CN102340033A - High-capacity lithium ion battery module - Google Patents

High-capacity lithium ion battery module Download PDF

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Publication number
CN102340033A
CN102340033A CN2011102945914A CN201110294591A CN102340033A CN 102340033 A CN102340033 A CN 102340033A CN 2011102945914 A CN2011102945914 A CN 2011102945914A CN 201110294591 A CN201110294591 A CN 201110294591A CN 102340033 A CN102340033 A CN 102340033A
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CN
China
Prior art keywords
battery
module
battery unit
battery module
lithium ion
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.)
Pending
Application number
CN2011102945914A
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Chinese (zh)
Inventor
要智勇
郑存卫
王小峰
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BEIJING SHENZHOU YUANWANG TECHNOLOGY CO LTD
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BEIJING SHENZHOU YUANWANG TECHNOLOGY CO LTD
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Priority to CN2011102945914A priority Critical patent/CN102340033A/en
Publication of CN102340033A publication Critical patent/CN102340033A/en
Pending legal-status Critical Current

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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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a high-capacity polymer lithium ion battery module, belonging to the field of lithium ion batteries, wherein the module is of a two-stage balanced parallel connection structure. The battery module is formed by connecting a plurality of battery units in parallel, equivalent circuit structures and same resistors are arranged from each battery unit to a module output end. Each battery unit is formed by connecting a plurality of battery monomers which are packaged with resin, no locator card, slot and the like are arranged inside each battery unit, and heat-radiating channels among the battery monomers are naturally formed based on borders obtained after monomer resin packaging, so that a favorable thermal balance is achieved while the mechanical strength of the batteries is effectively guaranteed. Ventilating ports are arranged on the upper part and the lower part of the battery module, and bus bars, positive output polar columns, negative output polar columns and a battery monitoring system are arranged on the upper parts of the battery units. The battery module in such a structure has high specific energy, and the dynamic balance of the monomers in the module is good during energy output. Meanwhile, the high-capacity polymer lithium ion battery module has the advantages of simple structure and high mechanical strength, can meet requirements on high impact and vibration of the battery module, and has the capacity reaching 2,000-10,000Ah.

Description

The high capacity lithium ion battery module
Technical field:
The present invention relates to field of batteries, be specifically related to the high capacity lithium ion battery module.
Background technology:
At present, along with the deficient and increasing environmental pollution pressure of fossil energy, the parent day by day who receives energy storage and vehicles power field as the lithium ion battery of one of emerging green energy resource looks at, and the shared market share is also increasing; Substitute conventional power source simultaneously also has a good application prospect in the military equipment field.Along with the expansion of lithium ion battery in application; The application of lithium-ion battery monomer and module is developed to big capacity, extensive direction by low capacity, small-scale gradually gradually; The monomer capacity is by developing into below five ampere-hours more than hundreds of ampere-hours, and the use scale is also developed into the connection in series-parallel application of thousands of batteries by several battery strings parallel connections.Big capacity, large-scale lithium ion battery applications have been brought new opportunity to develop to lithium ion battery, also fail safe, the reliability of lithium ion battery are had higher requirement simultaneously.
As everyone knows, under the prerequisite of output identical energy, contained battery cell quantity is few more in the battery module, and its internal circuit, mechanical structure are simple more, thereby the mechanical strength of battery module is high more, and the electric performance stablity property of output, reliability are also high more; Simultaneously, because tie point is few more in the battery module, need the point of control also few more, thereby the fail safe reliability of battery module is also just high more.
Summary of the invention:
Compose in parallel the high capacity lithium ion battery module and need that battery cell quantity is many, tie-point is many in order to solve the small-capacity cells monomer that adopts One's name is legion; The circuitous resistance of numerous monomers to output changes along with the difference of position; Cause between energy when output battery cell dynamic equalization poor, thereby along with the prolongation performance differentiation of service time.Because battery cell quantity is more, can cause battery modular structure complicated simultaneously, mechanical strength is low, the weakness of poor reliability.In order to address the above problem, the invention provides a kind of high capacity polymer lithium ionic cell module, output capacity can be up to 2000-10000Ah.Adopt the balanced parallel-connection structure of secondary to form by 12 to 30 cells; Solved the variability issues of forming battery cell to the battery module output that the high capacity cell module brings by the cell of One's name is legion; Thereby guarantee the electric performance stablity property of battery cell, have the advantage of high power capacity, high-energy-density, mechanical strength height, dependable performance simultaneously.
In order to reach the foregoing invention purpose, the technology path that the present invention adopts is to adopt the balanced parallel-connection structure of high capacity polymer lithium-ion battery monomer secondary to be combined into battery module, and is as shown in Figure 1.
Promptly form battery unit by battery cell, battery unit is formed battery module; A battery unit comprises several battery cells of the housing of packing into; Bus-bar, both positive and negative polarity output pole are arranged on battery unit top;
Adopt the range upon range of crimping parallel way of battery cell lug to form the dull and stereotyped output of each battery unit; From bus-bar derive just or negative pole output pole quantity identical with battery unit quantity, it is consistent with the battery cell arrangement direction that both positive and negative polarity is exported the pole orientation, and have identical distance between each battery unit and the nearest with it positive and negative terminals.
Further, it is characterized in that: each battery unit is made up of 2-6 battery cell, and each battery module comprises 3-9 battery unit.
Further, it is characterized in that: battery module comprises and is no more than 30 battery cells.
Adopt the range upon range of crimping parallel way of battery cell lug to form the dull and stereotyped output of battery unit, its direction that is parallel to the battery cell pole piece is a length direction, and the electric current moving direction to pole when discharging and recharging with module is parallel.A plurality of battery electrode columns are arranged on the both sides of bus-bar, and are arranged in a linear, and orientation is consistent with the direction of battery cell arrangement, and quantity is identical with battery unit quantity.The connection area of each battery unit and bus-bar is identical, the spacing between the battery unit output is identical; And the distance between the nearest with it positive and negative terminals is identical; Thereby each battery unit and nearest with it positive and negative terminals form an independently current channel; And the current channel that each battery unit forms has identical resistance, thereby each battery unit has the circuit structure of equivalence when the input and output electric current.
Battery cell adopts macromolecule resin material to encapsulate, and is lower to intensity, and the polymer Li-ion battery edge sealing of relatively easy wearing and tearing, leakage is protected.The battery cell lug is gone out several U-lags, as shown in Figure 2.The thickness that wherein encapsulates frame 1,3 is identical with the thickness of battery cell, and 2,4 thickness will exceed battery body thickness 0.5-2mm.Battery cell according to order anodal and that positive pole is corresponding, negative pole is corresponding with negative pole, is positioned in the housing of battery unit, and a battery unit is made up of 2-6 battery cell, and is as shown in Figure 3.The thickness of shell of battery unit is between 1.5 to 3mm, and the bottom has through hole with two faces that are parallel to battery pole piece, guarantees ventilation and heat radiation between the monomer.Simultaneously, by between the battery cell that forms of encapsulation frame apart from the heat radiation, the vent passages that form nature, satisfied the requirement of the expansion of electrodes of lithium-ion batteries simultaneously to the space.
The mode battery cell in the battery unit is anodal and negative pole employing crimping is parallel to together respectively.Copper battery cell parallel connection base plate has square groove in the bottom, in square groove, has several through holes; Square head screw is vertically passed through hole; Keep closely contacting with the square groove inner plane, the screw square head portion embeds in the square groove, and the plane is equal with base plate plane; Be welded into an integral body, as shown in Figure 4.
Battery pole ear in the battery unit is bent shaping, the base plate of band screw can be positioned between two battery cell lugs placed in the middle.Then base plate is parallel to encapsulation frame direction placement on the battery, and keeps U-lag corresponding with screw.In order successively with the battery pole ear bending, keep each U property groove to pass screw after letting, and lug and floor keeping parallelism after the bending.Each screw is passed on the battery cell and the through hole of yoke plate, use nut check then successively, accomplish the parallel connection of battery cell.
Battery unit is put into the battery module housing successively according to just relative, the negative right direction of negative; After the nut of battery unit laid down; With the output of integrated battery module positive and negative electrode pole be one positive and negative electrode bus-bar (as shown in Figure 5) pass the screw of battery cell parallel connection base plate, locking one by one then respectively.Install the location link stopper, accomplish the structure of battery cell, battery unit and fix.
Temperature, voltage detecting line that battery monitoring system is drawn are separately fixed on cell and the bus-bar.
Description of drawings
Fig. 1 battery module sketch map
Fig. 2 battery cell sketch map
Fig. 3 battery unit assembling sketch map
Fig. 4 battery cell parallel connection base plate sketch map
Fig. 5 bus-bar sketch map
Figure 62 I10 charging, 0.2I10, I10,2I10,5I10,10I10, discharge curve
Figure 70 .2I10, I10,2I10,5I10,10I10 charging, 2I10 are put curve chart
Figure 80 .2I10 constant-current constant-voltage charging, 500 curve charts of 0.2I 10 constant-current discharges circulation
Embodiment
Below in conjunction with description of drawings implementation result of the present invention preferred embodiment preferably.
Embodiment 1:
The 500Ah battery cell that adopts our company to produce adopts epoxide resin material that frame is encapsulated, and behind the completion of cure battery cell lug is gone out 5 U-lags, and is as shown in Figure 2.The thickness that wherein encapsulates frame 1,3 is identical with the thickness of battery cell, and 2,4 thickness will exceed cell thickness 3mm, the monolateral cell thickness 1.5mm that exceeds.A battery unit is made up of 4 500Ah battery cells, and battery cell according to order anodal and that positive pole is corresponding, negative pole is corresponding with negative pole, is positioned in the housing of battery unit, and is as shown in Figure 3.The thickness of shell of battery unit is 2mm, and the bottom has through hole with two faces that are parallel to battery pole piece, guarantees the heat radiation of battery.Simultaneously, the passage that is formed naturally by the 3mm constant spacing between the battery cell that forms of encapsulation frame can satisfy the ventilation of battery, the requirement of heat radiation, and the pole piece expansion was to the requirement in space when the while can be satisfied lithium ion battery and discharged and recharged.
The mode battery cell in the battery unit is anodal and negative pole employing crimping is parallel to together respectively.Copper battery cell parallel connection base plate has square groove in the bottom, in square groove, has several through holes; Square head screw is vertically passed through hole; The screw square head portion embeds in the square groove, and head keeps closely contacting with the square groove inner plane, and the plane is equal with base plate plane; Be welded into an integral body, as shown in Figure 4.
Battery pole ear in the battery unit is bent shaping, the base plate of band screw can be positioned between two battery cell lugs placed in the middle.Then base plate is parallel to encapsulation frame direction placement on the battery, and keeps U-lag corresponding with screw.In order successively with the battery pole ear bending, keep each U property groove to pass screw after letting, and lug and floor keeping parallelism after the bending.Each screw is passed on the battery cell and the through hole of yoke plate, use nut check then successively, accomplish the parallel connection of battery cell.
4 battery units are put into the battery module housing successively according to just relative, the negative right direction of negative; After the nut of battery unit laid down; With integrated 4 positive poles, 4 negative pole poles positive and negative electrode bus-bar (as shown in Figure 5) pass the screw of the base plate of battery cell parallel connection, locking one by one then respectively.Install the location link stopper, accomplish the fixing and assembling of battery cell, battery unit.
Temperature, voltage detecting line that the battery monitoring system that adopts IC control is drawn are separately fixed on cell and the bus-bar.
This embodiment battery module capacity can reach 8000Ah, and volumetric specific energy is 220Wh/L, and gravimetric specific energy can reach 135Wh/Kg.
The 2I of this embodiment battery module 10Constant-current constant-voltage charging, 0.2I 10, I 10, 2I 10, 5I 10, 10I 10The constant-current discharge curve is as shown in Figure 6.
The 0.2I of this embodiment 10, I 10, 2I 10, 5I 10, 10I 10Constant-current constant-voltage charging, 2I 10It is as shown in Figure 7 that curve is put in constant current.
The 0.2I of this embodiment 10Constant-current constant-voltage charging, 0.2I 10500 curves of constant-current discharge circulation are as shown in Figure 8.

Claims (3)

1. a high capacity polymer lithium ionic cell module is characterized in that: adopt balanced secondary parallel-connection structure: promptly form battery unit by battery cell, battery unit composition battery module;
A battery unit comprises several battery cells of the housing of packing into; Bus-bar, both positive and negative polarity output pole are arranged on battery unit top;
Adopt the range upon range of crimping parallel way of battery cell lug to form the dull and stereotyped output of each battery unit; From bus-bar derive just or negative pole output pole quantity identical with battery unit quantity, it is consistent with the battery cell arrangement direction that both positive and negative polarity is exported the pole orientation, and have identical distance between each battery unit and the nearest with it positive and negative terminals.
2. a kind of high capacity polymer lithium ionic cell module according to claim 1 is characterized in that: each battery unit is made up of 2-6 battery cell, and each battery module comprises 3-9 battery unit.
3. a kind of high capacity polymer lithium ionic cell module according to claim 1 is characterized in that: battery module comprises and is no more than 30 battery cells.
CN2011102945914A 2011-09-29 2011-09-29 High-capacity lithium ion battery module Pending CN102340033A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104716402A (en) * 2013-12-17 2015-06-17 北京有色金属研究总院 Power battery module
CN110943191A (en) * 2019-10-25 2020-03-31 杭州乾代科技有限公司 Lithium battery module and manufacturing method thereof
CN111029658A (en) * 2019-09-20 2020-04-17 杭州乾代科技有限公司 Manufacturing method of lithium battery module
CN111645542A (en) * 2016-10-05 2020-09-11 沃土电机股份有限公司 Electric vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090061289A1 (en) * 2004-08-05 2009-03-05 Shinji Hamada Battery Module, Battery Pack, and Method for Producing the Battery Module
CN101257130B (en) * 2007-02-28 2011-08-31 株式会社日立制作所 Lithium secondary battery
CN102187504A (en) * 2008-10-20 2011-09-14 日产自动车株式会社 Bipolar secondary battery, battery pack, and vehicle equipped with the same
CN202282408U (en) * 2011-09-29 2012-06-20 北京神州远望科技有限公司 High-capacity lithium-ion battery module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090061289A1 (en) * 2004-08-05 2009-03-05 Shinji Hamada Battery Module, Battery Pack, and Method for Producing the Battery Module
CN101257130B (en) * 2007-02-28 2011-08-31 株式会社日立制作所 Lithium secondary battery
CN102187504A (en) * 2008-10-20 2011-09-14 日产自动车株式会社 Bipolar secondary battery, battery pack, and vehicle equipped with the same
CN202282408U (en) * 2011-09-29 2012-06-20 北京神州远望科技有限公司 High-capacity lithium-ion battery module

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104716402A (en) * 2013-12-17 2015-06-17 北京有色金属研究总院 Power battery module
CN104716402B (en) * 2013-12-17 2018-04-27 北京有色金属研究总院 A kind of power battery module
CN111645542A (en) * 2016-10-05 2020-09-11 沃土电机股份有限公司 Electric vehicle
CN111029658A (en) * 2019-09-20 2020-04-17 杭州乾代科技有限公司 Manufacturing method of lithium battery module
CN110943191A (en) * 2019-10-25 2020-03-31 杭州乾代科技有限公司 Lithium battery module and manufacturing method thereof

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Application publication date: 20120201