CN219303908U - Battery module and battery pack - Google Patents

Abstract

The application provides a battery module and battery package, battery module include battery pack, electrically conductive piece and fire prevention insulating piece, and battery pack is a plurality of, and every battery pack includes a plurality of electric cores that set gradually along first direction, and the electric core is provided with the relief valve; the conductive piece is used for connecting a plurality of battery assemblies and is positioned at one side of the battery assembly provided with the pressure relief valve; the fireproof insulating piece is arranged between the battery assembly and the conductive piece, and in the second direction, the projection of the pressure release valve on the battery assembly is positioned in the projection range of the fireproof insulating piece on the battery assembly; wherein the first direction and the second direction are perpendicular to each other; thereby stop the direct injection of relief valve spun high temperature flue gas and electrically conductive fuse to electrically conductive spare through the fire prevention insulating part, avoid electrically conductive spare to take place situations such as short circuit or arc, simultaneously, because the assembly of fire prevention insulating part is comparatively simple, need not to consume a large amount of manpower and materials, therefore can guarantee the assembly efficiency of battery package.

Description

Battery module and battery pack

Technical Field

The application belongs to the technical field of battery packs, and particularly relates to a battery module and a battery pack.

Background

In a battery pack, the mutual electric connection of each battery assembly is generally realized through a conductive part, in the working process of the battery pack, the heat generated by an electric core in the battery assembly is accumulated, so that the electric core is possibly out of control, at the moment, a pressure release valve of the electric core is automatically opened to spray out high-temperature smoke inside the electric core, however, when the high-temperature smoke is sprayed out from the inside of the electric core, a large amount of conductive melt is sprayed out to drive part of the conductive melt, so that direct spraying of the conductive part is formed, the situations such as short circuit or arc discharge and the like of the conductive part are caused, and even the battery pack is ignited and exploded.

At present, a large amount of insulating fireproof layers are generally wound on the periphery of the conductive member so as to avoid direct contact between high-temperature conductive melt and the conductive member, but a large amount of labor and time are required in the process of winding the insulating fireproof layers, and the assembly efficiency of the battery pack may be affected.

Disclosure of Invention

The embodiment of the application provides a battery module and battery pack, conductive melt when can avoid electric core thermal runaway strikes conductive piece, causes conductive piece short circuit or draws the arc, guarantees the assembly efficiency of battery pack simultaneously.

In one aspect, an embodiment of the present application provides a battery module, including a plurality of battery assemblies, a conductive member and a fireproof insulating member, where each battery assembly includes a plurality of battery cells sequentially arranged along a first direction, and the battery cells are provided with pressure release valves; the conductive piece is used for connecting a plurality of battery assemblies and is positioned at one side of the battery assembly provided with the pressure relief valve; the fireproof insulating piece is arranged between the battery assembly and the conductive piece, and in the second direction, the projection of the pressure release valve on the battery assembly is positioned in the projection range of the fireproof insulating piece on the battery assembly; wherein the first direction and the second direction are perpendicular to each other.

According to one aspect of the application, the battery module further comprises a flame retardant colloid, and the conductive member is fixedly connected with the fireproof insulating member through the flame retardant colloid.

According to an aspect of the application, the battery module further comprises a heat exchange plate arranged between the battery assembly and the fireproof insulating piece, the heat exchange plate is mutually attached to the battery assembly, and pressure relief openings corresponding to the pressure relief valves one by one are formed in the heat exchange plate.

According to one aspect of the application, the heat exchange plate protrudes to form protruding portions located on two sides of the pressure relief opening along the third direction respectively, the protruding portions are abutted to the fireproof insulating piece to form a pressure relief channel between the heat exchange plate and the fireproof insulating piece, and the third direction is intersected with the first direction.

According to one aspect of the application, the heat exchange plate comprises a first sub-plate and a second sub-plate, the first sub-plate and the second sub-plate are both provided with pressure relief openings, the second sub-plate is located on one side of the first sub-plate, facing the fireproof insulating piece, the second sub-plate protrudes to form a protruding part, and the first sub-plate and the second sub-plate form a part with the protruding part to enclose to form a heat exchange flow channel.

According to an aspect of the application, the battery module further comprises a connection colloid, and the protruding portion and the fireproof insulating piece are bonded through the connection colloid.

According to one aspect of the application, the battery module further comprises a buffer member fixedly arranged on one side of the conductive member, which is away from the battery assembly.

According to one aspect of the application, the outer circumferential coating of the conductive member is provided with an insulating layer.

On the other hand, the embodiment of the application also provides a battery pack, which comprises a battery box and the battery module set according to any one of the above, wherein the battery box comprises a box body and a box cover, and the box body and the box cover are enclosed to form an accommodating space; the battery module is accommodated in the accommodating space.

According to one aspect of the application, the case cover is located on one side of the battery module, where the pressure release valve is located, and the case cover is a flame-retardant insulating case cover.

The embodiment of the application provides a battery module and a battery pack, wherein the battery module comprises a plurality of battery assemblies, conductive pieces and fireproof insulating pieces, each battery assembly comprises a plurality of battery cores which are sequentially arranged along a first direction, and a pressure release valve is arranged on a shell of each battery core; the conductive piece is used for connecting a plurality of battery assemblies and is positioned at one side of the battery assembly provided with the pressure relief valve; the fireproof insulating part is arranged between the battery assembly and the conductive part, the projection of the pressure release valve on the battery assembly is positioned in the projection range of the fireproof insulating part on the battery assembly along the second direction, and the first direction is perpendicular to the second direction, so that high-temperature smoke and conductive melt sprayed out of the pressure release valve can be prevented from directly spraying the conductive part through the fireproof insulating part when the battery core is out of control, the conditions such as short circuit or arc discharge and the like of the conductive part are prevented, and the battery pack is prevented from being exploded, and at the moment, compared with the case that the fireproof insulating layer is wound on the periphery of the conductive part in the prior art, the fireproof insulating part is simpler in arrangement, and does not need to consume a large amount of manpower and material resources, so that the assembly efficiency of the battery pack can be ensured; and when the fire-proof insulating piece blocks the direct injection of the high-temperature smoke and the conductive melt, the fire-proof insulating piece can drive the conductive piece to move along the second direction towards the direction far away from the battery assembly, so that the high-temperature smoke and the conductive melt can be discharged from between the protective insulating piece and the battery assembly, the accumulation of the temperature in the battery assembly can be avoided, and the battery assembly is prevented from firing or even exploding due to the high temperature.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

Fig. 1 is a schematic structural view of a battery module according to some embodiments of the present application;

FIG. 2 is a schematic view of a battery assembly provided in some embodiments of the present application;

fig. 3 is another structural schematic view of a battery module provided in some embodiments of the present application;

FIG. 4 is a cross-section provided by some embodiments of the present application;

FIG. 5 is an enlarged view of A-A of FIG. 4;

fig. 6 is a schematic structural view of a battery pack provided in some embodiments of the present application;

description of the reference numerals:

a battery module 10; a battery assembly 101; a conductive member 102; a fireproof insulation 103; a pressure relief valve 104; a heat exchange plate 105; a pressure relief opening 106; a convex portion 107; a pressure relief passage 108; a first sub-board 109; a second sub-board 110; a heat exchange flow passage 111; a buffer 112;

a battery box 20; a case 201; a cover 202; an accommodation space 203;

a first direction X; a second direction Z; and a third direction Y.

Detailed Description

Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to explain the present application and are not configured to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

In order to solve the prior art problem, the embodiment of the application provides a battery module and a battery pack. The following first describes a battery module provided in an embodiment of the present application.

Fig. 1 is a schematic structural view of a battery module according to some embodiments of the present application, and fig. 2 is a schematic structural view of a battery module according to some embodiments of the present application.

As shown in fig. 1 and fig. 2, in one aspect, the embodiment of the present application provides a battery module 10, including a plurality of battery assemblies 101, a conductive member 102 and a fireproof insulating member 103, where each battery assembly 101 includes a plurality of electric cores sequentially arranged along a first direction X, and the electric cores are provided with a pressure release valve 104; the conductive member 102 is used for connecting a plurality of battery assemblies 101, and the conductive member 102 is positioned on one side of the battery assemblies 101 where the pressure relief valve 104 is arranged; the fireproof insulating part 103 is arranged between the battery assembly 101 and the conductive part 102, and in the second direction Z, the projection of the pressure release valve 104 on the battery assembly 101 is positioned in the projection range of the fireproof insulating part 103 on the battery assembly 101; wherein the first direction X and the second direction Z are perpendicular to each other.

The first direction X may be a length direction or a width direction of the battery module 10, and the second direction Z may be a height direction of the battery module 10; specifically, in each battery assembly 101, the plurality of electric cells may be electrically connected in sequence along the first direction X; the two different battery assemblies 101 are electrically connected through the conductive members 102, and the different conductive members 102 can be connected in series or in parallel, so that the plurality of battery assemblies 101 are electrically connected; the number of the conductive members 102 between the two battery modules 101 may be one or plural, and is not particularly limited herein.

The fireproof insulating part 103 can be made of an insulating and nonflammable material, preferably the fireproof insulating part 103 can be made of a material capable of bearing the high temperature of more than 1400 degrees, for example, mica can be used for making the fireproof insulating part 103, or other composite materials can be used for making the fireproof insulating part 103, such as a composite material of mica and ceramic fibers; the fireproof insulating member 103 may be a plate-shaped structure, and the thickness of the fireproof insulating member 103 may be between 1.5mm and 3mm, so as to ensure that the fireproof insulating member 103 can effectively block high-temperature smoke and conductive melt ejected by the pressure release valve 104, and it is understood that the thickness of the fireproof insulating member 103 may be determined according to the specification of the battery cell in practical application, and is not specifically limited herein.

In the second direction Z, the projection of the pressure release valve 104 on the battery assembly 101 is located within the projection range of the fireproof insulating member 103 on the battery assembly 101, that is, the fireproof insulating member 103 can cover the pressure release valve 104 of each cell, at this time, when one or more cells in the battery assembly 101 are out of control, the fireproof insulating member 103 can effectively block high-temperature flue gas and direct injection of conductive melt discharged by the corresponding pressure release valve 104 to the conductive body, thereby preventing the conductive body from short-circuiting or arcing and other conditions, and avoiding ignition or even explosion of the battery pack caused by short-circuiting or arcing of the conductive member 102; meanwhile, when the fireproof insulating part 103 blocks the high-temperature smoke and the conductive melt from being directly sprayed, the fireproof insulating part 103 can drive the conductive part 102 to move along the second direction Z towards the direction far away from the battery assembly 101 under the impact of the high-temperature smoke and the conductive melt, so that the high-temperature smoke and the conductive melt can be discharged from between the protective insulating part and the battery assembly 101, accumulation of temperature in the battery assembly 101 can be avoided, and the battery assembly 101 is prevented from firing or even exploding due to high temperature.

In this embodiment, because only need set up fire prevention insulating part 103 between electrically conductive piece 102 and battery pack 101 to guarantee that relief valve 104 is located fire prevention insulating part 103 along the projection of second direction Z at battery pack 101 along the projection scope of second direction Z at battery pack 101, can effectively block the direct injection of corresponding relief valve 104 exhaust high temperature flue gas and electrically conductive fuse to the electric conductor, for among the prior art through twining the fire prevention insulating layer at the periphery of electrically conductive piece 102, the setting of fire prevention insulating part 103 of this application is comparatively simple, need not to consume a large amount of manpower and materials, thereby can improve the assembly efficiency of battery package to a certain extent.

Further, the conductive member 102 may be a bent copper bar or a conductive wire, or the conductive member 102 may be a combined structure of the bent copper bar and the conductive wire, and at this time, the conductive member 102 is a flexible connection structure, which has a certain buffering performance, so when the fireproof insulating member 103 is impacted by high-temperature smoke and conductive melt, and the impact force is transmitted to the conductive member 102 through the fireproof insulating member 103, the conductive member 102 will not break due to stress.

Alternatively, in the battery module 10, the number of the fire-preventing insulating members 103 is one, and the fire-preventing insulating members 103 cover each of the pressure release valves 104 in each of the battery modules 101.

Alternatively, the number of the fire-resistant insulating members 103 in the battery module 10 is plural, the plurality of fire-resistant insulating members 103 are provided in one-to-one correspondence with the plurality of battery modules 101, and each fire-resistant insulating member 103 covers the pressure release valve 104 in one battery module 101.

Optionally, the number of the fireproof insulation members 103 in the battery module 10 is plural, wherein one fireproof insulation member 103 may cover the pressure release valve 104 in at least one battery assembly 101, and the number of the battery assemblies 101 covered by different fireproof insulation members 103 may be the same or different.

According to an aspect of the present application, the battery module 10 further includes a flame retardant gel, and the conductive member 102 is fixedly connected with the fireproof insulating member 103 through the flame retardant gel.

The flame retardant colloid is a colloid which is not easy to burn at high temperature; it can be appreciated that when one or more cells in the battery assembly 101 are thermally out of control, the fireproof insulating member 103 is impacted by the high-temperature flue gas and the conductive melt ejected from the corresponding pressure release valve 104, which may drive the conductive member 102 to move along the second direction Z towards a direction away from the battery assembly 101, and in this process, if the conductive member 102 and the fireproof insulating member 103 are shifted or even fall off, the fireproof insulating member 103 cannot sufficiently protect the conductive member 102, so that a short circuit or arc of the conductive member 102 may be caused, and safety accidents such as fire or explosion of the battery pack may be caused.

Therefore, in this embodiment, the fixed connection between the conductive member 102 and the fireproof insulating member 103 is achieved by setting the flame retardant colloid, so that the conductive member 102 and the fireproof insulating member 103 are prevented from being displaced or even falling off, the fireproof insulating member 103 is guaranteed to fully protect the conductive member 102, and meanwhile, the flame retardant colloid cannot burn due to overhigh temperature, so that phenomena such as short circuit or arc discharge of the conductive member 102 can be further avoided, and the safety performance of the battery pack is guaranteed.

Fig. 3 is another structural schematic view of a battery module according to some embodiments of the present application, and fig. 4 is a cross-sectional view according to some embodiments of the present application.

As shown in fig. 3 and 4, according to an aspect of the present application, the battery module 10 further includes a heat exchange plate 105 disposed between the battery assembly 101 and the fireproof insulation 103, the heat exchange plate 105 is attached to the battery assembly 101, and pressure release openings 106 corresponding to the pressure release valves 104 one by one are formed in the heat exchange plate 105.

A heat exchange flow passage 111 is formed in the heat exchange plate 105, and the heat exchange flow passage 111 is used for circulation of heat exchange medium; the heat exchange plate 105 is attached to the battery assembly 101, and the heat exchange plate 105 and the battery assembly 101 can be fixedly connected through bolts or heat conducting glue, so that heat exchange is performed between a heat exchange medium flowing through the heat exchange plate 105 and a plurality of battery cells in the battery assembly 101, and the possibility of thermal runaway of the battery cells is reduced.

In this embodiment, by arranging the heat exchange plate 105 between the battery assembly 101 and the fireproof insulating member 103, the heat exchange plate 105 is attached to the battery assembly 101, and the pressure release openings 106 corresponding to the pressure release valves 104 one by one are formed on the heat exchange plate 105, so that when one or more of the electric cores in the battery assembly 101 are out of control, the high-temperature flue gas and the conductive melt discharged from the corresponding pressure release valves 104 need to be sprayed to the fireproof insulating member 103 through the pressure release openings 106, and in this process, the heat exchange plate 105 exchanges heat with the sprayed high-temperature flue gas and the sprayed conductive melt to a certain extent, so as to reduce the temperature of the high-temperature flue gas and the conductive melt, thereby ensuring the protection effect of the fireproof insulating member 103 on the conductive member 102.

Further, the side of the heat exchange plate 105 close to the battery assembly 101 is sprayed with an insulating paint to ensure electrical insulation between the heat exchange plate 105 and the cells in the battery assembly 101.

Alternatively, the number of the heat exchange plates 105 in the battery module 10 may be one, and in this case, the heat exchange plates 105 are respectively attached to all the battery modules 101 in the battery module 10.

Alternatively, the number of the heat exchange plates 105 in the battery module 10 may be plural, and one heat exchange plate 105 may be attached to one battery module 101 or attached to a plurality of battery modules 101, for example, two battery modules 101 electrically connected through the conductive member 102 may be attached to one heat exchange plate 105 at the same time.

Fig. 5 is an enlarged view A-A of fig. 4.

As shown in fig. 5, according to an aspect of the present application, the heat exchange plate 105 protrudes to form protruding portions 107 located on both sides of the pressure relief opening 106 along the third direction Y, and the protruding portions 107 abut against the fireproof insulating member 103 to form a pressure relief channel 108 between the heat exchange plate 105 and the fireproof insulating member 103, and the third direction Y is disposed intersecting the first direction X.

The third direction Y may be a length direction or a width direction of the battery module 10, and is disposed to intersect the first direction X, preferably may be perpendicular to the first direction X, and is a width direction of the battery module 10 when the first direction X is a length direction of the battery module 10, and is a length direction when the first direction X is a width direction of the battery module 10; it will be appreciated that the third direction Y is perpendicular to the second direction Z.

The protruding portion 107 is formed by protruding the heat exchange plate 105, specifically, the heat exchange plate 105 protrudes in the second direction Z toward the side close to the fireproof insulating member 103; the protrusion 107 abuts against the fireproof insulating member 103, so that a hollow pressure release channel 108 can be formed between the fireproof insulating member 103 and the heat exchange plate 105, and since the protrusion 107 is located at two sides of the pressure release opening 106 along the third direction Y, the pressure release channel 108 is disposed corresponding to the pressure release opening 106, and at this time, the pressure release channel 108 is communicated with the pressure release opening 106, and it can be understood that the pressure release channel 108 is communicated with the outside of the battery assembly 101 in addition to the pressure release opening 106.

In this embodiment, the heat exchange plate 105 protrudes to form the protruding portions 107 located at two sides of the pressure release opening 106 along the third direction Y, and the protruding portions 107 are abutted with the fireproof insulating member 103, so that a pressure release channel 108 can be formed between the heat exchange plate 105 and the fireproof insulating member 103, the pressure release channel 108 is arranged corresponding to the pressure release opening 106, when the electric core in the battery assembly 101 is out of control, high-temperature flue gas and conductive melt discharged by the pressure release valve 104 need to be sprayed to the fireproof insulating member 103 again through the pressure release channel 108, in this process, part of the high-temperature flue gas and conductive melt stay in the pressure release channel 108 or are discharged through the pressure release channel 108, thereby buffering the impact of the high-temperature flue gas and conductive melt on the fireproof insulating member 103 to a certain extent, reducing the damage of the high-temperature flue gas and conductive melt on the fireproof insulating member 103, and guaranteeing the protection effect of the fireproof insulating member 103 on the conductive member 102.

It will be appreciated that under the impact of the high temperature flue gas and the conductive melt discharged from the pressure release valve 104, the fireproof insulating member 103 will drive the conductive body to move along the second direction Z toward a direction away from the battery assembly 101, thereby increasing the volume of the pressure release channel 108, reducing the air pressure in the pressure release channel 108, and improving the buffering effect of the pressure release channel 108 on the high temperature flue gas and the conductive melt.

Alternatively, the number of the protrusions 107 may be two, and the two protrusions 107 may be located on both sides of the pressure relief opening 106 in the third direction Y, respectively, and at this time, the protrusions 107 may extend in the first direction X.

Alternatively, the number of the protrusions 107 may be plural, and the protrusions 107 are located on two sides of the pressure relief opening 106 along the third direction Y, where the protrusions 107 located on the same side of the pressure relief opening 106 are sequentially spaced along the first direction X.

Alternatively, the plurality of battery packs 101 in the battery module 10 may be sequentially disposed along the first direction X; and/or a plurality of battery packs 101 among the battery packs 101 may be sequentially disposed along the third direction Y.

Alternatively, the plurality of battery modules 101 in the battery module 10 may be divided into two parts, and the battery modules 101 of the second part may be disposed at one side of the battery modules 101 of the first part in the second direction Z; at this time, the first-portion battery packs 101 may be sequentially disposed in the first direction X, and/or the first-portion battery packs 101 may be sequentially disposed in the third direction Y; the second portions of the battery assemblies 101 may be disposed sequentially in the first direction X, and/or the second portions of the battery assemblies 101 may be disposed sequentially in the third direction Y.

With continued reference to fig. 5, according to an aspect of the present application, the heat exchange plate 105 includes a first sub-plate 109 and a second sub-plate 110, the first sub-plate 109 and the second sub-plate 110 are both formed with a pressure relief opening 106, the second sub-plate 110 is located at a side of the first sub-plate 109 facing the fireproof insulation 103, the second sub-plate 110 protrudes to form a protrusion 107, and a portion of the first sub-plate 109 and the second sub-plate 110 formed with the protrusion 107 encloses to form a heat exchange flow channel 111.

The first sub-board 109 and the second sub-board 110 may be connected by welding, for example, the fixed connection of the first sub-board 109 and the second sub-board 110 may be achieved by brazing, or the fixed connection of the first sub-board 109 and the second sub-board 110 may be achieved by means such as an adhesive, which is not particularly limited herein; the convex portion 107 on the second sub-board 110 may be formed by a blow-up process or may be formed by punching.

The second sub-board 110 is located at one side of the first sub-board 109 facing the fireproof insulating member 103, at this time, the first sub-board 109 and the battery assembly 101 are mutually attached, and the second sub-board 110 protrudes to form protruding portions 107 located at two sides of the pressure relief opening 106 along the third direction Y; it will be appreciated that the second sub-board 110 protrudes towards the fireproof insulating member 103 to form the protruding portion 107, and correspondingly, a concave portion corresponding to the protruding portion 107 is formed on a side of the second sub-board 110 facing away from the fireproof insulating member 103, at this time, when the first sub-board 109 is attached to the second sub-board 110, a hollow channel is formed around the position of the concave portion, and the channel is used as the heat exchange flow channel 111 of the heat exchange board 105, and during the processing of the heat exchange board 105, only the feature of the corresponding protruding portion 107 needs to be processed on the second sub-board 110, and the feature of the heat exchange flow channel 111 does not need to be processed again, so that the processing technology of the heat exchange board 105 can be simplified, and the processing efficiency can be improved.

According to an aspect of the present application, the battery module 10 further includes a connection gel through which the protrusion 107 is adhered to the fireproof insulation 103.

It can be appreciated that, since the battery module 10 is installed in a battery pack, and the battery pack is generally used as a power supply device of a new energy automobile and is assembled on the automobile, during the running process of the automobile, the fireproof insulation member 103 in the battery module 10 may be caused to shift, so that each pressure release valve 104 in the battery module 101 cannot be covered by the fireproof insulation member 103, at this time, when the thermal runaway occurs in the corresponding battery core of the uncovered pressure release valve 104, the high temperature smoke and the conductive melt sprayed by the pressure release valve 104 may cause the short circuit or arcing of the conductive member 102, which may cause the fire or even explosion of the battery pack to cause serious safety accidents.

Therefore, in the application, the connection colloid is arranged, so that the convex part 107 and the fireproof insulating part 103 are bonded through the connection colloid, and therefore, the fireproof insulating part 103 is prevented from being shifted in position in the running process of the automobile, each pressure release valve 104 in the battery assembly 101 can be covered by the fireproof insulating part 103, and the protection effect of the fireproof insulating part 103 on the conductive part 102 is ensured; meanwhile, when the electric core of the battery assembly 101 is in thermal runaway, the high-temperature smoke and the conductive melt discharged by the pressure release valve 104 impact the fireproof insulating part 103, the connection colloid is damaged, the fireproof insulating part 103 is disconnected with the convex part 107, at the moment, the fireproof insulating part 103 drives the conductive part 102 to move towards the side far away from the battery assembly 101 under the impact of the high-temperature smoke and the conductive melt, so that the volume of the pressure release channel 108 is increased, the air pressure in the pressure release channel 108 is reduced, and the impact of the high-temperature smoke and the conductive melt on the fireproof insulating part 103 is buffered.

With continued reference to fig. 1 and 4, according to an aspect of the present application, the battery module 10 further includes a buffer member 112, where the buffer member 112 is fixedly disposed on a side of the conductive member 102 facing away from the battery assembly 101.

The buffer member 112 has a certain elasticity, for example, the buffer member 112 may be silica gel, rubber, sponge, etc., preferably the buffer member 112 is flame-retardant foam to prevent the buffer member 112 from burning at high temperature; the number of the buffer members 112 may be one or more, and in practical applications, the number and the size of the buffer members 112 may be determined according to the number and the size of the conductive members 102, which is not limited herein.

It will be appreciated that when the battery cells in the battery assembly 101 are out of control, the high temperature flue gas and the conductive melt discharged from the corresponding pressure release valve 104 will impact the fireproof insulating member 103 and drive the fireproof insulating member 103 to move along the second direction Z towards the side away from the battery assembly 101, and during the movement, the conductive member 102 may collide with other surrounding structures or with the case 201 or the case cover 202 of the battery pack, thereby causing damage to the conductive member 102 and the impacted structure, and affecting the service life of the battery pack.

In this embodiment, the buffer member 112 is disposed on a side of the conductive member 102 facing away from the battery assembly 101, so as to buffer the impact between the conductive member 102 and other surrounding structures or the case 201 or the case cover 202 of the battery pack, thereby avoiding damage.

Alternatively, when the battery module 10 is mounted in the battery case 20, the battery assembly 101 may be assembled in the battery case 20 by compressing the buffer 112 due to the height restriction of the battery case 20 in the second direction Z.

Alternatively, the buffer member 112 may be fixedly connected to the conductive member 102 by a flame retardant glue.

According to one aspect of the present application, the outer periphery of the conductive member 102 is coated with an insulating layer.

The insulating layer may be a heat shrink sleeve, an insulating glue layer, or the insulating layer may be coated on the outer periphery of the conductive member 102 by a dip molding process, which is not specifically limited herein.

The insulating layer is arranged on the periphery of the conductive piece 102 in a coating manner, so that the protection effect on the conductive piece 102 can be further improved, high-temperature smoke exhausted by the pressure release valve 104 and conductive melt are prevented from directly spraying on the conductive piece 102, and therefore the situations of short circuit or arc discharge and the like of the conductive piece 102 are further prevented, and the battery pack is prevented from being ignited or even exploded.

Fig. 6 is a schematic structural view of a battery pack according to some embodiments of the present application.

As shown in fig. 6, on the other hand, the embodiment of the present application further provides a battery pack, including a battery box 20 and the battery module 10 as described in any one of the above, where the battery box 20 includes a box 201 and a box cover 202, and the box 201 and the box cover 202 enclose to form an accommodating space 203; the battery module 10 is received in the receiving space 203.

The number of the battery modules 10 located in the receiving space 203 may be one or more, and is not particularly limited herein; it is understood that, when the number of the battery modules 10 is plural, the plurality of battery modules 10 may be electrically connected to each other through the conductive member 102; the case 201 and the case cover 202 of the battery case 20 may be covered with each other, or may be connected by other connection structures, for example, the connection between the case 201 and the case cover 202 may be achieved by hinging, which is not particularly limited herein.

According to one aspect of the present application, the case cover 202 is located at the side of the battery module 10 where the pressure release valve 104 is provided, and the case cover 202 is a flame retardant insulating case cover 202.

The flame-retardant insulating cover 202 may be made of a flame-retardant insulating material with a certain rigidity, for example, the flame-retardant insulating cover 202 may be made of glass fiber or carbon fiber, and specifically may be formed by layering glass fiber or carbon fiber materials, however, the flame-retardant insulating cover 202 may be made of other flame-retardant insulating materials with a certain rigidity, which is not limited herein.

It can be understood that when the case cover 202 is located at the side of the battery module 10 where the pressure release valve 104 is located, if the battery cells in the battery module 10 are thermally out of control, the case cover 202 may melt, fire, etc. due to the impact of high temperature smoke and conductive melt, thereby affecting the structure outside the case cover 202 or passengers; meanwhile, when the battery cell is out of control, high-temperature smoke generated by the battery cell and conductive melt impact the fireproof insulating part 103, so that the fireproof insulating part 103 drives the conductive part 102 to move along the second direction Z towards one side far away from the battery assembly 101, namely, the fireproof insulating part 103 drives the conductive part 102 to move close to the case cover 202, the conductive part 102 at the moment possibly contacts with the case cover 202, if the case cover 202 is made of conductive materials, current on the conductive part 102 can be conducted to the outside of the battery pack, and the normal operation of the structure outside the battery pack and the personal safety of passengers are affected.

Therefore, the case cover 202 is set to be the flame-retardant insulating case cover 202 in this embodiment, even if the high-temperature smoke and the conductive melt generated by the thermal runaway of the battery cells impact the case cover 202, the case cover 202 will not melt and fire, and since the case cover 202 is the insulating case cover 202, the insulation between the battery module 10 and the outside of the battery pack can be ensured, the structure outside the battery case 20 and passengers are ensured not to be affected by the thermal runaway of the battery cells in the battery case 20, and the safety performance of the battery pack is improved.

The embodiment of the application provides a battery module 10 and a battery pack, wherein the battery module 10 comprises a plurality of battery assemblies 101, a conductive piece 102 and a fireproof insulating piece 103, each battery assembly 101 comprises a plurality of battery cores which are sequentially arranged along a first direction X, and a pressure release valve 104 is arranged on a shell of each battery core; the conductive member 102 is used for connecting a plurality of battery assemblies 101, and the conductive member 102 is positioned on one side of the battery assemblies 101 where the pressure relief valve 104 is arranged; the fireproof insulating piece 103 is arranged between the battery assembly 101 and the conductive piece 102, along the second direction Z, the projection of the pressure release valve 104 on the battery assembly 101 is positioned in the projection range of the fireproof insulating piece 103 on the battery assembly 101, and the first direction X is perpendicular to the second direction Z, so that when the electric core is out of control, high-temperature smoke and conductive melt sprayed by the pressure release valve 104 can be prevented from directly spraying the conductive piece 102 through the fireproof insulating piece 103, the conductive piece 102 is prevented from being short-circuited or arc-drawn and the like, and the battery pack is prevented from being ignited and exploded, and at the moment, compared with the prior art, the arrangement of the fireproof insulating piece 103 is simpler, a large amount of manpower and material resources are not required to be consumed, and the assembly efficiency of the battery pack can be effectively improved; and, when the fire-proof insulating member 103 blocks the direct injection of the high temperature smoke and the conductive melt, the fire-proof insulating member 103 can drive the conductive member 102 to move along the second direction Z toward a direction away from the battery assembly 101, so that the high temperature smoke and the conductive melt can be discharged from between the protective insulating member and the battery assembly 101, thereby avoiding the accumulation of the temperature in the battery assembly 101 and preventing the battery assembly 101 from firing or even exploding due to the high temperature.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.

Claims (10)

1. A battery module, comprising:

the battery assembly comprises a plurality of battery assemblies, each battery assembly comprises a plurality of battery cores which are sequentially arranged along a first direction, and each battery core is provided with a pressure release valve;

the conductive piece is used for connecting a plurality of battery assemblies and is positioned at one side of the battery assembly, on which the pressure release valve is arranged;

the fireproof insulating piece is arranged between the battery assembly and the conductive piece, and in the second direction, the projection of the pressure release valve on the battery assembly is positioned in the projection range of the fireproof insulating piece on the battery assembly;

wherein the first direction and the second direction are perpendicular to each other.

2. The battery module of claim 1, further comprising a flame retardant gel, wherein the conductive member is fixedly connected with the flame retardant insulating member through the flame retardant gel.

3. The battery module of claim 1, further comprising a heat exchange plate disposed between the battery assembly and the fireproof insulating member, wherein the heat exchange plate is attached to the battery assembly, and pressure release openings corresponding to the pressure release valves one by one are formed in the heat exchange plate.

4. The battery module according to claim 3, wherein the heat exchange plate protrudes to form protrusions located on both sides of the pressure relief opening along a third direction, the protrusions abutting against the fireproof insulating member to form a pressure relief passage between the heat exchange plate and the fireproof insulating member, the third direction intersecting the first direction.

5. The battery module according to claim 4, wherein the heat exchange plate comprises a first sub-plate and a second sub-plate, the first sub-plate and the second sub-plate are both formed with the pressure relief opening, the second sub-plate is located at one side of the first sub-plate facing the fireproof insulating member, the second sub-plate protrudes to form the protruding portion, and the first sub-plate and the second sub-plate form a heat exchange flow passage by surrounding a portion with the protruding portion.

6. The battery module according to claim 4, further comprising a connection gel, wherein the protrusion is adhered to the fireproof insulating member through the connection gel.

7. The battery module according to any one of claims 1 to 6, further comprising a buffer member fixedly disposed on a side of the conductive member facing away from the battery assembly.

8. The battery module according to any one of claims 1 to 6, wherein an insulating layer is provided around the outer periphery of the conductive member.

9. A battery pack, comprising:

the battery box comprises a box body and a box cover, and the box body and the box cover are enclosed to form an accommodating space;

the battery module according to any one of claims 1 to 8, which is accommodated in the accommodation space.

10. The battery pack according to claim 9, wherein the case cover is positioned on a side of the battery module where the pressure release valve is provided, and the case cover is a flame-retardant insulating case cover.

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