CN213026396U - Separator and battery pack - Google Patents

Abstract

The utility model discloses a baffle and a battery pack, which are used for electrically connecting a first battery and a second battery, wherein the baffle comprises an upper insulating plate, an upper substrate, a lower insulating plate and a lower substrate which are sequentially stacked and fixed from top to bottom; the upper insulating plate is provided with an upper fixing hole, the upper substrate is provided with an upper mounting hole, the lower insulating plate is provided with a lower fixing hole, and the lower substrate is provided with a lower mounting hole; the separator further comprises a connecting piece used for electrically connecting the first battery and the second battery, the connecting piece comprises a bottom plate and a convex column positioned on the bottom plate, the bottom plate is positioned on the upper insulating plate, and the convex column penetrates through the upper fixing hole, the upper mounting hole and the lower fixing hole and is fixed in the lower mounting hole to seal the lower mounting hole. The first battery and the second battery are electrically connected by using the partition plate, so that the battery pack is more compact in structure and more convenient to connect.

Description

Separator and battery pack

Technical Field

The utility model relates to a battery field especially relates to a baffle and group battery.

Background

With the reduction of world energy and the increasing severity of environmental pollution, new energy vehicles are increasingly emphasized by countries in the world, and the new energy vehicles are increasingly diversified and have large power, that is, the requirements on the voltage and the capacity of a used battery are increasingly high.

The battery pack of the new energy automobile commonly available on the market is usually formed by externally connecting a plurality of single batteries in series. In view of the requirement of an external series structure, a space of about 40 mm needs to be reserved between two single cells, so that the space in the battery pack is occupied, and the space utilization rate in the battery pack is reduced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the utility model provides a baffle and group battery.

A separator is used for electrically connecting a first battery and a second battery and comprises an upper insulating plate, an upper substrate, a lower insulating plate and a lower substrate which are sequentially laminated and fixed from top to bottom; the upper insulating plate is provided with an upper fixing hole, the upper substrate is provided with an upper mounting hole, the lower insulating plate is provided with a lower fixing hole, and the lower substrate is provided with a lower mounting hole; the separator further comprises a connecting piece used for electrically connecting the first battery and the second battery, the connecting piece comprises a bottom plate and a convex column positioned on the bottom plate, the bottom plate is positioned on the upper insulating plate, and the convex column penetrates through the upper fixing hole, the upper mounting hole and the lower fixing hole and is fixed in the lower mounting hole to seal the lower mounting hole.

Furthermore, the upper insulating plate is also provided with a groove matched with the bottom plate in shape, and the bottom plate is fixed in the groove.

Further, the first battery comprises a first shell, the second battery comprises a second shell, an upper installation part used for installing the first shell is arranged on one side, away from the lower insulation plate, of the upper substrate, and a lower installation part used for installing the second shell is arranged on one side, away from the lower insulation plate, of the lower substrate.

Further, the upper mounting part is an annular groove or an annular step formed on the edge of the upper substrate, and/or the lower mounting part is an annular groove or an annular step formed on the edge of the lower substrate.

Further, the first shell is welded to the upper mounting portion, and the second shell is welded to the lower mounting portion.

Further, the material of the lower insulating plate is ceramic.

Further, the lower mounting plate comprises a protruding portion extending away from the upper substrate, and the mounting hole is located on the protruding portion.

Furthermore, the upper substrate, the lower insulating plate and the lower substrate are welded and fixed in sequence.

Further, the convex column is welded in the lower mounting hole.

The utility model provides a battery pack, includes first battery, second battery and baffle, first battery reaches the second battery is located respectively the both sides of baffle, first battery includes that first utmost point group and cover are located first casing on the first utmost point group, the second battery includes that second utmost point group and cover are located second casing on the second utmost point group, first casing is fixed in go up the installation department, the second casing is fixed in lower installation department, first utmost point group with second utmost point group passes through the connecting piece electricity is connected.

The utility model provides a baffle, can the direct electric connection first battery reaches the second battery compares in common outside series structure, and the operation is simpler, and the group battery structure of connecting formation by this baffle is compacter.

Drawings

Fig. 1 is an exploded perspective view of a preferred embodiment of the battery pack of the present invention.

Fig. 2 is an exploded perspective view of the separator of fig. 1.

Fig. 3 is a perspective assembly view of the separator plate of fig. 2.

Fig. 4 is a cross-sectional view of the separator plate of fig. 3 taken along line IV-IV.

Fig. 5 is a schematic view of another embodiment of the separator of fig. 4.

Fig. 6 is a perspective assembly view of the battery pack of fig. 1.

Fig. 7 is a sectional view of the overall battery pack of fig. 6 taken along VII-VII.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" 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" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, a battery pack 100 includes a first battery 10, a second battery 20, and a separator 30 for connecting the first battery 10 and the second battery 20.

The first battery 10 includes a positive cover plate 11, a first positive connection sheet 12, a first positive protection sheet 13, a first upper side plate 14, a first electrode group 15, a first lower side plate 16, a first negative protection sheet 17, a first negative connection sheet 18, and a first case 19. The first upper side plate 14 and the first lower side plate 16 are made of an insulating material and are respectively fixed to two ends of the first pole group 15, so that the first pole group 15 can be prevented from being worn when being installed in the first housing 19, and the first pole group 15 can be prevented from contacting the partition plate 30 to cause a short circuit. In an embodiment, the first upper side plate 14 and the first lower side plate 16 are made of plastic, so that the plastic has low cost and can play a certain role in buffering.

The second battery 20 includes a negative electrode cover plate 21, a second negative electrode connecting piece 22, a second negative electrode protective sheet 23, a second lower side plate 24, a second electrode group 25, a second upper side plate 26, a second positive electrode protective sheet 27, a second positive electrode connecting piece 28, and a second case 29. The second lower side plate 24 and the second upper side plate 26 are made of an insulating material and are respectively fixed to two ends of the second pole group 25, so that the second pole group 25 can be prevented from being worn when being installed in the second housing 29, and the second pole group 25 can be prevented from contacting the partition plate 30 to cause a short circuit. The second lower side plate 24 and the second upper side plate 26 are made of the same material as the first upper side plate 14 or the first lower side plate 16.

Referring to fig. 2, the spacer 30 includes a connecting member 31, an upper insulating plate 32, an upper substrate 33, a lower insulating plate 34, and a lower substrate 35.

The connecting member 31 is used to electrically connect the first battery 10 and the second battery 20, and includes a bottom plate 311 and a convex pillar 312 located on the bottom plate 311. In one embodiment, the bottom plate 311 is made of copper, the protruding pillar 312 is made of aluminum, and the protruding pillar 312 is fixed on the bottom plate 311 by welding.

The upper insulating plate 32 is provided with a groove 321 and an upper fixing hole 322, the shape of the groove 321 is matched with that of the bottom plate 311, the projection of the upper fixing hole 322 is located in the groove 321, and the upper fixing hole 322 is a through hole.

An upper mounting hole 322 is formed in the upper substrate 33, and the upper mounting hole 322 is a through hole. The upper substrate 33 includes an upper mounting portion 334 for mounting the first housing 19. In one embodiment, the upper mounting portion 334 is an annular step formed on the edge of the upper substrate 33. In other embodiments, the upper mounting portion 334 may be an annular groove or other structure suitable for mounting the first housing 19.

The lower insulating plate 34 is provided with a lower fixing hole 342, and the lower fixing hole 342 is a through hole.

A lower mounting hole 352 is formed in the lower substrate 35, and the lower mounting hole 352 is a through hole. In this embodiment, the lower substrate 35 further includes a protrusion 353 extending in a direction away from the lower insulating plate 34, the lower mounting hole 352 is located on the protrusion 353, and the protrusion 353 is formed to adjust the thickness of the portion of the partition board 30 exposed outside the second case 29 without increasing the thickness of the portion, thereby satisfying the structural requirement. Referring to fig. 5, in another embodiment, the lower substrate 35 is a flat plate structure. Referring to fig. 4, the lower substrate 35 includes a lower mounting portion 354, and the lower mounting portion 354 has the same structure as the upper mounting portion 334.

Referring to fig. 3, when the spacer 30 is assembled, the upper substrate 33, the lower insulating plate 34, and the lower substrate 35 are sequentially stacked and fixed. The upper insulating plate 32, the upper substrate 33, the lower insulating plate 34, and the lower substrate 35 are fixed by gluing or welding, the gluing makes the operation simpler, and the welding can increase the strength of the separator 30 on the premise of ensuring the structural stability.

Fixing the upper insulating plate 32 to the upper substrate 33 at a side away from the lower insulating plate 34, wherein the convex column 312 of the connecting member 31 passes through the upper fixing hole 322, the upper mounting hole 332, and the lower fixing hole 342 in sequence and is fixed in the lower mounting hole 352 to seal the mounting hole 352, and the bottom plate 311 is fixed in the groove 321. The upper insulating plate 32 is made of plastic, and the upper substrate 33 is provided with the upper insulating plate 32, which is beneficial to mounting the connecting piece 31. The mounting hole 352 is sealed to prevent the electrolyte in the first battery 10 and the second battery 20 from leaking from the mounting hole 352. In one embodiment, the post 312 is welded into the lower mounting hole 352.

In one embodiment, the upper substrate 33 and the lower substrate 35 are made of aluminum material, the lower insulating plate 34 is a ceramic plate, and the upper substrate 33 and the lower substrate 35 are welded to both sides of the lower insulating plate 34. On one hand, the ceramic has a good insulation effect, the lower insulation plate 34 is made of the ceramic, so that the insulation requirement can be met, the strength of the partition plate 30 can be increased, and the strength of the partition plate 30 can be further improved in a welding mode; on the other hand, the upper substrate 33, the lower insulating plate 34, and the lower substrate 35 are sequentially fixed by gluing or welding, so that the sealing requirements can be met, and the electrolytes of the first battery 10 and the second battery 20 are isolated from each other to prevent leakage.

Referring to fig. 6 and 7, when the battery pack 100 is assembled, the first pole group 15 fixed with the first upper side plate 14 and the first lower side plate 16 is connected to the separator 30 through the first negative electrode protection sheet 17 and the first negative electrode connecting sheet 18; the second pole group 25 fixed with the second lower side plate 24 and the second upper side plate 26 is connected to the separator 30 through the second positive electrode protection sheet 27 and the second positive electrode connecting sheet 28, and the first pole group 15 and the second pole group 25 are point-connected through the connecting piece 31.

The first casing 19 is sleeved on the first pole group 15 and fixed on the upper mounting part 334, and the end of the first casing 19 abuts against the upper mounting part 334. The upper mounting part 334 is an annular step or an annular groove, and the first housing 19 is embedded in the annular step or the annular groove, so that a better sealing effect can be achieved. In one embodiment, an end of the first housing 19 is fixed to the upper mounting portion 334 by welding.

The second casing 29 is sleeved on the second pole group 25 and fixed on the lower mounting portion 354, and the end of the second casing 29 abuts against the lower mounting portion 354. The lower mounting portion 354 is an annular step or an annular groove, and the second housing 29 is embedded in the annular step or the annular groove, so that a better sealing effect can be achieved. In one embodiment, an end of the second housing 29 is fixed to the lower mounting portion 354 by welding.

Fixing the positive electrode cover plate 11 mounted with the first positive electrode connecting piece 12 and the first positive electrode protecting sheet 13 to one end of the first housing 19 away from the separator 30, wherein the first positive electrode group 15 is connected to the positive electrode cover plate 11 through the first positive electrode connecting piece 12 and the first positive electrode protecting sheet 13; the negative electrode cover plate 21 with the second negative electrode connecting piece 22 and the second negative electrode protecting sheet 23 mounted thereon is fixed to one end of the second casing 29 far away from the separator 30, and the second electrode group 25 is connected to the negative electrode cover plate 21 through the second negative electrode connecting piece 22 and the second negative electrode protecting sheet 23. In one embodiment, the first case 19 is welded to the positive electrode cover plate 11, and the case 29 is welded to the negative electrode cover plate 21.

The positive electrode cover plate 11, the case 19, and the cover plate 30 together form a first sealed space (not shown), and the negative electrode cover plate 21, the case 29, and the cover plate 30 together form a second sealed space (not shown), which are separated from each other, so that the electrolyte of the first electrode group 15 and the electrolyte of the second electrode group 25 are separated from each other.

During the manufacturing and using process of the battery pack 100, the first housing 19 will have a positive potential, and the voltage collection of the first battery 10 and the second battery can be completed through the connecting member 31 and the housing 19.

The existing battery pack usually adopts an external series connection structure, and the two battery monomers are usually overlapped by reserving an interval of about 40 millimeters, so that not only is space wasted, but also the operation is relatively complex during overlapping. And the utility model discloses a set up between first battery 10 and the second battery 20 baffle 30, and pass through baffle 30 the connecting piece 31 is realized first battery 10 with electricity is connected between the second battery 20, and the structure is simpler, and the leakproofness is better, in addition, baffle 30 thickness can accomplish about 5 millimeters, for the 40 millimeter interval that external connection needs, has saved the space more than 85%, the inner structure of group battery 100 is compacter.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A separator for electrically connecting a first battery and a second battery, comprising: the partition plate comprises an upper insulating plate, an upper substrate, a lower insulating plate and a lower substrate which are sequentially laminated and fixed from top to bottom; the upper insulating plate is provided with an upper fixing hole, the upper substrate is provided with an upper mounting hole, the lower insulating plate is provided with a lower fixing hole, and the lower substrate is provided with a lower mounting hole; the separator further comprises a connecting piece used for electrically connecting the first battery and the second battery, the connecting piece comprises a bottom plate and a convex column positioned on the bottom plate, the bottom plate is positioned on the upper insulating plate, and the convex column penetrates through the upper fixing hole, the upper mounting hole and the lower fixing hole and is fixed in the lower mounting hole to seal the lower mounting hole.

2. The separator of claim 1, wherein: the upper insulating plate is further provided with a groove matched with the bottom plate in shape, and the bottom plate is fixed in the groove.

3. The separator of claim 1 wherein: the first battery comprises a first shell, the second battery comprises a second shell, the upper substrate is far away from one side of the lower insulating plate, the upper mounting portion of the first shell is installed, the lower mounting portion of the second shell is installed, and the lower mounting portion of the lower insulating plate is installed.

4. The separator of claim 3 wherein: the upper mounting part is an annular groove or an annular step formed on the edge of the upper substrate, and/or the lower mounting part is an annular groove or an annular step formed on the edge of the lower substrate.

5. The separator of claim 4 wherein: the first shell is welded to the upper mounting portion, and the second shell is welded to the lower mounting portion.

6. The separator of claim 1 wherein: the lower insulating plate is made of ceramic.

7. The separator of claim 1 wherein: the lower substrate comprises a protruding part extending in the direction far away from the upper substrate, and the mounting hole is located on the protruding part.

8. The separator of claim 1 wherein: the upper substrate, the lower insulating plate and the lower substrate are welded and fixed in sequence.

9. The separator of claim 2 wherein: the convex column is welded in the lower mounting hole.

10. A battery pack comprising a first cell, a second cell and the separator of any one of claims 1 to 9, wherein: the first battery reaches the second battery is located respectively the both sides of baffle, the first battery includes that first utmost point group and cover are located first casing on the first utmost point group, the second battery includes that second utmost point group and cover are located second casing on the second utmost point group, first casing is fixed in the last installation department of upper substrate, the second casing is fixed in the lower installation department of infrabasal plate, first utmost point group with second utmost point group passes through the connecting piece electricity is connected.

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