CN212209630U - Electric vehicle power supply and electric vehicle - Google Patents

Abstract

The utility model discloses an electric vehicle power and electric motor car relates to electric power energy technical field. The power supply of the electric vehicle comprises a plurality of lithium batteries, a PCB adapter plate and a protection plate, wherein the plurality of lithium batteries are connected with one another to form a battery pack, the battery pack comprises a total positive circuit and a total negative circuit, the protection plate is connected in series on the total negative circuit, and when the lithium batteries are in emergency, the protection plate can quickly cut off the circuit to protect the lithium batteries from being damaged; the PCB adapter plate is provided with a plurality of printing nickel sheets, printing copper wires respectively connected with the printing nickel sheets and a line concentration row connected with the printing copper wires, two sides of each printing nickel sheet are respectively provided with an electrode lug groove, an electrode lug of the lithium battery passes through the electrode lug groove and then is connected with the printing nickel sheet, the protection plate is provided with a voltage sampling line and a temperature sensing line, the voltage sampling line is connected with the line concentration row, and the temperature sensing line is connected with the lithium battery; the power supply of the electric vehicle has the advantages of low cost, labor saving, high reliability and high cost performance.

Description

Electric vehicle power supply and electric vehicle

Technical Field

The utility model relates to an electric power energy technical field particularly, relates to an electric vehicle power and electric motor car.

Background

In recent years, the electric vehicle industry in China is rapidly developed, and annual output and sales are continuously increased. With the rapid development of electric vehicles, people have higher and higher requirements on the endurance mileage, the service life and the safety performance of the electric vehicle in the use process, and the lithium ion battery pack used by the electric vehicle is also required to have higher service life, safety and cost performance.

In the prior art, most of lithium ion battery packs of electric vehicles adopt ternary lithium ion batteries with poor safety and lower protection level, and the connection of battery monomers adopts a screw and copper bar mode; when rust prevention measures are taken on the screw and the copper bar, the internal resistance of the lithium battery monomer is increased and unbalanced; the increase of the internal resistance can lead to the increase of the self-discharge of the lithium ion battery pack and shorten the service life of the lithium ion battery pack; the imbalance of the internal resistance can cause the protective plate to continuously heat, and can cause the lithium ion battery pack to catch fire and explode in serious cases; and the lithium ion battery pack fails after water is involved if the protection level is lower, and the lithium ion battery pack is subjected to fire explosion due to short circuit if the protection level is serious. Therefore, the safety, service life and cost performance of the lithium ion battery pack in the prior art cannot meet the higher and higher requirements of people on the electric vehicle.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric vehicle power and electric motor car to solve among the prior art lithium ion battery group life weak point, security poor and the low technical problem of price/performance ratio.

The embodiment of the utility model is realized like this:

the embodiment of the utility model provides an aspect provides an electric vehicle power supply, including a plurality of lithium cells, PCB keysets and protection shield, form the group battery after a plurality of lithium cell interconnect, the group battery includes an always just and an always burden, the protection shield is established ties on the return circuit of always burden, be equipped with a plurality of printing nickel pieces on the PCB keysets, the printing copper line of being connected respectively with a plurality of printing nickel pieces and the line concentration row of being connected with the printing copper line, the both sides of every printing nickel piece respectively set up a utmost point ear groove, the utmost point ear of lithium cell is connected with the printing nickel piece after passing utmost point ear groove, be equipped with voltage sampling line and temperature sensing line on the protection shield, voltage sampling line is connected with the line concentration row, the temperature sensing line is connected with the lithium cell.

In an alternative embodiment of the present invention, the power supply for an electric vehicle further comprises a protective layer disposed between two adjacent lithium batteries, and the protective layer is used for isolating the two adjacent lithium batteries.

The utility model discloses in the optional embodiment, above-mentioned electric vehicle power still includes the battery compartment, and a plurality of lithium cells, PCB keysets and protection shield all set up in the battery compartment, and always just fix on the battery compartment and stretch out in by the battery compartment with always burden.

The utility model discloses in the optional embodiment, above-mentioned battery compartment include the storehouse body and with storehouse body complex cang gai, a plurality of lithium cells and PCB keysets set up at the internal in storehouse, and the storehouse is covered and is equipped with polar line hole and layering, always just fixes respectively with always burden on the polar line hole and stretches out battery compartment by polar line hole, is formed with accommodation space between cang gai and the layering, and the protection shield setting is in accommodation space.

The utility model discloses in the optional embodiment, above-mentioned storehouse body includes the battery case and covers the insulating layer of battery case inner wall, and a plurality of lithium cells and PCB keysets set up in the insulating layer.

In the optional embodiment of the utility model, be equipped with the glan head on the above-mentioned polar line hole, always just fix respectively with always burden overhead and stretch out the battery compartment by the glan head.

In an alternative embodiment of the present invention, the cover further comprises a handle disposed on a surface of the cover.

In an alternative embodiment of the present invention, the insulating layer is an epoxy resin sheet layer.

In an alternative embodiment of the present invention, the lithium battery is a lithium iron phosphate battery.

The embodiment of the utility model provides a further aspect provides an electric vehicle, including the electric vehicle power of above-mentioned arbitrary item.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides an electric vehicle power supply and electric motor car, electric vehicle power supply include a plurality of lithium cells, PCB keysets and protection shield, form the group battery after a plurality of lithium cells interconnect, the group battery includes an always positive and an always negative, always positive and always negative are used for being connected with the device that waits to supply power, make electric motor car power supply for waiting to supply power the device power; the protection board is connected in series on the total negative loop, and when the lithium battery is in an emergency, the protection board can quickly cut off the circuit to protect the lithium battery from being damaged; the PCB adapter plate is provided with a plurality of printing nickel sheets, printing copper wires respectively connected with the printing nickel sheets and a line concentration row connected with the printing copper wires, two sides of each printing nickel sheet are respectively provided with an electrode lug groove, an electrode lug of the lithium battery passes through the electrode lug groove and then is connected with the printing nickel sheet, the protection plate is provided with a voltage sampling line and a temperature sensing line, the voltage sampling line is connected with the line concentration row, and the temperature sensing line is connected with the lithium battery; the printed copper wire on the PCB adapter plate is mutually communicated with the printed nickel sheet, and the printed copper wire is connected with the voltage sampling wire of the protection plate through the wire concentration row; the power supply of the electric vehicle has the advantages of low cost, labor saving, high reliability and no problems of rusting, looseness, excessive contact resistance and the like. The electric vehicle comprising the electric vehicle power supply has longer service life, higher safety and cost performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 diagram of an electric vehicle power supply provided in an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of an electric vehicle power supply according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a PCB adapter board in an electric vehicle power supply provided by an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery compartment in an electric vehicle power supply provided by an embodiment of the present invention;

fig. 5 is a schematic structural view of a cabin body in a power supply of an electric vehicle provided by an embodiment of the present invention;

fig. 6 is a schematic structural view of a compartment cover in an electric vehicle power supply provided by an embodiment of the present invention.

Icon: 100-electric vehicle power supply; 110-a battery pack; 111-lithium battery; 1111-tab; 120-PCB interposer; 121-printing nickel sheets; 122-printed copper wire; 123-a line concentration row; 124-polar ear canal; 130-a protective plate; 140-total positive; 150-total negative; 160-a protective layer; 170-battery compartment; 171-a cartridge body; 1711-battery box; 1712-an insulating layer; 172-bin cover; 1721-pressing bar; 1722-glan head; 1723-handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as 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 present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present embodiment provides an electric vehicle power supply 100, including a plurality of lithium batteries 111, a PCB adapter board 120, and a protection board 130, where the plurality of lithium batteries 111 are connected to each other to form a battery pack 110, where the battery pack 110 includes a total positive 140 and a total negative 150, and the total positive 140 and the total negative 150 are used to connect with a device to be powered, so that the electric vehicle power supply 100 supplies power to the device to be powered; the protection board 130 is connected in series to the loop of the total negative 150, when the battery pack 110 is in an emergency, the protection board 130 can rapidly cut off the circuit, and the battery pack 110 is protected from being damaged; referring to fig. 2 and 3 in combination, the PCB adapter plate 120 is provided with a plurality of printing nickel sheets 121, a printing copper wire 122 respectively connected to the printing nickel sheets 121, and a line collector 123 connected to the printing copper wire 122, two sides of each printing nickel sheet 121 are respectively provided with a tab slot 124, a tab 1111 of the lithium battery 111 passes through the tab slot 124 and then is connected to the printing nickel sheet 121, the protection plate 130 is provided with a voltage sampling line and a temperature sensing line, the voltage sampling line is connected to the line collector 123, and the temperature sensing line is connected to the lithium battery 111; compare in direct adoption bolt with voltage sampling line fixed on the copper bar, perhaps, with voltage sampling line beading on the nickel piece, do not adopt PCB keysets 120, the structure of printing nickel piece 121 and printing copper line 122, utmost point ear 1111 and the printing nickel piece 121 of lithium cell 111 are connected in this application, printing copper line 122 and the printing nickel piece 121 on the PCB keysets 120 switch on each other, printing copper line 122 is lower and save the manual work through the connection structure cost that the voltage sampling line of concentrated line row 123 and protection shield 130 links to each other, and the reliability is high, can not appear rustting, become flexible, contact the too high scheduling problem of resistance, in addition, voltage sampling line integration is on PCB keysets 120, make no unnecessary electric wire around group battery 110, circuit connection is reliable and stable.

It should be noted that pcb (printed Circuit board), which is called printed Circuit board and is also called printed Circuit board, is an important electronic component, a support for an electronic component, and a carrier for electrical connection of the electronic component. It is called a "printed" circuit board because it is made using electronic printing.

The emergency of the battery pack 110 includes, but is not limited to, overcurrent, undervoltage, and overtemperature, the protection board 130 is connected to the voltage sampling line and the line concentrator 123, the line concentrator 123 is connected to the battery pack 110 through the printed copper wire 122 and the printed nickel sheet 121, and the temperature sensing line is connected to the lithium battery 111; when the voltage sampling line detects that the battery pack 110 is over-current or under-voltage, or the temperature sensing line detects that the battery pack 110 is overheated, the circuit can be quickly cut off, and the battery pack 110 is protected from being damaged.

The connection mode of the tab 1111 of the lithium battery 111 and the printed nickel sheet 121 is not limited, and optionally, the tab 1111 of the lithium battery 111 and the printed nickel sheet 121 are connected in a soldering mode, the soldering connection can ensure the overcurrent safe cross-sectional area of the lithium battery 111, and the overcurrent does not generate heat, so that the battery pack 110 can be better protected.

Optionally, the lithium battery 111 is a lithium iron phosphate battery, which has high safety and long cycle life, and can effectively improve the safety and the service life of the electric vehicle power supply 100.

If the electric vehicle power supply 100 is installed on an electric vehicle, the electric vehicle power supply 100 will sway along with the vehicle during the running process of the vehicle, and therefore the electric vehicle power supply 100 needs to have better shock resistance; in addition, in the power supply process of the electric vehicle power supply 100, the lithium batteries 111 generate heat, the multiple lithium batteries 111 generate heat together and then can cause heat accumulation, and serious people can also cause fire explosion, so that the electric vehicle power supply 100 is required to have better heat insulation and flame retardance. In order to achieve the above purpose, referring to fig. 2, optionally, the electric vehicle power supply 100 further includes a protective layer 160 disposed between two adjacent lithium batteries 111, where the protective layer 160 is used to isolate the two lithium batteries 111, so as to achieve flame retardancy and shock absorption. The plurality of lithium batteries 111, the PCB interposer 120, and the protective layer 160 together form a stable integrated structure.

Optionally, the protective layer 160 is made of PU foam, which is also called PU sponge, PU foam, polyurethane sponge, etc., and is a novel multifunctional special foam material with rich performance and wide application. The PU foam is prepared by mixing foaming resin, foaming auxiliary agent and adhesive resin (to make the product have adhesiveness), and then foaming. Mixing Ethylene Vinyl Acetate (EVA) and other raw materials together, placing the mixture in a mould for foaming, and breaking closed pores by mechanical force to obtain the PU foam. The PU foam has the characteristics of heat preservation, heat insulation, sound absorption, shock absorption, flame retardance, static prevention, good air permeability and the like, is arranged between two adjacent lithium batteries 111, can effectively improve the safety of the battery pack 110, prevents the battery pack 110 from being damaged due to overheating, and prolongs the service life of the battery pack 110.

If the device to be powered has a good working condition or has a space for accommodating and protecting the electric vehicle power supply 100, the electric vehicle power supply 100 can be directly used for supplying power to the device to be powered; if the working condition of the power supply device is poor or the structure of the power supply device cannot better protect the power supply 100 of the electric vehicle, the structure for normally working the protection battery pack 110, the PCB adapter plate 120 and the protection plate 130 needs to be arranged in order to improve the safety and the service life of the power supply 100 of the electric vehicle.

Referring to fig. 1 and fig. 4, optionally, the electric vehicle power supply 100 further includes a battery compartment 170, the plurality of lithium batteries 111, the PCB adapter plate 120, and the protection plate 130 are all disposed in the battery compartment 170, and the battery compartment 170 seals the plurality of lithium batteries 111, the PCB adapter plate 120, and the protection plate 130 in an inner space thereof, so as to reduce an influence of an external environment on the plurality of lithium batteries 111, the PCB adapter plate 120, and the protection plate 130, and improve safety and a service life of the electric vehicle power supply 100; the total positive 140 and the total negative 150 are fixed on the battery compartment 170 and extend out of the battery compartment 170, so that the power supply 100 of the electric vehicle can be connected with a device to be powered to supply power to the device to be powered.

The shape of the battery compartment 170 is not limited as long as it can accommodate a plurality of lithium batteries 111, the PCB adaptor board 120, and the protection board 130. Optionally, the battery compartment 170 is a cuboid, under the condition that the lithium battery 111 and the adapter plate are mostly cuboids, the battery compartment 170 of the cuboid is more convenient for the positioning and installation of the lithium battery 111 and the adapter plate, and the utilization rate of the internal space is higher.

In order to facilitate the installation of the plurality of lithium batteries 111, the PCB pinboard 120 and the protection board 130, optionally, the battery compartment 170 includes a compartment body 171 and a compartment cover 172 matched with the compartment body 171, the plurality of lithium batteries 111 and the PCB pinboard 120 are arranged in the compartment body 171, the compartment cover 172 is provided with a polar line hole and a pressing bar 1721, the pressing bar 1721 can press the battery pack 110 to prevent the battery pack 110 and the battery compartment 170 from moving relatively, meanwhile, an accommodating space is formed between the compartment cover 172 and the pressing bar 1721, the protection board 130 is arranged in the accommodating space, and after the installation of the plurality of lithium batteries 111, the PCB pinboard 120 and the protection board 130 is completed, the compartment cover 172 is used for sealing the compartment body 171; the total positive electrode 140 and the total negative electrode 150 are respectively fixed on the polar wire holes and extend out of the battery bin 170 from the polar wire holes to be connected with a device to be powered.

Optionally, the bin cover 172 and the bin body 171 are formed by processing a 1mm thick carbon steel plate through a sheet metal process, all the folding joints are fully welded, and the inner surface and the outer surface are subjected to baking finish treatment. The carbon steel plate has low price and high strength, the waterproof performance, the antirust performance and the mechanical performance of the bin cover 172 and the bin body 171 are better after the full-length welding and the baking finish treatment of the folding seam, the service life is longer, and the cost performance of the power supply 100 of the electric vehicle is improved.

Storehouse lid 172 and storehouse body 171 mutually support for seal the storehouse body 171, in order to further improve the sealed grade between storehouse lid 172 and the storehouse body 171, optionally, set up a plurality of first screw holes along storehouse body 171 and storehouse lid 172 complex perisporium, simultaneously, set up corresponding second screw hole on the perisporium of storehouse lid 172, adopt waterproof bolt to pass second screw hole and first screw hole in proper order after fixed and sealed with storehouse lid 172 and storehouse body 171.

Optionally, a glan head 1722 is further disposed on the pole wire hole, and the total positive 140 and the total negative 150 are respectively fixed on the glan head 1722 and extend out of the battery compartment 170 from the glan head 1722. The glan head 1722 is also called a waterproof cable joint and a cable fixing head, and is widely applied to fixing and protecting wires and cables of mechanical equipment, electrical equipment of ships and corrosion-resistant equipment. Adopt glan head 1722 to fix total plus 140 and total minus 150, seal polar line hole simultaneously, make battery compartment 170 reach IP65 protection level, guarantee to wait that power supply unit does not have any influence to electric motor car power 100 under the extreme condition such as wading with rain, dust accumulation.

Wherein, IP in IP65 is an abbreviation of Ingress Protection, and IP class is a Protection class against foreign matter intrusion for an electrical equipment housing; 6 in IP65 is the dust protection rating, meaning dust ingress is completely prevented; IP65 was rated as waterproof, meaning that low pressure spray had no effect at any angle.

Referring to fig. 5, optionally, the bin body 171 includes a battery box 1711 and an insulating layer 1712 covering the inner wall of the battery box 1711, and the plurality of lithium batteries 111 and the PCB adapter board 120 are disposed in the insulating layer 1712. The insulating layer 1712 serves to isolate the battery pack 110 from the battery case 1711, to prevent conduction therebetween, and to limit the battery pack 110 in four directions, i.e., front, rear, left, and right, to prevent the battery pack 110 and the cartridge body 171 from moving relatively.

Optionally, the insulating layer 1712 is an epoxy board layer. Epoxy resins are organic high molecular compounds containing two or more epoxy groups in the molecule, and their relative molecular masses are not high except individually. The molecular structure of the epoxy resin is characterized in that a molecular chain contains active epoxy groups, and the epoxy groups can be positioned at the tail ends, in the middle or in a ring structure. Because the molecular structure contains active epoxy group, they can produce cross-linking reaction with several kinds of curing agent to form high polymer with three-dimensional network structure. The epoxy resin plate made of epoxy resin has the characteristics of strong adhesion, high dielectric property, surface leakage resistance, arc resistance, stable chemical property and the like, has excellent insulating property and certain strength, is used as the insulating layer 1712 of the battery box 1711, and can play a role in isolating the battery pack 110 from the battery box 1711 and fixing the battery pack 110.

For facilitating the movement and installation of the electric vehicle power supply 100, referring to fig. 6, optionally, the compartment cover 172 further includes a handle 1723, the handle 1723 is disposed on a surface of the compartment cover 172, and the handle 1723 can be used for opening and closing the compartment cover 172 and moving the electric vehicle power supply 100.

Optionally, the handle 1723 is connected with the bin cover 172 through a screw with a waterproof pad and a nut with a fine thread, the handle 1723 is provided with a first through hole, the bin cover 172 is provided with a second through hole corresponding to the first through hole, and the screw with the waterproof pad is connected with the nut with the fine thread after passing through the first through hole and the second through hole. The fine thread has the anti-loosening function, and can be matched with the screw glue for use during assembly, so that the effect of long-term anti-loosening can be achieved.

The embodiment also provides an electric vehicle which comprises the electric vehicle power supply 100, and has the advantages of long service life, high safety and high cost performance.

In the foregoing explanation of the electric vehicle power supply 100, the operation manner, the operation principle, and the like of the electric vehicle power supply 100 provided in the electric vehicle have been described in detail, and are not described again.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an electric vehicle power supply, its characterized in that, includes a plurality of lithium cells, PCB keysets and protection shield, and is a plurality of form the group battery behind the lithium cell interconnect, the group battery includes an always just and a total burden, the protection shield is established ties on the return circuit of total burden, be equipped with a plurality of printing nickel pieces on the PCB keysets, with a plurality of printing copper line that the printing nickel piece is connected respectively and with the line concentration row that the printing copper is connected, every the both sides of printing nickel piece respectively set up a utmost point ear groove, the utmost point ear of lithium cell passes behind the utmost point ear groove with the printing nickel piece is connected, be equipped with voltage sampling line and temperature sensing line on the protection shield, voltage sampling line with the line concentration row is connected, the temperature sensing line with the lithium cell is connected.

2. The electric vehicle power supply of claim 1, further comprising a protective layer disposed between two adjacent lithium batteries, the protective layer configured to isolate the two adjacent lithium batteries.

3. The power supply for an electric vehicle of claim 1, further comprising a battery compartment, wherein a plurality of said lithium batteries, said PCB adapter plate and said protective plate are disposed within said battery compartment, and said total positive and said total negative are fixed to and extend from said battery compartment.

4. The power supply of an electric vehicle as claimed in claim 3, wherein the battery compartment comprises a compartment body and a compartment cover matched with the compartment body, the plurality of lithium batteries and the PCB adapter plate are arranged in the compartment body, the compartment cover is provided with a polar line hole and a pressing strip, the total positive pole and the total negative pole are respectively fixed on the polar line hole and extend out of the battery compartment through the polar line hole, an accommodating space is formed between the compartment cover and the pressing strip, and the protection plate is arranged in the accommodating space.

5. The electric vehicle power supply of claim 4, wherein the cartridge body comprises a battery box and an insulating layer covering an inner wall of the battery box, and the plurality of lithium batteries and the PCB adapter plate are disposed in the insulating layer.

6. The power supply for electric vehicles according to claim 4, wherein a Glan head is provided on the pole wire hole, and the total positive and the total negative are respectively fixed on the Glan head and extend out of the battery compartment from the Glan head.

7. The electric vehicle power supply of claim 4, wherein the compartment cover further comprises a handle disposed on a surface of the compartment cover.

8. The electric vehicle power supply of claim 5, wherein the insulating layer is an epoxy board layer.

9. The electric vehicle power supply of claim 1, wherein the lithium battery is a lithium iron phosphate battery.

10. An electric vehicle comprising the electric vehicle power supply according to any one of claims 1 to 9.

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