CN214099763U - Battery module - Google Patents

Abstract

The embodiment of the utility model provides a battery module. The utility model provides a battery module includes: the battery cell assembly comprises a plurality of battery cells which are stacked, and the tabs of the battery cells are positioned on the same side surface of the battery cell assembly; the heating plate is used for heating the electric core assembly; the insulating heat conduction pad is located between the heating plate and the electric core assembly, one side of the insulating heat conduction pad is in heat conduction contact with the heating plate, and the other side of the insulating heat conduction pad is in heat conduction contact with the lug of the electric core. The utility model provides a battery module utilizes insulating heat conduction pad to transmit the heat of hot plate to the utmost point ear of electric core, has reduced heat conduction aluminum plate's use, and then can save the expense of heat conduction aluminum plate die sinking.

Description

Battery module

Technical Field

The embodiment of the utility model provides a relate to lithium ion battery technique, especially relate to a battery module.

Background

The battery module is electric automobile's power source, and battery module inside is provided with a plurality of electric cores, and series-parallel connection each other between a plurality of electric cores. The battery module can normally work within a certain temperature range, and if the electric automobile runs in a low-temperature environment, the battery module needs to be heated by a heating device so as to normally work.

Among the prior art, battery module's heating device includes hot plate and a plurality of heat conduction aluminum plate that are parallel to each other, and heat conduction aluminum plate is close to the position bending 90 formation kink at edge, kink and hot plate laminating. The main part of heat conduction aluminum plate offsets with the side of electric core, and when the hot plate generated heat, the heat transmitted the inside electric core of battery module through heat conduction aluminum plate.

However, when the heat conductive aluminum plate is formed in the mold, in order to ensure that the bending angle of each heat conductive aluminum plate is 90 °, the mold opening cost is high.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a battery module to solve when shaping heat conduction aluminum plate in the mould, be 90 in order to guarantee every heat conduction aluminum plate's the angle of buckling, the cost of die sinking can very high problem.

An embodiment of the utility model provides a battery module, include:

the battery cell assembly comprises a plurality of battery cells which are arranged in a stacked mode, and the lugs of the battery cells are located on the same side face of the battery cell assembly;

the heating plate is used for heating the electric core assembly;

the insulating heat conduction pad is located the hot plate with between the electric core subassembly, one side of insulating heat conduction pad with hot plate heat conduction contact, the opposite side of insulating heat conduction pad with the utmost point ear heat conduction contact of electric core.

In an alternative implementation manner, the electric core assembly is provided with two rows of the lugs, and the arrangement direction of each row of the lugs is arranged along a first direction; the number of the insulating heat conduction pads is two, the insulating heat conduction pads are formed into long strips, the length direction of each insulating heat conduction pad is parallel to the first direction, one insulating heat conduction pad is arranged on each row of the lugs, and the lugs are in heat conduction contact with the insulating heat conduction pads; the first direction is a stacking direction of the battery cells. The technical personnel in the field can understand that, set up the quantity of insulating heat conduction pad to two and every insulating heat conduction pad respectively with every row of utmost point ear heat conduction contact of electric core subassembly, can reduce the volume of insulating heat conduction pad between electric core and the hot plate, the absorptive heat of insulating heat conduction pad reduces, reduces the calorific loss efficiency in the battery module heating process promptly.

In an alternative implementation manner, the number of the insulating heat conduction pads is multiple, and each insulating heat conduction pad is connected with one of the tabs respectively. The technical personnel in the field can understand that, set up the quantity of insulating heat conduction pad as a plurality of, reduce the volume of insulating heat conduction pad between electric core and the hot plate, the absorptive heat of insulating heat conduction pad reduces, reduces the calorific loss efficiency in the battery module heating process promptly.

In an alternative implementation, the thickness of the insulating and heat-conducting pad is 2-4 mm; and/or the presence of a gas in the gas,

the insulating heat conduction pad is a heat conduction silica gel pad. As can be understood by those skilled in the art, the thickness of the insulating heat conducting pad is set to be 2-4mm, so that the two sides of the insulating heat conducting pad can be stably connected with the heating plate and the electrode lugs of the battery cell respectively, and meanwhile, the excessive heat loss in the heating process of the battery module can be avoided. The heat-conducting silica gel pad has good compression performance, and can realize stable connection between the lug of the battery cell and the heating plate.

In an optional implementation manner, the heating plate includes a heat conduction insulation plate and a heating film, which are stacked, the heat conduction insulation plate is fixedly connected to the heating film, and the heat conduction insulation plate is located between the insulation heat conduction pad and the heating film. As can be understood by those skilled in the art, the provision of the heating plate including the heat conducting insulating plate and the heating film with the heat conducting insulating plate located between the insulating heat conducting pad and the heating film can further avoid the occurrence of short circuit between the positive electrode tab and the negative electrode tab of the same cell.

In an optional implementation manner, a first protruding portion is arranged at an end of the heating plate along the first direction, and the first protruding portion is provided with a first through hole for fixing a cable of the battery module. As can be understood by those skilled in the art, a first protrusion is provided at an end of the heating plate and the first protrusion is provided with a first through hole, and a cable of the battery module can pass through the first through hole so that the cable can be fixed using the first through hole.

In an optional implementation manner, the electric heating device further comprises a containing box, wherein an opening is formed in the top of the containing box, the electric core assembly is located inside the containing box, and the heating plate is fixedly connected with the top of the containing box. As can be understood by those skilled in the art, the electric core assembly and the heating plate can be fixed by providing the receiving box.

In an optional implementation manner, a buckle is arranged at the top of the accommodating box, and the heating plate is provided with a clamping groove corresponding to the buckle; and/or the presence of a gas in the gas,

the top of holding the case is provided with the draw-in groove, the hot plate be provided with the buckle that the draw-in groove corresponds. The technical personnel in the field can understand that the heating plate and the containing box are clamped in a matching mode of the clamping groove and the clamping buckle, so that the stability of connection between the heating plate and the containing box can be improved.

In an optional implementation manner, a second protruding portion is arranged on an outer side wall of the accommodating box, the second protruding portion is provided with a second through hole, and the second protruding portion and the second through hole are used for fixing the accommodating box;

the quantity of second bulge is a plurality of, and is a plurality of second bulge sets up along second direction interval, the second direction is battery module's direction of height just the second direction perpendicular to first direction. As can be understood by those skilled in the art, the accommodating case is provided with the second protrusion and the second protrusion is provided with the second through hole, and those skilled in the art can fix the battery module by fixing the second protrusion.

In an optional implementation manner, the bus bar further comprises a bus bar, wherein the bus bar is in a long strip shape, and the length direction of the bus bar is parallel to the first direction; the number of the bus bars is two, the two bus bars are arranged at intervals along a third direction, and the third direction is the width direction of the battery module;

the bus bar is used for being electrically connected with the electrode lugs on the same side of the electric core assembly;

the lug is positioned between the busbar and the insulating heat conducting pad, the bottom surface of the lug is electrically connected with the busbar, and the top surface of the lug is in heat conducting contact with the insulating heat conducting pad. As can be understood by those skilled in the art, the bus bar is used for connecting the tabs on the same side of the electric core assembly, so as to realize the electric connection among a plurality of electric cores, and meanwhile, the bus bar can support the electric core assembly.

As can be appreciated by those skilled in the art, the battery module of the present invention includes a core assembly, a heating plate and an insulating thermal pad. The electric core assembly comprises a plurality of electric cores which are arranged in a stacked mode, and the lugs of the electric cores are positioned on the same side face of the electric core assembly; the heating plate is used for heating the electric core assembly; the insulating heat conduction pad is located the hot plate with between the electric core subassembly, one side of insulating heat conduction pad with hot plate heat conduction contact, the opposite side of insulating heat conduction pad with the utmost point ear heat conduction contact of electric core. Therefore, the heat of the heating plate is transferred to the electrode lug of the battery cell by the insulating heat conducting pad so as to heat the battery cell. The use of heat-conducting aluminum plates is reduced, and the cost of opening the die is further saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of a conventional battery module;

fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

Description of reference numerals:

100-a battery module;

110-electric core;

120-heating plate;

121-a first projection;

122-a first via;

130-an insulating thermal pad;

140-a containment box;

141-a second projection;

142-a second via;

143-cover plate;

150-a busbar;

160-thermally conductive aluminum plate.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Fig. 1 is a schematic structural view of a conventional battery module. As shown in fig. 1, the conventional battery module 100 includes a heating plate 120, a heat conductive aluminum plate 160, and a plurality of battery cells 110. A plurality of battery cells 110 are stacked one on top of another, and the main body portion of the heat conductive aluminum plate 160 is attached to the side wall of the battery cell 110. Illustratively, the heat conductive aluminum plate 160 is bent at a position near the top end by 90 ° to form a bent portion at the top end of the heat conductive aluminum plate 160, and the bent portion is attached to the bottom surface of the heating plate 120. When battery module 100 is under low temperature environment, hot plate 120 generates heat, and heat transmits each inside electric core 110 of battery module 100 via heat conduction aluminum plate 160 to guarantee that battery module 100 can normally work under low temperature environment. However, use traditional bender to hardly guarantee that every heat conduction aluminum plate 160 can both buckle 90, in order to guarantee that every heat conduction aluminum plate 160's angle of buckling homoenergetic meets the requirements, battery module 100 is at the in-process of production, and heat conduction aluminum plate 160 shaping in the mould, when producing the battery module 100 of different models, heat conduction aluminum plate 160 all needs the die sinking alone, and the cost of die sinking is higher.

After repeated thinking and verification, the inventor finds that if other parts can be used to replace the heat-conducting aluminum plate, the heat generated by the heating plate is directly transferred to the pole ear of the battery cell, and the heat is transferred to the interior of the battery cell through the pole ear of the battery cell. Like this, can reduce heat conduction aluminum plate's use, not only reduce the spare part cost of battery module, avoid the expense of heat conduction aluminum plate die sinking simultaneously.

In view of the above, the present inventors have devised a battery module including a core assembly, a heating plate, and an insulating heat conductive pad. The electric core component comprises a plurality of electric cores which are stacked, and the pole lugs of the electric cores are positioned on the same side of the electric core component. The heating plate is used for heating the electric core component. The insulating heat conduction pad is located between the heating plate and the electric core assembly, one side of the insulating heat conduction pad is connected with the heating plate, and the other side of the insulating heat conduction pad is connected with the lug of the electric core. Like this, the battery module need not set up heat conduction aluminum plate and also can heat for inside electric core, and insulating heat conduction pad is compared in heat conduction aluminum plate cost lower, and has avoided the expense of heat conduction aluminum plate die sinking.

Example one

Fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the present invention. As shown in fig. 2, the battery module 100 provided in the present embodiment includes a core assembly. The electric core assembly comprises a plurality of electric cores which are stacked, it is easy to understand that the number of the electric cores in the electric core assembly is non-limiting, and the specific number of the electric cores can be set by a person skilled in the art according to actual needs.

The utmost point ear of electricity core is located same side of electricity core subassembly, and exemplarily, the utmost point ear of electricity core is located the top of electricity core, and the utmost point ear of electricity core is located the top surface of electricity core subassembly promptly. As can be understood by those skilled in the art, a battery cell is an electrical energy storage unit in the battery module 100, and a plurality of battery cells in the battery cell assembly are connected in series or in parallel. In a possible implementation mode, foam is arranged between two adjacent electric cores, so that the foam is easy to understand and can play a buffering role, namely, the foam between the two electric cores can be compressed when the electric cores expand.

Referring to fig. 2, the cell assembly is located inside the accommodating box 140, and the top of the accommodating box 140 is provided with an opening, i.e. the cells are put into the accommodating box 140 from the opening at the top of the accommodating box 140 during the assembling process. Fig. 2 shows that the top of the containing box 140 is provided with a cover plate 143, and the cover plate 143 is provided with a square hole, it is easy to understand that after the battery cell assembly is placed inside the containing box 140, the cover plate 143 is covered on the top of the battery cell assembly, and the tab of the battery cell extends out of the square hole of the cover plate 143. Illustratively, the cover plate 143 is fixedly connected to the inner wall of the accommodating box 140, for example, the cover plate 143 may be fixedly connected to the inner wall of the accommodating box 140 by clipping. As can be understood by those skilled in the art, a cover plate 143 is disposed on the top of the cell assembly, and the cover plate 143 can support and fix the cell assembly.

The outer side wall of the accommodating box 140 is provided with a second protrusion 141, and the second protrusion 141 is exemplarily located on the side of the accommodating box 140 in the positive direction of the X-axis. Here, in fig. 2, the X-axis direction is a first direction which is a lamination direction of the battery cells, the Z-axis direction is a second direction which is a height direction of the battery module, and the Y-axis direction is a third direction which is a width direction of the battery module. The second protrusion 141 is provided with the second through holes 142, and it is easily understood that the number of the second through holes 142 on the second protrusion 141 is also non-limiting, and may be one or two, and those skilled in the art can set the number according to actual needs.

Illustratively, the shape of the second protrusion 141 is a semicircle, and the number of the second protrusions 141 is plural, and the plural second protrusions 141 are arranged at intervals along the second direction Z-axis direction. One possible implementation is that the second protrusion 141 may be formed as one piece with the accommodating case 140.

It can be understood by those skilled in the art that the second protrusion 141 is provided at the outer sidewall of the receiving case 140 and the second protrusion 141 is provided with the second through hole 142, and the second protrusion 141 and the second through hole 142 are used to fix the receiving case 140, i.e., the battery module 100 can be further fixed by fixing the second protrusion 141 during the assembly of the battery module 100. For example, after the battery module 100 is placed in the battery pack case, a screw is used to pass through the second through hole 142 of the second protrusion 141 and the battery pack case, thereby assembling the battery module 100.

Fig. 2 shows that the top of the cover plate 143 is provided with a bus bar 150, and exemplarily, the bus bar 150 has a long bar-shaped structure and the length direction of the bus bar 150 is arranged parallel to the X-axis direction in fig. 2, i.e., the first direction. It is worth mentioning that the length of the bus bar 150 is set according to the size of the cell assembly to ensure that the bus bar 150 can be electrically connected with the tab of each cell in the cell assembly. Illustratively, the number of the bus bars 150 is two, and the two bus bars 150 are arranged at intervals in the third direction, i.e., the Y-axis direction in fig. 2. The bus bar 150 is used to electrically connect with the tab on the same side of the battery cell 110, and one possible implementation manner is that the bottom surface of the tab is welded to the top surface of the bus bar 150.

As can be understood by those skilled in the art, the number of the bus bars 150 is two and the bus bars 150 are used for connecting the tabs on the same side of the electric core assembly, so as to realize series connection or parallel connection among a plurality of electric cores in the electric core assembly. Meanwhile, the bus bar 150 can support the cell assembly.

With continued reference to fig. 2, the battery module 100 of the present embodiment further includes a heating plate 120 and an insulating thermal pad 130, the heating plate 120 may heat the electric core assembly, and the insulating thermal pad 130 is located between the heating plate 120 and the tab of the electric core assembly. Illustratively, a tab is positioned between the buss bar 150 and the insulating thermal pad 130, with a bottom surface of the tab electrically connected to the buss bar 150 and a top surface of the tab in thermally conductive contact with the insulating thermal pad 130. It is easy to understand that the insulating thermal pad 130 has dual properties of insulation and thermal conduction, that is, when the heating plate 120 generates heat, the heat can be transferred to the tab of the battery cell via the insulating thermal pad 130, so as to heat the battery cell. Meanwhile, the insulating heat conducting pad 130 is arranged between the tab and the heating plate 120, so that the tab of the battery cell is prevented from being directly electrically connected with the heating plate 120 to cause contact short circuit.

Referring to fig. 1-2, in the prior art, the volume of the heat conductive aluminum plate 160 is large, and in the process that heat is transferred to the battery cell 110 via the heat conductive aluminum plate 160, the heat absorbed by the heat conductive aluminum plate 160 is large, so that the heat loss rate is high in the process of heat transfer. In the battery module 100 provided in this embodiment, the volume of the insulating thermal pad 130 is smaller than that of the thermal conductive aluminum plate 160, so that the amount of heat absorbed by the insulating thermal pad 130 itself is smaller in the heat transfer process, i.e., the heat loss rate is lower than that in the prior art, and the battery module 100 is more energy-saving in the heating process.

It should be noted that the battery cell 110 assembly has two rows of tabs, and the arrangement direction of each row of tabs is set along a first direction, i.e., the X-axis direction in fig. 2. It is easy to understand that two rows of tabs are arranged at intervals along the Y-axis direction in fig. 2, and a person skilled in the art may set the interval between two rows of tabs according to actual needs, and the embodiment is not limited herein. One possible implementation manner is that the insulating thermal pad 130 has a strip-shaped structure and the number of the insulating thermal pads 130 is two, and the length direction of the insulating thermal pad 130 is parallel to the X axis in fig. 2. Each row of the tabs is provided with an insulating heat conducting pad 130, and the tabs are in heat conducting contact with the insulating heat conducting pads 130, illustratively, the insulating heat conducting pads 130 cover the tabs and the bottom surfaces of the insulating heat conducting pads 130 are in close contact with the tabs. The present embodiment is not limited to the size of the insulating thermal pad 130, so long as the insulating thermal pad 130 can transfer the heat of the heating plate 120 to each tab under the insulating thermal pad 130.

In another possible implementation, the number of the insulating thermal pad 130 is plural, and each insulating thermal pad 130 is connected to one tab. That is, the insulating thermal pads 130 correspond to the tabs of the core assembly one to one. The sectional shape of the insulating thermal pad 130 is not limited in this embodiment, and those skilled in the art can set the sectional shape of the insulating thermal pad 130 to any suitable shape such as a square or a circle according to actual needs.

As can be appreciated by those skilled in the art, compared to connecting the tabs of a plurality of cell assemblies by using one insulating thermal pad 130, the number of the insulating thermal pads 130 is two, one insulating thermal pad 130 is disposed on each row of tabs of the cell 110 assembly, and the insulating thermal pads 130 are in thermal contact with the tabs. The volume of the insulating heat conduction pad 130 between the battery core and the heating plate 120 can be reduced, and then the heat absorbed by the insulating heat conduction pad 130 itself in the heat transfer process is reduced, and further the heat loss efficiency in the heating process of the battery module 100 is reduced. Further, the number of the insulating heat conducting pads 130 is set to be a plurality of, and the insulating heat conducting pads 130 correspond to the electrode lugs of the battery pack assembly one to one, so that the volume of the insulating heat conducting pads 130 between the battery cells and the heating plate 120 is further reduced, and further the heat loss efficiency in the heating process of the battery module 100 is reduced.

It should be mentioned that the insulating thermal pad 130 is located between the electric core assembly and the heating plate 120, after the relative positions of the electric core assembly and the heating plate 120 are fixed, the electrode tabs of the electric core assembly and the heating plate 120 extrude the insulating thermal pad 130 to make the insulating thermal pad 130 elastically deform, and the elastic force of the insulating thermal pad 130 is utilized to make the insulating thermal pad 130 stably connect with the heating plate 120 and the electrode tabs so that the two sides of the insulating thermal pad 130 are in thermal contact with the heating plate 120 and the electrode tabs respectively. Further, the thickness of the insulating thermal pad 130 is 2-4mm, and a person skilled in the art can set the specific thickness of the insulating thermal pad 130 according to actual needs, and the embodiment is not limited herein.

As can be understood by those skilled in the art, when the thickness of the insulating thermal pad 130 is less than 2mm, a gap is easily formed between the tab and the heating plate 120 of the insulating thermal pad 130, and it is not possible to ensure that two sides of the insulating thermal pad 130 are stably connected to the heating plate 120 and the tab of the battery cell, respectively; when the thickness of the insulating heat conduction pad 130 exceeds 4mm, the volume of the insulating heat conduction pad 130 is large, and in the heat transfer process, the amount of heat absorbed by the insulating heat conduction pad 130 is large, so that the heat loss efficiency in the heating process of the battery module 100 is increased.

Illustratively, a thermally conductive silicone pad may be used as the insulating thermally conductive pad 130. As can be understood by those skilled in the art, the thermal conductive silicone pad has good compression performance, so that the stable connection between the tab of the cell and the heating plate 120 can be realized.

In one possible implementation manner, the heating plate 120 includes a heat conducting insulating plate and a heating film, which are stacked and fixedly connected to each other, and exemplarily, the heat conducting insulating plate and the heating film may be directly connected by bonding. It is worth mentioning that the heating film is integrated with a heating wire or a heating strip, that is, the heating film can convert electric energy into heat energy under the condition of power-on, the heating power is related to the input current, and the self heating limit can be set according to the use requirement. The heat conductive and insulating plate has insulating properties, and for example, an epoxy plate may be used as the heat conductive and insulating plate.

Battery module 100 is after the assembly, and the heat conduction insulation board is located between insulating heat conduction pad 130 and the heating film, and the technical personnel in the art can understand is that, set up hot plate 120 including heat conduction insulation board and heating film, and the heat conduction insulation board is towards the electric core of battery module 100, and the electric connection takes place the contact short circuit between the positive ear of further avoiding same electric core and the negative pole ear, improves battery module 100's security.

In a possible implementation manner, the end of the heating plate 120 in the first direction, i.e., the positive direction of the X-axis, is provided with a first protrusion 121, and the first protrusion 121 is exemplarily square in shape, and a person skilled in the art can form the first protrusion 121 and the heating plate 120 into a single piece through a one-step molding process. Fig. 2 shows that the first protrusion 121 is provided with the first through hole 122, and the size and the position of the first through hole 122 are not limited in the present embodiment, for example, the first through hole 122 may be provided at a position close to the edge of the first protrusion 121.

In one possible implementation, the heating plate 120 may be fixedly coupled to the top of the accommodating case 140, and the first protrusion 121 protrudes from the sidewall of the accommodating case 140 after the heating plate 120 is fixedly coupled to the accommodating case 140. It can be understood by those skilled in the art that the first protrusion 121 is provided at the end of the heating plate 120 and the first protrusion 121 is provided with the first through hole 122, and the cables of the battery module 100 can be fixed using the first through hole 122, i.e., the cables of the battery module 100 can pass through the first through hole 122, so that the cables of the regular battery module 100 can be fixed using the first through hole 122.

Illustratively, the heating plate 120 may be coupled to the top of the receiving box 140 by means of bolts, bonding, or the like. For example, in an alternative implementation, the top of the accommodating box 140 is provided with a plurality of buckles, specifically, the buckles are located on the top of the inner wall of the accommodating box 140, and the plurality of buckles are arranged at intervals along the circumferential direction of the accommodating box 140. Correspondingly, the heating plate 120 is provided with a plurality of slots, which correspond to the fasteners of the accommodating boxes 140 one by one. When the clip of the accommodating box 140 is inserted into the clip groove of the heating plate 120, the heating plate 120 can be fixed.

Of course, in another alternative implementation manner, a clamping groove is provided on the top of the accommodating box 140, and a buckle corresponding to the clamping groove is provided on the heating plate 120. Alternatively, a person skilled in the art may also arrange the locking groove and the buckle at intervals on the top of the inner wall of the accommodating box 140, and correspondingly, the buckle matching with the locking groove of the accommodating box 140 and the locking groove matching with the buckle of the accommodating box 140 are arranged at intervals on the heating plate 120.

Those skilled in the art can understand that the heating plate 120 and the accommodating box 140 are clamped by the engaging means of the clamping groove and the buckle, so that the stability of connection between the heating plate 120 and the accommodating box 140 can be improved, and meanwhile, compared with other fixing means, the heating plate 120 is faster in the process of fixing with the accommodating box 140, thereby improving the assembly efficiency of the battery assembly.

In summary, in the battery module 100 provided in this embodiment, the tabs of the battery cell assembly are fixedly connected to the heating plate 120 through the insulating thermal pad 130. The electric core assembly is located inside the containing box 140, the heating plate 120 is fixedly connected with the top of the containing box 140, the heating plate 120 extrudes the insulating heat conducting pad 130 with the electrode lugs of the electric core assembly, so that the two sides of the insulating heat conducting pad 130 are respectively connected with the electrode lugs of the heating plate 120 and the electric core assembly. When the heating plate 120 generates heat, the heat is transferred to the tabs of the cells via the insulating thermal pad 130 to heat the cells. Compared with the existing battery module 100 in fig. 1, the battery core can be heated without arranging the heat-conducting aluminum plate 160, so that the die sinking and burr control costs of the heat-conducting aluminum plate 160 are saved. On the other hand, the volume of the insulating thermal pad 130 is smaller than that of the thermal aluminum plate 160, and the loss during the heat transfer is reduced. Simultaneously, use heat conduction aluminum plate 160 to transmit the heat to electric core among the prior art, heat conduction aluminum plate 160 can only laminate with one side of electric core side, the opposite side of electric core needs to set up the bubble cotton that plays the cushioning effect, and then causes the both sides side of electric core to be heated unevenly, and the battery module 100 that this embodiment provided, the heat that hot plate 120 produced directly transmits the utmost point ear of electric core via insulating heat conduction pad 130, transmit the inside of electric core by the utmost point ear of electric core again, the electric core is heated comparatively evenly.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention 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 and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (9)

1. A battery module, comprising:

the battery cell assembly comprises a plurality of battery cells which are arranged in a stacked mode, and the lugs of the battery cells are located on the same side face of the battery cell assembly;

the heating plate is used for heating the electric core assembly;

the insulating heat conduction pad is positioned between the heating plate and the electric core assembly, one side of the insulating heat conduction pad is in heat conduction contact with the heating plate, and the other side of the insulating heat conduction pad is in heat conduction contact with a lug of the electric core;

the hot plate is including heat conduction insulation board and the heating film of range upon range of setting, the heat conduction insulation board with heating film fixed connection, the heat conduction insulation board is located insulating heat conduction pad with between the heating film.

2. The battery module according to claim 1, wherein the core assembly has two rows of the tabs, each row of the tabs being arranged in a first direction; the number of the insulating heat conduction pads is two, the insulating heat conduction pads are formed into long strips, the length direction of each insulating heat conduction pad is parallel to the first direction, one insulating heat conduction pad is arranged on each row of the lugs, and the lugs are in heat conduction contact with the insulating heat conduction pads; the first direction is a stacking direction of the battery cells.

3. The battery module according to claim 1, wherein the number of the insulating thermal pads is plural, and each of the insulating thermal pads is connected to one of the tabs.

4. The battery module according to any one of claims 1 to 3, wherein the insulating thermal pad has a thickness of 2 to 4 mm; and/or the presence of a gas in the gas,

the insulating heat conduction pad is a heat conduction silica gel pad.

5. The battery module according to any one of claims 1 to 3, wherein an end of the heating plate in the first direction is provided with a first protrusion provided with a first through-hole for fixing a cable of the battery module.

6. The battery module according to any one of claims 1 to 3, further comprising a receiving box, wherein an opening is formed at the top of the receiving box, the electric core assembly is positioned inside the receiving box, and the heating plate is fixedly connected with the top of the receiving box.

7. The battery module according to claim 6, wherein a buckle is arranged at the top of the accommodating box, and the heating plate is provided with a clamping groove corresponding to the buckle; and/or the presence of a gas in the gas,

the top of holding the case is provided with the draw-in groove, the hot plate be provided with the buckle that the draw-in groove corresponds.

8. The battery module according to claim 6, wherein the outer side wall of the accommodating box is provided with a second protrusion, the second protrusion is provided with a second through hole, and the second protrusion and the second through hole are used for fixing the accommodating box;

the quantity of second bulge is a plurality of, and is a plurality of second bulge sets up along second direction interval, the second direction is battery module's direction of height just the second direction perpendicular to first direction.

9. The battery module according to any one of claims 1 to 3, further comprising a bus bar, wherein the bus bar is elongated, and the length direction of the bus bar is parallel to the first direction; the number of the bus bars is two, the two bus bars are arranged at intervals along a third direction, and the third direction is the width direction of the battery module;

the bus bar is used for being electrically connected with the electrode lugs on the same side of the electric core assembly;

the lug is positioned between the busbar and the insulating heat conducting pad, the bottom surface of the lug is electrically connected with the busbar, and the top surface of the lug is in heat conducting contact with the insulating heat conducting pad.

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