CN109686894A - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN109686894A CN109686894A CN201910163147.5A CN201910163147A CN109686894A CN 109686894 A CN109686894 A CN 109686894A CN 201910163147 A CN201910163147 A CN 201910163147A CN 109686894 A CN109686894 A CN 109686894A
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- China
- Prior art keywords
- crossbeam
- battery pack
- isolation board
- stringer
- battery
- Prior art date
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of battery packs, comprising: battery modules；Battery pack cabinet, including multiple crossbeams and multiple stringers, crossbeam and stringer limit multiple mould group accommodating spaces for accommodating battery modules, and the one side of each mould group accommodating space is provided with an isolation board；Liquid cooled module is set to the other side of isolation board, liquid cooled module and battery modules by isolation board and carries out heat transfer.Crossbeam and stringer all have overlap joint rib, overlap and thermal insulation board is arranged above rib, isolation board is placed on thermal insulation board, and is also equipped with thermal insulation board between the lower section and lower cover of the crossbeam at both ends.There is between isolation board and the medial surface of corresponding crossbeam the first gap corresponding to each mould group accommodating space, and there is between isolation board and the medial surface of corresponding stringer the second gap corresponding to each mould group accommodating space.By using the solution of the present invention, a kind of battery pack with thermal-insulating body structure is provided, reduces influence of the environment to battery, and realize battery pack even temperature effect.
Description
Technical field
The present invention relates to battery pack technical fields more particularly to a kind of realize to keep the temperature the battery pack cabinet and electricity of equal temperature function
Chi Bao.
Background technique
The temperature difference of lithium-ion-power cell is larger, and can directly cause some defects: (1) cell decay is inconsistent, or even draws
Cell degradation is played to accelerate；(2) battery status estimation error is larger, and even resulting in vehicle can not travel；(3) it is cold to reduce battery pack
But/heating efficiency extends pre-cooling/preheating time, increases energy consumption, and even resulting in vehicle can not travel, and can generate under serious conditions
The risks such as Fire explosion.
Battery temperature is too low to reduce battery active volume and battery available power.When vehicle towards compared with cryogenic region sale and
In use, in order to delay influence of the low temperature to battery active volume and battery available power, battery pack needs to configure heat preservation knot
Structure.The higher aging that can accelerate battery of battery temperature.Under the environment of summer sweltering heat, for being configured with the battery pack of liquid cooling system
Vehicle, after electricity under vehicle, environment can heat battery, and battery temperature is caused to be even higher than 40 DEG C.Therefore, for power battery
For, either temperature is excessively high, temperature is too low or excessive temperature differentials, can all generate very to the power battery even performance of vehicle
Big adverse effect.
In the prior art, it in order to realize the separating dry space from moist space of battery modules and liquid cooling system in battery pack, provides a kind of dry
Hygroscopic water is from battery pack.The separating dry space from moist space battery pack of the prior art is as shown in Figure 1.Battery pack from top to bottom successively include upper cover 101,
Battery modules 103, the first heat-conducting layer 104, separating dry space from moist space isolation board 105, the second heat-conducting layer 106, liquid cooling plate 107 and lower cover 108,
The side of battery pack is provided with side plate 102.First connected domain is constituted by upper cover 101, side plate 102 and isolation board 105, removes cooling tube
Battery pack components other than road and cooling line accessory are located in the first connected domain, and electricity is mainly accommodated in the first connected domain
Chi Mo group, BMS (Battery Management System, battery management system), high-low pressure harness etc..Lower cover 108, isolation
Plate 105 and side plate 102 constitute the second connected domain, and cooling line and cooling line accessory are located in the second connected domain, and second
Connected domain mainly accommodates battery cooling tube, coldplate and attached supporter, thermally conductive sheet etc..Liquid caused by anti-cold liquid leakage and condensation
Body can not be sprayed from the second connected domain or be flow in the first connected domain.
However, this separating dry space from moist space battery pack but haves the defects that be easy by ambient temperature effect.Specifically, due to electricity
The separating dry space from moist space isolation board 105 and battery pack lower cover of Chi Bao is directly connected to, and is aluminium profile structure part, and external environment can pass through these
The heat-transfer path that aluminium profile structure part is constituted carries out heat exchange, if design is not thermally isolated, separating dry space from moist space battery pack with mould group
It is easier to be influenced by environment than the non-separating dry space from moist space liquid cooling battery pack using identical material, the temperature difference of such battery pack can be more
Greatly.
Summary of the invention
For the problems of the prior art, the purpose of the present invention is to provide a kind of with the electricity with thermal-insulating body structure
Chi Bao reduces influence of the environment to battery, and realizes even temperature effect.
The embodiment of the present invention provides a kind of battery pack, comprising: battery modules；Battery pack cabinet, the battery pack cabinet packet
Multiple crossbeams and multiple stringers are included, the multiple crossbeam and multiple stringers limit multiple mould group accommodating spaces, the battery modules
It is placed in the mould group accommodating space, the one side of each mould group accommodating space is provided with an isolation board, each described
There is between isolation board and the medial surface of corresponding crossbeam the first gap, and each mould corresponding to mould group accommodating space
Corresponding to group accommodating space there is the second gap between isolation board and the medial surface of corresponding stringer；Liquid cooled module, setting
Liquid cooled module and the battery modules described in side of the isolation board away from the battery modules by the isolation board into
Row heat transfer.
Optionally, heat-barrier material is filled in first gap and second gap.
Optionally, the medial surface of the stringer is provided with stringer overlap joint rib, and the stringer overlap joint rib includes clinch, described
Overlapping part is provided in the lower section of the isolation board, and between the upper surface of the clinch and the lower surface of the isolation board
First thermal insulation board.
Optionally, the stringer overlap joint rib further includes the extension between the clinch and the stringer, described
Clinch is bent downward relative to the extension, and the extension is concordant with the isolation board to be arranged, and the extension with
There is second gap between the isolation board.
Optionally, the medial surface of the crossbeam is provided with crossbeam overlap joint rib, and the crossbeam overlap joint rib is located at the isolation board
Lower section.
Optionally, the crossbeam includes the end crossbeam positioned at the both ends of the battery pack cabinet, the end crossbeam
The second thermal insulation board is provided between crossbeam overlap joint rib and the isolation board.
Optionally, the crossbeam further includes the middle beam between the end crossbeam, and the end crossbeam institute is right
Spacing H1 between the lower end surface of the isolation board and the end crossbeam answered be less than isolation board corresponding to the middle beam with
Spacing H2 between the lower end surface of the middle beam.
Optionally, further include the lower cover being set to below the liquid cooled module, the lower end surface of the end crossbeam with it is described
Third thermal insulation board is provided between lower cover.
Optionally, the end crossbeam of one end of the battery pack cabinet includes first crossbeam and second cross beam, and described first
Crossbeam, the second cross beam and the stringer limit an accessory accommodating space, and the side of the accessory accommodating space, which is provided with, matches
Part isolation board, the edge of the accessory isolation board medial surface with the medial surface of the first crossbeam, the second cross beam respectively
It is bonded with the medial surface of the stringer.
Optionally, the liquid cooled module includes and the one-to-one liquid cooling plate unit of the battery modules, the liquid cooling group
Lower cover is provided with below part, gap rear support of the crossbeam across the liquid cooling plate unit is on the lower lid；Institute
It states and is provided with upper cover above battery pack cabinet, the upper cover covers the mould group accommodating space simultaneously and accessory accommodating is empty
Between.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Battery pack provided by the present invention has the advantage that
The present invention provides a kind of battery packs with thermal-insulating body structure, pass through the stringer of isolation board and battery pack cabinet
Isolation between crossbeam realizes that isolation heat is transmitted to crossbeam and stringer from the circumferential surface of isolation board, and completely cuts off heat from cross
The transmitting of beam and stringer to isolation board slows down environment to the heating effect of battery to reduce influence of the environment to battery, and
It realizes battery pack even temperature effect, reduces cell degradation speed, improve battery active volume and service life；Overall structure is simple,
It is practical.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon.
Fig. 1 is a kind of structural schematic diagram of battery pack in the prior art；
Fig. 2 is the explosive view of the battery pack of one embodiment of the invention；
Fig. 3 is the structural schematic diagram of the battery pack cabinet of one embodiment of the invention；
Fig. 4 is enlarged drawing at A in Fig. 3；
Fig. 5 is the stringer of one embodiment of the invention and the schematic diagram of isolation board cooperation；
Fig. 6 is the enlarged drawing of stringer and isolation board matching part in Fig. 5；
Fig. 7 is the stringer of one embodiment of the invention and the schematic diagram that liquid cooling plate and lower cover cooperate；
Fig. 8 is enlarged drawing at B in Fig. 7；
Fig. 9 is the 6th crossbeam of one embodiment of the invention and the schematic diagram of isolation board cooperation；
Figure 10 is the third crossbeam of one embodiment of the invention and the schematic diagram of isolation board cooperation；
Figure 11 is the schematic diagram of first crossbeam, second cross beam and the isolation board cooperation of one embodiment of the invention；
Figure 12 is the 6th crossbeam of one embodiment of the invention and the schematic diagram that liquid cooling plate and lower cover cooperate；
Figure 13 is the third crossbeam of one embodiment of the invention and the schematic diagram that liquid cooling plate and lower cover cooperate；
Figure 14 is the first crossbeam, second cross beam and liquid cooling plate of one embodiment of the invention and the schematic diagram of lower cover cooperation；
Figure 15 is the temperature lowering curve figure tested battery pack in the prior art；
Figure 16 is the temperature lowering curve figure tested battery pack of the invention.
Appended drawing reference:
The prior art
101 upper cover, 105 isolation board
102 side plate, 106 second heat-conducting layer
103 battery modules, 107 liquid cooling plate
104 first heat-conducting layer, 108 lower cover
The present invention
1 upper cover, 422 second stringer
2 battery modules, 43 isolation board
3 heat-conducting pad, 44 stringer overlaps rib
4 battery pack cabinet, 441 extension
41 crossbeam, 442 clinch
411 first crossbeam, 45 first thermal insulation board
412 second cross beam, 46 crossbeam overlaps rib
413 third crossbeam, 47 second thermal insulation board
414 the 4th crossbeam, 48 mould group accommodating space
415 the 5th crossbeam, 49 accessory accommodating space
416 the 6th crossbeam, 5 liquid cooled module
42 stringer, 6 lower cover
421 first stringer, 7 third thermal insulation board
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to example set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, knot
Structure or characteristic can be incorporated in any suitable manner in one or more embodiments.
In addition, attached drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.Identical attached drawing mark in figure
Note indicates same or similar part, thus will omit repetition thereof.
As shown in Fig. 2, in order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of battery pack, including battery pack
Mould group 2, battery pack cabinet 4 and liquid cooled module 5.Wherein, the battery pack cabinet 4 includes multiple crossbeams 41 and multiple stringers 42,
The multiple crossbeam 41 and multiple stringers 42 limit multiple mould group accommodating spaces 48, and the battery modules 2 are placed in the mould group
In accommodating space 48, the downside of each mould group accommodating space 48 is provided with an isolation board 43.The liquid cooled module 5 is arranged
In the lower section of the battery pack cabinet 4, and the liquid cooled module 5 and the battery modules 2 carry out heat by the isolation board 43
Conduction.
In this embodiment, the top of the mould group accommodating space 48 is additionally provided with upper cover 1.Battery modules 2 are located at upper cover
1, in the mould group accommodating space 48 that crossbeam 41, stringer 42 and isolation board 43 limit, and liquid cooled module 5 then passes through with battery modules 2
Isolation board 43 is spaced apart, and is avoided liquid injection caused by anti-icing fluid leakage and condensation in liquid cooled module 5 or is flow to mould group
In accommodating space 48.Battery modules 2 in the battery pack cabinet 4 carry out heat transfer by isolation board 43 and liquid cooled module 5.?
In the embodiment, heat-conducting pad 3, the battery modules 2 are additionally provided between the battery modules 2 and corresponding isolation board 43
It passes sequentially through the heat-conducting pad 2 and the isolation board 43 and the liquid cooled module 5 carries out heat transfer.
As shown in Fig. 2, in this embodiment, cooling component 5 includes and the one-to-one multiple liquid coolings of the battery modules 2
Plate unit there is certain interval to pass through for crossbeam 41 between two neighboring liquid cooling plate unit, the lower section setting of the liquid cooled module
There is a lower cover 6, gap rear support of the crossbeam 41 across the liquid cooling plate unit is on the lower cover 6, thus and stringer
42 support entire battery pack cabinet 4 and battery modules 2 together.
As shown in figure 3, in this embodiment, battery pack cabinet 4 includes six crossbeams 411~416 and two 421 Hes of stringer
422.The quantity of however, the present invention is not limited thereto, crossbeam 41 and stringer 42, which can according to need, to be select and set.In the implementation
In example, first crossbeam 411, second cross beam 412, the first stringer 421 and the second stringer 422 define accessory accommodating space 49, match
Placing battery module fittings in part accommodating space 49, battery modules accessory refers in battery pack other than battery modules herein
Other assemblies, such as battery management system (BMS), high pressure electric appliance box.Third crossbeam 413, the 4th crossbeam the 414, the 5th are horizontal
Beam 415, the 6th crossbeam 416, the first stringer 421 and the second stringer 422 define four mould group accommodating spaces 48.The accommodating of mould group is empty
Between 48 particular number can be selected according to the quantity of the battery modules 2 of practical application.Described in the covering simultaneously of upper cover 1
Accessory accommodating space 49 and mould group accommodating space 48, form closed battery pack receiving cavity, and upper cover 1 can also be according to each appearance
Setting subsection setup between emptying.
As shown in figure 4, each mould group is held in order to avoid the heat transfer between isolation board 43 and crossbeam 41 and stringer 42
Isolation board 43 corresponding to 48 between emptying and limit the mould group accommodating space 48 crossbeam 41 medial surface between have first between
Gap G1, and isolation board 43 corresponding to each mould group accommodating space 48 and the stringer 42 for limiting the mould group accommodating space 48
There is the second clearance G 2 between medial surface, so that heat be avoided to transmit from isolation board 43 to crossbeam 41 and stringer 42, improve battery
Whole uniform temperature is wrapped, battery modules 2 can also be transferred to by isolation board 43 to avoid the heat of crossbeam 41 and stringer 42, reduced
The influence of environment temperature.The size of first clearance G 1 can be identical or different with the size of the second clearance G 2.In order to enable knot
Structure simply and structure uniformly, in one embodiment, the first clearance G 1 is identical with the value of the second clearance G 2, and can be
It is selected within the scope of 0.5mm~1.5mm, such as G1=G2 ≈ 1mm.It can be sky in first gap and second gap
Gas, can also be filled with heat-barrier material, such as rubber, sponge etc..
In this embodiment, the downside of the accessory accommodating space 49 is also equipped with isolation board 43, the isolation board 43
Edge can respectively with the medial surface of the first crossbeam 411, the second cross beam 412 medial surface and the stringer 42 in
Side fitting.In other embodiments, the edge of the isolation board 43 can respectively with the medial surface of the first crossbeam 411,
An at least side clearance is provided between the medial surface of the second cross beam 412 and the medial surface of the stringer 42.
As shown in Figure 5 and Figure 6, the medial surface of the stringer 42 is provided with stringer overlap joint rib 44, and the stringer overlaps rib 44
Including clinch 442, the clinch 442 is located at the lower section of the isolation board 43, and the upper surface of the clinch 442 and institute
It states and is provided with the first thermal insulation board 45 between the lower surface of isolation board 43.The thermal coefficient of first thermal insulation board 45 is preferably smaller than 1.5W/
MK, for transmitting of the trap heat between the end face and stringer 42 of isolation board 43.In this embodiment, the stringer overlaps rib
44 further include the extension 441 between the clinch 442 and the stringer 42, and the clinch 442 is relative to described
Extension 441 is bent downward, the extension 441 it is concordant with the isolation board 43 setting, and the extension 441 and it is described every
From having second gap between plate 43, with the heat transfer completely cut off between isolation board 43 and stringer 42.
The height of first thermal insulation board 45 is H, and height H must satisfy the lower section that liquid cooled module 5 is installed to battery pack cabinet 4
Afterwards, it will not be interfered between stringer overlap joint rib 44 and liquid cooled module 5.As shown in Figure 7 and Figure 8, liquid cooled module 5 and stringer overlap
There are gap between rib 44, guarantee not interfere between liquid cooled module 5 and stringer overlap joint rib 44.The preferred tool of first thermal insulation board 45
There is the heat-barrier material of certain degree of hardness, such as with the plastics of flame retardant property, the pressure that the deformation of 3 material of heat-conducting pad generates can be born
Power, without apparent compression occurs, guarantee between heat-conducting pad 3 and battery modules 2 and heat-conducting pad 3 and isolation board 43 compared with
Good thermo-contact.First thermal insulation board 45 can overlap rib pre- 44 with stringer and be assembled into component, then assemble again with isolation board 43；?
First thermal insulation board 45 can be first assembled into isolation board 43 to component, then assembled with longitudinal lap joint rib 44.
As shown in Fig. 9~11, the medial surface of the crossbeam 41 is provided with crossbeam overlap joint rib 46, and the crossbeam overlaps 46, rib
In the lower section of the isolation board 43.In this embodiment, the crossbeam includes positioned at the end at the both ends of the battery pack cabinet 4
Crossbeam and the middle beam between the end crossbeam.In this embodiment, end crossbeam includes being located at battery pack cabinet 4
One end and limit the first crossbeam 411 and second cross beam 412 and positioned at the another of battery pack cabinet 4 of accessory accommodating space 49
6th crossbeam 416 at end, middle beam includes third crossbeam 413, the 4th crossbeam 414 and the 5th crossbeam 415.
As shown in figures 9 and 11, the crossbeam of the first crossbeam 411, second cross beam 412 and the 6th crossbeam 416 overlaps rib
The second thermal insulation board 47 is provided between 46 and the isolation board 43.And it is as shown in Figure 10, the middle part by taking third crossbeam 413 as an example is horizontal
The crossbeam overlap joint rib 46 of beam is then directly contacted with the end face of isolation board 43.According to heat transfer theory, it is located at second cross beam 412 and third
The heat of battery modules 4 between crossbeam 413 and the battery modules 4 between the 5th crossbeam 415 and the 6th crossbeam 416 and environment
Exchange velocity is much larger than the battery modules 4 of other positions and the rate of heat exchange of environment.This design can balance different location
The speed of heat exchange between battery modules 4 and environment realizes mould group even temperature effect.The material of second thermal insulation board 47 can choose with
The identical material of first thermal insulation board 45, the second thermal insulation board 47 can also be using the forms of segmentation.The height of second thermal insulation board 47
It is preferred that it is identical as the height of the first thermal insulation board 45, to realize that structure is unified and structure is simple.
The structure that 6th crossbeam 416 cooperates with isolation board 43 is as shown in figure 9, isolation board 43 corresponding to the 6th crossbeam 416
Spacing between the lower end surface of the 6th crossbeam 416 is H1.Structure such as Figure 10 institute that middle beam and isolation board 43 cooperate
Show, wherein by taking third crossbeam 413 as an example, the structure and the structure phase of third crossbeam 413 of the 4th crossbeam 414 and the 5th crossbeam 415
Together, the spacing between isolation board 43 and the lower end surface of the middle beam corresponding to middle beam is H2.411 He of first crossbeam
Second cross beam 412 and the structure that isolation board 43 cooperates are as shown in figure 11, corresponding to first crossbeam 411 and second cross beam 412 every
It is H1 from the spacing between plate 43 and first crossbeam 411 and the lower end surface of second cross beam 412.In one embodiment, spacing
H2 is greater than spacing H1, and the difference between spacing H2 and spacing H1 can be 1mm~3mm.According to heat transfer theory, it is located at second cross beam
Battery modules 4 between 412 and third crossbeam 413 and the battery modules 4 between the 5th crossbeam 415 and the 6th crossbeam 416
Rate of heat exchange with environment is much larger than the battery modules 4 of other positions and the rate of heat exchange of environment.Therefore, such as Figure 12~14
It is shown, it is respectively set between the first crossbeam 411, second cross beam 412 and the lower end surface and the lower cover 6 of the 6th crossbeam 416
There is third thermal insulation board 7.The height of the third thermal insulation board 7 and the value of H2-H1 are identical.The thermal coefficient of third thermal insulation board 7 is less than
1.5W/mK.It, can be heat-insulated by the third between crossbeam 41 and lower cover 6 after heat transfer to crossbeam 41 of battery modules 4
7 trap heat of plate is transmitted to lower cover 6, and then is lost in environment.The design can balance the battery modules 4 and ring of different location
The speed of heat exchange between border realizes battery modules even temperature effect.Third thermal insulation board 7 is recommended to use structure glue, using structure
Glue can be realized simultaneously preferable sealing, preferable heat insulation and preferably assemble intensity.
As shown in Figure 15 and Figure 16, emulation testing is carried out for battery pack in the prior art and battery pack of the present invention is respectively adopted
Temperature lowering curve figure.
Herein, it is emulated by taking the battery pack of 96 battery cores as an example, takes the mean temperature of each battery core upper surface to be used as and grind
Study carefully object, therefore there are 96 research objects；Simulation model is placed in air using free convection transient model, battery pack, voluntarily
Solution heat transfer free convection, 20 DEG C of battery pack initial temperature, -20 DEG C of environment temperature；Heat insulation structural bondline thickness H2-H3=4 milli
Rice, H1-H3=4 millimeters；Heat-insulated plate thickness H=2 millimeters；G1=G2=1 millimeters, heat-barrier material thermal coefficient 2.0W/mK；
Wherein, T_max indicates there is a maximum value, i.e. battery core upper surface mean temperature maximum value in 96 research objects；
T_min indicates there is a maximum value, i.e. battery core upper surface mean temperature maximum value in 96 research objects；T_diff indicates the temperature difference
Value, i.e. T_diff=T_max-T-min；
(there is thermal insulation board using battery pack in battery pack in the prior art (no thermal insulation board and heat insulation structural glue-line) and the present invention
With heat insulation structural glue-line) data comparison such as the following table 1:
Table 1
| Cool to 0 degree Celsius of time | Maximum temperature difference T_diff | |
| The prior art | 11210 seconds | 7.90 degree Celsius |
| The present invention | 14780 seconds | 4.48 degree Celsius |
| The heat-insulated even temperature effect of the present invention | Time extends 32% | The temperature difference reduces by 43% |
From the comparison in table 1 as can be seen that by using thermal-insulating body structure of the invention, increase in battery pack heat-insulated
Plate and heat insulation structural glue-line, can greatly improve the heat insulation effect of battery pack, and battery pack is delayed to cool to 0 DEG C of time, and
Maximum temperature difference is substantially reduced, to greatly reduce influence of the environment to battery.
In conclusion compared with prior art, battery pack provided by the present invention has the advantage that
The present invention provides a kind of battery packs with thermal-insulating body structure, pass through the stringer of isolation board and battery pack cabinet
Isolation between crossbeam realizes that isolation heat is transmitted to crossbeam and stringer from the circumferential surface of isolation board, and completely cuts off heat from cross
The transmitting of beam and stringer to isolation board slows down environment to the heating effect of battery to reduce influence of the environment to battery, and
It realizes battery pack even temperature effect, reduces cell degradation speed, improve battery active volume and service life；Overall structure is simple,
It is practical.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of battery pack characterized by comprising
Battery modules；
Battery pack cabinet, the battery pack cabinet include multiple crossbeams and multiple stringers, and the multiple crossbeam and multiple stringers limit
Fixed multiple mould group accommodating spaces, the battery modules are placed in the mould group accommodating space, each mould group accommodating space
One side be provided with an isolation board, the inside of isolation board and corresponding crossbeam corresponding to each mould group accommodating space
There is the first gap, and the medial surface of isolation board and corresponding stringer corresponding to each mould group accommodating space between face
Between have the second gap；
Liquid cooled module is set to the side that the isolation board deviates from the battery modules, the liquid cooled module and the battery mould
Group carries out heat transfer by the isolation board.
2. battery pack according to claim 1, which is characterized in that be filled in first gap and second gap
Heat-barrier material.
3. battery pack according to claim 1, which is characterized in that the medial surface of the stringer is provided with stringer overlap joint rib,
Stringer overlap joint rib includes clinch, and the overlapping part is in the lower section of the isolation board, and the upper surface of the clinch
The first thermal insulation board is provided between the lower surface of the isolation board.
4. battery pack according to claim 3, which is characterized in that the stringer overlap joint rib further includes being located at the clinch
Extension between the stringer, the clinch are bent downward relative to the extension, the extension and it is described every
Concordantly it is arranged from plate, and there is second gap between the extension and the isolation board.
5. battery pack according to claim 1, which is characterized in that the medial surface of the crossbeam is provided with crossbeam overlap joint rib,
The crossbeam overlap joint rib is located at the lower section of the isolation board.
6. battery pack according to claim 5, which is characterized in that the crossbeam includes positioned at the two of the battery pack cabinet
The end crossbeam at end is provided with the second thermal insulation board between the crossbeam overlap joint rib of the end crossbeam and the isolation board.
7. battery pack according to claim 6, which is characterized in that the crossbeam further includes between the end crossbeam
Middle beam, the spacing H1 corresponding to the end crossbeam between isolation board and the lower end surface of the end crossbeam is less than institute
State the spacing H2 between isolation board corresponding to middle beam and the lower end surface of the middle beam.
8. battery pack according to claim 7, which is characterized in that further include under being set to below the liquid cooled module
Lid, is provided with third thermal insulation board between the lower end surface and the lower cover of the end crossbeam.
9. battery pack according to claim 6, which is characterized in that the end crossbeam of one end of the battery pack cabinet includes
First crossbeam and second cross beam, the first crossbeam, the second cross beam and the stringer limit an accessory accommodating space, described
For accessory accommodating space for accommodating battery management system and high pressure electric appliance box, the side of the accessory accommodating space is provided with accessory
Isolation board, the edge of the accessory isolation board respectively with the medial surface of the first crossbeam, the second cross beam medial surface and
The medial surface of the stringer is bonded.
10. battery pack according to claim 9, which is characterized in that the liquid cooled module includes and the battery modules one
One corresponding liquid cooling plate unit, is provided with lower cover below the liquid cooled module, the crossbeam pass through the liquid cooling plate unit it
Between gap rear support on the lower lid；
Upper cover is provided with above the battery pack cabinet, the upper cover covers the mould group accommodating space and the accessory simultaneously
Accommodating space.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163147.5A CN109686894A (en) | 2019-03-05 | 2019-03-05 | Battery pack |
| PCT/CN2020/076947 WO2020177609A1 (en) | 2019-03-05 | 2020-02-27 | Battery pack |
| EP20767393.0A EP3937273A4 (en) | 2019-03-05 | 2020-02-27 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163147.5A CN109686894A (en) | 2019-03-05 | 2019-03-05 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109686894A true CN109686894A (en) | 2019-04-26 |
Family
ID=66197506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910163147.5A Pending CN109686894A (en) | 2019-03-05 | 2019-03-05 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109686894A (en) |
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| CN110233216A (en) * | 2019-05-27 | 2019-09-13 | 蜂巢能源科技有限公司 | Battery pack and vehicle |
| CN110690372A (en) * | 2019-08-16 | 2020-01-14 | 广汽新能源汽车有限公司 | Battery shell and battery system |
| CN111312956A (en) * | 2020-02-27 | 2020-06-19 | 爱驰汽车有限公司 | Battery pack, battery pack manufacturing apparatus, and battery pack manufacturing method |
| WO2020177609A1 (en) * | 2019-03-05 | 2020-09-10 | 爱驰汽车有限公司 | Battery pack |
| CN112018286A (en) * | 2019-05-31 | 2020-12-01 | 比亚迪股份有限公司 | Battery pack and vehicle |
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| CN112701408A (en) * | 2020-12-25 | 2021-04-23 | 孚能科技(赣州)股份有限公司 | Bottom plate structure of box body chassis, battery pack and automobile |
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| CN110233216B (en) * | 2019-05-27 | 2022-08-19 | 蜂巢能源科技有限公司 | Battery pack and vehicle |
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| CN112117398A (en) * | 2019-06-21 | 2020-12-22 | 比亚迪股份有限公司 | Vehicle with a steering wheel |
| CN112117398B (en) * | 2019-06-21 | 2022-03-18 | 比亚迪股份有限公司 | Vehicle with a steering wheel |
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| WO2020259135A1 (en) * | 2019-06-27 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | Battery pack, method for manufacturing same, and vehicle |
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