CN114267864A - Integrated energy storage battery module and manufacturing method - Google Patents
Integrated energy storage battery module and manufacturing method Download PDFInfo
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- CN114267864A CN114267864A CN202111076492.9A CN202111076492A CN114267864A CN 114267864 A CN114267864 A CN 114267864A CN 202111076492 A CN202111076492 A CN 202111076492A CN 114267864 A CN114267864 A CN 114267864A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000032683 aging Effects 0.000 claims abstract description 6
- 230000010354 integration Effects 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 19
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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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- 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 an integrated energy storage battery module and a manufacturing method thereof. The invention has the beneficial effects that: before the battery becomes even annotate the liquid and toast before promptly ann battery module of design and assemble and form, then unify and become, change into the back and replace unqualified electric core, divide the appearance and detect again, every step is all replaced unqualified electric core, so after the battery is accomplished, circulate to module/pack line with the form of module promptly, assemble final battery pack again. Therefore, the production cycle of the battery pack can be shortened, the tooling fixtures such as battery formation, aging and capacity grading sections are basically eliminated, the process of pack manufacturing is reduced, the investment cost of pack lines is reduced, and the manufacturing cost is greatly reduced. Meanwhile, due to the modular design, the whole system is convenient to transport, install and maintain, and the life cycle cost of the energy storage system is reduced.
Description
Technical Field
The invention relates to an energy storage battery module, in particular to an integrated energy storage battery module and a manufacturing method thereof, belonging to the technical field of large-scale energy storage of lithium ion batteries.
Background
At present, in the field of large energy storage of lithium ion batteries, lithium battery monomers are firstly combined into a module in a series-parallel connection mode, then the module is assembled into a battery pack in a series-parallel connection mode, the battery pack is further combined into a battery cluster in a series-parallel connection mode, and then a plurality of battery clusters are fixed in a container to form a large energy storage system. Because a large amount of structural materials are needed for the battery module and the battery pack, the manufacturing period of the battery module and the battery pack is long, the process is complex, and repeated operation is included, the manufacturing efficiency of the whole energy storage system is reduced, and the manufacturing cost is improved.
With the development of the energy storage market, users require that the energy storage system has higher concentration degree, and the stored energy in unit volume is increased, so that the use of large batteries and the reduction of structural members in the energy storage system which do not provide energy storage are effective methods, and the energy storage system is required to still meet the technical requirements of structural strength, heat dissipation and the like while increasing the volume energy density. The energy storage project has higher requirements on service life and consistency, so that the battery composition of batteries which are as fresh as possible in the same batch number is required to ensure consistency and higher initial available capacity.
However, the prior art still uses the assembly design according to the assembly steps of battery-battery module-battery pack-battery cluster, so that the prior art includes a large number of repeated steps (such as battery sorting, battery grouping, etc.), the production period is long, and the batteries and the battery modules are separately and discontinuously produced, which results in the reduction of the initial capacity of the batteries, and in addition, the additional increase of parts and transportation, thus the manufacturing cost is high.
Disclosure of Invention
The invention aims to solve the problems and provide an integrated energy storage battery module and a manufacturing method thereof.
The invention realizes the purpose through the following technical scheme: an integrated energy storage battery module comprises
The battery pack shell is of a square basket-shaped structure, and a positive terminal and a negative terminal which are respectively positioned at two ends and a BMU (battery management unit) positioned between the positive terminal and the negative terminal are arranged on the side wall of one side of the battery pack shell;
the integration module, it is provided with a plurality of to settle on the inside bottom plate of battery package shell, the integration module is by a plurality of battery cells that set up side by side, be located the end plate in both ends battery cell outside and connect the portable slide rail of connecting at both ends end plate with one side edge, just the formation partial volume of integration module includes that the monocell becomes partial volume and battery module directness formation partial volume is two kinds.
As a still further scheme of the invention: and protective cotton or insulating sheets are filled between the single batteries.
As a still further scheme of the invention: the unit cell component capacity of the integrated module comprises:
and adjusting the space between the single batteries to be the same as the space between the needle beds of the adjustable component and capacity cabinet, and corresponding the positions of the positive and negative poles of the single batteries to the positions of the needle beds of the adjustable component and capacity cabinet.
As a still further scheme of the invention: one way for the integrated module to perform the direct component capacity division of the battery module is to connect the component capacities in parallel:
the needle bed of the chemical composition container cabinet corresponds to the positive and negative pole positions of the battery in the integrated module, each pair of positive and negative needles of the needle bed are in parallel connection, and the voltage and the current correspond to the voltage and the current of the single battery.
As a still further scheme of the invention: the other way of the integrated module to directly convert the battery module into the component capacity is to serially connect the components:
connecting sheets among the battery cores are arranged on the integrated module, the chemical-capacitance needle bed only has positive and negative needles which are tightly connected with the total positive output and the total negative output of the integrated module to work, and the other needles only play a role in pressing connection, and the voltage and the current of the chemical-capacitance needle bed correspond to the voltage and the current of the integrated module.
A method for producing an integrated energy storage battery module comprises the following steps
1. Firstly, placing the single batteries after liquid injection into a bottom shell of a battery pack shell according to the number of the single batteries designed by a module, and then filling protective cotton or insulating sheets among the single batteries;
2. the module is fixed by end plates at the front end and the rear end, and then the front end plate and the rear end plate are locked by movable sliding rails, so that the force applied to the battery cell is a set pre-tightening force;
3. placing the assembled module into a high-temperature aging room for standing;
4. placing a plurality of aged modules in the same batch in a formation system, performing simultaneous and synchronous formation, and replacing the cells which do not meet the requirement in the modules into qualified cells according to set sorting conditions;
5. the module is aged, stood, classified and sorted according to the process flow and then directly operated to a pack assembly line, and during the process, cells which do not meet the requirements are all replaced by qualified cells;
6. assembling qualified modules after production into packs in a series-parallel connection mode or directly assembling into a battery cluster;
7. when the battery pack is directly assembled, the module is placed on a battery frame, and then side plates on two sides of the battery are installed;
8. finally, an upper cover plate and a front cover plate are installed, and a power cable is connected with the communication cable to form a complete battery cluster;
9. formation or capacity grading: according to the integrated battery module, monocell formation and partial capacity can be applied, or the battery module is directly formed into partial capacity, when the monocell formation and partial capacity is carried out, the space and the position of a needle bed of a formation and partial capacity cabinet are adjusted to correspond to the positions of a positive pole and a negative pole of a battery, the normal formation and partial capacity process is carried out, and the shell of the battery module is only equivalent to a tool clamp for replacing the formation and partial capacity; when the battery module is used for direct capacity division, the following two methods can be adopted: 1. parallel formation and grading, wherein needle beds of the formation and grading cabinet are designed to correspond to the positions of positive and negative poles of the battery in the module, pairs of positive and negative needles of the needle beds are in parallel connection, the voltage and the current correspond to the voltage and the current of the single battery, and the positive and negative needles of the needle beds are tightly connected with the positive and negative poles of the battery and then are carried out according to the formation and grading process of the single battery; 2. the components and the capacities are connected in series, connecting sheets among the electric cores are arranged on the battery module, at the moment, the needle beds of the components and the capacities only work by positive needles and negative needles which are closely connected with the total positive output and the total negative output of the battery module, other needles only play a role in compression connection, the voltage and the current of the needles correspond to the voltage and the current of the battery module, and the components and the capacities are carried out according to the components and the capacities process of the battery module.
The invention has the beneficial effects that: the battery pack is characterized in that the composition of the battery module is designed in the energy storage system design stage, the battery module is assembled before the battery formation even before liquid injection baking, the battery module is unified, unqualified battery cores are replaced after the battery formation, the capacity grading and the detection are carried out, the unqualified battery cores are replaced in each step, and the battery pack is finally assembled after the battery is completed and is transferred to a module/pack line in a module mode. Therefore, the production cycle of the battery pack can be shortened, the tooling fixtures such as battery formation, aging and capacity grading sections are basically eliminated, the investment cost of pack lines is reduced by the pack manufacturing process, and the manufacturing cost is greatly reduced. Meanwhile, due to the modular design, the whole system is convenient to transport, install and maintain, and the service life cost of the energy storage system is reduced.
Drawings
Fig. 1 is a schematic view of a battery pack according to the present invention.
Fig. 2 is a schematic structural diagram of an integrated module according to the present invention.
In the figure: 1. battery package shell, 2, integration module, 21, battery cell, 22, end plate, 23, movable slide rail, 3, connection piece, 4, BMU and 5, positive and negative terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-2, an integrated energy storage battery module includes
The battery pack shell 1 is of a square basket-shaped structure, and the side wall of one side of the battery pack shell is provided with a positive terminal 5 and a negative terminal 5 which are respectively positioned at two ends, and a BMU4 which is positioned between the two terminals of the positive terminal 5 and the negative terminal 5;
In the embodiment of the present invention, the unit cells 21 are filled with protective cotton or insulating sheets.
In an embodiment of the present invention, the single battery component capacity of the integrated module 2 includes:
the space between the single batteries 21 is adjusted to be the same as the space between the needle beds of the component and volume cabinet, and the positions of the positive and negative poles of the single batteries 21 correspond to the positions of the needle beds of the component and volume cabinet.
In the embodiment of the present invention, one way for the integrated module 2 to perform direct formation and partial capacity conversion of the battery module is to connect formation and partial capacity in parallel:
the needle beds of the chemical composition grading cabinet correspond to the positive and negative pole posts of the battery in the integrated module 2, the positive and negative needles of the needle beds are in parallel connection, and the voltage and the current correspond to the voltage and the current of the single battery 21.
In the embodiment of the present invention, another way for the integrated module 2 to directly convert the battery module into the component capacity is to serially connect the component capacities:
the connecting sheet 3 between the electric cores is arranged on the integrated module 2, the chemical composition capacity needle bed only works with positive and negative needles which are closely connected with the total positive output and the total negative output of the integrated module 2, other needles only play a role of pressing connection, and the voltage and the current of the needle bed correspond to the voltage and the current of the integrated module 2.
A method for producing an integrated energy storage battery module comprises the following steps
1. Firstly, the single batteries 21 after liquid injection are put into a bottom shell of a battery pack shell 1 according to the number of the single batteries 21 designed by a module, and then protective cotton or insulating sheets are filled among the single batteries 21;
2. the module is fixed by end plates 22 at the front end and the rear end, and then the front end plate 33 and the rear end plate 33 are locked by a movable sliding rail 23, so that the force applied to the battery cell is a set pre-tightening force;
3. placing the assembled module into a high-temperature aging room for standing;
4. placing a plurality of aged modules in the same batch in a formation system, performing simultaneous and synchronous formation, and replacing the cells which do not meet the requirement in the modules into qualified cells according to set sorting conditions;
5. the module is aged, stood, classified and sorted according to the process flow and then directly operated to a pack assembly line, and during the process, cells which do not meet the requirements are all replaced by qualified cells;
6. assembling qualified modules after production into packs in a series-parallel connection mode or directly assembling into a battery cluster;
7. when the battery pack is directly assembled, the module is placed on a battery frame, and then side plates on two sides of the battery are installed;
8. finally, an upper cover plate and a front cover plate are installed, and a power cable is connected with the communication cable to form a complete battery cluster;
9. formation or capacity grading: according to the integrated battery module, monocell formation and partial capacity can be applied, or the battery module is directly formed into partial capacity, when the monocell formation and partial capacity is carried out, the space and the position of a needle bed of a formation and partial capacity cabinet are adjusted to correspond to the positions of a positive pole and a negative pole of a battery, the normal formation and partial capacity process is carried out, and the shell of the battery module is only equivalent to a tool clamp for replacing the formation and partial capacity; when the battery module is used for direct capacity division, the following two methods can be adopted: 1. parallel formation and grading, wherein needle beds of the formation and grading cabinet are designed to correspond to the positions of positive and negative poles of the battery in the module, pairs of positive and negative needles of the needle beds are in parallel connection, the voltage and the current correspond to the voltage and the current of the single battery, and the positive and negative needles of the needle beds are tightly connected with the positive and negative poles of the battery and then are carried out according to the formation and grading process of the single battery; 2. the components and the capacities are connected in series, connecting sheets among the electric cores are arranged on the battery module, at the moment, the needle beds of the components and the capacities only work by positive needles and negative needles which are closely connected with the total positive output and the total negative output of the battery module, other needles only play a role in compression connection, the voltage and the current of the needles correspond to the voltage and the current of the battery module, and the components and the capacities are carried out according to the components and the capacities process of the battery module.
Example two
An integrated battery module is formed by connecting eight single batteries in series, three integrated battery modules are placed in a pack box and assembled with other components such as a BMU (BMU) into a battery pack, and the implementation steps are as follows:
1. firstly, placing eight battery cores after liquid injection into a bottom shell of a module according to the number of the battery cores designed by the module, and then filling protective cotton among the battery cores;
2. the module is fixed by end plates at the front end and the rear end, and then the front end plate and the rear end plate are locked by a sliding rod capable of sliding back and forth, so that the force applied to the battery cell is a set pre-tightening force which is set to 3000N;
3. placing the assembled module into a high-temperature aging room for standing;
4. placing the aged modules in the same batch in a formation system, performing simultaneous and synchronous formation, and forming the modules by adopting a series formation process of the modules, so that the electric quantity contained in each single battery is consistent, and after the formed single battery with larger voltage deviation is picked out, supplementing qualified batteries in other modules;
5. the modules are aged, stood, subjected to capacity grading and sorted according to the process flow and then directly operated to a pack assembly line, in the process, the cells which do not meet the requirements are all replaced into qualified cells, and the capacity grading also adopts the serial capacity grading process of the modules;
6. assembling qualified modules after production into a pack according to a mode of connecting 3 groups in series;
7. and finally, placing the pack bag on a battery rack to form a battery cluster.
The working principle is as follows: the battery pack is characterized in that the composition of the battery module is designed at the design stage of the energy storage system, the battery module is assembled before the battery formation or even before liquid injection and baking, the battery module is unified (or formed after liquid injection), unqualified battery cores are replaced after the formation, the capacity grading and the detection are carried out, the unqualified battery cores are replaced at each step, and after the battery is completed, the battery pack is transferred to a module/pack line in a module mode and then assembled into a final battery pack.
It will be clear to a person skilled in the art that the present invention is not limited to the details of the exemplary embodiments presented above, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description of the embodiments is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An integrated energy storage battery module, characterized in that: comprises that
The battery pack shell (1) is of a square basket-shaped structure, and the side wall of one side of the battery pack shell is provided with a positive terminal (5) and a negative terminal (5) which are respectively positioned at two ends, and a BMU (4) which is positioned between the two terminals of the positive terminal and the negative terminal (5);
integration module (2), it is provided with a plurality of, and settles on the inside bottom plate of battery package shell (1), integration module (2) is by a plurality of battery cell (21) that set up side by side, be located end plate (22) in both ends battery cell (21) outside and connect at both ends end plate (22) with portable slide rail (23) of edge, just the formation partial volume of integration module (2) includes that the monocell becomes partial volume and battery module directness formation partial volume is two kinds.
2. An integrated energy storage battery module according to claim 1, characterized in that: and protective cotton or insulating sheets are filled between the single batteries (21).
3. An integrated energy storage battery module according to claim 1, characterized in that: the integrated module (2) comprises the following components in terms of single battery formation capacity:
the space between the single batteries (21) is adjusted to be the same as the space between needle beds of the adjustment component and content cabinet, and the positions of the positive and negative poles of the single batteries (21) correspond to the positions of the needle beds of the adjustment component and content cabinet.
4. An integrated energy storage battery module according to claim 1, characterized in that: one way for the integrated module (2) to perform direct formation and grading of the battery module is to connect formation and grading in parallel:
needle beds of the chemical composition and grading cabinet correspond to the positive and negative pole positions of the battery in the integrated module (2), pairs of positive and negative needles of the needle beds are in parallel connection, and voltage and current correspond to the voltage and current of the single battery (21).
5. An integrated energy storage battery module according to claim 1, characterized in that: the other mode of the integrated module (2) for carrying out direct formation and partial capacity of the battery module is that the integrated module is connected in series:
connecting sheets (3) among the electric cores are arranged on the integrated module (2), the chemical-capacitance needle bed only has positive and negative needles which are closely connected with the total positive output and the total negative output of the integrated module (2) to work, and the other needles only play a role in pressing connection, and the voltage and the current of the chemical-capacitance needle bed correspond to the voltage and the current of the integrated module (2).
6. A method for manufacturing an integrated energy storage battery module according to claim 1, characterized in that the method comprises the following steps:
1) firstly, placing the single batteries (21) after liquid injection into a bottom shell of a battery pack shell (1) according to the number of the single batteries (21) designed by a module, and then filling protective cotton or insulating sheets among the single batteries (21);
2) the module is fixed by end plates (22) at the front end and the rear end, and then the front end plate and the rear end plate (33) are locked by a movable sliding rail (23), so that the force applied to the battery cell is a set pretightening force;
3) placing the assembled module into a high-temperature aging room for standing;
4) placing a plurality of aged modules in the same batch in a formation system, carrying out synchronous and synchronous formation, and replacing the non-compliant cells in the modules into qualified cells according to set sorting conditions;
5) the module is aged, stood, classified and sorted according to the process flow and then directly operated to a pack assembly line, and during the process, cells which do not meet the requirements are all replaced by qualified cells;
6) assembling qualified modules after production into packs in a series-parallel connection mode or directly assembling into a battery cluster;
7) when the battery pack is directly assembled, the module is placed on a battery frame, and then side plates on two sides of the battery are installed;
8) finally, an upper cover plate and a front cover plate are installed, and a power cable is connected with the communication cable to form a complete battery cluster;
9) formation or capacity grading: according to the integrated battery module, the single battery component and the partial capacity can be applied, or the battery module is directly component and the partial capacity, when the single battery component and the partial capacity are formed, the space and the position of a needle bed of a component and partial capacity cabinet are adjusted to correspond to the positions of a positive pole and a negative pole of a battery, the normal component and partial capacity process is carried out, and the shell of the battery module is only equivalent to a tool clamp for replacing the component and partial capacity;
when the battery module is directly formed into a partial capacity, the following two methods can be adopted: 1. parallel formation and grading, wherein needle beds of the formation and grading cabinet are designed to correspond to the positions of positive and negative poles of the battery in the module, pairs of positive and negative needles of the needle beds are in parallel connection, the voltage and the current correspond to the voltage and the current of the single battery, and the positive and negative needles of the needle beds are tightly connected with the positive and negative poles of the battery and then are carried out according to the formation and grading process of the single battery; 2. the components and the capacities are connected in series, connecting sheets among the battery cells are arranged on the battery module, at the moment, the needle beds of the components and the capacities only work by positive needles and negative needles which are closely connected with the total positive output and the total negative output of the battery module, other needles only play a role in compression connection, and the voltage and the current of the needles correspond to the voltage and the current of the battery module and are carried out according to the components and the capacities process of the battery module.
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| KR20200000321A (en) * | 2018-06-22 | 2020-01-02 | 에스케이이노베이션 주식회사 | Pouch case for secondary battery and secondary battery cell using the same |
| CN110364674A (en) * | 2019-06-11 | 2019-10-22 | 温州大学新材料与产业技术研究院 | A kind of soft-package battery of high voltage and preparation method thereof |
| CN210576197U (en) * | 2019-11-13 | 2020-05-19 | 南京晓庄学院 | Battery pack with leakage protection structure |
| CN112366362A (en) * | 2020-11-10 | 2021-02-12 | 江苏诺迪新能源科技有限公司 | Novel high-voltage lithium ion battery and preparation method thereof |
| CN214176137U (en) * | 2021-02-26 | 2021-09-10 | 青岛世纪领航科技有限公司 | Lithium battery pack convenient to disassemble, assemble and replace |
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