Insulation structure of sodium ion battery box

Abstract

The utility model provides an insulation structure of a sodium ion battery box, the battery box comprises a battery shell and a cover plate, the cover plate is connected above the battery shell, two battery modules and a protection plate are arranged in the battery shell, each battery module consists of a plurality of rows of battery cell groups, each battery cell group consists of a plurality of battery cells, a first insulation plate is arranged on each surface outside the battery module, and a second insulation plate is arranged on each surface outside the battery module. The plurality of first insulating plates form an insulating shell, so that the battery module is insulated; a protective plate is arranged on one side, close to the cover plate, outside the insulating shell, and a second insulating plate is arranged above the protective plate, so that the protective plate is insulated; a first filling block is arranged between the upper part of the second insulating plate and the battery shell, so that a gap between the second insulating plate and the battery shell is filled, and meanwhile, a buffering effect is achieved; a plurality of second filling blocks are further arranged on the two side edges of the protection plate, the second filling blocks are higher than the protection plate, the upper surfaces of the second filling blocks make contact with the second insulating plate, and the lower surfaces of the second filling blocks make contact with the epoxy shell.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, and more specifically to an insulation structure of a sodium ion battery box. Background Art

[0002] In recent years, with the development of smart grids, the degree of grid automation has been continuously improved. Many grid automation equipment has telemetry, telesignaling, and remote control functions. Most of these equipment are equipped with backup power supplies to ensure rapid fault handling during power outages. Taking the distribution network automation station terminal as an example, its main power supply is generally taken from the voltage transformer. When the main power supply is cut off, the backup power supply needs to meet the normal operation of the distribution network automation station terminal and the communication device for a period of time, and ensure that the switch is reliably opened and closed several times, and ensure that the fault information is reliably uploaded to the main station for fault judgment. At the same time, the fault is isolated to the smallest range before restoring regional power supply to shorten the power outage time.

[0003] The backup power supply of the terminal of the domestic distribution network automation station mainly adopts lead-acid battery or lithium-ion battery, especially sodium-ion battery. According to the records of the above background technology, there are frequent reports of fires in the domestic DTU lithium-ion battery backup power supply. The reason is that the sodium-ion battery is caused by the excessively high body temperature during operation. Therefore, how to avoid the short life of the battery due to the easy accumulation of heat in a high temperature environment and the easy occurrence of thermal runaway and fire, and then ensure the safety of battery use, is a technical problem that technical personnel in this field need to solve at present.

[0004] The utility model patent with the announcement number CN 220086168 U discloses a sodium ion battery, comprising a shell and a top cover mounted on the shell, the inner cavity of the shell is filled with a graphene heat-conducting filling layer, each embedded groove is plugged with a sodium ion battery, adjacent sodium ion batteries are connected in series in pairs through connecting sheets, and a plurality of sodium ion batteries are connected in series through the connecting sheets to form a sodium ion battery pack; heat-conducting components are detachably installed on the opposite side walls of the shell, and in the scheme, under the heat-conducting effect of the graphene heat-conducting filling layer, the heat generated by the sodium ion battery pack during operation can be timely diverted, so that each sodium ion battery can work at a reasonable temperature, and under the heat-conducting effect of the two groups of heat-conducting components, the heat in the graphene heat-conducting filling layer can be dissipated to the outside, thereby improving the safety of the sodium ion battery pack in the shell and avoiding fire caused by overheating.

[0005] However, the adjacent sodium-ion batteries in the above technical solution are connected in series through connecting plates, and their operating voltage is relatively small, which cannot meet the needs of fast charging and discharging. In addition to good thermal conductivity, graphene also has excellent electrical conductivity. Filling the entire battery cavity with a graphene thermal conductive filling layer has the risk of leakage and short circuit. Utility Model Content

[0006] In order to solve the above problems, the utility model proposes an insulation structure of a sodium ion battery box, which enhances the electrical insulation effect by arranging multiple layers of insulating plates, and has good heat resistance, so that the battery charging and discharging is safer; by arranging filling blocks between the gaps between the battery shell 10 and the insulating plates and between the insulating plates, partial pressure is buffered and the internal components of the battery are stabilized; by arranging a nickel strip 72, multiple battery cell groups 21 are connected in parallel to expand the rated capacity of the battery module 2, and multiple rows of battery cell groups 21 are connected in series by connecting the nickel strips 72 and the nickel strips 72, so that the working voltage of the battery module 2 is increased; by arranging a battery rack 22, gaps are separated between the battery cell groups 21, which is conducive to heat dissipation and not prone to short circuit.

[0007] An insulating structure of a sodium ion battery box, the battery box comprising a battery shell 10 and a cover plate 11, the cover plate 11 being connected to the top of the battery shell 10, two battery modules 2 and a protective plate 4 being arranged inside the battery shell 10, the battery module 2 being composed of multiple rows of battery core groups 21, the battery core group 21 being composed of multiple battery cores, the positive poles and negative poles of adjacent battery core groups 21 being not on the same surface, the number of rows of battery core groups 21 of each battery module 2 being an odd number, characterized in that: a first insulating plate 33 is arranged on each surface outside the battery module 2, a plurality of the first insulating plates 33 form an insulating shell 3, so that the battery module 2 is insulated; a protective plate 4 is arranged on the outside of the insulating shell 3 close to the cover plate 11, the A second insulating plate 5 is provided above the protection plate 4 to insulate the protection plate 4; a first filling block 61 is provided between the second insulating plate 5 and the battery shell 10 to fill the gap between the second insulating plate 5 and the battery shell 10. When the battery is inverted or placed on its side, the remaining components in the battery shell 10 are firmly positioned and do not collide with the cover plate 11, thereby playing a buffering role; a plurality of second filling blocks 62 are also provided on both sides of the protection plate 4, the height of the second filling being higher than the height of the protection plate 4, and the upper surface of the second filling block 62 is in contact with the second insulating plate 5, and the lower surface of the second filling block 62 is in contact with the epoxy shell 3, so as to play a buffering role so that the protection plate 4 is not directly subjected to force.

[0008] Furthermore, the first filling block 61 and the second filling block 62 are made of EVA foam with a density of 30 g / cm3.

[0009] Furthermore, the first insulating plate 33 and the second insulating plate 5 are made of epoxy material.

[0010] In some embodiments, a Bluetooth module 9 is further provided on the second insulating plate 5 for connecting to a smart device.

[0011] Furthermore, each battery module 2 is provided with multiple nickel strips 72 on the front and back surfaces, and the nickel strip 72 is composed of two sub-nickel strips, and the sub-nickel strip is composed of multiple nickel sheets, each nickel sheet corresponds to the positive electrode or negative electrode of a battery cell, and the adjacent nickel sheets of the same sub-nickel strip are connected by a nickel connector 73, and the one-to-one corresponding nickel sheets of the two sub-nickel strips of the same nickel strip 72 are connected by the nickel connector 73. At the same time, the nickel strips 72 connected to the positive and negative electrodes of the same group of battery cells 21 are staggered.

[0012] Furthermore, the nickel strip 72 is used to conduct current from the battery cell group 21, and the positive or negative electrodes of the battery cells of the same nickel strip 72 are connected in parallel through the corresponding sub-nickel strips, so that the capacity of the battery cell group 21 connected to the same nickel strip 72 is the sum of the capacities of all battery cell groups 21 on the nickel strip 72, and the positive electrode of one battery cell group 21 is connected in series with the negative electrode of another battery cell group 21 through the same nickel strip 72. At the same time, since the current of each battery cell flows from the negative electrode to the positive electrode, the current flows from the total negative electrode to the total positive electrode of the battery module 2 in an S-shaped process, so that the total voltage of the two battery modules 2 is the sum of the voltages of the battery cell groups 21 connected to each nickel strip 72.

[0013] Furthermore, a charge and discharge power supply 13 is provided on the outside of the cover plate 11, and the total positive electrode of the battery module 2 is connected to the positive electrode of the charge and discharge power supply 13 through the nickel strip 72, and the total negative electrode of the battery module 2 is connected to the negative electrode of the charge and discharge power supply 13 through the nickel strip 72 connecting wire passing through the protective plate 4.

[0014] Furthermore, a plurality of battery cell groups 21 are connected with a battery rack 22 to form a battery module 2. The battery rack 22 includes an upper battery rack 221 and a lower battery rack 222. The upper battery rack 221 is connected to the upper part of the battery cell, and the lower battery rack 222 is connected to the lower part of the battery cell. The battery rack 22 separates gaps between adjacent battery cells, thereby enhancing insulation and facilitating heat dissipation.

[0015] Furthermore, the battery rack 22 includes a plurality of connection units, the inner wall of the connection unit is in conformity with the shape of the battery cell, and the surface of the outer wall of the connection unit in contact with the first insulating plate 33 is a plane, which is convenient for connection with the first insulating plate 33 .

[0016] In some embodiments, the battery rack 22 is made of ABS+PC, and the outer surface of the battery cell is provided with a PVC film for insulation.

[0017] Furthermore, a handle 12 is provided on the outer side of the cover plate 11 , and the handle 12 is rotatably connected to the cover plate 11 .

[0018] The beneficial effects of the utility model are as follows: an insulating structure of a sodium ion battery box, which enhances the electrical insulation effect by arranging multiple layers of insulating plates, and has good heat resistance, so that the battery charging and discharging is safer; by arranging filling blocks between the gaps between the battery shell 10 and the insulating plates and between the insulating plates, partial pressure is buffered and the internal components of the battery are stabilized; by arranging a nickel strip 72, a plurality of battery cell groups 21 are connected in parallel to expand the rated capacity of the battery module 2, and by connecting the nickel strips 72 and the nickel strips 72, a plurality of rows of battery cell groups 21 are connected in series to increase the working voltage of the battery module 2; by arranging a battery rack 22, gaps are separated between the battery cell groups 21, which is conducive to heat dissipation and not prone to short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall structural diagram of the insulation structure of the sodium ion battery box of the present utility model.

[0020] Figure 2 The battery box structure diagram is a battery box structure of the insulation structure of the sodium ion battery box of the present utility model.

[0021] Figure 3 This is an overall structural diagram of a battery module with an insulation structure of a sodium ion battery box of the present invention.

[0022] Figure 4 This is a battery module monomer structure diagram of the insulation structure of the sodium ion battery box of the present utility model.

[0023] Figure 5 The battery rack structure diagram of the insulation structure of the sodium ion battery box of the utility model.

[0024] Figure 6 The figure is a schematic diagram of the nickel strip structure of the insulating structure of the sodium ion battery box of the present invention.

[0025] Main component symbols

[0026]

[0027]

[0028] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, it is the overall structure diagram of the insulation structure of the sodium ion battery box of the utility model; Figure 2 As shown, it is a battery box structure diagram of the insulation structure of the sodium ion battery box of the utility model; Figure 3 As shown, it is the overall structure diagram of the battery module of the insulation structure of the sodium ion battery box of the utility model; Figure 4As shown, it is a battery module monomer structure diagram of the insulation structure of the sodium ion battery box of the utility model; Figure 5 As shown, it is a battery rack structure diagram of the insulation structure of the sodium ion battery box of the utility model; Figure 6 The figure shows a schematic diagram of the nickel strip structure of the insulating structure of the sodium ion battery box of the present invention.

[0030] Embodiment 1:

[0031] An insulating structure of a sodium ion battery box, the battery box comprising a battery shell 10 and a cover plate 11, the cover plate 11 being connected above the battery shell 10, two battery modules 2 and a protective plate 4 being arranged inside the battery shell 10, the battery module 2 being composed of multiple rows of battery core groups 21, the battery core group 21 being composed of multiple battery cores, the positive poles and negative poles of adjacent battery core groups 21 being not on the same surface, the number of rows of battery core groups 21 of each battery module 2 being an odd number, characterized in that: a first insulating plate 33 is arranged on each surface outside the battery module 2, a plurality of the first insulating plates 33 form an insulating shell 3, so that the battery module 2 is insulated; a protective plate 4 is arranged on the outside of the insulating shell 3 close to the cover plate 11, a second insulating plate 5 is arranged above the protective plate 4, so that the protective plate 4 is insulated.

[0032] A first filling block 61 is provided between the second insulating plate 5 and the battery housing 10 to fill the gap between the second insulating plate 5 and the battery housing 10. When the battery is inverted or placed on its side, the remaining components in the battery housing 10 are firmly positioned and do not collide with the cover plate 11, thereby playing a buffering role.

[0033] A plurality of second filling blocks 62 are also provided on both sides of the protection plate 4. The height of the second filling is higher than the height of the protection plate 4. The upper surface of the second filling block 62 is in contact with the second insulating plate 5, and the lower surface of the second filling block 62 is in contact with the epoxy shell 3, which is used to play a buffering role so that the protection plate 4 is not directly subjected to force.

[0034] The first filling block 61 and the second filling block 62 are made of EVA foam with a density of 30 g / cm3.

[0035] The first insulating plate 33 and the second insulating plate 5 are made of epoxy material.

[0036] The second insulating plate 5 is also provided with a Bluetooth module 9 for connecting to a smart device.

[0037] A plurality of nickel strips 72 are provided on the front and rear surfaces of each battery module 2. The nickel strip 72 is composed of two sub-nickel strips, and the sub-nickel strip is composed of multiple nickel sheets. Each nickel sheet corresponds to the positive electrode or negative electrode of a battery cell. Adjacent nickel sheets of the same sub-nickel strip are connected by a nickel connector 73. The one-to-one corresponding nickel sheets of the two sub-nickel strips of the same nickel strip 72 are connected by a nickel connector 73. At the same time, the nickel strips 72 connected to the positive and negative electrodes of the same group of battery cells 21 are staggered.

[0038] The nickel strip 72 is used to conduct current from the battery cell group 21. The positive or negative electrodes of the battery cells of the same nickel strip 72 are connected in parallel through corresponding sub-nickel strips, so that the capacity of the battery cell group 21 connected to the same nickel strip 72 is the sum of the capacities of all battery cell groups 21 on the nickel strip 72. The positive electrode of one battery cell group 21 is connected in series with the negative electrode of another battery cell group 21 through the same nickel strip 72. At the same time, since the current of each battery cell flows from the negative electrode to the positive electrode, the current flows from the total negative electrode to the total positive electrode of the battery module 2 in an S-shaped process, so that the total voltage of the two battery modules 2 is the sum of the voltages of the battery cell groups 21 connected to each nickel strip 72.

[0039] A charging and discharging power supply 13 is provided on the outside of the cover plate 11, and the total positive electrode of the battery module 2 is connected to the positive electrode of the charging and discharging power supply 13 through the nickel strip 72, and the total negative electrode of the battery module 2 is connected to the negative electrode of the charging and discharging power supply 13 through the nickel strip 72 connecting wire passing through the protective plate 4.

[0040] A plurality of battery cell groups 21 are connected with a battery rack 22 to form a battery module 2. The battery rack 22 includes an upper battery rack 221 and a lower battery rack 222. The upper battery rack 221 is connected to the upper part of the battery cell, and the lower battery rack 222 is connected to the lower part of the battery cell. The battery rack 22 separates gaps between adjacent battery cells to enhance insulation and facilitate heat dissipation.

[0041] The battery rack 22 includes a plurality of connection units, the inner wall of the connection unit is in conformity with the shape of the battery cell, and the surface of the outer wall of the connection unit in contact with the first insulating plate 33 is a plane, which is convenient for connection with the first insulating plate 33 .

[0042] The battery rack 22 is made of ABS+PC, and the outer surface of the battery cell is provided with a PVC film for insulation.

[0043] A handle 12 is also provided on the outer side of the cover plate 11 , and the handle 12 is rotatably connected to the cover plate 11 .

[0044] The beneficial effects of the utility model are as follows: an insulating structure of a sodium ion battery box, which enhances the electrical insulation effect by arranging multiple layers of insulating plates, and has good heat resistance, so that the battery charging and discharging is safer; by arranging filling blocks between the gaps between the battery shell 10 and the insulating plates and between the insulating plates, partial pressure is buffered and the internal components of the battery are stabilized; by arranging a nickel strip 72, a plurality of battery cell groups 21 are connected in parallel to expand the rated capacity of the battery module 2, and by connecting the nickel strips 72 and the nickel strips 72, a plurality of rows of battery cell groups 21 are connected in series to increase the working voltage of the battery module 2; by arranging a battery rack 22, gaps are separated between the battery cell groups 21, which is conducive to heat dissipation and not prone to short circuit.

[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An insulation structure of a sodium ion battery box, the battery box comprising a battery shell (10) and a cover plate (11), the battery shell (10) being connected to the cover plate (11), two battery modules (2) and a protection plate (4) being arranged inside the battery shell (10), the battery module (2) being composed of a plurality of rows of battery core groups (21), the battery core group (21) being composed of a plurality of battery cores, the positive poles and negative poles of adjacent battery core groups (21) being not on the same side, the number of rows of battery core groups (21) of each battery module (2) being an odd number, characterized in that: Each surface of the battery module (2) is provided with a first insulating plate (33), and a plurality of the first insulating plates (33) form an insulating shell (3), so that the battery module (2) is insulated; a protective plate (4) is provided on the side of the insulating shell (3) close to the cover plate (11), and a second insulating plate (5) is provided above the protective plate (4), so that the protective plate (4) is insulated; a first filling block (61) is provided between the second insulating plate (5) and the battery shell (10), so that the second insulating plate (5) and the battery shell (10) are insulated. The gap is filled, and when the battery is inverted or placed on its side, the remaining components in the battery housing (10) are firmly positioned and do not collide with the cover plate (11), and at the same time play a buffering role; a plurality of second filling blocks (62) are also provided on both sides of the protection plate (4), the height of the second filling blocks is higher than the height of the protection plate (4), and the upper surface of the second filling blocks (62) is in contact with the second insulating plate (5), and the lower surface of the second filling blocks (62) is in contact with the insulating shell (3), which is used to play a buffering role so that the protection plate (4) is not directly subjected to force.

2. The insulation structure of the sodium ion battery box according to claim 1, characterized in that: The first filling block (61) and the second filling block (62) are made of EVA foam with a density of 30 g / cm3, and the first insulating plate (33) and the second insulating plate (5) are made of epoxy material.

3. The insulation structure of the sodium ion battery box according to claim 1, characterized in that: The second insulating plate (5) is also provided with a Bluetooth module (9) for connecting to a smart device.

4. The insulation structure of the sodium ion battery box according to claim 1, characterized in that: A plurality of nickel strips (72) are provided on both the front and rear surfaces of each battery module (2), wherein the nickel strip (72) is composed of two sub-nickel strips, and the sub-nickel strip is composed of a plurality of nickel sheets, each of which corresponds to the positive electrode or the negative electrode of a battery cell, and the adjacent nickel sheets of the same sub-nickel strip are connected by a nickel connector (73), and the one-to-one corresponding nickel sheets of the two sub-nickel strips of the same nickel strip (72) are connected by a nickel connector (73), and at the same time, the nickel strips (72) connecting the positive electrodes and negative electrodes of the same group of battery cells (21) are arranged in an alternating manner.

5. The insulation structure of the sodium ion battery box according to claim 4, characterized in that: The nickel strip (72) is used to conduct current from the battery cell group (21). The positive electrodes or negative electrodes of the battery cells of the same nickel strip (72) are connected in parallel through corresponding sub-nickel strips, so that the capacity of the battery cell group (21) connected to the same nickel strip (72) is the sum of the capacities of all the battery cell groups (21) on the nickel strip (72). The positive electrode of one battery cell group (21) and the negative electrode of another battery cell group (21) are connected in series through the same nickel strip (72). At the same time, since the current of each battery cell flows from the negative electrode to the positive electrode, the current flows from the total negative electrode to the total positive electrode of the battery module (2) in an S-shaped manner, so that the total voltage of the two battery modules (2) is the sum of the voltages of the battery cell groups (21) connected to each nickel strip (72).

6. The insulation structure of the sodium ion battery box according to claim 4, characterized in that: A charging and discharging power source (13) is arranged on the outside of the cover plate (11); the total positive electrode of the battery module (2) is connected to the positive electrode of the charging and discharging power source (13) via a nickel strip (72); and the total negative electrode of the battery module (2) is connected to the negative electrode of the charging and discharging power source (13) via a nickel strip (72) connecting wire passing through the protective plate (4).

7. The insulation structure of the sodium ion battery box according to claim 1, characterized in that: A plurality of battery cell groups (21) are sleeved with a battery rack (22) to form a battery module (2); the battery rack (22) comprises an upper battery rack (221) and a lower battery rack (222); the upper battery rack (221) is connected to the upper part of the battery cell, and the lower battery rack (222) is connected to the lower part of the battery cell; the battery rack (22) is used to separate gaps between adjacent battery cells, thereby enhancing insulation and facilitating heat dissipation.

8. The insulation structure of the sodium ion battery box according to claim 7, characterized in that: The battery rack (22) comprises a plurality of connection units, the inner walls of the connection units are in conformity with the shape of the battery core, and the surface of the outer walls of the connection units in contact with the first insulating plate (33) is a plane.

9. The insulation structure of the sodium ion battery box according to claim 7, characterized in that: The outer surface of the battery core is provided with a PVC film.

10. The insulation structure of the sodium ion battery box according to claim 1, characterized in that: A handle (12) is also provided on the outer side of the cover plate (11), and the handle (12) is rotatably connected to the cover plate (11).

Images