CN218896769U - Battery assembly unit and battery pack - Google Patents

Abstract

The utility model discloses a battery assembly unit and a battery pack, wherein the battery assembly unit comprises: a battery assembly including one or more battery cells; the fixing parts comprise two fixing parts, the two fixing parts are respectively connected to two sides of the battery assembly in the length direction, fixing holes are formed in the fixing parts, and the battery assembly units penetrate through the fixing holes through fasteners and are fixed on a box body of the battery pack. According to the battery assembly unit, the battery assembly unit can be detached from the battery pack while the battery assembly unit is assembled in the battery pack, so that the battery assembly unit is convenient to maintain when the battery assembly unit fails.

Description

Battery assembly unit and battery pack

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a battery assembly unit and a battery pack.

Background

The development trend of the current power battery system is to simplify the structure and components, so that a battery assembly is directly installed into a battery box body, and a CTP scheme for fixing through gluing is provided.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. The utility model is based on the object of providing a battery assembly unit which, while realizing the assembly of a battery pack on a battery pack, allows the battery pack to be removed from the battery pack when required, so that maintenance is facilitated in the event of a failure of the battery pack.

The utility model also provides a battery pack.

The battery assembly unit according to the first aspect of the present utility model includes: a battery assembly including one or more battery cells; the fixing parts comprise two fixing parts, the two fixing parts are respectively connected to two sides of the battery assembly in the length direction, fixing holes are formed in the fixing parts, and the battery assembly units penetrate through the fixing holes through fasteners and are fixed on a box body of the battery pack.

According to the battery assembly unit, the fixing pieces are arranged on the two sides of the battery assembly, and the fixing pieces penetrate through the fixing holes to be fixed on the box body of the battery pack through the fastening pieces, so that the battery assembly unit is assembled on the battery pack, and the battery assembly unit can be disassembled from the battery pack by removing the fastening pieces when needed, so that the battery assembly unit is convenient to maintain when faults occur.

According to some embodiments of the utility model, the fixing member includes a first plate and a second plate connected to each other, the first plate is disposed perpendicular to the second plate, the first plate is adhesively connected to an end surface of the battery assembly in a length direction, and the fixing hole is formed in the second plate.

According to some embodiments of the utility model, the battery assembly further comprises a heat insulating pad provided on at least one side surface of the battery cell in a thickness direction.

According to some embodiments of the utility model, a plurality of the battery cells are arranged in a stacked manner in a thickness direction of the battery cells; or, a plurality of battery monomers are sequentially arranged in the length direction and the thickness direction of the battery monomers, and two adjacent battery monomers are connected in an adhesive mode.

The battery pack according to the second aspect of the present utility model includes: the battery assembly unit comprises a box body and a battery assembly unit according to the first aspect of the utility model, wherein the box body is provided with a mounting cavity, the battery assembly unit is arranged in the mounting cavity, and the battery assembly unit is connected with the box body through a fastener.

According to the battery pack disclosed by the utility model, by arranging the battery assembly unit in the first aspect, the battery assembly unit is connected with the box body of the battery pack through the fastener, so that the battery assembly unit can be detached, and the battery assembly unit is convenient to maintain when faults occur.

According to some embodiments of the utility model, the battery pack further comprises: the cold plate is arranged in the mounting cavity and is positioned between the bottom wall of the mounting cavity and the battery assembly unit; the battery assembly device comprises a battery assembly unit, a plurality of limiting strips, a plurality of battery assembly units and a plurality of battery assembly units, wherein the battery assembly unit is arranged on the battery assembly unit, and the battery assembly unit is arranged on the battery assembly unit.

According to some embodiments of the utility model, the plurality of limiting strips further define a second glue application area, wherein a heat conducting structural glue is arranged in the second glue application area, the cold plate is connected with the battery assembly unit through the heat conducting structural glue, and the battery pack further comprises a cutting piece, and the cutting piece is configured to be suitable for cutting the heat conducting structural glue along the horizontal direction.

According to some embodiments of the present utility model, the limiting strips limiting the second glue spreading area include a first limiting strip and a second limiting strip, the first limiting strip and the second limiting strip extend along a first direction and are arranged at intervals in a second direction, the second direction is perpendicular to the first direction, a first channel penetrating the first limiting strip along the first direction is formed in the first limiting strip, a second channel penetrating the second limiting strip along the first direction is formed in the second limiting strip, the cutting piece is formed as a cutting rope, one end of the cutting rope is fixed on the box after passing through the first channel, the other end of the cutting rope is fixed on the box after passing through the second channel, and the cutting rope is configured to cut a side wall of the first channel facing the heat conducting structural glue, a side wall of the second channel facing the heat conducting structural glue and the heat conducting structural glue under the action of external force.

According to some embodiments of the utility model, the box body is provided with a placing groove, and two ends of the cutting rope extend to the placing groove and are fixed in the placing groove.

According to some embodiments of the utility model, the battery pack further comprises a flap that openably covers the placement groove.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic view of a battery assembly unit according to some embodiments of the present utility model;

fig. 2 is a schematic view of a battery assembly unit according to other embodiments of the present utility model;

fig. 3 is a schematic view of a battery assembly unit according to still other embodiments of the present utility model;

fig. 4 is a schematic view of a battery assembly unit according to further embodiments of the present utility model;

FIG. 5 is a schematic illustration of a battery pack according to some embodiments of the utility model;

FIG. 6 is a schematic view of the battery pack shown at another angle;

fig. 7 is a schematic view of a battery pack according to other embodiments of the present utility model;

FIG. 8 is a schematic view of the battery pack shown in FIG. 7 at another angle;

FIG. 9 is a schematic view of the battery pack shown in FIG. 8 at yet another angle;

FIG. 10 is a schematic view of the case shown in FIG. 7;

FIG. 11 is a partial enlarged view of the case shown in FIG. 10;

FIG. 12 is a schematic view of another angle of the case shown in FIG. 10;

fig. 13 is a partially enlarged view of the case shown in fig. 12.

Reference numerals:

1000. a battery pack;

100. a battery assembly unit;

10. a battery assembly; 11. a battery cell; 12. a heat insulating mat;

20. a fixing member; 21. a fixing hole; 22. a first plate; 23. a second plate;

30. a cold plate; 31. a limit bar; 32. a first glue area; 33. a second glue area; 34. a first limit bar; 35. the second limit bar; 36. a first channel; 37. a second channel;

40. a cutting member;

200. a case; 210. a mounting cavity; 220. and (5) placing a groove.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A battery mounting unit 100 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 6.

As shown in fig. 1, 2, 5 and 6, a battery assembly unit 100 according to an embodiment of the first aspect of the present utility model includes: the battery pack 10 and the fixing members 20, specifically, the battery pack 10 includes one or more battery cells 11, the fixing members 20 include two fixing members 20 respectively connected to both sides in the longitudinal direction (e.g., the left and right directions as viewed in fig. 1) of the battery pack 10, fixing holes 21 are provided in the fixing members 20, and the battery assembly unit 100 is fixed to the case 200 of the battery pack 1000 through the fixing holes 21 by fasteners.

When the battery assembly unit 100 is assembled in the battery pack 1000, the fixing pieces 20 connected to the two ends of the battery assembly 10 are provided with the fixing holes 21, the box body 200 of the battery pack 1000 is provided with the corresponding mounting holes, the battery assembly unit 100 is assembled on the battery pack 1000 through the fixing pieces 20 and the mounting holes by fastening pieces, when the battery assembly unit 100 needs to be disassembled from the battery pack 1000, the battery assembly unit 100 can be disassembled from the box body 200 of the battery pack 1000 by removing the fastening pieces passing through the fixing holes 21 and the mounting holes, and therefore, the battery assembly unit 100 is convenient to maintain when faults occur.

According to the battery assembly unit 100 of the present utility model, by providing the fixing members 20 at both sides of the battery assembly 10, the fixing members 20 can be fixed to the case 200 of the battery pack 1000 through the fixing holes 21 by means of the fastening members, thereby realizing the assembly of the battery assembly unit 100 on the battery pack 1000, and the battery assembly unit 100 can be disassembled from the battery pack 1000 by removing the fastening members when necessary, thereby facilitating the maintenance of the battery assembly unit 100 when a malfunction occurs.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the fixing member 20 includes a first plate 22 and a second plate 23 connected, the first plate 22 is disposed perpendicular to the second plate 23, the first plate 22 is adhesively connected to an end surface of the battery assembly 10 in a longitudinal direction (e.g., a left-right direction as viewed in fig. 2), and the fixing hole 21 is formed in the second plate 23. Through setting up vertically first board 22 and second board 23, first board 22 is connected with the terminal surface bonding of battery pack 10, and bonding connection fastening and simple operation, second board 23 is connected through fixed orifices 21 with the box 200 of battery package 1000, realizes the detachable connection of battery assembly unit 100 and the box 200 of battery package 1000, and then realizes the assembly of battery assembly unit 100 on battery package 1000.

In some embodiments of the present utility model, as shown in fig. 1, the battery assembly 10 further includes a heat insulation pad 12, the heat insulation pad 12 being provided on at least one side surface of the battery cell 11 in a thickness direction (e.g., a front-rear direction shown in fig. 1), the heat insulation pad 12 also playing a role of shock absorption while insulating heat.

In some embodiments of the present utility model, as shown in fig. 1, 2, 3, and 4, a plurality of battery cells 11 are arranged in a stacked manner in the thickness direction of the battery cells 11 (e.g., the front-rear direction shown in fig. 3); or, a plurality of battery cells 11 are sequentially arranged in the length direction (for example, the left-right direction shown in fig. 3) and the thickness direction (for example, the front-rear direction shown in fig. 3) of the battery cells 11, two adjacent battery cells 11 are connected in an adhesive manner, the plurality of battery cells 11 can be sequentially arranged in the length direction and the thickness direction of the battery cells 11, the battery cells 11 are arranged according to different arrangement spaces of the battery pack 1000, the shape of the battery pack 1000 is matched with the arrangement spaces, and two adjacent battery cells 11 are connected in an adhesive manner, so that the adhesive connection is more convenient and the connection is more secure.

For example, as shown in fig. 1, the battery assembly unit 100 includes only one battery cell 11 and two fixing members 20, and the two fixing members 20 are respectively fixed at both sides of the battery cell 11 in the length direction.

As shown in fig. 2, the battery assembly unit 100 includes two battery cells 11 and two fixing members 20, the two battery cells 11 being arranged side by side in the length direction and being adhesively connected, the two fixing members 20 being fixed to both sides of the two battery cells 11 in the length direction, respectively.

As shown in fig. 3, the battery assembly unit 100 includes two battery cells 11 and two fixing members 20, the two battery cells 11 being arranged side by side in the thickness direction and being adhesively connected, the two fixing members 20 being fixed to both sides of the two battery cells 11 in the length direction, respectively.

As shown in fig. 4, the battery assembly unit 100 includes four battery cells 11 and two fixing members 20, the four battery cells 11 are bonded and connected in two groups after being arranged side by side in the thickness direction, then the two groups of battery cells are arranged and connected in the length direction, and finally the two fixing members 20 are respectively fixed at two sides of the four battery cells in the length direction.

In some embodiments of the present utility model, the securing member 20 is manufactured using an integral extrusion process, resulting in a stronger securing member 20.

Wherein, optionally, the fixing piece 20 is made of an aluminum profile, and the aluminum profile has stable chemical property and lower density, so that the battery assembly unit 100 is lighter.

A battery pack 1000 according to an embodiment of the second aspect of the present utility model is described below with reference to fig. 7 to 13.

As shown in fig. 7, 8 and 9, a battery pack 1000 according to an embodiment of the second aspect of the present utility model includes: the case 200 and the battery assembly unit 100 of the above-described first aspect embodiment, wherein the case 200 has the mounting cavity 210, and the battery assembly unit 100 is connected with the case 200 by a fastener.

According to the battery pack 1000 of the second aspect of the embodiment of the present utility model, by providing the battery pack unit 100 of the first aspect described above, the battery pack unit 100 is connected to the case 200 of the battery pack 1000 by fasteners, so that the battery pack unit 100 can be disassembled, and maintenance and replacement are facilitated when the battery pack unit 100 fails. Meanwhile, the plurality of battery cells 11 in the battery pack 1000 are connected in a non-integral manner, and are assembled into the plurality of battery assembly units 100, so that heat conduction between the battery assembly units 100 can be reduced, when the battery assembly units 100 are subject to thermal runaway, the risk of thermal runaway spreading is reduced, and the safety is improved.

In some embodiments of the present utility model, as shown in fig. 6, the fixing members 20 of two adjacent battery assembly units 100 are stacked in the longitudinal direction (e.g., the left-right direction shown in fig. 6) of the battery cells 11, and at this time, the second plates 23 of the two adjacent fixing members 20 are stacked one above the other, the fixing holes 21 on the second plates 23 are projected to overlap, and the fastening members pass through the two fixing holes 21 and are engaged with a corresponding mounting hole on the case 200, so that the two adjacent battery assembly units 100 can be fixed, thereby reducing the space occupation of the battery assembly units 100.

In some embodiments of the present utility model, as shown in fig. 10 and 11, the battery pack 1000 further includes: the cold plate 30 and a plurality of spacing 31, wherein, cold plate 30 locates in the installation cavity 210 and is located between the diapire of installation cavity 210 and battery assembly unit 100, and a plurality of spacing 31 interval arrangement, a plurality of spacing 31 limit the first rubber coating district 32, establish the heat conduction glue in the first rubber coating district 32, the heat conduction glue is laminated with the diapire of battery assembly unit 100. Through setting up cold plate 30, cold plate 30 can with battery assembly cell 100 heat exchange to make battery cell 11 work in the battery assembly cell 100 in suitable temperature range, through setting up a plurality of spacing bars 31, when limiting first rubber coating district 32, a plurality of spacing bars 31 still play the locate action when scribbling the heat conduction glue, avoid the heat conduction glue to scribble the off tracking, the heat conduction glue can be with heat transfer from battery assembly cell 100 to cold plate 30 when filling the clearance between battery assembly cell 100 diapire and the cold plate 30, improves the heat exchange efficiency between battery assembly cell 100 and the cold plate 30.

In some embodiments of the present utility model, as shown in fig. 10 and 11, the plurality of stopper bars 31 further define a second glue application region 33, a heat conductive structural glue is disposed in the second glue application region 33, the cold plate 30 is connected to the battery assembly unit 100 through the heat conductive structural glue, and the battery pack 1000 further includes a cutting member 40, and the cutting member 40 is configured to cut the heat conductive structural glue in a horizontal direction. The plurality of limiting strips 31 also play a role in positioning when the second gluing area 33 is defined and the heat conducting structural glue is coated in the second gluing area 33, the heat conducting structural glue is arranged in the second gluing area 33, so that the cold plate 30 is in adhesive connection with the electric battery assembly unit 100, and the cutting piece 40 is used for cutting the heat conducting structural glue when the battery assembly unit 100 needs to be detached from the battery pack 1000, so that the bottom wall of the battery assembly unit 100 is separated from the cold plate 30 through the heat conducting structural glue connection part, and the battery assembly unit 100 can be detached from the battery pack 1000 smoothly.

In some embodiments of the present utility model, as shown in fig. 10, 11 and 12, the stop bar 31 that stops the second glue area 33 includes a first stop bar 34 and a second stop bar 35, the first stop bar 34 and the second stop bar 35 extend along a first direction (e.g., a front-to-rear direction as shown in fig. 10) and are spaced apart in a second direction (e.g., a left-to-right direction as shown in fig. 10), the second direction is perpendicular to the first direction, a first channel 36 that penetrates the first stop bar 34 along the first direction is formed in the first stop bar 34, and a second channel 37 that penetrates the second stop bar 35 along the first direction is formed in the second stop bar 35. The first and second stopper bars 34 and 35 provide an arrangement space for the cutting member 40 while the second glue application area 33 is being stopped, the first and second passages 36 and 37 in the first and second stopper bars 34 and 35 penetrate into the first and second passages 36 and 37 from one ends (e.g., the rear ends shown in fig. 10) of the first and second passages 36 and 37 in a first direction, respectively, and penetrate out from the other ends (e.g., the front ends shown in fig. 10) of the first and second passages 36 and 37.

In some embodiments, as shown in fig. 10, 11 and 12, the cutting member 40 is formed as a cutting cord, one end of which is fixed to the case 200 after passing through the first passage 36, and the other end of which is fixed to the case 200 after passing through the second passage 37, and is configured to cut the side wall of the first passage 36 facing the heat conductive structural adhesive, the side wall of the second passage 37 facing the heat conductive structural adhesive, and the heat conductive structural adhesive by external force. The cutting strings are conveniently arranged in the first and second channels 36 and 37, and when the battery assembly unit 100 is required to be detached from the battery pack 1000, both ends of the cutting strings are pulled to pull the cutting strings out of the first and second channels 36 and 37, and the cutting strings cut the heat conductive structural adhesive connecting the bottom wall of the battery assembly unit 100 and the cold plate 30 during pulling, so that the battery assembly unit 100 is separated from the cold plate 30, thereby facilitating the detachment of the battery assembly unit 100 from the battery pack 1000.

In some embodiments of the present utility model, as shown in fig. 7, a placement groove 220 is provided on the case 200, both ends of the cutting string extend to the placement groove 220 and are fixed in the placement groove 220, and the placement groove 220 provides a placement space for both ends of the cutting string and limits displacement of the cutting string.

In some embodiments of the present utility model, the battery pack 1000 further includes a movable plate that openably covers the placement groove 220, and prevents the placement groove 220 from being in contact with the outside when the movable plate covers the placement groove 220, and the cutting string can be operated from the placement groove 220 to cut the heat conductive structural adhesive through the cutting string when the battery assembly unit 100 needs to be detached from the battery pack 1000.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery assembly unit, comprising:

a battery assembly including one or more battery cells;

the fixing parts comprise two fixing parts, the two fixing parts are respectively connected to two sides of the battery assembly in the length direction, fixing holes are formed in the fixing parts, and the battery assembly units penetrate through the fixing holes through fasteners and are fixed on a box body of the battery pack.

2. The battery assembly unit according to claim 1, wherein the fixing member includes a first plate and a second plate connected to each other, the first plate being disposed perpendicularly to the second plate, the first plate being adhesively connected to an end face of the battery assembly in a length direction, the fixing hole being formed in the second plate.

3. The battery assembly unit according to claim 2, wherein the battery assembly further comprises a heat insulating pad provided to at least one side surface of the battery cell in a thickness direction.

4. The battery assembly unit according to any one of claims 1 to 3, wherein a plurality of the battery cells are arranged in a stacked manner in a thickness direction of the battery cells; or, a plurality of battery monomers are sequentially arranged in the length direction and the thickness direction of the battery monomers, and two adjacent battery monomers are connected in an adhesive mode.

5. A battery pack, comprising:

the box body is provided with an installation cavity;

a plurality of battery assembly units according to any one of claims 1-4, said battery assembly units being disposed within said mounting cavity, said battery assembly units being connected to said housing by fasteners.

6. The battery pack of claim 5, further comprising:

the cold plate is arranged in the mounting cavity and is positioned between the bottom wall of the mounting cavity and the battery assembly unit;

the battery assembly device comprises a battery assembly unit, a plurality of limiting strips, a plurality of battery assembly units and a plurality of battery assembly units, wherein the battery assembly unit is arranged on the battery assembly unit, and the battery assembly unit is arranged on the battery assembly unit.

7. The battery pack of claim 6, wherein the plurality of stop bars further define a second glue area, wherein a thermally conductive structural glue is disposed in the second glue area, wherein the cold plate is connected to the battery assembly unit by the thermally conductive structural glue, and wherein the battery pack further comprises a cutting member configured to cut the thermally conductive structural glue in a horizontal direction.

8. The battery pack of claim 7, wherein the spacing bars that limit the second glue area include a first spacing bar and a second spacing bar that extend in a first direction and are spaced apart in a second direction that is perpendicular to the first direction, a first channel is formed in the first spacing bar that extends through the first spacing bar in the first direction, a second channel is formed in the second spacing bar that extends through the second spacing bar in the first direction,

the cutting piece is formed into a cutting rope, one end of the cutting rope penetrates through the first channel and then is fixed on the box body, the other end of the cutting rope penetrates through the second channel and then is fixed on the box body, and the cutting rope is configured to cut the side wall, facing the heat conducting structural adhesive, of the first channel, the side wall, facing the heat conducting structural adhesive, of the second channel and the heat conducting structural adhesive under the action of external force.

9. The battery pack according to claim 8, wherein the case is provided with a placement groove, and both ends of the cutting string extend to the placement groove and are fixed in the placement groove.

10. The battery pack of claim 9, further comprising a flap that openably covers the placement slot.

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