CN108987633B - Automobile battery module structure - Google Patents
Automobile battery module structure Download PDFInfo
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- CN108987633B CN108987633B CN201810758669.5A CN201810758669A CN108987633B CN 108987633 B CN108987633 B CN 108987633B CN 201810758669 A CN201810758669 A CN 201810758669A CN 108987633 B CN108987633 B CN 108987633B
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- battery
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- shell base
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/597—Protection against reversal of polarity
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides an automobile battery module structure, comprising: top apron, middle part apron, shell base and shell clamp plate. A plurality of battery packs are vertically arranged in the shell base, and the inner side wall of the shell base is tightly attached to the side faces of the battery packs. The shell pressing plate surrounds the upper part of the shell base, so that the battery monomers in the shell base are pressed together, and the expansion space of the battery monomers is restrained. The middle cover plate is connected with the shell base in a clamped mode, so that the multiple groups of battery packs are fixed in the closed space of the middle cover plate and the shell base, and the wiring ends of the positive plate and the negative plate penetrate through the middle cover plate to isolate the battery monomer and connect the battery monomer with the wiring harness connected with the wiring ends. The top cover plate is clamped with the middle cover plate so that the connecting wire harness is sealed and insulated and isolated. The invention can prolong the service life of the battery module and reduce the potential safety hazard of the battery module.
Description
Technical Field
The invention relates to the technical field of automobile batteries, in particular to an automobile battery module structure.
Background
In recent years, electric vehicles have been rapidly developed in response to the influences of environmental pollution, rapid consumption of petroleum resources, and the like caused by rapid development of the automobile industry. The power battery is used as a core part of the electric automobile, and has direct influence on the driving range, the service life, the safety performance and the like of the whole automobile. In power battery at the use, because battery monomer can produce a large amount of chemical reaction heat and joule heat at the charge-discharge in-process, easily cause battery monomer to produce the inflation of different degrees, probably can make the battery module structure among the power battery produce the deformation, and then can't use, make the free life of battery reduce. Simultaneously, through connecting the pole piece to the free series-parallel connection of battery to the electricity that has realized whole battery module is connected, because it has the characteristics that electrically conductive and heat conductivility are high to connect the pole piece, connect the pole piece and probably can make the free heat accumulation of battery and produce when taking place external short circuit and catch fire. Therefore, how to protect the battery cells is a design key point of the battery module structure, which also requires that the battery module structure can effectively inhibit the expansion of the battery cells to cause damage and reduce the potential safety hazard of the battery cells caused by short circuit.
Disclosure of Invention
The invention provides an automobile battery module structure, which solves the problems that the existing battery module is easy to deform and cannot be used when a battery monomer expands and is easy to be heated and ignited when short circuit occurs outside, can prolong the service life of the battery module and reduce the potential safety hazard of the battery module.
In order to achieve the above purpose, the invention provides the following technical scheme:
an automotive battery module structure, comprising: the battery comprises a battery monomer, a positive plate and a negative plate; the battery pack is characterized in that a plurality of battery monomers are stacked to form a battery pack, the top ends of the battery monomers are provided with a positive electrode top cover and a negative electrode top cover, a positive electrode plate is connected with the positive electrode top covers of the battery monomers, the battery pack converges the positive electrodes of the battery monomers through the positive electrode plate, a negative electrode plate is connected with the negative electrode top covers of the battery monomers, and the battery pack converges the negative electrodes of the battery monomers through the negative electrode plate; should still include: the top cover plate, the middle cover plate, the shell base and the shell pressing plate are arranged on the shell;
the battery packs are vertically arranged in the shell base, and the inner side wall of the shell base is tightly attached to the side faces of the battery packs;
the shell pressing plate surrounds the upper part of the shell base so that the battery monomers in the shell base are pressed together, and the expansion space of the battery monomers is restrained;
the middle cover plate is clamped with the shell base, so that a plurality of groups of battery packs are fixed in a closed space between the middle cover plate and the shell base; the wiring terminals of the positive plate and the negative plate penetrate through the middle cover plate so as to isolate a battery monomer from a connection wiring harness connected to the wiring terminals;
the top cover plate is clamped with the middle cover plate so that the connecting wire harness is sealed and insulated and isolated.
Preferably, the housing base is of a frame-shaped structure, the side face of the housing base is of a hollow structure, and the housing base is made of high polymer materials through injection molding.
Preferably, the housing base includes: a first separator and a second separator;
the plurality of first partitions vertically partition the internal installation space of the case base, and the plurality of second partitions laterally partition the internal installation space of the case base, so that the internal installation space of the case base is partitioned into a plurality of lattice-like spaces, each of which mounts one of the battery packs.
Preferably, the housing base further comprises: a pull rod support;
and a plurality of pull rod supports are symmetrically arranged on two side surfaces of the shell base, and the shell base is connected with a pull rod penetrating through the middle cover plate and the shell pressing plate through the pull rod supports.
Preferably, the middle cover plate is provided with a wire harness groove, a rectangular through hole and a clamping and fixing structure;
the wire harness groove is used for limiting the trend of the connecting wire harness;
the middle cover plate is clamped with the shell base through the clamping fixing structure;
the wiring ends of the positive plate and the negative plate penetrate through the middle cover plate through the rectangular through holes, so that the wiring ends are exposed outside and are connected with the connecting wire harness.
Preferably, lugs are arranged on two sides of the middle cover plate, through holes are formed in the lugs, and the pull rod penetrates through the through holes to be connected with the pull rod support.
Preferably, the shell pressing plate is of a door-shaped structure, a reinforcing plate is arranged at the joint of the top and the side of the shell pressing plate, reinforcing ribs are arranged at the top, and the side is of a folded edge structure;
the side portion includes: a bottom plate, a first folded edge and a second folded edge; the first folding edge and the second folding edge are respectively vertically arranged on two sides of the bottom plate, connecting holes and fixing holes are symmetrically formed in the first folding edge and the second folding edge, and the pull rod penetrates through the side part through the connecting holes, so that the shell pressing plate and the shell base are tightened through the pull rod.
Preferably, the negative pole piece is provided with a first avoidance structure, and the first avoidance structure comprises: a plurality of symmetrically arranged semicircular bulges; when the negative pole piece is contacted with the negative pole top cover of the battery monomer, the semicircular bulge enables the negative pole piece to be avoided from being contacted with the pole of the battery monomer.
Preferably, the positive plate is formed by welding and compounding a copper plate layer and a nickel plate layer, the nickel plate layer is arranged on the bottom surface, and the copper plate layer is arranged on the top surface;
the positive plate is equipped with the second and dodges the structure, the second dodges the structure and includes: a nickel tongue piece and a waist-shaped protrusion;
the copper pole sheet layer in the middle of the waist-shaped bulge is a square through hole, and the nickel pole sheet layer in the middle of the waist-shaped bulge is a nickel tongue piece; the waist-shaped bulge is used for enabling the positive plate to be kept away from contact with the pole of the single battery and enabling the nickel tongue piece to be in contact with the positive top cover of the single battery;
the nickel tongue piece with the junction of nickel utmost point lamella is the fusing structure when the outside short circuit that takes place of battery monomer makes the temperature of nickel tongue piece exceed certain temperature threshold, the nickel tongue piece breaks off the electric connection of nickel utmost point lamella and the free anodal top cap of battery through the fusing structure.
Preferably, the battery pack is formed by stacking four battery monomers, positive end caps of the four battery monomers are connected in series through the positive electrode plates, and negative end caps of the four battery monomers are connected in series through the negative electrode plates, so that the four battery monomers are connected in parallel;
the four battery monomers are wrapped together by the elastic insulating layer, and when the battery pack is installed in the shell base, the elastic insulating layer is used for insulating and protecting the battery pack and reducing assembly tolerance.
The invention provides an automobile battery module structure, wherein a battery monomer is fixedly arranged in a shell base, and the side edge of the shell base is extruded and limited through a shell pressing plate, so that the expansion space of the battery monomer generated in the normal charge-discharge cycle process is limited, the problem that the existing battery module is easy to deform and cannot be used when the battery monomer expands is solved, the electric connection of the battery monomer is disconnected through a fusing structure of a positive plate when a short circuit occurs outside, the problem of fire caused by the short circuit is avoided, the service life of the battery module can be prolonged, and the potential safety hazard of the battery module is reduced.
Drawings
In order to more clearly describe the specific embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below.
FIG. 1: is the schematic diagram of the structure of the automobile battery module provided by the invention;
FIG. 2: is a structural schematic diagram of the housing base provided by the invention;
FIG. 3: is a top surface structure schematic diagram of the middle cover plate provided by the invention;
FIG. 4: is a bottom structure schematic diagram of the middle cover plate provided by the invention;
FIG. 5: is a structural schematic diagram of the shell pressing plate provided by the invention;
FIG. 6: is a schematic diagram of the negative plate provided by the invention;
FIG. 7: is a schematic diagram of the positive plate provided by the invention;
FIG. 8: is a schematic diagram of a battery pack provided by the present invention;
FIG. 9: is a schematic diagram of a battery cell provided by the invention
FIG. 10: is a schematic structural diagram of the top cover plate provided by the invention.
Reference numerals
1 outer shell base
2 outer shell pressing plate
3 middle cover plate
4 Top cover plate
11 first partition plate
12 second partition
13 draw bar support
21 top of the shell press plate
22 side of the housing pressure plate
23 reinforcing plate
221 first folding edge
222 second hem
223 baseplate
31 wire harness slot
32 rectangular through hole
33 convex limiting structure
34 clamping and fixing structure
35 spacing baffle
41 Small round hole
5 negative plate
51 first avoidance structure
6 positive plate
61 second avoidance structure
62 Nickel tongue
63 fusing structure
7 elastic insulating layer
81 pole
82 positive electrode top cover
83 negative pole top cap
Detailed Description
In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.
The structure to current power battery can not effectively restrain when the battery monomer inflation and warp, simultaneously, easily causes the potential safety hazard that the battery monomer catches fire when externally taking place the short circuit. The invention provides an automobile battery module structure, wherein a battery monomer is fixedly arranged in a shell base, and the side edge of the shell base is extruded and limited through a shell pressing plate, so that the expansion space of the battery monomer generated in the normal charge-discharge cycle process is limited, the problem that the existing battery module is easy to deform and cannot be used when the battery monomer expands is solved, and the electric connection of the battery monomer is disconnected through a fusing structure of a positive plate when a short circuit occurs outside, so that the problem of fire caused by the short circuit is avoided. The service life of the battery module can be prolonged, and the potential safety hazard of the battery module is reduced.
As shown in fig. 1, 7 and 8, an automotive battery module structure includes: the battery comprises a battery monomer, a positive plate 6 and a negative plate 5; a plurality of battery monomer pile up in order forming the group battery, the free top of battery is equipped with anodal top cap 82 and negative pole top cap 83, and positive plate 6 links to each other with the free anodal top cap 82 of a plurality of batteries, the group battery converges a plurality of free anodal of battery through positive plate 6, and negative pole piece 5 links to each other with the free negative pole top cap 83 of a plurality of batteries, the group battery converges a plurality of free negative poles of battery through negative plate 5.
The structure further includes: top cover plate 4, middle cover plate 3, housing base 1 and housing pressure plate 2. A plurality of battery packs are vertically arranged in the shell base 1, and the inner side wall of the shell base 1 is tightly attached to the side faces of the battery packs. The shell pressing plate 2 surrounds the upper part of the shell base so that the battery monomers in the shell base 1 are pressed together, and the expansion space of the battery monomers is restrained. The middle cover plate 3 is clamped with the shell base 1, so that a plurality of groups of battery packs are fixed in a closed space between the middle cover plate 3 and the shell base 1; the wiring terminals of the positive plate 6 and the negative plate 5 penetrate through the middle cover plate 3 to isolate the battery cells from the connection wiring harness connected to the wiring terminals. The top cover plate 4 is clamped with the middle cover plate 5, so that the connecting wire harness is sealed and insulated.
Specifically, set up the shell clamp plate on the upper portion of shell base, this shell clamp plate installs both sides and the upper portion at the shell base through the fixed mode of 4 pull rods in one side, be equipped with the block rubber simultaneously between the inboard of shell base and shell clamp plate, this block rubber has high resilience and fire resistance, can carry out tight pressfitting with the both sides of battery module (the free direction of expansion of battery) through the effect of block rubber again when the shell clamp plate is fixed through each 4 pull rods in both sides, and then guarantee that the inflation of battery monomer in full life cycle obtains effectual restraint and control.
As shown in fig. 2, the housing base 1 is a frame-shaped structure, the side surface of the housing base 1 is a hollow structure, and the housing base 1 is made of a polymer material by injection molding. Further, the housing base 1 includes: a first partition plate 11 and a second partition plate 12; the plurality of first partitions 11 vertically partition the internal installation space of the housing base 1, and the plurality of second partitions 12 laterally partition the internal installation space of the housing base so that the internal installation space of the housing base 1 is partitioned into a plurality of lattice-like spaces, each of which mounts one of the battery packs. Still further, the housing base 1 further includes: a tie rod support 13; the shell base 1 is characterized in that a plurality of pull rod supports 13 are symmetrically arranged on two side faces of the shell base 1, and the shell base 1 is connected with a pull rod penetrating through the middle cover plate 3 and the shell pressing plate 2 through the pull rod supports 13.
In practical application, the housing base is formed by injection molding of a high polymer material, and has high insulation, flame retardance and good strength and toughness. The inside many places of shell base are equipped with first baffle and second baffle, and its effect is the effect that separates the shelves to the group battery of different groups in the battery module on the one hand, and on the other hand is the effect that is used for strengthening drain pan structural strength. And a plurality of positions of the shell base are provided with criss-cross reinforcing rib structures with delta shapes, particularly at the stress concentration positions of the fixing structures, so that the structural strength of the shell base is ensured. Meanwhile, a plurality of positions of the bottom shell structure are provided with lightening holes in different shapes, so that the light-weight structural design is realized to the maximum degree.
As shown in fig. 3 and 4, the middle cover plate 3 is provided with a cable slot 31, a rectangular through hole 32, a protrusion limiting structure 33 and a clamping fixing structure 34. The harness slot 31 is used to define the running direction of the connecting harness. The protruding limiting structure 33 is used for fixing the connecting wire harness in the wire harness groove 31 and is usually arranged on the side wall of the top of the wire harness groove. The middle cover plate 3 is clamped with the shell base 1 through the clamping fixing structure 34. The middle cover plate 3 further includes: the limiting partition plate 35 is used for limiting the installation position of the battery monomers, so that the multiple groups of battery monomers are tightly attached to the middle cover plate. The wiring ends of the positive plate and the negative plate penetrate through the middle cover plate 3 through the rectangular through hole 32, so that the wiring ends are exposed outside and are connected with the connecting wire harness. Furthermore, lugs are arranged on two sides of the middle cover plate and provided with through holes, and the pull rod is connected with the pull rod support through the through holes.
Specifically, the pencil groove on the middle part apron includes sampling pencil fuse fixed slot and sampling pencil fixed slot, and the end of sampling pencil fuse is equipped with the copper terminal, and when fixed, the wiring end of copper terminal and pole piece passes through the bolt to be fixed together on the nut of moulding plastics of middle part apron, and the sampling pencil is then fixed in the middle part apron through the pencil groove. This middle part apron is formed by macromolecular material injection molding, has high insulating nature, fire resistance and good intensity and toughness, the fixed action that can play the high-voltage electricity of fixed battery module and sample pencil can play again and carry out fine insulating action to the battery monomer, it has sufficient structural strength again simultaneously and guarantees that all battery monomers installed in the drain pan can not follow Y to carrying out the drunkenness, and then has guaranteed that battery module electricity is connected and sampling signal's reliability. The upper and lower end of middle part apron structure respectively is equipped with 3 joint fixed knot and constructs, and this joint fixed knot constructs and the cooperation of the joint fixed orifices on the drain pan, and tight joint assembly is in the same place, and this joint fixed knot constructs simply, and is fixed reliable, and bolted connection has occupation space little, can not lead to the risk that the module electricity connects the emergence outer short circuit because of bolt assembly carelessly.
In practical application, all positive and negative pole pieces are vertically placed upwards before the middle cover plate is not installed, the design mode can facilitate the assembly of the middle cover plate, when the assembly of the middle cover plate is completed, the wiring terminals of all positive and negative pole pieces can be turned over by 90 degrees and pressed on the middle cover plate through the effect of the pole piece crimping tool, and the ingenious design of the positive and negative pole pieces greatly saves the manufacturing cost and realizes the easy assembly of the middle cover plate.
As shown in fig. 5, the shell pressing plate is of a door-shaped structure, a reinforcing member 23 is arranged at the joint of the top 21 and the side 22 of the shell pressing plate, the top 21 is provided with a reinforcing rib, and the side 22 is of a folded edge structure. The side portion 22 includes: a bottom plate 223, a first folded edge 221 and a second folded edge 222; the two sides of the bottom plate 223 are respectively and vertically provided with a first folding edge 221 and a second folding edge 222, the first folding edge 221 and the second folding edge 222 are symmetrically provided with a connecting hole and a fixing hole, and the pull rod penetrates through the connecting hole and the side part, so that the shell pressing plate and the shell base are tensioned through the pull rod.
Specifically, the material of this shell clamp plate is high strength steel material, for realizing the lightweight design, structurally the maximize be equipped with the lightening hole, simultaneously in order to guarantee the intensity of clamp plate, all design reinforced structure in the department of bending of its top and lateral part to prevent to lead to the fracture because the stress concentration that outside atress produced. In order to guarantee the restraint of the battery module on the Z direction, a reinforcing rib structure is arranged at the top of the pressing plate, and the fixing strength of the battery module on the Z direction can be guaranteed through the structure. The two sides of the upper pressing plate are designed to be U-shaped, and the design can have enough structural strength on the basis of light weight design to ensure that the expansion of the battery monomer in the battery module in the whole life cycle is effectively restrained and controlled. The flanging structures with the flanging holes are designed at a plurality of positions on the two side parts of the shell pressing plate, and the structures can be used for installing and fixing the low-voltage connector.
As shown in fig. 6 and 9, the negative electrode sheet 5 is provided with a first avoidance structure 51, and the first avoidance structure 51 includes: a plurality of symmetrically arranged semicircular bulges; when the negative electrode sheet 5 is in contact with the single negative electrode top cover 83 of the battery, the semicircular bulge enables the negative electrode sheet 5 to be in contact with the single pole 81 of the battery in a avoiding mode.
Specifically, the negative electrode plate is made of a copper material, and the welding of the negative electrode plate and the top cover of the battery cell can be laser welding or resistance welding. The upper surface of negative pole piece is equipped with first structure of dodging, and this structure is used for dodging the bellied utmost point post of battery monomer, and this arch is dodged the structure and can be played the effect of location toward the in-process that the battery monomer was placed at the negative pole piece again simultaneously, ensures that the negative pole piece realizes the accurate positioning of X and Z direction after placing the battery monomer to guarantee that the welded in-process can not weld partially.
As shown in fig. 7 and 9, the positive electrode sheet 6 is formed by welding and compounding a copper electrode sheet layer and a nickel electrode sheet layer, wherein the nickel electrode sheet layer is arranged on the bottom surface, and the copper electrode sheet layer is arranged on the top surface. Positive plate 6 is equipped with the second and dodges structure 61, and the second dodges structure 61 includes: a nickel tab 62 and a kidney-shaped protrusion. The copper pole sheet layer in the middle of the waist-shaped bulge is a square through hole, and the nickel pole sheet layer in the middle of the waist-shaped bulge is a nickel tongue piece 62; the waist-shaped protrusion is used for enabling the positive plate 6 to be in contact with the single battery pole 81 in a avoiding mode, and enabling the nickel tongue piece 62 to be in contact with the single battery positive pole top cover 82. The nickel tongue piece 62 with the junction of nickel electrode lamella is fusing structure 63 when the outside short circuit that takes place of battery cell makes the temperature of nickel tongue piece exceed certain temperature threshold, nickel tongue piece 62 breaks the electric connection of nickel electrode lamella and battery cell's positive pole top cap 82 through fusing structure 63.
Specifically, the positive plate is formed by welding and compounding a copper plate and a nickel plate, the copper plate is above the nickel plate, and the nickel plate is below the copper plate, and the welding mode of the copper plate and the nickel plate can be laser welding or resistance welding. The upper surface design of positive plate has the second to dodge the structure, and this structure is used for dodging the bellied utmost point post of battery monomer, and this arch is dodged the structure and can be played the effect of location toward the in-process that the battery monomer was placed at the pole piece again simultaneously, ensures that the pole piece realizes the accurate positioning of X and Z direction after placing the battery monomer to guarantee that the welded in-process can not weld partially. In order to prevent the battery module from generating fire due to heat accumulation in the process of generating external short circuit, the fusing structure is arranged at the connection position of the nickel tongue piece, the fusing structure can be set into the connection structure with the narrowest width, and when the battery module generates the external short circuit, the fusing position (with the narrowest width) of the nickel tongue piece can be automatically fused within 1 second, so that the further occurrence of the external short circuit of the battery module is prevented. The fusing department at nickel tongue piece rear portion designs for the hunch-up structure, and this design mainly is to avoid the nickel tongue piece to produce stress concentration after with the welding of battery monomer top cap, prevents that this is in the in-process that the whole car went to break because of the vibration, and then influences the electric connection reliability of whole battery package.
As shown in fig. 8, the battery pack is formed by stacking four battery cells, wherein positive caps of the four battery cells are connected in series through positive plates 6, and negative caps of the four battery cells are connected in series through negative plates 5, so that the four battery cells are connected in parallel. The four battery cells are wrapped together by the elastic insulating layer 7, and when the battery pack is installed in the shell base, the elastic insulating layer 7 is used for insulating and protecting the battery pack and reducing assembly tolerance.
Specifically, every four battery monomers are tightly attached together and welded into 1 4P battery pack through a positive plate and a negative plate, and meanwhile, an elastic insulating layer is adhered to the outer portion of the 4P battery pack and used for ensuring that the expansion surface side of each battery monomer can be tightly pressed and attached to the inner wall of the bottom shell after the 4P battery pack is installed on the shell base. The elastic insulating layer is made of high-molecular flame-retardant materials, has good resilience, and can play a role in absorbing tolerance in the assembling process. Meanwhile, the positive plate and the negative plate are welded with the battery monomer top cover through laser welding or resistance welding, and the welding spot tension value is over 100N through welding spot tension test after welding; and after the pole piece is separated from the battery monomer, the area of the welding spot remained on the top cover of the battery monomer by the pole piece is over 75 percent, and the quality of the welding spot fully meets the test requirement of welding reliability.
As shown in fig. 10, the top cover plate is made of a polymer material by injection molding, has high insulation and flame retardancy, and good strength and toughness, and mainly plays a role in insulating and protecting the electrical connection and the connection harness in the middle cover plate. The top apron can adopt the components of a whole that can function independently structure, and the accessible respectively is equipped with 2 can get rid of flip structures (thereby make things convenient for flip to get rid of through the clearance structure of design discontinuous) at upper and lower both ends face to when the high pressure copper bar of battery module or low pressure pencil need be drawn forth from the module, only need with the flip of corresponding position get rid of can, thereby the maximize realize the commonality of different battery module top apron. Meanwhile, a plurality of small round holes 41 with phi 3 are designed in the top cover plate structure, so that the lightweight structural design is realized to the maximum extent.
Therefore, the invention provides an automobile battery module structure, wherein a battery monomer is fixedly arranged in a shell base, and the side edge of the shell base is limited by extruding a shell pressing plate, so that the expansion space of the battery monomer generated in the normal charge-discharge cycle process is limited, the problem that the existing battery module is easy to deform and cannot be used when the battery monomer expands is solved, the electric connection of the battery monomer is disconnected through a fusing structure of a positive plate when a short circuit occurs outside, the problem of fire caused by the short circuit is avoided, the service life of the battery module can be prolonged, and the potential safety hazard of the battery module is reduced.
The construction, features and functions of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings, and all equivalent embodiments modified or modified by the spirit and scope of the present invention should be protected without departing from the spirit of the present invention.
Claims (8)
1. An automotive battery module structure, comprising: the battery comprises a battery monomer, a positive plate and a negative plate; the battery pack is characterized in that a plurality of battery monomers are stacked to form a battery pack, the top ends of the battery monomers are provided with a positive electrode top cover and a negative electrode top cover, a positive electrode plate is connected with the positive electrode top covers of the battery monomers, the battery pack converges the positive electrodes of the battery monomers through the positive electrode plate, a negative electrode plate is connected with the negative electrode top covers of the battery monomers, and the battery pack converges the negative electrodes of the battery monomers through the negative electrode plate; it is characterized by also comprising: the top cover plate, the middle cover plate, the shell base and the shell pressing plate are arranged on the shell;
the battery packs are vertically arranged in the shell base, and the inner side wall of the shell base is tightly attached to the side faces of the battery packs;
the shell pressing plate surrounds the upper part of the shell base so that the battery monomers in the shell base are pressed together, and the expansion space of the battery monomers is restrained;
the middle cover plate is clamped with the shell base, so that a plurality of groups of battery packs are fixed in a closed space between the middle cover plate and the shell base; the wiring terminals of the positive plate and the negative plate penetrate through the middle cover plate so as to isolate a battery monomer from a connection wiring harness connected to the wiring terminals;
the top cover plate is clamped with the middle cover plate so that the connecting wire harness is sealed and insulated;
the negative pole piece is equipped with first structure of dodging, first structure of dodging includes: a plurality of symmetrically arranged semicircular bulges; when the negative pole piece is contacted with the negative pole top cover of the battery monomer, the semicircular bulge enables the negative pole piece to be kept away from contact with the pole of the battery monomer;
the positive plate is formed by welding and compounding a copper plate layer and a nickel plate layer, wherein the nickel plate layer is arranged on the bottom surface, and the copper plate layer is arranged on the top surface;
the positive plate is equipped with the second and dodges the structure, the second dodges the structure and includes: a nickel tongue piece and a waist-shaped protrusion;
the copper pole sheet layer in the middle of the waist-shaped bulge is a square through hole, and the nickel pole sheet layer in the middle of the waist-shaped bulge is a nickel tongue piece; the waist-shaped bulge is used for enabling the positive plate to be kept away from contact with the pole of the single battery and enabling the nickel tongue piece to be in contact with the positive top cover of the single battery;
the nickel tongue piece with the junction of nickel utmost point lamella is the fusing structure when the outside short circuit that takes place of battery monomer makes the temperature of nickel tongue piece exceed certain temperature threshold, the nickel tongue piece breaks off the electric connection of nickel utmost point lamella and the free anodal top cap of battery through the fusing structure.
2. The automobile battery module structure according to claim 1, wherein the housing base is a frame-shaped structure, the side surface of the housing base is a hollow structure, and the housing base is made of a polymer material through injection molding.
3. The automotive battery module structure of claim 2, wherein the housing base comprises: a first separator and a second separator;
the plurality of first partitions vertically partition the internal installation space of the case base, and the plurality of second partitions laterally partition the internal installation space of the case base, so that the internal installation space of the case base is partitioned into a plurality of lattice-like spaces, each of which mounts one of the battery packs.
4. The automotive battery module structure of claim 3, wherein the housing base further comprises: a pull rod support;
and a plurality of pull rod supports are symmetrically arranged on two side surfaces of the shell base, and the shell base is connected with a pull rod penetrating through the middle cover plate and the shell pressing plate through the pull rod supports.
5. The automobile battery module structure according to claim 4, wherein the middle cover plate is provided with a wire harness groove, a rectangular through hole and a clamping and fixing structure;
the wire harness groove is used for limiting the trend of the connecting wire harness;
the middle cover plate is clamped with the shell base through the clamping fixing structure; the wiring ends of the positive plate and the negative plate penetrate through the middle cover plate through the rectangular through holes, so that the wiring ends are exposed outside and are connected with the connecting wire harness.
6. The vehicle battery module structure as claimed in claim 5, wherein the middle cover plate is provided with lugs at both sides thereof, the lugs are provided with through holes, and the tie bars are connected with the tie bar holders through the through holes.
7. The automobile battery module structure according to claim 6, wherein the housing pressing plate is of a door-shaped structure, a reinforcing plate is arranged at the joint of the top and the side of the housing pressing plate, the top is provided with reinforcing ribs, and the side is of a folded edge structure;
the side portion includes: a bottom plate, a first folded edge and a second folded edge; the first folding edge and the second folding edge are respectively vertically arranged on two sides of the bottom plate, connecting holes and fixing holes are symmetrically formed in the first folding edge and the second folding edge, and the pull rod penetrates through the side part through the connecting holes, so that the shell pressing plate and the shell base are tightened through the pull rod.
8. The automobile battery module structure according to claim 1, wherein the battery pack is formed by stacking four battery cells, positive caps of the four battery cells are connected in series through the positive plates, and negative caps of the four battery cells are connected in series through the negative plates, so that the four battery cells are connected in parallel;
the four battery monomers are wrapped together by the elastic insulating layer, and when the battery pack is installed in the shell base, the elastic insulating layer is used for insulating and protecting the battery pack and reducing assembly tolerance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810758669.5A CN108987633B (en) | 2018-07-11 | 2018-07-11 | Automobile battery module structure |
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|---|---|---|---|
| CN201810758669.5A CN108987633B (en) | 2018-07-11 | 2018-07-11 | Automobile battery module structure |
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| CN108987633A CN108987633A (en) | 2018-12-11 |
| CN108987633B true CN108987633B (en) | 2020-09-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109873104B (en) * | 2018-12-13 | 2024-04-16 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN111422025A (en) * | 2020-02-29 | 2020-07-17 | 华南理工大学 | Pure electric vehicles double evaporation ware heat pump air conditioning system |
| CN111354899B (en) * | 2020-05-25 | 2020-10-23 | 比亚迪股份有限公司 | Battery pack, battery module, vehicle and energy storage device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101944957B1 (en) * | 2015-07-20 | 2019-02-01 | 주식회사 엘지화학 | Battery pack and vehicle comprising the same |
| CN206422164U (en) * | 2016-12-19 | 2017-08-18 | 河北银隆新能源有限公司 | A kind of clad type battery module structure |
| CN206711955U (en) * | 2017-02-28 | 2017-12-05 | 长城汽车股份有限公司 | Battery modules, electrokinetic cell bag and vehicle |
| CN206742362U (en) * | 2017-06-01 | 2017-12-12 | 东莞市沃泰通新能源有限公司 | A kind of battery modules |
| CN207517750U (en) * | 2017-09-09 | 2018-06-19 | 深圳市沃特玛电池有限公司 | A kind of battery modules |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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