CN214505599U

CN214505599U - Battery module and battery pack

Info

Publication number: CN214505599U
Application number: CN202120479536.1U
Authority: CN
Inventors: 朱中槐
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-10-26
Anticipated expiration: 2031-03-05

Abstract

The utility model relates to a battery module and battery package, the battery module includes two end plates that set up along the first direction interval and two heating panels that set up along the second direction interval, the both ends of heating panel are connected fixedly through connecting plate and two end plates respectively, first direction is perpendicular with the second direction, form the mounting groove that is used for installing electric core between two end plates and two heating panels, the mounting groove internal lamination is provided with a plurality of electric cores, the heating panel includes relative first side and second side, first side is planar structure, first side is connected with electric core, the second side is provided with protruding structure, the intussuseption of protruding structure is filled with heat conduction working medium. Through setting up two end plates and two inflation boards, the second side of inflation board has protruding structure, packs heat conduction working medium in the protruding structure, realizes the temperature regulation to electric core. The blowing plate plays the roles of supporting, fixing and temperature adjusting simultaneously, is favorable for simplifying the overall structure of the battery module, and has the characteristics of simple structure and high temperature adjusting efficiency.

Description

Battery module and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery module and contain battery package of this battery module.

Background

The existing heat dissipation mode of the lithium ion battery module mainly comprises liquid cooling heat dissipation and air cooling heat dissipation. Liquid cooling heat dissipation relies on the liquid working medium (coolant) of the inside flow of liquid cooling board to take away the heat, and liquid working medium circulation flow between liquid cooling board and outside stock solution equipment causes corollary equipment more, and the overall structure of battery module and battery package is complicated, and then leads to the energy density of battery module to be low. The forced air cooling heat dissipation is mainly through setting up the fan in the battery box, makes the outside air of battery box circulate to the air outlet from the air intake, and the heat that is located the air duct middle part gathers easily, and the radiating effect is unsatisfactory, and the radiating effect of each position of battery module is different simultaneously, and the samming effect is poor, influences the battery life-span.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module and battery package, its simple structure, temperature regulation is efficient.

To achieve the purpose, the utility model adopts the following technical proposal:

the battery module comprises two end plates arranged at intervals along a first direction and two heating panels arranged at intervals along a second direction, wherein the two ends of each heating panel are fixedly connected with the end plates through connecting plates respectively, the first direction is perpendicular to the second direction and is two, the end plates and the two heating panels form a mounting groove used for mounting an electric core, a plurality of electric cores are stacked in the mounting groove and comprise a first side face and a second side face which are opposite, the first side face is of a planar structure and is connected with the electric cores, the second side face is provided with a protruding structure, and heat conducting working media are filled in the protruding structure.

Further, the heat dissipation plate is an inflation plate, and the inflation plate is manufactured through an inflation process.

Further, the inflation board is including range upon range of inner panel and the planking that sets up, the inner panel is close to the inside of mounting groove, the planking is close to the outside of mounting groove, protruding structure set up in on the planking, protruding structure with form between the inner panel and be used for holding heat conduction working medium hold the chamber.

Furthermore, a heat conducting pad is arranged between the blowing plate and the battery core, and heat is conducted between the blowing plate and the battery core through the heat conducting pad.

Furthermore, a plurality of radiating fins are arranged on the second side face at intervals, and at least part of the radiating fins are connected with the protruding structures.

Further, the length direction of the heat dissipation plate is parallel to the air flowing direction of one side of the heat dissipation plate, which is far away from the battery core.

Furthermore, the connecting plate comprises a first plate, a second plate and a third plate which are connected in sequence, the first plate is connected with the end plate, one end, away from the second plate, of the third plate is connected with the heat dissipation plate, and the first plate and the third plate are arranged at an included angle.

Furthermore, along a third direction, at least one end of the heat dissipation plate is vertically provided with a limiting plate, the third direction is perpendicular to the first direction, one side surface of each battery cell is provided with a pole, and one side surface, close to the pole, of each battery cell abuts against the limiting plate; and/or the like, and/or,

every the electricity core deviates from a side face of the pole is supported on the limiting plate.

Further, two adjacent electricity cores between the interval be provided with two at least silica gel pads.

Still provide a battery package, including foretell battery module and battery box, the battery module is a plurality of, and a plurality of battery modules are all installed in the battery box, adjacent two form the heat dissipation channel between the battery module and/or between the battery module with the lateral wall of battery box, so that the heating panel can with the heat exchange takes place for the air in the heat dissipation channel.

The utility model discloses compare in prior art's beneficial effect:

the utility model discloses a battery module and battery package through setting up two end plates and two heating panels, makes to enclose between end plate and the heating panel and establishes the mounting groove that forms and be used for installing electric core, and the second side of heating panel has protruding structure, and protruding structural intussuseption is filled with and leads hot working medium to make the heating panel carry out the heat exchange with electric core and outside air respectively, realize the temperature regulation to electric core. The heating panel plays the fixed effect with temperature regulation of support simultaneously, is favorable to simplifying the overall structure of battery module, has simple structure, and temperature regulation is efficient characteristics.

Drawings

Fig. 1 is a schematic view of a battery module according to an embodiment.

Fig. 2 is an exploded view of the battery module of the embodiment.

Fig. 3 is a schematic diagram of a heat dissipation plate according to an embodiment.

Fig. 4 is a schematic view of a heat dissipation plate according to another embodiment.

In the figure:

1. an end plate; 2. a heat dissipation plate; 20. a raised structure; 21. a first plate; 22. a second plate; 23. a third plate; 24. a limiting plate; 25. a heat sink; 3. an electric core; 4. a thermally conductive pad; 5. a silica gel pad; 6. an insulating plate; 7. a support; 8. and a terminal block.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

As shown in fig. 1 to 4, the utility model provides a pair of battery module, including two end plates 1, two heating panels 2 and a plurality of electric core 3, two end plates 1 set up along the first direction interval, and two heating panels 2 set up along the second direction interval, and first direction is perpendicular with the second direction, and first direction is the length direction (the Y direction of the drawing) of battery module promptly, and the second direction is the width direction (the X direction of the drawing) of battery module. The two ends of each heat dissipation plate 2 are respectively connected and fixed with the two end plates 1 through connecting plates, and a mounting groove for mounting the battery cell 3 is formed between the two end plates 1 and the two heat dissipation plates 2. A plurality of electric cores 3 are followed the range upon range of setting of first direction, and a plurality of electric cores 3 are installed in the mounting groove. The heat dissipation plate 2 includes opposite first and second sides, the first side faces the inside of the mounting groove, i.e., the first side forms a groove wall of the mounting groove, and the second side is located outside the battery module. The first side of heating panel 2 is planar structure, and first side is connected with electric core 3 in the mounting groove to the heat that makes battery 3 produce can be transmitted to heating panel 2 on. The second side surface is provided with a convex structure 20, and the convex structure 20 is filled with a heat conducting working medium. It can be understood that the heat dissipation plate 2 is used for mounting and fixing the battery cell and performing heat dissipation treatment. The heat dissipation plate 2 is made of an aluminum plate having a good heat conductivity. Preferably, the heat dissipation plate 2 is an inflation plate, and the inflation plate has the characteristics of light weight and easiness in processing. The heating panel 2 includes the interior plate and the planking of range upon range of setting, and the interior plate is close to the inside of mounting groove to make the interior plate can follow the interior electric core 3 of mounting groove and absorb the heat, the planking is close to the outside of mounting groove, so that heating panel 2 can be through the planking and the outside air contact of mounting groove, makes the planking take place the heat exchange with the outside air of mounting groove. The inner plate and the outer plate are manufactured and molded through a blowing process to form a blowing plate with the inner plate in a plane plate structure and the outer plate having a convex structure 20. An accommodating cavity for accommodating heat conducting working medium is formed between the convex structure 20 and the inner plate. The number of the protruding structures 20 is plural, the protruding structures 20 are distributed in a group or an array, and the accommodating cavities of the protruding structures 20 are sequentially communicated. The heat conducting medium has the function of absorbing heat conducted from the battery cell 3 to the heat sink 2. The heat conducting working medium can be a mixture of water and ethylene glycol, preferably, the heat conducting working medium in the embodiment is thermal phase change gel, and the thermal phase change gel has a heat storage function and can absorb heat or release heat in a thermal phase change process. In the battery module use, when 3 temperature risees of electricity core, 3 absorbed heat from electricity core of heat phase transition gel, realize the cooling heat dissipation to electricity core 3. When the temperature of the battery cell 3 is low, the thermal phase change gel can release heat to the battery cell 3, so that the battery cell 3 is heated, and the battery cell 3 is maintained in a proper temperature range. Inside heat conduction working medium filled protruding structure 20, protruding structure 20 can increase the contact surface of heating panel 2 and battery module outside air, and then improves the heat exchange efficiency of heating panel 2 and outside air to promote battery module to maintain in suitable temperature range.

Specifically, be provided with heat conduction pad 4 between inflation board and electric core 3, conduct heat through heat conduction pad 4 between inflation board and the electric core 3. In this embodiment, heat conduction pad 4 is made for heat conduction silica gel, and it has good viscidity, flexibility and compression performance, is favorable to discharging the air between electric core 3 and the inflation board, makes between electric core 3 and the inflation board through 4 full contacts of heat conduction pad, improves heat conduction efficiency.

Specifically, referring to fig. 4, a plurality of heat dissipation fins 25 are disposed at intervals on the second side surface, and at least a portion of the heat dissipation fins 25 are connected to the protruding structures 20. In the present embodiment, the heat radiation fins 25 are thin metal sheets having excellent heat conductivity, the plurality of heat radiation fins 25 are provided at intervals in the width direction of the heat radiation plate 2, the longitudinal direction of each heat radiation fin 25 is parallel to the longitudinal direction of the heat radiation plate 2, and the width direction of the heat radiation plate 2 is the illustrated Z direction. Due to the protruding structures 20 protruding from the second side, the protruding portions of the protruding structures 20 are embedded in the heat sink 25, and the protruding structures are used to contact the heat sink 25 with the protruding structures 20, so that the heat in the protruding structures 20 can be transferred to the heat sink 25. When the plurality of protruding structures 20 are arranged at intervals, there is a spacing region between two adjacent protruding structures, and in this case, among the plurality of heat dissipation fins 25, a part of the heat dissipation fins 25 is located in the spacing region, and another part of the heat dissipation fins 25 is connected to the protruding structures 20. When a plurality of the convex structures 20 are sequentially connected and disposed without a space region between two adjacent convex structures 20, all the heat dissipation fins 25 are connected to the convex structures 20. In this embodiment, at least a portion of the heat sink 25 is connected to the raised structure 20 so that heat on the raised structure 20 is directly conducted to the air through the heat sink 25. The heat radiating fins 25 are provided to further increase the contact area between the heat radiating plate 2 and the outside air, thereby improving the heat exchange performance.

In order to improve the heat exchange performance of the heat dissipation fins 25, the mounting direction of the heat dissipation fins 25 is matched with the flow direction of air outside the battery module. Specifically, the length direction of the heat sink 25 is parallel to the air flowing direction of the side of the heat sink 2 away from the electric core 3. It can be understood that the battery modules are cooled in an air cooling manner, a plurality of battery modules are mounted in the battery pack, a heat dissipation channel is formed between adjacent battery modules or between the battery modules and a battery box body of the battery pack, and air in the heat dissipation channel flows under the action of natural convection or under the action of a fan. In this embodiment, the air flowing direction of the side of the heat dissipation plate 2 departing from the electric core 3 is the air flowing direction in the heat dissipation channel. The structure can avoid the radiating fins 25 from forming large resistance to air flow, thereby ensuring the air circulation of the second side surface and improving the heat exchange efficiency.

Specifically, along first direction, the both ends of heating panel 2 all are provided with the connecting plate, and the both ends of heating panel 2 are connected fixedly through connecting plate and two end plates 1 respectively. The connecting plate is including the first board 21, second board 22 and the third board 23 that connect gradually, and first board 21 and end plate 1 welded fastening, and the one end that third board 23 deviates from second board 22 is connected with heating panel 2, and first board 21 and third board 23 are the contained angle setting. In this embodiment, the first plate 21 is perpendicular to the third plate 23. Because a plurality of electric cores 3 are installed in the installation groove, the periphery of the electric core 3 is abutted against the groove wall of the installation groove. This battery module is in the use, and the phenomenon of bulging can appear in electric core 3. When the battery cell 3 swells, a pressing force is formed on the end plate 1 or the heat dissipation plate 2. When the end plate 1 or the heat dissipation plate 2 is subjected to the pressing force, the pressing force can be released by deforming the second plate 22 located between the first plate 21 and the third plate 23, thereby preventing the safety accident of the battery cell 3 caused by the internal overpressure.

Specifically, along a third direction, at least one end of the heat dissipation plate 2 is vertically provided with a limiting plate 24, the third direction is vertical to the first direction, a side surface of each cell 3 is provided with a pole, and a side surface of each cell 3, which is close to the pole, abuts against the limiting plate 24; and/or one side surface of each battery cell 3 departing from the pole is abutted against the limiting plate 24. In the present embodiment, the third direction is the height direction (the Z direction shown in the figure) of the battery module. The top of electric core 3 is provided with positive post and negative pole post that is used for with external equipment electric connection, connects through terminal row 8 between the utmost point post of two adjacent electric cores 3 to realize a plurality of electric core 3's electric connection, so that the input or the output of electric energy. The top of the battery module is also provided with a bracket 7, and the bracket 7 is used for mounting various electronic devices and fixing lines. The upper and lower ends of the heat dissipation plate 2 are provided with limit plates 24, and the limit plates 24 are perpendicular to the heat dissipation plate 2. The limiting plate 24 is used for positioning the battery cell 3. When installing electric core 3, the one end that makes every electric core 3's top surface and bottom surface be close to heating panel 2 supports respectively and leans on two limiting plates 24 to a side coplane that makes a plurality of electric cores 3 have utmost point post, so that at the top installation terminal row 8 of a plurality of electric cores 3, be favorable to improving the assembly quality of assembly efficiency and improvement battery module.

Specifically, at least two silica gel pads 5 are arranged between two adjacent battery cells 3 at intervals. In this embodiment, be provided with two silica gel pads 5 between two adjacent electric cores 3, silica gel pad 5 has the extensibility, can make and release electric core 3's extrusion force when electric core 3 takes place to swell. Two silica gel pads 5 intervals set up to have the space that supplies silica gel pad 5 to extend between two adjacent electric core 3, when two adjacent electric core 3 extrusion each other, the extension of accessible silica gel pad 5 is out of shape and is released pressure. In this embodiment, the battery module further includes a silica gel pad 5 located at the bottom of the battery module and an insulating plate 6 disposed between the end plate 1 and the electric core 3. The bottom surfaces of a plurality of electric cores 3 are all bonded with the silica gel pad 5, and the silica gel pad 5 is used for protecting the electric cores 3, so that the abrasion of the bottom plate of the electric cores 3 and the contact surface of the battery box body when the battery module is installed in the battery box body is avoided. The insulating plate 6 is used for insulating and isolating the end plate 1 from the battery cell 3.

The remarkable effects of the embodiment are as follows: through setting up two end plates 1 and two heating panels 2, enclose between messenger's end plate 1 and the heating panel 2 and establish the mounting groove that forms and be used for installing electric core 3, the second side of heating panel 2 has protruding structure 20, and protruding structure 20 intussuseption is filled with heat-conducting medium to make heating panel 2 carry out the heat exchange with electric core 3 and outside air respectively, realize the temperature regulation to electric core 3. The heat dissipation plate 2 plays a role in supporting, fixing and temperature regulation at the same time, is beneficial to simplifying the overall structure of the battery module, and has the characteristics of simple structure and high temperature regulation efficiency.

Still provide a battery package, including foretell battery module and battery box, the battery module is a plurality of, and a plurality of battery modules are all installed in the battery box, form heat dissipation channel between two adjacent battery modules and/or between the lateral wall of battery module and battery box to make heating panel 2 can take place the heat exchange with the gas in the heat dissipation channel. It can be understood that the heat dissipation plates 2 are disposed at both sides of the battery module, and the battery module exchanges heat with the external air through the heat dissipation plates 2. When the battery modules are installed, the two adjacent battery modules are spaced to form a heat dissipation channel, or the battery modules and the side wall of the battery box body form the heat dissipation channel. In order to improve the heat dissipation performance, the battery box body is further provided with a fan, air in the heat dissipation channel is enabled to circulate in an accelerated mode through the fan, heat exchange between the heat dissipation plate 2 and external air is promoted, and the heat exchange efficiency of the battery pack is improved.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a battery module, its characterized in that includes two end plates that set up along the first direction interval and two heating panels that set up along the second direction interval, the both ends of heating panel are respectively through connecting plate and two the end plate is connected fixedly, the first direction with the second direction is perpendicular, two the end plate with two form the mounting groove that is used for installing electric core between the heating panel, the mounting groove internal lamination is provided with a plurality of electric cores, the heating panel includes relative first side and second side, first side is planar structure, first side with electric core connects, the second side is provided with protruding structure, protruding structure intussuseption is filled with heat conduction working medium.

2. The battery module according to claim 1, wherein the heat dissipation plate is an expansion plate, and the expansion plate is manufactured through an expansion process.

3. The battery module according to claim 2, wherein the blowing plate comprises an inner plate and an outer plate which are arranged in a stacked manner, the inner plate is adjacent to the inner portion of the mounting groove, the outer plate is adjacent to the outer portion of the mounting groove, the protruding structure is arranged on the outer plate, and an accommodating cavity for accommodating the heat-conducting working medium is formed between the protruding structure and the inner plate.

4. The battery module of claim 2, wherein a thermal pad is disposed between the expansion plate and the cell, and heat is conducted between the expansion plate and the cell through the thermal pad.

5. The battery module as set forth in claim 1, wherein a plurality of heat dissipation fins are provided at intervals on the second side surface, and at least a portion of the heat dissipation fins are connected to the protruding structure.

6. The battery module according to claim 5, wherein the length direction of the heat sink is parallel to the air flow direction of the side of the heat sink facing away from the battery cell.

7. The battery module according to claim 1, wherein the connecting plate comprises a first plate, a second plate and a third plate which are connected in sequence, the first plate is connected with the end plate, one end of the third plate, which is opposite to the second plate, is connected with the heat dissipation plate, and the first plate and the third plate are arranged at an included angle.

8. The battery module according to claim 1, wherein a limiting plate is vertically arranged at least at one end of the heat dissipation plate along a third direction, the third direction is perpendicular to the first direction, a pole is arranged on one side surface of each cell, and one side surface of each cell, which is close to the pole, abuts against the limiting plate; and/or the like, and/or,

9. The battery module according to claim 1, wherein at least two silicone gaskets are arranged between two adjacent battery cells at intervals.

10. A battery pack, comprising the battery module and the battery box of any one of claims 1 to 9, wherein the battery module is provided in plurality, the plurality of battery modules are all mounted in the battery box, and a heat dissipation channel is formed between two adjacent battery modules and/or between the battery module and the side wall of the battery box, so that the heat dissipation plate can exchange heat with air in the heat dissipation channel.