CN114361693A - Power battery lower box body - Google Patents
Power battery lower box body Download PDFInfo
- Publication number
- CN114361693A CN114361693A CN202210014296.7A CN202210014296A CN114361693A CN 114361693 A CN114361693 A CN 114361693A CN 202210014296 A CN202210014296 A CN 202210014296A CN 114361693 A CN114361693 A CN 114361693A
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- China
- Prior art keywords
- power battery
- box body
- lower box
- cooling plate
- cross
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 claims abstract description 30
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000010354 integration Effects 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a lower box body of a power battery, which comprises a cooling plate and a frame body fixedly connected with the cooling plate, wherein the frame body comprises two opposite side walls, two opposite end walls, a cross beam and a longitudinal beam which are connected between the two side walls, the two end walls are respectively arranged at the two ends of the side walls, the cross beams are arranged in parallel at intervals, the longitudinal beams are arranged in parallel at intervals, the cross beams and the longitudinal beams are vertically crossed, so that the space enclosed by the cooling plate, the side walls and the end walls is divided into a plurality of accommodating cavities, and a plurality of connecting positions are arranged on one end wall. In the lower box body of the power battery, the accommodating cavity is defined by arranging the cross beams and the longitudinal beams, so that a bottom plate is omitted, the structure of the lower box body of the power battery is simplified, the weight of a core stack can be greatly reduced, the integration level and the energy density of the power battery are improved, and the cooling effect can be enhanced; various electronic devices can be installed in a centralized manner, subsequent maintenance and replacement of the electronic devices are facilitated, and the maintenance convenience of the power battery is greatly improved.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a lower box body of a power battery.
Background
Under the support of the country and the benefit of the market, the power lithium battery industry develops very rapidly, the application of the power lithium battery industry is expanded to the fields of electric buses, electric cars, micro buses, energy storage and the like, and along with the large-scale application of the power lithium battery, the increasingly prominent problems are more and more, and generally, the power lithium battery industry comprises the aspects of fixing, heat dissipation, electric connection, sampling and positive and negative electrode output of a module.
At present, the power battery is generally assembled by adopting independent standard VDA (German automobile industry Association) size modules, and the VDA standard modules have complex structures, lower integration level and lower energy density.
Disclosure of Invention
The invention aims to provide a lower box body of a power battery, which has higher integration level and higher energy density.
The invention provides a power battery lower box body which comprises a cooling plate and a frame body fixedly connected with the cooling plate, wherein the frame body comprises two opposite side walls, two opposite end walls, a cross beam and a longitudinal beam, the cross beam and the longitudinal beam are connected between the two side walls, the two end walls are respectively arranged at two ends of the side walls, the cross beams are arranged in parallel at intervals, the longitudinal beams are arranged in parallel at intervals, the cross beams are vertically intersected with the longitudinal beams, so that a space defined by the cooling plate, the side walls and the end walls is divided into a plurality of accommodating cavities, the accommodating cavities are used for accommodating a core stack, and a plurality of connecting positions are arranged on one end wall to intensively install a plurality of electric devices.
In one embodiment, an insulating film is arranged on one side of the cooling plate facing the electric core stack; or the cooling plate is provided with an anti-overflow glue film corresponding to the edge of the electric core stack.
In one embodiment, the top surface and the side surface of the end wall provided with the connecting positions are respectively provided with the connecting positions, the connecting positions on the top surface are used for installing at least one of a battery protection box, a battery management system, a voltage converter, a vehicle-mounted charging module and an intelligent fuse driving board, and the connecting positions on the side surface are used for installing a slave control acquisition unit.
In one embodiment, an avoiding groove is formed in the side wall of the cross beam facing the accommodating cavity.
In one embodiment, the cross beams of the lower box body comprise a first cross beam and a second cross beam, and the width of the first cross beam is greater than that of the second cross beam.
In one embodiment, a limiting block is arranged at the top of the first cross beam; or the second cross beam is close to the end wall and faces the side wall of the accommodating cavity, and a guide groove is formed in the side wall of the accommodating cavity so as to be matched with a guide limiting structure on an end plate of the electric core stack.
In one embodiment, the end wall and the second cross beam are spaced apart by a certain distance, and a support column is arranged between the end wall and the second cross beam.
In one embodiment, the end wall is provided with a mounting block, and the mounting block is provided with a plug-in mounting hole and a plug-in via hole.
In one embodiment, the lower box further comprises a guard plate, and the guard plate is arranged on one side of the cooling plate, which is far away from the frame body.
In one embodiment, the top of the longitudinal beam is provided with a connecting column which is fixedly connected to an upper box body of the power battery assembly.
In the lower box body of the power battery, the cross beam and the longitudinal beam are arranged to define the accommodating cavity for accommodating the battery cell stack, the battery cell stack does not need to be fixed by arranging an excessive structure, and the battery cell stack is directly contacted with the cooling plate, so that a bottom plate of the lower box body is omitted, the lower box body part of the power battery is less, the structure of the lower box body of the power battery is simplified, the weight of the battery cell stack can be greatly reduced, the integration level and the energy density of the lower box body of the power battery are improved, and the cooling effect can be enhanced; in addition, a plurality of connecting positions are arranged on one end wall, so that various electronic devices can be intensively arranged on the same end wall, the subsequent maintenance and replacement of the electronic devices are facilitated, and the maintenance convenience of the power battery is greatly improved.
Drawings
Fig. 1 is an exploded view of a lower case of a power battery according to an embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of a lower box of a power battery according to an embodiment of the invention. Referring to fig. 1, in the present embodiment, the power battery lower case 11 includes a cooling plate 112 and a frame 113 fixedly connected to the cooling plate 112. The frame 113 includes two opposite side walls 114, two opposite end walls 115, a cross beam 116 and a longitudinal beam 117 connected between the two side walls 114, and the two end walls 115 are respectively disposed at two ends of the side walls 114. The plurality of cross beams 116 are arranged in parallel at intervals, the plurality of longitudinal beams 117 are arranged in parallel at intervals, and the cross beams 116 and the longitudinal beams 117 are perpendicularly intersected, so that the space enclosed by the cooling plate 112, the side walls 114 and the end walls 115 of the lower box body 11 of the power battery is divided into a plurality of accommodating cavities 119, the accommodating cavities 119 are used for accommodating battery core stacks, and the battery core stacks are arranged on the surface of the cooling plate 112. One of the end walls 115 is provided with a plurality of connection sites to centrally mount electronic devices such as a battery protection Box (BDU), a Battery Management System (BMS), a voltage converter (DCDC), an on-board charging module (OBC), and an intelligent fuse driver board. In the present embodiment, each receiving cavity 119 is used to receive one electrical core stack, but is not limited thereto. Wherein "plurality" means two or more.
In the embodiment of the invention, the cross beam and the longitudinal beam are arranged to define the accommodating cavity for accommodating the battery cell stack, the battery cell stack is not required to be fixed by arranging an excessive structure, and the battery cell stack is directly contacted with the cooling plate, so that a bottom plate of a lower box body is omitted, the lower box body part of the power battery is less, the structure of the lower box body of the power battery is simplified, the weight of the battery cell stack can be greatly reduced, the integration level and the energy density of the lower box body of the power battery are improved, and the cooling effect can be enhanced; in addition, a plurality of connecting positions are arranged on one end wall, so that various electronic devices can be intensively arranged on the same end wall, the subsequent maintenance and replacement of the electronic devices are facilitated, and the maintenance convenience of the power battery is greatly improved.
In this embodiment, an insulating film is provided on a side of the cooling plate 112 facing the core stack 15 to ensure insulation between the core stack 15 and the cooling plate 112. The cooling plate 112 is provided with an anti-overflow glue film corresponding to the edge of the cell stack.
In this embodiment, the cooling plate 112 may be made of an integrated brazing plate, but is not limited thereto, and may be made of a split brazing plate, for example. Specifically, the thickness of the cooling plate 112 may be 5mm to 8mm, but is not limited thereto.
In this embodiment, the frame 113 may be made of aluminum profile by welding. It is understood that the frame 113 may also be manufactured by casting aluminum, a profile, or the like.
In this embodiment, the top surface and the side surface of one of the two end walls 115 are respectively provided with a connection position, the connection position on the top surface is used for installing a battery protection Box (BDU), a Battery Management System (BMS), a voltage converter (DCDC), an on-vehicle charging module (OBC) and an intelligent fuse driving board, and the connection position on the side surface is used for installing a slave control acquisition unit. It is understood that the connection sites on the top surface may also be used to mount one, two or more of a battery protection Box (BDU), a Battery Management System (BMS), a voltage converter (DCDC), an on-board charging module (OBC), and an intelligent fuse driver board.
In this embodiment, the cross member 116 of the power battery lower case 11 includes a first cross member 121 and a second cross member 123, and the width of the first cross member 121 is greater than the width of the second cross member 123. Specifically, the width of the first beam 121 may be 110mm to 120mm, and the width of the second beam 123 may be 30mm to 35 mm. Specifically, the first cross member 121 is located between two second cross members 123, and the two second cross members 123 are disposed near two ends of the power battery lower case 11. Through setting up crossbeam 116, still can increase the bulk strength of box under the power battery to reinforcing vehicle side collision's security, through setting up the width of first crossbeam 121 broad, can strengthen vehicle side collision security better. In particular, the cross beam 116 may be made of a profile.
In this embodiment, the top of the first cross beam 121 is provided with a limiting block 1212, so as to increase the overall strength of the lower box of the power battery, thereby enhancing the safety of the side collision of the vehicle. Specifically, two ends of the top of the first beam 121 are respectively provided with two limiting blocks 1212. The stop block 1212 may be mounted on the first beam 121 by a bolt. Of course, the limiting block 1212 may also be fixed to the first cross member 121 by welding or other methods, or may be integrally formed with the first cross member 121. More specifically, the height of the limiting block 1212 may be 50mm to 55mm, the width may be 55mm to 65mm, and the length may be 95mm to 100mm, but not limited thereto.
In this embodiment, the side wall of the cross beam 116 facing the accommodating cavity 119 is provided with an avoiding groove 1162. By providing the avoiding groove 1162, the core stack can be avoided when the core stack is grasped by the manipulator and placed in the accommodating cavity 119. More specifically, three spaced apart avoidance slots 1162 are formed in the side wall of the cross member 116 facing each of the receiving cavities 119. The avoiding groove 1162 may have a depth of 10mm to 15mm and a width of 25mm to 30mm, but is not limited thereto.
In this embodiment, the second cross beam 123 is close to the end wall 115, and a guide groove 1164 is further formed on a side wall of the second cross beam facing the accommodating cavity 119, so as to cooperate with a guide limiting structure on an end plate of the cell stack to guide and limit the cell stack.
In this embodiment, the width of the longitudinal beam 117 may be 20mm to 35 mm. Through setting up longeron 117, also can promote the intensity of power battery lower box. In particular, the longitudinal beam 117 may be made of a profile.
In this embodiment, the top of the longitudinal beam 117 is provided with a connecting post 1172 for fixedly connecting to the upper box of the power battery assembly, so as to enhance the rigidity of the upper box. Specifically, threaded holes are formed in the connecting column 1172, and the upper box body and the lower box body 11 can be fixedly connected through bolts.
In this embodiment, three cross beams 116 and two longitudinal beams 117 divide the space inside the lower power battery case 11 into six accommodating cavities 119. The overall width of the lower box body of the power battery can be 1450 mm-1550 mm, and the length of the lower box body of the power battery can be 2100 mm-2200 mm.
In this embodiment, the end wall 115 and the second cross member 123 are spaced apart, and a support column 125 is disposed between the end wall 115 and the second cross member 123. With this structure, the front collision safety of the vehicle can be improved.
Specifically, the end wall 115 is provided with a mounting block 126, and the mounting block 126 is provided with a plug-in mounting hole and a plug-in through hole for mounting a plug-in. This ensures sealing while preventing the insert harness from interfering with the lower case 11. The mounting block 126 may be embodied as an aluminum casting block fixedly attached to the end wall 115 by a weldable means.
Specifically, the lower power battery box 11 further includes a guard plate 127, and the guard plate 127 is disposed on a side of the cooling plate 112 away from the core stack 15. Through setting up backplate 127, the impact that the box bottom received under the protection power battery increases battery security.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The lower box body of the power battery is characterized by comprising a cooling plate (112) and a frame body (113) fixedly connected to the cooling plate (112), wherein the frame body (113) comprises two opposite side walls (114), two opposite end walls (115), a cross beam (116) and a longitudinal beam (117) connected between the two side walls (114), the two end walls (115) are respectively arranged at two ends of the side walls (114), the cross beams (116) are arranged in parallel at intervals, the longitudinal beams (117) are arranged in parallel at intervals, the cross beams (116) and the longitudinal beams (117) are vertically intersected, so that a space enclosed by the cooling plate (112), the side walls (114) and the end walls (115) is divided into a plurality of accommodating cavities (119), the accommodating cavities (119) are used for accommodating a core stack (15), one of the end walls (115) is provided with a plurality of connecting positions, to collectively mount a plurality of electric devices.
2. The lower power battery box according to claim 1, characterized in that an insulating film is provided on the side of the cooling plate (112) facing the electrical core stack (15); or an anti-overflow glue film is arranged on the cooling plate (112) corresponding to the edge of the electric core stack (15).
3. The lower power battery box according to claim 1, wherein the end wall (115) provided with the connection sites is provided with the connection sites on a top surface and a side surface, the connection sites on the top surface are used for installing at least one of a battery protection Box (BDU), a Battery Management System (BMS), a voltage converter (DCDC), an on-board charging module (OBC) and an intelligent fuse driving board, and the connection sites on the side surface are used for installing a slave acquisition unit.
4. The lower box of power batteries according to claim 1, characterized in that the lateral wall of the cross beam (116) facing the housing cavity (119) is provided with an avoiding groove (1162).
5. The power battery lower case according to claim 1, wherein the cross member (116) of the lower case (11) includes a first cross member (121) and a second cross member (123), and a width of the first cross member (121) is greater than a width of the second cross member (123).
6. The power battery lower box body as claimed in claim 5, wherein a limiting block (1212) is arranged at the top of the first cross beam (121); or the second cross beam (123) is close to the end wall (115) and is provided with a guide groove (1164) on the side wall facing the accommodating cavity (119) so as to be matched with a guide limiting structure on an end plate of the electric core stack.
7. The power battery lower box according to claim 5, characterized in that the end wall (115) and the second cross member (123) are spaced apart by a certain distance, and a support column (125) is provided between the end wall (115) and the second cross member (123).
8. The power battery lower box body as claimed in claim 1, wherein a mounting block (126) is arranged on the end wall (115), and a plug-in mounting hole and a plug-in through hole are arranged on the mounting block (126).
9. The power battery lower box body as claimed in claim 1, wherein the lower box body (11) further comprises a guard plate (127), and the guard plate (127) is arranged on one side of the cooling plate (112) far away from the frame body (113).
10. The power battery lower box body as claimed in claim 1, characterized in that the top of the longitudinal beam (117) is provided with a connecting column (1172) for fixedly connecting to the upper box body of the power battery assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210014296.7A CN114361693A (en) | 2022-01-06 | 2022-01-06 | Power battery lower box body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210014296.7A CN114361693A (en) | 2022-01-06 | 2022-01-06 | Power battery lower box body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114361693A true CN114361693A (en) | 2022-04-15 |
Family
ID=81107045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210014296.7A Pending CN114361693A (en) | 2022-01-06 | 2022-01-06 | Power battery lower box body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114361693A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018215954A1 (en) * | 2018-09-19 | 2020-03-19 | Audi Ag | Motor vehicle and battery |
| US20200127254A1 (en) * | 2018-10-19 | 2020-04-23 | Toyota Jidosha Kabushiki Kaisha | Power storage unit and power storage device |
| CN112271368A (en) * | 2020-10-12 | 2021-01-26 | 东风时代(武汉)电池系统有限公司 | High energy density power battery package integrated configuration and new energy automobile |
| CN113300024A (en) * | 2021-05-21 | 2021-08-24 | 广州小鹏汽车科技有限公司 | Power battery liquid cooling device, power battery system and vehicle |
-
2022
- 2022-01-06 CN CN202210014296.7A patent/CN114361693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018215954A1 (en) * | 2018-09-19 | 2020-03-19 | Audi Ag | Motor vehicle and battery |
| US20200127254A1 (en) * | 2018-10-19 | 2020-04-23 | Toyota Jidosha Kabushiki Kaisha | Power storage unit and power storage device |
| CN112271368A (en) * | 2020-10-12 | 2021-01-26 | 东风时代(武汉)电池系统有限公司 | High energy density power battery package integrated configuration and new energy automobile |
| CN113300024A (en) * | 2021-05-21 | 2021-08-24 | 广州小鹏汽车科技有限公司 | Power battery liquid cooling device, power battery system and vehicle |
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Address after: 510000 No.8 Songgang street, Cencun, Tianhe District, Guangzhou City, Guangdong Province Applicant after: GUANGZHOU XIAOPENG MOTORS TECHNOLOGY Co.,Ltd. Address before: 510000 No. 8, Songgang Avenue, Cencun, Tianhe District, Guangzhou, Guangdong Applicant before: GUANGZHOU XIAOPENG MOTORS TECHNOLOGY Co.,Ltd. |