Sodium ion battery

Abstract

The utility model relates to the field of batteries, and discloses a sodium ion battery which comprises a bottom shell and a wire row, the bottom shell is provided with a square groove used for placing a battery cell, the bottom shell is provided with a fixed layer framework and a heat dissipation layer framework from inside to outside, the wire row is arranged between an upper cover and the battery cell, and the wire row is arranged between the upper cover and the battery cell. The heat dissipation layer framework is provided with two opposite side edges, the two side edges are respectively provided with a heat dissipation fan, and a power wire harness and a signal wire harness led out from the flat cable respectively pass through the two heat dissipation fans; according to the utility model, the heat dissipation fan is arranged on the heat dissipation layer framework, and the wire harness on the wire row is also arranged near the heat dissipation fan, so that heat generated by charging and discharging of the sodium ion battery and heat generated by working of a lead can be effectively dissipated, and the service life of the sodium ion battery is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium ion batteries, in particular to a sodium ion battery. Background Art

[0002] The energy density, power density and other indicators of sodium-ion batteries are worse than those of lithium-ion batteries. However, compared with lithium-ion batteries, the probability of sodium-ion batteries producing dendrites is low and the probability of spontaneous combustion is also low. At the same time, sodium-ion batteries have excellent performance in terms of rate and low-temperature resistance, making them suitable for use in some special extreme environments. Therefore, it has become a trend for sodium-ion batteries to partially replace lithium-ion batteries and lead-acid batteries.

[0003] The prior art believes that sodium-ion batteries are not prone to spontaneous combustion and are highly safe, thus ignoring the heat dissipation structure of the sodium-ion battery itself and allocating some heat dissipation effects from the heat dissipation structures of other devices to the sodium-ion battery. Utility Model Content

[0004] The purpose of the utility model is to overcome the problem of poor heat dissipation of the sodium ion battery itself in the prior art, and to provide a sodium ion battery that can dissipate the heat generated by its own charging and discharging and the heat generated by the wire, thereby extending the service life of the sodium ion battery.

[0005] In order to achieve the above object, the utility model provides a sodium ion battery, comprising:

[0006] A bottom shell, wherein a square groove for placing the battery cell is formed on the bottom shell, and a fixing layer structure and a heat dissipation layer structure are arranged from the inside to the outside of the bottom shell; and

[0007] A wire row, the wire row is arranged between the upper cover and the battery core;

[0008] The heat dissipation layer structure has two opposite sides, and heat dissipation fans are respectively arranged on the two sides. The power harness and signal harness led out from the cable pass through the two heat dissipation fans respectively.

[0009] Preferably, the fixed layer structure includes two connecting plates, a plurality of connecting sheets are arranged on the connecting plates, the connecting sheets are arranged between two adjacent pole sheets and connect the two adjacent pole sheets, and the two connecting plates are respectively arranged on opposite sides of the battery pack.

[0010] Preferably, the connecting plates are arranged in two rows on the connecting plate in a matrix form, and four connecting plates are arranged between every two adjacent battery pack pole pieces.

[0011] Preferably, the fixed layer structure includes a heat shrink sleeve 1 and a heat shrink sleeve 2, the heat shrink sleeve 2 is heat shrunk on the outer walls of the battery pack and the connecting plate along the height direction of the battery pack, the heat shrink sleeve 1 is heat shrunk on the outer wall of the heat shrink sleeve 2 along the length direction of the battery pack, and a silicone pad is laid between the bottom surface of the battery pack and the heat shrink sleeve 2.

[0012] Preferably, the fixed layer structure also includes two fixed brackets installed on the second outer wall of the heat shrink sleeve, and the fixed bracket is configured as a groove plate formed by connecting one side of two spaced and parallel plates with a number of spacer rods, and one end of the groove plate is sealed. The two fixed brackets are respectively clamped on both sides of the connecting plate installed on the battery pack, and the seal of the groove plate is set on the bottom surface of the battery pack.

[0013] Preferably, shock-absorbing foam 2 is installed on the upper and lower parts of the fixing bracket.

[0014] Preferably, the heat dissipation layer structure is configured as a metal square shell without a top cover, two opposite sides of the metal square shell are provided with ventilation holes for installing the heat dissipation fan, and the other two opposite sides of the metal square shell are provided with multiple heat dissipation holes.

[0015] Preferably, the upper cover includes a label plate, a buffer gasket, a cover plate, a protective plate, an epoxy plate and a shock-absorbing foam arranged in sequence from top to bottom, and the peripheral wall of the cover plate is provided with a boundary frame protruding from the upper surface and the lower surface of the cover plate, and the boundary frame is located below the label plate, and the buffer gasket, the protective plate, the epoxy plate and the shock-absorbing foam are all fixed in the boundary frame.

[0016] Preferably, a charging and discharging interface and a main switch are provided on the upper cover, and both the charging and discharging interface and the main switch are conductively connected to the battery pack.

[0017] Preferably, the upper cover is provided with a handle protruding upward.

[0018] Through the above technical solution, a cooling fan is installed on the heat dissipation layer structure on the bottom shell, and the wiring harness on the wiring array is also arranged near the cooling fan, which can effectively dissipate the heat generated by the charging and discharging of the sodium-ion battery itself and the heat generated by the work of the wires, thereby extending the service life of the sodium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural exploded diagram of a battery pack fixing device provided by the utility model;

[0020] Figure 2 The utility model is a structural schematic diagram of a heat shrink sleeve 1 and a heat shrink sleeve 2 of a battery pack fixing device provided by the utility model.

[0021] Description of Reference Numerals

[0022] 1. Charging and discharging interface; 2. Handle; 3. Label plate; 4. Main switch; 5. Buffer gasket; 6. Cover plate; 7. Protective plate; 8. Epoxy board; 9. Shock-absorbing foam 1; 10. Connecting plate; 11. Heat shrink sleeve 1; 12. Heat shrink sleeve 2; 13. Metal square shell; 14. Cooling fan; 15. Silicone pad; 16. Heat dissipation port; 17. Battery cell; 18. Fixed bracket. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] As mentioned above, the utility model provides a sodium ion battery that can timely dissipate the heat generated by its own charging and discharging and the heat generated by the wire, thereby extending the service life of the sodium ion battery.

[0025] like Figure 1 As shown, the sodium ion battery includes a bottom shell and a cable arrangement, the bottom shell is provided with a square groove for placing the battery cell 17, the bottom shell is provided with a fixed layer structure and a heat dissipation layer structure from the inside to the outside, the cable arrangement is arranged between the upper cover and the battery cell 17, wherein the heat dissipation layer structure has two opposite side edges, and cooling fans 14 are respectively arranged on the two sides, and the power harness and signal harness led out from the cable pass through the two cooling fans 14 respectively.

[0026] In the utility model, the battery cell 17 is arranged in the square groove of the bottom shell, and the bottom shell is provided with a fixing layer structure and a heat dissipation layer structure from the inside to the outside, which are respectively used to fix and dissipate heat for the battery cell 17, so as to maintain the stability of the battery cell 17 and delay the life of the battery cell 17, wherein two heat dissipation fans 14 are arranged on the heat dissipation layer structure, and the two heat dissipation fans 14 are respectively arranged on both sides of the battery cell 17, and the line row is arranged above the battery cell 17, and the power wiring harness and the signal wiring harness are respectively arranged back to back from both sides of the line row, so that the two pass through the vicinity of the two heat dissipation fans 14 respectively, which can not only effectively reduce electromagnetic interference, but also use the heat dissipation fan 14 to blow away the heat in time, thereby extending the service life of the sodium ion battery.

[0027] In the utility model, the fixed layer structure includes two connecting plates 10, and a plurality of connecting plates are arranged on the connecting plates 10. The connecting plates are arranged between two adjacent pole pieces and connect the two adjacent pole pieces, so as to connect the pole pieces in series and parallel. The existence of the connecting plates also has a supporting effect on the pole pieces. Considering the need to maintain the stability of the battery cell 17, the two connecting plates 10 are respectively arranged on opposite sides of the battery cell 17 so that both sides of the battery cell 17 have equal supporting conditions.

[0028] In the utility model, in order to maintain the balance of the battery cell 17, there is a way of setting the connecting plates, that is, the connecting plates are arranged in two columns in a matrix form on the connecting plate 10, and two connecting plates in each row are evenly distributed on one side of the pole piece. The two connecting plates 10 are provided with four connecting plates between every two adjacent pole pieces.

[0029] Combination Figure 2 As shown, in the utility model, the fixed layer structure includes a heat shrink sleeve 11 and a heat shrink sleeve 12. The heat shrink sleeve 12 is heat shrunk on the outer wall of the battery cell 17 and the connecting plate 10 along the height direction of the battery cell 17, and the heat shrink sleeve 11 is heat shrunk on the outer wall of the heat shrink sleeve 12 along the length direction of the battery cell 17. The heat shrink sleeve 11 and the heat shrink sleeve 12 are used to heat shrink and wrap the battery cell 17 horizontally and vertically respectively, which can effectively fix the battery cell 17 and insulate and protect it. At the same time, a silicone pad 15 is laid between the bottom surface of the battery cell 17 and the heat shrink sleeve 12, which has a good insulation and shock absorption effect on the battery cell 17. The heat shrink sleeve 11 directly fixes the silicone pad 15 relative to the battery cell 17, saving other fixing materials.

[0030] In the utility model, considering the stability of the sodium ion battery and the balance of the internal space, the fixed layer structure also includes two fixed brackets 18 installed on the outer wall of the heat shrink sleeve 12, and the fixed bracket 18 is set to a groove plate formed by connecting one side of two spaced and parallel plates with a plurality of spacer rods. The two parallel plates are arranged between the battery cell 17 and the metal square shell 13, and the thickness thereof can play a good role in fixing and shaping the battery cell 17. The plurality of spacer rods play a good role in fixing the battery cell 17, and the space between the rods has a good heat dissipation effect. One end of the groove plate is sealed. After the outer wall of the battery cell 17 is affixed with green shell paper, the two fixed brackets 18 are respectively clamped on both sides of the connecting plate 10 installed on the battery cell 17. The elastic range of the green shell paper can reserve a certain space for the breathing expansion of the battery cell 17. The seal of the groove plate is arranged on the bottom surface of the battery cell 17 to support the battery cell 17 to a certain height, which is conducive to the heat dissipation at the bottom.

[0031] In order to further reduce the impact of external vibration on the battery cell 17, shock-absorbing foam 19 is installed on the upper part (not marked) and the lower part of the fixed bracket 18. Four shock-absorbing foams 19 are installed on both sides of the battery cell 17 to maintain the stability of the battery cell 17 in the metal square shell 13. At the same time, sufficient space is left between the upper and lower shock-absorbing foams 19 without affecting heat dissipation.

[0032] Keep watching Figure 1In the present invention, the heat dissipation layer structure is configured as a metal square shell 13 without a top cover, which has strong rigidity and heat dissipation. Ventilation holes are opened on two opposite sides of the metal square shell 13 for installing the heat dissipation fan 14, and multiple heat dissipation holes 16 are opened on the other two opposite sides of the metal square shell 13 to increase the heat dissipation effect.

[0033] In the utility model, the upper cover includes a label plate 3, a buffer gasket 5, a cover plate 6, a protective plate 7, an epoxy plate 8 and a shock-absorbing foam 9 which are arranged in sequence from top to bottom. The peripheral wall of the cover plate 6 is provided with a boundary frame protruding from the upper surface and the lower surface of the cover plate 6. The boundary frame is located below the label plate 3. The label plate 3 can shield the lower structure from dust or other debris. The buffer gasket 5, the protective plate 7, the epoxy plate 8 and the shock-absorbing foam 9 are all fixed in the boundary frame to protect the edges of the buffer gasket 5, the protective plate 7, the epoxy plate 8 and the shock-absorbing foam 9 from being bumped.

[0034] In the utility model, a charge and discharge interface 1 and a main switch 4 are provided on the upper cover, and both the charge and discharge interface 1 and the main switch 4 are conductively connected to the battery cell 17 .

[0035] In the utility model, the upper cover is provided with a handle 2 protruding upwards, so as to facilitate the transportation of the sodium ion battery.

[0036] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A sodium ion battery, characterized in that: include: A bottom shell, the bottom shell being provided with a square groove for accommodating the battery core (17), and the bottom shell being provided with a fixing layer structure and a heat dissipation layer structure from the inside to the outside; and A wire row, the wire row being arranged between the upper cover and the battery core (17); The heat dissipation layer structure has two opposite sides, and heat dissipation fans (14) are respectively arranged on the two sides, and the power wire harness and signal wire harness led out from the wire row pass through the two heat dissipation fans (14) respectively; The fixed layer structure comprises two connecting plates (10), a plurality of connecting plates are arranged on the connecting plates (10), the connecting plates are arranged between two adjacent pole pieces and connect the two adjacent pole pieces, and the two connecting plates (10) are respectively arranged on two opposite sides of the battery core (17); The heat dissipation layer structure is configured as a metal square shell (13) without a top cover, two opposite sides of the metal square shell (13) are provided with ventilation holes for installing the heat dissipation fan (14), and the other two opposite sides of the metal square shell (13) are provided with a plurality of heat dissipation holes (16).

2. The sodium ion battery according to claim 1, characterized in that The connecting plates are arranged in two rows in a matrix form on the connecting plate (10), and four connecting plates are arranged between every two adjacent pole pieces.

3. The sodium ion battery according to claim 1, characterized in that: The fixed layer structure comprises a first heat shrink sleeve (11) and a second heat shrink sleeve (12); the second heat shrink sleeve (12) is heat-shrunk on the outer wall of the battery core (17) and the connecting plate (10) along the height direction of the battery core (17); the first heat shrink sleeve (11) is heat-shrunk on the outer wall of the second heat shrink sleeve (12) along the length direction of the battery core (17); and a silicone pad (15) is laid between the bottom surface of the battery core (17) and the second heat shrink sleeve (12).

4. The sodium ion battery according to claim 3, characterized in that: The fixed layer structure also includes two fixed brackets (18) installed on the outer wall of the second heat shrink sleeve (12), and the fixed bracket (18) is set as a slot plate formed by connecting one side of two spaced and mutually parallel plates with a plurality of spacer rods, and one end of the slot plate is sealed. The two fixed brackets (18) are respectively clamped on the two sides of the connecting plate (10) installed on the battery cell (17), and the seal of the slot plate is set on the bottom surface of the battery cell (17).

5. The sodium ion battery according to claim 4, characterized in that: Shock-absorbing foam 2 (19) is installed on the upper and lower parts of the fixing bracket (18).

6. The sodium ion battery according to claim 1, characterized in that: The upper cover comprises a label plate (3), a buffer gasket (5), a cover plate (6), a protection plate (7), an epoxy plate (8) and a shock-absorbing foam (9) which are arranged in sequence from top to bottom. The peripheral wall of the cover plate (6) is provided with a boundary frame protruding from the upper surface and the lower surface of the cover plate (6). The boundary frame is located below the label plate (3). The buffer gasket (5), the protection plate (7), the epoxy plate (8) and the shock-absorbing foam (9) are all fixed in the boundary frame.

7. The sodium ion battery according to claim 6, characterized in that: The upper cover is provided with a charging and discharging interface (1) and a main switch (4), and both the charging and discharging interface (1) and the main switch (4) are conductively connected to the battery core (17).

8. The sodium ion battery according to claim 7, characterized in that: The upper cover is provided with a handle (2) protruding upward.

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