CN211743260U

CN211743260U - Battery module and car

Info

Publication number: CN211743260U
Application number: CN202020855222.2U
Authority: CN
Inventors: 李登科; 林玉春; 陶亮; 赵卫军
Original assignee: Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-10-23
Anticipated expiration: 2030-05-20

Abstract

The embodiment of the utility model provides a battery module and car relates to battery technical field. The battery module comprises a battery pack body, a bus bar, an end plate assembly, a shell assembly and a filling body, wherein the end plate assembly is connected with the shell assembly and encloses a cavity, the battery pack body is arranged in the cavity and is electrically connected with the bus bar, and the filling body is at least filled between the bus bar and the battery pack body and at least covers a tab of the battery pack body and is used for supporting and positioning the tab. The utility model discloses manufacturing process is simple, the wholeness is good, is favorable to improving the anti-vibration impact ability in the use.

Description

Battery module and car

Technical Field

The utility model relates to a battery technology field particularly, relates to a battery module and car.

Background

Current laminate polymer battery module all is provided with working of plastics or insulating part that is used for supporting the busbar, can play the effect of supporting the busbar on the one hand, and on the other hand also can play insulating effect.

However, the prior art has complex process, poor integrity and low reliability.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module and car, its manufacturing process is simple, the wholeness is good, is favorable to improving the anti-vibration impact ability in the use.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present invention provides a battery module, including core subassembly, busbar, end plate subassembly, casing subassembly and obturator, the end plate subassembly with the casing subassembly is connected to enclose into the cavity, core subassembly set up in the cavity, and with the busbar electricity is connected, the obturator at least fill in the busbar with between the core subassembly, and at least cladding the utmost point ear of core subassembly is used for supporting, location and insulation the electric core of core subassembly utmost point ear with the busbar.

In an alternative embodiment, the filling body is an insulating fillable material.

In an alternative embodiment, the cell assembly includes a plurality of cells stacked in sequence, each of the cells has a tab, an end of the cell has a protrusion, and the filling body has a containing groove, and the protrusion is contained in the containing groove.

In an optional embodiment, the filling body further has a mounting groove communicated with the accommodating groove, the mounting groove penetrates through the filling body, and the tab extends along the mounting groove and is electrically connected with the busbar.

In an alternative embodiment, the extension direction of the mounting groove is inclined with respect to the side surface of the filling body.

In an optional embodiment, the filling body has an opening on another side surface opposite to the accommodating groove, and two adjacent mounting grooves are communicated with the same opening.

In an optional embodiment, the battery cell assembly further includes a buffer component or a heat conducting component, where the buffer component or the heat conducting component is disposed between two adjacent battery cells and attached to the two adjacent battery cells.

In an optional embodiment, the housing assembly includes a rectangular outer frame formed by extrusion molding or tailor welding, and the rectangular outer frame and the end plate assembly enclose the cavity.

In an alternative embodiment, the inside of the end plate assembly is provided with an insulating part, and the insulating part is made of plastic end plates or insulating paint.

In an alternative embodiment, the housing assembly includes a U-shaped bottom plate and an upper cover plate, the U-shaped bottom plate is connected to the upper cover plate, the end plate assembly is connected to at least one of the U-shaped bottom plate and the upper cover plate, and the U-shaped bottom plate, the upper cover plate, and the end plate assembly enclose the cavity.

In an alternative embodiment, the end plate assembly includes a metal end plate and a plastic end plate, the plastic end plate is connected to the metal end plate, the metal end plate is connected to at least one of the U-shaped bottom plate and the upper cover plate, and the U-shaped bottom plate, the upper cover plate and the plastic end plate enclose the cavity.

In an alternative embodiment, the metal end plate is welded to the U-shaped bottom plate and the cover plate.

In a second aspect, an embodiment of the present invention provides an automobile, including the battery module as set forth in any one of the foregoing embodiments.

The embodiment of the utility model provides a beneficial effect is: this battery module sets up this obturator between busbar and electric core subassembly through the mode of filling, can make the obturator closely laminate with the terminal surface of busbar, electric core subassembly and the utmost point ear of electric core subassembly, is favorable to promoting the wholeness or the wholeness of utmost point ear and busbar to provide good support and fixed effect for busbar and utmost point ear. For the prior art who adopts structures such as working of plastics, the embodiment of the utility model provides a battery module only needs can accomplish the manufacturing and the assembly of obturator to filling the obturator between busbar and the electric core module, and structures such as working of plastics need be made earlier, assembles making fashioned structure. Obviously, the embodiment of the utility model provides a manufacturing process of battery module is simpler, convenient, and the cost is lower. The embodiment of the utility model provides a battery module and manufacturing process's manufacturing process is simple, the wholeness is good, is favorable to improving the anti-vibration impact ability in the use. The automobile has the battery module and also has good vibration and impact resistance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of the structure at B in FIG. 3;

FIG. 5 is a schematic structural diagram of the packing body in FIG. 1;

FIG. 6 is a schematic structural diagram of the filling body in FIG. 5 from another view angle;

fig. 7 is a schematic view of a connection structure of the tab and the bus bar in fig. 4.

Icon: 100-a battery module; 110-an electrical core assembly; 111-a tab; 112-electric core; 1121-projection; 113-a thermally conductive member; 120-a bus; 130-an end plate assembly; 131-metal end plates; 132-plastic end plates; 140-a housing assembly; 141-U shaped bottom plate; 142-an upper cover plate; 150-a filler; 151-a receiving groove; 152-a mounting groove; 153-opening.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to fig. 3, a battery module 100 according to an embodiment of the present invention is shown, where the battery module 100 can be applied to a new energy vehicle, such as an electric vehicle, and is used to provide power for the new energy vehicle.

It should be noted that the battery module 100 provided by the embodiment of the present invention may be a pouch battery, but is not limited thereto, and the battery module 100 may also be in other possible battery forms, and therefore, the embodiment of the present invention is not limited specifically.

In the embodiment of the present invention, the battery module 100 includes a battery assembly 110, a bus bar 120, an end plate assembly 130, a housing assembly 140 and a filling body 150, wherein the end plate assembly 130 is connected to the housing assembly 140 and encloses a cavity, the battery assembly 110 is disposed in the cavity and electrically connected to the bus bar 120, the filling body 150 is at least filled between the bus bar 120 and the battery assembly 110 and at least covers the tab 111 of the battery assembly 110 for supporting and positioning the tab 111 and the bus bar 120.

It should be noted that, the filling body 150 at least fills between the bus bar 120 and the electric core assembly 110 means that the filling body 150 is disposed between the bus bar 120 and the electric core assembly 110 in a filling process, and covers the tabs 111 of the electric core assembly 110, the tabs 111 covered by the filling body 150 are tightly connected with the filling body 150, meanwhile, the tabs 111 are connected to the bus bar 120, and the filling body 150 at least fills between the bus bar 120 and the end of the electric core assembly 110, i.e. at least covers the area between the bus bar 120 and the electric core assembly 110, and plays a role in fixing the tabs 111, and also plays a role in supporting and positioning the bus bar 120 connected with the tabs 111.

It should also be noted that in some embodiments, the filling body 150 may also partially cover the bus bar 120, so as to improve the integrity of the bus bar 120, the tab 111, and the core assembly 110, thereby achieving the positioning, supporting, and fixing of the bus bar 120 and the tab 111. At this time, the filling body 150 may be filled between the end plate assembly 130 and the end of the core assembly 110, and it may also be described that the filling body 150 is filled between the upper and lower cases of the case assembly 140.

The embodiment of the utility model provides a battery module 100 sets up this obturator 150 between busbar 120 and electric core subassembly 110 through the mode of filling, can make obturator 150 and busbar 120, electric core subassembly 110's terminal surface and the utmost point ear 111 of electric core subassembly 110 closely laminate, is favorable to promoting utmost point ear 111 and busbar 120's wholeness or wholeness to provide good support and fixed effect for busbar 120 and utmost point ear 111.

It should be noted that, in the prior art, the bus bar 120 is supported by a structural member such as a plastic member, and the following disadvantages exist:

1. the plastic part has a certain structure, the manufacturing process is complex, various assembling and positioning are needed, and the reliability is low;

2. the integrity is poor, because the plastic part, the cell component 110 and the bus bar 120 are separated parts, in the direction of the parts, the lugs 111 of the cell 112 are arranged inside, the integral strength is realized by pressing the edges of the aluminum plastic film by the plastic part, and the reliability is low;

3. the cost is high, the plastic part is often required to be in a complex shape due to the functions of supporting and positioning the tabs 111 and the bus bar 120, the die set is required to be opened, and the material cost is high.

Compare in the prior art through the scheme that structures such as working of plastics supported busbar 120, the embodiment of the utility model provides a obturator 150 that battery module 100 adopted has following technological effect at least:

1. the plastic member and other structural members have a certain structure to support, position, insulate, and the like, and the plastic member and other structural members need to be manufactured through a complicated process, which is more complicated than the process of filling the filling member 150 between the backward bus bar 120 and the electric core assembly 110. Meanwhile, due to its certain structure, it is necessary to position and assemble the battery module 100 when assembling it, resulting in lower reliability. And the embodiment of the utility model provides a battery module 100 through filling this obturator 150, not only can play effects such as better support and location to, simple process does not need the independent assembly, has also promoted battery module 100's assembly efficiency.

2. When the support location of bus bar 120 is realized through the structure such as working of plastics, because the structure such as working of plastics is relatively independent parts with parts such as electric core subassembly 110 and bus bar 120, there is the gap between the structure such as this working of plastics and parts such as electric core subassembly 110, bus bar 120 after the assembly for battery module 100's the wholeness is relatively poor, the reliability of bulk strength is low.

3. Structural components such as plastic parts need a more complicated modeling design in order to realize the functions of supporting and positioning the tab 111 and the bus bar 120, and the die set needs to be opened, and the material cost of the structural components is also high. And the material cost of filler 150 is lower usually, and the cost of manufacturing process is also less than the manufacturing of working of plastics to still saved the assembly step of structures such as working of plastics, now to prior art, the embodiment of the utility model provides a filler 150 still has the characteristics of saving cost.

4. Meanwhile, the material density of the structural members such as plastic members is higher, that is, the mass of the structural members such as plastic members is higher than that of the filling body 150 under the condition of the same volume, so that the overall mass of the battery module 100 is increased. That is to say, the embodiment of the present invention provides a battery module 100, which is filled with the filler 150 to replace the plastic member and other structural members, so that the overall weight of the battery module 100 is lighter (on the premise that other components are the same).

To sum up, the embodiment of the present invention provides a battery module 100, through the mode of filling with this obturator 150 set up between busbar 120 and electric core assembly 110, make obturator 150 closely laminate with busbar 120, electric core assembly 110's terminal surface and electric core assembly 110's utmost point ear 111, be favorable to promoting utmost point ear 111 and busbar 120's wholeness or wholeness nature, and promote the overall reliability to provide good support and fixed effect for busbar 120 and utmost point ear 111. The battery module 100 also saves the assembly process and can save the cost.

Optionally, the filling body 150 may be foam rubber or foam cotton, or other insulating and fillable materials, and the manufacturing process of the battery module 100 according to the embodiment of the present invention includes a step of filling the foam rubber and the foam cotton between the busbar 120 and the electric core assembly 110.

It should be noted that, the utility model provides a battery module 100, when manufacturing, can pack this foaming adhesive or foam to the space intussuseption that casing subassembly 140 and cell subassembly 110 formed, this foaming adhesive or foam fill shaping between casing subassembly 140 and cell subassembly 110 to with the utmost point ear 111 cladding of cell subassembly 110 between this foaming adhesive or foam, play better fixed support effect to utmost point ear 111. Meanwhile, the foam adhesive and the foam cotton are insulating materials, so that a good insulating effect can be achieved, and orderly connection of the plurality of tabs 111 of the battery pack assembly 110 is facilitated.

It should be understood that, in the embodiment of the present invention, the filling body 150 is not limited to the foam rubber and the foam cotton, and may be other foam filling materials. The embodiment of the utility model provides a do not specifically limit to the concrete material of this obturator 150, can be according to concrete production technology or technical requirement, set up the material of this obturator 150 in a flexible way.

Referring to fig. 4, in an alternative embodiment, the battery assembly 110 includes a plurality of battery cells 112 stacked in sequence, each of the battery cells 112 has a tab 111, the tab 111 is electrically connected to the bus bar 120, an end of the battery cell 112 has a protrusion 1121, the filling body 150 has a receiving groove 151, and the protrusion 1121 is received in the receiving groove 151 and attached to an inner wall of the receiving groove 151.

Referring to fig. 5 to 7, the filling body 150 further has an installation groove 152 communicated with the accommodation groove 151, the installation groove 152 penetrates the filling body 150, and the tab 111 extends along the installation groove 152 and is electrically connected to the bus bar 120.

Alternatively, the extending direction of the installation groove 152 is inclined with respect to the side of the packing body 150. It should be understood that the installation groove 152 extends in the same direction as the tab 111, and the inner wall of the installation groove 152 is closely fitted with the tab 111. If the filling body 150 is filled by injecting the foaming glue, the tab 111 is tightly bonded under the action of the foaming glue, and after the filling body 150 is molded, the tab 111 and the filling body 150 are fixed into a whole. Similarly, in the case of the bus bar 120, the foaming glue is tightly adhered to the bus bar 120, and after the filling body 150 is molded, the bus bar 120 and the filling body 150 are fixed as a whole, thereby improving the integrity of the above components.

Alternatively, the packing body 150 has an opening 153 on the other side surface opposite to the receiving groove 151, and two adjacent mounting grooves 152 communicate with the same opening 153. The tabs 111 located in the two adjacent mounting grooves 152 are connected to the bus bar 120, so that the two adjacent tabs 111 and the battery cells 112 corresponding to the two tabs 111 are connected in series.

Referring to fig. 1, optionally, the electric core assembly 110 may further include a buffer or a heat conducting element 113, where the buffer or the heat conducting element 113 is disposed between two adjacent electric cores 112 and attached to the two adjacent electric cores 112. The buffer member can absorb the deformation of the battery cells 112, and the heat conducting member 113 can conduct heat among the battery cells 112, so that the heat distribution is more uniform.

In an alternative embodiment, the housing assembly 140 includes a rectangular outer frame formed by extrusion molding or by welding, and the rectangular outer frame and the end plate assembly define a cavity.

Further, the housing assembly 140 includes a U-shaped bottom plate 141 and an upper cover plate 142, the U-shaped bottom plate 141 is connected to the upper cover plate 142, the end plate assembly 130 is connected to at least one of the U-shaped bottom plate 141 and the upper cover plate 142, and the U-shaped bottom plate 141, the upper cover plate 142 and the end plate assembly 130 enclose a cavity.

In this embodiment, the assembling steps of the battery module 100 may be: firstly, the battery cell 112 module is installed on the U-shaped bottom plate 141; then the upper cover plate 142 is welded on the U-shaped bottom plate 141; and then injecting foaming glue into a space enclosed by the electric core assembly 110, the upper cover plate 142 and the U-shaped bottom plate 141.

In addition, in this embodiment, the steps of assembling the battery module 100 may further include: firstly, the battery cell 112 module is installed on the U-shaped bottom plate 141; after the end plate assembly 130 is welded to the U-shaped base plate 141; and then injecting foaming glue into a space enclosed by the electric core assembly 110, the end plate assembly 130 and the U-shaped bottom plate 141.

It should be understood that the above steps are only optional process steps of the battery module 100 provided by the embodiment of the present invention, and are not limitations of the battery module 100.

In alternative embodiments, the end plate assembly 130 is provided with an insulating portion inside, and the insulating portion may be made of a plastic plate or an insulating material such as insulating paint.

Alternatively, the end plate assembly 130 may include a metal end plate 131 and a plastic end plate 132, the plastic end plate 132 is connected to the metal end plate 131, the metal end plate 131 is connected to at least one of a U-shaped bottom plate 141 and an upper cover plate 142, and the U-shaped bottom plate 141, the upper cover plate 142 and the plastic end plate 132 enclose a cavity.

Alternatively, in the assembly step described above with respect to the battery module 100, the assembly of the metal end plates 131 and the plastic end plates 132 may be performed before the metal end plates 131 are welded to the U-shaped bottom plate 141 to integrally assemble the metal end plates 131 and the plastic end plates 132.

Alternatively, the metal end plate 131 may be welded to the U-shaped base plate 141 and the cover plate, for example, by a laser welding process.

The embodiment of the utility model provides a battery module 100 manufacturing process for make battery module 100 as in any one of the preceding embodiment, this battery module 100 manufacturing process includes: an insulating filling material, such as a foaming glue, is injected into the space defined by the electric core assembly 110 and the housing assembly 140, so that the insulating filling material forms a filling body 150 between the busbar 120 and the electric core assembly 110.

It should be noted that, as mentioned above, the step of injecting the foaming glue into the space between the electric core assembly 110 and the housing assembly 140, so that the foaming glue forms the filling body 150 between the busbar 120 and the electric core assembly 110, may include the following steps:

firstly, the battery cell 112 module is installed on the U-shaped bottom plate 141; then the upper cover plate 142 is welded on the U-shaped bottom plate 141; then injecting foaming glue into a space enclosed by the electric core assembly 110, the upper cover plate 142 and the U-shaped bottom plate 141; after the metal end plate 131 and the plastic end plate 132 of the end plate assembly 130 are assembled, the metal end plate 131 is welded to the U-shaped base plate 141.

Firstly, the battery cell 112 module is arranged on the U-shaped bottom plate 141; after the metal end plate 131 and the plastic end plate 132 of the end plate assembly 130 are assembled, the metal end plate 131 is welded to the U-shaped bottom plate 141; then injecting foaming glue into a space enclosed by the electric core assembly 110, the end plate assembly 130 and the U-shaped bottom plate 141; the upper cover plate 142 is then welded to the U-shaped base plate 141.

An embodiment of the present invention provides an automobile, including the battery module 100 as described in any one of the above embodiments. It should be appreciated that the vehicle has at least similar advantageous effects to those of the battery module 100 described above, namely, advantageous effects of improving vibration and impact resistance during use.

Referring to fig. 1 to fig. 7, a battery module 100 and an automobile according to an embodiment of the present invention: the battery module 100 sets the filling body 150 between the bus bar 120 and the electric core assembly 110 by filling, so that the filling body 150 can be tightly attached to the bus bar 120, the end surface of the electric core assembly 110 and the tab 111 of the electric core assembly 110, which is beneficial to improving the integrity or integrity of the tab 111 and the bus bar 120, thereby providing good supporting and fixing effects for the bus bar 120 and the tab 111. For the prior art that adopts structures such as working of plastics, the embodiment of the utility model provides a battery module 100 only need can accomplish the manufacturing and the assembly of obturator 150 to filling obturator 150 between busbar 120 and the electric core 112 module, and structures such as working of plastics need be made earlier, will make fashioned structure and assemble. Obviously, the manufacturing process of the battery module 100 provided by the embodiment of the present invention is simpler and more convenient, and the cost is lower. The embodiment of the utility model provides a battery module 100's manufacturing process is simple, the wholeness is good, is favorable to improving the anti-vibration impact ability in the use.

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

Claims

1. The utility model provides a battery module, its characterized in that includes electric core subassembly, busbar, end plate subassembly, casing subassembly and obturator, the end plate subassembly with casing subassembly connects to enclose into the cavity, the electric core subassembly set up in the cavity, and with the busbar electricity is connected, the obturator at least fill in the busbar with between the electric core subassembly, and at least cladding the utmost point ear of electric core subassembly for support, location and insulation the electric core of electric core subassembly utmost point ear with the busbar.

2. The battery module according to claim 1, wherein the filler is an insulating fillable material.

3. The battery module according to claim 1 or 2, wherein the battery core assembly comprises a plurality of sequentially stacked battery cells, each battery cell is provided with a tab, the end part of each battery cell is provided with a protruding part, the filling body is provided with a containing groove, and the protruding parts are contained in the containing grooves.

4. The battery module according to claim 3, wherein the packing body further has a mounting groove communicating with the receiving groove, the mounting groove penetrating the packing body, and the tab extending along the mounting groove and electrically connected to the bus bar.

5. The battery module according to claim 4, wherein the filling body has an opening on the other side surface opposite to the receiving groove, and two adjacent mounting grooves communicate with the same opening.

6. The battery module of claim 3, wherein the cell assembly further comprises a buffer member or a heat conducting member, and the buffer member or the heat conducting member is disposed between and attached to two adjacent cells.

7. The battery module according to claim 1 or 2, wherein the housing assembly comprises a rectangular outer frame formed by extrusion molding or tailor welding, and the rectangular outer frame and the end plate assembly enclose the cavity.

8. The battery module according to claim 1 or 2, wherein the end plate assembly is internally provided with an insulating part, and the insulating part is made of a plastic end plate or an insulating paint.

9. The battery module according to claim 1 or 2, wherein the end plates are connected with the case assembly by welding, gluing, riveting or lock bolts.

10. An automobile characterized by comprising the battery module according to any one of claims 1 to 9.