CN218827435U - Low-temperature heat-insulation structure of power battery - Google Patents
Low-temperature heat-insulation structure of power battery Download PDFInfo
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- CN218827435U CN218827435U CN202221859317.7U CN202221859317U CN218827435U CN 218827435 U CN218827435 U CN 218827435U CN 202221859317 U CN202221859317 U CN 202221859317U CN 218827435 U CN218827435 U CN 218827435U
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- cooling plate
- temperature heat
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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 provides a power battery low temperature insulation construction, it includes: a liquid cooling plate, a first connection portion; the liquid cooling plate is arranged at the bottom of the power battery pack; the lower surface of the liquid cooling plate is connected with the bottom guard plate through a first connecting part; the first connection portion includes: a heat insulating sheet. The utility model discloses a power battery low temperature insulation construction sets up the heat shield on the main heat dissipation route of power battery under the CTC system, is applicable to the CTC system, has reduced power battery's heat dissipation, can satisfy its low temperature heat preservation demand.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a power battery low temperature insulation construction.
Background
The conventional power battery is limited by the material characteristics of the power battery, and the performance of the power battery is greatly reduced under a plurality of medium and low temperature application scenes, so that the discharge capacity and the power characteristics of a battery system are greatly hindered; the current low temperature heat preservation performance of independent battery package mainly focuses on carrying out the bottom to the shutoff of box section bar port, the heat insulating mattress between liquid cooling board and the lower box and keep warm, increases thermal-insulated heat preservation cotton between module and upper cover. The measures are that an internal additional physical heat preservation measure is added to the traditional battery pack, so that the temperature drop rate of the battery pack is reduced, and the initial temperature of a single-time driving is improved. But traditional battery package heat preservation scheme can not satisfy CTC battery system structure heat preservation demand, and traditional battery package belongs to independent individual with the white automobile body of formula of bearing, only needs to do inside and outside heat preservation with the battery package, just can guarantee holistic low temperature thermal insulation performance. And then the vehicle body is connected with a body-in-white bolt. However, the battery is integrated as a part of the chassis under the CTC system, and this method cannot meet the actual low temperature insulation performance requirements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power battery low temperature insulation construction to the low temperature that solves current power battery keeps warm and is not applicable to power battery's under the CTC system low temperature heat retaining problem.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model provides a power battery low temperature insulation construction, it includes: a liquid cooling plate, a first connection portion;
the liquid cooling plate is arranged at the bottom of the power battery pack;
the lower surface of the liquid cooling plate is connected with the bottom guard plate through the first connecting part;
the first connection portion includes: a heat insulating sheet.
Preferably, the method further comprises the following steps: and the upper surface of the liquid cooling plate is connected with the transverse beam and the longitudinal beam of the power battery pack through the second connecting part.
Preferably, the second connection portion includes: welding a gasket;
and the liquid cooling plate and the transverse longitudinal beam are penetratingly welded through the welding gasket.
Preferably, the welding gasket is an aluminum sheet.
Preferably, the size of the welding gasket is any value between 1mm and 2 mm.
Preferably, the number of the welding pads comprises a plurality of welding pads, and different welding pads are distributed at different positions of the liquid cooling plate.
Preferably, the second connection portion includes: a bolt;
the liquid cooling plate is connected with the transverse longitudinal beam through the bolt.
Preferably, the bottom guard plate is provided with an upward bulge;
the lower surface of liquid cooling board passes through first connecting portion links to each other with end backplate specifically does: the lower surface of the liquid cooling plate is connected with the protrusion through the first connecting portion.
Preferably, the heat insulation sheet is a heat insulation epoxy resin sheet.
Preferably, the method further comprises the following steps: the structural adhesive assembly is arranged on the liquid cooling plate;
the structural adhesive assembly comprises: the first structural adhesive part and the second structural adhesive part;
the first structural adhesive part is positioned in the area of the liquid cooling plate opposite to the battery core in the power battery pack;
the second structural adhesive part is positioned at the position of the liquid cooling plate, which is in contact with the transverse beam and the longitudinal beam of the power battery pack;
the heat conductivity coefficient of the second structural adhesive part is smaller than that of the first structural adhesive part.
Preferably, the method further comprises the following steps: a low thermal conductive adhesive portion;
the low heat-conducting glue portion is arranged between the transverse beam and the longitudinal beam of the power battery pack and the frame.
The utility model provides a power battery low temperature insulation construction through set up the heat shield between the lower surface at the liquid cooling board and end backplate, prevents that the inside heat of power battery package from passing through the liquid cooling board to end backplate transmission heat leakage, has reduced the heat dissipation, and then makes the heat stay more inside the power battery package, is applicable to power battery's low temperature heat preservation under the CTC system, can satisfy its low temperature heat preservation demand.
The utility model discloses an in the alternative, the second connecting portion include: the upper surface of the liquid cooling plate is penetrated and welded with the transverse and longitudinal beams through the welding gaskets, the welding gaskets with small areas penetrate and weld, the liquid cooling plate and the transverse and longitudinal beams are changed into local small-surface contact, the contact area of the liquid cooling plate and the transverse and longitudinal beams is greatly reduced, the heat conduction is further reduced, and the heat loss is reduced.
The utility model discloses an in the alternative, end backplate is provided with ascending arch, and the lower surface of liquid cooling board links to each other with the arch through first connecting portion, and the liquid cooling board only contacts with the arch of end backplate, has reduced the area of contact with end backplate, has further reduced thermal conduction, has reduced thermal scattering and disappearing.
The utility model discloses an in the alternative, through setting up the gluey subassembly of structure, the subassembly is glued to the structure includes: the first structural adhesive part and the second structural adhesive part; the first structural adhesive part is positioned in the area of the liquid cooling plate, which is opposite to the battery core in the power battery pack; the second structural adhesive part is positioned at the position of the liquid cooling plate, which is contacted with the transverse beam and the longitudinal beam of the power battery pack; the heat conductivity coefficient of the second structural adhesive part is smaller than that of the first structural adhesive part, namely the heat conductivity coefficient of the first structural adhesive part is high, so that the heat emitted by the battery cell can be led out to the liquid cooling plate when the power battery works normally, and further the heat is led out through the liquid cooling plate; in addition, the second structural adhesive part has low heat conductivity coefficient, so that heat is prevented from being conducted to the transverse beams when the power battery does not work, and heat loss is further reduced.
The utility model discloses an among the alternative, through set up low heat conducting glue portion between the indulge in power battery package and frame, further reduced the heat in the power battery package to the indulge, and then to the frame conduction, further reduced thermal loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic view of a low-temperature heat preservation structure of a power battery according to an embodiment of the present invention;
fig. 2 is a schematic view of a second connection portion of the low-temperature thermal insulation structure of the power battery according to an embodiment of the present invention;
fig. 3 is a schematic view of a second connection portion of a low-temperature thermal insulation structure of a power battery according to another embodiment of the present invention;
fig. 4 is a schematic view of a structural adhesive assembly of a low-temperature thermal insulation structure of a power battery according to another embodiment of the present invention;
fig. 5 is a schematic view of a low thermal conductive adhesive part of a low-temperature thermal insulation structure of a power battery according to another embodiment of the present invention;
description of reference numerals:
1-a liquid-cooling plate, wherein,
2-a bottom guard plate, wherein,
21-a bump;
3-a heat-insulating sheet, wherein,
4-a transverse longitudinal beam and a longitudinal beam,
5-welding the gasket by welding the welding rod,
6-a bolt, wherein the bolt is arranged on the bolt,
7-a heat-insulating sheet, wherein,
8-the first structural glue portion,
9-a second structural glue portion,
10-a low thermal conductive adhesive part,
11-a vehicle frame, wherein the vehicle frame,
12-bolt.
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 efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "upper portion", "lower portion", "upper end", "lower surface", "upper surface", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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, "plurality" means a plurality, such as two, three, four, etc., unless specifically limited otherwise.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected" and the like are to be understood broadly, and may for example be fixedly connected, detachably connected, or integrated; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In one embodiment, a low-temperature thermal insulation structure for a power battery is provided, which includes: the liquid cooling plate 1 and the first connecting part; the liquid cooling plate 1 is arranged at the bottom of the power battery pack; the lower surface of the liquid cooling plate is connected with the bottom guard plate 2 through a first connecting part; the first connection portion includes: please refer to fig. 1 for the heat insulation sheet 3.
Set up the heat shield on the main heat dissipation route of power battery under the CTC system, through the setting of heat shield, prevent that the inside heat of power battery package from passing through liquid cold plate to the backplate transmission heat leakage, reduced the heat dissipation, and then make the heat stay more inside the power battery package, be applicable to the low temperature heat preservation of power battery under the CTC system.
In one embodiment, the low-temperature heat preservation structure of the power battery further comprises: the upper surface of the liquid cooling plate is connected to the longitudinal and transverse beams 4 of the power battery pack through a second connecting portion, please refer to fig. 1.
In one embodiment, the second connection portion includes: welding a gasket 5; the liquid cooling plate 1 and the longitudinal beam 4 are penetratingly welded by a welding gasket 5, please refer to fig. 2.
In the prior art, the liquid cooling plate is connected with the lower surface of the cross girder interface through the FDS nail, and the liquid cooling plate is in large-surface contact with the lower surface of the cross girder interface due to the locking force of the FDS, so that more heat is dissipated. In the embodiment, the soldering is penetrated by the soldering pad 5, so that the contact area is reduced, and further, the heat loss is reduced.
Through the setting of heat shield, welded gasket, blocked most route that the heat derived for the heat can't transmit away, and no way can run, and furthest's assurance heat is preserved inside.
In one embodiment, the bonding pad may be an aluminum sheet.
In one embodiment, the size of the welding pad is any value between 1mm and 2mm, and the contact area between the liquid cooling plate 1 and the transverse and longitudinal beams 4 can be further reduced by the smaller welding pad.
In one embodiment, the number of bonding pads 5 includes a plurality of bonding pads, and different bonding pads are distributed on different positions of the liquid-cooled plate for more stable connection.
In one embodiment, the second connection portion includes: a bolt 6; the liquid cooling plate 1 is connected with the transverse girder 4 through bolts 6, please refer to fig. 3. Through bolted connection, also can avoid FDS nail to connect, because FDS's locking force for the big face contact of lower surface at liquid cooling board and crossbeam longeron interface.
When the liquid cooling plate 1 is connected with the longitudinal beam 4 through the bolts 6, the heat insulation sheet 7 may be disposed between the liquid cooling plate and the longitudinal beam 4, please refer to fig. 1.
In an embodiment, in order to further reduce the contact area between the liquid cooling plate 1 and the bottom protection plate 2, the bottom protection plate 2 is provided with an upward protrusion 21, please refer to fig. 1. The lower surface of liquid cold drawing 1 links to each other with end backplate 2 through first connecting portion specifically does: the lower surface of the liquid-cooled plate is connected to the boss 21 through a first connecting portion.
In one embodiment, the thermal insulating sheet may be a thermal insulating epoxy sheet.
In one embodiment, the low-temperature heat preservation structure of the power battery further comprises: the structural adhesive assembly is arranged on the liquid cooling plate. The structural adhesive assembly comprises: a first structural adhesive portion 8 and a second structural adhesive portion 9, please refer to fig. 4. The first structural adhesive part 8 is positioned in the area of the liquid cooling plate 1 opposite to the battery core in the power battery pack; the second structural adhesive part 9 is located at a position where the liquid cooling plate is in contact with the transverse beam and the longitudinal beam of the power battery pack. The thermal conductivity of the second structural adhesive part is less than that of the first structural adhesive part. The heat conductivity coefficient of the first structure glue part is high, so that the heat emitted by the battery cell can be guided out to the liquid cooling plate when the power battery works normally, and then the heat is guided out through the liquid cooling plate. The heat conductivity coefficient of the second structural adhesive part is lower and can be 0.1-0.2, so that the heat conduction to the transverse and longitudinal beams when the power battery does not work can be reduced, and the heat loss is further reduced.
In the above embodiment, the place where the second structural adhesive part is located the liquid cooling board and contacts with the crossbar of the power battery pack further includes: when the place that the horizontal longeron of liquid cold plate and power battery package contacted is provided with the gluey portion of first structure, the gluey portion of second structure still is located the place that the horizontal longeron of gluey portion of first structure and power battery package contacted, can play the effect that further reduces heat transfer and keep apart, avoids the heat to scatter and disappear.
In one embodiment, the low-temperature thermal insulation structure of the power battery further comprises: a low thermal conductive adhesive part 10; the low thermal conductive adhesive portion is disposed between the longitudinal and transverse beams of the power battery pack and the frame 11, please refer to fig. 5. The arrangement of the low thermal conductive adhesive part 10 can further avoid heat conduction.
In one embodiment, in order to enhance the connection strength between the power battery and the frame, the cross member and the frame may be connected by bolts 12 on the basis of the low thermal conductive adhesive portion 10, please refer to fig. 5.
In an embodiment, the low thermal conductive adhesive portion may also be replaced by a heat insulating sheet, and the heat insulating sheet does not have a connecting function, so that the cross beam and the frame need to be connected by bolts at this time.
In the description herein, references to the terms "an embodiment," "an example," "a specific implementation," "an example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the example 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 do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (11)
1. The utility model provides a power battery low temperature insulation construction which characterized in that includes: a liquid cooling plate, a first connection portion;
the liquid cooling plate is arranged at the bottom of the power battery pack;
the lower surface of the liquid cooling plate is connected with the bottom guard plate through the first connecting part;
the first connection portion includes: a heat insulating sheet.
2. The low-temperature heat preservation structure of power battery according to claim 1, characterized by further comprising: and the upper surface of the liquid cooling plate is connected with the transverse beam and the longitudinal beam of the power battery pack through the second connecting part.
3. The low-temperature heat preservation structure for power batteries according to claim 2, characterized in that the second connection part comprises: welding a gasket;
and the liquid cooling plate and the transverse longitudinal beam are penetratingly welded through the welding gaskets.
4. The low-temperature heat preservation structure for the power battery as claimed in claim 3, wherein the welding gasket is an aluminum sheet.
5. The low-temperature heat preservation structure for the power battery of claim 3, wherein the size of the welding gasket is any value between 1mm and 2 mm.
6. The low-temperature heat preservation structure for the power battery as claimed in claim 5, wherein the number of the welding pads comprises a plurality of welding pads, and different welding pads are distributed at different positions of the liquid cooling plate.
7. The low-temperature heat preservation structure for power batteries according to claim 2, characterized in that the second connection part comprises: a bolt;
the liquid cooling plate is connected with the transverse longitudinal beam through the bolt.
8. The low-temperature heat preservation structure of the power battery according to claim 1, characterized in that the bottom guard plate is provided with an upward bulge;
the lower surface of liquid cooling board passes through first connecting portion links to each other with end backplate specifically does: the lower surface of the liquid cooling plate is connected with the protrusion through the first connecting portion.
9. The low-temperature heat preservation structure for the power battery according to any one of claims 1 to 8, wherein the heat insulation sheet is a heat insulation epoxy resin sheet.
10. The low-temperature heat preservation structure of the power battery according to any one of claims 1 to 8, further comprising: the structural adhesive assembly is arranged on the liquid cooling plate;
the structural adhesive assembly comprises: the first structural adhesive part and the second structural adhesive part;
the first structural adhesive part is positioned in the area of the liquid cooling plate opposite to the battery core in the power battery pack;
the second structural adhesive part is positioned at the position of the liquid cooling plate, which is in contact with the transverse beam and the longitudinal beam of the power battery pack;
the heat conductivity coefficient of the second structural adhesive part is smaller than that of the first structural adhesive part.
11. The low-temperature heat preservation structure of the power battery according to any one of claims 1 to 8, further comprising: a low thermal conductive adhesive portion;
the low heat-conducting glue portion is arranged between the transverse beam and the longitudinal beam of the power battery pack and the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221859317.7U CN218827435U (en) | 2022-07-19 | 2022-07-19 | Low-temperature heat-insulation structure of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221859317.7U CN218827435U (en) | 2022-07-19 | 2022-07-19 | Low-temperature heat-insulation structure of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218827435U true CN218827435U (en) | 2023-04-07 |
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|---|---|---|---|
| CN202221859317.7U Active CN218827435U (en) | 2022-07-19 | 2022-07-19 | Low-temperature heat-insulation structure of power battery |
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| CN (1) | CN218827435U (en) |
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- 2022-07-19 CN CN202221859317.7U patent/CN218827435U/en active Active
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