CN112259823B

CN112259823B - Battery pack

Info

Publication number: CN112259823B
Application number: CN202010359020.3A
Authority: CN
Inventors: 马腾; 范凯; 王旭东; 王森
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2022-06-10
Anticipated expiration: 2040-04-29
Also published as: CN112259823A

Abstract

The invention relates to the technical field of batteries, and discloses a battery pack which comprises a battery module, a bottom plate for supporting the battery module and an upper cover in a cover body shape; the battery module comprises a module body, the module body comprises a battery module frame and an electric core, the battery module frame comprises a frame body provided with a containing cavity capable of containing the electric core, a cooling air channel extending along the width direction of the battery module is arranged on the wall of the containing cavity, and the cooling air channel is provided with an air inlet and an air outlet which are respectively used for cooling air to enter and exit and are respectively positioned on two sides of the battery module; the upper cover is arranged outside the battery module and is installed on the bottom plate, the upper cover is provided with an air inlet and an air outlet which are used for cooling air to enter and exit respectively, an air inlet channel communicated with the air inlet is formed between the first sides of the upper cover and the module body, which are provided with air inlets, and an air outlet channel communicated with the air outlet is formed between the second sides of the upper cover and the module body, which are provided with air outlets. This battery package can in time distribute away the heat that electric core produced.

Description

Battery pack

Technical Field

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

Background

With the current social energy crisis becoming more serious, new energy automobiles are more and more concerned by society, and electric automobiles are more concerned. Taking an electric automobile as an example, batteries are widely used in electric automobiles, and the batteries can provide electric energy for driving motors of the electric automobiles. Because the battery can release a large amount of heats at the charge-discharge in-process, if these heats can't in time be discharged, can cause the heat to gather to produce the safety problem, in addition, the multiplying power performance and the life of electric core still can be influenced in the rising of temperature, thereby reduce battery system's reliability, security and life.

Disclosure of Invention

The invention aims to provide a battery pack, which can timely dissipate heat generated by a battery core, and improves the use safety of the battery pack.

In order to achieve the above object, an aspect of the present invention provides a battery pack, including:

the battery module, the battery module includes the module body, the module body includes battery module frame and electric core, battery module frame includes the frame body, be provided with on the frame body and hold the chamber that holds of electric core, be provided with on the wall that holds the chamber and follow the cooling gas channel that the width direction of battery module extends, the cooling gas channel has the confession respectively the air intake that the cooling gas got into and the cooling gas exhaust air outlet after supplying the heat transfer, wherein: the air inlet and the air outlet are respectively positioned on two sides along the width direction of the battery module;

a base plate configured to be capable of supporting the battery module; and

the upper cover, the upper cover is the cover body form, the upper cover housing is located the outside of battery module and install in the bottom plate, the upper cover is provided with the air inlet that supplies the cooling gas to get into and supplies cooling gas exhaust gas outlet, the upper cover with being provided with of module body form between the first side of air intake with the inlet air channel that the air inlet is linked together, the upper cover with being provided with of module body form between the second side of air outlet with the air-out passageway that the gas outlet is linked together.

Above-mentioned technical scheme is the upper cover that the cover form is through setting up, makes the module body is established to the upper cover, and makes the upper cover respectively with being provided with of module body the first side of air intake with being provided with of module body form inlet air channel and air-out passageway between the second side of air outlet to can leading-in the outside cooling gas of battery package to this is internal to the module, and through corresponding cooling gas passageway with behind the air-out passageway, by the air outlet is discharged, in time distributes away the heat that the electricity core produced from this, has improved the safety in utilization of battery package.

Preferably, the size of the air inlet channel in the width direction of the battery module is tapered in a direction from the air inlet to a direction away from the air inlet.

Preferably, the upper cover comprises an upper cover body covering the top of the module body, and a first folding edge and a second folding edge which are respectively arranged on two sides of the upper cover along the width direction of the battery module, and the first folding edge and the second folding edge both extend towards the bottom plate;

the battery module frame comprises a pair of end plates which are respectively arranged at two ends of the frame body, and one side of each end plate, which is close to the air outlet, extends beyond the frame body to form an end plate extension part; wherein:

the air inlet channel is formed by reserving a gap between the first turning edge and the first side of the module body, the air inlet is formed between the first turning edge and the end plate, the air outlet channel is formed by jointly enclosing the second turning edge, the second side of the module body and the pair of end plate extending parts, the air outlet is formed in the second turning edge, and the first turning edge is gradually close to the module body from the air inlet to the direction far away from the air inlet.

Preferably, the frame body includes a plurality of mounting plates arranged in a length direction of the battery module;

the first face of mounting panel is provided with the edge many beads of the direction of height interval distribution of battery module, the bead is followed the width direction of battery module extends, and is adjacent form between the bead cooling gas channel, adjacent two the mounting panel can enclose jointly and close and form hold the chamber, one in two adjacent mounting panels the first face of mounting panel is towards another the second face of mounting panel.

Preferably, a containing space capable of containing the battery cell is formed between the end plate and the mounting plate adjacent to the end plate, and a wall of the end plate facing the mounting plate is provided with a cooling channel for passing cooling air.

Preferably, the battery module comprises a busbar support, the busbar support comprises a support body mounted at the top end of the module body and a bending part connected to the support body and capable of mounting the low-voltage plug-in, and the bending part extends out of the battery module frame and bends towards the upper part of the upper cover.

Preferably, the base plate comprises a first laminate and a second laminate, wherein: the first laminate is provided with a supporting surface capable of supporting the module body of the battery module and a binding surface deviating from the supporting surface, and the second laminate is bound to the binding surface; the bottom plate further comprises a strength reinforcing structure arranged on the second laminate.

Preferably, the strength reinforcing structure comprises a first protruding rib arranged on the second laminate, and the first protruding rib can be attached to the attaching surface.

Preferably, the upper cover comprises an inner plate close to the module body of the battery module and an outer plate attached to the outer wall surface of the inner plate; the upper cover further comprises a first strength reinforcing mechanism arranged on the outer plate.

Preferably, the first strength reinforcing mechanism includes a first reinforcing rib provided on the outer plate, and the first reinforcing rib protrudes from the outer wall surface of the outer plate.

Drawings

Fig. 1 is a schematic perspective view of a battery pack according to a preferred embodiment of the present invention;

fig. 2 is a schematic view illustrating an exploded structure of the battery pack shown in fig. 1;

fig. 3 is a schematic perspective view of another angle of the battery pack according to the preferred embodiment of the present invention, in which a protective cover capable of covering the electric components is not shown;

fig. 4 is a schematic perspective view of another angle of the battery pack according to the preferred embodiment of the present invention, in which the electric parts provided to the upper cover are not shown;

fig. 5 is a schematic perspective view of another angle of the battery pack according to the preferred embodiment of the present invention, in which the outer plate of the upper cover is not shown;

fig. 6 is a schematic top view of the battery pack shown in fig. 5;

fig. 7 is a schematic bottom view of the bottom plate of the battery pack according to the preferred embodiment of the present invention;

fig. 8 is a schematic view of an exploded structure of an upper cover of a battery pack according to a preferred embodiment of the present invention;

FIG. 9 is a perspective view of the inner panel of the upper cover shown in FIG. 8;

fig. 10 is a perspective view schematically illustrating a protective cover in an upper cover of a battery pack according to a preferred embodiment of the present invention;

FIG. 11 is a schematic perspective view of an alternate angle of the protective cover in the overcap of FIG. 10;

FIG. 12 is a schematic view of a portion of the structure shown at A in FIG. 11;

fig. 13 is a perspective view illustrating a module body of a battery pack according to a preferred embodiment of the present invention;

FIG. 14 is an enlarged partial schematic view of the module body shown in FIG. 13;

fig. 15 is a perspective view illustrating a fixing member in a battery module frame of the battery pack shown in fig. 2;

FIG. 16 is an enlarged, fragmentary, schematic view of the anchor shown in FIG. 15;

fig. 17 is a perspective view illustrating a mounting plate in a battery module frame of a battery pack according to a preferred embodiment of the present invention;

fig. 18 is a perspective view illustrating another angle of the mounting plate in the battery module frame of the battery pack according to the preferred embodiment of the present invention.

Description of the reference numerals

10-a base plate; 12-a first ply; 120-a support surface; 14-a second ply; 16 a-a first projecting rib; 16 b-a second projecting rib; 18-a support boss; 110-a first flange; 112-second flanging; 20-a battery module; 22-module body; 30-upper cover; 32-inner layer plate; 320-folding the inner layer; 322-inner layer fixing turned edge; 324-a first thermal runaway vent; 326-strength enhancing depressions; 328-fitting the concave part; 34-outer laminates; 340-folding the outer layer; 342-outer layer fixed flanging; 344-a second thermal runaway vent; 35-outer shell body; 36 a-a first stiffener; 360 a-supporting reinforcing ribs; 362 a-edge stiffener; 36 b-a second stiffener; 37-inner cover; 380-anti-rebound groove; 39-a protective cover; 390-a boot body; 392-an extension shield; 394-end cap. 50-a battery module frame; 51-an end plate; 510-a cooling channel; 512-convex strips; 52-a frame body; 520-a mounting plate; 522-a first support plate; 524-a second support plate; 530-mounting the belt; 532-upper cover plate; 534-mounting groove; 54-fixing the boss; 540-boss; 56-a fixing member; 560-a fixed body; 561-mounting through holes; 562-pressing plate; 564-an elastic sleeve; 566-water bar; 568-weight reduction chamber; 58-cooling gas channel; 580-bead; 590-plug-in; 592-a slot; 594-an insertion boss; 596-division plate; 600-a battery management system; 602-a battery distribution box; 604-an air inlet; 606-gas outlet; 620-upper cover body; 622-first flanging; 624-second flanging edge; 626-an end plate extension; 640-a bending part; 642-an introducer tube; 644-an outlet pipe; 646-thermal runaway delivery line.

Detailed Description

In the present invention, the use of directional terms such as "upper, lower, left and right" in the absence of a contrary explanation generally means that the directions shown in the drawings and the practical application are considered to be the same, and "inner and outer" mean the inner and outer of the outline of the component.

The present invention provides a battery pack, as shown in fig. 1, 2, 3 and 4, which includes a battery module 20, a base plate 10 and an upper cover 30. Battery module 20 includes module body 22, and module body 22 includes battery module frame 50 and electric core, and battery module frame 50 includes frame body 52, is provided with on the frame body 52 and can holds the chamber that holds of electric core, it is provided with the cooling gas channel 58 that extends along battery module 20's width direction on the wall of chamber to hold, and cooling gas channel 58 has the air intake that supplies respectively the cooling gas gets into and the cooling gas exhaust air outlet after supplying the heat transfer, wherein: the air inlet and the air outlet are respectively located on two sides in the width direction of the battery module 20, the cooling air enters from one side of the module body 22, and is discharged from the other side of the module body 22 after cooling the battery core; the base plate 10 is provided to be able to support the battery module 20; the upper cover 30 is in a cover body shape, the upper cover 30 covers the outside of the battery module 20 and is installed on the bottom plate 10, the upper cover 30 is provided with an air inlet 604 for cooling air to enter and an air outlet 606 for cooling air to exhaust, an air inlet channel communicated with the air inlet 604 is formed between the first sides of the upper cover 30 and the module body 22, which are provided with the air inlets, and an air outlet channel communicated with the air outlet 606 is formed between the second sides of the upper cover 30 and the module body 22, which are provided with the air outlets. Be the upper cover 30 that the cover body appears through the setting for module body 22 is established to upper cover 30 cover, and make upper cover 30 respectively with being provided with of module body 22 the first side of air intake and being provided with of module body 22 form inlet air channel and air-out passageway between the second side of air outlet, thereby can be with leading-in module body 22 of the outside cooling gas of battery package in, and through corresponding cooling gas passageway 58 with behind the air-out passageway, discharge by gas outlet 606, in time distribute away the heat that electric core produced from this, improved the safety in utilization of battery package.

It should be noted that the arrangement direction of the cells of the battery module 20 is the length direction of the battery module 20, and the horizontal direction perpendicular to the length direction is the width direction of the battery module 20, it can be understood that the length direction of the battery module 20 is consistent with the length direction of the module body 22, and the width direction of the battery module 20 is consistent with the width direction of the module body 22. The plurality of battery cells are arranged along the thickness direction of the battery cells.

In order to make the distribution of the cooling air uniform, as shown in fig. 5 and 6 in conjunction, the size of the air intake channel in the width direction of the battery module 20 is preferably tapered in the direction from the air inlet 604 to a direction away from the air inlet 604, whereby the cooling effect is greatly improved.

The air inlet channel and the air outlet channel can be formed in the following mode, the structure is greatly simplified, few parts are arranged, and the weight of the battery pack is convenient to reduce. The upper cover 30 may include an upper cover body 620 covering the top of the module body 22, and first and

second turnover edges

622 and 624 respectively provided at both sides of the upper cover 30 in the width direction of the battery module 20, and the first and

second turnover edges

622 and 624 may each extend toward the bottom plate 10, and specifically, the first turnover edge 622 may be located at a first side of the module body 22 where an air inlet is provided, and the second turnover edge 624 may be located at a second side of the module body 22 where an air outlet is provided; as shown in fig. 4, 13 and 14, the battery module frame 50 may include a pair of end plates 51 respectively disposed at both ends of the frame body 52, and a side of the end plate 51 near the air outlet preferably extends beyond the frame body 52 to form an end plate extension 626; wherein: a gap may be left between the first folded edge 622 and the first side of the module body 22 to form the air inlet channel, the air inlet 604 may be formed between the first folded edge 622 and the end plate 51, the second folded edge 624, the second side of the module body 22, and the pair of end plate extensions 626 may jointly enclose the air outlet channel, the air outlet 606 may be disposed on the second folded edge 624, and the first folded edge 622 may gradually approach the module body 22 in a direction from the air inlet 604 to a direction away from the air inlet 604.

To further enhance the cooling effect, a seal strip may be provided between the contact surfaces of the upper cover 30 and the module body 22.

As shown in fig. 1 and 2, an introduction pipe 642 capable of introducing cooling air into the air intake channel may be provided at the air inlet 604, and the introduction pipe 642 may be tapered in a direction from outside the air intake channel to inside the air intake channel; in addition, an outlet tube 644 capable of guiding the cooling air out of the outlet channel may be disposed at the air outlet 606.

The battery module frame 50, the bottom plate 10, and the upper cover 30 will be described in detail below.

Battery module frame 50

The battery module frame 50 may be mounted to the base plate 10, the battery module frame 50 includes a frame body 52, the frame body 52 is provided with a plurality of accommodating chambers capable of accommodating the battery cells of the battery module 20, for example, the frame body 52 may be provided with a plurality of accommodating chambers capable of accommodating single battery cells, that is, each accommodating chamber is capable of accommodating a corresponding single battery cell, the side wall of the frame body 52 is provided with a fixing boss 54, specifically, the fixing boss 54 may be provided at the bottom of the side wall of the frame body 52, the fixing boss 54 may extend in the length direction of the battery module 20, the battery module frame 50 further includes a fixing member 56, and the fixing member 56 is configured to fix the fixing boss 54 to a surface to be fixed, for example, the fixing member 56 may fix the fixing boss 54 to the top surface of the base plate 10. By providing the fixing bosses 54 on the side walls of the frame body 52 and the fixing members 56 capable of fixing the fixing bosses 54 to the surfaces to be fixed, the battery module frame 50 can be better fixed to the surfaces to be fixed, such as the top surface of the base plate 10, and thus the overall structure of the battery module 20 is more stable.

As shown in fig. 2, 15 and 16, the fixing member 56 may include a fixing body 560 capable of being fixed to the surface to be fixed, for example, a mounting through hole 561 may be provided on the fixing body 560, so that a fastener such as a bolt can pass through the mounting through hole 561 to fix the fixing body 560 to the surface to be fixed, such as the top surface of the bottom plate 10, for example, a plurality of mounting through holes 561 may be provided, and the plurality of mounting through holes 561 may be distributed at intervals in the length direction of the battery module 20; the fixing member 56 may include a pressing plate 562 connected to the fixing body 560, the pressing plate 562 may extend in the extending direction of the fixing boss 54, i.e., the length direction of the battery module 20, and the pressing plate 562 may contact the top wall of the fixing boss 54 to be able to press the fixing boss 54 against the surface to be fixed, e.g., the top surface of the base plate 10. Wherein the fixing body 560 and the pressure plate 562 may be formed as a single piece, for example, the fixing member 56 may be formed by extrusion molding using an aluminum profile.

In addition, weight-reducing chambers 568 may be provided in the fixing body 560, and the weight-reducing chambers 568 may extend in the extending direction of the fixing bosses 54, i.e., the lengthwise direction of the battery modules 20, such that, even if the fixing members 56 are provided on the battery module frame 50, the weight of the battery module frame 50 is not substantially increased, resulting in the battery module frame 50 having a suitable weight.

In order to prevent the pressing plate 562 from generating excessive local stress on the fixing boss 54, an elastic sleeve 564 may be disposed outside the pressing plate 562, and the elastic sleeve 564 may also function to absorb tolerance and also function as a sealing insulation protection, wherein the elastic sleeve 564 may be made of a rubber material.

In addition, the fixing member 56 may include a water blocking bar 566 connected to the elastic sheath 564 and disposed at an angle to the pressing plate 562, for example, the water blocking bar 566 may be disposed perpendicular to the pressing plate 562, and the water blocking bar 566 may extend in the extending direction of the fixing boss 54, i.e., the length direction of the battery module 20. By the water bar 566, foreign matters such as external liquid are not easy to enter the battery module frame 50. Preferably, the water bar 566 and the elastomeric sleeve 564 may be formed as a unitary piece.

Can be in set up the cooling gas channel 58 that extends along the width direction of battery module 20 on the wall of holding the chamber, like this, can make hold in corresponding the heat of holding the interior electric core of chamber in time distributes away, has improved battery module 20's safety in utilization, it needs to explain that cooling gas channel 58 can have the confession respectively cooling gas is like the air intake that outside air got into and the cooling gas exhaust air outlet after the confession heat transfer, wherein: the air inlet and the air outlet may be respectively located at both sides in the width direction of the battery module 20, so that the cooling air may enter the corresponding cooling air passage 58 from one side of the battery module 20 and then be discharged from the other side of the battery module 20.

As shown in fig. 2, 13 and 17 in combination, the frame body 52 may include a plurality of mounting plates 520 arranged in the length direction of the battery module 20; a plurality of ribs 580 distributed at intervals along the height direction of the battery module 20 may be disposed on the first surface of the mounting plate 520, the ribs 580 may extend along the width direction of the battery module 20, the cooling air channel 58 is formed between adjacent ribs 580, two adjacent mounting plates 520 may jointly enclose the accommodation chamber, the first surface of one mounting plate 520 of the two adjacent mounting plates 520 faces the second surface of the other mounting plate 520, it should be noted that a partition plate 596 may be disposed between two adjacent mounting plates 520, so that the accommodation chamber can be formed by enclosing two adjacent mounting plates 520 together, and is divided into a plurality of side-by-side partition chambers, and each partition chamber can accommodate a corresponding single battery cell; bosses 540 may be provided at sides of the mounting plates 520 in the width direction of the battery module 20, and the bosses 540 of the same side of the mounting plates 520 may be collectively coupled to form the corresponding fixing bosses 54. The divider plate 596 can contact the rib 580 of the adjacent mounting plate 520.

In order to better define the cells in the accommodating chamber, a first support plate 522 capable of supporting the corresponding cells may be disposed on a first side of the mounting plate 520, and in addition, a second support plate 524 may be disposed on a second side of the mounting plate 520, and the second support plate 524 and the first support plate 522 may be capable of supporting the corresponding cells together after two adjacent mounting plates 520 are opposite to each other.

As shown in fig. 17 and 18 in combination, a connection structure may be provided between the adjacent mounting plates 520, the connection structure being capable of fixing the respective adjacent mounting plates 520 to each other, the connection structure may include an insert 590 and an insert boss 594 having an insert slot 592 into which the insert 590 is inserted, and the respective adjacent mounting plates 520 may be fixed to each other after the insert 590 is inserted into the insert slot 592 of the respective insert boss 594; wherein: the insert 590 may be disposed on one of the mutually opposite faces of the adjacent mounting plates 520, and the insertion projection 594 may be disposed on the other of the mutually opposite faces of the adjacent mounting plates 520.

In order to make the connection between the adjacent mounting plates 520 more stable, a plurality of connection structures may be provided between the adjacent mounting plates 520, for example, a plurality of, e.g., three, insertion bosses 594 having insertion slots 592 may be provided on the top of the first surface of one of the adjacent mounting plates 520, a plurality of, e.g., two, insertion bosses 594 having insertion slots 592 may be provided on the bottom wall of the first support plate 522, and correspondingly, a plurality of inserts 590 respectively fitted with the corresponding insertion slots 592 may be provided on the second surface of the other mounting plate 520.

As shown in fig. 2, 13, and 17, a mounting groove 534 may be provided at the top of the insertion projection 594, both sides of the mounting groove 534 in the length direction of the battery module 20 are formed to be open, and the mounting grooves 534 of the plurality of insertion projections 594 located at the same side are engaged with each other to form a receiving groove capable of passing a mounting band 530 that fixes the plurality of mounting plates 520 to each other.

As shown in fig. 13 and 14, the frame body 52 may include an end plate 51 provided at an end portion of the module body 22, a receiving space capable of receiving the cell is formed between the end plate 51 and the mounting plate 520 adjacent to the end plate 51, and a wall of the end plate 51 facing the mounting plate 520 is provided with a cooling passage 510 through which cooling air passes, so that heat generated from the cell can be timely dissipated. A plurality of ribs 512 may be disposed on a wall of the end plate 51 facing the mounting plate 520 and distributed at intervals along the height direction of the battery module 20, the ribs 512 may extend along the width direction of the battery module 20, and corresponding cooling channels 510 are formed between adjacent ribs 512.

In addition, an upper cover plate 532 can be arranged at the top end of the frame body 52, the upper cover plate 532 can extend along the length direction of the battery module 20, and the top of the battery cell can be covered by the upper cover plate 532 to play a role in protection.

Base plate 10

The base plate 10 may support the battery module frame 50, and the base plate 10 includes a first laminate 12 and a second laminate 14, in which: the first laminate 12 has a support surface 120 capable of supporting the module body 22 of the battery module 20 and a bonding surface facing away from the support surface 120, to which the second laminate 14 is bonded; the base plate 10 also includes a strength enhancing structure disposed on the second ply 14. By arranging the bottom plate 10 as a double-layer structure and arranging the strength reinforcing structure on the second laminate 14, not only is the strength required by the bottom plate 10 ensured, but also the bottom plate 10 is made thinner, the overall weight of the battery pack is reduced, and the improvement of the energy density of the battery pack is facilitated. What need to explain is, module body 22 can include a plurality of electric cores, and a plurality of electric cores are arranged along the thickness direction of electric core, and a plurality of electric cores are length of module body 22 in the ascending size in array direction, and the length direction of battery module 20 is unanimous with the length direction of module body 22, and in addition, the horizontal direction of the length direction of perpendicular to module body 22 is the width of module body 22, and is the same, and the width direction of battery module 20 is unanimous with the width direction of module body 22.

Wherein, can set up according to actual demand intensity additional strengthening as long as can play the effect that intensity is strengthened. Preferably, the strength reinforcing structure may include a first protruding rib 16a provided to the second laminate 14, and the first protruding rib 16a may be provided to be capable of being attached to the attaching surface. Therefore, the strength reinforcing structure is simple in structure, and is beneficial to preparation and cost reduction.

To facilitate the preparation of the second laminate 14, a first recess may be provided on the face of the second laminate 14 facing away from the attachment face, the first recess may protrude from the face of the second laminate 14 near the attachment face, and the first recess may be formed as a first protruding bead 16 a. In the manufacturing process, the first concave portion may be press-formed on the second layer sheet 14, whereby the first projecting rib 16a and the second layer sheet 14 may be integrally formed.

As shown in fig. 7, the first protruding bead 16a may have an elongated shape, and the first protruding bead 16a may extend in the length direction of the battery module 20. It is understood that the first recess may have an elongated shape, and the first recess may extend in the length direction of the battery module 20.

In addition, a plurality of pairs of first protruding ribs 16a may be provided on a surface of the second laminate 14 adjacent to the attachment surface, the plurality of pairs of first protruding ribs 16a may be spaced apart from each other in the width direction of the battery module 20, and the pairs of first protruding ribs 16a may be spaced apart from each other in the length direction of the battery module 20, and more specifically, three pairs of first protruding ribs 16a may be provided and spaced apart from each other in the width direction of the battery module 20, and in each pair of first protruding ribs 16a, the pairs of first protruding ribs 16a may be spaced apart from each other in the length direction of the battery module 20. By providing a plurality of pairs of the first projecting ribs 16a and making the first projecting ribs 16a have the above-described structural form, the overall strength is further improved.

It is understood that a plurality of pairs of the first recesses may be disposed on the surface of the second laminate 14 facing away from the attaching surface, the plurality of pairs of the first recesses may be spaced apart from each other in the width direction of the battery module 20, and the pairs of the first recesses may be spaced apart from each other in the length direction of the battery module 20.

In order to further improve the strength, a second protruding rib 16b may be disposed on the second laminate 14, the second protruding rib 16b may be disposed to be capable of being attached to the attachment surface, an included angle may be formed between an axis of the second protruding rib 16b and an axis of the first protruding rib 16a, for example, the axes may be disposed perpendicularly, for example, the axis of the first protruding rib 16a may be parallel to the length direction of the battery module 20, and the axis of the second protruding rib 16b may be parallel to the width direction of the battery module 20.

A second recess may be provided on the face of the second laminate 14 facing away from the attachment face, the second recess may protrude from the face of the second laminate 14 near the attachment face, and the second recess may be formed as a second protruding bead 16 b. By providing the second recessed portion, it is convenient to manufacture the second laminate 14, for example, the second recessed portion may be formed by punching on the second laminate 14 during the manufacturing process, and thus, the second protruding rib 16b may be integrally formed with the second laminate 14, so that the structure of the entire second laminate 14 is more stable.

As shown in fig. 2, the second projecting rib 16b may have an elongated shape, and the second projecting rib 16b may extend in the width direction of the battery module 20, and by providing the second projecting rib 16b, the overall strength of the second laminate 14 may be further improved. It is understood that the second recess may have an elongated shape, and the second recess may extend in the width direction of the battery module 20.

A plurality of second protruding ribs 16b may be provided on a surface of the second laminate 14 adjacent to the attaching surface, and the plurality of second protruding ribs 16b may be spaced apart along the length direction of the battery module 20. For example, three second projecting ribs 16b may be provided, wherein one second projecting rib 16b may space the pair of first projecting ribs 16a apart, and the remaining two second projecting ribs 16b may be respectively provided at the outermost sides of the pair of first projecting ribs 16 a. In addition, it can be understood that a plurality of second recesses may be disposed on the surface of the second laminate 14 facing away from the attaching surface, and the plurality of second recesses may be spaced along the length direction of the battery module 20.

In order to make the bottom plate 10 more stably support the module body 22 of the battery module 20, a support boss 18 may be disposed on a surface of the second layer plate 14 facing away from the attachment surface, the support boss 18 may be configured to support the bottom plate 10, and in addition, the support boss 18 may be disposed to effectively protect the first rib 16a and the second rib 16 b. Preferably, a plurality of supporting bosses 18 can be provided, and the plurality of supporting bosses 18 can be uniformly distributed on the surface of the second layer board 14 facing away from the abutting surface.

The supporting boss 18 may be cylindrical, and two ends of the cylindrical supporting boss 18 form open ends; a first through-hole, which communicates with the open end and through which a fixing member for fixing the first and

second laminate sheets

12 and 14 to a surface to be fixed, such as a surface of a vehicle on which a battery pack is mounted, passes, may be provided on the first laminate sheet 12, while a second through-hole, which corresponds to the first through-hole, may be provided on the second laminate sheet 14. It is understood that the fixing member such as a bolt may be respectively passed through the first and second through holes and fixed to the surface to be fixed after passing through the support bosses 18.

As shown in fig. 2 and 7, a first flange 110 extending in a direction away from the module body 22 may be provided on a side of the first layer plate 12, and a second flange 112 extending in a direction away from the module body 22 and capable of being fitted to the first flange 110 may be provided on a side of the second layer plate 14. The fit between the first and

second flanges

110, 112 provides a stronger fit between the first and

second plies

12, 14.

Upper cover 30

The upper cover 30 includes an inner plate 32 adjacent to the module body 22 of the battery module 20 and an outer plate 34 attached to an outer wall surface of the inner plate 32; the upper cover 30 further includes a first strength enhancing mechanism disposed on the outer laminate 34. By arranging the upper cover 30 to have a double-layer structure and arranging the strength reinforcing mechanism on the outer plate 34, not only is the strength required by the upper cover 30 ensured, but also the upper cover 30 is made thinner, the overall weight of the battery pack is reduced, and the improvement of the energy density of the battery pack is facilitated.

As shown in fig. 8, the first strength reinforcing means may include first reinforcing beads 36a provided to the outer plate 34, and the first reinforcing beads 36a may protrude from the outer wall surface of the outer plate 34. Therefore, the first strength reinforcement structure is simple, and is beneficial to preparation and cost reduction.

In addition, outer plywood 34 can set up a pair of outer turn-ups 340 including the outer plywood body that the lid was located the top of module body 22 with set up in the both sides relative each other of outer plywood body, and first strengthening rib 36a can set up in outer plywood body, and outer turn-ups 340 can extend towards the bellied direction that deviates from first strengthening rib 36a, and like this, outer plywood body and a pair of outer turn-ups 340 enclose jointly and synthesize both ends and form the outer cover body 35 of open-ended, outer plywood 34 to can cover the outside of establishing at module body 22. Wherein, the outer layer folded edge 340 and the outer layer plate body can be formed into an integrated piece.

In order to further improve the strength of the outer cover 35, a second reinforcing rib 36b may be provided on the outer folded edge 340, and the second reinforcing rib 36b may protrude from the outer wall surface of the outer folded edge 340.

The first reinforcing bead 36a may include a plurality of pairs of supporting reinforcing beads 360a, the pairs of supporting reinforcing beads 360a are spaced apart from each other and opposed to each other, and the pairs of supporting reinforcing beads 360a support the electrical component together, and mounting holes through which fasteners, such as bolts, for fastening the electrical component may pass may be formed in the supporting reinforcing beads 360 a. It should be noted that the electrical component may include a Battery Management System (BMS). Specifically, a plurality of pairs of the support beads 360a may be provided at intervals in the longitudinal direction of the battery module 20, and the pairs of the support beads 360a may be provided at intervals in the width direction of the battery module 20, and it can be understood that the support beads 360a may extend in the longitudinal direction of the battery module 20.

A plurality of second reinforcing ribs 36b may be provided at the outer layer flap 340; the first reinforcing beads 36a may include a plurality of side reinforcing beads 362a disposed at the same side of the outer plate body and respectively connected to the corresponding second reinforcing beads 36b adjacent to the side, and the plurality of side reinforcing beads 362a may be disposed at intervals in the length direction of the battery module 20. By providing a plurality of side reinforcing ribs 362a corresponding to the plurality of second reinforcing ribs 36b one to one, and integrally connecting the corresponding second reinforcing ribs 36b and side reinforcing ribs 362a to each other, the strength of the outer cover body 35, i.e., the outer layer plate 34, can be greatly improved.

In order to facilitate the arrangement of the supporting ribs 360a on the outer plate body, a first concave pit may be arranged on the inner wall surface of the outer plate body close to the inner plate 32, and the first concave pit may protrude from the outer wall surface of the outer plate body, and the first concave pit may be formed as the supporting ribs 360 a. In the preparation process, the first concave recesses may be punched in the outer plate body, and thus, the support ribs 360a and the outer plate body may be integrally formed.

In addition, a second recess may be provided on an inner wall surface of the outer plate body close to the inner plate 32, the second recess may protrude from the outer wall surface of the outer plate body, and the second recess may be formed as an edge bead 362 a; also, the second recesses may be punched in the outer layer main body during the preparation process, whereby the edge beads 362a may be integrally formed with the outer layer main body, thus facilitating the provision of the edge beads 362a in the outer layer main body.

In addition, a third recess may be provided on an inner wall surface of the outer-layer turned-over edge 340 close to the module body 22, the third recess may protrude from an outer wall surface of the outer-layer turned-over edge 340, and the third recess may be formed as the second reinforcing rib 36 b. The third recess may be formed by stamping the outer fold 340 during the manufacturing process, whereby the second stiffener 36b may be integrally formed with the outer plate 34, thereby facilitating the provision of the second stiffener 36b on the outer fold 340.

In order to fix the outer cover 35, i.e., the outer plate 34, to the bottom plate 10, an outer fixed flanging 342 may be disposed on one side of the outer flanging 340 away from the outer plate body, and the outer fixed flanging 342 may extend toward the direction away from the module body 22, so that the outer fixed flanging 342 may be fixed to the bottom plate 10 by bolts.

As shown in fig. 1 and 2 in combination, a protective cover 39 capable of covering the electrical components such as a battery management system may be provided on the top of the outer layer plate 34, so that the electrical components may be effectively protected.

It is understood that a battery distribution box 602 may be provided at the end plate 51 of the module body 22, and the battery distribution box 602 may be fixed to the base plate 10. As shown in fig. 2 and 10 in combination, the protective cover 39 may include a protective cover body 390 covering the top of the outer panel 34 and an extension cover 392 connected to a first end of the protective cover body 390 capable of covering the top of the battery distribution box.

As shown in connection with fig. 11 and 12, the boot 39 can include an end cap 394 disposed at the second end of the boot body 390 and configured to cover the second port.

As shown in fig. 9, the inner plate 32 may include an inner plate body covering the top of the module body 22 and a pair of inner layer flanges 320 respectively disposed at first sides of the inner plate body opposite to each other and respectively capable of being fitted with the corresponding outer layer flanges 340, so that the overall strength of the upper cover 30 is further improved in case that the upper cover 30 is made to have a proper thickness.

Inner plate body and a pair of inlayer turn-ups 320 can enclose synthetic both ends jointly and form the inlayer cover body 37 that the open end is inner plate 32, and the inlayer cover body 37 can be an organic whole, can set up on the edge of inlayer 32 and prevent kick-back recess 380, through setting up the recess 380 that prevents kick-back, can be so that the difficult rebound behind the shaping of inlayer 32. Preferably, a plurality of anti-rebound grooves 380 may be provided on the edge of the inner plate 32, and the plurality of anti-rebound grooves 380 may be arranged at intervals in the length direction of the battery module 20.

In order to enhance the strength of the inner panel 32, as shown in fig. 9, a strength reinforcement recess 326 may be provided on the top wall of the inner panel body, and preferably, the reinforcement recess 326 may protrude from the surface of the inner panel body facing the module body 22. The strength of the upper cover 30 is also improved by providing the reinforcement recesses 326. Preferably, a plurality of reinforcing depressions 326 may be provided, and the plurality of reinforcing depressions 326 may be arranged at intervals in the length direction of the battery module 20.

In addition, an inner layer fixed flanging 322 may be disposed on one side of the inner layer flanging 320, which is far away from the inner layer plate body, and the inner layer fixed flanging 322 may extend toward a direction far away from the module body 22, so that the inner layer fixed flanging 322 and the outer layer fixed flanging 342 may be fixed by bolts.

It should be noted that the inner plate body may be rectangular, and the top wall of the second side of the inner plate body adjacent to the first side of the inner plate body is provided with a fitting recess 328 capable of fitting with the end plate 51 of the module body 22, so that the upper cover 30 can better seal the module body 22.

A first thermal runaway vent 324 may be provided on the inner plate body, and a second thermal runaway vent 344 corresponding to the first thermal runaway vent 324 may be provided on the outer plate body. In this way, when the heat generated from the module body 22 is excessive, it can be discharged through the first thermal runaway vent 324 and the second thermal runaway vent 344, thereby improving safety in use. In addition, a thermal runaway delivery pipe 646 communicating with the second thermal runaway exhaust port 344 may be provided on the protection cap 39.

It should be noted that the inner layer plate body and the outer layer plate body form the upper cover body 620, and the inner layer folded edge 320 and the corresponding outer layer folded edge 340 form a first folded edge 622 and a second folded edge 624 respectively.

As shown in fig. 3, the battery module 20 may include a bus bar holder, which may include a holder body mounted on the top end of the module body 22 and a bent portion 640 connected to the holder body and capable of mounting a low-voltage plug-in, the bent portion 640 extending through the battery module frame 50, specifically, through the end plate 51 and being bent toward the upper side of the upper cover 30. By providing the bent portion 640, the connection of the low voltage plug-in to the battery management system 600 may be facilitated. In addition, the battery distribution box 602 is disposed at the end plate 51, so that the positive and negative electrodes of the battery module 20 are directly fixed to the battery distribution box 602, and thus, the copper bar is not needed to be connected, thereby saving space and reducing the use of parts.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A battery pack, comprising:

battery module (20), battery module (20) includes module body (22), module body (22) include battery module frame (50) and electric core, battery module frame (50) include frame body (52), be provided with on frame body (52) and hold the chamber that holds of electric core, it is provided with on the wall of chamber to hold the edge cooling gas passageway (58) that the width direction of battery module (20) extends, cooling gas passageway (58) have supply respectively the air intake that the cooling gas got into and the air outlet of the cooling gas exhaust after supplying the heat transfer, wherein: the air inlet and the air outlet are respectively positioned on two sides along the width direction of the battery module (20);

a base plate (10), the base plate (10) being configured to be capable of supporting the battery module (20); and

the battery module comprises an upper cover (30), the upper cover (30) is in a cover body shape, the upper cover (30) covers the outside of the battery module (20) and is installed on the bottom plate (10), the upper cover (30) is provided with an air inlet (604) for cooling air to enter and an air outlet (606) for cooling air to exhaust, an air inlet channel communicated with the air inlet (604) is formed between the upper cover (30) and the first side of the module body (22) provided with the air inlet, and an air outlet channel communicated with the air outlet (606) is formed between the upper cover (30) and the second side of the module body (22) provided with the air outlet;

wherein the dimension of the air inlet channel along the width direction of the battery module (20) is tapered from the air inlet (604) to the direction far away from the air inlet (604);

the side wall of the frame body (52) is provided with a fixing boss (54), the fixing boss (54) extends along the length direction of the battery module (20), the battery module frame (50) comprises a fixing piece (56), the fixing piece (56) comprises a fixing body (560) capable of being fixed on a surface to be fixed and a pressing plate (562) connected to the fixing body (560), the pressing plate (562) extends along the extending direction of the fixing boss (54), and the pressing plate (562) can be in contact with the top wall of the fixing boss (54) to press the fixing boss (54) on the surface to be fixed.

2. The battery pack according to claim 1, wherein the upper cover (30) includes an upper cover body (620) covering the top of the module body (22) and first and second flanges (622, 624) respectively provided at both sides of the upper cover (30) in the width direction of the battery module (20), the first and second flanges (622, 624) each extending toward the base plate (10);

the battery module frame (50) comprises a pair of end plates (51) respectively arranged at two ends of the frame body (52), and one side of each end plate (51) close to the air outlet extends beyond the frame body (52) to form an end plate extension part (626); wherein:

a gap is reserved between the first flanging edge (622) and the first side of the module body (22) to form the air inlet channel, the air inlet (604) is formed between the first flanging edge (622) and the end plate (51), the second flanging edge (624), the second side of the module body (22) and the pair of end plate extending portions (626) jointly enclose to form the air outlet channel, the air outlet (606) is formed in the second flanging edge (624), and the first flanging edge (622) is gradually close to the module body (22) in the direction from the air inlet (604) to the direction far away from the air inlet (604).

3. The battery pack according to claim 2, wherein the frame body (52) includes a plurality of mounting plates (520) arranged in a length direction of the battery module (20);

the first face of mounting panel (520) is provided with along many fins (580) of the direction of height interval distribution of battery module (20), fin (580) are followed the width direction of battery module (20) extends, and is adjacent form between fin (580) cooling air channel (58), and adjacent two mounting panel (520) can enclose jointly and close and form the accommodation chamber, and one of two adjacent mounting panel (520) the first face of mounting panel (520) is towards another the second face of mounting panel (520).

4. A battery pack according to claim 3, wherein a receiving space capable of receiving a cell is formed between the end plate (51) and the mounting plate (520) adjacent to the end plate (51), and a wall of the end plate (51) facing the mounting plate (520) is provided with a cooling passage (510) through which cooling air passes.

5. The battery pack according to claim 1, wherein the battery module (20) includes a bus bar holder including a holder body mounted on a top end of the module body (22), and a bent portion (640) connected to the holder body and capable of mounting a low-voltage plug-in, the bent portion (640) extending out of the battery module frame (50) and being bent toward an upper side of the upper cover (30).

6. The battery pack according to claim 1, wherein the base plate (10) comprises a first laminate sheet (12) and a second laminate sheet (14), wherein: the first laminate (12) is provided with a supporting surface (120) capable of supporting a module body (22) of the battery module (20) and an abutting surface departing from the supporting surface (120), and the second laminate (14) is abutted to the abutting surface; the base plate (10) further comprises a strength reinforcement structure provided to the second laminate (14).

7. The battery pack according to claim 6, wherein the strength reinforcing structure includes a first protruding rib (16a) provided to the second laminate sheet (14), the first protruding rib (16a) being capable of being fitted to the fitting surface.

8. The battery pack according to any one of claims 1 to 7, wherein the upper cover (30) comprises an inner laminate sheet (32) adjacent to the module body (22) of the battery module (20) and an outer laminate sheet (34) attached to an outer wall surface of the inner laminate sheet (32); the upper cover (30) further comprises a first strength reinforcing mechanism arranged on the outer plate (34).

9. The battery pack according to claim 8, wherein the first strength enhancing means includes a first reinforcing rib (36a) provided on the outer plate (34), and the first reinforcing rib (36a) protrudes from the outer wall surface of the outer plate (34).