CN108336275B - Battery pack of pure electric passenger car and electric car - Google Patents

Battery pack of pure electric passenger car and electric car Download PDF

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Publication number
CN108336275B
CN108336275B CN201810341577.7A CN201810341577A CN108336275B CN 108336275 B CN108336275 B CN 108336275B CN 201810341577 A CN201810341577 A CN 201810341577A CN 108336275 B CN108336275 B CN 108336275B
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China
Prior art keywords
fixing
welding piece
battery module
fixing plate
welding
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CN201810341577.7A
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Chinese (zh)
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CN108336275A (en
Inventor
王瑜
罗凯帆
袁承超
周鹏
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Sinoev Hefei Technologies Co Ltd
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Sinoev Hefei Technologies Co Ltd
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Priority to CN201810341577.7A priority Critical patent/CN108336275B/en
Publication of CN108336275A publication Critical patent/CN108336275A/en
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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The embodiment of the invention relates to the field of new energy batteries, in particular to a battery pack of a pure electric passenger car and an electric car. The battery pack for the pure electric passenger car comprises: casing, battery module, first fixed subassembly, second fixed subassembly, the welding piece, the sealing washer, the upper cover, a plurality of first connecting piece and a plurality of second connecting piece, the welding piece sets up in the casing, battery module, first fixed subassembly and second fixed subassembly set up in the welding piece, first fixed subassembly and second fixed subassembly set up in the battery module, some first connecting pieces connect between first fixed subassembly and battery module, other first connecting pieces connect between second fixed subassembly and battery module, some second connecting pieces connect between first fixed subassembly and welding piece, other second connecting pieces connect between second fixed subassembly and welding piece, the sealing washer sets up and the casing, the upper cover lock is in the casing. The pure electric passenger car can improve stability of the battery module and the battery pack during fixation.

Description

Battery pack of pure electric passenger car and electric car
Technical Field
The embodiment of the invention relates to the field of new energy batteries, in particular to a battery pack of a pure electric passenger car and an electric car.
Background
The power battery pack is an important component of the new energy electric vehicle, and the stable and reliable use of the power battery pack is directly related to the motor usability, the cruising ability, the safe running of the whole vehicle and the like of the new energy electric vehicle. The battery module is used as a core component of the power battery pack, and the structural stability of the battery module can influence the overall stability of the power battery pack. The stability that needs to be reached of power battery package is difficult to realize to current most battery module's fixed mode.
Disclosure of Invention
In view of the above, the invention provides a battery pack for a pure electric passenger car and an electric car, which can improve the stability of the battery module and the battery pack when the battery module and the battery pack are fixed, thereby improving the stability of the whole battery pack.
To achieve the above object, an embodiment of the present invention provides a battery pack for a pure electric passenger car, including: the battery module comprises a shell, a battery module, a first fixing assembly, a second fixing assembly, a welding piece, a sealing ring, an upper cover, a plurality of first connecting pieces and a plurality of second connecting pieces;
the shell comprises an accommodating groove with an opening, the welding piece is matched with the accommodating groove in size, and the welding piece is arranged in the accommodating groove and fixedly connected with the bottom wall of the shell;
the first fixing assembly corresponds to a plurality of fixing metal plates arranged on the periphery of the battery module, one end of part of the first connecting piece sequentially penetrates through the first fixing assembly and each fixing metal plate, and one end of the rest of the first connecting pieces sequentially penetrates through the second fixing assembly and one side face of the battery module; wherein the side surface is provided with through holes corresponding to the rest of the first connecting pieces;
the battery module is arranged on one side, far away from the bottom wall, of the welding piece, the part, far away from the periphery, of the first fixing component and the part, far away from the periphery, of the second fixing component are respectively corresponding to the edge of the welding piece, one end of part of the second connecting component sequentially penetrates through the edges of the first fixing component and the welding piece, and one end of the other second connecting components sequentially penetrates through the edges of the first fixing component and the welding piece;
the sealing ring is arranged at the edge of the opening, and the upper cover is buckled at the position, away from the opening, of the sealing ring.
Optionally, the battery module is in a cuboid structure, and the first fixing assembly comprises two first fixing plates;
the two first fixing plates are respectively attached to a first side face and a second side face of the battery module, and the first side face is opposite to the second side face;
each first fixing plate corresponds to the fixing metal plate arranged on the first side face and the second side face, and one end of part of the first connecting piece sequentially penetrates through each first fixing plate and each fixing metal plate corresponding to each first fixing plate.
Optionally, the fixing metal plate is provided with a fixing hole, the first fixing plate comprises a first module fixing plate and a first welding piece fixing plate, and the first module fixing plate and the first welding piece fixing plate are mutually perpendicular and integrally formed;
the first module fixing plate is provided with a positioning hole and a plurality of waist holes;
the first connecting piece comprises a positioning hole connecting piece and a plurality of waist hole connecting pieces, and the number of the waist hole connecting pieces is the same as that of the waist holes;
when each first module fixing plate is attached to each fixing metal plate corresponding to the first module fixing plate, each positioning hole and each waist hole are respectively corresponding to each fixing hole;
the positioning hole connecting pieces sequentially penetrate through the positioning holes and the fixing holes corresponding to the positioning holes, and the waist hole connecting pieces sequentially penetrate through the waist holes and the fixing holes corresponding to the waist holes.
Optionally, the second fixing assembly includes two second fixing plates;
the second fixing plate comprises a second module fixing plate and a second welding piece fixing plate, and the second module fixing plate and the second welding piece fixing plate are mutually perpendicular and integrally formed;
each second fixing plate is attached to a third side face of the battery module, and through holes corresponding to the other first connecting pieces are formed in the third side face;
one end of the rest of the first connecting pieces sequentially passes through the second fixing plate and each through hole.
Optionally, each of the first weldment fixing plates and each of the second weldment fixing plates are provided with a plurality of weldment fixing holes;
when the battery module is arranged on one side of the welding piece far away from the bottom wall, each first welding piece fixing plate and each second welding piece fixing plate are attached to the edge of the welding piece;
part of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole of the first welding piece fixing plate and the edge of the welding piece, and the other end of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole of the second welding piece fixing plate and the edge of the welding piece.
Optionally, the welding piece is a welding plate; the edge of the welding plate is provided with a plurality of placement holes; the number of the placement holes is the same as the number of the welding piece fixing holes;
the welding plate is welded to the bottom wall;
when the battery module is arranged on one side of the welding piece far away from the bottom wall, each welding piece fixing hole corresponds to each mounting hole;
part of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole and the corresponding placement hole of the first welding piece fixing plate, and the other end of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole and the corresponding placement hole of the second welding piece fixing plate.
Optionally, the first connector and the second connector are bolts.
Optionally, the battery pack of the pure electric passenger car further comprises a power supply cut-off device and a battery management device; the shell is provided with a slow charging interface, a positive electrode output interface, a negative electrode output interface and a communication interface;
the power supply cutting device is arranged in the accommodating groove and close to the second fixing assembly, the power supply cutting device is electrically connected with the battery module, the power supply cutting device is electrically connected with the slow charging interface, the battery module is electrically connected with the positive electrode output interface, and the battery module is electrically connected with the negative electrode output interface;
the battery management device is arranged in the accommodating groove and far away from the power supply cutting device, and is opposite to the power supply cutting device; the battery management device is electrically connected with the battery module, and the battery management device is electrically connected with the communication interface.
Optionally, the battery pack of the pure electric passenger car further comprises a safety device;
the safety device is arranged at the position, close to the power management device, of the containing groove, and is electrically connected with the battery module.
The embodiment of the invention also provides an electric vehicle, which comprises: the battery pack of the pure electric passenger car; wherein, pure electric passenger car battery package set up in the electric motor car.
According to the battery pack for the pure electric passenger car and the electric car, provided by the embodiment of the invention, the first fixing component is fixed with the plurality of fixing plates fixed on the periphery of the battery module through the part of the first connecting piece, so that the structural stability between the first fixing component and the battery module is improved, the second fixing component is fixed with the periphery of the battery module through the part of the first connecting piece, the structural stability between the second fixing component and the periphery of the battery module is improved, the pressure on a unit area is reduced, the first fixing component and the second fixing component are arranged on the welding piece, detachable connection is realized through the second connecting piece, and the structural stability of the battery module arranged in the shell is further improved on the whole.
Further, the first fixed component is provided with the waist hole, and the first connecting piece, the waist hole and the cooperation between the fixed sheet metal can realize the absorption to assembly tolerance, so that the phenomenon that the first connecting piece is not firm due to the existence of assembly tolerance when the first fixed component is fixed is avoided, and the structural stability of the battery module is improved.
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 structural diagram of a battery pack for a pure electric passenger car according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a housing and a welding member according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a first fixing component according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a second fixing component according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a fixing metal plate according to an embodiment of the present invention.
Fig. 6 is a partial schematic view of a battery module according to an embodiment of the invention.
Fig. 7 is a schematic diagram of a first view angle of a battery pack for a pure electric passenger car according to an embodiment of the invention.
Icon: 100-battery pack of pure electric passenger car; 1-a housing; 11-a receiving groove; 12-a bottom wall; 13-sidewalls; 2-a battery module; 24-fixing metal plates; 241-fixing holes; 3-a first securing assembly; 31-a first module fixing plate; 311-positioning holes; 312-waist holes; 32-a first weldment fixing plate; 4-a second securing assembly; 41-a second module fixing plate; 42-a second weldment fixing plate; 5-welding parts; 51-a placement hole; 6-a first connector; 7-a second connector; 8-a sealing ring; 91-battery management device; 92-power cut-off device; 93-a safety device; 941-slow charging interface; 942-positive output interface; 943-negative output interface; 944-communication interface.
Detailed Description
The power battery pack is an important component of the new energy electric vehicle, and the stable and reliable use of the power battery pack is directly related to the motor usability, the cruising ability, the safe running of the whole vehicle and the like of the new energy electric vehicle. The battery module is used as a core component of the power battery pack, and the structural stability of the battery module can influence the overall stability of the power battery pack.
It has been found that the fixing of most of the existing battery modules is performed by directly fixing the battery modules to the housing, which may result in the unstable fixing, and the inventor has studied and analyzed that the cause of the unstable fixing is mainly due to the assembly tolerance of each part in the battery pack, which is difficult to eliminate when connecting or fixing each part by using the connecting member, and may cause excessive extrusion or void at the connection, thereby resulting in unstable connection between the battery modules and the housing.
The above prior art solutions have all the drawbacks that the inventors have obtained after practice and careful study, and thus the discovery process of the above problems and the solutions presented below by the embodiments of the present invention for the above problems should be all contributions to the present invention by the inventors during the present invention.
Based on the above researches, the embodiment of the invention provides a battery pack of a pure electric passenger car and an electric car, which can improve the stability of a battery module and the battery pack during fixation, thereby improving the stability of the whole battery pack.
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 only 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, unless explicitly stated and limited otherwise, the terms "disposed," "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.
Fig. 1 shows a schematic structural diagram of a battery pack 100 for an electric vehicle according to an embodiment of the present invention, and as can be seen from the drawing, the battery pack 100 for an electric vehicle includes a housing 1, a battery module 2, a first fixing assembly 3, a second fixing assembly 4, a welding member, a sealing ring 8, an upper cover (not shown in fig. 1), a plurality of first connecting members 6, and a plurality of second connecting members (hidden by the housing 1, not shown in fig. 1).
The first fixing component 3 and the second fixing component 4 are respectively disposed on the battery module 2 and are matched with the first connecting pieces 6 and the second connecting pieces, so as to realize detachable connection between the battery module 2 and the first fixing component 3 and the second fixing component 4. Further, the welding piece sets up in the casing, and battery module 2 sets up in the position that the welding piece kept away from the casing, and sealing washer 8 sets up in the outer edge of casing 1, upper cover and casing 1 lock to realize the closure to the inside spare part of casing 1.
As can be seen from fig. 1, the first fixing member 3 and the second fixing member 4 provided around the battery module 2 play a role of being lifted up and down in the entire battery pack, for example, the first fixing member 3 and the second fixing member 4 are also detachably connected with the welding member through the second connecting member. So set up, when battery module 2 set up in the weldment, first fixed subassembly 3, second fixed subassembly 4 and weldment "surround" battery module, like this, can guarantee battery module 2 at the structural stability of a plurality of angles. It can be understood that the battery module 2 is fixedly connected to the fixing metal plates through a plurality of battery plates, and in order to better fix the battery module, the positions of the first fixing component 3 and the second fixing component 4 connected to the battery module 2 are selected according to the structure of the battery module 2.
In order to better illustrate the roles of the first fixing component 3 and the second fixing component 4, the embodiment of the present invention will be described with reference to fig. 2, which is a schematic structural diagram of a housing and a welding component provided in the embodiment of the present invention, it can be seen that the housing 1 includes a receiving slot 11 provided with an opening, the welding component 5 is adapted to the size of the receiving slot 11, and the welding component 5 is disposed in the receiving slot 11 and fixedly connected to the bottom wall 12 of the housing 1, wherein the welding component 5 is welded to the bottom wall 12. The side wall 13 is provided with a plurality of electrical interfaces for performing the electrical functions of the battery pack, which will be described later.
It will be appreciated that the welding member 5 is used for fixing the battery module, and is compared with directly fixing the battery module in the casing, add the welding member 5 and can improve the structural stability of whole battery package, for example, the welding member 5 can slow down the pressure between battery module and the casing, if do not set up the welding member 5, because the electric motor car can produce the shake in the operation in-process, can arouse the striking between battery module and the casing over time, on the other hand, in order to guarantee that other electrical components can set up in the casing, the inside structure of casing probably matches with the structure of battery module, set up the battery module in the casing by force this moment, probably arouse structural "incompatibility". The shape and size of the welding member 5 are adapted to the housing 1, and it is understood that the side of the welding member 5 away from the housing 1 is adapted to the structure of the battery module, the first fixing assembly, and the second fixing assembly.
With continued reference to fig. 2, the welding member 5 is provided with a plurality of mounting holes 51, the mounting holes 51 are configured to cooperate with the first fixing component and the second fixing component, one end of a portion of the second connecting member sequentially passes through the first fixing component and the corresponding mounting hole 51, and one end of the remaining second connecting member sequentially passes through the second fixing component and the corresponding mounting hole 51, so as to indirectly fix the battery module to the welding member 5 (the battery module is attached to the welding member 5, the first fixing component and the second fixing component are detachably connected with the battery module, and the first fixing component and the second fixing component are detachably connected with the welding member 5).
Fig. 3 shows a schematic structural diagram of a first fixing assembly 3 according to an embodiment of the present invention, where the first fixing assembly 3 includes two first fixing plates, the first fixing plates include a first module fixing plate 31 and a first welding member fixing plate 32, the first module fixing plate 31 and the first welding member fixing plate 32 are perpendicular to each other and are integrally formed, the first module fixing plate 31 is provided with a positioning hole 311 and a plurality of waist holes 312, the positioning hole 311 is used for positioning with a fixing metal plate provided on the battery module, and after positioning is accurate, each waist hole 312 is attached to other fixing metal plates on the battery module and connected by a part of the first connecting member. It will be appreciated that part of the first connectors comprises one pilot hole connector and a plurality of waist hole connectors, the number of waist hole connectors being the same as the number of waist holes. One end of each waist hole connecting piece sequentially penetrates through the positioning holes and the fixed metal plates, and one end of each waist hole connecting piece sequentially penetrates through the waist holes and the fixed metal plates.
It is worth noting that the waist hole is matched with the first connecting piece and the fixed metal plate, and assembly tolerance can be absorbed. For example, the transverse area of waist hole is greater than the fixed orifices that fixed panel beating set up, can guarantee that the fixed orifices is whole to be exposed in the waist hole, and the first connecting piece of being convenient for passes the fixed orifices entirely, so sets up, can improve the connection fastness between first fixed subassembly and the battery module.
With continued reference to fig. 3, the first weldment fixing plate 32 is provided with a plurality of weldment fixing holes 321, and the weldment fixing holes 321 are matched with the mounting holes 51 in fig. 2 and are fixedly connected through the second connecting piece.
Accordingly, fig. 4 shows a schematic structural diagram of a second fixing assembly according to an embodiment of the present invention, where the second fixing assembly 4 includes two second fixing plates, and the second fixing plates include a second module fixing plate 41 and a second welding member fixing plate 42, and since the connection manner and structure of the second module fixing plate 41 and the second welding member fixing plate 42 are similar to those of the first module fixing plate 31 and the first welding member fixing plate 32 in fig. 3, they will not be further described herein. It should be noted that, the two second fixing plates are attached to the third side of the battery module, the area of the third side of the battery module is larger, and accordingly, the contact area between the second fixing plates and the third side is also larger, it can be understood that the second module fixing plates 41 are fixed to the third side through the remaining first connecting members, and it can be understood that the third side is provided with through holes corresponding to the first connecting members.
Fig. 5 shows a schematic structural diagram of a fixing metal plate provided by the embodiment of the invention, and as can be seen from the figure, the fixing metal plate 24 is provided with a fixing hole 241, and the fixing hole 241 can be matched with the positioning hole and the waist hole, and the specific matching mode is shown in fig. 6. As can be seen from fig. 6, the first fixing plate and the second fixing plate are connected to the battery module, and then connected to the welding member 5 of fig. 2 through the second connecting member 7. On the premise of ensuring the structural stability of the whole battery pack, the material is effectively saved.
In this embodiment, the first and second connectors are bolts.
Further, referring to fig. 7, a schematic diagram of a first view angle of a battery pack for a pure electric vehicle according to an embodiment of the present invention is shown, and the battery pack for a pure electric vehicle further includes a battery management device 91, a power cut-off device 92 and a safety device 93, and a slow charging interface 941, a positive output interface 942, a negative output interface 943 and a communication interface 944 are provided on a side wall of the housing.
The power cut-off device 92 is disposed in the accommodating groove and near the second fixing component, the power cut-off device 92 is electrically connected with the battery module, the power cut-off device 92 is electrically connected with the slow charging interface 941, the battery module is electrically connected with the positive electrode output interface 942, and the battery module is electrically connected with the negative electrode output interface 943. The battery management device 91 is disposed in the accommodating groove at a position far away from the power cut-off device 92, the battery management device 91 is opposite to the power cut-off device 92, the battery management device 91 is electrically connected with the battery module, and the battery management device 91 is electrically connected with the communication interface 944. The safety device 93 is disposed at a position of the accommodating groove near the power management device 91, and the safety device 91 is electrically connected with the battery module. The battery tube device 91, the power cut-off device 92 and the safety device 93 can ensure safe and reliable operation of the battery pack, and can cut off the power supply of the battery in time when abnormal conditions occur.
Based on the above description, the embodiment of the invention also provides an electric vehicle, which comprises the battery pack of the pure electric passenger vehicle, wherein the battery pack of the pure electric passenger vehicle is arranged in the electric vehicle.
In summary, the battery pack for the pure electric passenger car and the electric car provided by the embodiment of the invention have strong structural stability, so that the reliable use of the whole battery pack is ensured.
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 (10)

1. A battery pack for a purely electric passenger vehicle, comprising: the battery module comprises a shell, a battery module, a first fixing assembly, a second fixing assembly, a welding piece, a sealing ring, an upper cover, a plurality of first connecting pieces and a plurality of second connecting pieces;
the shell comprises an accommodating groove with an opening, the welding piece is matched with the accommodating groove in size, and the welding piece is arranged in the accommodating groove and fixedly connected with the bottom wall of the shell;
the first fixing assembly corresponds to a plurality of fixing metal plates arranged on the periphery of the battery module, one end of part of the first connecting piece sequentially penetrates through the first fixing assembly and each fixing metal plate, and one end of the rest of the first connecting pieces sequentially penetrates through the second fixing assembly and one side face of the battery module; wherein the side surface is provided with through holes corresponding to the rest of the first connecting pieces;
the battery module is arranged on one side, far away from the bottom wall, of the welding piece, the part, far away from the periphery, of the first fixing component and the part, far away from the periphery, of the second fixing component are respectively corresponding to the edge of the welding piece, one end of part of the second connecting component sequentially penetrates through the edges of the first fixing component and the welding piece, and one end of the other second connecting components sequentially penetrates through the edges of the first fixing component and the welding piece;
the sealing ring is arranged at the edge of the opening, and the upper cover is buckled at the position, away from the opening, of the sealing ring.
2. The battery pack for a pure electric passenger car according to claim 1, wherein the battery module has a rectangular parallelepiped structure, and the first fixing assembly comprises two first fixing plates;
the two first fixing plates are respectively attached to a first side face and a second side face of the battery module, and the first side face is opposite to the second side face;
each first fixing plate corresponds to the fixing metal plate arranged on the first side face and the second side face, and one end of part of the first connecting piece sequentially penetrates through each first fixing plate and each fixing metal plate corresponding to each first fixing plate.
3. The battery pack for the pure electric passenger car according to claim 2, wherein the fixing sheet metal is provided with a fixing hole, the first fixing plate comprises a first module fixing plate and a first welding piece fixing plate, and the first module fixing plate and the first welding piece fixing plate are mutually perpendicular and integrally formed;
the first module fixing plate is provided with a positioning hole and a plurality of waist holes;
the first connecting piece comprises a positioning hole connecting piece and a plurality of waist hole connecting pieces, and the number of the waist hole connecting pieces is the same as that of the waist holes;
when each first module fixing plate is attached to each fixing metal plate corresponding to the first module fixing plate, each positioning hole and each waist hole are respectively corresponding to each fixing hole;
the positioning hole connecting pieces sequentially penetrate through the positioning holes and the fixing holes corresponding to the positioning holes, and the waist hole connecting pieces sequentially penetrate through the waist holes and the fixing holes corresponding to the waist holes.
4. The electric only vehicle battery pack of claim 3, wherein the second fixing assembly includes two second fixing plates;
the second fixing plate comprises a second module fixing plate and a second welding piece fixing plate, and the second module fixing plate and the second welding piece fixing plate are mutually perpendicular and integrally formed;
each second fixing plate is attached to a third side face of the battery module, and through holes corresponding to the other first connecting pieces are formed in the third side face;
one end of the rest of the first connecting pieces sequentially passes through the second fixing plate and each through hole.
5. The battery pack for a pure electric passenger car according to claim 4, wherein each of the first and second weldment fixing plates is provided with a plurality of weldment fixing holes;
when the battery module is arranged on one side of the welding piece far away from the bottom wall, each first welding piece fixing plate and each second welding piece fixing plate are attached to the edge of the welding piece;
part of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole of the first welding piece fixing plate and the edge of the welding piece, and the other end of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole of the second welding piece fixing plate and the edge of the welding piece.
6. The electric-only passenger car battery pack of claim 5, wherein the welding member is a welding plate; the edge of the welding plate is provided with a plurality of placement holes; the number of the placement holes is the same as the number of the welding piece fixing holes;
the welding plate is welded to the bottom wall;
when the battery module is arranged on one side of the welding piece far away from the bottom wall, each welding piece fixing hole corresponds to each mounting hole;
part of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole and the corresponding placement hole of the first welding piece fixing plate, and the other end of the second connecting piece is provided with one end which sequentially penetrates through each welding piece fixing hole and the corresponding placement hole of the second welding piece fixing plate.
7. The electric-only passenger car battery pack of claim 1, wherein the first and second connectors are bolts.
8. The electric-only passenger car battery pack according to claim 1, further comprising a power supply cutoff device and a battery management device; the shell is provided with a slow charging interface, a positive electrode output interface, a negative electrode output interface and a communication interface;
the power supply cutting device is arranged in the accommodating groove and close to the second fixing assembly, the power supply cutting device is electrically connected with the battery module, the power supply cutting device is electrically connected with the slow charging interface, the battery module is electrically connected with the positive electrode output interface, and the battery module is electrically connected with the negative electrode output interface;
the battery management device is arranged in the accommodating groove and far away from the power supply cutting device, and is opposite to the power supply cutting device; the battery management device is electrically connected with the battery module, and the battery management device is electrically connected with the communication interface.
9. The electric-only passenger car battery pack of claim 8, further comprising a safety device;
the safety device is arranged at the position, close to the power management device, of the containing groove, and is electrically connected with the battery module.
10. An electric vehicle, comprising: a battery pack for an electric vehicle according to any one of claims 1 to 9;
the battery pack of the pure electric passenger car is arranged in the electric car.
CN201810341577.7A 2018-04-16 2018-04-16 Battery pack of pure electric passenger car and electric car Active CN108336275B (en)

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JP2011103259A (en) * 2009-11-11 2011-05-26 Sanyo Electric Co Ltd Vehicular power unit and vehicle equipped with the same
CN103066225A (en) * 2013-01-24 2013-04-24 东风汽车公司 Power battery pack assembly structure of all-electric vehicle
CN104659308A (en) * 2015-03-12 2015-05-27 重庆长安汽车股份有限公司 Lower box body of battery pack
CN105501041A (en) * 2015-12-16 2016-04-20 安徽江淮汽车股份有限公司 Power battery housing assembly for electric automobile
WO2017117720A1 (en) * 2016-01-05 2017-07-13 宁德时代新能源科技股份有限公司 Battery module and battery pack
CN206332086U (en) * 2016-12-30 2017-07-14 芜湖天量电池系统有限公司 A kind of double-deck power battery box
CN206461009U (en) * 2017-02-21 2017-09-01 华霆（合肥）动力技术有限公司 Battery modules fixture and battery modules

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011103259A (en) * 2009-11-11 2011-05-26 Sanyo Electric Co Ltd Vehicular power unit and vehicle equipped with the same
CN103066225A (en) * 2013-01-24 2013-04-24 东风汽车公司 Power battery pack assembly structure of all-electric vehicle
CN104659308A (en) * 2015-03-12 2015-05-27 重庆长安汽车股份有限公司 Lower box body of battery pack
CN105501041A (en) * 2015-12-16 2016-04-20 安徽江淮汽车股份有限公司 Power battery housing assembly for electric automobile
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