CN219917373U - Battery pack and electric equipment - Google Patents

Abstract

The utility model discloses a battery pack and electric equipment, wherein the battery pack comprises a battery module, a reinforcing module and a liquid cooling module, the battery module comprises a plurality of battery cell groups, the battery cell groups are arranged at intervals along a first direction, the battery cell groups comprise a plurality of battery cells, the battery cells are arranged at intervals along a second direction, the reinforcing module comprises a plurality of reinforcing beams, the liquid cooling module comprises a plurality of liquid cooling plates, the plurality of liquid cooling plates and the plurality of reinforcing beams are alternately arranged at intervals along the first direction, and a battery cell group is arranged between each adjacent liquid cooling plate and each reinforcing beam; according to the embodiment of the utility model, the plurality of liquid cooling plates and the plurality of reinforcing beams are alternately arranged at intervals along the first direction, so that the strength of the battery pack is enhanced, the phenomenon that the battery pack is easy to generate thermal runaway when being extruded, needled and collided in the related technology is avoided, and the single battery pack is isolated independently by arranging the battery pack between each adjacent liquid cooling plate and the reinforcing beam.

Description

Battery pack and electric equipment

Technical Field

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

Background

The power battery is used as one of core components of the electric automobile and is an energy center of the electric automobile, and the battery pack is used as an energy distribution unit of the power battery, so that the whole automobile can be irreplaceable; at present, when a battery pack is subjected to thermal abuse, electric abuse (overcharge, overdischarge, internal short circuit and the like) or mechanical abuse (extrusion, needling, collision and the like), thermal runaway and explosion ignition of a battery core are easy to occur, if a single battery core is ignited, other battery cores can be subjected to chained thermal runaway, and finally the battery is scrapped.

Therefore, it is currently necessary to improve the mechanical strength of the battery pack and isolate adjacent cells to avoid the occurrence of the thermal runaway phenomenon of linkage.

Disclosure of Invention

The embodiment of the utility model provides a battery pack and electric equipment, which are used for solving or at least partially solving the defects existing in the background technology.

In a first aspect, embodiments of the present utility model provide a battery pack including:

the battery module comprises a plurality of battery cell groups, wherein the battery cell groups are arranged at intervals along a first direction, the battery cell groups comprise a plurality of battery cells, and the battery cells are arranged at intervals along a second direction;

the reinforcing module comprises a plurality of reinforcing beams;

the liquid cooling module comprises a plurality of liquid cooling plates, the liquid cooling plates and the stiffening beams are alternately arranged along the first direction at intervals, and one electric core group is arranged between each adjacent liquid cooling plate and each stiffening beam.

In an embodiment, the battery pack further comprises a box body, wherein the box body comprises a bottom plate and a plurality of side beams, and the side beams are fixedly arranged on the edges of the bottom plate to form a containing cavity in a surrounding mode;

the battery module, the reinforcing module and the liquid cooling module are arranged in the accommodating cavity, and two ends of the reinforcing beam are fixedly connected with the side beam respectively.

In an embodiment, the reinforcing beam and/or the liquid cooling plate are/is abutted against the outer peripheral surfaces of the electric cores at two sides of the reinforcing beam and/or the liquid cooling plate, and the reinforcing beam and/or the liquid cooling plate are/is matched with the outer peripheral surfaces of the electric cores.

In an embodiment, the battery cell is a cylindrical battery cell, and the reinforcing beam and/or the liquid cooling plate is in a corrugated structure so as to be matched with the outer peripheral surface of the cylindrical battery cell.

In an embodiment, a plurality of first concave parts and a plurality of second concave parts are arranged on one side, close to the reinforcing beam, of the side beam, and the plurality of first concave parts and the plurality of second concave parts are alternately arranged at intervals along the first direction;

a first inserting part is arranged on one side, close to the boundary beam, of the liquid cooling plate, and one first inserting part is inserted and arranged corresponding to one first concave part;

and a second inserting part is arranged on one side, close to the side beam, of the stiffening beam, and one second inserting part is inserted and arranged corresponding to one second concave part.

In an embodiment, the second plugging portion and the second concave portion are fixed by welding.

In an embodiment, the battery pack further includes a gel unit, and the gel unit is sleeved on the outer surface of each of the electric cores.

In an embodiment, the colloid unit includes a foaming glue, a plurality of openings are formed in the foaming glue, one opening corresponds to one cell, and the outer side wall of the cell is adhered to the inner wall of the opening.

In an embodiment, the box body further comprises a support frame, wherein the support frame is arranged between the bottom plate and the battery module, and the support frame is fixedly connected with the reinforcing module and the bottom plate respectively;

the support frame is provided with a plurality of mounting grooves, the depth of each mounting groove is smaller than the thickness of the support frame, one mounting groove corresponds to one battery cell, and the battery cells are placed in the mounting grooves.

In an embodiment, a pressure release cavity is formed by enclosing the support frame, the bottom plate and the side beams;

the support frame is further provided with a plurality of through holes, one through hole corresponds to one installation groove, the aperture of the through hole is smaller than the diameter of the installation groove, the through hole penetrates through the installation groove, and the through hole is communicated with the pressure relief cavity.

In an embodiment, one of the supporting frame and the reinforcing beam is provided with a plurality of fixing holes, the other one is provided with a plurality of protrusions, one protrusion is arranged corresponding to one fixing hole, and the protrusions are clamped in the fixing holes.

In one embodiment, the protrusion and the fixing hole are fixed by welding.

In an embodiment, the battery pack further includes a battery module collection assembly, the battery module collection assembly set up in the battery module is kept away from one side of bottom plate, the battery module collection assembly includes:

the fixing frame is provided with a mounting hole;

and the bus bars are embedded into the mounting holes, are in contact with the battery cells and are used for electrically connecting a plurality of the battery cells.

In an embodiment, the busbar includes a plurality of busbar monomers and a plurality of linking arm, the busbar monomers include anodal connecting portion and negative pole connecting portion, the mounting hole includes anodal mounting hole and negative pole mounting hole, anodal connecting portion pass through anodal mounting hole with the anodal electricity of electric core is connected, negative pole connecting portion pass through the negative pole mounting hole with the negative pole electricity of electric core is connected, the linking arm is used for connecting adjacent two the busbar monomers.

In a second aspect, an embodiment of the utility model provides an electrical device, where the electrical device includes any of the battery packs described above.

The embodiment of the utility model has the beneficial effects that: the embodiment of the utility model provides a battery pack and electric equipment, wherein the battery pack comprises a battery module, a reinforcing module and a liquid cooling module, the battery module comprises a plurality of battery cell groups, the plurality of battery cell groups are arranged at intervals along a first direction, the battery cell groups comprise a plurality of battery cells, the plurality of battery cells are arranged at intervals along a second direction, the reinforcing module comprises a plurality of reinforcing beams, the liquid cooling module comprises a plurality of liquid cooling plates, the plurality of liquid cooling plates and the plurality of reinforcing beams are alternately arranged at intervals along the first direction, and one battery cell group is arranged between each adjacent liquid cooling plate and each adjacent reinforcing beam; according to the embodiment of the utility model, the plurality of liquid cooling plates and the plurality of reinforcing beams are alternately arranged at intervals along the first direction, so that the strength of the battery pack is enhanced, the phenomenon that a battery cell is easy to be out of control when the battery pack is extruded, needled and collided in the related art is avoided, and the battery cell group is arranged between each adjacent liquid cooling plate and each adjacent reinforcing beam, so that the single battery cell group is independently isolated.

Drawings

In order to more clearly illustrate the technical solutions of the present embodiments, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is an exploded view of a battery pack according to an embodiment of the present utility model;

FIG. 3 is a schematic structural diagram of a case according to an embodiment of the present utility model;

FIG. 4 is a schematic structural diagram of a reinforcement module according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a liquid cooling module according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a support frame according to an embodiment of the present utility model;

FIG. 7 is an enlarged schematic view at A of FIG. 6;

fig. 8 is a schematic structural diagram of a battery module collection and integration assembly according to an embodiment of the present utility model;

fig. 9 is an enlarged schematic view at B of fig. 8.

Description of the reference numerals

1-a battery pack; 10-a box body; 20-a battery module; 30-a liquid cooling module; 40-colloid units; 50-case cover; 60-collecting an integrated component by a battery module;

10A-a receiving cavity; 10B-a first recess; 10C-a second recess;

10B 1-a first sub-recess; 10C 1-second sub-recess; 10B 2-third sub-recess; 10C 2-fourth sub-recess;

12-a reinforcement module; 13-a cross beam; 14-supporting frames;

111-a bottom plate; 112-side beams; 112A-a first side rail; 112B-a second side rail;

12B-bump; 121-reinforcing beams; 121A-a second plug-in portion;

121 A1-a third sub-plug; 121 A2-fourth sub-plug;

14A-mounting slots; 14 A1-a through hole; 14B-fixing holes;

200-cell groups; 21-an electric core;

31-a liquid cooling plate; 31A-a first plug-in portion;

31A-a first sub-plug; 31B-a second sub-plug;

41-foaming glue;

61-fixing frame; 62-bus bars;

61A-mounting holes; 61 A1-positive mounting holes; 61 A2-negative mounting holes;

621-a busbar monomer; 622-connecting arm; 621A-positive electrode connection; 621B-negative electrode connection.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

The embodiment provides a battery pack and electric equipment. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.

Please combine fig. 1-9, this embodiment provides a battery pack and electric equipment, the battery pack 1 includes a battery module 20, a reinforcing module 12 and a liquid cooling module 30, the battery module 20 includes a plurality of electric core groups 200, a plurality of electric core groups 200 are arranged along a first direction X at intervals, the electric core groups 200 include a plurality of electric cores 21, a plurality of electric cores 21 are arranged along a second direction Y at intervals, the reinforcing module 12 includes a plurality of reinforcing beams 121, the liquid cooling module 30 includes a plurality of liquid cooling plates 31, a plurality of liquid cooling plates 31 and a plurality of reinforcing beams 121 are arranged along the first direction X at intervals alternately, and a battery core group 200 is arranged between each adjacent liquid cooling plate 31 and each reinforcing beam 121.

It should be noted that, in the related art, when the battery pack is subjected to thermal abuse, electrical abuse (overcharge, overdischarge, internal short circuit, etc.), or mechanical abuse (extrusion, needling, collision, etc.), thermal runaway and explosion fire of the battery cells are easy to occur, and if a single battery cell fires, other battery cells can be caused to undergo chained thermal runaway, which ultimately leads to rejection of the battery.

It can be appreciated that, in this embodiment, a plurality of liquid cooling plates and a plurality of reinforcing beams are alternately arranged along the first direction at intervals, so as to enhance the strength of the battery pack, avoid the phenomenon that in the related art, when the battery pack is extruded, needled and collided, the battery cell is easy to be out of control, and independently isolate a single battery cell group by arranging a battery cell group between every two adjacent liquid cooling plates and the reinforcing beams.

The technical scheme of the present utility model will now be described with reference to specific embodiments.

In one embodiment, please refer to fig. 1, 2 and 3; fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model; fig. 2 is an exploded view of a battery pack according to an embodiment of the present utility model; fig. 3 is a schematic structural diagram of a case according to an embodiment of the present utility model.

In the present embodiment, the battery pack 1 includes a case cover 50 and a case body 10; the case 10 includes a bottom plate 111 and a plurality of side beams 112, the side beams 112 are fixedly disposed at edges of the bottom plate 111 to form a receiving cavity 10A, and the battery module 20, the reinforcing module 12 and the liquid cooling module 30 are disposed in the receiving cavity 10A; the case cover 50 is disposed opposite to the bottom plate 111, and the case cover 50 is used to seal the accommodating chamber 10A.

In the present embodiment, the case 10 includes a cross member 13, the bottom plate 111, and a plurality of side members 112; wherein, a plurality of boundary beams 112 connect gradually in order to enclose and form annular structure, the both ends of crossbeam 13 respectively with boundary beam 112 butt, so that bottom plate 111, crossbeam 13 and a plurality of boundary beam 112 form be used for placing battery module 20 hold chamber 10A.

Further, the reinforcing module 12 includes a plurality of reinforcing beams 121, the plurality of reinforcing beams 121 are disposed at intervals along the first direction X, and two ends of the reinforcing beam 121 are fixedly connected with the side beams 112 respectively; the liquid cooling module 30 includes a plurality of liquid cooling plates 31, a plurality of the liquid cooling plates 31 are disposed along the first direction X at intervals, wherein a plurality of the liquid cooling plates 31 and a plurality of the reinforcing beams 121 are disposed along the first direction X at intervals alternately, and a battery cell group 200 is disposed between each adjacent liquid cooling plate 31 and each adjacent reinforcing beam 121.

The battery module 20 includes a plurality of battery cell groups 200, wherein the plurality of battery cell groups 200 are arranged at intervals along the first direction X, the battery cell group 200 includes a plurality of battery cells 21, and the plurality of battery cells 21 are arranged at intervals along the second direction Y, wherein one battery cell group 200 is arranged between the adjacent liquid cooling plate 31 and the reinforcing beam 121; specifically, in this embodiment, the reinforcing beam 121 and/or the liquid cooling plate 31 are in contact with the outer peripheral surfaces of the electric cells 21 on both sides thereof, and the reinforcing beam 121 and/or the liquid cooling plate 31 are adapted to the outer peripheral surfaces of the electric cells 21; preferably, in this embodiment, the reinforcing beam 121 and the liquid cooling plate 31 are both abutted against the outer peripheral surfaces of the electric cells 21 on both sides thereof, and the reinforcing beam 121 and the liquid cooling plate 31 are both adapted to the outer peripheral surfaces of the electric cells 21.

Specifically, in this embodiment, the battery cell 21 is a cylindrical battery cell, one battery cell group 200 includes a plurality of cylindrical battery cells, the reinforcing beam 121 is abutted against the outer circumferential surface of the cylindrical battery cell 21 on both sides thereof, the reinforcing beam 121 is a serpentine corrugated structure adapted to the cylindrical surface of the cylindrical battery cell 21, the liquid cooling plate 31 is abutted against the outer circumferential surface of the cylindrical battery cell 21 on both sides thereof, and the liquid cooling plate 31 is a serpentine corrugated structure adapted to the cylindrical surface of the cylindrical battery cell 21.

It should be noted that, in this embodiment, the thickness of the reinforcement beam 121 is greater than or equal to 1 mm and less than or equal to 4 mm, the inner diameter lengths of the adjacent liquid cooling plates 31 are equal, the first direction is denoted by X, the second direction is denoted by Y, and the first direction X and the second direction Y form a preset included angle; preferably, the thickness of the reinforcement beam 121 is one of 1 mm, 2 mm and 3 mm, and the predetermined angle is a right angle.

It can be appreciated that, in this embodiment, the reinforcement beams 121 are configured to have a serpentine corrugated structure adapted to the cylindrical surface of the battery cell 21, so that the space utilization rate of the battery pack 1 is increased by adding the reinforcement beams 121 in the gaps between adjacent battery cell groups 200, and the reinforcement beams 121 are uniformly distributed, so that stress can be effectively dispersed, stress concentration can be reduced, and the strength of the battery pack 1 can be further enhanced; meanwhile, by arranging the liquid cooling plate 31 to be abutted against the outer peripheral surfaces of the electric cores 21 on two sides of the liquid cooling plate, the liquid cooling plate 31 is of a serpentine corrugated structure matched with the cylindrical surface of the electric core 21, so that the liquid cooling plate 31 tube can be attached to the outer peripheral surface of the cylindrical electric core 21, and the cooling effect is improved; and, a plurality of liquid cooling boards 31 with a plurality of stiffening beam 121 is followed the alternate interval sets up in first direction X, and every adjacent liquid cooling board 31 with be equipped with between the stiffening beam 121 one electric core group 200 to keep apart singly electric core group 200, avoid if the condition that electric core group 200 is on fire appears, can make other electric core group 200 take place the thermal runaway of chain, finally lead to the rejection of battery.

Further, please refer to fig. 1, 3, 4 and 5; fig. 4 is a schematic structural diagram of a reinforcement module according to an embodiment of the present utility model; fig. 5 is a schematic structural diagram of a liquid cooling module according to an embodiment of the present utility model.

In this embodiment, a plurality of first concave portions 10B and a plurality of second concave portions 10C are provided on a side of the side beam 112 adjacent to the reinforcement beam 121, and the plurality of first concave portions 10B and the plurality of second concave portions 10C are alternately arranged at intervals along the first direction X; a first plugging portion 31A is disposed on a side of the liquid cooling plate 31 adjacent to the side beam 112, and one of the first plugging portion 31A is plugged into one of the first concave portions 10B; a second plugging portion 121A is disposed on a side of the reinforcement beam 121 adjacent to the side beam 112, and one of the second plugging portions 121A is plugged into one of the second concave portions 10C; specifically, the second socket portion 121A and the second recess portion 10C are fixed by welding.

In this embodiment, the box 10 further includes a first side beam 112A and a second side beam 112B that are disposed opposite to each other, one end of the beam 13 is abutted against the first side beam 112A, the other end of the beam 13 is abutted against the second side beam 112B, where the reinforcement beam 121 is located between the first side beam 112A and the second side beam 112B, and the extension direction of the reinforcement beam 121 is parallel to the extension direction of the beam 13, the liquid cooling plate 31 is located between the first side beam 112A and the second side beam 112B, and the extension direction of the liquid cooling plate 31 is parallel to the extension direction of the beam 13.

The first concave portion 10B includes a first sub-concave portion 10B1 and a third sub-concave portion 10B2, and the second concave portion 10C includes a second sub-concave portion 10C1 and a fourth sub-concave portion 10C2; specifically, the first side beam 112A is provided with a plurality of first sub-recesses 10B1 and second sub-recesses 10C1 near the reinforcing module 12, a plurality of first sub-recesses 10B1 and a plurality of second sub-recesses 10C1 are alternately arranged along the first direction X, the second side beam 112B is provided with a plurality of third sub-recesses 10B2 and a plurality of fourth sub-recesses 10C2 near the reinforcing module 12, a plurality of third sub-recesses 10B2 and a plurality of fourth sub-recesses 10C2 are alternately arranged along the first direction X, wherein one first sub-recess 10B1 is arranged corresponding to one third sub-recess 10B2, one liquid cooling plate 31 is positioned between one first sub-recess 10B1 and one third sub-recess 10B2, one second sub-recess 10C1 is arranged corresponding to one fourth sub-recess 10C2, and one reinforcing beam 121 is positioned between one first sub-recess 10C1 and one fourth sub-recess 10C 2.

Wherein the first plugging portion 31A includes a first sub-plugging portion 31A1 and a second sub-plugging portion 31A2, and the second plugging portion 121A includes a third sub-plugging portion 121A1 and a fourth sub-plugging portion 121A2; specifically, the liquid cooling plate 31 includes a first sub-plugging portion 31A1 and a second sub-plugging portion 31A2, the liquid cooling plate 31 is plugged by the first sub-plugging portion 31A1 and the first sub-concave portion 10B1, the liquid cooling plate 31 is plugged by the second sub-plugging portion 31A2 and the third sub-concave portion 10B2, the reinforcing beam 121 includes a third sub-plugging portion 121A1 and a fourth sub-plugging portion 121A2, the reinforcing beam 121 is plugged by the third sub-plugging portion 121A1 and the second sub-concave portion 10C1, the reinforcing beam 121 is plugged by the fourth sub-plugging portion 121A2 and the fourth sub-concave portion 10C2, and the third sub-plugging portion 121A1 and the second sub-concave portion 10C1 are fixed by welding, and the fourth sub-plugging portion 121A2 and the fourth sub-concave portion 10C2 are fixed by welding.

It can be understood that in this embodiment, by arranging that the liquid cooling plate 31 is inserted and connected through the first sub-insertion portion 31A1 and the first sub-recess 10B1, the liquid cooling plate 31 is inserted and connected through the second sub-insertion portion 31A2 and the third sub-recess 10B2, the reinforcing beam 121 is inserted and connected through the third sub-insertion portion 121A1 and the second sub-recess 10C1, and the reinforcing beam 121 is inserted and connected through the fourth sub-insertion portion 121A2 and the fourth sub-recess 10C2, so that when the liquid cooling plate 31 and the reinforcing beam 121 are assembled, the assembly efficiency is improved, and the productivity of the battery pack 1 is further improved; meanwhile, by arranging the first sub-concave portion 10B1 and the third sub-concave portion 10B2 for limiting the liquid cooling plate 31, the third sub-plug portion 121A1 and the second sub-concave portion 10C1 are fixed by welding, the fourth sub-plug portion 121A2 and the fourth sub-concave portion 10C2 are fixed by welding, and the second sub-concave portion 10C1 and the fourth sub-concave portion 10C2 are used for limiting the reinforcing beam 121, so that the liquid cooling plate 31 and the reinforcing beam 121 can be prevented from moving when the battery pack 1 is subjected to external impact, and the stability of the battery pack 1 is improved.

In this embodiment, the positions of the concave portions and the plugging portions are not particularly limited, and in this embodiment, only the side of the side beam 112 near the reinforcing beam 121 is provided with the plurality of first concave portions 10B and the plurality of second concave portions 10C, the plurality of first concave portions 10B and the plurality of second concave portions 10C are alternately arranged along the first direction X, the side of the liquid cooling plate 31 near the side beam 112 is provided with the first plugging portion 31A, and the side of the reinforcing beam 121 near the side beam 112 is provided with the second plugging portion 121A, which is an example of the technical scheme of the present utility model.

For example, in another embodiment, a plurality of first plugging portions 31A and a plurality of second plugging portions 121A are disposed on a side of the side beam 112 close to the reinforcing beam 121, a plurality of first plugging portions 31A and a plurality of second plugging portions 121A are alternately disposed along the first direction X, a first concave portion 10B is disposed on a side of the liquid cooling plate 31 close to the side beam 112, and a second concave portion 10C is disposed on a side of the reinforcing beam 121 close to the side beam 112.

Further, in the present embodiment, the battery pack 1 further includes a gel unit 40, and the gel unit 40 is sleeved on the outer surface of each of the electric cells 21; specifically, the gel unit 40 is disposed in the accommodating cavity 10A, the gel unit 40 includes, but is not limited to, a foam adhesive 41, and a plurality of openings (not shown in the drawing) are formed in the foam adhesive 41, one of the openings is disposed corresponding to one of the battery cells 21, and an outer side wall of the battery cell 21 is adhered to an inner wall of the opening.

Specifically, the battery cells 21 pass through the openings and are fixed on the bottom plate 111, and the foaming glue fills the gap space between the adjacent battery cells 21, so that the adjacent battery cells 21 are prevented from contacting and colliding in the use process, and a buffering effect is achieved.

It can be appreciated that, in this embodiment, by adopting the reinforcing beam 121, the liquid cooling plate 31 and the colloid unit 40 to make the single electric core 21 independently perform isolation and fire prevention, heat transfer from the single electric core 21 to the side single electric core 21 after thermal runaway can be prevented, so that a plurality of even all electric cores 21 are prevented from being subjected to linkage thermal runaway due to thermal runaway of the single electric core 21 in the related art, so that the electric core 21 cannot be replaced and can only be scrapped, thereby increasing the defect of use cost of the battery module 20 and improving the safety of the battery pack 1.

Further, please refer to fig. 1, fig. 2, fig. 6 and fig. 7; fig. 6 is a schematic structural diagram of a support frame 14 according to an embodiment of the present utility model; fig. 7 is an enlarged schematic view at a of fig. 6.

In this embodiment, the case 10 further includes a support frame 14, the support frame 14 is disposed between the bottom plate 111 and the battery module 20, the support frame 14 is fixedly connected with the reinforcing module 12 and the bottom plate 111 respectively, the support frame 14 is provided with a plurality of mounting grooves 14A, the depth of the mounting groove 14A is smaller than the thickness of the support frame 14, one of the mounting grooves 14A is disposed corresponding to one of the battery cells 21, and the battery cells 21 are disposed in the mounting groove 14A.

Specifically, in this embodiment, the mounting groove 14A is a groove formed by fastening the support frame 14 inward toward a side far away from the battery module 20, and the shape of the mounting groove 14A matches the shape of the battery cell 21; further, the mounting groove 14A is cylindrical, and the inner wall of the mounting groove 14A abuts against the outer peripheral surface of the battery cell 21, in this embodiment, by setting the battery cell 21 to be placed in the mounting groove 14A, one of the accommodating grooves is set corresponding to one of the battery cells 21, and when assembling, a plurality of battery cells 21 can be installed at the same time, so that the assembling efficiency of the battery pack 1 is greatly improved, the assembling precision is ensured, and automation is easy to realize; wherein, can adopt the structural adhesive to carry out fixed connection with support frame 14 with electric core 21, connect convenient and reliable, effectively avoid electric core 21 is not hard up drops.

In this embodiment, a pressure relief cavity is formed by enclosing the support frame 14, the bottom plate 111, and the side beam 112; the support frame 14 is further provided with a plurality of through holes 14A1, one through hole 14A1 is arranged corresponding to one mounting groove 14A, the aperture of the through hole 14A1 is smaller than the diameter of the mounting groove 14A, the through hole 14A1 penetrates through the mounting groove 14A, and the through hole 14A1 is communicated with the pressure relief cavity.

Specifically, in this embodiment, the through hole 14A1 is a pressure relief hole, the aperture of the through hole 14A1 is smaller than the diameter of the mounting groove 14A, the pressure relief cavity is communicated with the mounting groove 14A through the through hole 14A1, and the design of the pressure relief cavity reduces the impact generated when the battery cell 21 bursts, so that the working safety of the battery module 20 is improved; meanwhile, the through hole 14A1 is arranged to enable the heat of the battery cell 21 or the gas generated when the battery is out of control to be rapidly led out from the bottom of the battery cell 21, so that the heat dissipation effect is enhanced, and the safety performance of the structure of the battery pack 1 is improved; in this embodiment, the material of the case is a metal material, the supporting frame 14 is made of plastic or other materials with good insulation, and the placement portion can block the bottom surface of the battery cell 21 from contacting the bottom plate 111, so as to perform an insulation protection function.

In this embodiment, one of the supporting frame 14 and the reinforcing beam 121 is provided with a plurality of fixing holes 14B, the other is provided with a plurality of protrusions 12B, one of the protrusions 12B is disposed corresponding to one of the fixing holes 14B, and the protrusions 12B are clamped in the fixing holes 14B.

Preferably, in the present embodiment, the supporting frame 14 includes a plurality of fixing holes 14B, and the fixing holes 14B penetrate through the supporting frame 14; the reinforcing beam 121 includes a plurality of protrusions 12B on a side close to the supporting frame 14, one of the protrusions 12B is disposed corresponding to one of the fixing holes 14B, the protrusions 12B are clamped in the fixing holes 14B, and the protrusions 12B are fixed with the supporting frame 14 by welding; preferably, the protrusion 12B of the reinforcement beam 121 is fixed to the support frame 14 by spot welding, wherein the welding point is located at a side of the support frame 14 near the bottom plate 111.

It can be appreciated that the support frame 14 is provided with a plurality of mounting grooves 14A, the rigidity of the support frame 14 is reduced by the mounting grooves 14A, and in this embodiment, the protrusions 12B of the reinforcement beams 121 are fixed with the support frame 14 by spot welding, so that the rigidity of the support frame 14 is increased, and the stability of the box 10 is further improved.

Specifically, in this embodiment, the fixing hole 14B is located between two adjacent mounting grooves 14A, the fixing hole 14B is spaced from the mounting groove 14A, the aperture of the fixing hole 14B is smaller than that of the through hole 14A1, one of the protrusions 12B and one of the fixing holes 14B corresponding thereto, the protrusion 12B passes through the fixing hole 14B, and the protrusion 12B is fixed to the support frame 14 by welding, and the welding point thereof is located on the side of the support frame 14 away from the reinforcing beam 121.

It can be appreciated that in this embodiment, the support frame 14 includes a plurality of fixing holes 14B, the side of the reinforcement beam 121 near the support frame 14 includes a plurality of protrusions 12B, the protrusions 12B are clamped in the fixing holes 14B, and the protrusions 12B are fixed with the support frame 14 by welding, so as to enhance the fixing strength between the reinforcement beam 121 and the support frame 14, thereby enhancing the structural strength of the box 10; meanwhile, when a collision occurs, the supporting frame 14 may provide a certain supporting force to each battery module 20, so as to effectively improve the installation stability of each battery module 20, thereby further improving the protection effect of the case 10 on each battery module 20.

Further, please refer to fig. 1, fig. 2, fig. 8 and fig. 9; fig. 8 is a schematic structural diagram of a battery module collection and integration assembly according to an embodiment of the present utility model; fig. 9 is an enlarged schematic view at B of fig. 8.

In this embodiment, the battery pack 1 further includes a battery module collection assembly 60 (Cell Contacting System, CCS assembly), the battery module collection assembly 60 is disposed on a side of the battery module 20 away from the bottom plate 111, the battery module collection assembly 60 includes a fixing frame 61 and a bus bar 62, the fixing frame 61 is provided with a mounting hole 61A, the bus bar 62 is embedded in the mounting hole 61A, and the bus bar 62 is disposed in contact with the battery cells 21 and electrically connects a plurality of the battery cells 21.

Specifically, the bus bar 62 is used for electrically connecting a plurality of the electric cells 21, the bus bar 62 includes a bus bar unit 621 and a connecting arm 622, the bus bar unit 621 includes a positive electrode connecting portion 621A and a negative electrode connecting portion 621B, the mounting hole 61A includes a positive electrode mounting hole 61A1 and a negative electrode mounting hole 61A2, the positive electrode connecting portion 621A is electrically connected with the positive electrode of the electric cell 21 through the positive electrode mounting hole 61A1, the negative electrode connecting portion 621B is electrically connected with the negative electrode of the electric cell 21 through the negative electrode mounting hole 61A2, and the connecting arm 622 is used for connecting two adjacent bus bar units 621; it can be appreciated that, in this embodiment, in order to electrically connect the plurality of electric cells 21, the bus bar 62 is disposed at the top of the electric cell 21, and the mounting hole 61A for mounting the bus bar 62 is disposed on the fixing frame 61, and the bus bar 62 is embedded in the mounting hole 61A and is in contact with the electric cell 21, so that the problem of short circuit between adjacent electric cells 21 caused by dislocation of the bus bar 62 is effectively prevented.

The embodiment provides electric equipment, which comprises the battery pack in any one of the embodiments.

It will be appreciated that the battery pack has been described in detail in the above embodiments, and the description thereof will not be repeated.

The battery pack comprises a battery module which is used as a power supply of electric equipment, so that the electric equipment also has various advantages of the battery module, and the integral structure of the electric equipment is facilitated to be simplified; wherein the electric equipment can be an automobile, an aircraft, mechanical production equipment and the like.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above describes a battery pack and electric equipment provided in this embodiment in detail, and specific examples are applied to illustrate the principle and implementation of the present utility model, and the description of the above embodiments is only used to help understand the method and core idea of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (15)

1. A battery pack, comprising:

the battery module comprises a plurality of battery cell groups, wherein the battery cell groups are arranged at intervals along a first direction, the battery cell groups comprise a plurality of battery cells, and the battery cells are arranged at intervals along a second direction;

the reinforcing module comprises a plurality of reinforcing beams;

the liquid cooling module comprises a plurality of liquid cooling plates, the liquid cooling plates and the stiffening beams are alternately arranged along the first direction at intervals, and one electric core group is arranged between each adjacent liquid cooling plate and each stiffening beam.

2. The battery pack according to claim 1, comprising a case including a bottom plate and a plurality of side beams fixedly provided at edges of the bottom plate to enclose a receiving chamber;

the battery module set the reinforcing module set with the liquid cooling module set up in hold the intracavity, reinforcing beam, the both ends of liquid cooling board respectively with boundary beam fixed connection.

3. The battery pack according to claim 2, wherein the reinforcing beam and/or the liquid cooling plate are in contact with the outer peripheral surfaces of the electric cells on both sides of the reinforcing beam and/or the liquid cooling plate, and the reinforcing beam and/or the liquid cooling plate are matched with the outer peripheral surfaces of the electric cells.

4. A battery pack according to claim 3, wherein the cells are cylindrical cells, and the reinforcing beam and/or the liquid cooling plate are corrugated structures to fit the outer peripheral surfaces of the cylindrical cells.

5. The battery pack according to any one of claims 2 to 4, wherein a plurality of first concave portions and a plurality of second concave portions are provided on a side of the side beam adjacent to the reinforcing beam, the plurality of first concave portions and the plurality of second concave portions being alternately arranged at intervals in the first direction;

a first inserting part is arranged on one side, close to the boundary beam, of the liquid cooling plate, and one first inserting part is inserted and arranged corresponding to one first concave part;

and a second inserting part is arranged on one side, close to the side beam, of the stiffening beam, and one second inserting part is inserted and arranged corresponding to one second concave part.

6. The battery pack according to claim 5, wherein the second insertion portion and the second recess portion are fixed by welding.

7. The battery pack according to any one of claims 1 to 4, further comprising a gel unit, wherein the gel unit is sleeved on an outer surface of each of the electric cells.

8. The battery pack according to claim 7, wherein the gel unit comprises a foaming gel, a plurality of openings are formed in the foaming gel, one opening is arranged corresponding to one cell, and the outer side wall of the cell is adhered to the inner wall of the opening.

9. The battery pack according to any one of claims 2 to 4, wherein the case further comprises a support frame disposed between the base plate and the battery module, the support frame being fixedly connected to the reinforcing module and the base plate, respectively;

the support frame is provided with a plurality of mounting grooves, the depth of each mounting groove is smaller than the thickness of the support frame, one mounting groove corresponds to one battery cell, and the battery cells are placed in the mounting grooves.

10. The battery pack of claim 9, wherein a pressure relief cavity is defined between the support frame, the bottom plate, and the side rail;

the support frame is further provided with a plurality of through holes, one through hole corresponds to one installation groove, the aperture of the through hole is smaller than the diameter of the installation groove, the through hole penetrates through the installation groove, and the through hole is communicated with the pressure relief cavity.

11. The battery pack according to claim 9, wherein one of the support frame and the reinforcement beam is provided with a plurality of fixing holes, the other one is provided with a plurality of protrusions, one of the protrusions is arranged corresponding to one of the fixing holes, and the protrusions are clamped in the fixing holes.

12. The battery pack of claim 11, wherein the protrusions are fixed to the fixing holes by welding.

13. The battery pack according to any one of claims 2 to 4, further comprising a battery module collecting and integrating assembly provided at a side of the battery module away from the bottom plate, the battery module collecting and integrating assembly comprising:

the fixing frame is provided with a mounting hole;

and the bus bars are embedded into the mounting holes, are in contact with the battery cells and are used for electrically connecting a plurality of the battery cells.

14. The battery pack of claim 13, wherein the buss bar includes a plurality of buss bar units including a positive electrode connection portion and a negative electrode connection portion, the mounting holes including a positive electrode mounting hole and a negative electrode mounting hole, the positive electrode connection portion being electrically connected to the positive electrode of the cell through the positive electrode mounting hole, the negative electrode connection portion being electrically connected to the negative electrode of the cell through the negative electrode mounting hole, and the connecting arm for connecting adjacent two of the buss bar units.

15. A powered device comprising a battery pack as claimed in any one of claims 1-14.