CN114122597B - Sodium ion battery module and electric vehicle - Google Patents
Sodium ion battery module and electric vehicle Download PDFInfo
- Publication number
- CN114122597B CN114122597B CN202111569114.4A CN202111569114A CN114122597B CN 114122597 B CN114122597 B CN 114122597B CN 202111569114 A CN202111569114 A CN 202111569114A CN 114122597 B CN114122597 B CN 114122597B
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- Prior art keywords
- sodium ion
- ion battery
- battery module
- circuit board
- negative electrode
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- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 171
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 210000004027 cell Anatomy 0.000 claims description 41
- 239000003063 flame retardant Substances 0.000 claims description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 9
- 210000005056 cell body Anatomy 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 13
- 229910001416 lithium ion Inorganic materials 0.000 description 13
- 239000002253 acid Substances 0.000 description 11
- 238000007726 management method Methods 0.000 description 8
- 239000011324 bead Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- 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
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
-
- 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
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
-
- 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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
Landscapes
- 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)
- Aviation & Aerospace Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a sodium ion battery module and an electric vehicle, which relate to the technical field of batteries, the sodium ion battery module comprises a shell and a plurality of sodium ion electric cores arranged in the shell, the sodium ion electric cores are mutually communicated to form a sodium ion battery unit, the surface of the shell is provided with a positive electrode interface and a negative electrode interface, the positive electrode of the sodium ion battery unit is used for being connected with external equipment through the positive electrode interface, and the negative electrode of the sodium ion battery unit is used for being connected with the external equipment through the negative electrode interface. The sodium ion battery module provided by the invention has the advantages of low cost, portability, small size and good use performance.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a sodium ion battery module and an electric vehicle.
Background
The electric vehicle is widely accepted by consumers due to the advantages of energy conservation, environmental protection, economical operation and the like, the existing electric vehicle generally adopts a lead-acid battery or a lithium ion battery as an electric energy source, the defects of large weight and volume of the lead-acid battery and insufficient travel mileage in winter bring a plurality of inconveniences to users, the lithium ion battery has high cost and is easy to cause explosion accidents, and the use mode on the electric vehicle is designed integrally, so that personalized design is required according to different vehicle types, the planning model is various, and the further popularization of the lithium ion battery is limited.
Meanwhile, sodium ion batteries have been increasingly used because of their portability and compactness. The sodium ion battery is developed for decades, and at present, the sodium ion battery enters the industrialized and large-scale application stage, and the low-temperature performance, the high-rate charge-discharge performance, the cycle performance and the like of the product are tested and verified in a large quantity, so that the sodium ion battery has market competitiveness against the counter balance of a lead-acid battery and a lithium ion battery.
Disclosure of Invention
The invention aims to provide a sodium ion battery module and an electric vehicle, which are low in cost, light, small and exquisite and have good use performance.
Embodiments of the present invention are implemented as follows:
The sodium ion battery module comprises a shell and a plurality of sodium ion electric cores arranged in the shell, wherein the sodium ion electric cores are mutually communicated to form a sodium ion battery unit, a positive electrode interface and a negative electrode interface are arranged on the surface of the shell, the positive electrode of the sodium ion battery unit is used for being connected with external equipment through the positive electrode interface, and the negative electrode of the sodium ion battery unit is used for being connected with the external equipment through the negative electrode interface.
Optionally, as an implementation manner, the lithium ion battery further comprises a circuit board arranged inside the shell, wherein the positive electrode and the negative electrode of the sodium ion battery unit are connected to the circuit board and are respectively communicated with a positive electrode connecting piece and a negative electrode connecting piece of the circuit board, and the positive electrode connecting piece and the negative electrode connecting piece are correspondingly arranged in the positive electrode interface and the negative electrode interface.
Optionally, as an implementation manner, the sodium ion battery cell includes a battery cell body, a buffer plate arranged on the battery cell body, and a tab arranged on the buffer plate, the tabs of two adjacent sodium ion battery cells are mutually communicated, a circuit board is erected on the buffer plate, and an opening is arranged on the circuit board and is used for accommodating the tab.
Optionally, as an implementation manner, a protection circuit is arranged on the circuit board, and the protection circuit is communicated with the sodium ion battery unit through the circuit board, or a fuse is arranged on the circuit board, and the fuse is communicated with the sodium ion battery unit through the circuit board.
Optionally, as an implementation manner, a fireproof flame-retardant layer is arranged on the inner wall of the shell, and the fireproof flame-retardant layer is attached to the sodium ion battery unit.
Optionally, as an implementation manner, the shell includes a shell body and a cover body that are fastened to each other, the positive electrode interface and the negative electrode interface are located on the surface of the cover body, and grooves penetrating through two opposite sides of the cover body are further formed on the surface of the cover body, and the grooves are used for limiting the pressing strips for fixing the sodium ion battery module.
Optionally, as an implementation manner, the system further comprises a battery management system, wherein the battery management system is used for monitoring the residual capacity of the sodium ion battery unit.
An electric vehicle comprising a frame, a battery box arranged on the frame, and the sodium ion battery module arranged in any one of the battery boxes.
Optionally, as an implementation manner, the solar cell module further comprises a pressing strip, the cell box comprises a plurality of supporting tables which are oppositely arranged, the sodium ion cell modules are arranged between the two supporting tables in a side-by-side laminating mode, and the pressing strip is arranged on the surfaces of the sodium ion cell modules and two ends of the pressing strip are fixed on the supporting tables.
Optionally, as an implementation manner, the device further comprises a controller, wherein the controller is electrically connected with the sodium ion battery module, and is used for controlling charge and discharge of the sodium ion battery module.
The beneficial effects of the embodiment of the invention include:
The sodium ion battery module comprises a shell and a plurality of sodium ion electric cores arranged in the shell, wherein the sodium ion electric cores are mutually communicated to form a sodium ion battery unit, a positive electrode interface and a negative electrode interface are arranged on the surface of the shell, the positive electrode of the sodium ion battery unit is used for being connected with external equipment through the positive electrode interface, and the negative electrode of the sodium ion battery unit is used for being connected with the external equipment through the negative electrode interface. According to the sodium ion battery module, the plurality of sodium ion battery cells are integrated in the shell for packaging, and the sodium ion battery modules with different capacities and sizes can be obtained by changing the serial and parallel connection modes among the plurality of sodium ion battery cells, the parameters of a single sodium ion battery cell and the size of the shell. The sodium ion battery core has the advantages of low cost, good safety and low-temperature performance, quick industrialization application and the like, and the sodium ion battery module prepared by the sodium ion battery core is low in cost, light, small and exquisite, has good usability, and can be used for replacing the existing lead-acid battery or lithium ion battery of an electric vehicle. The size of the shell is not larger than the outline size of the lead-acid battery or the lithium ion battery with corresponding capacity, and the height of the shell is the same as that of the lead-acid battery or the lithium ion battery, so that the lead-acid battery or the lithium ion battery in the existing electric vehicle can be replaced seamlessly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an external structure of a sodium ion battery module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an internal structure of a sodium ion battery module according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view at A-A in FIG. 2;
FIG. 4 is an enlarged partial schematic view at B in FIG. 3;
fig. 5 is a schematic connection diagram of a sodium ion battery unit in a sodium ion battery module according to an embodiment of the present invention;
FIG. 6 is an enlarged partial schematic view of FIG. 5C;
Fig. 7 is a schematic diagram of the operation of the sodium ion battery module.
Icon: a 100-sodium ion battery module; 111-positive electrode interface; 112-negative electrode interface; 113-a shell body; 114-a cover; 1141-grooves; a 120-sodium ion battery cell; 121-sodium ion cell; 1211-a cell body; 1212-a buffer plate; 1213-tab; 130-a circuit board; 131-opening; 132-a charge fet circuit; 133-rectifying/feedback unit; 134-power supply; 135-a micro control unit circuit; 136-shunt resistance; 137-communication circuit; 138-a charging interface; 140-fire retardant layer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 3, the present embodiment provides a sodium ion battery module 100, which includes a housing and a plurality of sodium ion electric cores 121 disposed in the housing, wherein the plurality of sodium ion electric cores 121 are mutually communicated to form a sodium ion battery unit 120, a positive electrode interface 111 and a negative electrode interface 112 are disposed on a surface of the housing, a positive electrode of the sodium ion battery unit 120 is used for connecting an external device through the positive electrode interface 111, and a negative electrode of the sodium ion battery unit 120 is used for connecting an external device through the negative electrode interface 112.
The sodium-ion cells 121 having a plurality of parameters including capacity, internal resistance, voltage, self-discharge, etc. within a set deviation range are connected in series or in parallel to be combined into one sodium-ion battery cell 120, and the sodium-ion battery cell 120 is packaged inside a case to form the sodium-ion battery module 100. The positive electrode and the negative electrode of the sodium ion battery unit 120 are connected with external devices through a positive electrode interface 111 and a negative electrode interface 112 on the casing, respectively.
The outer wall of the sodium ion electric core 121 can be square or cylindrical in a soft package, and the sodium ion electric cores 121 can be mutually fixed by double faced adhesive tape or fixing adhesive tape, so that relative displacement of the sodium ion electric core 121 and frictional heat generated in the using process are prevented. The housing may be a plastic housing or a metal housing, with a protection rating of IP67.
The sodium ion cells 121 may be sequentially connected in series or may be connected in parallel. Taking series connection as an example, a plurality of sodium ion cells 121 with parameters such as capacity, internal resistance, voltage, self-discharge and the like within a set deviation range are combined into a sodium ion battery unit 120 in a mode that positive and negative electrodes are staggered, and the positive electrode of the former sodium ion cell 121 is connected with the negative electrode of the latter sodium ion cell 121.
In the sodium ion battery module 100, a plurality of sodium ion battery cells 121 are integrated in a housing for packaging, and sodium ion battery modules 100 with different capacities and sizes can be obtained by changing the serial and parallel connection modes among the plurality of sodium ion battery cells 121, the parameters of a single sodium ion battery cell 121 and the size of the housing. The sodium ion battery cell 121 has the advantages of low cost, good safety and low-temperature performance, quick industrialized application and the like, and the sodium ion battery module 100 prepared by the sodium ion battery cell 121 is low in cost, light and small, has good usability, and can be used for replacing the existing lead-acid battery or lithium ion battery of an electric vehicle. The size of the shell is not larger than the outline size of the lead-acid battery or the lithium ion battery with corresponding capacity, and the height of the shell is the same as that of the lead-acid battery or the lithium ion battery, so that the lead-acid battery or the lithium ion battery in the existing electric vehicle can be replaced seamlessly.
Optionally, in an implementation manner of the embodiment of the present invention, the housing includes a housing body 113 and a cover 114 that are fastened to each other, the positive electrode interface 111 and the negative electrode interface 112 are located on a surface of the cover 114, a groove 1141 penetrating through two opposite sides of the cover 114 is further provided on the surface of the cover 114, and the groove 1141 is used for limiting a pressing strip for fixing the sodium ion battery module 100.
The case body 113 is used for accommodating the sodium ion battery unit 120, and the cover 114 can seal the sodium ion battery unit 120 after being buckled with the case body 113. The positive electrode interface 111 and the negative electrode interface 112 are disposed on the cover 114 to facilitate connection of the positive electrode and the negative electrode of the sodium ion battery unit 120 with external devices. When the sodium ion battery module 100 is installed in an electric vehicle, the sodium ion battery module 100 needs to be pressed in the battery box by a pressing bar so as to prevent the sodium ion battery module 100 from displacing in the battery box in the movement process. The recess 1141 on the surface of the cover 114 is used for limiting the bead, the bottom of the recess 1141 contacts with the surface of the bead, and two opposite sidewalls of the recess 1141 contact with two sidewalls of the bead to prevent the bead from displacing relative to the sodium ion battery module 100.
Optionally, in an implementation manner of the embodiment of the present invention, a fireproof flame-retardant layer 140 is disposed on an inner wall of the housing, and the fireproof flame-retardant layer 140 is adhered to the sodium ion battery unit 120.
The inner wall of the shell is coated with a fireproof flame-retardant material to form a fireproof flame-retardant layer 140, and the fireproof flame-retardant layer 140 is attached to the outer wall of the sodium ion battery unit 120 to play a role in flame retardance and heat insulation. When a plurality of sodium ion battery modules 100 are operated simultaneously, when a potential safety hazard (such as over-temperature, short circuit or combustion) occurs in a certain sodium ion battery module 100, heat diffusion can be prevented, and the safety level of the electric vehicle can be improved.
Referring to fig. 2 to 4, in an alternative implementation manner of the embodiment of the present invention, the device further includes a circuit board 130 disposed inside the housing, and the positive electrode and the negative electrode of the sodium ion battery unit 120 are connected to the circuit board 130 and respectively communicate with a positive electrode connecting piece and a negative electrode connecting piece of the circuit board 130, and the positive electrode connecting piece and the negative electrode connecting piece are correspondingly installed in the positive electrode interface 111 and the negative electrode interface 112.
The positive electrode of the sodium ion battery unit 120 is electrically connected with the positive electrode connecting piece on the circuit board 130 through the circuit board 130 coated with copper at a specific position, the negative electrode is electrically connected with the negative electrode connecting piece on the circuit board 130, and the sodium ion battery unit is correspondingly installed in the positive electrode interface 111 and the negative electrode interface 112 through the positive electrode connecting piece and the negative electrode connecting piece so as to be communicated with external equipment.
Optionally, in an implementation manner of the embodiment of the present invention, a protection circuit is disposed on the circuit board 130, and the protection circuit is connected to the sodium ion battery unit 120 through the circuit board 130, or a fuse is disposed on the circuit board 130, and the fuse is connected to the sodium ion battery unit 120 through the circuit board 130.
The sodium ion battery unit 120 outputs a charge-discharge interface through a protection circuit on the circuit board 130, and the protection circuit protects the sodium ion battery cells 121 after series connection or parallel connection from overcurrent, overtemperature, overcharge and the like. It should be understood that the voltage withstand level of the components on the protection circuit should not be lower than the voltage of the sodium ion battery unit 120, and the protection circuit may not include a discharge protection function, and the voltage withstand level of the components is selected according to the final voltage level of the sodium ion battery unit 120.
Referring to fig. 4 to 6, in an alternative implementation manner of the embodiment of the present invention, the sodium ion battery cell 121 includes a battery cell body 1211, a buffer plate 1212 disposed on the battery cell body 1211, and a tab 1213 disposed on the buffer plate 1212, the tabs 1213 of two adjacent sodium ion battery cells 121 are mutually communicated, the circuit board 130 is mounted on the buffer plate 1212, and an opening 131 is disposed on the circuit board 130, where the opening 131 is used for accommodating the tab 1213.
The battery core body 1211 is provided with a buffer plate 1212, the buffer plate 1212 is in contact with the circuit board 130, and is used for supporting the circuit board 130 and protecting the battery core body 1211 and the electrode lugs 1213, the buffer plate 1212 can conduct electricity, and the electrode lugs 1213 lead out positive and negative poles from the battery core body 1211 through the buffer plate 1212. The copper-clad position on the circuit board 130 is set according to the thickness of the sodium ion cell 121 so that the tabs 1213 of two adjacent sodium ion cells 121 are communicated by two-by-two double-folded welding. The circuit board 130 is provided with an opening 131 corresponding to the tab 1213, and the opening 131 is used for exposing the tab 1213 to prevent interference between the circuit board 130 and the tab 1213.
It should be understood that, when the sodium ion battery cells 121 include a plurality of sodium ion battery cells 121, the two tabs 1213 of the sodium ion battery cells 121 located in the middle are respectively communicated with the tabs 1213 of the sodium ion battery cells 121 located at two sides of the sodium ion battery cells, one tab 1213 of the sodium ion battery cells 121 located at two ends is communicated with the adjacent sodium ion battery cells 121, and the other tab serves as the positive electrode or the negative electrode of the sodium ion battery cell 120 and is communicated with the circuit board 130.
Optionally, in one implementation manner of the embodiment of the present invention, a battery management system is further included, where the battery management system is configured to monitor the remaining power of the sodium ion battery unit 120.
The battery management system is used for monitoring the residual electric quantity of the sodium ion battery unit 120, ensuring that the residual electric quantity is maintained in a reasonable range through intelligent management, preventing damage to the sodium ion battery module 100 due to overcharge or overdischarge, prolonging the service life of the sodium ion battery module 100, and monitoring the state of the sodium ion battery module 100. The charge and discharge management of the sodium ion battery module 100 is performed by the battery management system without adopting an overdischarge protection circuit, and the operation and protection function can be given to a controller or an external charger of the electric vehicle, so that the cost of the sodium ion battery module 100 is reduced.
Referring to fig. 7 in combination, for example, the circuit board 130 is further provided with a temperature sensor, a voltage/current sampling circuit, an equalizing circuit, a micro-control unit circuit 135, a charging fet circuit 132, a DC/DC (direct current to direct current) circuit, a communication circuit 137 and a rectifying/feedback unit 133, and the temperature sensor, the voltage/current sampling circuit, the equalizing circuit, the micro-control unit circuit 135, the charging fet circuit 132, the DC/DC circuit, the communication circuit 137 and the rectifying/feedback unit 133 are all connected with the sodium ion battery unit 120 through the circuit board 130. In addition, the communication circuit 137 is also connected to the power source 134, and the sodium ion battery unit 120 is also connected to the charging interface 138, and is connected to the negative electrode interface 112 through the shunt resistor 136.
The embodiment of the invention also discloses an electric vehicle, which comprises a frame, a battery box arranged on the frame and the sodium ion battery module 100 arranged in any one of the above battery boxes. The electric vehicle includes the same structure and advantageous effects as those of the sodium ion battery module 100 in the foregoing embodiment. The structure and the advantages of the sodium ion battery module 100 are described in detail in the foregoing embodiments, and are not described in detail herein.
Optionally, in an implementation manner of the embodiment of the present invention, the battery box further includes a batten, the battery box includes opposite support tables, the sodium ion battery module 100 includes a plurality of sodium ion battery modules 100, the plurality of sodium ion battery modules 100 are arranged between the two support tables in a side-by-side lamination manner, the batten is disposed on surfaces of the plurality of sodium ion battery modules 100, and two ends of the batten are fixed on the support tables.
Two opposite supporting tables are arranged in the battery box, a plurality of sodium ion battery modules 100 are arranged between the two supporting tables in a parallel fitting mode, two sodium ion battery modules 100 positioned at two ends are respectively attached to the side walls of the two supporting tables, and the bottoms of the sodium ion battery modules 100 are attached to the bottom of the battery box. The top of a plurality of sodium ion battery modules 100 is provided with a layering, and the both ends of layering extend to the surface of brace table and fix on the brace table, and layering compresses tightly a plurality of sodium ion battery modules 100 in the battery box is inside simultaneously to improve the fixed strength of electric motor car, prevent that sodium ion battery module 100 from taking place not hard up in the electric motor car driving process, ensure the reliability of sodium ion battery module 100 operation. The plurality of sodium ion battery modules 100 may be connected to each other using a connector, and the protection level of the connector may be IP67.
Optionally, in an implementation manner of the embodiment of the present invention, the apparatus further includes a controller, where the controller is electrically connected to the sodium ion battery module 100, and the controller is configured to control charging and discharging of the sodium ion battery module 100.
The controller of the electric vehicle is electrically connected with the sodium ion battery module 100, and can manage the charge and discharge of the sodium ion battery module 100 through the controller without adopting an overdischarge protection circuit, so that the cost of the sodium ion battery module 100 is reduced.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The sodium ion battery module is characterized by comprising a shell and a plurality of sodium ion electric cores arranged in the shell, wherein the sodium ion electric cores are mutually communicated to form a sodium ion battery unit, a positive electrode interface and a negative electrode interface are arranged on the surface of the shell, the positive electrode of the sodium ion battery unit is used for being connected with external equipment through the positive electrode interface, and the negative electrode of the sodium ion battery unit is used for being connected with the external equipment through the negative electrode interface;
the positive electrode and the negative electrode of the sodium ion battery unit are connected to the circuit board and are respectively communicated with a positive electrode connecting piece and a negative electrode connecting piece of the circuit board, and the positive electrode connecting piece and the negative electrode connecting piece are correspondingly arranged in the positive electrode interface and the negative electrode interface;
The sodium ion battery cell comprises a battery cell body, a buffer plate arranged on the battery cell body and lugs arranged on the buffer plate, wherein two adjacent lugs of the sodium ion battery cell are mutually communicated, the circuit board is erected on the buffer plate and is provided with an opening, the opening is used for accommodating the lugs, and the lugs penetrate through the opening and then bend towards the circuit board so as to be attached to the surface of the circuit board.
2. The sodium ion battery module of claim 1, wherein a protection circuit is provided on the circuit board, the protection circuit being in communication with the sodium ion battery cell through the circuit board, or a fuse is provided on the circuit board, the fuse being in communication with the sodium ion battery cell through the circuit board.
3. The sodium ion battery module of claim 1, wherein the inner wall of the housing is provided with a fireproof flame-retardant layer, and the fireproof flame-retardant layer is attached to the sodium ion battery unit.
4. The sodium ion battery module of claim 1, wherein the housing comprises a housing body and a cover body which are fastened to each other, the positive electrode interface and the negative electrode interface are positioned on the surface of the cover body, grooves penetrating through two opposite side surfaces of the cover body are further formed in the surface of the cover body, and the grooves are used for limiting a pressing bar for fixing the sodium ion battery module.
5. The sodium ion battery module of claim 1, further comprising a battery management system for monitoring a remaining charge of the sodium ion battery cells.
6. An electric vehicle comprising a frame, a battery box disposed on the frame, and the sodium ion battery module of any one of claims 1 to 5 disposed within the battery box.
7. The electric vehicle of claim 6, further comprising a batten, wherein the battery box comprises oppositely arranged support tables, the sodium ion battery modules comprise a plurality of sodium ion battery modules, the sodium ion battery modules are arranged between the support tables in a side-by-side fit mode, the batten is arranged on the surfaces of the sodium ion battery modules, and two ends of the batten are fixed on the support tables.
8. The electric vehicle of claim 6, further comprising a controller electrically connected to the sodium-ion battery module, the controller configured to control charging and discharging of the sodium-ion battery module.
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|---|---|---|---|---|
| WO2018055702A1 (en) * | 2016-09-21 | 2018-03-29 | エリーパワー株式会社 | Power storage device |
| CN109314201A (en) * | 2016-06-23 | 2019-02-05 | 本田技研工业株式会社 | Power storage device |
| CN211789129U (en) * | 2019-12-30 | 2020-10-27 | 马鞍山绿色兄弟科技有限责任公司 | A crimping board and automobile starting battery for automobile starting battery |
| CN217009392U (en) * | 2021-12-21 | 2022-07-19 | 江苏爱玛车业科技有限公司 | Sodium ion battery module and electric vehicle |
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| CN209981317U (en) * | 2019-06-13 | 2020-01-21 | 合肥新动安新能源科技有限公司 | Fireproof heat dissipation aluminum shell assembly for automobile power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314201A (en) * | 2016-06-23 | 2019-02-05 | 本田技研工业株式会社 | Power storage device |
| WO2018055702A1 (en) * | 2016-09-21 | 2018-03-29 | エリーパワー株式会社 | Power storage device |
| CN211789129U (en) * | 2019-12-30 | 2020-10-27 | 马鞍山绿色兄弟科技有限责任公司 | A crimping board and automobile starting battery for automobile starting battery |
| CN217009392U (en) * | 2021-12-21 | 2022-07-19 | 江苏爱玛车业科技有限公司 | Sodium ion battery module and electric vehicle |
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