided with a groove 700 recessed toward the step surface, and the width of the groove 700 is smaller than the width of the groove surface 70. The battery pack framework comprises a plurality of rolled sections 10, and the rolled sections 10 are arranged in an enclosing mode to form an enclosing structure. All the step surfaces are positioned on the same surface of the envelope structure, and all the low surfaces form a sinking part. A cover plate is arranged in the sinking part. The contact end of two adjacent rolling profiles 10 is provided with a chamfer part 80, the chamfer parts 80 are spliced with each other to communicate the grooves 700, and the grooves 700 form a groove for embedding a tray. The enclosure structure, the cover plate and the tray form an accommodating space, and a battery module is placed in the accommodating space. Wherein a plurality of said rolled profiles 10 are equal or unequal in length. Through inciting somebody to action the tip of roll-in section bar body is chamfered the back, no matter step face and recess 700, all can be UNICOM all around as a whole, upper portion forms sunken seal groove, recess 700 UNICOM all around forms whole slot, can be used to the tray and embed into, be favorable to location and installation, simultaneously between frame and tray down, still can increase the fire-retardant vibration/noise reduction material of one deck, three-layer combination promptly, the slot can carry out spacing installation of being convenient for to new material and tray down, prevent the hard contact between frame and tray simultaneously, effectively reduce the noise, through embedded combination, reduce the fit-up gap, improved the vibration/noise reduction fire-retardant effect of battery package skeleton.
Based on the same inventive concept, another embodiment of the present invention further provides a battery pack, including the battery pack frame described in any of the above feature descriptions.
To sum up, the utility model discloses following beneficial effect has:
1. the utility model provides a roll-in section bar, including steel roll-in section bar body, roll-in section bar body is including the square tube that has a step face. Different with the aluminum alloy structure that current battery package skeleton utilized, the roll-in section bar that this application provided utilizes steel, and steel roll-in section bar body is simpler, processing installation is also more convenient. The steel has the advantages of light weight, small volume, thin material, high strength and rigidity, and the cost of the steel is lower than that of aluminum alloy, so that the requirements of new energy automobiles on light weight and safety performance can be met.
2. The utility model provides a pair of battery package skeleton utilizes roll-in section bar, consequently it have with the whole beneficial effect of roll-in section bar. In addition, the rolling section is a square and rectangular pipe with a step surface, all the step surfaces are positioned on the same surface of the enclosure structure, all the low surfaces form a sinking part, and a cover plate is arranged in the sinking part. The sinking part formed by the lower surface of the step surface can ensure the connection sealing performance of the cover plate and the battery pack framework, and the connection sealing performance is improved compared with that of the prior art.
3. The side face, opposite to the step face, of the rolled section bar body can be set to be a groove face, a groove which is concave towards the step face is formed in the groove face, a chamfer portion is formed by the contact end portion of the rolled section bar through chamfer design, the chamfer portions are mutually spliced to enable the grooves to be communicated, and the grooves form a groove which can be used for embedding a tray and is more beneficial to positioning and installation.
The utility model discloses still provide a battery package, its with roll-in section bar and the battery package skeleton belongs to same inventive concept, consequently, has the same beneficial effect.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example" or "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (13)
1. The utility model provides a roll-in section bar, its characterized in that includes steel roll-in section bar body, roll-in section bar body is including the square rectangular pipe that has a step face, the step face does one of square rectangular pipe is step-like side, the step face includes high face, low face and connects the face, high face with low face passes through connect the face and connect.
2. A rolled profile according to claim 1, wherein the side of the rolled profile body opposite and/or adjacent to the step surface is a groove surface, wherein the groove surface is provided with a groove recessed towards the step surface, wherein the width of the groove is smaller than the width of the groove surface.
3. A rolled profile according to claim 1, wherein the connecting surface and the lower surface have an angle, said angle being a right angle or an obtuse or acute angle.
4. A rolled profile according to claim 1, wherein the connecting surface and the high surface have an angle, said angle being a right angle or an obtuse or acute angle.
5. Rolled profile according to claim 1, wherein the high side is provided with at least one of: rivet holes, snap holes, and nut holes.
6. A rolled profile according to claim 1, wherein two side faces of the rolled profile body adjacent to the step face are provided with at least one of: via hole, rivet hole, buckle hole and nut hole.
7. A rolled profile according to claim 1, wherein the side of the rolled profile body opposite to the high side is provided with at least one of: via hole, rivet hole, buckle hole and nut hole.
8. A battery pack skeleton characterized in that a battery pack for a new energy automobile is produced using the rolled profile according to any one of claims 1 to 7.
9. The battery pack frame of claim 8, wherein the battery pack frame comprises a plurality of rolled sections, the plurality of rolled sections being configured to form a perimeter;
all the step surfaces are positioned on the same surface of the envelope structure, and all the low surfaces form a sinking part;
a cover plate is arranged in the sinking part, and the opposite side surface of the building enclosure where the sinking part is located is connected with a tray;
the enclosure structure, the cover plate and the tray form an accommodating space, and a battery module is placed in the accommodating space;
wherein a plurality of the rolled profiles are equal or unequal in length.
10. The battery pack frame according to claim 8, wherein the side of the rolled profile body opposite to the step surface is a groove surface, the groove surface is provided with a groove recessed toward the step surface, and the width of the groove is smaller than the width of the groove surface;
the battery pack framework comprises a plurality of rolled sections which are arranged in a surrounding manner to form an enclosure structure;
all the step surfaces are positioned on the same surface of the envelope structure, and all the low surfaces form a sinking part;
a cover plate is arranged in the sinking part;
the contact end parts of two adjacent rolling sectional materials are respectively provided with a chamfer part, the chamfer parts are spliced with each other to enable the grooves to be communicated, the grooves form a groove, and the groove is used for embedding a tray;
the enclosure structure, the cover plate and the tray form an accommodating space, and a battery module is placed in the accommodating space;
wherein a plurality of the rolled profiles are equal or unequal in length.
11. The battery pack case skeleton according to claim 9 or 10, wherein the connection means between two adjacent rolled profiles comprises welding.
12. The battery pack frame according to claim 9 or 10, wherein the number of the rolled profiles is four, and four rolled profiles are enclosed to form a rectangular enclosure.
13. A battery pack comprising the battery pack skeleton according to any one of claims 9 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021348772.1U CN212380497U (en) | 2020-07-10 | 2020-07-10 | Rolled section bar, battery pack framework and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021348772.1U CN212380497U (en) | 2020-07-10 | 2020-07-10 | Rolled section bar, battery pack framework and battery pack |
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| CN212380497U true CN212380497U (en) | 2021-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023020552A1 (en) * | 2021-08-19 | 2023-02-23 | 北京车和家信息技术有限公司 | Lower housing, battery pack, and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023020552A1 (en) * | 2021-08-19 | 2023-02-23 | 北京车和家信息技术有限公司 | Lower housing, battery pack, and vehicle |
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Denomination of utility model: Rolled profiles, battery pack skeleton, and battery pack Effective date of registration: 20230303 Granted publication date: 20210119 Pledgee: Bank of Communications Ltd. Kunshan branch Pledgor: Suzhou yichuangte Intelligent Manufacturing Co.,Ltd. Registration number: Y2023980034076 |