CN115775951A

CN115775951A - Battery module, battery package and vehicle

Info

Publication number: CN115775951A
Application number: CN202211495132.7A
Authority: CN
Inventors: 王正宏; 袁文静; 张伯都; 童云宇; 黄荣; 王鹏
Original assignee: Bluepark System Branch Of Baic New Energy Motor Co ltd; Beijing Electric Vehicle Co Ltd
Current assignee: Bluepark System Branch Of Baic New Energy Motor Co ltd; Beijing Electric Vehicle Co Ltd
Priority date: 2022-06-20
Filing date: 2022-11-26
Publication date: 2023-03-10
Also published as: CN219180630U; CN219180634U; CN219180631U; CN219180632U; CN219180635U; CN219303796U; CN219180629U; CN219180633U; CN219180628U

Abstract

The application discloses battery module, battery package and vehicle belongs to battery manufacturing technical field. The battery module includes: the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are arranged side by side along the thickness direction; an end plate located at an end of the plurality of cells; the side plates are positioned on the outer side surfaces of the two outermost battery cells; the cushion, the curb plate with the outside the centre gripping has between the lateral surface of electric core the cushion through the setting of a plurality of electric cores, end plate, curb plate and cushion, cooperates the compression performance of cushion, fixes electric core in width direction, and it is unsteady to reduce the displacement of electric core at the battery module, improves the structural reliability of battery module, and has reduced the assembly parts in groups of electric core.

Description

Battery module, battery package and vehicle

Cross Reference to Related Applications

The present application claims priority of the chinese patent application No. 202221547710.2 entitled "cover plate and battery of power battery", filed 6/20/2022 by beijing new energy vehicles gmbh and the blue valley power systems division of beijing new energy vehicles gmbh, the entire contents of which are incorporated herein by reference.

Technical Field

The application belongs to the technical field of battery manufacturing, especially relates to a battery module, battery package and vehicle.

Background

Some battery module can adopt the mode of the traditional module of square-shell battery, there is the module aluminium end plate in the traditional module, the aluminium curb plate, the electricity core side bonds through the structure glue with the aluminium curb plate, end plate and aluminium curb plate weld, thereby make the module become a whole, there is the fixed orifices on the aluminium end plate, it is fixed to be used for the module, this kind of structure mode production technology is complicated, spare part is more, and is with high costs, electric core percentage of uniting is low, in the correlation technique, arrange multi-functional flexible cold plate between electric core big face, its cooling structure is harmonica tubular form, but the inventor research discovery, above-mentioned cooling structure reliability has certain risk, and because the existence of flexible cold plate, the module is arranged length direction and can be floated, rely on the bonding of electric core and battery package top apron completely, structural reliability has the risk.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. For this reason, this application proposes a battery module, battery package and vehicle, through fixing electric core in width direction, improves battery module's structural reliability.

In a first aspect, the present application provides a battery module, comprising:

the battery cell structure comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery modules, wherein the battery cells are arranged side by side along the thickness direction;

an end plate positioned at an end of the plurality of cells;

the side plates are positioned on the outer side surfaces of the two outermost battery cells;

the elastic cushion is clamped between the side plate and the outer side face of the battery cell on the outermost side.

According to the battery module of this application, through the setting of a plurality of electric cores, end plate, curb plate and cushion, the compression performance of cooperation cushion fixes electric core in width direction, reduces the displacement of electric core at the battery module and floats, improves the structural reliability of battery module, and has reduced the assembly parts in groups of electric core.

According to one embodiment of the application, heat insulating mats are clamped between the adjacent battery cells.

According to an embodiment of the present application, the battery cell includes:

a housing;

the pole core is arranged in the shell;

and the two cover plate assemblies are respectively arranged at the two ends of the shell and respectively comprise an explosion-proof valve and a plurality of polar columns.

According to an embodiment of the application, be equipped with a plurality of pressure release holes on the end plate, every on the end plate a plurality of pressure release holes with a plurality of electric cores one-to-one.

In a second aspect, the present application provides a battery pack, comprising:

a mounting frame;

as in any one of the above battery modules, the battery module is mounted in the mounting frame, and the elastic pad is in a compressed state.

According to the battery package of this application, but the module structural style of above-mentioned extrusion income case, the compressible material of cooperation cushion strengthens the longitudinal fixation of battery module in the installation frame, reduces electric core and floats at the displacement of battery module, when having reduced the group's of electric core assembly parts, has promoted the rigidity of whole battery package.

According to an embodiment of the present application, the battery pack further includes:

the bottom guard plate is mounted at the bottom of the mounting frame;

an upper cover mounted on the top of the mounting frame.

The lower cooling plate is positioned between the bottom guard plate and the lower surface of the battery module;

and the upper-layer cooling plate is positioned between the upper cover and the upper surface of the battery module.

According to an embodiment of the application, the inlet and outlet of the lower cooling plate and the inlet and outlet of the upper cooling plate are arranged crosswise.

According to an embodiment of the application, the battery module pass through heat conduction structure glue with lower floor's cooling panel reaches upper cooling panel bonds, and is located the heat conductivity that the heat conductivity structure of import department glued and is less than the heat conductivity that the heat conductivity structure that is located the exit glued.

According to an embodiment of the application, the mounting frame comprises:

the battery module comprises an outer frame, a cross beam and longitudinal beams, wherein a plurality of mounting areas are limited by the outer frame, the cross beam and the longitudinal beams, the battery modules are arranged in the mounting areas, and the side plates are stopped against the cross beam.

According to one embodiment of the application, the cross beam is provided with a first notch at a position crossing the longitudinal beam, and a second notch at a position connected with the outer frame.

the first fireproof layer is arranged between the first notch and the upper cover;

and the second fireproof layer is arranged between the second gap and the upper cover.

In a third aspect, the present application provides a vehicle comprising any of the battery packs described above.

The vehicle provided with the battery pack has high-power bearing capacity and high-rate quick charging performance, and is convenient to start and accelerate; on the other hand, the vehicle has good heat management capability, realizes large-multiplying-power quick charging in a full temperature range, and finally achieves the functional linkage of quick temperature rise in a low-temperature section, large-multiplying-power charging in a normal-temperature section and temperature balance in a high-temperature section, so that the safety performance of the vehicle is improved, and the service life of the vehicle is prolonged.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 2 is a partially enlarged structural schematic view of a battery module according to an embodiment of the present disclosure;

fig. 3 is one of schematic structural diagrams of a battery cell of a battery module provided in an embodiment of the present application;

fig. 4 is a second schematic structural diagram of a battery cell of the battery module provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

fig. 6 is a second schematic structural diagram of a battery pack according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a mounting bracket provided in an embodiment of the present application;

FIG. 8 is a partially enlarged schematic structural view of a mounting bracket according to an embodiment of the present application;

fig. 9 is a second partially enlarged structural schematic view of the mounting bracket according to the embodiment of the present application;

fig. 10 is a third schematic structural diagram of a battery pack according to an embodiment of the present application;

fig. 11 is a schematic diagram illustrating a position of a loading point of a battery pack according to an embodiment of the present disclosure;

fig. 12 is one of schematic mounting structures of a cooling plate of a battery pack according to an embodiment of the present application;

fig. 13 is a schematic structural view of a cooling plate of a battery pack according to an embodiment of the present application;

fig. 14 is a partially enlarged structural schematic view of a cooling plate of a battery pack according to an embodiment of the present application;

fig. 15 is a second schematic view illustrating an installation structure of a cooling plate in a battery pack according to an embodiment of the present application;

fig. 16 is a schematic structural view of a double-layer cooling plate of a battery pack according to an embodiment of the present application;

fig. 17 is a second schematic structural view of a double-layer cooling plate of a battery pack according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a first insertion plate of a battery pack according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a second insertion plate of a battery pack according to an embodiment of the present application.

Reference numerals are as follows:

a battery module 100, a side plate 101, an elastic pad 102, and a heat insulation pad 103;

the battery cell comprises a battery cell 110, a shell 111, a cover plate assembly 112, a positive cover plate assembly 112a and a negative cover plate assembly 112b;

an explosion-proof valve 113, a positive explosion-proof valve 113a, a negative explosion-proof valve 113b, a pole 114, a positive pole 114a, a negative pole 114b;

end plate 120, relief hole 121;

the anti-explosion ventilation valve comprises a mounting bracket 200, an outer frame 210, a boundary beam 211, a front beam 212, a rear beam 213, an anti-explosion ventilation valve 214, a cross beam 220, a first notch 221, a second notch 222, a hanging point 223 and a longitudinal beam 230;

the upper-layer cooling plate 300, the first mounting hole 310, the through hole 320, the upper-layer cooling plate inlet 330 and the upper-layer cooling plate outlet 340;

the lower cooling plate 400, the second mounting hole 410, the runner plate 430, the support plate 440, the lower cooling plate inlet 430, and the lower cooling plate outlet 440;

a sealing adhesive layer 401, a heat-conducting structural adhesive 402 and a threaded connecting piece 403;

bushing 420, relief hole 421;

a first flame retardant layer 501, a second flame retardant layer 502;

a first plugboard 600, a first main water inlet 610, a first water inlet joint 620, a second main water inlet 630, a second water inlet joint 640 and a first flange 650;

a second plugboard 700, a first main water outlet 710, a first water outlet joint 720, a second main water outlet 730, a second water outlet joint 740 and a second flange 750;

a bottom guard plate 800;

and a cover 900.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

Unless otherwise specified, the front-rear direction in the present application is the longitudinal direction of the vehicle, i.e., the X direction; the left and right directions are the transverse direction of the vehicle, namely the Y direction; the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

The present application discloses a battery module 100.

A battery module 100 according to an embodiment of the present application is described below with reference to fig. 1 to 4.

In some embodiments, as shown in fig. 1 to 2, the battery module 100 includes: a plurality of cells 110, an end plate 120, a side plate 101, and an elastic pad 102.

A plurality of battery cells 110 are arranged side by side along the thickness direction.

Electric core 110 can adopt the design of long thinization, and length is L, highly is H, and thickness is T, satisfies: 500mm L620mm, 70mm H130mm, 14mm T25 mm, and the specific structure of the cell 110 is described in detail later.

A plurality of battery cells 110 may be used to store electrical energy and provide power, where a plurality represents 2 or more than 2.

In actual implementation, a plurality of battery cells 110 are stacked in the thickness direction and assembled into the battery module 100, and the plurality of battery cells 110 convert the chemical energy inside into electric energy and output the electric energy, so as to provide power for the structure where the battery module 100 is located.

End plates 120 are located at the ends of the plurality of cells 110.

End plate 120 may be used for thermal protection, as shown in fig. 1, end plate 120 may be disposed at one end of a plurality of battery cells 110, or end plate 120 may be disposed at both ends of a plurality of battery cells 110, for example, in some embodiments, as shown in fig. 1, end plate 120 is disposed at both ends of a plurality of battery cells 110.

End panel 120 may be made of a fire resistant material, a heat insulating material, or other materials, such as, in some embodiments, a fire resistant material for end panel 120. The fireproof material includes but is not limited to ceramic silicon rubber, mica or other materials.

The fireproof material of the end plate 120 can prevent thermal spreading, thereby reducing the damage caused by thermal runaway.

The side plates 101 are located on outer side surfaces of the two outermost battery cells 110.

Side plate 101 can be used to fix a plurality of electric cores 110 and prevent fires, and side plate 101 can be the fire prevention plastic material, and the fire prevention plastic material includes but not limited to phenolic resin, foam or aerogel etc..

In actual execution, the side plates 101 of two outer side surfaces of the plurality of battery cells 110 are matched with the end plates 120 of two end portions of the plurality of battery cells 110 to jointly enclose an internal area of the battery module 100, the internal area defines the installation position of the plurality of battery cells 110, and when the battery cells 110 are out of thermal runaway, the side plates 101 assist the end plates 120 to protect the battery modules 100 at other adjacent positions.

An elastic pad 102 is clamped between the side plate 101 and the outer side surface of the outermost battery cell 110, and the heat insulation pad 103 and the elastic pad 102 are made of fireproof materials.

The cushion 102 can be used for cushioning, fixing, and preventing fire, and the cushion 102 can be made of rubber, foam, aerogel, etc., for example, in some embodiments, the cushion 102 is made of aerogel.

When the battery module 100 is not assembled into the frame, the elastic pad 102 is in a free state; the elastic pad 102 is in a compressed state when the battery module 100 is assembled into the frame, and the compressed elastic pad 102 fixes the battery module 100 in the frame after being assembled into the frame.

In the actual execution, when battery module 100 received the striking or when jolting, elastic pad 102 cushions huge impact to lower level through its compressible material of kick-backing, reduces the injury that the effect of striking caused a plurality of batteries 110 in to battery module 100, simultaneously, when inside batteries 110 takes place the thermal runaway, and the fire prevention material of elastic pad 102 prevents that high temperature air current from continuing to spread to battery module 100 outside.

The battery module 100 that this application embodiment provided, through a plurality of electric cores 110, end plate 120, curb plate 101 and cushion 102's setting, cooperation cushion 102's compression performance fixes electric core 110 in the width direction, reduces electric core 110 and floats at battery module 100's displacement, improves battery module 100's structural reliability, and has reduced electric core 110's assembly parts in groups.

In some embodiments, as shown in fig. 1-2, a thermal insulation pad 103 is sandwiched between adjacent battery cells 110.

The heat insulation pad 103 can be used for fire protection, heat insulation and buffering, and the material of the heat insulation pad 103 can be aerogel, fire-proof silicone rubber or other materials, for example, in some embodiments, the material of the heat insulation pad 103 is fire-proof silicone rubber.

The connection manner between the thermal insulation pad 103 and the electrical core 110 may include, but is not limited to, glue bonding, snap-fit connection, or bolt connection, for example, in some embodiments, the thermal insulation pad 103 and the electrical core 110 are connected by glue bonding, and the adhesive may include, but is not limited to, CMC (sodium carboxymethyl cellulose), SBR (styrene butadiene rubber), or PVDF (polyvinylidene fluoride), and the like.

In actual implementation, two faces of the heat insulating pad 103 are coated with an adhesive, the heat insulating pad 103 coated with the adhesive is placed between two adjacent battery cells 110 at intervals, and when one of the battery cells 110 in the battery module 100 is out of thermal control, the heat insulating pad 103 can effectively block heat from being transferred to the adjacent battery cells 110, so that the heat is prevented from being diffused in the whole battery module 100 in a large range.

Due to the arrangement of the heat insulation pad 103, the two adjacent battery cells 110 are arranged at intervals, so that on one hand, a domino effect generated by thermal runaway of the battery cells 110 is effectively avoided; on the other hand, the thermal insulation pad 103 also has good compression performance, and can also be used as a buffer material to offset expansion and contraction changes of the battery cell 110 in the charging and discharging processes.

In some embodiments, as shown in fig. 3 to 4, the battery cell 110 includes: a housing 111, a pole piece and two cover plate assemblies 112.

As shown in fig. 3-4, the housing 111 may be a thin-walled shell, such as the thickness of the housing 111 may be 0.3mm to 0.8mm, and in some embodiments, the thickness of the housing 111 may be 0.5mm or 0.7mm. The case 111 may be made of an aluminum alloy plate or a steel plate, and the case 111 may be formed in a long flat shape.

For example, in an actual implementation, a whole piece of aluminum skin may be rolled into a rectangular tubular shape, and welded on two overlapped side edges to form a hollow square tube with two open ends and a closed periphery, wherein the welding may be bending welding or high-frequency welding, and after the welding is completed, the long and thin shell 111 may be obtained through two or other times of stretching. The aluminum alloy shell is light in weight, and once the battery explodes in application, the aluminum shell can reduce the explosion impact force.

Or the shell 111 may be formed by welding two same aluminum sheets, welding and connecting one side of the two aluminum sheets, and welding and connecting the other side of the two aluminum sheets to form a hollow square tube with two open ends and a closed periphery, and the long and thin shell 111 may be obtained by stretching twice or other times. The case 111 manufactured by taking this example has welding seams on both sides, and the case 111 manufactured by using a single aluminum sheet has welding seams only on one side to be welded.

The pole core is arranged in the shell 111, the pole core can comprise a positive plate, a negative plate, a diaphragm and electrolyte, the pole core can be formed by lamination or winding, and the pole core can comprise one or more minimum pole core units.

An example in which the pole core is formed by lamination is described below.

And placing a layer of negative plate on the diaphragm, placing a layer of diaphragm on the negative plate, placing a positive plate on the diaphragm on the negative plate, and finally placing a layer of diaphragm on the positive plate to prepare the minimum pole core unit. It should be noted that a minimum pole core unit cannot constitute a complete pole core, and the minimum pole core unit needs to be stacked layer by layer in the thickness direction to manufacture the complete pole core.

An example in which the pole piece is formed by winding is described below.

The minimum pole core unit is rolled into a roll core shape which is wrapped layer by layer through the rotation of a rolling needle, and the roll core can be cylindrical or elliptic cylindrical, and the rolling needle can be prismatic, elliptic or circular.

The positive current collector is led out from one end of the core and connected to the positive post 114a by welding, and the negative current collector is led out from the other end of the core and connected to the negative post 114b by welding.

In actual implementation, the current collector can be welded into a metal plate in a spot welding manner, the pole 114 serves as an inner-layer welding part, the pole piece current collector is located on two sides of the pole 114, and the two sides of the pole 114 can be respectively welded with the metal plate in an electromagnetic pulse welding manner. It will be appreciated that current is directed into the poles 114 through the current collector and the discharge is output via the plurality of poles 114 extending out of the housing 111.

As shown in fig. 3 to 4, two cover plate assemblies 112 are respectively installed at the outer ends, and each of the two cover plate assemblies 112 includes an explosion-proof valve 113 and a plurality of poles 114.

The cover plate assembly 112 and the housing 111 may be connected by laser welding, and the two cover plate assemblies 112 are a positive cover plate assembly 112a and a negative cover plate assembly 112b, respectively.

As shown in fig. 3-4, positive cover plate assembly 112a may include a positive post 114a and a positive explosion-proof valve 113a.

As shown in fig. 3-4, negative cover plate assembly 112b may include negative post 114b and negative explosion-proof valve 113b.

The positive electrode column 114a may be a conductive material, or the positive electrode column 114a may also be a multi-material composite material, for example, the positive electrode column 114a may adopt a ternary positive electrode material, the ternary positive electrode material may include three materials of nickel, cobalt, and manganese, or the ternary positive electrode material may also include three materials of nickel, cobalt, and aluminum, and the positive electrode column 114a may also be provided with a protective sheet.

The positive posts 114a can be provided in a plurality of numbers, wherein the number of the positive posts is two or more than two, the positive posts 114a can be made into a round shape, a square shape or other shapes, one end of each positive post 114a can be integrally welded with a pole core inside the battery, and the other end of each positive post 114a extends out of the shell to be connected with an external circuit, so that the charging and discharging effects are achieved.

The negative electrode 114b may be made of a conductive material, for example, the negative electrode 114b may be made of aluminum, copper-aluminum friction welding or other materials, and the negative electrode 114b may also be provided with a protective sheet.

The negative electrode posts 114b may be provided in a plurality of numbers, where the number of the negative electrode posts 114b is two or more, the negative electrode posts 114b may be made into a circular shape, a square shape or other shapes, one end of the negative electrode posts 114b may be integrally welded to a pole core inside the battery, and the other end of the negative electrode posts extends out of the case to be connected to an external circuit, so as to achieve the charging and discharging function.

In the related art, only one pole 114 is provided, which results in a small battery capacity and a corresponding decrease in the allowable current intensity.

It will be appreciated that the above technique reduces the current density and affects the energy density, particularly for battery powered devices, which can be done with less work when fully charged and the capacity of the battery pack is not as desired for the same mass. The battery cell 110 of the embodiment of the present application is provided with the multiple poles 114, so that the allowable current is stronger, the energy density is larger, and meanwhile, the capacity of the battery pack with the same weight is larger.

The positive explosion-proof valve 113a may be disposed at the second end of the positive cover plate assembly 112a, the positive explosion-proof valve 113a may be made of an aluminum alloy material, and the positive explosion-proof valve 113a may be connected to the positive cover plate in an integrally formed manner. The positive explosion-proof valve 113a may have a kidney shape, a circular shape, an oval shape, or other shapes, and a protective sheet may cover the upper side of the positive explosion-proof valve 113a.

In practical implementation, when the internal pressure of the battery pack case is lower than the burst value set by the positive explosion-proof valve 113a, hot air flows from the side with higher pressure to the side with lower pressure, and the air is discharged outwards through the positive explosion-proof valve 113a, and when the internal pressure of the case is lower than the external pressure, the air enters the inner cavity from the positive explosion-proof valve 113a, so that the balance between the internal pressure and the external pressure is realized.

The negative explosion-proof valve 113b may be disposed at the second end of the negative cover plate assembly 112b, the negative explosion-proof valve 113b may be made of an aluminum alloy material, and the negative explosion-proof valve 113b may be connected to the negative cover plate in an integrally formed manner. The negative explosion-proof valve 113b may have a kidney shape, a circular shape, an oval shape, or other shapes, and a protective sheet may cover the upper side of the negative explosion-proof valve 113b.

In practical implementation, when the internal pressure of the battery pack case is lower than the set explosion value of the negative explosion-proof valve 113b, hot air flows from the side with higher pressure to the side with lower pressure, and the air is discharged outwards through the negative explosion-proof valve 113b, and when the internal pressure of the case is lower than the external pressure, the air enters the inner cavity from the negative explosion-proof valve 113b, so that the balance between the internal pressure and the external pressure is realized.

It should be noted that, the explosion-proof valve 113 needs to be provided with a protection member made of plastic or other materials inside the battery cell 110, and occupies a certain internal space of the battery cell 110. This electric core 110 draws forth utmost point post 114 in both sides, need set up plastic part and protective cradle etc. under the apron, has occupied certain space, therefore sets up explosion-proof valve 113 on the apron subassembly 112 of both sides, can not waste electric core 110 inner space.

As shown in fig. 6, by providing two explosion-proof valves 113, if thermal runaway occurs in the battery cell 110, hot air can reach a designated place through a shorter pressure relief path, and the embodiment can effectively shorten the path for pressure relief transmission, so that pressure is guided to burst at the position of the explosion-proof valve 113, and safety risk is effectively reduced.

It should be noted that the configuration of the explosion-proof valve 113 may be a mirror-symmetrical configuration or a central-symmetrical configuration, for example, in some embodiments, the configuration of the explosion-proof valve 113 is a mirror-symmetrical configuration. Namely, the positive explosion-proof valve 113a and the negative explosion-proof valve 113b are disposed at the first end of the corresponding cap assembly 112.

The design of mirror symmetry arrangement can make 113 both ends of explosion-proof valve correspond to each other, makes the reasonable flexibility of electric core 110 internal space overall arrangement simultaneously.

According to the battery cell 110 provided by the embodiment of the application, the explosion-proof valves 113 are connected in parallel through the plurality of poles 114 and arranged on two sides, so that the energy density can be improved under the condition of ensuring the current intensity, and the safety of the battery cell 110 can be improved under the condition of not influencing the volume utilization rate.

In some embodiments, as shown in fig. 3 to fig. 4, an electrical core 110 provided in the embodiment of the present application has a length L, a height H, and a thickness T, and satisfies: l is more than or equal to 500mm and less than or equal to 620mm, H is more than or equal to 70mm and less than or equal to 130mm, and T is more than or equal to 14mm and less than or equal to 25mm. For example, in some embodiments, the specific dimensions of the battery cell 110 are: l =580mm, h =80mm, t =20mm. In the embodiment of the present application, the specific sizes of the battery cells 110 are as follows: l =600mm, h =112mm, t =15.5mm.

In actual implementation, the pole core stacked by the plurality of pole core units can output strong current for the requirement of charging, the thinner shell also reduces the volume utilization rate, and even if the battery cell 110 is out of control due to heat, hot air can be discharged from the anti-explosion valves 113 on both sides.

The pole core stacking layer number is increased due to the long thinning design, so that the energy volume density is increased, the allowable current intensity can be increased by combining the structural design of the multi-pole column 114 on the premise of reducing the volume, and the thermal runaway hazard can be reduced by combining the structural design of the two-end explosion-proof valves 113.

In some embodiments, as shown in fig. 1-2, a plurality of pressure relief holes 121 are formed in the end plate 120, and the plurality of pressure relief holes 121 in each end plate 120 correspond to the plurality of explosion-proof valves 113 one by one.

It can be understood that when the battery module 100 is not yet assembled into the frame, the elastic pad 102 is in a free state, and the plurality of pressure relief holes 121 of the end plate 120 are not aligned with the plurality of explosion-proof valves 113, and when the battery module 100 is already assembled into the frame, the elastic pad 102 is in a compressed state, and the plurality of pressure relief holes 121 of the end plate 120 are aligned with the plurality of explosion-proof valves 113.

Wherein, a plurality of the pressure relief holes 121 represents 2 or more than 2, the shape of the pressure relief hole 121 may be a kidney shape, a circle, a square, a triangle or a polygon, etc., and the shape of the pressure relief hole 121 may be similar to the shape of the explosion-proof valve 113, for example, in some embodiments, the shapes of the pressure relief hole 121 and the explosion-proof valve 113 are both kidney shapes.

In actual execution, the position of explosion-proof valve 113 after the installation is fixed a position on end plate 120 in advance, carry out trompil in advance to end plate 120 according to the location mark, then will possess the both ends of the end plate 120 installation of pressure release hole 121 to a plurality of electric core 110, the installation is accomplished the back, the position of the explosion-proof valve 113's at electric core 110 both ends position of pressure release hole 121 on the end plate 120 at both ends is corresponding, take place thermal runaway when electric core 110, when outside injection high temperature high-speed air current, pressure release hole 121 position guidable injection air current direction.

Through the setting of above-mentioned a plurality of pressure release holes 121, cooperate with explosion-proof valve 113 in electric core 110 both ends, dredged explosion-proof valve 113 and led to the outer pressure release passageway of battery module 100 to avoid steam a large amount of inflation to arouse short circuit or explosive danger in battery module 100, and then perfect thermal management system's function.

The application also discloses a battery pack.

A battery pack according to an embodiment of the present application is described below with reference to fig. 5 to 19.

In some embodiments, as shown in fig. 5-6 and 10-11, a battery pack includes: the frame 200 is mounted.

The mounting frame 200 has a plurality of mounting regions for mounting the battery modules 100.

Mounting frame 200 may be used to support a unitary structure, and mounting frame 200 may be made of metal, plastic, or other materials, for example, in some embodiments, mounting frame 200 is made of metal. The metal material may include, but is not limited to, aluminum, nickel, or steel.

As in the battery module 100 as described above, the battery module 100 is mounted in the mounting frame 200 with the elastic pad 102 in a compressed state.

In an actual implementation, before the battery module 100 enters the mounting frame 200 for assembly, the elastic pad 102 is compressed by adjusting the tooling fixture, so that the battery module 100 and the mounting frame 200 form a clearance fit. After the battery module 100 enters the installation frame 200 for assembly, the tool clamp is removed, the compressed elastic pad 102 is released, and at the moment, the battery module 100 and the installation frame 200 form interference fit.

It should be noted that, when the elastic pad 102 is in a free state, the position of the explosion-proof valve 113 on the battery cell 110 and the position of the pressure relief hole 121 on the end plate 120 are not opposite to each other; when the elastic pad 102 is not released, the position of the explosion-proof valve 113 on the battery cell 110 and the position of the pressure relief hole 121 on the end plate 120 are not arranged opposite to each other; after the elastic pad 102 is released, the position of the explosion-proof valve 113 on the battery cell 110 is just opposite to the position of the pressure relief hole 121 on the end plate 120.

Above-mentioned but module structural style of extrusion income case, the compressible material of cooperation elastic cushion 102 strengthens the vertical fixed of battery module 100 in installation frame 200, reduces electric core 110 and floats at battery module 100's displacement, when having reduced electric core 110's the assembly parts in groups, has promoted the rigidity of whole battery package.

In some embodiments, as shown in fig. 5-6, the battery pack further comprises: bottom guard plate 800, upper cover 900, lower cooling plate 400, and upper cooling plate 300.

The bottom guard 800 is mounted to the bottom of the mounting frame 200.

The bottom guard plate 800 may be used to protect the bottom surface of the battery pack, and in actual implementation, the bottom guard plate 800 protects the bottom of the battery pack from being damaged when the battery pack rubs or impacts against other elements.

The upper cover 900 is mounted on the top of the mounting frame 200.

The upper cover 900 may be used to protect the upper top surface of the battery pack, and in an actual implementation, when the battery pack rubs or collides with other elements, the upper cover 900 protects the top of the battery pack from being damaged; meanwhile, when the hot air in the battery module 100 is discharged to the outside, the upper cover 900 prevents the hot air from continuously moving upward to wash out other components connected to the battery pack.

The lower cooling plate 400 is positioned between the bottom sheathing plate 800 and the lower surface of the battery module 100, and the lower cooling plate 400 is fixedly coupled to the outer frame 210.

The lower cooling plate 400 may be used to maintain temperature equilibrium, and the cooling manner of the lower cooling plate 400 may be air cooling, liquid cooling, or heat pipe, for example, as shown in fig. 5-6 and fig. 16-17, the cooling manner of the lower cooling plate 400 is liquid cooling, which will be described below by taking the cooling manner of the lower cooling plate 400 as an example.

As shown in fig. 16-17, the lower cooling plate 400 may include a lower cooling plate inlet 430 and a lower cooling plate outlet 440.

The upper-layer cooling plate 300 is located between the upper cover 900 and the upper surface of the battery module 100, and the upper-layer cooling plate 300 is fixedly connected to the cross member 220.

The upper cooling plate 300 may be used to maintain temperature balance, and the cooling manner of the upper cooling plate 300 may be air cooling, liquid cooling, or heat pipe, for example, as shown in fig. 5-6 and fig. 16-17, the cooling manner of the upper cooling plate 300 is liquid cooling, which is described below by taking the cooling manner of the upper cooling plate 300 as liquid cooling.

As shown in fig. 16-17, the upper cooling plate 300 may include an upper cooling plate inlet 330 and an upper cooling plate outlet 340.

In practical implementation, when the battery pack is in operation, a large amount of excessive heat is generated, the heat is mutually transferred by means of surface contact with the upper cooling plate 300 and the lower cooling plate 400, the cooling medium is injected into the upper cooling plate 300 from the upper cooling plate inlet 330, meanwhile, the cooling medium is injected into the lower cooling system from the lower cooling plate inlet 430, the injected cooling medium circulates in the upper cooling plate 300 and the lower cooling plate 400, the upper cooling plate 300 and the lower cooling plate 400 transfer high heat by means of liquid flow by utilizing the characteristic of large heat exchange coefficient of liquid flow, and the high heat is taken away by the cooling medium passing through the upper cooling plate 300 and the lower cooling plate 400 and is finally discharged from the upper cooling plate outlet 340 and the lower cooling plate outlet 440.

Through the arrangement of the bottom guard plate 800, the upper cover 900, the lower cooling plate 400 and the upper cooling plate 300, on one hand, the strength and rigidity of the structure of the battery pack can be improved; on the other hand, the double-layer cooling plate can improve the thermal protection capability of the battery pack and optimize the thermal management performance of the battery system.

In some embodiments, as shown in fig. 16-17, the inlet and outlet of the lower cooling plate 400 are arranged across the inlet and outlet of the upper cooling plate 300.

As shown in fig. 16-17, the upper cooling plate inlet 330 may be disposed on a first side (left side in fig. 16-17) of the upper cooling plate 300; the upper cooling plate outlet 340 may be disposed on a second side (right-middle-right in fig. 16-17) of the upper cooling plate 300.

As shown in fig. 16-17, the lower cooling plate inlet 430 may be disposed on a second side (right side in fig. 16-17) of the lower cooling plate 400; the lower cooling plate outlet 440 may be disposed on a first side (left side in fig. 16-17) of the lower cooling plate 400.

In actual implementation, the cooling medium flows in from the upper cooling plate inlet 330, and flows out from the upper cooling plate outlet 340 after absorbing high heat, and the temperature of the cooling medium at the upper cooling plate inlet 330 on the first side is lower than that at the upper cooling plate outlet 340 on the second side; the cooling medium flows in from the lower cooling plate inlet 430, absorbs high heat, and then flows out from the lower cooling plate outlet 440, and the temperature of the cooling medium at the lower cooling plate outlet 440 of the first side is higher than that at the lower cooling plate inlet 430 of the second side.

Like this, through the setting of above-mentioned double-deck alternately importing and exporting, realized the equilibrium of the temperature of the first side of battery package and second side to the inside difference in temperature of battery package has been dwindled, and then the security performance of battery package has been promoted.

In some embodiments, as shown in fig. 12, the thermal conductivity of the thermal conductive structure adhesive 402 between the battery module 100 and the first side of the upper cooling plate 300 is less than the thermal conductivity of the thermal conductive structure adhesive 402 between the battery module 100 and the second side of the upper cooling plate 300; the thermal conductivity coefficient of the thermal conductive structure adhesive 402 between the battery module 100 and the second side of the lower cooling plate 400 is less than the thermal conductivity coefficient of the thermal conductive structure adhesive 402 between the battery module 100 and the first side of the lower cooling plate 400.

The structural adhesive 402 at the inlet may be a low thermal conductivity thermal adhesive, which may include, but is not limited to, a thermal sealant, a thermal gasket, or a thermal potting adhesive, for example, in some embodiments, the structural adhesive 402 at the inlet is a thermal gasket.

The structural adhesive 402 at the outlet may be a high thermal conductivity thermal adhesive, which may be a thermal conductive gel, or a high thermal conductivity thermal adhesive, which may be a thermal conductive silicone grease, for example, in some embodiments, the structural adhesive 402 at the outlet is a thermal conductive gel.

In practical implementation, the temperature of a cooling area close to an inlet is low, and the low-thermal-conductivity heat-conducting glue at the inlet ensures that the temperature of the area is not too low, so that the cooling medium at the inlet is prevented from being frozen into a solid state from a liquid state when the temperature is too low, and a channel is prevented from being blocked; the temperature of a cooling area close to the outlet is higher, and the high-heat-conductivity-coefficient heat-conducting glue positioned at the outlet ensures that the temperature of the area is not too high, so that the liquid cooling device is prevented from being damaged by the cooling medium at the outlet when the temperature is too high, and the leakage of the battery pack is avoided.

Through the design of the heat-conducting glue with different heat conductivities of the inlet and the outlet, the whole temperature equalization control of the system is realized by matching with the arrangement of the double-layer inlet and the double-layer outlet in a crossing manner, and the heat management performance is optimized, so that the safety of the whole package is improved, and the service life of a battery system is prolonged.

In some embodiments, as shown in fig. 7, the mounting frame 200 includes: the outer frame 210, the cross members 220, and the longitudinal members 230 define a plurality of mounting regions in which the battery modules 100 are arranged, and the side plates 101 abut against the cross members 220. The specific structure of the mounting frame 200 will be described in detail in the following embodiments.

In some embodiments, as shown in fig. 7-9, the outer frame 210 includes side beams 211, front beams 212, and rear beams 213, the cross beam 220 is connected between the side beams 211, the longitudinal beam 230 is connected between the front beam 212 and the rear beam 213, and the gap includes: a first notch 221 and a second notch 222.

The first notch 221 is located at a position where the cross beam 220 crosses the longitudinal beam 230.

The first gap 221 may be used for conducting the airflow, as shown in fig. 8, the first gap 221 may be disposed in the middle of the beam 220 or other portions, for example, in some embodiments, the first gap 221 is disposed in the middle of the beam 220.

The number of first notches 221 can be 1 or more, wherein a plurality means 2 or more, for example, in some embodiments, as shown in fig. 7, the number of first notches 221 is 4, wherein only one cross beam 220 closest to the front beam 212 of the mounting frame 200 is not provided with first notches 221.

The second notch 222 is located where the cross beam 220 is connected to the edge beam 211.

The second gap 222 can be used to conduct the airflow, as shown in fig. 9, the second gap 222 can be disposed at the end of the beam 220 or other parts, for example, in some embodiments, the first gap 221 is disposed at both ends of the beam 220.

The number of the second notches 222 may be 1 or more, wherein a plurality means 2 or more, for example, in some embodiments, as shown in fig. 7, the number of the second notches 222 is 10.

In a practical implementation, as shown in fig. 7, the plurality of first notches 221 may constitute a central exhaust channel, which mainly flows through a central region of the mounting frame 200; the second plurality of notches 222 may constitute side exhaust channels, the central exhaust channel flowing primarily through the side wall region of the mounting frame 200.

When the airflow is led out from the end of the battery cell 110 away from the edge beam 211 of the mounting frame 200, the airflow enters the middle area between the rear beam 213 and the cross beam 220 of the mounting frame 200 through the first notch 221, and finally is discharged through the explosion-proof vent valve 214 on the rear beam 213 of the mounting frame 200.

When gas is led out from one end of the battery cell 110 close to the edge beam 211 of the mounting frame 200, the gas enters the middle area between the rear beam 213 and the cross beam 220 of the mounting frame 200 through the second notch 222, and finally is discharged through the explosion-proof vent valve 214 on the rear beam 213 of the mounting frame 200.

The arrangement of the first notch 221 and the second notch 222 forms a smooth whole-pack exhaust channel by designing a flow guiding notch at the position where the airflow flows through the cross beam 220 of the installation frame 200, so that the hot airflow rapidly reaches the position of the explosion-proof vent valve 214 along the first notch 221 and the second notch 222 and is rapidly discharged outwards, thereby avoiding the disordered flow of the airflow, causing the insulation failure of a high-voltage connecting part at the position where the airflow flows through, generating a high-voltage arc discharge phenomenon, and directly triggering the short circuit of the battery cell 110 or the battery module 100 and generating thermal runaway.

In some embodiments, as shown in fig. 10, the battery pack further includes: a first flame resistant layer 501 and a second flame resistant layer 502.

The first fireproof layer 501 is disposed between the first notch 221 and the upper cover 900.

The first fireproof layer 501 is used for protecting the upper cover 900 of the mounting frame 200, as shown in fig. 10, the first fireproof layer 501 may be disposed in the middle of the mounting frame 200, and the number of the first fireproof layer 501 may be 1 or more, where a plurality means 2 or more, for example, in some embodiments, as shown in fig. 10, the number of the first fireproof layer 501 is 1.

The material of the first flame-retardant layer 501 may be a flame-retardant coating, mica, or a flame-retardant silicone rubber, for example, in some embodiments, the material of the first flame-retardant layer 501 is a flame-retardant silicone rubber.

The second fireproof layer 502 is disposed between the second notch 222 and the top cover 900.

The second fireproof layer 502 is used for protecting the upper cover 900 of the mounting frame 200, as shown in fig. 10, the second fireproof layer 502 may be disposed on the side of the mounting frame 200, and the number of the second fireproof layer 502 may be 1 or more, where more than one means 2 or more than 2, for example, in some embodiments, as shown in fig. 10, the number of the second fireproof layer 502 is 2.

The material of the second flame-retardant layer 502 may be a flame-retardant coating, mica, or a flame-retardant silicone rubber, for example, in some embodiments, the material of the second flame-retardant layer 502 is a flame-retardant silicone rubber.

In the actual execution, in the weak area of whole package exhaust passage, especially upper cover 900 part near first breach 221 and second breach 222, receive the impact of high temperature high velocity air flow easily, lead to upper cover 900 to be burnt through, sealing failure causes outside fresh air to get into, causes the battery package risk of catching fire, set up first flame retardant coating 501 and second flame retardant coating 502 after, first flame retardant coating 501 protects the middle part of upper cover 900 can not be burnt through by high temperature high velocity air flow, second flame retardant coating 502 protects two sides of upper cover 900 can not be burnt through by high temperature high velocity air flow.

The setting of first flame retardant coating 501 and second flame retardant coating 502 like this, the heat protective capacities of the middle part of guarantee upper cover 900 and lateral part to promote the heat protective capacity of whole battery package, and then promote the security performance of whole battery package.

The application also discloses a mounting frame 200 for a battery pack.

A mounting frame 200 of a battery pack according to an embodiment of the present application is described below with reference to fig. 7 to 10.

In some embodiments, as shown in fig. 7, the mounting frame 200 of the battery pack includes: outer frame 210, cross members 220, and longitudinal members 230.

The outer frame 210 is provided with a through hole for installing the explosion-proof air-permeable valve 214.

The number of through holes may be one or more, wherein a plurality means 2 or more, for example, in some embodiments, as shown in fig. 10, 2 through holes are provided on the outer frame 210.

The stringers 230 are attached to the outer frame 210.

Both ends of the longitudinal beam 230 may be connected to both ends of the outer frame 210 in the X direction, respectively.

The attachment of the stringers 230 to the outer frame 210 may include, but is not limited to, welding, bolting, snapping, riveting, etc., for example, in some embodiments, the stringers 230 are attached to the outer frame 210 by welding.

The number of stringers 230 may be 1 or more, where a plurality refers to 2 or more, for example, in some embodiments, as shown in fig. 7, the number of stringers 230 is 1.

The cross beams 220 are connected with the outer frame 210 and arranged to cross the longitudinal beams 230, the outer frame 210, the cross beams 220 and the longitudinal beams 230 define a plurality of mounting areas for mounting the battery modules 100, and the cross beams 220 are provided with notches for communicating the mounting areas with the explosion-proof vent valves 214.

Both ends of the cross member 220 may be connected to both sides of the outer frame 210 in the Y direction, respectively.

The connection of the cross member 220 to the outer frame 210 includes, but is not limited to, welding, bolting, snapping, riveting, etc., for example, in some embodiments, the cross member 220 is connected to the outer frame 210 by welding.

The number of the beams 220 may be 1 or more, wherein a plurality means 2 or more, for example, in some embodiments, as shown in fig. 7, the number of the beams 220 is 5.

In a practical implementation, the cross beams 220 and the longitudinal beams 230 divide the inside of the mounting frame 200 into a plurality of independent cavities, each of which is provided with a battery module 100, wherein the plurality means 2 or more than 2.

For example, in some embodiments, as shown in fig. 7, the number of the cross beams 220 is 5, the number of the longitudinal beams 230 is 1, 8 independent cavities are formed inside the mounting frame 200, and 8 battery modules 100 are arranged.

The installation frame 200 that this application embodiment provided is through above-mentioned outer frame 210, crossbeam 220 and longeron 230's setting, cooperation water conservancy diversion breach and explosion-proof breather valve 214's design, form unblocked whole package exhaust passage, make electric core 110 take place the thermal runaway back, its high-temperature high-speed air current that erupts reaches explosion-proof breather valve 214 position along the water conservancy diversion passageway rapidly, outwards discharge rapidly, thereby avoid spouting the quick pile up and the unordered flow of air current, lead to the air current to flow through position high-pressure connecting part insulation failure, produce the high pressure and draw the arc phenomenon, directly cause electric core 110 or battery module 100 short circuit and generate heat out of control.

In some embodiments, as shown in fig. 7-9, the outer frame 210 includes side beams 211, front beams 212, and rear beams 213, the cross beams 220 are connected between the side beams 211, the longitudinal beams 230 are connected between the front beams 212 and the rear beams 213, and the gap includes: a first notch 221 and a second notch 222.

The specific structure of the first notch 221 and the second notch 222 can refer to the specific description of the above embodiments.

In some embodiments, as shown in fig. 7, the upper surface of the cross member 220 is higher than the upper surface of the longitudinal member 230, and the notch is located on the upper surface of the cross member 220.

It will be appreciated that, as shown in fig. 7, the height of the cross beam 220 in the vertical direction is higher than that of the longitudinal beam 230, and the upper surface of the cross beam 220 protrudes from the mounting frame 200, in other words, the airflow guided out by the first notch 221 and the second notch 222 can be diffused and flow over the entire large surface of the mounting frame 200.

Meanwhile, as shown in fig. 7, the first notch 221 and the second notch 222 may be both disposed above the mounting frame 200, and the bottom portions of the first notch 221 and the second notch 222 may be both higher than the upper surface of the longitudinal beam 230.

The height relationship between the cross beam 220 and the longitudinal beam 230 is set, and the positions of the first notch 221 and the second notch 222 are matched, so that the area of airflow conduction is increased, the airflow dredging rate is increased, and the thermal management performance of the battery pack is optimized.

In some embodiments, as shown in fig. 7, the outer frame 210 includes side beams 211, front beams 212, and rear beams 213, with cross beams 220 connected between the side beams 211, and longitudinal beams 230 connected between the front beams 212 and the rear beams 213.

As shown in fig. 7, the front beam 212 and the rear beam 213 may be beams at two ends of the outer frame 210 in the X direction, and the shape of the front beam 212 may be a straight line shape, a trapezoidal line shape with two bent ends, or a zigzag line shape with a bent middle, for example, in some embodiments, the shape of the front beam 212 is a trapezoidal line shape with two bent ends; the shape of the back beam 213 may be a straight line, a trapezoid with two bent ends, or a zigzag with a bent middle, for example, in some embodiments, the shape of the back beam 213 is a straight line, one end of the longitudinal beam 230 may be connected to the front beam 212, and the other end of the longitudinal beam 230 may be connected to the back beam 213.

The edge beams 211 may be beams on both sides of the outer frame 210 in the Y direction, and the shape of the edge beams 211 may be a straight line shape, a trapezoidal line shape with both ends bent, or a zigzag line shape with the middle bent, for example, in some embodiments, the edge beams 211 may be a straight line shape, one end of the cross beam 220 may be connected to the edge beam 211 on one side of the outer frame 210, and the other end of the cross beam 220 may be connected to the other end of the outer frame 210.

The rear beam 213 is provided with a through hole, the cross beam 220 is plural, and the cross beam 220 near the rear beam 213 among the plural cross beams 220 is disposed apart from the rear beam 213 and forms an exhaust passage.

In practical implementation, when the airflow is led out from the end of the battery cell 110 away from the boundary beam 211 of the mounting frame 200, enters the exhaust channel through the first notch 221, and finally is exhausted through the explosion-proof vent valve 214; when the gas is led out from the end of the battery cell 110 close to the boundary beam 211 of the mounting frame 200, the gas enters the exhaust channel through the second notch 222, and finally is exhausted through the explosion-proof ventilation valve 214.

Thus, through the spatial position design of the outer frame 210, the cross beam 220 and the longitudinal beam 230, a complete and unobstructed exhaust path with a gap and an exhaust channel matched with each other is formed, so that the phenomenon that the jet air flow flows disorderly, the high-voltage connecting part at the position where the air flow flows is failed to be insulated, high-voltage arc discharge occurs, and short circuit of the battery module 100 is directly caused and thermal runaway occurs is avoided.

In some embodiments, the distance between the cross beam 220 near the back beam 213 and the back beam 213 is C, which satisfies: c is more than or equal to 20mm and less than or equal to 60mm.

For example, in some embodiments, the distance C between the cross beam 220 and the back beam 213 near the back beam 213 is specifically 40mm.

Through the distance setting of the crossbeam 220 that is close to the back beam 213 and the back beam 213, when having guaranteed that the installation frame 200 volume can not too big influence volume utilization, increased exhaust passage's area to improve exhaust efficiency, and then promoted the ability of battery package thermal protection.

In some embodiments, as shown in fig. 7, the plurality of cross members 220 are provided, and one of the plurality of cross members 220 and the outer frame 210 are provided with mounting points 223 for attaching to a vehicle body.

The mounting points 223 on the outer frame 210 may be one or more, where a plurality represents 2 or more than 2, for example, in some embodiments, the outer frame 210 is arranged with 14 mounting points 223.

The specific connection of the cross member 220 and the vehicle body will be described in detail in the following embodiments.

Through the arrangement of the plurality of mounting points 223, the battery pack is fixedly connected with the automobile body, so that the whole battery pack participates in the strength of the automobile body, and the whole rigidity and strength of the automobile body are improved.

The application also discloses another battery pack.

A battery pack according to an embodiment of the present application is described below with reference to fig. 1 to 11.

In some embodiments, as shown in fig. 5-6 and 10-11, the battery pack includes: mounting frame 200, explosion-proof vent valve 214 and battery module 100.

The mounting frame 200 refers to any of the mounting frames 200 in the above embodiments.

The explosion-proof vent valve 214 is installed at the through hole.

The number of the vent valves 214 is one or more, wherein a plurality represents 2 or more than 2, for example, in some embodiments, 2 through holes are provided on the outer frame 210, and 2 vent valves 214 are also provided correspondingly.

In practical implementation, the exhaust passage mainly flows through the side wall and the middle area of the mounting frame 200, the high-temperature and high-speed airflow transmitted from the first notch 221 and the second notch 222 flows into the exhaust passage formed by the cross beam 220 and the back beam 213, which are close to the back beam 213, among the plurality of cross beams 220, and the high-temperature and high-speed airflow in the last two areas is exhausted from the battery pack through the explosion-proof vent valve 214 of the back beam 213.

The battery module 100 is mounted to the mounting region, and the detailed structure of the battery module 100 refers to the description of the above-described embodiment.

The battery package that this application embodiment provided is through above-mentioned installation frame 200, explosion-proof ventilation valve 214 and battery module 100's setting, the design of the first breach 221 of cooperation and second breach 222, the complete smooth air flow channel of formation, avoid the air current to pile up fast and unordered flow in the battery package, avoid peripheral battery module 100 temperature shock, cause thermal runaway chain reaction, further aggravate the battery system thermal runaway emergence, thereby improve the ability of battery package thermal protection.

In some embodiments, as shown in fig. 10, the battery pack further includes: a top cover 900, an upper cooling plate 300, and a fire-proof layer.

The upper cover 900 is mounted on the top of the mounting frame 200.

The upper-layer cooling plate 300 is located between the upper cover 900 and the upper surface of the battery module 100.

The specific structure of the upper cover 900 and the upper cooling plate 300 is described with reference to the above embodiments.

The flame retardant layer is disposed between the gap and the upper cover 900, and the flame retardant layer may include: a first flame resistant layer 501 and a second flame resistant layer 502.

The second flame retardant layer 502 is used to protect the cover 900 of the mounting frame 200, as shown in fig. 10, the second flame retardant layer 502 may be disposed on the side of the mounting frame 200, and the number of the second flame retardant layer 502 may be 1 or more, where more than one means 2 or more than 2, for example, in some embodiments, as shown in fig. 10, the number of the second flame retardant layer 502 is 2.

In some embodiments, as shown in fig. 1-2, the battery module 100 includes: the battery comprises a plurality of battery cells 110, a heat insulation pad 103, an end plate 120, a side plate 101 and an elastic pad 102.

The plurality of battery cells 110 are arranged side by side in the thickness direction.

And a heat insulation pad 103 is clamped between the adjacent electric cores 110.

End plates 120 are located at the ends of the plurality of cells 110.

Lateral plate 101 is located the lateral surface of two electric cores 110 in the outermost side, and lateral plate 101 ends installation frame 200.

An elastic pad 102 is clamped between the side plate 101 and the outer side surface of the outermost battery cell 110, the elastic pad 102 is in a compressed state, and the heat insulation pad 103 and the elastic pad 102 are both made of fireproof materials.

The battery module 100 in the battery pack may refer to the descriptions in other embodiments, and the specific structures of the battery cells 110, the heat insulation pads 103, the end plates 120, the side plates 101, the elastic pads 102, and the like in the battery module 100 may refer to the descriptions in other embodiments.

The application also discloses a battery installation box body.

A battery mounting case according to an embodiment of the present application will be described below with reference to fig. 11 to 15.

In some embodiments, as shown in fig. 15, the battery mounting case includes: mounting frame 200, cooling plates, bushing 420 and sealant layer 401.

The specific structure of the mounting frame 200 is described in other embodiments, and is not described herein.

The cooling plate is provided with mounting holes, and the cooling plate may be used to equalize the temperature in the battery pack, and the cooling plate may include an upper cooling plate 300 and a lower cooling plate 400, which will be described in detail below by taking the cooling plate as the lower cooling plate 400.

The mounting holes may be disposed on the outer frame 210 of the mounting frame 200, on the cross beams 220, or on the longitudinal beams 230, etc., for example, in some embodiments, as shown in fig. 15, the mounting holes are disposed on the outer frame 210 of the mounting frame 200.

As shown in fig. 15, the lower cooling plate 400 may be connected to the mounting frame 200 through mounting holes, and the arrangement of the mounting holes may be one or more, wherein a plurality means 2 or more, for example, in some embodiments, 50 mounting holes are provided.

The shape of the mounting hole may be circular, triangular, square, etc., for example, in some embodiments, as shown in fig. 13-14, the shape of the mounting hole is circular.

The bushing 420 is installed in the installation hole and at least partially protrudes from the cooling plate.

The bushing 420 may serve as a connecting member, and as shown in fig. 13-14, the bushing 420 may be connected to the mounting hole by welding, or the bushing 420 may be connected to the mounting hole by welding, for example, in some embodiments, the bushing 420 is connected to the mounting hole by welding.

It should be noted that, no matter what manner is selected, the connection between the bushing 420 and the mounting hole needs to satisfy the sealing effect of the matching surface between the bushing 420 and the mounting hole.

The lower cooling plate 400 is bonded to the mounting frame 200 by a sealant layer 401, and the portion of the bushing 420 protruding from the cooling plate abuts against the mounting frame 200, and the cooling plate is spaced apart from the mounting frame 200.

The sealant layer 401 is used to isolate the cooling plate from the mounting frame 200, the sealant layer 401 may be a sealant with low thermal conductivity, the sealant with low thermal conductivity may include a single-component sealant or a multi-component sealant, the material of the sealant layer 401 includes but is not limited to acrylic acid, polyurethane, etc., for example, in some embodiments, the sealant layer 401 is a two-component sealant, and the material of the sealant layer 401 is a mixture of two-component raw materials of acrylic acid and polyurethane.

The sealant layer 401 also has a certain elastic modulus.

In practical implementation, the mounting holes are connected to the bushings 420, and the bushings 420 are connected to the mounting frame 200, while the lower cooling plate 400 and the mounting frame 200 are separated by the sealant layer 401.

It should be noted that the upper cooling plate 300 is connected to the mounting frame 200 in the same manner as the lower cooling plate 400 is connected to the mounting frame 200, and a slight difference therebetween is that the upper cooling plate 300 is connected to the cross beam 220 of the mounting frame 200, that is, the mounting holes are disposed on the cross beam 220 of the mounting frame 200; the lower cooling plate 400 is connected to the outer frame 210 of the mounting frame 200, i.e., the mounting holes are disposed at the outer frame 210 of the mounting frame 200.

In actual implementation, the sealant layer 401 inhibits heat from being transferred from the battery cell 110 to the cooling plate, and then transferred to the external environment through the contact position between the cooling plate and the bottom protective plate 800; meanwhile, the sealing adhesive layer 401 has good sealing performance and can meet the dustproof and waterproof requirements of the battery pack; in addition, the sealing glue layer 401 has certain structural strength, and is connected with the liquid cooling plate and the lower shell frame to enhance the structural strength of the whole package.

In the related art, the cooling plate is directly connected with the mounting frame 200 in a large-area contact manner, and a sealant layer 401 with a thickness of 0.2mm to 0.5mm is arranged at the contact position of the cooling plate and the mounting frame 200. Under low temperature environment, the inside heat of battery package transmits the cooling plate earlier, and the direct external environment that transmits the heat with bottom backplate 800 and upper cover 900's connection contact position of rethread cooling plate, above-mentioned technique is when battery package reduce cost, and thermal insulation performance also has the reduction of certain degree.

According to the battery installation box provided by the embodiment of the application, the installation bushing 420 is additionally arranged on the cooling plate, so that the direct contact area between the cooling plate and the installation frame 200 is reduced, and the heat conduction area is reduced; fill special sealant 401 between cooling plate and installation frame 200, can restrain the heat-conduction between cooling plate and the installation frame 200 to promote the thermal insulation performance of battery package under low temperature environment, guarantee the battery package at the temperature operation that suits more, reduce extra energy loss and latency because of the low temperature heating causes, improve whole car power performance, promote driver and crew's experience comfort level.

In some embodiments, as shown in fig. 15, bushing 420 includes a first section having a smaller outer diameter than a second section, the first section being inserted into the mounting hole, the second section abutting the cooling plate near the end of the first section, and the second section abutting mounting frame 200 away from the end of the first section.

The shape of the first section of the bushing 420 may be circular, triangular, square, etc., for example, in some embodiments, as shown in fig. 14, the first section of the bushing 420 is frustoconical; the shape of the second section of the bushing 420 may be circular, triangular, square, etc., for example, in some embodiments, the second section of the bushing 420 is also frustoconical.

The first and second sections of bushing 420 may be integrally formed, or the first and second sections of bushing 420 may be joined by welding, for example, in some embodiments, the first and second sections of bushing 420 are integrally formed.

It will be appreciated that as shown in FIG. 15, the first and second sections of the liner 420 may form an inverted stepped platform, i.e., the first section of the liner 420 is embedded within the lower cooling plate 400 and the second section of the liner 420 is disposed on the surface of the lower cooling plate 400.

In a practical implementation, the lower cooling plate 400 is stopped against the outer frame 210 of the mounting frame 200 by the second section of the bushing 420, thereby achieving a connection with the mounting frame 200.

Through the arrangement of the first and second sections of the bushing 420, in the first aspect, the first section of the bushing 420 is embedded in the lower cooling plate 400, so that the structural strength of the joint is improved, and the joint between the lower cooling plate 400 and the mounting frame 200 is tighter; in a second aspect, second section of bushing 420 separates lower cooling plate 400 from mounting frame 200, reducing contact heat exchange between lower cooling plate 400 and mounting frame 200.

In some embodiments, as shown in fig. 15, the cooling plate includes a flow channel plate 430 and a support plate 440 which are connected in a stacked manner, the flow channel plate 430 has a flow channel for circulating a cooling medium, the mounting hole is a stepped hole penetrating the flow channel plate 430 and the support plate 440, and the first segment penetrates the flow channel plate 430 and abuts the support plate 440.

As shown in fig. 15, the flow field plate 430 may be disposed on the support plate 440, the flow field plate 430 may be used to provide a flow channel for the cooling medium, and the support plate 440 may be used to support the structure of the lower cooling plate 400.

As shown in fig. 15, the upper end surface of the first segment of the bushing 420 is connected with the lower end surface of the second segment, and the lower end surface of the first segment of the bushing 420 is connected with the support plate 440.

In a practical implementation, the first segment of the bushing 420 is inserted into and penetrates the flow channel plate 430 of the lower cooling plate 400, while the first segment of the bushing 420 is in contact with and connected to the support plate 440 of the lower cooling plate 400, the second segment of the bushing 420 is in contact with and connected to the outer frame 210 of the mounting frame 200, and the sealant layer 401 is disposed between the lower cooling plate 400 and the mounting frame 200, so that the lower cooling plate 400 is in a limit connection with the mounting frame 200 through the bushing 420 and the sealant layer 401 as a connection medium.

Like this, through the setting of runner plate 430 and backup pad 440, cooperation bush 420 and sealant layer 401 have realized the spacing fixed between cooling plate and the installation frame 200, when guaranteeing to connect closely, have effectively avoided the direct contact of cooling plate and installation frame 200 to the thermal insulation performance of battery package has been promoted.

In some embodiments, as shown in fig. 15, the second segment has a height H1 that satisfies: h1 is more than or equal to 1mm and less than or equal to 2mm.

For example, in some embodiments, the height H1 of the second section of the liner 420 is 1.5mm, and the thickness of the sealant layer 401 is 1.5mm.

Due to the height of the second section of the bushing 420, on the first hand, the situation that the expected heat preservation effect cannot be achieved due to the fact that the sealant layer 401 is too thin because the second section is too short is avoided; in the second aspect, the situation that the volume of the connecting medium is too large because the second section is too thick and the sealant layer 401 is too thick is avoided, so that the cost is saved.

In some embodiments, as shown in fig. 13-15, the diameter of the mounting holes is D1, and the distance between adjacent mounting holes is W1, such that:

8mm≤D1≤20mm，80mm≤W1≤120mm。

for example, in some embodiments, the diameter D1 of the mounting holes is 10mm, and the distance W1 between adjacent mounting holes is 100mm.

Through the arrangement of the diameters of the mounting holes and the distance between the adjacent mounting holes, on the one hand, the problem that the strength and the rigidity of the cooling plate are seriously reduced because the area of the hole area on the cooling plate is too large because the diameter of the mounting hole is too large or the distance between the adjacent mounting holes is too small is avoided; the second aspect prevents the contact area of the connection parts from being excessively small or the number of connection parts from being excessively small due to the excessively small diameter of the mounting holes or the excessively large distance between the adjacent mounting holes, thereby improving the reliability of the connection of the cooling plate to the mounting frame 200.

In some embodiments, as shown in fig. 13-15, the bushing 420 is made of a metal or resin material.

For example, in some embodiments, the bushing 420 is made of a resin material.

Thus, by the design of the material of the bushing 420, on the first hand, the plasticity of the processing material is strong, and the processing and manufacturing are easy; in the second aspect, the material of the bushing 420 has low thermal conductivity, and can suppress the temperature decrease rate in a low-temperature environment; in the third aspect, the bushing 420 is made of a material with good durability, can resist high temperature, low temperature and corrosion, and greatly prolongs the service life.

In some embodiments, as shown in fig. 15, the bushing 420 is provided with an escape hole 421, and the mounting frame 200 and the cooling plate are connected by a screw connector 403 penetrating the escape hole 421.

The threaded connection 403 may include a self-tapping screw, a countersunk screw, a set screw, or the like, for example, in some embodiments, as shown in fig. 15, the threaded connection 403 is a self-tapping screw. The self-tapping screws may include, but are not limited to, FDS screws (flow drill screws), CSD screws (machine dental screws), or other screws, such as, in some embodiments, threaded connectors 403 are FDS screws (flow drill screws), as shown in fig. 15.

In actual implementation, as shown in fig. 15, the relief hole 421 of the bushing 420 is in limit fit with the mounting hole of the lower cooling plate 400, the threaded connector 403 simultaneously passes through the relief hole 421 of the bushing 420 and the mounting hole of the lower cooling plate 400, the head of the threaded connector 403 abuts against the lower surface of the lower cooling plate 400, and the tail of the threaded connector 403 passes through the outer frame 210 of the mounting frame 200.

In this way, through the arrangement of the threaded connection member 403 and the avoiding hole 421, the cooling plate is fixedly connected with the mounting frame 200, and the connection among the bushing 420, the sealant layer 401, the cooling plate and the mounting is firmer, so that the structural strength of the connection part is increased, and the mechanical performance of the battery pack is optimized.

In some embodiments, as shown in fig. 11-12, the mounting frame 200 includes an outer frame 210, cross beams 220, and longitudinal beams 230, the outer frame 210, the cross beams 220, and the longitudinal beams 230 defining a plurality of mounting areas, the cooling plates include a lower cooling plate 400 and an upper cooling plate 300, the lower cooling plate 400 is connected to the outer frame 210, and the upper cooling plate 300 is connected to the cross beams 220.

The specific connection between the upper cooling plate 300 and the lower cooling plate 400 and the mounting frame 200 can be referred to the description of the following embodiments, and will not be described herein.

The application also discloses another battery pack.

A battery pack according to an embodiment of the present application is described below with reference to fig. 11 to 12.

In some embodiments, as shown in fig. 11-12, a battery pack includes: a battery mounting case and a battery module 100.

The battery mounting case refers to the battery mounting case of any of the above embodiments.

The battery module 100 is mounted in the mounting region and abuts against the cooling plate, and the battery module 100 may refer to the descriptions of other embodiments, which are not repeated herein.

Install the battery package of above-mentioned battery installation box and battery module 100, on the one hand, under low temperature environment, promoted the thermal insulation performance of battery package, guarantee that the battery package is in the temperature operation that suits more, on the other hand, reduce extra energy loss and latency because of low temperature heating causes, optimized the working property of battery package under extremely cold environment.

The application also discloses another battery pack.

A battery pack according to an embodiment of the present application is described below with reference to fig. 1 to 17.

In some embodiments, as shown in fig. 11-12, the battery pack further comprises: a mounting frame 200, a battery module 100, a lower cooling plate 400, and an upper cooling plate 300.

The mounting frame 200 includes an outer frame 210, longitudinal beams 230, and a plurality of cross beams 220, the outer frame 210, the cross beams 220, and the longitudinal beams 230 defining a plurality of mounting areas.

The battery module 100 is mounted in the mounting region.

The specific structures of the mounting frame 200 and the battery module 100 are described with reference to other embodiments, and are not described herein again.

For example, in some embodiments, as shown in fig. 5-6 and 16-17, the cooling method of the lower cooling plate 400 is liquid cooling, which will be described below by taking the cooling method of the lower cooling plate 400 as liquid cooling.

The upper cooling plate 300 may be used to maintain a uniform temperature, and the cooling manner of the upper cooling plate 300 may be air cooling, liquid cooling, or heat pipe, for example, in some embodiments, as shown in fig. 5-6 and fig. 16-17, the cooling manner of the upper cooling plate 300 is liquid cooling, which is described below by taking the cooling manner of the upper cooling plate 300 as liquid cooling.

In the related art, cooling treatment is performed on the large faces of the battery cells 110, that is, a multifunctional flexible cold plate is arranged between the large faces of the battery cells 110, and the cooling structure is in the form of a harmonica tube.

However, in the above technology, since the cooling structure used by the battery module is a harmonica tube, the structural strength is weak, the battery module 100 can float in the arrangement length direction, and the structural reliability is risky, especially, vibration and impact in the vertical direction due to the complete adhesion between the battery cell 110 and the top cover plate of the battery pack.

The battery pack that this application embodiment provided, through the setting of upper cooling plate 300 and lower floor's cooling plate 400, utilize box crossbeam 220 to replace module end plate 120, the thermal management performance of battery system can be promoted to the double-deck cooling plate, and the structure of many crossbeams 220 is connected into a whole with liquid cold drawing, electric core 110, box when strengthening battery system lower casing intensity, promotes battery system integration degree and structural strength simultaneously greatly guaranteeing thermal management performance.

In some embodiments, as shown in fig. 11-14, the periphery of the upper layer cooling plate 300 is provided with a plurality of first mounting holes 310 arranged at intervals, and the upper layer cooling plate 300 is fixedly connected with the cross beam 220 through threaded connectors 403 penetrating through the first mounting holes 310; the lower cooling plate 400 is provided at the outer circumference thereof with a plurality of second mounting holes 410 arranged at intervals, and the lower cooling plate 400 is fixedly coupled to the outer frame 210 by means of screw connectors 403 penetrating through the second mounting holes 410.

The shape of the first mounting hole 310 may be circular, triangular, square, etc., for example, in some embodiments, as shown in fig. 11, the shape of the first mounting hole 310 is circular. The number of the first mounting holes 310 may be one or more, wherein a plurality means 2 or more, for example, in some embodiments, 40 first mounting holes 310 are arranged on the periphery of the upper-layer cooling plate 300.

The shape of the second mounting hole 410 may be circular, triangular, square, etc., for example, in some embodiments, as shown in fig. 13, the shape of the second mounting hole 410 is circular. The number of the first mounting holes 310 may be one or more, wherein a plurality means 2 or more, for example, in some embodiments, the second mounting holes 410 are arranged at 50 on the periphery of the lower layer cooling plate 400.

The threaded connection 403 may include a self-tapping screw, a countersunk screw, a set screw, or the like, for example, in some embodiments, as shown in fig. 15, the threaded connection 403 is a self-tapping screw. The self-tapping screws may include, but are not limited to, FDS screws (flow drill screws), CSD screws (machine dental screws), or other screws, for example, in some embodiments, as shown in fig. 15, the threaded connectors 403 are FDS screws (flow drill screws), and the threaded connectors 403 are described below as FDS screws (flow drill screws).

In an actual implementation, as shown in fig. 12, FDS screws (flow drill screws) penetrate through the first mounting holes 310 of the upper cooling plate 300, and tail portions of the FDS screws (flow drill screws) are inserted into the cross-beams 220 of the mounting frame 200, by which the upper cooling plate 300 is connected to the mounting frame 200.

In an actual implementation, as shown in fig. 15, FDS screws (flow drill screws) penetrate through the second mounting holes 410 of the lower cooling plate 400, and the rear portions of the FDS screws (flow drill screws) are inserted into the outer frame 210 of the mounting frame 200, by which the lower cooling plate 400 is coupled to the mounting frame 200.

It can be understood that the FDS screw is not required to be punched or tapped in advance during connection, and the material to be fixed is melted through high-speed rotation to form a sealing structure.

Through the arrangement of the first mounting hole 310 and the second mounting hole 410, on the first hand, a good sealing effect is formed by matching with the mechanical property of an FDS (flow drilling screw), so that the cost is reduced from the production process, the production efficiency is improved, and meanwhile, the structural assembly strength is ensured; in the second aspect, the mounting frame 200, the battery module 100, the lower cooling plate 400, and the upper cooling plate 300 are sufficiently integrated, so that the rigidity and mode of the entire battery pack can be effectively improved.

In some embodiments, as shown in fig. 7, 11 and 13, at least one of the plurality of cross members 220 is provided with a mounting point 223 for connecting to a vehicle body, and the upper cooling plate 300 is provided with a through hole 320 opposite to the mounting point 223.

The mounting points 223 can be one or more, wherein a plurality represents 2 or more than 2, for example, in some embodiments, as shown in fig. 7, the beam 220 is provided with 4 mounting points 223.

In actual implementation, the plurality of mounting points 223 on the cross beam 220 are all connected with the connecting sleeve, and then the connecting sleeve is connected with the ground plate of the whole vehicle, so as to realize the assembly connection of the battery pack and the vehicle.

The shape of the via 320 may include a circle, a triangle, a square, or the like, for example, in some embodiments, as shown in fig. 11 and 13, the shape of the via 320 is a circle.

The number of the vias 320 may be one or more, wherein a plurality means 2 or more than 2, for example, in some embodiments, as shown in fig. 7, 4 vias 320 are provided on the upper cooling plate 300.

It should be noted that the number of mounting points 223 and vias 320 is equal, and the positions of the mounting points 223 and vias 320 are in one-to-one correspondence.

Thus, through the arrangement of the plurality of mounting points 223 on the cross beam 220 and the plurality of through holes 320 on the upper cooling plate 300, the battery pack structure participates in the strength of the vehicle body, the torsional rigidity of the vehicle body is improved, and stronger protection is provided for a passenger compartment when the side collision of the whole vehicle occurs, so that the safety performance of the whole vehicle is improved.

In some embodiments, as shown in fig. 6 and 11, the mounting points 223 comprise slots in the cross beam 220 that receive sleeves that extend through the holes 320.

The shape of the sleeve may include circular, triangular, square, etc., for example, in some embodiments, as shown in fig. 6 and 11, the sleeve is circular in shape.

There may be one or more sleeves, where a plurality means 2 or more than 2, for example, in some embodiments, as shown in fig. 7, the beam 220 is provided with 4 mounting points 223, and the sleeves are correspondingly provided with 4.

In practical implementation, the sleeves on the mounting points 223 penetrate through the through holes 320 of the upper-layer cooling plate 300 and are finally connected with the underbody, so that the whole battery pack is enabled to participate in the strength of the underbody.

Thus, the battery module 100, the mounting frame 200, the lower cooling plate 400 and the upper cooling plate 300 form an assembly body by the arrangement of the sleeves, and the strength of the overall structure of the battery pack is improved; and through the cooperation with a plurality of crossbeams 220, for battery module 100 provides pretightning force and position constraint, prolong the life of battery package.

In some embodiments, as shown in fig. 7 and 11, the mounting points 223 are disposed on the middle beam 220.

In a practical implementation, 5 cross beams 220 are arranged in the mounting frame 200, wherein the 5 cross beams 220 are arranged in a central symmetry with the central cross beam 220 as a symmetry axis, a sleeve is arranged on a mounting point 223 of the central cross beam 220, and the sleeve penetrates through the through hole 320 of the upper layer cooling plate 300, and finally the sleeve is connected with the vehicle body.

Through the position design of the mounting point 223, the connection part of the battery pack and the vehicle body is closer to the geometric center of the battery pack, the situation that the battery pack deflects or falls off due to overlarge mass difference of two sides of the connection part is avoided, the movement of the battery pack in the vehicle is reduced, the torsional rigidity of the connection structure is increased, and therefore the working performance of the whole vehicle is optimized.

In some embodiments, as shown in fig. 12, the battery module 100 is bonded to the lower and

upper cooling plates

400 and 300 by a heat conductive structural adhesive 402.

The heat-conductive structural adhesive 402 used between the battery module 100 and the lower cooling plate 400 and the heat-conductive structural adhesive 402 used between the battery module 100 and the upper cooling plate 300 have been described in detail in the above embodiments, and are not described again.

Through the arrangement of the heat-conducting glue, on one hand, the direct contact of the battery module 100 with the lower-layer cooling plate 400 and the upper-layer cooling plate 300 is reduced, and the speed of reducing the temperature in the battery pack in a low-temperature environment is prevented from being increased; on the other hand, the upper and lower layers of the battery module 100 are bonded and fixed while conducting heat.

End plates 120 are located at the ends of the plurality of cells 110.

The side plates 101 are located on the outer side surfaces of the two outermost battery cells 110, and the side plates 101 stop against the mounting frame 200.

The specific structure of the insulation mat 103 is described with reference to other embodiments.

In some embodiments, as shown in fig. 3 to fig. 4, electric core 110 includes: a housing 111, a pole piece and two cover plate assemblies 112.

The pole core is disposed within the housing 111.

The two cover plate assemblies 112 are respectively installed at two ends of the housing 111, and both the two cover plate assemblies 112 include an explosion-proof valve 113 and a plurality of poles 114.

Components of the housing 111, the pole core, and the two cover plate assemblies 112 of the electric core 110 are described with reference to other embodiments.

The application also discloses another battery pack.

A battery pack according to an embodiment of the present application is described below with reference to fig. 1 to 19.

In some embodiments, as shown in fig. 5-6, the battery pack further comprises: bottom shield 800, upper cover 900, lower cooling plate 400, upper cooling plate 300, first pinboard 600, and second pinboard 700.

The bottom guard 800 is mounted to the bottom of the mounting frame 200.

The upper cover 900 is mounted on the top of the mounting frame 200.

The upper cover 900 may serve to protect the upper top surface of the battery pack, and in actual implementation, when the battery pack rubs or collides with other elements, the upper cover 900 protects the top of the battery pack from being damaged; meanwhile, when the hot air in the battery module 100 is exhausted to the outside, the upper cover 900 prevents the hot air from continuing to move upward and damaging other components connected to the battery pack.

The lower cooling plate 400 is located between the bottom sheathing 800 and the lower surface of the battery module 100, and the lower cooling plate 400 is fixedly connected to the outer frame 210.

In practical implementation, when the battery pack is in operation, a large amount of excess heat is generated and is transferred to each other by surface contact with the upper cooling plate 300 and the lower cooling plate 400, the cooling medium is injected into the upper cooling plate 300 from the upper cooling plate inlet 330, and at the same time, the cooling medium is injected into the lower cooling system from the lower cooling plate inlet 430, the injected cooling medium circulates in the upper cooling plate 300 and the lower cooling plate 400, and the upper cooling plate 300 and the lower cooling plate 400 transfer high heat by means of liquid flow by using the characteristic of large heat exchange coefficient of liquid flow, and the high heat is taken away by the cooling medium passing through the upper cooling plate 300 and the lower cooling plate 400 and is finally discharged from the upper cooling plate outlet 340 and the lower cooling plate outlet 440.

However, in the above technology, since the cooling structure used by the battery module is a harmonica tube, the structural strength is weak, the battery module 100 can float in the arrangement length direction, and the structural reliability is at risk, especially vibration and impact in the vertical direction, due to the fact that the battery cell 110 is completely adhered to the top cover plate of the battery pack.

The first insertion plate 600 comprises a first main water inlet 610, a first water inlet connector 620 communicated with the first main water inlet 610, a second main water inlet 630 and a second water inlet connector 640 communicated with the second main water inlet 630, wherein the first main water inlet 610 and the second main water inlet 630 are used for being connected with a water supply end of the whole vehicle, the first water inlet connector 620 is connected with an inlet of the upper-layer cooling plate 300, and the second water inlet connector 640 is connected with an inlet of the lower-layer cooling plate 400.

As shown in fig. 16 to 17, the first main water inlet 610 and the upper cooling plate inlet 330 may be communicated through a first pipe, one end of the first pipe may be connected to the first water inlet connector 620, and the other end of the first pipe may be connected to the upper cooling plate inlet 330, so as to communicate the first main water inlet 610 and the upper cooling plate inlet 330, and the first pipe may be communicated with the upper cooling plate 300 and the first water inlet connector 620 through a quick connector.

As shown in fig. 16-17, the second main water inlet 630 and the lower cooling plate inlet 430 may be communicated through a second pipe, one end of the second pipe may be connected to the second water inlet connector 640, and the other end of the second pipe may be connected to the lower cooling plate inlet 430, so as to communicate the second main water inlet 630 and the lower cooling plate inlet 430, and the second pipe may be communicated with the lower cooling plate 400 and the first water inlet connector 620 through the quick connector.

The first main water inlet 610 and the second main water inlet 630 may be controlled and communicated to the vehicle water supply end through pipeline valves, such as, but not limited to, a three-way valve, a pressure reducing valve, a stop valve, or a plug valve, for example, in some embodiments, the first main water inlet 610 and the second main water inlet 630 are communicated with the vehicle end water inlet through the three-way valve.

The three-way valves of the first main water inlet 610 and the second main water inlet 630 may be arranged outside the battery pack, or the three-way valves of the first main water inlet 610 and the second main water inlet 630 may be arranged inside the battery pack, for example, in some embodiments, the three-way valves of the first main water inlet 610 and the second main water inlet 630 are arranged outside the battery pack.

The second plugboard 700 comprises a first main water outlet 710, a first water outlet connector 720 communicated with the first main water outlet 710, a second main water outlet 730 and a second water outlet connector 740 communicated with the second main water outlet 730, wherein the first main water outlet 710 and the second main water outlet 730 are used for being connected with a water return end of the whole vehicle, the first water outlet connector 720 is connected with an outlet of the upper-layer cooling plate 300, and the second water outlet connector 740 is connected with an outlet of the lower-layer cooling plate 400.

As shown in fig. 16-17, the first main water outlet 710 and the upper cooling plate outlet 340 may be communicated through a third pipe, one end of the third pipe may be connected to the first water outlet connector 720, and the other end of the third pipe may be connected to the upper cooling plate outlet 340, so as to communicate the first main water outlet 710 and the upper cooling plate outlet 340, and the third pipe may be communicated with the upper cooling plate 300 and the first water outlet connector 720 through a quick connector.

As shown in fig. 16-17, the second main water outlet 730 and the lower cooling plate outlet 440 can be communicated through a fourth pipe, one end of the fourth pipe can be connected to the second water outlet connector 740, and the other end of the fourth pipe can be connected to the lower cooling plate outlet 440, so that the second main water outlet 730 is communicated with the lower cooling plate outlet 440, and the fourth pipe can be communicated with the lower cooling plate 400 and the first water outlet connector 720 through the quick connector.

The first main water outlet 710 and the second main water outlet 730 can be controlled by pipeline valves, such as but not limited to a three-way valve, a pressure reducing valve, a stop valve, or a plug valve, and are connected to the vehicle-end water inlet.

The three-way valves of the first main water outlet 710 and the second main water outlet 730 may be disposed outside the battery pack, or the three-way valves of the first main water outlet 710 and the second main water outlet 730 may be disposed inside the battery pack, for example, in some embodiments, the three-way valves of the first main water outlet 710 and the second main water outlet 730 are disposed outside the battery pack.

In practical implementation, the first main water inlet 610 and the second main water inlet 630 are communicated with a vehicle-end water inlet through a three-way valve, the first main water outlet 710 and the second main water outlet 730 are communicated with a vehicle-end water inlet through a three-way valve, the 2 three-way valves are all arranged outside the battery system, the three-way valves of the first main water inlet 610 and the second main water inlet 630 can be changed into a three-way control valve with adjustable flow according to the flow distribution condition of the battery system, the flow can be adjusted up and down according to the working condition of the vehicle end, meanwhile, the flow of the first main water inlet 610 and the flow of the second main water inlet 630 are evenly distributed, when the battery system is charged quickly, the total flow is designed to be 25L/min, and the requirement of high-rate quick charging and heat dissipation is met.

In the correlation technique, the main inlet outlet of battery package adopts single-in single-out structural design, but along with the improvement of battery package multiplying power that charges, battery package heat dissipation demand also promotes gradually simultaneously, and the above-mentioned structural design who singly advances single-out can't satisfy the high multiplying power heat dissipation demand of battery package.

According to the battery pack provided by the embodiment of the application, through the double-in and double-out structural design and the position arrangement of the three-way valve, on the one hand, the complicated design that the three-way valve is additionally arranged inside the battery pack is avoided, the utilization rate of the internal space of a battery system is facilitated, and the leakage risk inside the battery pack is reduced; in the second aspect, the flow of the cooling plate can be adjusted by the three-way valve, the flow of the liquid cooling system is improved, and the heat dissipation power is improved, so that the requirement of high-magnification quick charging is met.

In some embodiments, as shown in fig. 5-7 and 16-17, the mounting frame 200 includes: the outer frame 210, the cross beams 220 and the longitudinal beams 230, the outer frame 210, the cross beams 220 and the longitudinal beams 230 defining a plurality of mounting areas, the outer frame 210 and the forwardmost cross beam 220 defining a pipe receiving area therebetween, and the first and

second pinboards

600 and 700 being mounted to the pipe receiving area.

It is understood that the first, second, third and fourth pipelines may be disposed in the pipeline receiving area.

The first patch panel 600 may be mounted to the duct receiving area by welding, bolting, or gluing, for example, in some embodiments, the first patch panel 600 is mounted to the duct receiving area by bolting.

The second patch panel 700 may be mounted to the tube receiving area by welding, bolting, or gluing, for example, in some embodiments, the second patch panel 700 is mounted to the tube receiving area by bolting.

Through the design of the pipeline containing area, on the basis of improving the flow of the battery pack, the size of the internal pipeline of the battery pack is not increased, and the upper-layer cooling plate 300 and the lower-layer cooling plate 400 are controlled by flow through different pipelines, so that the flow distribution is facilitated.

In some embodiments, as shown in fig. 16-19, the first patch panel 600 includes a first flange 650, the second patch panel 700 includes a second flange 750, the first flange 650 is fixedly connected to the front beam 212, and the second flange 750 is fixedly connected to the front beam 212.

As shown in fig. 18, the first main water inlet 610 may be connected with a first flange 650, and the second main water inlet 630 may be connected with the first flange 650, so that the first main water inlet 610 and the second main water inlet 630 are fixedly connected by the first flange 650.

The first flange 650 is connected to the first main water inlet 610 and the second main water inlet 630 by welding, bolting, or gluing, for example, in some embodiments, the first flange 650 is fixedly connected to the first main water inlet 610 and the second main water inlet 630 by welding.

The first flange 650 may be coupled to the front beam 212 by welding, bolting, or gluing, for example, in some embodiments, the first flange 650 may be fixedly coupled to the front beam 212 by bolting. The connecting members for bolting may include M4 bolts, M5 bolts, M6 bolts, M8 bolts, M10 bolts, etc., for example, in some embodiments, the first flange 650 is fixedly connected to the front beam 212 by the M5 bolts.

As shown in fig. 19, the first main water outlet 710 may be connected to the second flange 750, and the second main water outlet 730 may be connected to the second flange 750, so that the first main water outlet 710 and the second main water outlet 730 are fixedly connected by the second flange 750.

The second flange 750 is connected to the first main water outlet 710 and the second main water outlet 730 by welding, bolting, or gluing, for example, in some embodiments, the second flange 750 is fixedly connected to the first main water outlet 710 and the second main water outlet 730 by welding.

The second flange 750 is connected to the front beam 212 by welding, bolting, or gluing, for example, in some embodiments, the second flange 750 is fixedly connected to the front beam 212 by bolting. The connecting member for bolting may include M4 bolt, M5 bolt, M6 bolt, M8 bolt, M10 bolt, etc., for example, in some embodiments, the second flange 750 is fixedly connected to the front beam 212 by the M5 bolt.

Through the setting of above-mentioned first flange 650 and second flange 750, combine two water inlet structural style, improve battery package transmission flow by times to improve the heat dissipation power of battery package, satisfy the heat dissipation demand that fills soon of big multiplying power.

In some embodiments, as shown in fig. 16-19, a seal ring is clamped between each of the first and

second flanges

650, 750 and the front beam 212.

The material of the sealing ring may include, but is not limited to, metal, plastic, rubber, silicone, metal-clad rubber, or metal-clad silicone, for example, in some embodiments, the material of the sealing ring clamped between the first flange 650 and the second flange 750 and the front beam 212 is rubber.

In a practical implementation, the first main water inlet 610 and the second main water inlet 630 are fixedly connected to the first flange 650, the first main water outlet 710 and the second main water outlet 730 are fixedly connected to the second flange 750, and then the first flange 650 and the second flange 750 are connected to the front beam 212 of the mounting frame 200 and are sealed by the sealing ring, so that the first plug board 600 and the second plug board 700 are fixedly connected to the front beam 212.

Like this, through the setting of above-mentioned sealing washer, when guaranteeing that the interior outer seal structure of installation frame 200 satisfies the designing requirement, reduced coolant and revealed, the risk of battery package weeping.

In some embodiments, the inlet of the upper cooling plate 300 is located on the first side of the upper cooling plate 300, the outlet of the upper cooling plate 300 is located on the second side of the upper cooling plate 300, the inlet of the lower cooling plate 400 is located on the second side of the lower cooling plate 400, and the outlet of the lower cooling plate 400 is located on the first side of the lower cooling plate 400.

The inlet and outlet cross arrangement of the upper cooling plate 300 and the lower cooling plate 400 is described in the above embodiments, and will not be described herein again.

The specific arrangement of the heat-conducting adhesives among the battery module 100, the upper-layer cooling plate 300 and the lower-layer cooling plate 400 is described in the above embodiments, and will not be described herein again.

In some embodiments, as shown in fig. 16-17, the upper cooling plate 300 includes two sub-plates arranged in a laterally spaced apart arrangement, with the tails of the two sub-plates connected by a conduit.

As shown in fig. 16, one of the sub-plates of the upper cooling plate 300 may include an upper cooling plate inlet 330, and the other sub-plate of the upper cooling plate 300 may include an upper cooling plate outlet 340, and one end of a pipe is connected to one of the sub-plates of the upper cooling plate 300 and the other end of the pipe is connected to the other sub-plate of the upper cooling plate 300, thereby achieving connection between the two sub-plates of the upper cooling plate 300.

In a practical implementation, the cooling medium flows from the upper cooling plate inlet 330 on one of the sub-plates, through the conduit connecting the two sub-plates, and onto the other sub-plate, and finally, the cooling medium flows out from the upper cooling plate outlet 340 on the other sub-plate.

Thus, through the arrangement of the two sub-boards, on one hand, the partitions cool the plurality of battery modules 100 on the two sides of the mounting frame 200, and the structural layout is compact and reasonable; on the other hand, the cooling plate is convenient to disassemble and maintain, the area of the cooling plate in a non-functional area is reduced, and the material cost is saved.

A heat insulation pad 103 is interposed between adjacent battery cells 110.

End plates 120 are located at the ends of the plurality of cells 110.

The battery module 100 in the battery pack can refer to the descriptions in other embodiments, and the specific structures of the battery cells 110, the heat insulation pads 103, the end plates 120, the side plates 101, the elastic pads 102, and the like in the battery module 100 can all refer to the descriptions in other embodiments.

The pole piece is disposed within the housing 111.

The components of the housing 111, the pole core, and the two cover plate assemblies 112 of the battery cell 110 are described with reference to other embodiments.

The application also discloses a vehicle, and this vehicle includes any one of above-mentioned battery package.

The vehicle provided with the battery pack has high-power bearing capacity and high-rate quick charging performance, and is convenient to start and accelerate; on the other hand, the vehicle has good thermal management capability, realizes large-rate quick charging in a full temperature range, and finally achieves the functional linkage of quick temperature rise in a low-temperature section, large-rate charging in a normal-temperature section and temperature balance in a high-temperature section, so that the safety performance of the vehicle is improved, and the service life of the vehicle is prolonged.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application are capable of operation in sequences other than those illustrated or described herein, and that the terms "first," "second," etc. are generally used in a generic sense and do not limit the number of terms, e.g., a first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer" are used in an orientation or positional relationship based on that shown in the figures, merely to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the application.

In the description of the present application, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present application, "a plurality" means two or more.

In the description of the present application, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact not directly but via another feature therebetween.

In the description of the present application, the first feature being "on," "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module, comprising:

the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are arranged side by side along the thickness direction;

an end plate located at an end of the plurality of cells;

2. The battery module according to claim 1, wherein a heat insulation pad is sandwiched between the adjacent cells.

3. The battery module according to any one of claims 1-2, wherein the cell comprises:

a housing;

the pole core is arranged in the shell;

and the two cover plate assemblies are respectively arranged at two ends of the shell and respectively comprise an explosion-proof valve and a plurality of polar columns.

4. The battery module of claim 1, wherein the end plate is provided with a plurality of pressure relief holes, and the plurality of pressure relief holes on each end plate correspond to the plurality of cells one to one.

5. A battery pack, comprising:

a mounting frame;

the battery module according to any one of claims 1 to 4, which is mounted in the mounting frame with the elastic pad in a compressed state.

6. The battery pack according to claim 5, further comprising:

the bottom guard plate is arranged at the bottom of the mounting frame;

the upper cover is mounted on the top of the mounting frame;

7. The battery pack according to claim 6, wherein the inlet/outlet of the lower cooling plate is arranged to intersect with the inlet/outlet of the upper cooling plate.

8. The battery pack according to claim 7, wherein the battery module is bonded to the lower cooling plate and the upper cooling plate by a heat conductive structural adhesive, and the heat conductive structural adhesive at the inlet has a lower heat conductivity than the heat conductive structural adhesive at the outlet.

9. The battery pack of any of claims 6-8, wherein the mounting frame comprises:

the battery module comprises an outer frame, a cross beam and longitudinal beams, wherein a plurality of installation areas are defined by the outer frame, the cross beam and the longitudinal beams, the battery modules are arranged in the installation areas, and the side plates abut against the cross beam.

10. The battery pack of claim 9, wherein the cross member is provided with a first notch at a position crossing the side member and a second notch at a position connected to the outer frame.

11. The battery pack of claim 10, further comprising:

and the second fireproof layer is arranged between the second notch and the upper cover.

12. A vehicle, characterized by comprising: the battery pack according to any one of claims 5 to 11.