CN219658807U - Power battery module structure - Google Patents
Power battery module structure Download PDFInfo
- Publication number
- CN219658807U CN219658807U CN202223208891.9U CN202223208891U CN219658807U CN 219658807 U CN219658807 U CN 219658807U CN 202223208891 U CN202223208891 U CN 202223208891U CN 219658807 U CN219658807 U CN 219658807U
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- Prior art keywords
- plate
- battery module
- power battery
- module structure
- end plate
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- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- 229920000742 Cotton Polymers 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000741 silica gel Substances 0.000 abstract description 4
- 229910002027 silica gel Inorganic materials 0.000 abstract description 4
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000010261 cell growth Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a power battery module structure, which comprises: a side plate extending along a first direction and an end plate extending along a second direction, wherein the side plate and the end plate are surrounded to form a frame structure; the battery cells are arranged in the frame-type structure, stacked along a first direction to form a battery cell array, and stacked along a second direction to form a battery cell group; and a heating film is arranged between two adjacent cell columns and/or between the cell group and the side plate. According to the utility model, the silica gel heating film is arranged, and the heating film is used for heating the battery cells in the module, so that the problem of poor discharge efficiency of the lithium iron phosphate battery cells at low temperature can be solved, and the endurance mileage of the carried whole vehicle can be improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a power battery module structure.
Background
With the development of new energy industry in China, the energy density of the battery pack is gradually improved, and CTP is generated as a technical application for improving the energy density of the battery pack. CTP technology, also known as Cell To Pack, is also known as the moduleless technology, and two different technological routes exist. Firstly, thoroughly canceling the scheme of the module; and secondly, integrating the small modules into a large module. The CTP technology simplifies the manufacturing process of battery-module-whole package into battery-whole package, omits the intermediate process of assembling a plurality of modules, and can greatly reduce the whole package weight, thereby improving the energy density.
The most suitable working temperature of the lithium iron phosphate battery is 10-25 ℃, the service life of the battery is reduced due to the fact that the working temperature is too high or too low, the charging and discharging efficiency of the battery is affected, and in winter, particularly in north, the environment temperature can reach below 0 ℃, so that in order to ensure the normal operation of the battery, a heating device is required to be arranged in a battery module to ensure the working temperature of the battery.
In addition, prior art solutions typically make modules from cells, with a pack consisting of multiple modules. The module parts comprise end side plates, copper bars, spacers and the like, a plurality of modules are provided with more structural members, and pack energy density is low, so that the carried whole vehicle has low endurance mileage;
and further, current small module mode compresses tightly electric core and end plate with packing area usually, but the electric core expansion force that this design was selected for use is great, and the time is longer can produce the lax after packing area is cuffling. After the electric cores are loosened, the electric cores can be loosened only by the adhesive force of the double-sided adhesive tape, and potential safety hazards exist. And the installation clearance of 3-5mm exists between the small modules, so that the installation space requirements are more severe compared with those of the large modules.
Disclosure of Invention
In view of the above, the present utility model is directed to a power battery module structure, which is mainly used for solving the problem of ensuring the working temperature of the battery at low temperature and further solving the problem of low energy density.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a power battery module structure, comprising:
a side plate extending along a first direction and an end plate extending along a second direction, the side plate and the end plate being surrounded to form a frame structure;
the battery cells are arranged in the frame-type structure, the battery cells are stacked along a first direction to form a battery cell array, and the battery cell arrays are stacked along a second direction to form a battery cell group;
and the heating film is arranged between two adjacent cell columns and/or between the cell group and the side plate.
The power battery module structure is characterized in that heat insulation cotton is arranged between the electric core group and the end plate.
The power battery module structure is characterized in that a PC spacer is arranged at the heating film between the electric core group and the side plate.
In the power battery module structure, the end plate is provided with a positioning pin for pre-fixing the side plate;
and the end plate is riveted with the side plate.
The power battery module structure described above, wherein further includes: the upper cover plate is fixedly connected with the upper end of the frame-type structure, two ends of the upper cover plate are respectively bent downwards to form an upper cover plate fixing part, and the upper cover plate fixing part is fixedly connected with the upper end of the end plate.
The power battery module structure described above, wherein further includes: the box body at least comprises a box body bottom plate and box body side walls which are arranged around the outer edge of the box body bottom plate;
structural adhesive is coated on the bottom plate of the box body, and the end plate, the side plate, the battery cell group and the upper cover plate are all arranged in the box body.
The power battery module structure described above, wherein further includes: and the pull rods penetrate through the end plates and are fixedly connected with the box body.
In the power battery module structure, the lower ends of the battery cell groups protrude out of the end plate and the side plate to form protruding parts;
further comprises: and the epoxy resin strips are arranged on the side surfaces of the protruding parts.
The power battery module structure is characterized in that a spacer is arranged between the electric cores, and the spacer is bonded with and insulates two adjacent electric cores.
The power battery module structure comprises an end plate and heat insulation cotton, wherein the end plate and the heat insulation cotton are provided with avoidance grooves for the wire harness or the terminal of the heating film to pass through.
The utility model adopts the technology, so that compared with the prior art, the utility model has the positive effects that:
(1) According to the utility model, the silica gel heating film is arranged, and the heating film is used for heating the battery cells in the module, so that the problem of poor discharge efficiency of the lithium iron phosphate battery cells at low temperature can be solved, and the endurance mileage of the carried whole vehicle can be improved.
(2) The utility model changes the existing design into a CTP large module, reduces module structural members, improves energy density and grouping efficiency, reduces design cost, simultaneously reduces the whole package quality and improves the energy density of the battery pack;
(3) Compared with the traditional design that a plurality of modules form a battery PACK, the CTP large module is only provided with one module, so that the PACK efficiency is improved, and the working time for putting the modules into a box is reduced. Meanwhile, the requirement on the installation space can be reduced by adopting a large module;
(4) According to the utility model, a design mode of tightening the battery cells by the packing belt is not adopted any more, the traditional packing belt design is replaced by the end side plate riveting scheme, the battery cell expansion resistance capability of the module is stronger (the battery cells expand after the cycle times are more), the rigidity of the module is also improved, the loose battery cells caused by the loosening of the packing belt can be avoided, and the after-sale problem caused by aging failure of the packing belt can be effectively avoided.
Drawings
Fig. 1 is an exploded view of a power battery module structure of the present utility model;
fig. 2 is an assembly schematic view of the structure of the power battery module of the present utility model;
in the accompanying drawings: 1. a side plate; 2. an end plate; 21. an avoidance groove; 3. a battery cell; 4. heating the film; 5. thermal insulation cotton; 51. an avoidance groove; 6.PC spacer; 7. an upper cover plate; 71. an upper cover plate fixing part; 8. a case; 81. a bottom plate of the box body; 82. a side wall of the box body; 9. a pull rod; 10. an epoxy resin strip.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "transverse," "vertical," and the like are used for convenience in describing the present utility model based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the device or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1 to 2, a power battery module structure of a preferred embodiment is shown, which includes: a side plate 1 extending along a first direction, an end plate 2 extending along a second direction, a plurality of battery cells 3 arranged in a frame structure, and a heating film 4. Wherein, the side plate 1 and the end plate 2 are surrounded to form a frame structure, a plurality of battery cells 3 are stacked along a first direction to form a battery cell array, a plurality of battery cell arrays are stacked along a second direction to form a battery cell group, and a heating film 4 is arranged between two adjacent battery cell arrays and/or between the battery cell group and the side plate 1.
Specifically, the first direction in this embodiment refers to the lower left to upper right direction in fig. 1, and the second direction refers to the upper left to lower right direction in fig. 1.
Preferably, the end plate 2 is made of die-cast aluminum alloy, and wire harness buckle mounting holes are cast on the end plate and used for fixing the low-voltage wire harness and the total positive and negative copper bars.
Preferably, the side plates are made of carbon steel plate metal plates by punching, and three reinforcing ribs are punched on the side plates and used for enhancing the overall rigidity and torsion resistance, and are provided with round lightening holes.
Preferably, the heating film 4 is a silica gel heating film, and the silica gel heating film is used for heating the battery cells in the module.
Further, as a preferred embodiment, a heat insulation cotton 5 is arranged between the battery cell group and the end plate 2, so as to prevent the aluminum alloy end plate from conducting heat and taking away the heat of the battery cell rapidly, and thus the discharge is uneven.
Further, as a preferred embodiment, a PC spacer 6 is provided at the heating film 4 between the cell group and the side plate 1. The PC spacer 6 provides insulation protection and ensures that the heating film is not pierced by the side plate burrs.
Further, as a preferred embodiment, the end plate 2 is provided with a positioning pin for pre-fixing the side plate.
Further, as a preferred embodiment, the end plate 2 is riveted with the side plate 1.
Specifically, the side plate 1 is pre-fixed by a positioning pin on the end plate 2, and then riveted with a pneumatic riveter and a stainless steel rivet (riveting the side plate 1 and the end plate 2.
Further, as a preferred embodiment, the power battery module structure further includes: and the upper cover plate 7 is fixedly connected with the upper end of the frame-type structure, two ends of the upper cover plate 7 are respectively bent downwards to form an upper cover plate fixing part 71, and the upper cover plate fixing part 71 is fixedly connected with the upper end of the end plate 2.
Preferably, the upper cover plate 7 is formed by cutting and bending a PC sheet, and compared with the traditional plastic upper cover plate, the cost can be reduced by about 40%.
Further, as a preferred embodiment, the power battery module structure further includes: the box body 8, the box body 8 at least comprises a box body bottom plate 81 and a box body side wall 82 which is arranged around the outer edge of the box body bottom plate 81.
Further, as a preferred embodiment, the bottom plate 81 of the case is coated with a structural adhesive, and the end plate 2, the side plate 1, the battery cell group and the upper cover plate 7 are all disposed in the case 8.
Further, as a preferred embodiment, the power battery module structure further includes: the pull rods 9, and a plurality of pull rods 9 penetrate through the end plate 2 and are fixedly connected with the box body 8.
Further, as a preferred embodiment, the lower ends of the battery cell groups protrude from the end plate 2 and the side plate 1 to form protruding parts. Since the cell groups are disposed to protrude from the end plate 2 and the side plate 1, the vertical dimensions of the end plate 2 and the side plate 1 can be reduced, thereby reducing the overall weight.
Further, as a preferred embodiment, the power battery module structure further includes: and the epoxy resin strips 10, wherein the epoxy resin strips 10 are arranged on the side surfaces of the protruding parts of the end plate 2 and the side plate 1 at the lower ends of the battery cell groups. The epoxy strips 10 provide insulation between the cell stack and the frame structure.
Preferably, the epoxy strips 10 are annularly arranged with the outer circumference of the protrusions of the cell stack.
Further, as a preferred embodiment, spacers are provided between the cells 3, and the spacers bond and insulate two adjacent cells 3. Specifically, the spacer adopts a spacer with double-sided back glue.
Further, as a preferred embodiment, the end plate 2 and the heat insulation cotton 5 are respectively provided with a relief groove 21 and a relief groove 51 for passing the wire harness or the terminal of the heating film 4.
Specifically, when the power battery module structure of this embodiment is manufactured, after the electric cores 3 are stacked into electric core rows, the heating films 4 are installed between two adjacent electric core rows and at two sides of the whole electric core group, insulation and bonding are performed between the electric cores by using the spacers of double-sided back glue, a piece of heat insulation cotton 5 is bonded between the electric cores 3 and the end plate 2, and then the electric cylinders are used for extruding the module (i.e. the electric core group) to the designed box-in size in the length-width direction.
Further, in manufacturing the power battery module structure of this embodiment, the PC spacer 6 of double-sided adhesive tape is bonded to the side plate 1, the side plate 1 is pre-fixed by the positioning pin on the end plate 2, and then the side plate 1 and the end plate 2 are riveted by the pneumatic rivet gun and the stainless steel rivet, so as to complete the manufacturing of the frame structure outside the module.
Further, in manufacturing the power battery module structure of this embodiment, after the frame structure outside the module is fixed, the upper cover plate 7 is mounted above the module and laser welding is performed, and finally, the upper cover plate 7 is fixed on the end plate 2 by using a hexagon head bolt, so that the manufacturing of the whole module is completed.
Further, in manufacturing the power battery module structure of this embodiment, the bottom plate 81 of the case 8 is coated with structural adhesive on the surface in contact with the module, and after the large module is put into the case, it is fixed by 6 tie rods 9 of M8.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.
Claims (10)
1. A power battery module structure, comprising:
a side plate extending along a first direction and an end plate extending along a second direction, the side plate and the end plate being surrounded to form a frame structure;
the battery cells are arranged in the frame-type structure, the battery cells are stacked along a first direction to form a battery cell array, and the battery cell arrays are stacked along a second direction to form a battery cell group;
and the heating film is arranged between two adjacent cell columns and/or between the cell group and the side plate.
2. The power battery module structure according to claim 1, wherein heat insulation cotton is arranged between the electric core group and the end plate.
3. The power battery module structure according to claim 1, wherein a PC spacer is provided at a heating film between the cell group and the side plate.
4. The power battery module structure according to claim 1, wherein the end plate is provided with a positioning pin for pre-fixing the side plate;
and the end plate is riveted with the side plate.
5. The power battery module structure according to claim 1, further comprising: the upper cover plate is fixedly connected with the upper end of the frame-type structure, two ends of the upper cover plate are respectively bent downwards to form an upper cover plate fixing part, and the upper cover plate fixing part is fixedly connected with the upper end of the end plate.
6. The power battery module structure according to claim 5, further comprising: the box body at least comprises a box body bottom plate and box body side walls which are arranged around the outer edge of the box body bottom plate;
structural adhesive is coated on the bottom plate of the box body, and the end plate, the side plate, the battery cell group and the upper cover plate are all arranged in the box body.
7. The power battery module structure according to claim 6, further comprising: and the pull rods penetrate through the end plates and are fixedly connected with the box body.
8. The power battery module structure according to claim 1, wherein lower ends of the cell groups protrude from the end plates and the side plates to form protruding portions;
further comprises: and the epoxy resin strips are arranged on the side surfaces of the protruding parts.
9. The power battery module structure of claim 1, wherein spacers are disposed between the cells, and wherein the spacers bond and insulate two adjacent cells.
10. The power battery module structure according to claim 2, wherein the end plate and the heat insulation cotton are provided with avoiding grooves for passing through the wire harness or the terminal of the heating film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223208891.9U CN219658807U (en) | 2022-11-30 | 2022-11-30 | Power battery module structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223208891.9U CN219658807U (en) | 2022-11-30 | 2022-11-30 | Power battery module structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219658807U true CN219658807U (en) | 2023-09-08 |
Family
ID=87857590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223208891.9U Active CN219658807U (en) | 2022-11-30 | 2022-11-30 | Power battery module structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219658807U (en) |
-
2022
- 2022-11-30 CN CN202223208891.9U patent/CN219658807U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |