CN112670649A - Power battery box lower case and connection step thereof with power battery - Google Patents

Power battery box lower case and connection step thereof with power battery Download PDF

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Publication number
CN112670649A
CN112670649A CN202011278684.3A CN202011278684A CN112670649A CN 112670649 A CN112670649 A CN 112670649A CN 202011278684 A CN202011278684 A CN 202011278684A CN 112670649 A CN112670649 A CN 112670649A
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CN
China
Prior art keywords
power battery
section
box body
box
boundary
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Pending
Application number
CN202011278684.3A
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Chinese (zh)
Inventor
丁为广
郭大洲
陈智家
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Zhejiang Leapmotor Technology Co Ltd
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Zhejiang Leapmotor Technology Co Ltd
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Priority to CN202011278684.3A priority Critical patent/CN112670649A/en
Publication of CN112670649A publication Critical patent/CN112670649A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

Case shell under power battery box is including casing body, box boundary beam, box reinforcing longeron one, box reinforcing longeron two, subregion section bar, module rubber coating board, fastening bolt down, wholly be bilateral symmetry structure. The box boundary beam is enclosed into a circle by a plurality of sections of short boundary beams in an end-to-end manner, the first and second box reinforcing longitudinal beams are in front and back directions, the cross sections of the first and second box reinforcing longitudinal beams are in inverted U shapes, and the first and second box reinforcing longitudinal beams are welded with the lower shell body. The corresponding parts of the glue coating plates of the module are fixedly connected with the fourth section of the boundary beam and the first and the second reinforcing longitudinal beams of the box body respectively. The partition section divides the module glue coating plate into three areas for installing the power battery module, and when the power battery module is installed, the periphery and the lower surface of the lower end of the power battery module are fixedly connected together through epoxy resin glue and corresponding components forming the lower box shell of the power battery box body. The connection step of the lower box shell of the power battery box body and the power battery is as follows: 1. preparing; 2. spraying epoxy resin glue; 3. placing a power battery module; 4. and epoxy resin glue is sprayed on the periphery of the power battery module.

Description

Power battery box lower case and connection step thereof with power battery
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a connecting and fixing structure of a power battery in an electric automobile and a lower box shell of a box body for containing the power battery.
Background
The connection structure of the lower box body of the power battery box body for installing the power battery and the lower end of the power battery of the electric automobile directly relates to the stability and reliability of the connection structure between the power battery and the lower box body of the power battery box body.
Utility model patent documents with application number CN201020130762.0, publication number CN 201703236U, and name "a power battery fixing structure of hybrid electric vehicle" disclose a power battery box for mounting a power battery: the power battery box body is fixed on the power battery support, the power battery support is positioned above the spare tire, a distance is reserved between the power battery support and the spare tire, and the two sides of the power battery support are arranged on two longitudinal beams of a luggage compartment of a vehicle body. However, the patent document does not specifically disclose the connection structure of the power battery and the power battery case. According to the existing connection structure of the power battery and the power battery box body, the lower case shells of the power battery and the power battery box body are connected together by adopting a plurality of bolts, and the problem of uneven stress exists in the connection between the power battery and the lower case shell of the power battery box body.
Disclosure of Invention
The invention mainly aims to provide a lower case of a power battery case and a connection step of the lower case and a power battery.
The technical scheme for the lower case of the power battery case is as follows: a lower box shell of a power battery box body comprises a lower box body, box body side beams, a box body reinforcing longitudinal beam I, a box body reinforcing longitudinal beam II, partition profiles, module glue coating plates and fastening bolts; the lower shell of the power battery box body is integrally of a bilateral symmetry structure; wherein the content of the first and second substances,
the box body boundary beam is formed into a ring by connecting a plurality of sections of short boundary beams end to end, and the section perpendicular to the length direction of the short boundary beams comprises a first section of the boundary beam, a second section of the boundary beam, a third section of the boundary beam, a fourth section of the boundary beam, a fifth section of the boundary beam and a sixth section of the boundary beam; the first section of the edge beam, the third section of the edge beam and the fifth section of the edge beam are in an outward inclining state with the outer end higher than the inner end, and the second section of the edge beam, the fourth section of the edge beam and the sixth section of the edge beam are in a horizontal state; the first section of the boundary beam, the second section of the boundary beam, the third section of the boundary beam, the fourth section of the boundary beam, the fifth section of the boundary beam and the sixth section of the boundary beam are sequentially connected into a whole; the outer surface of the first section of the boundary beam, the lower surfaces of the fourth section of the boundary beam and the sixth section of the boundary beam are respectively welded with the surfaces of the corresponding parts of the lower shell body;
the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam are both in the front-back direction, the first box body reinforcing longitudinal beam is three, the second box body reinforcing longitudinal beam is two, the left-right direction sections of the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam are in inverted U shapes, and the lower ends of two inverted U-shaped side walls are welded with the lower shell body; the corresponding parts of the module glue coating plates are respectively placed on the upper surfaces of the fourth section of the side beam, the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam and are fixedly connected with the upper surfaces of the fourth section of the side beam, the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam;
the two partition sectional materials in the front and back directions are fixedly connected with the corresponding box body reinforcing longitudinal beam II through a plurality of bolts respectively so as to divide the module glue coating plate into three areas for installing the power battery modules with the same size, and the corresponding parts of the module glue coating plate are clamped between the corresponding partition sectional materials and the box body reinforcing longitudinal beam II; the first box body reinforcing longitudinal beams correspond to an area for installing the power battery module respectively; when the power battery module is installed, the periphery and the lower surface of the lower end of the power battery module are fixedly connected together through epoxy resin glue and corresponding components forming the lower box shell of the power battery box body.
According to the invention, the power battery module and the lower case of the power battery case are connected by the epoxy resin adhesive, so that the connection area and the connection stability of the power battery module and the lower case of the power battery case are increased, and the lower case of the power battery case is not easy to deform.
Preferably, the first section of the boundary beam, the second section of the boundary beam, the third section of the boundary beam, the fourth section of the boundary beam, the fifth section of the boundary beam and the sixth section of the boundary beam are sequentially connected through corresponding arc sections. According to the preferred scheme, the internal stress of the box body boundary beam is small, and the structural stability is high.
Preferably, the sectional profile has a cross section of a sunflower shape. The preferred scheme has high rigidity and light weight.
Preferably, the fastening bolt is an aluminum profile fastening bolt. This preferred scheme, the structure is mature, connect reliable stable.
Preferably, after the power battery module is placed on the lower case of the power battery case, the distance between the side surface of the power battery module and the corresponding surface of the lower case of the power battery case is greater than or equal to 2.5 mm and less than or equal to 3 mm. The preferred embodiment is advantageous for improving the compactness of the present invention.
In summary, the invention provides a lower case shell of a power battery case body, and provides a mode of fixedly connecting a power battery module and an upper plate surface of a module glue coating plate together by using epoxy resin glue and filling the epoxy resin glue between the side surface of the lower end of the power battery module and the corresponding side surfaces of a third section of a side beam and a partition section bar.
A connecting step of a lower box shell of a power battery box body and a power battery is as follows:
the method comprises the following steps: preparing a lower box shell of a power battery box body, a power battery module 8 and epoxy resin glue 9;
step two: spraying epoxy resin glue on the surface of the module glue spreading plate;
step three: placing the power battery module 8 on a module glue spreading plate 6 with epoxy resin glue sprayed on the surface;
step four: epoxy resin glue is sprayed between the periphery of the power battery module 8 and corresponding components of the lower case shell of the power battery case body.
The step of connecting the lower box shell of the power battery box body with the power battery is suitable for mounting and connecting the lower box shell of the power battery box body with the power battery, has clear steps, and can well ensure the reliable connection of the lower box shell of the power battery box body with the power battery.
Drawings
FIG. 1: the cross-sectional schematic diagram of the structure of the lower box shell of the power battery box body;
in the figure: the lower shell body 1, the box body boundary beam 2, the boundary beam first section 2.1, the boundary beam second section 2.2, the boundary beam third section 2.3, the boundary beam fourth section 2.4, the boundary beam fifth section 2.5, the boundary beam sixth section 2.6, the box body reinforcing longitudinal beam I3, the box body reinforcing longitudinal beam II 4, the partition section bar 5, the module glue coating plate 6, the fastening bolt 7, the power battery module 8 and the epoxy resin glue 9.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The embodiment of the lower case shell of the power battery case body is as follows:
as shown in figure 1, the invention relates to a lower box shell of a power battery box, which comprises a lower shell body 1, a box body side beam 2, a box body reinforcing longitudinal beam I3, a box body reinforcing longitudinal beam II 4, a partition section bar 5, a module glue coating plate 6 and a fastening bolt 7; the lower shell of the power battery box body is integrally of a bilateral symmetry structure; wherein, the cross section of subregion section bar 5 is the day type, and fastening bolt 7 is aluminium alloy fastening bolt.
The box body boundary beam 2 is formed into a ring by connecting a plurality of sections of short boundary beams end to end, and the section perpendicular to the length direction of the short boundary beams comprises a first section 2.1 of the boundary beam, a second section 2.2 of the boundary beam, a third section 2.3 of the boundary beam, a fourth section 2.4 of the boundary beam, a fifth section 2.5 of the boundary beam and a sixth section 2.6 of the boundary beam; the cross sections of the first section 2.1, the third section 2.3 and the fifth section of the boundary beam are in an outward inclining state with the outer end higher than the inner end, and the cross sections of the second section 2.2, the fourth section 2.4 and the sixth section 2.6 are in a horizontal state; the first section 2.1 of the boundary beam is positioned at the top, the sixth section 2.6 of the boundary beam is positioned at the bottom, and the first section 2.1 of the boundary beam, the second section 2.2 of the boundary beam, the third section 2.3 of the boundary beam, the fourth section 2.4 of the boundary beam, the fifth section 2.5 of the boundary beam and the sixth section 2.6 of the boundary beam are sequentially connected into a whole through corresponding arc sections; the outer surface of the first section 2.1 of the boundary beam, the lower surfaces of the fourth section 2.4 of the boundary beam and the sixth section 2.6 of the boundary beam are respectively welded with the surface of the corresponding part of the lower shell body 1;
the box body reinforcing longitudinal beam I3 and the box body reinforcing longitudinal beam II 4 are both in the front-back direction, the box body reinforcing longitudinal beam I3 is provided with three, the box body reinforcing longitudinal beam II 4 is provided with two, the left-right direction sections of the box body reinforcing longitudinal beam I3 and the box body reinforcing longitudinal beam II 4 are in inverted U shapes, and the lower ends of two side walls of the inverted U shapes are welded with the lower shell body 1; the corresponding parts of the module glue coating plate 6 are respectively placed on the upper surfaces of the fourth section 2.4 of the boundary beam, the first box body reinforcing longitudinal beam 3 and the second box body reinforcing longitudinal beam 4 and fixedly connected with the upper surfaces;
the two partition sectional materials 5 which move forwards and backwards are fixedly connected with the corresponding box body reinforcing longitudinal beam II 4 through a plurality of bolts respectively so as to divide the module glue coating plate into three areas for installing power battery modules with the same size, and the corresponding part of the module glue coating plate 6 is clamped between the corresponding partition sectional material 5 and the box body reinforcing longitudinal beam II 4; the three box body reinforcing longitudinal beams I3 correspond to an area for installing the power battery module respectively; when the power battery module 8 is installed, the periphery and the lower surface of the lower end of the power battery module 8 are fixedly connected with corresponding components forming the lower box shell of the power battery box body through epoxy resin glue 9.
Preferably, after the power battery module 8 is placed in the lower case of the power battery case, the distance between the side surface of the power battery module and the corresponding surface of the lower case of the power battery case is greater than or equal to 2.5 mm and less than or equal to 3 mm. Preferably, the lower ends of two side walls of the inverted U-shaped cross section of the box body reinforcing longitudinal beam I3 and the box body reinforcing longitudinal beam II 4 are bent outwards and welded with the corresponding part of the lower shell body 1.
The embodiment of the connection step of the lower box shell of the power battery box body and the power battery comprises the following steps:
the method comprises the following steps: preparing a lower box shell of a power battery box body, a power battery module 8 and epoxy resin glue 9;
step two: spraying epoxy resin glue on the surface of the module glue spreading plate;
step three: placing the power battery module 8 on a module glue spreading plate 6 with epoxy resin glue sprayed on the surface;
step four: epoxy resin glue is sprayed between the periphery of the power battery module 8 and corresponding components of the lower case shell of the power battery case body.
The above embodiments are merely preferred embodiments of the present invention, and not intended to limit the structure and scope of the invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes in the shapes, structures and design objectives of the present invention are intended to be covered by the present invention, and all such equivalent changes are intended to be protected by the present invention.

Claims (6)

1. The utility model provides a case shell under power battery box, characterized by: the box body side beam structure comprises a lower shell body (1), a box body side beam (2), a box body reinforcing longitudinal beam I (3), a box body reinforcing longitudinal beam II (4), a partition sectional material (5), a module glue coating plate (6) and a fastening bolt (7); the lower shell of the power battery box body is integrally of a bilateral symmetry structure; wherein the content of the first and second substances,
the box body boundary beam is formed by connecting a plurality of sections of short boundary beams end to enclose a ring, and the section perpendicular to the length direction of the short boundary beams comprises a first section (2.1) of the boundary beam, a second section (2.2) of the boundary beam, a third section (2.3) of the boundary beam, a fourth section (2.4) of the boundary beam, a fifth section (2.5) of the boundary beam and a sixth section (2.6) of the boundary beam; the cross sections of the first section of the edge beam, the third section of the edge beam and the fifth section of the edge beam are in an outward inclining state with the outer end higher than the inner end, and the cross sections of the second section of the edge beam, the fourth section of the edge beam and the sixth section of the edge beam are in a horizontal state integrally; the first section of the boundary beam, the second section of the boundary beam, the third section of the boundary beam, the fourth section of the boundary beam, the fifth section of the boundary beam and the sixth section of the boundary beam are sequentially connected into a whole; the outer surface of the first section of the boundary beam, the lower surfaces of the fourth section of the boundary beam and the sixth section of the boundary beam are respectively welded with the surfaces of the corresponding parts of the lower shell body;
the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam are in the front-back direction, the first box body reinforcing longitudinal beam is provided with three box body reinforcing longitudinal beams, the second box body reinforcing longitudinal beam is provided with two box body reinforcing longitudinal beams, the left-right direction sections of the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam are in inverted U shapes, and the lower ends of two side walls of the inverted U shapes are welded with the lower shell body; the corresponding parts of the module glue coating plates are respectively placed on the upper surfaces of the fourth section of the side beam, the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam and are fixedly connected with the upper surfaces of the fourth section of the side beam, the first box body reinforcing longitudinal beam and the second box body reinforcing longitudinal beam;
the two partition sectional materials in the front and back directions are fixedly connected with the corresponding box body reinforcing longitudinal beam II through a plurality of bolts respectively so as to divide the module glue coating plate into three areas for installing the power battery modules with the same size, and the corresponding parts of the module glue coating plate are clamped between the corresponding partition sectional materials and the box body reinforcing longitudinal beam II; the first box body reinforcing longitudinal beams correspond to an area for installing the power battery module respectively; when the power battery module (8) is installed, the periphery and the lower surface of the lower end of the power battery module are fixedly connected with corresponding components forming the lower box shell of the power battery box body through epoxy resin glue (9).
2. The lower box shell of the power battery box body as claimed in claim 1, which is characterized in that: the first section (2.1) of the boundary beam, the second section (2.2) of the boundary beam, the third section (2.3) of the boundary beam, the fourth section (2.4) of the boundary beam, the fifth section (2.5) of the boundary beam and the sixth section (2.6) of the boundary beam are sequentially connected through corresponding arc sections.
3. The lower box shell of the power battery box body as claimed in claim 1, which is characterized in that: the cross section of the sectional material (5) is in a shape of a sun.
4. The lower box shell of the power battery box body as claimed in claim 1, which is characterized in that: the fastening bolt (7) is an aluminum profile fastening bolt.
5. The lower box shell of the power battery box body as claimed in claim 1, which is characterized in that: after the power battery module (8) is placed on the lower box shell of the power battery box body, the distance between the side surface of the power battery module and the corresponding surface of the lower box shell of the power battery box body is more than or equal to 2.5 millimeters and less than or equal to 3 millimeters.
6. A step of connecting a lower box shell of a power battery box body with a power battery, wherein the lower box shell of the power battery box body is any one of the lower box shells of the power battery box bodies in claims 1-5, and is characterized in that:
the method comprises the following steps: preparing a lower box shell of a power battery box body, a power battery module (8) and epoxy resin glue (9);
step two: spraying epoxy resin glue on the surface of the module glue spreading plate;
step three: placing the power battery module (8) on a module glue spreading plate (6) with epoxy resin glue sprayed on the surface;
step four: epoxy resin glue is sprayed between the periphery of the power battery module (8) and corresponding components of the lower case shell of the power battery case body.
CN202011278684.3A 2020-11-16 2020-11-16 Power battery box lower case and connection step thereof with power battery Pending CN112670649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011278684.3A CN112670649A (en) 2020-11-16 2020-11-16 Power battery box lower case and connection step thereof with power battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011278684.3A CN112670649A (en) 2020-11-16 2020-11-16 Power battery box lower case and connection step thereof with power battery

Publications (1)

Publication Number Publication Date
CN112670649A true CN112670649A (en) 2021-04-16

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CN202011278684.3A Pending CN112670649A (en) 2020-11-16 2020-11-16 Power battery box lower case and connection step thereof with power battery

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CN (1) CN112670649A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109742281A (en) * 2018-12-27 2019-05-10 宁德时代新能源科技股份有限公司 Battery box
CN208923253U (en) * 2018-12-14 2019-05-31 蜂巢能源科技有限公司 The lower case and battery pack of battery pack
CN209389089U (en) * 2018-12-21 2019-09-13 国联汽车动力电池研究院有限责任公司 Battery module frame structure
CN210200841U (en) * 2019-09-30 2020-03-27 蜂巢能源科技有限公司 Power battery pack with combinable battery module and power automobile chassis assembly thereof
CN210607540U (en) * 2019-12-11 2020-05-22 常州普莱德新能源电池科技有限公司 Immersed module device and cooling structure of power battery system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208923253U (en) * 2018-12-14 2019-05-31 蜂巢能源科技有限公司 The lower case and battery pack of battery pack
CN209389089U (en) * 2018-12-21 2019-09-13 国联汽车动力电池研究院有限责任公司 Battery module frame structure
CN109742281A (en) * 2018-12-27 2019-05-10 宁德时代新能源科技股份有限公司 Battery box
CN210200841U (en) * 2019-09-30 2020-03-27 蜂巢能源科技有限公司 Power battery pack with combinable battery module and power automobile chassis assembly thereof
CN210607540U (en) * 2019-12-11 2020-05-22 常州普莱德新能源电池科技有限公司 Immersed module device and cooling structure of power battery system

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