CN219626708U

CN219626708U - Sodium ion battery

Info

Publication number: CN219626708U
Application number: CN202320839431.1U
Authority: CN
Inventors: 黄丹; 汪浩
Original assignee: Liuzhou Huating New Energy Technology Co ltd
Current assignee: Liuzhou Huating New Energy Technology Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-09-01
Anticipated expiration: 2033-04-14

Abstract

The utility model provides a sodium ion battery, which comprises a battery cell, an upper shell, a lower shell, a heat conducting film and a heat insulating plate, wherein the battery cell is vertically arranged, the upper shell is arranged at the top of the battery cell, the lower shell is arranged at the bottom of the battery cell, the heat insulating plate is arranged at the bottom of the lower shell, the heat conducting film is arranged between the heat insulating plate and the lower shell, and a heating plate is arranged on the heat conducting film; a plurality of through holes are formed in the lower shell at intervals, each through hole is opposite to one unit of the battery cell, and each unit of the battery cell is contacted with the heat conducting film through the through hole; the lower shell is also provided with a plurality of through holes at intervals, and the through holes are arranged at intervals; the battery cell is characterized in that a plurality of heat conducting pins are arranged on the heat conducting film at intervals, one end of each heat conducting pin is connected with the heat conducting film, and the other end of each heat conducting pin penetrates through the lower shell through a through hole and extends to the inside of the battery cell and is positioned in a gap between units of the battery cell. The sodium ion battery can rapidly heat and dissipate heat of the whole battery core, and improves the working efficiency of the battery.

Description

Sodium ion battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a sodium ion battery.

Background

The lithium battery is commonly applied to automobiles, but the lithium iron phosphate has high cost, and the popularization of the lithium battery of the automobiles increases the difficulty. At present, the sodium ion battery is applied to automobiles, the battery core is transversely arranged, the heating film is arranged on the side face of the battery core, the battery core can be heated at low temperature, but the battery core is transversely arranged, and the heating film has the defects of uneven heating and slow temperature rise when the battery core is heated on the side face, so that the use efficiency of the battery core is low.

Based on this, chinese patent of publication No. CN212695263U proposes a battery module structure, which places the battery cell vertically, and sets a heating film at the bottom of the battery cell, because the divergence of temperature rise is the principle of upward divergence, the heating film at the bottom can heat the whole battery cell fast, so that the battery cell can absorb heat well, the energy density of the battery cell can reach the requirement, and the working efficiency is improved. However, because the heating film is directly contacted with the bottom of the battery cell, the whole heating film is heated, the power consumption is high, the heat preservation effect of the mode is poor, and when the temperature of the battery cell is too high, the battery film group cannot be rapidly cooled.

The battery package and the sodium ion battery disclosed in the chinese patent publication No. CN115084713B can equalize the heat radiation of each cell by separating the upper and lower metal foils from the cell, but the heat transfer mode is also to transfer heat from the end of the cell, the heat transfer speed is slow, and the temperature problem between the cells of the cell is not considered, so that the heat radiation of the whole cell is not very balanced, and meanwhile, when the temperature of the cell is too high, the temperature of the space between the cells cannot be rapidly reduced.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a sodium ion battery that is capable of rapidly heating and dissipating heat from the entire cell, and improving the operating efficiency of the battery.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the sodium ion battery comprises a battery cell, an upper shell, a lower shell, a heat conducting film and a heat insulating plate, wherein the battery cell is vertically arranged, the upper shell is arranged at the top of the battery cell, the lower shell is arranged at the bottom of the battery cell, the heat insulating plate is arranged at the bottom of the lower shell, the heat conducting film is arranged between the heat insulating plate and the lower shell, and a heating plate is arranged on the heat conducting film; a plurality of through holes are formed in the lower shell at intervals, each through hole is opposite to one unit of the battery cell, and each unit of the battery cell is contacted with the heat conducting film through the through hole; the lower shell is also provided with a plurality of through holes at intervals, and the through holes are arranged at intervals; the battery cell is characterized in that a plurality of heat conducting pins are arranged on the heat conducting film at intervals, one end of each heat conducting pin is connected with the heat conducting film, and the other end of each heat conducting pin penetrates through the lower shell through a through hole and extends to the inside of the battery cell and is positioned in a gap between units of the battery cell.

Preferably, a plurality of upper connecting rods are arranged on the upper shell at intervals, a plurality of lower connecting rods are arranged on the lower shell at intervals, each lower connecting rod is matched with an upper connecting rod, the upper shell and the lower shell are connected in a mutually clamping manner when both the upper shell and the lower shell are arranged on the battery cell, and form a middle reinforcing rib rod, and the middle reinforcing rib rod is arranged at intervals with through holes and through openings, penetrates through the battery cell and is positioned in a gap between units of the battery cell.

Preferably, four sides of the battery cell are provided with side shells, each side shell is connected with the upper shell and the lower shell, and each side shell is made of a heat conducting material.

Preferably, the wire connection end of the heating plate extends from the side of the lower case.

Preferably, the heat-insulating board is made of heat-insulating foam.

Preferably, the heat conducting pin is detachably mounted on the heat conducting film.

Preferably, one end of the heat conducting needle connected with the heat conducting film is provided with an external thread structure, the heat conducting film is provided with a connecting seat, the connecting seat is made of a heat conducting material and is provided with a threaded hole, and the heat conducting needle is connected with the connecting seat through the threaded hole of the external thread structure.

Preferably, the heat conducting needle is nail-shaped, a clamping groove is formed in the heat conducting film, a notch of the clamping groove is a bayonet through which a heat conducting needle head passes, the notch faces the side face of the battery cell, a notch through which a heat conducting needle body passes is formed in the top face of the clamping groove, and the notch is communicated with the bayonet.

Preferably, the top surface of the upper case is also provided with a heat conductive film.

Preferably, a heat conducting needle is also arranged on the heat conducting film at the upper shell, and penetrates through the upper shell and extends to the inside of the battery cell.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the heat conducting film with a heating function is additionally arranged on the lower shell, so that heat transfer between each unit of the battery core and the heat conducting film is realized, rapid heating can be realized when heating is required at low temperature, and the heat conducting needle arranged on the heat conducting film can rapidly transfer heat to the space between the battery core units, so that rapid heating can be realized by matching with heat transfer between each unit of the battery core, and the internal heat and the external heat can be rapidly balanced; in addition, when the temperature inside the battery cell is too high, the heat conducting needle can also transfer heat to the heat conducting film, so that quick heat dissipation is realized.

2. According to the utility model, the heat-conducting film is provided with the heat-insulating plate, so that the heat insulation effect of the heat-insulating plate can be utilized to insulate the battery cell.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a cross-sectional view of the present utility model;

FIG. 4 is a schematic view of the structure at the lower shell of the present utility model;

fig. 5 is a schematic structural view of the heat conductive film of the present utility model.

Description of the main reference signs

In the figure: the battery cell 1, the upper shell 2, the lower shell 3, the heat conducting film 4, the heat insulation board 5, the side shell 6, the heat conducting needle 7, the upper connecting rod 8, the lower connecting rod 9 and the through hole 10.

The utility model will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1-5, in a preferred embodiment of the present utility model, a sodium ion battery comprises a battery core 1, an upper case 2, a lower case 3, a heat conducting film 4 and a heat insulation board 5, wherein the battery core 1 is vertically arranged, the upper case 2 is installed at the top of the battery core, the lower case 3 is installed at the bottom of the battery core, the heat insulation board 5 is arranged at the bottom of the lower case 3, the heat conducting film 4 is arranged between the heat insulation board 5 and the lower case 3, and a heating plate is arranged on the heat conducting film 4; a plurality of through holes 10 are formed in the lower shell 3 at intervals, each through hole 10 is opposite to one unit of the battery cell 1, and each unit of the battery cell 1 is in contact with the heat conducting film 4 through the through hole 10; a plurality of through holes are further formed in the lower shell 3 at intervals, and the through holes are arranged at intervals with the through holes 10; the heat conducting film 4 is provided with a plurality of heat conducting pins 7 at intervals, one end of each heat conducting pin 7 is connected with the heat conducting film 4, and the other end of each heat conducting pin penetrates through the lower shell 3 through a through hole and extends to the inside of the battery cell 1 and is positioned in a gap between units of the battery cell 1.

According to the utility model, the battery cell 1 is vertically arranged, and the bottom of the battery cell 1 is provided with the heated heat conducting film 4 so as to heat the battery cell 1 at low temperature, so that the uniformity of heating of the battery cell 1 can be well improved, the efficiency of the battery cell 1 is improved, and the battery cost is reduced; secondly, the heat conduction needles 7 arranged on the heat conduction film 4 can conduct heat transfer to the space formed between the units of the battery cell 1, so that heat exchange between the inside and the outside of the battery cell 1 is quickened, and the battery cell 1 is quickly and uniformly heated at low temperature and quickly dissipates heat at high temperature; in addition, the setting of heated board 5 can keep warm for electric core 1, also makes the heat utilization ratio after the heating plate heats high simultaneously, preferably, heated board 5 adopts the cotton preparation of heat preservation bubble.

In this embodiment, in order to improve the steadiness of battery installation, the interval is provided with a plurality of upper connecting rods 8 on the upper casing 2, the interval is provided with a plurality of lower connecting rods 9 on the inferior valve 3, and each lower connecting rod 9 matches with an upper connecting rod 8, and both are in mutual block connection and form middle stiffening rib pole when upper casing 2 and inferior valve 3 are all installed on electric core 1, middle stiffening rib pole and through-hole 10, the equal interval setting of opening, it wears to establish electric core 1, and is located in the clearance between the unit of electric core 1 and the unit. Further, the four sides of the battery cell 1 are provided with side shells 6, each side shell 6 is connected with the upper shell 2 and the lower shell 3, and each side shell 6 is made of a heat conducting material. To facilitate the placement of the heater plate wires, the wire connection ends of the heater plate preferably extend from the sides of the lower housing 3.

In this embodiment, the heat conducting pin 7 is detachably mounted on the heat conducting film 4, so that the heat conducting pin 7 can be detached. In the present utility model, there are the following detachable connection means:

in one mode, one end of the heat conducting needle 7 connected with the heat conducting film 4 is provided with an external thread structure, the heat conducting film 4 is provided with a connecting seat, the connecting seat is made of a heat conducting material and is provided with a threaded hole, and the heat conducting needle 7 is connected with the connecting seat through the threaded hole of the external thread structure.

In a second mode, the heat conducting needle 7 is nail-shaped, the heat conducting film 4 is provided with a clamping groove, the notch of the clamping groove is a bayonet through which the nail head of the heat conducting needle 7 passes, the notch faces the side face of the battery cell 1, the top face of the clamping groove is provided with a notch through which the needle body of the heat conducting needle 7 passes, and the notch is communicated with the bayonet; the heat conducting pin 7 is arranged on the heat conducting film 4 in a way of inserting the pin head into the clamping groove, and the disassembly and assembly are simpler and more convenient. Preferably, the rigidity of draw-in groove top surface is little, can be extruded by inferior valve 3, then closely laminate with the pin head of heat conduction needle 7, the bottom of heat conduction needle 7 pin head is also hugged closely with heat conduction membrane 4 to improve the area of contact between heat conduction needle 7 and the heat conduction membrane 4, be convenient for heat conduction. The structural schematic of this approach is not specifically given.

Whatever the manner in which the detachable connection is achieved, the heat conducting pin 7 of the present utility model does not have electrical conductivity, and is used only as heat transfer. It is preferable that the heat conductive pins 7 be provided in any space between the cells in the cell 1.

Further, in another embodiment of the present utility model, the top surface of the upper case 2 is also provided with a heat conducting film 4, so as to facilitate rapid heat dissipation at high temperature. Further preferably, the heat conducting film 4 at the upper case 2 is also provided with a heat conducting pin 7, and the heat conducting pin 7 penetrates the upper case 2 and extends into the battery cell 1.

The foregoing description is directed to the preferred embodiments of the present utility model, but the embodiments are not intended to limit the scope of the utility model, and all equivalent changes or modifications made under the technical spirit of the present utility model should be construed to fall within the scope of the present utility model.

Claims

1. A sodium ion battery characterized by: the battery cell is vertically arranged, the top of the battery cell is provided with the upper shell, the bottom of the battery cell is provided with the lower shell, the bottom of the lower shell is provided with the heat insulation board, the heat conduction film is arranged between the heat insulation board and the lower shell, and the heat conduction film is provided with a heating plate; a plurality of through holes are formed in the lower shell at intervals, each through hole is opposite to one unit of the battery cell, and each unit of the battery cell is contacted with the heat conducting film through the through hole; the lower shell is also provided with a plurality of through holes at intervals, and the through holes are arranged at intervals; the battery cell is characterized in that a plurality of heat conducting pins are arranged on the heat conducting film at intervals, one end of each heat conducting pin is connected with the heat conducting film, and the other end of each heat conducting pin penetrates through the lower shell through a through hole and extends to the inside of the battery cell and is positioned in a gap between units of the battery cell.

2. A sodium ion battery as defined in claim 1, wherein: the battery cell is characterized in that a plurality of upper connecting rods are arranged on the upper shell at intervals, a plurality of lower connecting rods are arranged on the lower shell at intervals, each lower connecting rod is matched with an upper connecting rod, the upper shell and the lower shell are connected in a clamping mode when all installed on the battery cell, an intermediate reinforcing rib rod is formed, the intermediate reinforcing rib rod is arranged at intervals, through holes and through openings, the intermediate reinforcing rib rod penetrates through the battery cell, and the intermediate reinforcing rib rod is located in a gap between units of the battery cell.

3. A sodium ion battery as defined in claim 1, wherein: four sides of the battery cell are provided with side shells, each side shell is connected with the upper shell and the lower shell, and each side shell is made of a heat conducting material.

4. A sodium ion battery as defined in claim 1, wherein: the wire connection end of the heating plate extends from the side of the lower case.

5. A sodium ion battery as defined in claim 1, wherein: the heat-insulating board is made of heat-insulating foam.

6. A sodium ion battery as defined in claim 1, wherein: the heat conducting needle is detachably arranged on the heat conducting film.

7. A sodium ion battery as defined in claim 6, wherein: the one end that the heat conduction needle is connected the heat conduction membrane is provided with external screw thread structure, be provided with the connecting seat on the heat conduction membrane, the connecting seat adopts the heat conduction material preparation, and it has the screw hole, the heat conduction needle is connected with the connecting seat through the mode of external screw thread structure threaded connection screw hole.

8. A sodium ion battery as defined in claim 6, wherein: the heat conducting needle is nail-shaped, the heat conducting film is provided with a clamping groove, the notch of the clamping groove is a bayonet through which a heat conducting needle head passes, the notch faces the side face of the battery cell, the top face of the clamping groove is provided with a notch through which a heat conducting needle body passes, and the notch is communicated with the bayonet.

9. A sodium ion battery as defined in claim 1, wherein: the top surface of the upper shell is also provided with a heat conducting film.

10. A sodium ion battery as defined in claim 9, wherein: and a heat conducting needle is also arranged on the heat conducting film at the upper shell, penetrates through the upper shell and extends to the inside of the battery cell.