CN111564660A - Lithium battery pack capable of preventing voltage acquisition interference - Google Patents
Lithium battery pack capable of preventing voltage acquisition interference Download PDFInfo
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- CN111564660A CN111564660A CN202010563724.2A CN202010563724A CN111564660A CN 111564660 A CN111564660 A CN 111564660A CN 202010563724 A CN202010563724 A CN 202010563724A CN 111564660 A CN111564660 A CN 111564660A
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- Prior art keywords
- battery module
- module
- battery
- bus bar
- upper cover
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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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)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a lithium battery pack capable of preventing voltage acquisition from interfering, which comprises a shell, wherein a module supporting plate is arranged in the shell, a first battery module, a second battery module and a third battery module are arranged on the module supporting plate, and are connected in series, wherein the first battery module and the second battery module are adjacent, the front surfaces of the first battery module and the second battery module are oppositely arranged, the front surfaces of the second battery module and the third battery module are arranged in the same direction, and a space is arranged between the first battery module and the third battery module; the battery management system comprises a first battery module, a second battery module, a third battery module, a fourth battery module, a fifth battery module, a sixth battery. The invention can improve the collection accuracy, prolong the service life of the battery and reduce the problem of attenuation of the failure safety of the battery.
Description
Technical Field
The invention belongs to the technical field of lithium batteries for vehicles, and particularly relates to a lithium battery pack capable of preventing voltage acquisition interference.
Background
Along with the implementation of the domestic and foreign clean energy policy planning, the demand on clean energy is increasing, and under the guidance and promotion of policies, the industrialization of lithium ion batteries is rapidly promoted. The lithium ion battery generally has three packaging forms of a square metal shell, a cylindrical metal shell and a flexible packaging aluminum plastic film, wherein the square metal shell has the advantages of reliable assembly, cost and the like, so that the square metal shell becomes a main push packaging form in the market fields of power, energy storage, communication and the like.
A lithium ion battery is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Along with the implementation of the domestic and foreign clean energy policy planning, the demand on clean energy is increasing, and under the guidance and promotion of policies, the industrialization of lithium ion batteries is rapidly promoted. The battery becomes the most widely applied battery of a new energy automobile, but the battery cannot be overcharged or overdischarged (the service life of the battery is influenced or the battery is scrapped) in use. Therefore, a battery management system is required to collect data and protect the battery during the use of the battery to prevent the lithium ion battery from being damaged. The voltage acquisition requirement of the single lithium ion battery is very high when the lithium ion battery is charged and discharged, and the accuracy of the acquired voltage is ensured to be within +/-10 mv.
At present, the main performances of voltage, capacity and the like of a single lithium ion battery cannot meet the use requirements of application scenes, and the single lithium ion battery needs to be combined in series and parallel to adapt to the actual requirements of different users, a single battery module is formed after the lithium ion battery is connected in series and parallel, a power battery pack is formed after the single battery module is bridged, and the power battery pack needs a battery management system to collect and process the voltage and the temperature of each lithium ion battery in the use process and implement monitoring. The overcharge or overdischarge phenomenon of the lithium ion battery is prevented. In the process of bridging the battery module in the prior art, interference is generated when the power line and the acquisition line are collected at one point in a concentrated manner, so that the phenomena of inaccurate acquisition and large voltage difference (as shown in fig. 6, the voltage difference is 387mv) can cause a series of problems of life attenuation, battery failure, safety and the like.
In view of the above-mentioned drawbacks, the present designer actively makes research and innovation to create a lithium battery pack with a novel structure for preventing voltage acquisition from interfering, so that the lithium battery pack has industrial utility value.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a lithium battery pack that prevents voltage acquisition from interfering with the lithium battery pack.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lithium battery pack capable of preventing voltage acquisition interference comprises a shell, wherein a module supporting plate is arranged in the shell, a first battery module, a second battery module and a third battery module are arranged on the module supporting plate and are connected in series, the first battery module and the second battery module are adjacent, the front faces of the first battery module and the second battery module are opposite, the front faces of the second battery module and the third battery module are arranged in the same direction, and a space is arranged between the first battery module and the third battery module;
a first module upper cover is arranged above the first battery module and the second battery module, bent edge structures are arranged on two sides of the first module upper cover and used for limiting the first battery module and the second battery module to longitudinally move, a second module upper cover is arranged above the third battery module, bent edge structures are arranged on two sides of the second module upper cover and used for limiting the third battery module to longitudinally move, and a battery management system is arranged on the second module upper cover;
a first bus bar is welded on the first battery module, the first bus bar is connected with one end of the power line, the other end of the power line of the first bus bar is connected to the negative end of the load, a second bus bar is welded on the first battery module, the second bus bar is connected with one end of the power line, the other end of the power line of the second bus bar is connected to a third bus bar, the third bus bar is welded on the second battery module, a fourth bus bar is welded on the second battery module, the fourth bus bar is connected with one end of the power line, the other end of the power line of the fourth bus bar is connected with the fifth bus bar, the fifth bus bar is welded on a third battery module, a sixth bus bar is welded on the third battery module, the sixth bus bar is connected with one end of the power line, the other end of the power line of the sixth bus bar is connected to the positive end of the load, and the output end of the battery management system is connected and fixed with the acquisition terminal on each bus bar through an acquisition line.
Preferably, the lithium battery pack for preventing voltage collection interference is characterized in that the module supporting plate is fixed on the shell through a bolt.
Preferably, the lithium battery pack for preventing voltage acquisition interference has an insulating layer sandwiched between the first battery module and the second battery module.
Preferably, the lithium battery pack capable of preventing voltage acquisition interference is characterized in that the first module upper cover is fixed on the module supporting plate through a bent edge and connected through a bolt for limiting the transverse movement and the up-and-down movement of the first battery module and the second battery module.
Preferably, the lithium battery pack capable of preventing voltage acquisition interference is characterized in that the second module upper cover is fixed on the module supporting plate through a bent edge and fixedly connected to the shell through the module supporting plate through a bolt, and the second module upper cover is used for limiting the transverse movement and the vertical movement of the third battery module.
Preferably, the lithium battery pack capable of preventing voltage acquisition interference is characterized in that a protruding thread is arranged on the second module, a preformed hole is formed in the battery management system, and the protruding thread and the preformed hole are fixed on the second module through screws.
Preferably, the lithium battery pack for preventing voltage acquisition interference is characterized in that the insulating layer is a rubber layer.
Preferably, the lithium battery pack for preventing voltage acquisition interference is provided with an upper cover on the shell, and the upper cover is fixed on the shell through bolts.
By the scheme, the invention at least has the following advantages:
the battery modules are bridged through the power line, and the collection point and the power line are separated in the process of bridging, so that point interference can be effectively prevented, the collection accuracy is improved, the service life of the battery is prolonged, and the problem of weakening the failure safety of the battery is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of a wiring structure of a first battery module according to the present invention;
fig. 3 is a schematic view illustrating a wiring structure of a second battery module according to the present invention;
fig. 4 is a schematic view illustrating a wiring structure of a third battery module according to the present invention;
FIG. 5 is a voltage diagram of a different model of voltage cell of the present invention;
fig. 6 is a voltage diagram of a conventional battery of different types.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
As shown in fig. 1, a lithium battery pack for preventing voltage collection interference includes a housing 1, a module support plate 2 is disposed in the housing 1, a first battery module 3, a second battery module 4 and a third battery module 5 are disposed on the module support plate 2, and are connected in series, wherein the first battery module 3 and the second battery module 4 are adjacent to each other, and the front surfaces of the first battery module 3 and the second battery module 4 are opposite to each other, the front surfaces of the second battery module 4 and the third battery module 5 are disposed in the same direction, and a gap is formed between the first battery module and the third battery module;
the battery management device is characterized in that a first module upper cover 6 is arranged above the first battery module 3 and the second battery module 4, both sides of the first module upper cover 6 are provided with a bent edge structure for limiting the longitudinal movement of the first battery module 3 and the second battery module 4, a second module upper cover 7 is arranged above the third battery module 5, both sides of the second module upper cover 7 are provided with a bent edge structure for limiting the longitudinal movement of the third battery module 5, a battery management system 8 is arranged on the second module upper cover 7, an upper cover 9 is arranged on the shell 1, and the battery management device is fixed on the shell 1 through bolts.
The above embodiment is a positional relationship between the members of the present invention, and the following combinations are combined
The module supporting plate 2 is fixed on the shell 1 through bolts;
an insulating layer is sandwiched between the first battery module 3 and the second battery module 4;
the first module upper cover 6 is fixed on the module supporting plate 2 through a bent edge and connected through a bolt, and is used for limiting the transverse movement and the up-and-down movement of the first battery module 3 and the second battery module 4;
the second module upper cover 7 is fixed on the module supporting plate 2 through a bent edge, penetrates through the module supporting plate 2 through a bolt, is fixedly connected to the shell 1 and is used for limiting the transverse movement and the up-and-down movement of the third battery module 5;
the second module upper cover 7 is provided with a convex thread, the battery management system 8 is provided with a preformed hole, and the second module upper cover 7 is fixed by a screw passing through the convex thread and the preformed hole;
the invention has the advantages of higher firmness, limited movement of the battery modules and no interference between the battery modules.
In the first embodiment, the insulating layer is a rubber layer, the rubber is a rubber layer in the prior art to prevent interference between the second battery module and the third battery module, and a distance between the second battery module and the third battery module needs to be considered, but may be calculated by a person skilled in the art, which is not described in detail herein.
As shown in fig. 2, 3 and 4, in order to connect the battery modules through the power line, a first busbar 10 is welded on the first battery module 3, the first busbar 10 is connected with one end of the power line, the other end of the power line of the first busbar 10 is connected to the negative end of the load, a second busbar 11 is welded on the first battery module 3, the second busbar 11 is connected with one end of the power line, the other end of the power line of the second busbar 11 is connected to a third busbar 12, the third busbar 12 is welded on the second battery module 4, a fourth busbar 13 is welded on the second battery module 4, the fourth busbar 13 is connected with one end of the power line, the other end of the power line of the fourth busbar 13 is connected with a fifth busbar 14, the fifth busbar 14 is welded on the third battery module 5, and a sixth busbar 15 is welded on the third battery module 5, the sixth bus bar 15 is connected with one end of the power line, the other end of the power line of the sixth bus bar 15 is connected to the positive end of the load, the output end of the battery management system 8 is connected and fixed with the collecting terminal 16 on each bus bar through the collecting line, and the battery modules are connected in series through the connection of the power line.
Through the connection, through the detection of the detection device, as shown in fig. 5, when the current is 260mA, the dynamic pressure difference is 49mv, so that the anti-interference performance is improved, and the acquisition accuracy is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a prevent that voltage acquisition from disturbing lithium cell group which characterized in that: the battery pack comprises a shell (1), wherein a module supporting plate (2) is arranged in the shell (1), a first battery module (3), a second battery module (4) and a third battery module (5) are arranged on the module supporting plate (2) and are connected in series, the first battery module (3) and the second battery module (4) are adjacent, the front surfaces of the first battery module and the second battery module are opposite, the front surfaces of the second battery module (4) and the third battery module (5) are arranged in the same direction, and a space is arranged between the first battery module and the third battery module;
a first module upper cover (6) is arranged above the first battery module (3) and the second battery module (4), two sides of the first module upper cover (6) are provided with bent edge structures for limiting the first battery module (3) and the second battery module (4) to longitudinally move, a second module upper cover (7) is arranged above the third battery module (5), two sides of the second module upper cover (7) are provided with bent edge structures for limiting the third battery module (5) to longitudinally move, and a battery management system (8) is arranged on the second module upper cover (7);
the battery module comprises a first battery module (3), a first bus bar (10) welded on the first battery module (3), the first bus bar (10) connected with one end of a power line, the other end of the power line of the first bus bar (10) connected to a negative end of a load, a second bus bar (11) welded on the first battery module (3), the second bus bar (11) connected with one end of the power line, the other end of the power line of the second bus bar (11) connected to a third bus bar (12), the third bus bar (12) welded on a second battery module (4), a fourth bus bar (13) welded on the second battery module (4), the fourth bus bar (13) connected with one end of the power line, the other end of the power line of the fourth bus bar (13) connected with a fifth bus bar (14), the fifth bus bar (14) welded on a third battery module (5), and a sixth bus bar (15) welded on the third battery module (5), and a sixth bus bar (15) is connected with one end of the power line, the other end of the power line of the sixth bus bar (15) is connected to the positive end of the load, and the output end of the battery management system (8) is connected and fixed with a collection terminal (16) on each bus bar through a collection line.
2. The lithium battery pack for preventing the voltage acquisition interference according to claim 1, wherein: the module supporting plate (2) is fixed on the shell (1) through bolts.
3. The lithium battery pack for preventing the voltage acquisition interference according to claim 1, wherein: an insulating layer is sandwiched between the first battery module (3) and the second battery module (4).
4. The lithium battery pack for preventing the voltage acquisition interference according to claim 1, wherein: the first module upper cover (6) is fixed on the module supporting plate (2) through a bent edge and connected through a bolt for limiting the transverse movement and the up-and-down movement of the first battery module (3) and the second battery module (4).
5. The lithium battery pack for preventing the voltage acquisition interference according to claim 1, wherein: the second module upper cover (7) is fixed on the module supporting plate (2) through a bent edge, is fixedly connected to the shell (1) through the module supporting plate (2) penetrated by a bolt, and is used for limiting the transverse movement and the up-and-down movement of the third battery module (5).
6. The lithium battery pack for preventing the voltage acquisition interference according to claim 1, wherein: the battery management system is characterized in that the second module upper cover (7) is provided with a convex thread, the battery management system (8) is provided with a preformed hole, and the convex thread and the preformed hole are fixed on the second module upper cover (7) through screws.
7. The lithium battery pack for preventing the voltage acquisition interference according to claim 3, wherein: the insulating layer is a rubber layer.
8. The lithium battery pack for preventing the voltage acquisition interference according to claim 1, wherein: an upper cover (9) is arranged on the shell (1) and fixed on the shell (1) through bolts.
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CN202010563724.2A CN111564660A (en) | 2020-06-19 | 2020-06-19 | Lithium battery pack capable of preventing voltage acquisition interference |
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CN202010563724.2A CN111564660A (en) | 2020-06-19 | 2020-06-19 | Lithium battery pack capable of preventing voltage acquisition interference |
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