CN220628101U - Battery pack and vehicle using same - Google Patents

Abstract

The utility model discloses a battery pack and a vehicle thereof. The battery tray is provided with a plurality of battery cells, and a heat insulation piece is arranged between at least two adjacent battery cells. The connecting piece is arranged in the battery tray and is suitable for electrically connecting different electrical elements. The insulating glue covers a part of the surface of the at least one connector. According to the battery pack, the safety of the battery pack is improved, such as the insulativity between the battery tray and the battery cells, the insulativity between the battery tray and the connecting piece, the insulativity between the connecting piece and the insulativity between the battery cells, so that the reliability of the whole battery pack is improved, and further, the whole battery pack is prevented from arcing and firing caused by thermal runaway of a certain battery cell, and the use safety of the battery pack is greatly improved.

Description

Battery pack and vehicle using same

Technical Field

The utility model relates to the technical field of battery packs, in particular to a battery pack and a vehicle thereof.

Background

In the related art, when the battery pack is in use and the phenomenon of out-of-control of the battery core occurs, the temperature of the out-of-control battery core can be rapidly increased, heat can be transferred to other battery cores which normally work, so that a plurality of battery cores which normally work are in linkage thermal out-of-control, and the high-temperature and high-pressure electrolyte and smoke of the out-of-control battery core are in non-orientation, when the electrolyte and the smoke are sprayed onto a connecting piece or a battery tray, the high-pressure arc discharge and the fire of the battery pack can be caused, the safety accident is caused, and the use safety of the battery pack is greatly reduced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery pack, which improves the reliability of the whole battery pack, and further can avoid the whole battery pack from arcing and firing caused by thermal runaway of a certain battery cell, and greatly improves the use safety of the battery pack.

Another object of the present utility model is to provide a vehicle employing the above battery pack.

According to an embodiment of the first aspect of the present utility model, a battery pack includes: the battery tray is provided with a first insulating layer on the inner wall; the battery trays are provided with a plurality of battery cells, the battery cells are arranged in the battery trays, and a heat insulation piece is arranged between at least two adjacent battery cells; the connecting piece is arranged in the battery tray and is suitable for electrically connecting different electrical elements; and the insulating glue covers part of the surface of at least one connecting piece.

According to the battery pack disclosed by the embodiment of the utility model, the heat insulation piece is arranged between at least two adjacent battery cells, the first insulation layer is arranged on the inner wall surface of the battery tray, and the insulation glue is wrapped outside the connecting piece, so that the safety of the battery pack is improved, such as the insulation between the battery tray and the battery cells, the insulation between the battery tray and the connecting piece and the insulation between the battery cells, so that the integral reliability of the battery pack is improved, and further, the integral arcing and firing of the battery pack caused by thermal runaway of a certain battery cell can be avoided, and the use safety of the battery pack is greatly improved.

According to some embodiments of the utility model, the battery tray comprises at least one battery cell accommodating cavity and at least one power distribution cavity, wherein the battery cell is arranged in the battery cell accommodating cavity, and a power distribution module is arranged in the power distribution cavity; the inner wall defining the electric core accommodating cavity and the inner wall defining the power distribution cavity are respectively provided with the first insulating layer.

According to some embodiments of the utility model, the battery tray includes a bottom plate and a plurality of side beams connected to each other, the bottom plate and the plurality of side beams together define a battery cell accommodating chamber, a side surface of the bottom plate facing the battery cell accommodating chamber and a side surface of each side beam facing the battery cell accommodating chamber are respectively provided with the first insulating layer, and a side surface of the bottom plate facing the battery cell accommodating chamber and a side surface of each side beam facing the battery cell accommodating chamber are configured as at least a part of an inner wall of the battery cell accommodating chamber.

According to some embodiments of the utility model, the battery pack further comprises a partition beam, the partition Liang She being in the cell receiving cavity and dividing the cell receiving cavity into a plurality of sub-cell receiving cavities, the surface of the partition beam facing the sub-cell receiving cavities being provided with a second insulating layer.

According to some embodiments of the present utility model, the partition beam includes a longitudinal beam and a transverse beam, the longitudinal beam extends along a first direction, the transverse beam extends along a second direction, the transverse beam and the longitudinal beam partition the battery cell accommodating cavity into a plurality of sub battery cell accommodating cavities, the plurality of battery cells are respectively arranged in the plurality of sub battery cell accommodating cavities, and the plurality of battery cells are arranged along the second direction, wherein the first direction is a length direction of the battery tray, and the second direction is a width direction of the battery tray; the surfaces of the longitudinal beams and the transverse beams, which face the sub-battery cell accommodating cavity, are respectively provided with the second insulating layer.

According to some embodiments of the utility model, the battery tray includes a bottom plate and a plurality of side beams connected to each other, the bottom plate and the plurality of side beams together define the battery cell accommodating cavity, at least one of the plurality of side beams forms the power distribution cavity, and the inner wall defining the power distribution cavity is provided with the first insulating layer.

According to some embodiments of the utility model, the first insulating layer and/or the second insulating layer is an epoxy layer.

According to some embodiments of the utility model, the thickness of the insulating layer and/or the second insulating layer is 0.1cm-0.5cm.

According to some embodiments of the utility model, the battery pack further comprises a heat exchange plate provided on top of the battery tray, a side of the heat exchange plate facing the plurality of battery cells being provided with a third insulating layer.

According to some embodiments of the utility model, the third insulating layer is an epoxy layer; the thickness of the third insulating layer is 0.1cm-0.5cm.

According to some embodiments of the utility model, the battery pack includes a plurality of the connectors including a cell connector electrically connecting a plurality of the cells; and the insulating glue covers part of the surface of the cell connecting piece.

According to some embodiments of the utility model, the insulating glue fills in the battery tray and covers part of the surface of the cell connector.

According to some embodiments of the present utility model, the battery tray includes a bottom plate, a plurality of side beams, and a partition beam, the bottom plate and the plurality of side beams together defining a cell receiving cavity, the partition Liang She being in the cell receiving cavity and dividing the cell receiving cavity into a plurality of sub-cell receiving cavities, each of the sub-cell receiving cavities having a plurality of the cells disposed therein; and the insulating glue is filled between the battery cell and the side beam or the separation beam.

According to some embodiments of the utility model, a plurality of the battery cells are arranged in the thickness direction of the battery cells in each of the sub-battery cell accommodating cavities; the battery cell connecting piece is arranged between at least one end of the battery cell in the length direction and the boundary beam or the separation beam, and insulating glue is filled between at least one end of the battery cell in the length direction and the boundary beam or the separation beam.

According to some embodiments of the utility model, the heat insulation member is disposed between two adjacent cells.

According to some embodiments of the utility model, the insulation is an aerogel or fiberglass element.

According to some embodiments of the utility model, the aerogel insulation comprises a first insulation section and two second insulation sections, the two second insulation sections are respectively arranged at two ends of the first insulation section in the length direction, and the thickness of the first insulation section is greater than that of the second insulation section; and in the length direction of the first heat insulation sections, the size of each second heat insulation section is 5-15 mm.

According to some embodiments of the utility model, a plurality of the cells are configured as a plurality of battery packs; the battery pack comprises a plurality of connecting pieces, the plurality of connecting pieces comprise battery pack connecting pieces, and the battery pack connecting pieces are connected between different battery packs.

According to some embodiments of the utility model, the insulating glue is a pouring sealant.

A vehicle according to an embodiment of a second aspect of the present utility model includes a battery pack according to the embodiment of the first aspect of the present utility model described above.

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

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic view of a battery tray of a battery pack according to an embodiment of the present utility model;

fig. 4 is a schematic view of a portion of a first insulating layer of a battery pack according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a portion of a battery cell and a thermal shield of a battery pack according to an embodiment of the utility model;

fig. 6 is a schematic view of a heat exchange plate of a battery pack according to an embodiment of the present utility model;

FIG. 7 is an enlarged view of portion B of FIG. 6;

fig. 8 is a schematic view of a battery pack according to an embodiment of the present utility model;

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

fig. 10 is another angular schematic view of a battery pack according to an embodiment of the present utility model;

fig. 11 is an enlarged view of a portion C shown in fig. 10.

Reference numerals:

100: a battery pack;

1: a battery tray; 11: a first insulating layer; 12: a cell receiving cavity; 121: a sub-cell receiving cavity; 13: a power distribution cavity; 131: a power distribution module; 14: a dividing beam; 141: a longitudinal beam; 142: a cross beam; 15: edge beams; 16: a bottom plate; 2: a battery cell; 21: a heat insulating member; 211: a first heat insulating section; 212: a second heat insulating section; 3: insulating glue; 4: a heat exchange plate; 41: a third insulating layer; 5: a connecting piece; 51: a cell connector; 52: a battery pack connection member; 6: a battery pack.

Detailed Description

A battery pack 100 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 11.

As shown in fig. 1 to 11, a battery pack 100 according to an embodiment of the first aspect of the present utility model includes a battery tray 1, a plurality of battery cells 2, a connector 5, and an insulating paste 3. In the description of the present utility model, "plurality" means two or more.

Specifically, a first insulating layer 11 is provided on the inner wall of the battery tray 1, a plurality of battery cells 2 are all provided in the battery tray 1, and a heat insulating member 21 is provided between at least two adjacent battery cells 2. The connector 5 is adapted to electrically connect different electrical components. The insulating glue 3 covers part of the surface of at least one connector 5.

For example, in the examples of fig. 1 to 3, a plurality of battery cells 2 are sequentially arranged in the battery tray 1 along the length direction (e.g., the left-right direction in fig. 3) of the battery tray 1. The heat insulation piece 21 is arranged between the two adjacent electric cores 2 and used for blocking heat transfer between the two adjacent electric cores 2, so that heat transfer to the electric cores 2 adjacent to the single electric core 2 after thermal runaway is avoided, and further the whole ignition of the battery pack 100 is caused, and the use safety of the battery pack 100 is improved.

By arranging the first insulating layer 11 on the inner wall of the battery tray 1 facing the battery core 2, the insulativity of the battery tray 1 is improved, the whole arc-striking and ignition of the battery pack 100 can be further avoided, and the use safety of the battery pack 100 is further improved.

The electrical components may include a battery cell 2, a battery pack 6 having a plurality of battery cells 2, a Battery Management System (BMS), and the like. For example, the different electrical components electrically connected to the connector 5 may be the battery cells 2 and 2, or the battery cells 2 and 6, the battery pack 6 and the BMS, etc.

It should be noted that, since the connection member 5 needs to leave the contact position electrically connected to the electrical component uncovered by the insulating paste 3, the insulating paste 3 covers a part of the surface of the connection member 5, not the entire surface; for example, in the examples of fig. 8-11, the insulating paste 3 covers a part of the surface of the connection member 5, for example, for the connection member 5 electrically connecting the battery cells 2 and the battery cells 2, the insulating paste 3 may cover only the vicinity of the electrical connection of the connection member 5 and the terminal of the battery cell 2 (the electrical connection contact position is not covered); alternatively, the insulating paste 3 may cover the entire surface of the connection member 5 except for the electrical connection contact position. The insulating paste 3 covers a part of the surface of at least one of the connection members 5, it being understood that when there is one connection member 5, the insulating paste 3 covers a part of the surface of that connection member 5, and when there are a plurality of connection members 5, the insulating paste 3 covers a part of the surface of one of the connection members 5 or a part of the surface of a plurality of connection members 5. The insulating glue 3 can further improve the insulating performance and the heat insulation performance of the battery pack 100, and further improve the use safety of the battery pack 100.

According to the battery pack 100 of the embodiment of the utility model, the heat insulation member 21 is arranged between at least two adjacent battery cells 2, the first insulation layer 11 is arranged on the inner wall surface of the battery tray 1, and the insulation glue 3 is wrapped on part of the surface of the connecting member 5, so that the safety of the battery pack 100 is improved, such as the insulation between the battery tray 1 and the battery cells 2, between the battery tray 1 and the connecting member 5, between the connecting member 5 and the connecting member 5, and the heat insulation between the battery cells 2, thereby improving the reliability of the whole battery pack 100, and further avoiding the whole arcing and firing of the battery pack 100 caused by the thermal runaway of one battery cell 2, and greatly improving the use safety of the battery pack 100.

According to some embodiments of the present utility model, the battery tray 1 includes at least one battery cell accommodating cavity 12 and at least one power distribution cavity 13, the battery cell 2 is disposed in the battery cell accommodating cavity 12, the power distribution cavity 13 is provided with a power distribution module 131, and the inner wall defining the battery cell accommodating cavity 12 and the inner wall defining the power distribution cavity 13 are respectively provided with the first insulating layer 11. The first insulating layer 11 is disposed on the inner wall of the battery tray 1, and the first insulating layer 11 may be disposed on a part of the inner wall of the battery tray 1, or the first insulating layer 11 may be disposed on all of the inner wall of the battery tray 1.

The inner wall defining the distribution chamber 13 (the inner wall of the battery tray 1 facing the distribution chamber 13) and the inner wall defining the cell housing chamber 12 (the inner wall of the battery tray 1 facing the cell housing chamber 12) are provided with a first insulating layer 11, respectively. Referring to fig. 1 and 3, a battery tray 1 is provided with a battery cell accommodating cavity 12 and a power distribution cavity 13, the power distribution cavity 13 is located at two sides of the battery tray 1 in the length direction, a plurality of battery cells 2 are installed in the battery cell accommodating cavity 12, a power distribution module 131 is installed in the power distribution cavity 13, and the power distribution module 131 is electrically connected with the battery cells 2.

The inner wall of the battery tray 1 is understood to be the side wall of the battery tray 1 facing the battery cells 2, for example, when the battery pack 100 has a battery cell receiving cavity 12 for receiving the battery cells 2 and/or a power distribution cavity 13 for receiving the power distribution module 131 therein, the inner wall includes the wall of the battery tray 1 defining the battery cell receiving cavity 12 and/or the wall of the battery tray 1 defining the power distribution cavity 13.

Wherein, through being equipped with first insulating layer 11 at the inner wall that prescribes a limit to distribution chamber 13, can carry out insulation protection to the inner wall of distribution chamber 13, avoid the electric current transmission that distribution module 131 produced to battery tray 1 on or distribution module 131 fires and transmit to electric core 2 to the safety in utilization of battery package 100 has further been improved. Through set up first insulating layer 11 on the inner wall of battery tray 1 orientation electric core 2, hold the inner wall of chamber 12 to the electric core and carry out insulation protection, and then avoid electric core 2 to splash the electrolyte of back high temperature high pressure and arouse the whole arc of battery package 100 to strike sparks on battery tray 1 out of control to the safety in utilization of battery package 100 has further been improved.

Further, the battery tray 1 includes a bottom plate 16 and a plurality of side rails 15 connected to each other, the bottom plate 16 and the plurality of side rails 15 together define the battery cell accommodating chamber 12, a side surface of the bottom plate 16 facing the battery cell accommodating chamber 12 and a side surface of each side rail 15 facing the battery cell accommodating chamber 12 are respectively provided with the first insulating layer 11, and a side surface of the bottom plate 16 facing the battery cell accommodating chamber 12 and a side surface of each side rail 15 facing the battery cell accommodating chamber 12 are configured as at least a part of an inner wall of the battery cell accommodating chamber 12. Referring to fig. 3, four side rails 15 connected to each other enclose a rectangular ring frame, and a bottom plate 16 is provided at one end of the side rails 15 in the height direction (e.g., up-down direction in fig. 3), thereby defining the cell accommodating chamber 12. The inner wall of the cell housing chamber 12 at this time includes a side surface (upper surface in fig. 3) of the bottom plate 16 facing the cell housing chamber 12 and a side surface of each side beam 15 facing the cell housing chamber 12. The bottom plate 16 and the side beam 15 are provided with the first insulating layer 11 towards one side surface of the battery cell accommodating cavity 12, so that the insulativity of the surface of the battery tray 1 towards the battery cell accommodating cavity 12 is improved, the whole arc-striking and ignition of the battery pack 100 are further effectively avoided, and the use safety of the battery pack 100 is further improved.

Still further, the battery pack 100 further includes a partition beam 14, the partition beam 14 is disposed in the cell accommodating chamber 12 and partitions the cell accommodating chamber 12 into a plurality of sub-cell accommodating chambers 121, and a surface of the partition beam 14 facing the sub-cell accommodating chambers 121 is provided with a second insulating layer (not shown in the drawing). By the arrangement, a plurality of battery cells 2 in the battery tray 1 can be spaced apart, and the insulativity between the battery tray 1 and the battery cells 2 is improved, so that the whole arc-striking and ignition of the battery pack 100 can be avoided, and the use safety of the battery pack 100 is greatly improved.

According to some embodiments of the present utility model, referring to fig. 3, the partition beam 14 includes a longitudinal beam 141 and a cross beam 142, the longitudinal beam 141 extending in a first direction (e.g., front-to-rear direction in fig. 3), the cross beam 142 extending in a second direction (e.g., left-to-right direction in fig. 3), the cross beam 142 and the longitudinal beam 141 partitioning the cell housing chamber 12 into a plurality of sub-cell housing chambers 121, the plurality of cells 2 being respectively disposed within the plurality of sub-cell housing chambers 121, the plurality of cells 2 being arranged in the second direction. The first direction is the longitudinal direction of the battery tray 1, and the second direction is the width direction of the battery tray 1. The surfaces of the longitudinal beam 141 and the transverse beam 142 facing the sub-cell accommodating cavity 121 are both provided with a second insulating layer.

Wherein the battery tray 1 has a larger dimension in its length direction than in its width direction.

For example, in the example of fig. 3, the plurality of partition beams 14 includes one longitudinal beam 141 and two transverse beams 142, the longitudinal beam 141 being located at a central axis of the cell housing chamber 12 in the second direction, the two transverse beams 142 being spaced apart in the first direction. Through the cooperation of two crossbeams 142 and a longeron 141, with the electric core hold chamber 12 separate into six sub-electric core hold chamber 121 to with a plurality of electric cores 2 in the battery tray 1 spaced apart, avoid sub-electric core hold electric core 2 thermal runaway in the chamber 121 and transmit to rather than adjacent sub-electric core hold chamber 121, and then avoid certain electric core 2 thermal runaway to cause chain thermal runaway, avoid separating roof beam 14 and electric core 2 or electrolyte short circuit simultaneously.

Optionally, a heat-conducting structural adhesive may be disposed between the bottom of the battery cell 2 and the bottom plate 16 of the battery tray 1, so that while the battery cell 2 is firmly fixed on the battery tray 1, heat of the battery cell 2 can be transferred to the bottom plate 16 through the heat-conducting structural adhesive, and heat dissipation of the battery pack 100 is achieved when the bottom plate 16 is transferred to the outside.

According to some embodiments of the present utility model, a distribution chamber 13 is formed on at least one boundary beam 15 of the plurality of boundary beams 15, and an inner wall defining the distribution chamber 13 is provided with a first insulating layer 11. As shown in fig. 3, a power distribution cavity 13 is formed on an edge beam 15 located at least one end of the first direction of the battery tray 1, one end of the first direction of the power distribution cavity 13 is open, and a power distribution module 131 can be installed in the power distribution cavity 13 through the open side, so that the power distribution module 131 in the power distribution cavity 13 and the battery cell 2 in the battery cell accommodating cavity 12 are spaced apart, the power distribution module 131 and the battery cell 2 are prevented from being affected mutually, the short circuit between the power distribution module 131 and the battery tray 1 is prevented, and the use safety of the battery pack 100 is improved.

According to some embodiments of the present utility model, the first insulating layer 11 is an epoxy layer.

According to some embodiments of the utility model, the second insulating layer is an epoxy layer.

The epoxy resin has the advantages of strong adhesive force, high structural strength, good heat resistance, good electrical insulation and the like, and the epoxy resin layer is adopted as the first insulating layer 11 and/or the second insulating layer, so that the insulativity of the inner surface of the inner peripheral surface of the battery tray 1 can be enhanced, and the use safety of the battery pack 100 is further improved.

According to some embodiments of the utility model, the thickness of the first insulating layer 11 is 0.1cm-0.5cm.

According to some embodiments of the utility model, the second insulating layer has a thickness of 0.1cm to 0.5cm.

The first insulating layer 11 and/or the second insulating layer are provided in the above thickness range, so that the insulating layer can be prevented from excessively occupying the space of the battery pack 100 while ensuring the insulation.

In some alternative embodiments, the battery pack 100 further comprises a heat exchange plate 4, the heat exchange plate 4 being provided on top of the battery tray 1, a side of the heat exchange plate 4 facing the plurality of battery cells 2 being provided with a third insulating layer 41. The heat exchange plate 4 is filled with water or other fluid, and the heat exchange plate 4 can absorb and transfer the heat generated by the battery cell 2 to the surrounding environment, or can transfer the heat of the heat conducting liquid to the battery cell 2 to adjust the temperature of the battery cell 2, so that the temperature of the battery cell 2 is maintained stable, and the battery pack 100 can work normally. By arranging the third insulating layer 41 on the heat exchange plate 4, the heat exchange plate 4 can be insulated and protected towards one side of the battery cell 2, so that current is prevented from being transmitted to the heat exchange plate 4, and the use safety of the battery pack 100 is improved.

According to some embodiments of the utility model, the third insulating layer 41 is an epoxy layer. The epoxy resin has the advantages of strong adhesive force, high structural strength, good heat resistance, good electrical insulation and the like, and the epoxy resin layer is adopted as the third insulating layer 41, so that the insulation of the inner surface of the heat exchange plate 4 can be enhanced, and the use safety of the battery pack 100 can be further improved.

According to some embodiments of the utility model, the thickness of the third insulating layer 41 is between 0.1cm and 0.5cm. Thereby, the insulation of the third insulation layer 41 is ensured to improve the use safety of the battery pack 100.

According to some embodiments of the present utility model, the battery pack 100 includes a plurality of connection members 5, the plurality of connection members 5 including a cell connection member 51, the cell connection member 51 being electrically connected between the cells 2; the insulating paste 3 covers a part of the surface of the cell connector 51. Thereby, a short circuit between different cell connectors 51 or between the cell connectors 51 and other elements can be avoided, thereby improving the use stability and safety of the battery pack 100.

According to some embodiments of the present utility model, the insulating paste 3 is filled in the battery tray 1 and covers a part of the surface of the cell connector 51. Thus, interference between different electrical components in the battery pack 100 can be further avoided, and the safety of the battery pack 100 can be improved.

According to some embodiments of the present utility model, the battery tray 1 includes a bottom plate 16, a plurality of side beams 15, and a partition beam 14, the bottom plate 16 and the plurality of side beams 15 together defining a cell housing cavity 12, the partition beam 14 being disposed in the cell housing cavity 12 and dividing the cell housing cavity 12 into a plurality of sub-cell housing cavities 121, each sub-cell housing cavity 121 having a plurality of cells 2 disposed therein. Insulating glue 3 is filled between the battery cell 2 and the side beam 15 or the separation beam 14. In this way, the insulation between the battery cell 2 and the side beam 15 or the partition beam 14 can be improved, and when the terminal of the battery cell 2 and the battery cell connecting piece 51 connecting the terminal of different battery cells 2 are arranged between the battery cell 2 and the side beam 15 or the partition beam 14, unnecessary mutual interference among the battery cell 2, the battery cell connecting piece 51, the tray 1 and the partition beam 14 can be avoided, and the safety and the stability of the battery pack 100 are improved.

Further, as shown in fig. 8 to 9, a plurality of cells 2 arranged in the thickness direction of the cells 2 are provided in each sub-cell accommodation chamber 121. The dimension of the battery cell 2 in the longitudinal direction is larger than the dimension thereof in the width direction, and the dimension of the battery cell 2 in the width direction is larger than the dimension thereof in the thickness direction. The cell connector 51 is disposed between at least one end of the cell 2 in the longitudinal direction and the side beam 15 or the partition beam 14, and the insulating adhesive 3 is filled between at least one end of the cell 2 in the longitudinal direction and the side beam 15 or the partition beam 14. That is, the cell connector 51 is provided between the cell 2 and the side beam 15; alternatively, the cell connector 51 is provided between the cell 2 and the partition beam 14. The insulating glue 3 can be filled between the battery cell 2 and the battery cell connecting piece 51, between the battery cell connecting piece 51 and the side beam 15 or between the battery cell connecting piece 51 and the separation beam 14, so that the battery cell connecting piece 51 is separated from the battery cell 2, the side beam 15 or the separation beam 14, the insulativity of the battery cell connecting piece 51 and the battery cell 2, the side beam 15 or the separation beam 14 is improved, and the use safety of the battery pack 100 is further improved.

According to some embodiments of the utility model, a thermal insulation 21 is provided between two adjacent cells 2. So set up, the both sides of the thickness direction of every thermal-insulated 21 all are equipped with electric core 2 to interval two adjacent electric cores 2, and then avoid heat transfer to rather than adjacent electric core 2 behind the single electric core 2 thermal runaway, avoid the whole fire of battery package 100.

In some alternative embodiments, the plurality of cells 2 are configured as a plurality of battery packs 6. For example, in the example of fig. 1, 8-11, the number of battery packs 6 is six, and each battery pack 6 is provided in a corresponding sub-cell accommodation chamber 121. The battery pack 100 includes a plurality of connection members 5, and the plurality of connection members 5 include battery pack connection members 52, and the battery pack connection members 52 are connected between different battery packs 6. So set up, the electric connection is carried out to the group battery 6 of difference utilizing the group battery connecting piece 52, guarantees the electric connection stability between a plurality of group batteries 6 to promote the wholeness and the stability in use of battery package 100.

In some alternative embodiments, the insulation 21 is an aerogel or fiberglass element. The aerogel piece has the advantages of low density, high structural strength, high temperature resistance and the like. The glass fiber piece has the advantages of firm structure, strong corrosion resistance, good insulativity and the like. By adopting the aerogel piece or the glass fiber piece as the heat insulation piece 21, the battery pack 100 can be designed in a lightweight manner, the heat insulation capacity of the heat insulation piece 21 is improved, and meanwhile, the cost is lower.

Further, the heat insulating member 21 includes a first heat insulating section 211 and two second heat insulating sections 212, the two second heat insulating sections 212 being respectively provided at both ends of the first heat insulating section 211 in the length direction, the thickness of the first heat insulating section 211 being greater than the thickness of the second heat insulating section 212. Namely, the heat insulator 21 is thick in the middle and thin at both ends in the longitudinal direction. The second heat-insulating section 212 can play a role of sealing edges in the whole heat-insulating piece 21, and the second heat-insulating section 212 can only contain sealing edge layers without containing the aerogel piece or the glass fiber piece, so that the heat-insulating piece 21 is subjected to the role of sealing edges, the structural stability of the heat-insulating piece 21 is ensured, the heat-insulating piece 21 is ensured to be heat-insulating, and when the heat-insulating piece 21 is damaged, the heat-insulating piece 21 can be taken by the second heat-insulating section 212, so that the replacement of the heat-insulating piece 21 is realized.

Alternatively, each of the second heat insulating sections 212 has a size of 5mm to 15mm in the length direction of the first heat insulating section 211, whereby the heat insulating effect of the heat insulating member 21 can be ensured while the edge sealing of the heat insulating member 21 is ensured. Optionally, a double-sided tape is adhered to the heat insulating member 21, and is connected to the battery cell 2 through the double-sided tape.

In some alternative embodiments, the insulating glue 3 is a potting glue. Wherein, the pouring sealant is in a liquid state before being solidified, has fluidity and is easy to fill. After the pouring sealant is completely cured, the functions of water resistance, moisture resistance, dust resistance, insulation, heat conduction, confidentiality, corrosion resistance, temperature resistance and vibration resistance can be achieved. Thus, the adoption of the pouring sealant as the insulating sealant 3 can increase the wrapping property of the connecting piece 5.

A vehicle (not shown) according to an embodiment of the second aspect of the present utility model includes the battery pack 100 according to the above-described embodiment of the first aspect of the present utility model.

According to the vehicle provided by the embodiment of the utility model, the safety and stability of the driving process are improved by adopting the battery pack 100, and the maintenance cost of the vehicle is reduced.

Other constructions and operations of the battery pack 100 and the vehicle according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

In the description of the present utility model, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements 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.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

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 (20)

1. A battery pack, comprising:

the battery tray is provided with a first insulating layer on the inner wall;

the battery trays are provided with a plurality of battery cells, the battery cells are arranged in the battery trays, and a heat insulation piece is arranged between at least two adjacent battery cells;

the connecting piece is arranged in the battery tray and is suitable for electrically connecting different electrical elements;

and the insulating glue covers part of the surface of at least one connecting piece.

2. The battery pack of claim 1, wherein the battery tray comprises at least one cell receiving cavity and at least one power distribution cavity, the cell being disposed within the cell receiving cavity, the power distribution cavity being provided with a power distribution module therein; the inner wall defining the electric core accommodating cavity and the inner wall defining the power distribution cavity are respectively provided with the first insulating layer.

3. The battery pack according to claim 1, wherein the battery tray includes a bottom plate and a plurality of side rails connected to each other, the bottom plate and the plurality of side rails together defining a cell accommodating chamber, a side surface of the bottom plate facing the cell accommodating chamber and a side surface of each side rail facing the cell accommodating chamber are respectively provided with the first insulating layer, and a side surface of the bottom plate facing the cell accommodating chamber and a side surface of each side rail facing the cell accommodating chamber constitute at least a part of an inner wall of the cell accommodating chamber.

4. The battery pack of claim 3, further comprising a separation beam in the cell receiving cavity and separating the cell receiving cavity into a plurality of sub-cell receiving cavities, the separation beam having a second insulating layer disposed on a surface facing the sub-cell receiving cavities.

5. The battery pack according to claim 4, wherein the partition beam includes a side member and a cross member, the side member extending in a first direction, the cross member extending in a second direction, the cross member and the side member partitioning the cell housing chamber into a plurality of the sub-cell housing chambers, the plurality of the cells being disposed in the plurality of the sub-cell housing chambers, respectively, the plurality of the cells being arranged in the second direction, wherein the first direction is a length direction of the battery tray, and the second direction is a width direction of the battery tray;

the surfaces of the longitudinal beams and the transverse beams, which face the sub-battery cell accommodating cavity, are respectively provided with the second insulating layer.

6. The battery pack of claim 2, wherein the battery tray includes a bottom plate and a plurality of side rails connected to each other, the bottom plate and the plurality of side rails together defining the cell receiving cavity, at least one of the plurality of side rails forming the power distribution cavity, an inner wall defining the power distribution cavity being provided with the first insulating layer.

7. The battery pack of claim 4, wherein the first insulating layer and/or the second insulating layer is an epoxy layer.

8. The battery pack of claim 4, wherein the thickness of the first insulating layer and/or the second insulating layer is 0.1cm to 0.5cm.

9. The battery pack according to claim 1, further comprising:

the heat exchange plate is arranged at the top of the battery tray, and a third insulating layer is arranged on one side of the heat exchange plate facing the battery cells.

10. The battery pack of claim 9, wherein the third insulating layer is an epoxy layer; the thickness of the third insulating layer is 0.1cm-0.5cm.

11. The battery pack of claim 1, wherein the battery pack includes a plurality of the connectors, the plurality of connectors including a cell connector that electrically connects the plurality of cells; and the insulating glue covers part of the surface of the cell connecting piece.

12. The battery pack of claim 11, wherein the insulating gel fills the battery tray and covers a portion of the surface of the cell connector.

13. The battery pack of claim 11, wherein the battery tray includes a bottom plate, a plurality of side rails, and a divider beam, the bottom plate and the plurality of side rails together defining a cell receiving cavity, the divider Liang She being in the cell receiving cavity and dividing the cell receiving cavity into a plurality of sub-cell receiving cavities, each of the sub-cell receiving cavities having a plurality of the cells disposed therein; and the insulating glue is filled between the battery cell and the side beam or the separation beam.

14. The battery pack according to claim 13, wherein a plurality of the cells arranged in the thickness direction of the cells are provided in each of the sub-cell accommodation cavities; the battery cell connecting piece is arranged between at least one end of the battery cell in the length direction and the boundary beam or the separation beam, and insulating glue is filled between at least one end of the battery cell in the length direction and the boundary beam or the separation beam.

15. The battery pack of claim 1, wherein the thermal insulation member is disposed between two adjacent cells.

16. The battery pack of any one of claims 1-15, wherein the insulation member is an aerogel member or a fiberglass member.

17. The battery pack according to claim 16, wherein the heat insulating member includes a first heat insulating section and two second heat insulating sections, the two second heat insulating sections being provided at both ends in a length direction of the first heat insulating section, respectively, and a thickness of the first heat insulating section being greater than a thickness of the second heat insulating section;

and in the length direction of the first heat insulation sections, the size of each second heat insulation section is 5-15 mm.

18. The battery pack of claim 1, wherein a plurality of the cells are configured as a plurality of battery packs;

the battery pack comprises a plurality of connecting pieces, the plurality of connecting pieces comprise battery pack connecting pieces, and the battery pack connecting pieces are connected between different battery packs.

19. The battery pack of any one of claims 1-15, wherein the insulating glue is a potting adhesive.

20. A vehicle comprising a battery pack according to any one of claims 1-19.