CN218896764U - Battery pack - Google Patents

Abstract

The present utility model provides a battery pack including: a housing; a dividing beam assembly disposed within the housing and dividing a space within the housing into at least one battery immersion space and at least one electrical space, the battery immersion space being filled with an immersion liquid; a battery assembly disposed within the battery immersion space; an electrical component disposed within the electrical space; and the electric connection assembly penetrates through the separation beam assembly and is used for connecting the battery assembly and the electric assembly. Separate the space in the roof beam subassembly to the casing through separating, form mutually independent battery immersion space and electrical space, the immersion liquid is filled in battery immersion space to with battery pack heat transfer, promote the heat transfer effect of battery pack department in the battery package, and reduce the quantity of immersion liquid in the battery package, reduce cost when lightening battery package weight.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

In the related art, the heat exchange effect on the battery assembly in the battery pack is improved by arranging the immersion liquid in the battery pack, and the filling amount of the immersion liquid is large, so that the weight of the battery pack is overlarge, the cost is overlarge, and the electric components are required to be insulated and protected.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery pack, in which a battery immersion space is formed, in which an oil immersion liquid is filled, and the heat exchange effect at a battery assembly is improved by the immersion liquid, so that the amount of the immersion liquid is reduced.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a battery pack, comprising: a housing; a dividing beam assembly disposed within the housing and dividing a space within the housing into at least one battery immersion space and at least one electrical space, the battery immersion space being filled with an immersion liquid; a battery assembly disposed within the battery immersion space; an electrical component disposed within the electrical space; and the electric connection assembly penetrates through the separation beam assembly and is used for connecting the battery assembly and the electric assembly.

In some embodiments of the utility model, the spacer beam assembly comprises: a first beam and a second beam, the first beam disposed on top of the second beam, the electrical connection assembly comprising: the first electric connecting piece passes through the first beam, and the second electric connecting piece passes through the second beam.

In some embodiments of the utility model, an outer surface of the first electrical connector is provided with an insulator comprising: the fixing part is fixed with the first electric connecting piece, and the flange part is in sealing fit with the first beam.

In some embodiments of the present utility model, at least one group of first through holes through which the first electrical connectors pass is formed on the first beam, the number of each group of first through holes is two, the flange portion is attached to a beam wall around at least one of the first through holes, and a first sealing structure is provided between the flange portion and the beam wall.

In some embodiments of the present utility model, the fixing portion and the flange portion are injection molded pieces, and the first electrical connector is formed in an integral structure with the fixing portion and the flange portion in an insert molding process.

In some embodiments of the utility model, the second beam comprises: the sealing device comprises a beam body and a sealing box, wherein a concave part is formed in the top surface of the beam body, the concave part is opened upwards, the first beam seals the open end of the concave part, the sealing box is matched with the concave part and is positioned in the concave part, and the second electric connecting piece penetrates through the sealing box.

In some embodiments of the present utility model, the sealing box and the first beam are filled with a sealant, wherein the top surface of the first beam has a top surface sealant filling opening and the bottom surface has a bottom surface sealant filling opening, the sealing box has a sealing box sealant filling opening, and the bottom surface sealant filling opening corresponds to the sealing box sealant filling opening.

In some embodiments of the present utility model, the first beam is open at both ends to enable the fixing paste poured into the first beam to flow to both ends of the first beam and to be sealed and fixed with the corresponding wall surfaces of the housing, and the sealing case is open at both ends to enable the fixing paste poured into the sealing case to flow to both ends of the sealing case and to be sealed and fixed with the two opposite wall surfaces of the recess.

In some embodiments of the utility model, the battery assembly has an end plate and a battery, the end plate is sandwiched between the battery and the second beam, a top surface of the end plate is not higher than a bottom surface of the recess, and the second electrical connector is located on an upper surface of the battery assembly, and an end portion of the second electrical connector is bent downward and a bent portion penetrates the sealing case.

In some embodiments of the utility model, the second beam is fixed integrally with the housing to form a fixed beam, and the first beam is fitted to the top of the second beam to form a movable beam; or the first electric connecting piece is a strong electric connecting piece, and the second electric connecting piece is a weak electric connecting piece.

Compared with the prior art, the frame has the following advantages:

separate the space in the roof beam subassembly to the casing through separating, form mutually independent battery immersion space and electrical space, the immersion liquid is filled in battery immersion space to with battery pack heat transfer, promote the heat transfer effect of battery pack department in the battery package, and reduce the quantity of immersion liquid in the battery package, reduce cost when lightening battery package weight.

And sealant is filled in the first beam and the sealing box, so that the sealing effect between the separation beam and the shell can be improved, and the safety of the battery pack is improved. Meanwhile, the second electric connecting piece can be led out after being bent downwards at the end part position in the battery immersion space, so that the space utilization rate in the vertical direction can be improved, the distance between the battery assembly and the upper cover plate of the shell is reduced, and the filling amount of immersion liquid is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of an assembly of a housing according to an embodiment of the present utility model;

fig. 2 is a schematic diagram illustrating the cooperation between a battery assembly and a housing according to an embodiment of the utility model;

FIG. 3 is a schematic view illustrating the mating of a battery assembly with a second beam according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating the fitting of the insulating member and the first electrical connector according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a seal box according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a first beam according to an embodiment of the present utility model.

Reference numerals illustrate:

battery pack 100,

A housing 10, an electrical space 11, a battery immersion space 12,

Dividing beam assembly 20, first beam 21, top surface glue fill port 211, second beam 22, beam body 221, recess 2211, seal box 222, seal box glue fill port 2221,

Battery module 30, end plate 31, battery 32,

The first electrical connector 41, the second electrical connector 42, the insulator 43, the fixing portion 431, the flange portion 432, the first sealing structure 433, and the sealing strip 50.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The battery pack 100 according to the embodiment of the present utility model includes: the housing 10, the dividing beam assembly 20, the battery assembly 30, the electrical assembly and the electrical connection assembly.

Wherein the partition beam assembly 20 is disposed in the housing 10 and partitions a space in the housing 10 into at least one battery immersion space 12 and at least one electric space 11, the battery immersion space 12 is filled with an immersion liquid, the battery assembly 30 is disposed in the battery immersion space 12, the electric assembly is disposed in the electric space 11, and the electric connection assembly penetrates the partition beam assembly 20 and is used for connecting the battery assembly 30 and the electric assembly.

Wherein, the electricity coupling assembling wears to locate and separates beam assembly 20 setting, can be connected battery assembly 30 and electric assembly electricity through the electricity coupling assembling, wears to establish the mode of setting in addition and little to separating beam assembly 20's structure influence, can reduce the influence to battery immersion space 12 and electric space 11's separation effect when guaranteeing the connection effect.

It will be appreciated that by providing a dividing beam assembly 20 within the housing 10, the space within the housing 10 may be divided by the dividing beam assembly 20 to form the battery immersion space 12 and the electrical space 11. The immersion liquid is filled in the battery immersion space 12 to exchange heat with the battery assembly 30 through the immersion liquid to enhance the heat exchange effect on the battery assembly 30.

The immersion liquid in the application is only filled in the battery immersion space 12 with a large heating value, and the immersion liquid is not arranged in the electric space 11, so that the electric components in the electric space 11 do not need to be insulated and protected, the consumption of the immersion liquid in the battery pack 100 can be reduced, and the cost of the battery pack 100 is reduced while the weight of the battery pack 100 is reduced.

Referring to fig. 2, the number of the separation beam assemblies 20 is two, and the two separation beam assemblies 20 extend in the width direction of the case 10 and are sequentially spaced apart in the length direction of the case 10, thereby dividing the space of the case 10 into three spaces sequentially spaced apart in the length direction of the case 10. Wherein the battery assembly 30 is disposed in a space located in the middle, i.e., the battery immersion space 12, the spaces on both sides of the battery immersion space 12 may be configured as the electric space 11.

According to the battery pack 100 of the embodiment of the utility model, the space in the shell 10 is partitioned by the partition beam assembly 20 to form the battery immersion space 12 and the electric space 11 which are mutually independent, and the immersion liquid is filled in the battery immersion space 12 to exchange heat with the battery assembly 30, so that the heat exchange effect of the battery assembly 30 in the battery pack 100 is improved, the consumption of the immersion liquid in the battery pack 100 is reduced, the weight of the battery pack 100 is reduced, and the cost is reduced.

As shown in fig. 1, in some embodiments of the present utility model, the dividing beam assembly 20 includes: a first beam 21 and a second beam 22, the first beam 21 being arranged on top of the second beam 22. Wherein the second beam 22 is fixedly connected to the housing 10, and the first beam 21 is disposed opposite to the second beam 22 in the vertical direction and on top of the second beam 22.

Wherein, the electrical connection assembly includes: a first electrical connector 41 and a second electrical connector 42, the first electrical connector 41 being threaded through the first beam 21 and the second electrical connector 42 being threaded through the second beam 22.

In one specific embodiment of the present utility model, the first electrical connector 41 is configured as a copper bar, which is the terminal of the battery assembly 30; the second electrical connector 42 is configured as a sampling harness that can be electrically connected with the electrical components within the electrical space 11. The specific structure and function of the first electrical connector 41 and the second electrical connector 42 are not particularly limited herein. The present application describes an example in which the first electrical connector 41 is configured as a copper bar and the second electrical connector 42 is configured as a sampling harness.

As shown in fig. 4, in some embodiments of the utility model, the outer surface of the first electrical connector 41 is provided with an insulator 43. It can be appreciated that the first electrical connector 41 is disposed through the first beam 21, and by disposing the insulating member 43 on the outer surface of the first electrical connector 41, insulation protection can be performed between the first electrical connector 41 and the first beam 21, so as to prevent the first electrical connector 41 from being electrically connected with the first beam 21, and improve reliability and safety of the battery pack 100.

Referring to fig. 4, the insulator 43 includes: the fixing portion 431 is fixed to the first electrical connector 41, and the flange portion 432 is sealed and bonded to the first beam 21, and the fixing portion 431 and the flange portion 432 are fixed to each other.

Specifically, the fixing portion 431 is fixedly connected to the first electrical connector 41, so as to prevent the first electrical connector 41 from moving relative to the fixing portion 431, and improve the reliability of the fitting between the first electrical connector 41 and the insulating member 43. Meanwhile, the flange 432 is in sealing fit with the first beam 21, so that the immersion liquid in the battery immersion space 12 is prevented from entering the electric space 11 through the position where the first electric connector 41 penetrates through the first beam 21, and the safety of the battery pack 100 is improved.

In some embodiments of the utility model, a flange portion 432 is provided at a side surface of the first beam 21 facing away from the battery immersion space 12 to be in positioning engagement with the first beam 21 by the flange portion 432. The flange 432 may abut against the wall surface of the first beam 21 to be in a limit fit with the first beam 21.

In some embodiments of the present utility model, at least one set of first through holes through which the first electrical connector 41 passes is formed on the first beam 21, the number of each set of first through holes is two, the flange portion 432 is attached to the beam wall around the at least one first through hole, and the first sealing structure 433 is disposed between the flange portion 432 and the beam wall.

It should be noted that, the first beam 21 is configured as a hollow beam structure, two first through holes in each group are used for passing through one first electrical connector 41, two through holes are respectively disposed on two opposite side walls of the hollow beam structure, and the two through holes are disposed opposite to each other. Wherein, by constructing the first beam 21 as a hollow beam structure, the weight of the first beam 21 can be reduced, thereby realizing a lightweight design satisfying the battery pack 100.

As shown in fig. 4, the flange portion 432 is provided with a first seal structure 433, and when the flange portion 432 is fitted to the beam wall, the first seal structure 433 is interposed between the flange portion 432 and the beam wall to further improve the sealability between the insulator 43 and the first beam 21.

In some embodiments of the present utility model, the first sealing structure 433 is configured as a sealing ring, which is designed around the through hole (i.e., the hole structure through which the first electrical connector 41 is inserted) formed by the flange portion 432 in the circumferential direction, thereby further improving the sealing effect between the insulating member 43 and the first beam 21.

In some embodiments of the present utility model, the fixing portion 431 and the flange portion 432 are injection molded, and the first electrical connector 41 is formed as an integral structure with the fixing portion 431 and the flange portion 432 during the injection molding process, so as to reduce the difficulty in matching the first electrical connector 41 with the insulating member 43.

It is understood that when the fixing portion 431 and the flange portion 432 are injection-molded with the first electrical connector 41, a sealing effect between the fixing portion 431 and the first electrical connector 41, and between the flange portion 432 and the first electrical connector 41 can be ensured.

In some embodiments of the present utility model, the insulator 43 may be attached to the first beam 21 by means of an adhesive or a connector.

As shown in fig. 1, in some embodiments of the utility model, the second beam 22 includes: a beam body 221 and a seal box 222.

Wherein the top surface of the beam body 221 is formed with a recess 2211, the recess 2211 is opened upward, the first beam 21 closes the open end of the recess 2211, and the seal box 222 is matched with the recess 2211 and is located in the recess 2211, and the second electrical connector 42 penetrates the seal box 222.

Referring to fig. 1, 3 and 5, a recess 2211 is formed at the top of the beam body 221, the recess 2211 is used for installing the sealing box 222, and the sealing box 222 is matched with the shape and size of the recess 2211, so as to prevent the sealing box 222 from forming an excessive gap at the recess 2211 after being installed in the recess 2211 to affect the tightness of the second beam 22.

In a further embodiment of the present utility model, the sealing box 222 and the first beam 21 are filled with sealant, wherein the top surface of the first beam 21 has a top surface sealant filling port 211 and the bottom surface has a bottom surface sealant filling port (not shown), the sealing box 222 has a sealing box sealant filling port 2221, and the bottom surface sealant filling port corresponds to the sealing box sealant filling port 2221.

The first beam 21 and the sealing box 222 may be filled with a sealant, and the sealant may promote the tightness of the first beam 21 (hollow beam structure) and the sealing box 222, so as to ensure the separation effect of the separation beam assembly 20 on the space in the housing 10, and prevent the immersion liquid in the battery immersion space 12 from entering the electrical space 11.

It should be noted that, the sealant poured into the first beam 21 needs to be poured into the sealing box 222, so that the bottom surface sealant pouring opening and the sealing box sealant pouring opening 2221 need to be relatively arranged, and the position of the top surface sealant pouring opening 211 can be designed according to the design requirement, and the top surface sealant pouring opening does not need to be just opposite to the bottom surface sealant pouring opening.

In a further embodiment of the present utility model, both ends of the first beam 21 are opened so that the fixing paste poured into the first beam 21 can flow to both ends of the first beam 21 and be sealed and fixed with the corresponding wall surfaces of the housing 10, and both ends of the sealing case 222 are opened so that the fixing paste poured into the sealing case 222 can flow to both ends of the sealing case 222 and be sealed and fixed with the two opposite wall surfaces of the recess 2211. Thereby, the sealing effect between the seal case 222 and the beam body 221, the first beam 21 and the housing 10 can be enhanced, and the immersion liquid in the battery immersion space 12 can be prevented from entering the electric space 11.

It can be appreciated that during the assembly process of the separation beam, the first beam 21 and the second beam 22 are assembled and matched, and sealant is filled into the first beam 21 through the top surface sealant filling port 211, and because the sealant filling port 2221 of the sealant box 222 is opposite to the bottom surface sealant filling port, the sealant filled into the first beam 21 can enter the sealant box 222 through the bottom surface sealant filling port and the sealant box sealant filling port 2221, and seal with the second electrical connector 42 penetrating through the sealant box 222.

Further, after the sealant is filled into the sealing box 222, the sealant can be in sealing fit with the beam body 221 from the open ends of the two sides of the sealing box 222, so as to improve the sealing effect of the sealing box 222 and the beam body 221.

Meanwhile, after the sealing compound fills the sealing box 222, the sealing compound will be further filled in the hollow space of the first beam 21. The sealant in the first beam 21 may be in sealing engagement with the insulating member 43 to enhance the sealing property of the first electrical connector 41 where the first beam 21 is penetrated, and the sealant may be in adhesive engagement with the housing 10 from the open ends of both sides of the first beam 21 to seal between both ends of the first beam 21 and the housing 10.

As shown in fig. 3, in some embodiments of the present utility model, the battery assembly 30 has an end plate 31 and a battery 32, the end plate 31 is sandwiched between the battery 32 and the second beam 22, the top surface of the end plate 31 is not higher than the bottom surface of the recess 2211, and the second electrical connector 42 is located on the upper surface of the battery assembly 30, and the end of the second electrical connector 42 is bent downward and the bent portion penetrates the seal case 222.

When the top surface of the end plate 31 is not higher than the bottom surface of the recess 2211, the end plate 31 may be sufficiently recessed from the second connection member so that the second connection member is disposed through the second beam 22.

Referring to fig. 3, the second electrical connector 42 may be bent downward at the end of the battery immersion space 12 to be led out, so that the space utilization in the vertical direction may be improved, and the distance between the battery assembly 30 and the upper cover plate of the housing 10 may be reduced, thereby reducing the filling amount of the immersion liquid.

In some embodiments of the present utility model, the first beam 21 is fixed to the housing 10 to form a fixed beam, and the second beam 22 is assembled to the top of the first beam 21 to form a movable beam; or the first electrical connector 41 is a strong electrical connector and the second electrical connector 42 is a weak electrical connector.

In some embodiments of the present utility model, the battery pack 100 further includes a sealing strip 50, where the sealing strip 50 is disposed on top of the first beam 21 and is in sealing engagement with the top wall of the housing 10, so as to improve the sealing effect between the separation beam assembly 20 and the housing 10, and ensure the separation effect of the separation beam assembly 20 on the space in the housing 10.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A battery pack, comprising:

a housing (10);

a dividing beam assembly (20), the dividing beam assembly (20) being disposed within the housing (10) and dividing a space within the housing (10) into at least one battery immersion space (12) and at least one electrical space (11), the battery immersion space (12) being filled with an immersion liquid;

-a battery assembly (30), the battery assembly (30) being arranged within the battery immersion space (12);

an electrical component arranged within the electrical space (11);

and the electric connection assembly penetrates through the separation beam assembly (20) and is used for connecting the battery assembly (30) and the electric assembly.

2. The battery pack according to claim 1, wherein the separator beam assembly (20) includes: a first beam (21) and a second beam (22), the first beam (21) being arranged on top of the second beam (22), the electrical connection assembly comprising: the first electric connecting piece (41) and the second electric connecting piece (42), first electric connecting piece (41) wear to establish first roof beam (21), second electric connecting piece (42) wear to establish second roof beam (22).

3. The battery pack according to claim 2, wherein an outer surface of the first electrical connector (41) is provided with an insulator (43), the insulator (43) comprising: a fixing portion (431) and a flange portion (432), wherein the fixing portion (431) is fixed with the first electrical connector (41), and the flange portion (432) is in sealing fit with the first beam (21).

4. A battery pack according to claim 3, wherein the first beam (21) has at least one set of first through holes through which the first electrical connectors (41) pass, the number of each set of first through holes being two, the flange portion (432) being attached to a beam wall around at least one of the first through holes, and a first sealing structure (433) being provided between the flange portion (432) and the beam wall.

5. The battery pack (100) according to claim 4, wherein the fixing portion (431) and the flange portion (432) are injection-molded pieces, and the first electrical connection member (41) is formed in an integral structure with the fixing portion (431) and the flange portion (432) in an insert-molding process.

6. The battery pack according to claim 2, wherein the second beam (22) includes: the beam body (221) and seal box (222), the top surface of beam body (221) is formed with concave part (2211), concave part (2211) is upwards opened, first roof beam (21) seal the open end of concave part (2211), seal box (222) with concave part (2211) matches and is located in concave part (2211), second electrical connection piece (42) wears to establish seal box (222).

7. The battery pack according to claim 6, wherein the sealing box (222) and the first beam (21) are filled with sealing glue, wherein the top surface of the first beam (21) is provided with a top surface glue filling opening (211) and the bottom surface is provided with a bottom surface glue filling opening, the sealing box (222) is provided with a sealing box glue filling opening (2221), and the bottom surface glue filling opening corresponds to the sealing box glue filling opening (2221).

8. The battery pack according to claim 7, wherein both ends of the first beam (21) are opened so that the fixing paste poured into the first beam (21) can flow to both ends of the first beam (21) and be sealed and fixed with the corresponding wall surfaces of the case (10), and both ends of the sealing case (222) are opened so that the fixing paste poured into the sealing case (222) can flow to both ends of the sealing case (222) and be sealed and fixed with the two opposite wall surfaces of the recess (2211).

9. The battery pack according to claim 6, wherein the battery assembly (30) has an end plate (31) and a battery (32), the end plate (31) is sandwiched between the battery (32) and the second beam (22), a top surface of the end plate (31) is not higher than a bottom surface of the recess (2211), and the second electrical connector (42) is located on an upper surface of the battery assembly (30), an end portion of the second electrical connector (42) is bent downward and a bent portion penetrates the sealing case (222).

10. The battery pack according to claim 2, wherein the second beam (22) is fixed integrally with the case (10) to form a fixed beam, and the first beam (21) is fitted to the top of the second beam (22) to form a movable beam; or alternatively

The first electrical connector (41) is a strong electrical connector, and the second electrical connector (42) is a weak electrical connector.

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