A kind of Local cooling battery module being applicable to flexible packing lithium ion battery
Technical field
The present invention relates to high capacity lithium ion battery technical field, particularly polylith flexible packing lithium ion battery monomer
Superposition integrated approach, the battery modular structure that especially battery local can be cooled down.
Background technology
Along with progress and the enhancing of human environment protection consciousness of science and technology, green energy resource industry both domestic and external is
Entering the stage of high speed development, electric motor car industry, communications industry and some special trade all start widely
Use the powerful lithium ion battery of high-energy as power supply, and to the weight ratio of power module and volume when
Safety proposes the highest requirement.For a long time, the safety of battery, the encapsulation of set of cells are tied by people
Structure and production efficiency etc. are carrying out various research always.
Lithium electron ion battery power is to be formed by multiple lithium-ion battery monomer assembled package.Large Copacity,
In the production of high-power lithium ion power supply, it is common that battery cell is carried out tandem compound and realizes high pressure, by electricity
Pond monomer carries out parallel combination and improves capacity.Battery cell, according to the difference of housing, has aluminum hull/box hat battery
With soft-package battery two kinds.It is good that aluminum hull/box hat battery cell has intensity, the advantage of outside simple and convenient assembly, but its
Plasticity is not as good as polymer flexible packaging lithium ion battery, when inside produces a large amount of gas, because of shell rigidity relatively
Can not discharge by force internal gas, the security incident such as easily set off an explosion.Flexible packing lithium ion battery monomer has
Flexible design, security performance is good, and heat-conductivity conducting performance is good, adaptive temperature width, can high current charge-discharge etc. excellent
Point, and substantially solve safety and life problems, become the first-selected product being currently used for making large power supply
Product.But, flexible packing lithium ion battery monomer is one layer of aluminum plastic film because of its outer package, and whole monomer is softer,
Reducing the compactibility of battery, battery core packaging film is easy to be punctured, and reduces its safety, the most effectively
Protection battery core packaging film is intact and ensures that the compactibility of battery becomes the weight that the design of battery unit package structure is to be solved
A point difficult problem.
On the other hand, in high current charge-discharge work process, due to the heating of battery, the heat of set of cells tires out
Long-pending, battery consistency can be caused to reduce, battery produces and expands, and have impact on the one of battery rear each battery in groups
Cause property and balanced important indicator, thus reduce the cycle life of battery.And, the heating master of battery
Battery pole ear near lug to be concentrated on, cools down, improves the soaking performance of set of cells the most effectively
And heat dispersion, become another emphasis difficult problem that the design of battery unit package structure is to be solved.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that one is applicable to flexible packing lithium ion battery
Local cooling battery module.
The object of the present invention is achieved like this:
A kind of Local cooling battery module being applicable to flexible packing lithium ion battery, including housing and multiple battery
Monomer, the plurality of battery cell is arranged in described housing with layered laminate, also include lug cooling device,
Strap and bottom coohng device;The edge sealing of described battery cell is anchored on lug cooling dress by strap
In cooling groove on the lug groove put and bottom coohng device.
Described lug cooling device is by lug cooling cavities, lug cooling cavities inlet and lug cooling cavities
Liquid outlet forms;The lug groove of up/down perforation, described battery cell top it is provided with in lug cooling cavities
Edge sealing be placed in described lug groove, lug passes in described lug groove.
Described bottom coohng device is by bottom coohng cavity, bottom coohng cavity inlet and bottom coohng cavity
Liquid outlet forms;The cooling groove of up/down perforation it is provided with, bottom described battery cell on bottom coohng cavity
Edge sealing be placed in this cooling groove.
The heat conductivity of described lug cooling cavities material is more than 300W/m DEG C;The appearance of lug cooling cavities
Face carries out oxidation processes or coated with thermally conductive insullac.
The heat conductivity of described bottom coohng cavity material is more than 300W/m DEG C, the appearance of bottom coohng cavity
Face carries out oxidation processes or coated with thermally conductive insullac.
Coating or the thermal conducting agent of filling in described lug groove, described thermal conducting agent is viscosity or half stickum.
Coating or the thermal conducting agent of filling in described cooling groove, described thermal conducting agent is viscosity or half stickum.
A kind of Local cooling battery module being applicable to flexible packing lithium ion battery that the present invention provides, in heating relatively
Being provided with chiller near big battery pole ear, the lug that lug cooling device is provided with up/down perforation leads to
Groove, the edge sealing on battery cell top is placed in this lug groove, and lug passes in this lug groove;Lug
Chiller is hollow structure, and coolant enters from lug cooling cavities inlet, goes out from lug cooling cavities
Liquid mouth flows out, and can be derived by heat more produced by lug, effectively battery pole ear is cooled down,
Improve soaking performance and the heat dispersion of set of cells.Battery module there is 0.2-0.5mm between adjacent cell monomer
Distance, fever expansion when can avoid battery operated and the mutual extruding that causes, improve the safety of battery.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the axonometric chart of embodiment of the present invention battery module.
Fig. 2 is the explosive view of Fig. 1.
Fig. 3 is the sectional view of Fig. 1.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Fig. 5 is the cascading schematic diagram of the embodiment of the present invention.
Component symbol illustrates:
Detailed description of the invention
The one provided embodiment of the present invention below in conjunction with the accompanying drawings and the specific embodiments is applicable to flexible package
The Local cooling battery module of lithium ion battery further describes in detail.
Seeing also Fig. 1 to Fig. 3, the present invention provides a kind of local being applicable to flexible packing lithium ion battery cold
But battery module 1, including: lug cooling device 10, strap 30, bottom coohng device 40 and multiple electricity
Pond monomer 20;The edge sealing 201 of battery cell 20 is fixed in lug cooling device 10 by strap 30
On lug groove and cooling groove on bottom coohng device 40 in.
This battery cell 20 is flexible packing lithium ion battery.Each battery cell 20 is one and can independently enter
The lithium ion battery of row discharge and recharge.The battery cell 20 of same battery module 1 have basically identical shape and
Size, can parallel with one another or series connection.This battery cell 20 can include lug 202, is used for being connected with each other also
It is connected with external circuit and carries out discharge and recharge.For ease of wiring, all battery cells 20 in same battery module 1
Lug 202 is arranged at the lateral surface of this battery module 1.This battery cell 20 surrounding has edge sealing 201,
It is thinner than battery mid portion.
Lug cooling device 10 is cold by lug cooling cavities 101, lug cooling cavities inlet 102 and lug
But cavity liquid outlet 103 forms;The lug groove of up/down perforation it is provided with, electricity in lug cooling cavities 101
The edge sealing 201 on pond monomer 20 top is placed in this lug groove, and lug 202 passes in this lug groove;
Lug cooling cavities 101 is hollow structure, and coolant (not shown) is from lug cooling cavities inlet 102
Enter, flow out from lug cooling cavities liquid outlet 103, can be by heat more produced by lug 202
Derive.
The structure of bottom coohng device 40 is close with lug cooling device 10, by bottom coohng cavity 401, the end
Portion's cooling cavities inlet 402 and bottom coohng cavity liquid outlet 403 form;On bottom coohng cavity 401
Being provided with the cooling groove of up/down perforation, the edge sealing 201 bottom battery cell 20 is placed in this cooling groove;
Bottom coohng cavity 401 is also hollow structure, and coolant (not shown) is from bottom coohng cavity inlet 102
Enter, flow out from bottom coohng cavity liquid outlet 103, the heat produced can be led bottom battery cell 20
Go out.
The side of lug cooling cavities 101 and bottom coohng cavity 401 is provided with groove, for strap 30
Carry out spacing.
The material of lug cooling cavities 101 and bottom coohng cavity 401 can be the material with higher heat-conductivity
Material (heat conductivity should be greater than 300W/m DEG C), such as metal, thus is beneficial to the heat of battery cell 20
Derive.The outer surface of lug cooling cavities 101 and bottom coohng cavity 401 need to carry out oxidation processes to ensure
Its surface insulation, or one layer of thermostable heat-conductive insullac of coating.
Refer to the distance summary between adjacent groove on Fig. 4, lug cooling cavities 101 and bottom coohng cavity 401
More than the thickness of battery cell 20, between adjacent cell monomer 20, there is the distance of 0.2-0.5mm, can keep away
Fever expansion when exempting from battery operated and the mutual extruding that causes.
Further, for strengthening heat dispersion, this battery module 1 also can further include at edge sealing 201 with
Coat or fill between contact surface between groove in lug cooling cavities 101 and bottom coohng cavity 401 leads
Thermit powder (not shown).This thermal conducting agent can be the viscosity or half stickum that heat conductivility is good, such as silicon
Glue.This thermal conducting agent can thoroughly get rid of the air between contact surface, reduces thermal resistance, improves heat dispersion.Separately
Outward, thermal conducting agent is also beneficial to fix this battery cell 20.
Fig. 5 show the another embodiment after the present invention carries out cascading, by long strap 50 the more
Individual battery module carries out cascading.