CN217214887U - Battery module - Google Patents

Abstract

The utility model provides a battery module, battery module includes the core subassembly, the core subassembly is located the inside of U-shaped module end shell, the relative both ends of core subassembly are provided with first module end subassembly and second module end subassembly, the top of core subassembly is provided with the module upper cover, the core subassembly is located the U-shaped module end shell, first module end subassembly, second module end subassembly and the module upper cover enclose the space; the utility model discloses a module, including the battery cell subassembly, U-shaped module drain pan, battery cell subassembly with it has heat-conducting glue to fill between the bottom surface of U-shaped module drain pan, the module upper cover includes the lid, the lid is close to a side surface of battery cell subassembly is provided with the bolster, the bolster with be provided with FPC pencil between the battery cell subassembly. The utility model provides a battery module can possess higher energy density, good stability and excellent heat dispersion simultaneously, has reached the effect of taking into account each item performance.

Description

Battery module

Technical Field

The utility model belongs to the technical field of the battery manufacture, especially, relate to a battery module.

Background

Along with the development of new energy industry, electric automobile's application is more and more extensive, and the power battery module group as electric automobile energy system core needs to have higher energy density, good stability and excellent heat dispersion simultaneously, just can satisfy people to the requirement of electric automobile continuation of the journey mileage and fail safe nature.

However, in the current battery module structural design, the battery cells are usually fixed by using a plastic frame, and heat is dissipated by using a heat-conducting metal plate or a stamping liquid cooling plate between the battery cells, so that a heat dissipation path is increased by using the heat dissipation method; meanwhile, the heat-conducting metal plate or the stamping liquid cooling plate is added between the battery cores, so that the weight of the module is increased, the energy density of the battery module is reduced, and the heat-conducting metal plate/the stamping liquid cooling plate and the bottom shell of the module can not be attached seamlessly due to the existence of machining tolerance, so that heat resistance is generated to influence the heat transmission of the battery cores. In addition, the wire harness for collecting voltage and temperature in the common battery module has a complex structure, occupies a large space, has a low space utilization rate, and causes the volume energy density of the battery pack to be reduced; and electric core is at charge-discharge and circulation in-process, and thickness can change, and general battery module considers less to electric core size change to cause battery module stability relatively poor.

Therefore, it is highly desirable to design a battery module having high energy density, good stability and excellent heat dissipation performance to satisfy the requirements of people on the endurance mileage and the safety and reliability of the electric vehicle.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a battery module, which has higher energy density, good stability and excellent heat dissipation performance through the interaction between the heat-conducting glue, the buffer part and the FPC wiring harness; and not only can offset the volume change of electric core subassembly in the charge-discharge process through the bolster, can also offset the difference in height that the FPC pencil leads to. Therefore, the utility model provides a battery module has reached the effect of taking into account each item performance.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a battery module, battery module includes the core subassembly, the core subassembly is located the inside of U-shaped module end shell, the both ends that the core subassembly is relative are provided with first module end subassembly and second module end subassembly, the top of core subassembly is provided with the module upper cover, the core subassembly is located U-shaped module end shell first module end subassembly second module end subassembly with in the space that the module upper cover encloses.

The utility model discloses a module, including U-shaped module drain pan, lid, battery core subassembly, lid upper cover, bolster and FPC pencil, the battery core subassembly with it has the heat-conducting glue to fill between the bottom surface of U-shaped module drain pan, the module upper cover includes the lid, the lid is close to a side surface of battery core subassembly is provided with the bolster, the bolster with be provided with the FPC pencil between the battery core subassembly.

As a preferred technical scheme of the utility model, the U-shaped module chassis include the U-shaped casing and set up in the insulating layer of the internal surface of U-shaped casing, the uncovered both ends that the U-shaped casing is relative all are provided with the fender adhesive tape, keep off the adhesive tape with the lateral wall of U-shaped casing is in the bottom surface of U-shaped casing encloses into the rectangle frame, heat-conducting glue fill in the rectangle frame.

As a preferred technical scheme of the utility model, the symmetry is provided with the discernment position on the lateral wall surface of U-shaped casing, the discernment position is close to the bottom of U-shaped casing, and be close to keep off the adhesive tape setting, the discernment position is regarded as U-shaped module bottom shell respectively with first module end subassembly with the welding identification point of second module end subassembly.

As a preferred technical scheme, the lateral wall top of U-shaped casing is provided with spacing post, the lid seted up with spacing post assorted spacing hole, through spacing post with spacing hole will the module upper cover install in on the U-shaped module drain pan.

As a preferred technical solution of the present invention, the limiting holes are symmetrically arranged on both sides of the cover body, and each limiting hole corresponds to one limiting column;

and a positive pole mark and a negative pole mark are arranged on the surface of one side of the cover body, which is far away from the buffer piece.

As an optimal technical scheme of the utility model, the FPC pencil includes FPC winding displacement, nickel piece, low pressure connector and temperature sensing component, the inside of FPC winding displacement is pressed there is the circuit, the voltage signal that the nickel piece was gathered with the temperature signal that the temperature sensing component gathered all passes through circuit transmission in the FPC winding displacement extremely low pressure connector.

As a preferred aspect of the present invention, the first module end assembly includes a first insulator and a first end cap, and the second module end assembly includes a second insulator and a second end cap.

The first insulating part with the second insulating part set up respectively in the relative both ends of electricity core subassembly, first end cover member is located first insulating part is kept away from one side of electricity core subassembly, the second end cover member is located the second insulating part is kept away from one side of electricity core subassembly, U-shaped module drain pan first end cover member the second end cover member with the module upper cover encloses into and holds the airtight space of electricity core subassembly.

As an optimized technical scheme of the utility model, first end cap spare with all be provided with the through-hole on the second end cap spare, the through-hole is as fixed orifices or hole for hoist.

As a preferred technical solution of the present invention, the first end cap and the second end cap each include a top cap and an end cap, the top cap of the first end cap is disposed between the first insulating member and the end cap of the end cap, and the top cap of the second end cap is disposed between the second insulating member and the end cap of the end cap.

As an optimal technical scheme of the utility model, the top cap is close to a side surface of end cover is provided with the strengthening rib, arrange of strengthening rib with the inner structure phase-match of end cover.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model adopts the heat-conducting glue to replace a heat-conducting metal plate/a stamping liquid cooling plate, so that the heat of the battery cell can be directly transmitted to the bottom shell through the heat-conducting glue, the transmission path is shortened, the heat dissipation effect of the battery module is improved, the weight of the battery module can be lightened, and the energy density of the battery module is favorably improved;

(2) the utility model discloses a module upper cover is provided with the bolster, not only can play the cushioning effect to the volume change of electric core subassembly in the charge-discharge process, can also offset and compensate the difference in height that the pencil brought to improve battery module's stability;

(3) the utility model adopts FPC integration mode and light weight design, reduces the number of structural members, improves the space utilization rate, and further improves the volume energy density and the mass energy density of the battery module;

(4) the utility model provides a battery module can possess higher energy density, good stability and excellent heat dispersion simultaneously, has reached the effect of taking into account each item performance.

Drawings

Fig. 1 is a schematic view illustrating an exploded structure of a battery module according to an embodiment of the present invention.

Fig. 2 is an exploded schematic view of a module top cover according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a U-shaped module bottom case according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a second end cap according to an embodiment of the present invention.

Wherein, 100-electric core component; 200-a first insulator; 300-a first end cap; 400-module upper cover; 410-a cover body; 411-a limiting hole; 412-positive identification; 413-negative pole identification; 420-a buffer; 500-FPC harness; 600-a second end cap; 610-a top cover; 620-end cap; 700-a second insulator; 800-U-shaped module bottom shell; 810-a U-shaped housing; 811-identification bits; 812-a restraint post; 820-an insulating layer; 830-glue blocking strip; 900-heat conducting glue.

Detailed Description

It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; 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 by those of ordinary skill in the art through specific situations.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In a specific embodiment, the utility model provides a battery module, as shown in fig. 1, the battery module includes electric core subassembly 100, electric core subassembly 100 is located the inside of U-shaped module bottom shell 800, the opposite both ends of electric core subassembly 100 are provided with first module end subassembly and second module end subassembly, the top of electric core subassembly 100 is provided with module upper cover 400, electric core subassembly 100 is located the space that U-shaped module bottom shell 800, first module end subassembly, second module end subassembly and module upper cover 400 enclose.

The heat conducting glue 900 is filled between the electric core assembly 100 and the bottom surface of the U-shaped module bottom case 800, as shown in fig. 2, the module upper cover 400 includes a cover body 410, a buffer member 420 is disposed on a side surface of the cover body 410 close to the electric core assembly 100, and an FPC harness 500 is disposed between the buffer member 420 and the electric core assembly 100.

In the utility model, the U-shaped module bottom shell 800 wraps the bottom surface and two opposite side surfaces of the cell assembly 100, and the two ends of the cell assembly 100 which are not wrapped by the U-shaped module bottom shell 800 are respectively provided with a first module end assembly and a second module end assembly; thus, the entire electrical core assembly 100 is located in the space enclosed by the U-shaped module bottom shell 800, the first module end assembly, the second module end assembly and the module top cover 400.

The utility model adopts the heat-conducting glue 900 arranged between the electric core assembly 100 and the bottom surface of the U-shaped module bottom shell 800 to replace a heat-conducting metal plate/punching liquid cooling plate, so that the heat of the electric core can be directly transmitted to the bottom shell through the heat-conducting glue 900, the transmission path is shortened, the heat dissipation effect of the battery module is improved, the weight of the battery module can be lightened, and the energy density of the battery module is favorably improved; the buffer member 420 arranged on the module upper cover 400 can buffer the volume change of the cell assembly 100 in the charging and discharging processes, and can offset and compensate the height difference caused by the wire harness, so that the stability of the battery module is improved; in addition, adopt FPC pencil 500 lightweight design, can reduce the quantity of structure, improve space utilization, and then promote the volume energy density and the quality energy density of battery module. Therefore, the utility model provides a battery module has reached the effect of taking into account each item performance through the heat-conducting glue 900, bolster 420 and the interact between the FPC pencil 500.

Furthermore, the material of the middle buffer member 420 can be foam, PU/EPDM/CR or ceramic fiber, etc. with extremely low thermal conductivity, good thermal insulation and insulation, and compressible elastic material. Meanwhile, it should be noted that the present invention does not specifically require and limit the shape of the buffer 420 and the fixing manner of the buffer on the cover 410, and the buffer 420 shape and the fixing manner of the buffer on the cover 410, which can play the buffering effect of the volume change and the wire harness height difference generated in the charging and discharging process of the electric core assembly 100, are all suitable for the present invention, and those skilled in the art can adjust the shape of the buffer 420 and the fixing manner of the buffer on the cover 410 according to the actual production conditions.

Further, as shown in fig. 3, the U-shaped module bottom case 800 includes a U-shaped housing 810 and an insulating layer 820 disposed on an inner surface of the U-shaped housing 810, two opposite open ends of the U-shaped housing 810 are provided with glue blocking strips 830, the glue blocking strips 830 and the side walls of the U-shaped housing 810 enclose a rectangular frame on the bottom surface of the U-shaped housing 810, and the heat conducting glue 900 is filled in the rectangular frame.

The utility model discloses in, lateral wall through keeping off adhesive tape 830 and U-shaped casing 810 forms the structure (rectangle frame) of four sides ring mountain in the inner chamber bottom surface of U-shaped module drain pan 800 to conveniently pour into the heat-conducting glue 900 of two ingredients into, connect electric core subassembly 100 and U-shaped module drain pan 800 through heat-conducting glue 900.

Furthermore, identification positions 811 are symmetrically arranged on the outer surface of the side wall of the U-shaped housing 810, the identification positions 811 are close to the bottom of the U-shaped housing 810 and are close to the adhesive blocking strips 830, and the identification positions 811 serve as welding identification points for the U-shaped module bottom case 800 and the first module end assembly and the second module end assembly respectively.

The utility model discloses in can guarantee the welding position accuracy of U-shaped module end subassembly 800 and first module end subassembly and second module end subassembly through discernment position 811.

Further, a limiting post 812 is disposed at the top end of the side wall of the U-shaped housing 810, a limiting hole 411 matched with the limiting post 812 is formed in the cover body 410, and the module upper cover 400 is mounted on the U-shaped module bottom case 800 through the limiting post 812 and the limiting hole 411; furthermore, the limiting holes 411 are symmetrically arranged on two sides of the cover 410, and each limiting hole 411 corresponds to one limiting column 812; a positive electrode mark 412 and a negative electrode mark 413 are provided on a surface of the cover body 410 on a side away from the bumper 420.

The utility model discloses when installation module upper cover 400, the spacing hole 411 of module upper cover 400 cooperatees with the spacing post 812 of U-shaped module chassis 800, has injectd module upper cover 400 and also has injectd the removal degree of freedom of U-shaped module chassis 800 on its width direction simultaneously on its length direction to guarantee the side of module upper cover 400 and the side laminating zero clearance of U-shaped module chassis 800, be favorable to improving welding quality.

In addition, the design of the upper surface of the cover body 410 has a positive pole mark 412 and a negative pole mark 413, and after the module upper cover 400 is assembled and the positive and negative pole copper bars are identified by equipment, the printing is carried out on a production line, so that the problem of reverse assembly of the supplied materials is avoided.

Further, the FPC harness 500 includes an FPC flat cable, a nickel plate, a low-voltage connector, and a temperature sensing element, wherein a circuit is pressed inside the FPC flat cable, and a voltage signal collected by the nickel plate and a temperature signal collected by the temperature sensing element are both transmitted to the low-voltage connector through the circuit in the FPC flat cable.

The utility model discloses well FPC winding displacement is inside to be pressed there is the circuit, and the equipment welding back can gather the real-time voltage of electric core through the nickel piece, gathers the real-time temperature of electric core through the temperature sensing component. The wiring harness is designed in an FPC (flexible printed circuit) integration mode in a light weight mode, the number of structural members is reduced, the space utilization rate is improved, and the space energy density and the mass energy density of the battery module are improved.

And simultaneously, the utility model discloses well bolster 420 also can play the heat preservation effect to the temperature sensing element in FPC pencil 500, avoids the temperature to dissipate to guarantee temperature acquisition's accuracy. Furthermore, the temperature sensitive element may be a temperature sensor.

Further, the first modular end assembly includes a first insulator 200 and a first end cap 300, and the second modular end assembly includes a second insulator 700 and a second end cap 600.

First insulating member 200 and second insulating member 700 set up respectively in the relative both ends of electric core subassembly 100, and first end cover piece 300 is located the one side that electric core subassembly 100 was kept away from to first insulating member 200, and second end cover piece 600 is located the one side that electric core subassembly 100 was kept away from to second insulating member 700, and U-shaped module drain pan 800, first end cover piece 300, second end cover piece 600 and module upper cover 400 enclose into the airtight space who holds electric core subassembly 100.

The utility model discloses well first insulating part 200 and second insulating part 700 are located the relative both ends of battery module group 100 respectively, have realized through utmost point ear welding that the cluster of electric core is parallelly connected and the positive negative pole of battery module is drawn forth. Meanwhile, the first and second caps 300 and 600 protect the first and second insulators 200 and 700, respectively.

In addition, the module upper cover 400 and the U-shaped module bottom shell 800 are used as carriers of the cell module 100 and are welded with the first end cover piece 300 and the second end cover piece 600 to form a whole, six surfaces of the battery module are made of aluminum alloy, and the battery module is supported stably, so that the structural strength and rigidity of the whole module are suitable for various working conditions of automobile running; and first end cap piece 300, second end cap piece 600, module upper cover 400 and U-shaped module end shell 800 are lightweight aluminum alloy material, and wherein first end cap piece 300 and second end cap piece 600 adopt cast aluminium technology or extrusion process, and module upper cover 400 and U-shaped module end shell 800 adopt panel beating punching press bending process, and existing welding that does benefit to, reduce cost can reduce battery module's weight again, promotes battery module's energy density.

Further, through holes are provided on both the first end cap 300 and the second end cap 600, and the through holes are used as fixing holes or hoisting holes.

The utility model discloses in, the through-hole is used for battery module and driving system to be connected fixedly as the fixed orifices, and the through-hole is convenient for the transport of battery module in the equipment process as the hole for hoist.

Further, as shown in fig. 4, each of the first end cap 300 and the second end cap 600 includes a top cap 610 and an end cap 620, the top cap 610 of the first end cap 300 is disposed between the first insulating member 200 and the end cap 620 of the end cap, and the top cap 610 of the second end cap 600 is disposed between the second insulating member 700 and the end cap 620 of the end cap.

The utility model provides a top cap 610 is insulating top cap 610, plays the effect of protection and insulation to the electric core utmost point ear in first insulating part 200 and the second insulating part 700.

Further, a reinforcing rib is arranged on the surface of one side, close to the end cover 620, of the top cover 610, and the arrangement of the reinforcing rib is matched with the internal structure of the end cover 620.

The utility model discloses in, top cap 610's strengthening rib design is in one side (the outside of top cap 610 promptly) that is close to end cover 620 to do the profile modeling design with end cover 620, thereby reduced top cap 610 and first insulator 200, and the space between top cap 610 and the second insulator 700, thereby reduced inside glue injection volume, alleviateed battery module weight, promote battery module's energy density.

The applicant states that the above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.

Claims (10)

1. A battery module is characterized in that the battery module comprises a battery assembly, the battery assembly is positioned in a U-shaped module bottom shell, a first module end assembly and a second module end assembly are arranged at two opposite ends of the battery assembly, a module upper cover is arranged at the top of the battery assembly, and the battery assembly is positioned in a space surrounded by the U-shaped module bottom shell, the first module end assembly, the second module end assembly and the module upper cover;

the utility model discloses a module, including U-shaped module drain pan, lid, battery core subassembly, lid upper cover, bolster and FPC pencil, the battery core subassembly with it has the heat-conducting glue to fill between the bottom surface of U-shaped module drain pan, the module upper cover includes the lid, the lid is close to a side surface of battery core subassembly is provided with the bolster, the bolster with be provided with the FPC pencil between the battery core subassembly.

2. The battery module according to claim 1, wherein the U-shaped module bottom case comprises a U-shaped case and an insulating layer disposed on an inner surface of the U-shaped case, wherein two opposite open ends of the U-shaped case are provided with adhesive blocking strips, the adhesive blocking strips and the side walls of the U-shaped case form a rectangular frame on the bottom surface of the U-shaped case, and the rectangular frame is filled with the thermal conductive adhesive.

3. The battery module as set forth in claim 2, wherein the U-shaped housing has identification sites symmetrically disposed on the outer surface of the sidewall thereof, the identification sites being disposed near the bottom of the U-shaped housing and near the glue stop strip, the identification sites serving as welding identification points for the U-shaped module bottom housing to the first module end assembly and the second module end assembly, respectively.

4. The battery module of claim 2, wherein a limiting post is disposed on the top of the side wall of the U-shaped housing, the cover has a limiting hole matching with the limiting post, and the upper module cover is mounted on the bottom housing of the U-shaped module through the limiting post and the limiting hole.

5. The battery module according to claim 4, wherein the limiting holes are symmetrically arranged on two sides of the cover body, and each limiting hole corresponds to one limiting column;

and a positive pole mark and a negative pole mark are arranged on the surface of one side of the cover body, which is far away from the buffer piece.

6. The battery module according to claim 1, wherein the FPC harness comprises an FPC flat cable, a nickel sheet, a low-voltage connector and a temperature sensing element, a circuit is pressed in the FPC flat cable, and a voltage signal collected by the nickel sheet and a temperature signal collected by the temperature sensing element are transmitted to the low-voltage connector through the circuit in the FPC flat cable.

7. The battery module as set forth in claim 1, wherein the first module end assembly comprises a first insulator and a first end cap, and the second module end assembly comprises a second insulator and a second end cap;

the first insulating part with the second insulating part set up respectively in the relative both ends of electricity core subassembly, first end cover member is located first insulating part is kept away from one side of electricity core subassembly, the second end cover member is located the second insulating part is kept away from one side of electricity core subassembly, U-shaped module drain pan first end cover member the second end cover member with the module upper cover encloses into and holds the airtight space of electricity core subassembly.

8. The battery module according to claim 7, wherein the first end cover and the second end cover are each provided with a through hole as a fixing hole or a lifting hole.

9. The battery module of claim 7, wherein the first end cap and the second end cap each comprise a top cap and an end cap, the top cap of the first end cap being disposed between the first insulator and the end cap of the end cap, the top cap of the second end cap being disposed between the second insulator and the end cap of the end cap.

10. The battery module as recited in claim 9, wherein a surface of the top cover adjacent to the end cap is provided with ribs, and the ribs are arranged to match an internal structure of the end cap.

Images