CN219321549U

CN219321549U - Battery device and battery pack thereof

Info

Publication number: CN219321549U
Application number: CN202320440579.8U
Authority: CN
Inventors: 邓风; 杨帆; 田瑞生; 尹旭铖
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-07-07
Anticipated expiration: 2033-03-09

Abstract

The utility model discloses a battery device and a battery pack thereof, wherein the battery pack is formed by integrating a separation beam and a plurality of battery core units into an assembly body; the plurality of battery cells are sequentially stacked along the second direction, the separation beam is arranged in an extending mode along the first direction and positioned between two adjacent battery cells, and two ends of the separation beam in the first direction are respectively provided with a detachable connecting part so as to be connected with a side part structure of the battery compartment; the two ends of the separation beam in the first direction are respectively provided with an inner concave part, and the inner concave part penetrates through the body of the separation beam in the second direction and is positioned in the middle of the end in the third direction. The first direction, the second direction and the third direction are respectively perpendicular, and the second direction is the stacking arrangement direction of the battery cell units. By the aid of the scheme, when the battery is out of control, heat transfer of physical spaces at two sides can be achieved through the concave parts at two ends of the separation beam, the blocking effect is achieved based on the separation beam, effective heat transfer in the battery pack can be guaranteed, and use safety is improved.

Description

Battery device and battery pack thereof

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a battery device and a battery pack thereof.

Background

Along with the large-scale development of the battery module, a fixed beam is required to be arranged in the correspondingly increased battery cell bin space so as to enhance the overall strength of the system. For a non-module CIR (Cell in Room) battery system, the space in the cell compartment cannot realize the configuration of the fixed beam. In addition, it is necessary to reasonably control the heat transfer of the physical space on both sides of the beam to improve the safety in use.

In view of this, there is a need for structural optimization of the in-box separator of the battery device to improve the use safety.

Disclosure of Invention

The purpose of this application is to provide a battery device and group battery thereof, improves the equipment manufacturability of dividing the roof beam through structural optimization, provides good technical guarantee for promoting the security of battery device.

The battery pack is used for being assembled in a battery compartment of a battery device, and is formed by integrating a separation beam and a plurality of battery cells into an assembly body; specifically, a plurality of electric core units are sequentially stacked along a second direction, the separation beam is arranged in an extending mode along the first direction and is positioned between two adjacent electric core units, and two ends of the separation beam in the first direction are respectively provided with a detachable connecting part so as to be connected with a side part structure of the battery compartment; the two ends of the separation beam in the first direction are respectively provided with an inner concave part, the inner concave part penetrates through the body of the separation beam in the second direction and is positioned in the middle of the end in the third direction; the first direction, the second direction and the third direction are respectively vertical, and the second direction is the stacking arrangement direction of the battery cell units.

Compared with the prior art, the technical scheme has the following advantages: based on the structural design integrated with the separation beam, the battery cell unit is integrated with the battery cell unit to form an assembly body and then is arranged in the battery compartment of the battery box body, and the separation beam is detachably connected with the side part structure of the battery compartment. The arrangement fully utilizes the space in the battery compartment to realize the assembly of the separation beam and the battery cell unit, and provides reliable supporting force for the longitudinal beam of the box body frame on the basis of not occupying the space of the dimension in the second direction, thereby improving the bearing capacity of the extrusion and collision weak area of the box body frame and effectively avoiding the safety risk caused by the deformation of the battery cell; meanwhile, based on the detachable connection relation of the separation beams, the overhaul and maintenance operations can be further conveniently performed. In addition, when the battery is out of control, heat transfer in the physical space at two sides can be realized through the concave parts at two ends of the separation beam, the blocking effect is obtained based on the separation beam, the effective transfer of heat in the battery pack is ensured, and the use safety is further improved.

Drawings

Fig. 1 is an exploded view showing the assembly relationship of a battery device according to an embodiment;

FIG. 2 is a schematic diagram of the assembled relationship of the battery pack shown in FIG. 1;

fig. 3 is a schematic structural view of a battery device according to an embodiment;

FIG. 4 is a diagram of an assembly relationship of the spacer beams according to the embodiments;

FIG. 5 is a schematic view of a spacer beam according to an embodiment;

FIG. 6 is an A-direction view of the spacer beam shown in FIG. 5;

fig. 7 is an enlarged view of a portion B of fig. 6;

FIG. 8 is a schematic view of the bottom assembly relationship of the spacer beams shown in FIG. 6;

fig. 9 is an enlarged schematic view of a portion C of fig. 2.

In the figure:

the battery device 100, the box frame 10, the longitudinal beams 101, the inner longitudinal beams 102, the battery pack 20, the battery cell unit 1, the partition beam 2, the concave portion 21, the first glue groove 22, the second glue groove 23, the adapter 3, the fastener penetrating opening 31, the positioning hole 32, the threaded fastener 4, the positioning pin 5, the battery compartment 30, the cold plate 40 and the conductive row 50.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments.

Without loss of generality, the embodiment of the present application will be described in detail with respect to the implementation of the partition beams in the battery compartment, based on the battery device 100 shown in fig. 1. It should be understood that the specific implementation of other functional components such as the battery cell unit of the battery device 100 may be implemented using the prior art, and the technical solutions claimed in the present application are not limited in nature.

Referring to fig. 1, an exploded view of an assembly relationship of a battery device according to the present embodiment is shown.

The battery device 100 includes a case and a battery pack 20, and only the case frame 10 is shown in fig. 1 for clarity of illustration of the assembled relationship of the battery pack 20. Four battery packs 20 are arranged in an array in a battery compartment 30 formed in a case, i.e., two rows and two columns as shown in the drawing. The plurality of battery cells 1 of each battery pack 20 are sequentially stacked and arranged, and the bottom of the case frame 10 is provided with a cold plate (not shown) to exchange heat with the battery pack 20 and remove heat generated by operation.

For the sake of clarity in describing the relative positional relationship between the respective structures and the structures, herein, the longitudinal direction of the battery cell 1 is defined as a first direction X, the stacking direction of the battery cell 1 is defined as a second direction Y, the first direction X and the second direction Y, that is, the array arrangement direction of the battery packs 20, and the direction perpendicular to the array arrangement plane of each battery pack is defined as a third direction Z, which is perpendicular to the first direction X and the second direction Y, respectively.

Referring to fig. 1 and 2, fig. 2 is a schematic diagram illustrating an assembly relationship of the battery pack shown in fig. 1. In this embodiment, the separation beam 2 is disposed along the first direction X, located between two adjacent battery cells 1 of the battery pack 20, and integrated with each battery cell 1 into an assembly, and then the battery pack 20 is assembled in the battery compartment 30. Wherein, the two ends of the separation beam 2 in the first direction X are respectively connected with the side structure of the battery compartment 30, and the separation beam 2 is detachably connected with the side structure of the battery compartment 30, so as to facilitate assembly operation. Referring to fig. 3 and 4, fig. 3 is a schematic structural view of a battery device according to an embodiment, in which the stringers of the box frame are not shown, and fig. 4 is an assembly relationship diagram of the partition beams according to an embodiment.

Therefore, the space in the battery compartment can be fully utilized to realize the assembly of the separation beam and the battery cell unit, reliable supporting force is provided for the longitudinal beam 101 of the box body frame 10 on the basis of not occupying the size space in the second direction, the bearing capacity of the extrusion and collision weak area of the box body frame 10 is improved, and the safety risk caused by the deformation of the battery cell can be effectively avoided. In addition, based on the detachable connection relation of the partition beams 2, the overhaul and maintenance operations can be further facilitated.

It should be noted that, for the battery pack 20, the specific arrangement position of the partition beams 2 between the respective battery cells 1 may be determined according to the overall design requirements of the actual product, and is not limited to the relative position of the partition beams 2 in the second direction Y shown in the drawings; in other words, the partition beams 2 may be disposed in the crush and impact weak areas of the box frame 10 in a targeted manner to fully exert their supporting and carrying capacities.

As shown in fig. 2, the battery pack 20 in the present embodiment is integrally provided with one partition beam 2. In other specific implementations, each battery pack 20 may be configured with a plurality of separation beams 2 as required, and are disposed between the battery cells 1 at intervals along the second direction Y, so as to further improve the bearing capacity, and meet the trend requirement of the large-scale development of the battery module.

In addition, the separation beam 2 separates the battery cell units 1 of the battery pack 20, namely, the physical space of the corresponding battery bin 30 is divided, and when the batteries are out of control, the separation beam 2 can effectively cut off the heat transfer of the battery and the battery connection surface; in the present embodiment, the partition beam 2 has concave portions 21 at both ends in the first direction X, respectively, the concave portions 21 penetrating the body of the partition beam 2 in the second direction Y, and the concave portions 21 being located at the middle of the ends in the third direction Z. In this way, when the battery is out of control, the heat transfer of the physical spaces at the two sides can be realized through the concave parts 21 at the two ends of the separation beam 2, the blocking and dredging effects can be obtained based on the separation beam, and the effective heat transfer in the battery pack can be ensured.

Please refer to fig. 5, which is a schematic diagram of the separation beam according to the present embodiment. In the present embodiment, in the third direction Z, the length dimension L of the concave portion 21 may be 30% to 80% of the height dimension H of the partition beam 2; the depth dimension W of the recess 21 may be 10mm-45mm in the first direction X.

On this basis, as shown in fig. 3, the conductive bars 50 at two ends of the separation beam 2 can be connected with the adjacent battery cell units 1 through the concave parts 21, so as to realize high-low voltage series-parallel connection wiring of the battery cells. Of course, in the case of arranging the conductive bars 50 in the concave portions 21, it is also necessary to satisfy the functional requirement of achieving heat transfer in the physical space of both sides.

For the integrated battery pack 20, the fixed connection between the partition beams 2 and the adjacent battery cells 1 may be implemented in various ways. For example, a reliable basic assembly relation can be obtained by adopting a mechanical structure, and the battery cell 1 adjacent to two sides can be fixed by adopting a gluing mode.

In this embodiment, the partition beam 2 is fixed by gluing.

In order to further improve the reliable connection between the dividing beam 2 and the bottom structure of the battery compartment, the end faces of the dividing beam 2 opposite to the bottom structure of the battery compartment are provided with first glue grooves 22 in the third direction Z so as to accommodate the glue to form a glue layer thickness that can be reliably fixed with the bottom structure of the case. Referring to fig. 6, 7 and 8, fig. 6 is an a-direction view of the dividing beam shown in fig. 5, fig. 7 is an enlarged view of a portion B of fig. 6, and fig. 8 is a schematic view of a bottom assembly relationship of the dividing beam shown in fig. 6.

The bottom structure of the battery compartment of this embodiment is a cold plate 40, and the adhesive preferably is a heat conductive structural adhesive to rapidly transfer heat to the cold plate. Further, in the third direction Z, the two opposite sides of the opposite ends of the separation beam 2 and the bottom structure of the battery compartment are respectively provided with a second glue groove 23, so that the adhesive overflowed from the first glue groove 22 can be contained, the heat dissipation effect to a certain extent is achieved, and meanwhile, the adjacent battery cell supports can be avoided based on the arrangement of the first glue groove 22, so that the overall integration level is improved.

In a specific implementation, the groove depth m of the first glue groove 22 and the groove depth n of the second glue groove 23 may be determined according to actual needs, for example, but not limited to, may be 0.2mm-1mm, and the self strength of the separation beam 2 is not affected on the basis of obtaining the required glue containing space.

For the detachable connection of the partition beam 2 with the side structure of the battery compartment 30, the present embodiment is realized based on the adapter 3 provided on the partition beam 2. Please refer to fig. 2, 3, 4, 5 and 9, wherein fig. 9 is an enlarged schematic diagram of a portion C of fig. 2.

As shown, the adaptor 3 is disposed at an end of the dividing beam 2 and is located at a side of the concave portion 21 away from the first glue groove 22 in the third direction Z; that is, based on the illustrated relative positional relationship, the first glue groove 22 is located at the bottom of the partition beam 2, and the adapter 3 is located at the top of the partition beam, so that the operator can perform the assembling and disassembling operations.

As shown, the partition beam 2 is connected at one end side thereof to the longitudinal beam 101 via the adapter 3, and at the other end side thereof to the inner longitudinal beam 102 of the box frame 10 via the adapter 3, in particular, via the threaded fastener 4, to achieve a corresponding detachable connection.

In this embodiment, two threaded fasteners 4 may be disposed on each adapter 3, and the adapter 3 extends along the second direction Y, and the two fastener insertion openings 31 are spaced apart along the second direction Y, so as to make full use of the assembly space to achieve reliable connection. In other implementations, the number of threaded fasteners 4 configured per adapter 3 may be determined based on actual load requirements, such as, but not limited to, one or more other threaded fasteners 4.

In order to further improve the assembly manufacturability, the fastener penetrating opening 31 on the adapter 3 is an elongated opening to absorb assembly accumulated errors, and the adaptability is improved on the basis of not affecting the overall assembly precision requirement.

In addition, the adapter 3 is further provided with positioning holes 32, and correspondingly, the longitudinal beams 101 and the inner longitudinal beams 102 are also correspondingly provided with the adaptive positioning pins 5. Thus, when the battery pack 20 is placed in the corresponding battery compartment 30, the positioning hole 32 and the positioning pin 5 are used for realizing basic positioning, and then the battery pack is screwed and fixed by the threaded fastener 4.

In other embodiments, the matching positioning holes 32 and the positioning pins 5 may be configured in opposite directions (not shown in the drawings), that is, the adaptor 3 is provided with positioning pins, and the stringers 101 and the inner stringers 102 are configured with matching positioning holes, so that basic positioning may be achieved. It will be appreciated that the positioning hole 32 is used as a first positioning portion on the partition board side, the positioning pin 5 is used as a second positioning portion on the frame side, and other structural implementation manners may be adopted, for example, but not limited to, the second positioning portion and the second positioning portion are both in the form of positioning holes, and positioning pins adapted to be inserted into the two positioning portions are additionally configured.

In the battery device 100 according to the present embodiment, the case frame 10 is exemplified by four battery packs 20 arranged in an array. In other implementations, the battery packs 20 may be configured with only one battery pack 20, or other numbers of multiple battery packs 20, rather than the four-pack array arrangement shown in the figures.

It should be understood that the specific implementation manner of other functional components of the battery device is not a core utility model point of the present application, and those skilled in the art can implement the battery device based on the prior art, so the detailed description is omitted herein.

The ordinal terms "first" and "second" used herein are used only to describe the same functional constitution or structure in the technical solution. It is to be understood that the use of the ordinal terms "first" and "second" above does not constitute an understanding of the technical solutions claimed in this application.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. A battery pack for assembly within a battery compartment of a battery device, comprising a dividing beam and a plurality of cells;

the plurality of battery cells are sequentially stacked along the second direction, and the separation beam is arranged along the first direction in an extending way; the separation beam is positioned between two adjacent electric core units and is integrated with the plurality of electric core units into an assembly body; two ends of the separation beam in the first direction are respectively provided with a detachable connecting part so as to be connected with the side part structure of the battery compartment;

the two ends of the separation beam in the first direction are respectively provided with an inner concave part, and the inner concave part penetrates through the body of the separation beam in the second direction and is positioned in the middle of the end in the third direction;

the first direction, the second direction and the third direction are respectively perpendicular, and the second direction is the stacking arrangement direction of the battery cell units.

2. The battery of claim 1, wherein in a second direction, the conductive bars connecting the cells on both sides of the separator beam pass through the inner recess.

3. The battery pack according to claim 1 or 2, wherein both ends of the partition beam are provided with an adapter, and detachably connected with a side structure of the battery compartment through the adapter.

4. A battery pack according to claim 3, wherein the body of the adapter extends in a second direction and the adapter is provided with fastener insertion openings for connection to the side structure of the battery compartment by threaded fasteners.

5. The battery pack of claim 4, wherein the adapter is further provided with a first detent thereon to mate with a second detent on a side structure of the battery compartment.

6. The battery pack according to claim 1 or 2, wherein the end face of the partition beam opposite to the battery compartment bottom structure has a first glue groove in a third direction;

wherein the third direction is perpendicular to the first direction and the second direction, respectively.

7. The battery pack of claim 6, wherein in the third direction, the separator beam has second glue grooves on both sides of the opposite end of the cell compartment bottom structure.

8. A battery device comprising a case and the battery pack according to any one of claims 1 to 7, the case having a battery compartment, the battery pack being built in the battery compartment, and a partition beam of the battery pack being detachably connected with a side structure of the battery compartment.

9. The battery device of claim 8, wherein the separator beams are glued to the bottom structure of the battery compartment at opposite ends of the bottom structure of the battery compartment in a third direction.

10. The battery device of claim 9, wherein the side structure of the battery compartment is a box frame of the battery device and the bottom structure of the battery compartment is a cold plate.