Sodium ion battery PACK structure

Abstract

The invention discloses a sodium ion battery PACK structure which comprises an outer shell, an inner container shell, a battery cell module, a BMS (Battery Management System) board and a heat dissipation module, the outer shell comprises an outer housing and a top cover; the inner container shell comprises an inner container lower shell and an inner container upper shell; the battery cell module comprises a plurality of thin sodium ion battery panels and L-shaped tabs inserted in positive and negative electrode positions of middle lines at the tops of the thin sodium ion battery panels; and the BMS board is lapped on the baffle plate and is provided with an auxiliary control area, a main control area, a heat dissipation module, positive and negative charging connection columns, a pin seat for charging a battery and a power supply wire holder. According to the invention, the vibration impact of the battery PACK in the use process can be counteracted; and heat exchange devices are arranged between the battery cell module and the inner shell and between the battery cell module and the outer shell, so that the battery cells are always in a normal working temperature range.

Description

Technical Field

[0001] The present invention relates to the technical field of battery PACK structures, and in particular to a sodium ion battery PACK structure. Background Art

[0002] Sodium-ion batteries are now gradually being widely used due to their excellent low-temperature performance and low cost. They are generally composed of components such as battery casing, battery cover, handle, battery module, packaging bracket, BMS, charging and discharging interface, etc. In different application scenarios, traditional sodium-ion battery packs still have many problems: the fixing scheme is single. Traditional sodium battery packs use simple brackets to package and fix the battery pack, and then place it in the battery box. The fixation is unstable. During the use of the battery pack, there will be friction and collision between the bracket and the inner side of the casing, which will cause the battery cells in the module to be not firmly fixed, short-circuited, and cause safety problems such as smoke and fire.

[0003] Based on the above situation, potting glue is generally used to fill the gap. This solution will increase the weight of the entire battery PACK. On the one hand, the weight increases. On the other hand, the heavy weight will cause the vehicle to need to increase the output power to meet the acceleration requirements. Under high current conditions, the battery life will be reduced. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, one objective of the present invention is to provide a sodium-ion battery pack structure that addresses issues such as a single, unstable fixation scheme, and friction and collision between the bracket and the inner side of the battery pack during use.

[0005] A sodium ion battery PACK structure proposed in the present invention includes an outer shell, an inner shell, a battery cell module, a BMS board and a heat dissipation module;

[0006] The outer shell includes an outer cover and a top cover. The lower surface of the top cover is provided with a raised card frame along the edge thereof, which is moved inward. The raised card frame is just stuck on the top inner wall of the outer cover. The top cover is provided with a handle.

[0007] The liner shell includes an liner lower shell and an liner upper shell. The four side walls of the liner lower shell are mesh frames and the top is a square docking frame edge. The bottom of the liner upper shell is stuck in the docking frame edge and the top is docked with a buffer rubber sleeve. The battery cell module is padded with a bottom buffer rubber pad at the bottom and the bottom buffer rubber pad is padded on the bottom of the liner lower shell. The four side walls of the battery cell module are affixed with side wall buffer rubber pads. After the four side walls of the battery cell module are affixed with side wall buffer rubber pads, they are inserted into the liner lower shell. The L-shaped tab on the top of the battery cell module is at the same level as the top of the liner lower shell. The BMS board and the heat dissipation module are inside the liner upper shell.

[0008] The battery module includes a plurality of thin sodium ion battery panels and L-shaped tabs inserted in the positive and negative positions of the top center line of the thin sodium ion battery panels. The plurality of thin sodium ion battery panels are stacked in a row, and the positive and negative directions of the adjacent thin sodium ion battery panels are opposite, so as to achieve docking of the L-shaped tabs on the corresponding positive and negative poles on the adjacent thin sodium ion battery panels. The plurality of thin sodium ion battery panels in the entire battery module are connected in series, and all the L-shaped tabs are covered with a stabilizing plate, and the stabilizing plate is provided with two rows of square holes. The L-shaped tabs docked on the adjacent thin sodium ion battery panels are stuck in the corresponding square holes, and the two rows of square holes are padded with baffles on the docked L-shaped tabs;

[0009] The BMS board is placed on the baffle, and is provided with a secondary control area, a main control area, a heat dissipation module, positive and negative charging posts, a pin socket for charging the battery, and a power supply socket. The main control area is provided on the left half of the BMS board, and the secondary control area is provided on the right half. The main control area is provided with positive and negative charging posts electrically connected to the main control area on both sides of the BMS board. The output end of the main control area is electrically connected to the battery charging pin socket, and the battery charging pin socket is connected to the positive and negative poles of the battery module through a wire. The secondary control area is used to control the operation of the main control area. The heat dissipation module is attached to the main control area. The heat dissipation module is powered by the heat dissipation socket interface on the BMS board. The power supply socket is electrically connected to the positive and negative poles of the battery module. The top cover is provided with a charging interface and a discharging interface. The charging interface is electrically connected to the positive and negative charging posts through a wire, and the discharging interface is electrically connected to the power supply socket through a wire.

[0010] In some embodiments of the present invention, the outer cover and the top cover are both made of sheet metal by stretching and stamping, and the inner liner lower shell and the inner liner upper shell are both made of flame-retardant plastic material by mold opening.

[0011] In other embodiments of the present invention, a vertical U-shaped enclosure is provided on the top of the thin sodium ion battery panel, and the middle plate of the vertical U-shaped enclosure is vertically fixed on the middle line of the top of the thin sodium ion battery panel and blocks the positive and negative electrode positions, and the L-shaped tab passes through the middle plate of the vertical U-shaped enclosure and is connected to the positive and negative electrodes;

[0012] The opposite vertical U-shaped panels of two adjacent thin sodium ion battery panels are butted against each other to form a square frame, and insulating rubber blocks are stuffed between the vertical U-shaped panels facing away from the adjacent thin sodium ion battery panels to limit the vertical U-shaped panels.

[0013] In other embodiments of the present invention, the heat dissipation module includes a heat dissipation block, heat dissipation fins and a heat dissipation fan. The heat dissipation block is connected with outward-diffusing heat dissipation fins around it. A heat dissipation fan is installed in the middle of the heat dissipation fins on the upper surface of the heat dissipation block. The heat dissipation block is attached to the main control area through thermal conductive silicone, and the heat dissipation fan is powered by the heat dissipation socket interface on the BMS board.

[0014] In other embodiments of the present invention, the thin sodium ion battery panel is wrapped with insulating plastic.

[0015] In other embodiments of the present invention, the mesh frame is formed by staggered vertical plates and horizontal plates, the holes in the mesh frame are square holes, and the width of the vertical plates and horizontal plates is the same as the thickness of the upper shell of the inner liner.

[0016] In other embodiments of the present invention, a disassembly and maintenance cover is installed on the top cover.

[0017] In other embodiments of the present invention, after the raised card frame is clamped on the inner wall of the top of the outer cover shell, multiple bolts are passed through the side walls of the top wall of the outer cover shell and screwed onto the raised card frame to fix the outer cover shell and the top cover.

[0018] In other embodiments of the present invention, the raised clamping frame fits with the outer wall of the buffer rubber sleeve after being clamped on the inner wall of the top of the outer cover shell.

[0019] In the present invention, the outer shell is made of sheet metal blanks by integral stretching and stamping, and the inner shell is made of flame-retardant plastic. The plastic material is molded, and the outer shell and the inner shell are divided into upper and lower shell structures. The upper and lower shells facilitate the encapsulation of the battery module into the shell. A limiting device is adapted between the outer shell and the inner shell. A buffer rubber pad is affixed to the outside of the battery module to offset the vibration and impact of the battery PACK during use; a heat exchange device is adapted between the battery module and the inner shell and the outer shell to ensure that the battery cell is always within the normal operating temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a structural schematic diagram of a sodium ion battery PACK structure proposed by the present invention.

[0022] Figure 2 This is a structural schematic diagram of a sodium ion battery PACK structure proposed by the present invention (with the top cover removed).

[0023] Figure 3 This is a structural schematic diagram of a sodium ion battery PACK structure proposed in the present invention (with the top cover and outer cover removed).

[0024] Figure 4 For Figure 3 Schematic diagram of the sodium-ion battery PACK structure with the BMS board removed.

[0025] Figure 5 This is a schematic structural diagram of the battery cell module proposed in the present invention.

[0026] Figure 6 This is a schematic structural diagram of the thin sodium ion battery panel proposed in the present invention.

[0027] In the figure: 1. Outer shell; 10. Top cover; 11. Outer cover; 12. Handle; 13. Charging port; 14. Discharging port; 15. Disassembly and maintenance cover; 2. Inner liner lower shell; 3. BMS board; 31. Auxiliary control area; 32. Pin socket; 33. Heat dissipation module; 34. Power supply terminal block; 35. Positive and negative charging terminals; 4. Thin sodium ion battery board; 40. L-shaped tab; 400. Vertical U-shaped enclosure; 401. Stabilizing plate; 5. Side wall cushion pad; 6. Bottom cushion pad; 7. Inner liner upper shell; 71. Buffer rubber sleeve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1-6 As shown, a sodium ion battery PACK structure proposed in the present invention includes an outer shell, an inner shell, a battery cell module, a BMS board 3 and a heat dissipation module;

[0030] The outer shell includes an outer cover shell 11 and a top cover 10. The lower surface of the top cover 10 is provided with a raised card frame that moves inward along the edge. The raised card frame is just stuck on the top inner wall of the outer cover shell 11. The top cover 10 is provided with a handle 12, so as to form a sealed outer shell.

[0031] The liner shell includes a liner lower shell 2 and an liner upper shell 7. The four side walls of the liner lower shell 2 are mesh frames and the top is a square docking frame edge. The bottom of the liner upper shell is stuck in the docking frame edge and the top is docked with a buffer rubber sleeve 71. The battery module is padded with a bottom buffer rubber pad 6 at the bottom and the bottom buffer rubber pad 6 is padded on the bottom of the liner lower shell 2. The four side walls of the battery module are affixed with side wall buffer rubber pads 5. After the four side walls of the battery module are affixed with side wall buffer rubber pads 5, they are inserted into the liner lower shell 2. The L-shaped tab 40 on the top of the battery module is at the same horizontal plane as the top of the liner lower shell 2. The BMS board 3 and the heat dissipation module 33 are inside the liner upper shell 7;

[0032] The inner shell has an insulating effect. The four side walls of the inner shell lower shell 2 are mesh frames that provide both support and heat dissipation. The inner shell protects the battery module from being squeezed when the outer layer is impacted, providing dual protection. The cushioning rubber pad 6 protects the position of the inner shell upper shell 7 and improves the sealing of the connection between the outer shell 11 and the top cover 10. The heat dissipation module 33 solves the problem of battery cell heating. A heat exchange device is installed between the battery module and the inner and outer shells to ensure that the battery cell is always within the normal operating temperature range.

[0033] The battery module includes a plurality of thin sodium ion battery panels 4 and L-shaped tabs inserted in the positive and negative positions of the top center line of the thin sodium ion battery panel 4. The plurality of thin sodium ion battery panels 4 are stacked in a row, and the positive pole 41 and the negative pole 42 on the adjacent thin sodium ion battery panels 4 are in opposite directions, thereby achieving docking of the L-shaped tabs on the corresponding positive pole 41 and the negative pole 42 on the adjacent thin sodium ion battery panels 4. The plurality of thin sodium ion battery panels 4 in the entire battery module are connected in series, and all the L-shaped tabs 40 are sleeved with a stabilizing plate 401, and the stabilizing plate 401 is provided with two rows of square holes. The L-shaped tabs 40 docked on the adjacent thin sodium ion battery panels 4 are stuck in the corresponding square holes, and the two rows of square holes are padded with baffles 402 on the docked L-shaped tabs 40;

[0034] The stabilizing plate 401 supports and fixes the L-shaped tabs 40. The positive electrodes 41 and negative electrodes 42 on adjacent thin sodium ion battery panels 4 are in opposite directions, thereby achieving docking of the L-shaped tabs on the corresponding positive electrodes 41 and negative electrodes 42 on adjacent thin sodium ion battery panels 4 to achieve overall series connection.

[0035] The BMS board 3 is placed on the baffle 402, and is provided with a secondary control area 31, a main control area, a heat dissipation module 33, positive and negative charging terminals 35, a battery charging pin socket 32 ​​and a power supply terminal socket 34. The left half of the BMS board 3 is provided with a main control area, and the right half is provided with a secondary control area 31. The main control area is provided with positive and negative charging terminals 35 electrically connected to the main control area on both sides of the BMS board 3. The output end of the main control area is electrically connected to the battery charging pin socket 32. The battery The charging pin socket 32 ​​is connected to the positive and negative poles of the battery module through a wire. The secondary control area 31 is used to control the operation of the main control area. The heat dissipation module is attached to the main control area. The heat dissipation module is powered by the heat dissipation socket interface on the BMS board 3. The power supply terminal block 34 is electrically connected to the positive and negative poles of the battery module. The top cover 10 is provided with a charging interface 3 and a discharge interface 14. The charging interface 13 is electrically connected to the positive and negative charging posts through a wire, and the discharge interface 14 is electrically connected to the power supply terminal block 34 through a wire.

[0036] The secondary control area 31 is used to control charging, and the charging interface 3 is a charging interface with a protocol.

[0037] The outer cover 11 and the top cover 10 are both made of sheet metal by stretching and stamping, and the inner liner lower shell 2 and the inner liner upper shell 7 are both made of flame-retardant plastic material by mold opening.

[0038] A vertical U-shaped enclosure 400 is provided on the top of the thin sodium ion battery panel 4. The middle plate of the vertical U-shaped enclosure 400 is vertically fixed on the middle line of the top of the thin sodium ion battery panel 4 and blocks the positive and negative pole positions. The L-shaped tab 40 passes through the middle plate of the vertical U-shaped enclosure 400 and is connected to the positive and negative poles.

[0039] The vertically facing U-shaped panels 400 of two adjacent thin sodium-ion battery panels 4 are butted together to form a square frame. Insulating rubber blocks 43 are inserted between the vertically facing U-shaped panels 400 of adjacent thin sodium-ion battery panels 4 to restrain the vertical U-shaped panels 400. The L-shaped tabs 40, where they are electrically connected to the thin sodium-ion battery panels 4, are susceptible to bending. The vertical U-shaped panels 400 are placed over the L-shaped tabs 40 to stabilize their base.

[0040] The heat dissipation module 33 includes a heat sink, heat fins, and a cooling fan. The heat sink is connected to a perimeter of outward-spreading heat fins. A cooling fan is mounted between the heat sink fins on the upper surface of the heat sink. The heat sink is attached to the main control area via thermally conductive silicone. The cooling fan is powered via a heat sink socket on the BMS board. Similar to the heat dissipation device on a computer CPU, a water-cooled heat dissipation structure can also be used, similar to the CPU on a computer motherboard.

[0041] The thin sodium ion battery plate 4 is wrapped with insulating plastic to form a protective layer.

[0042] The mesh frame 2 is formed by staggering multiple vertical and horizontal plates. The holes in the mesh frame 2 are square holes. The width of the vertical and horizontal plates is the same as the thickness of the inner shell 7. It is similar to a reinforced net, but the whole is light.

[0043] A disassembly and maintenance cover 15 is installed on the top cover 10 to facilitate later disassembly and maintenance.

[0044] After the raised card frame is clamped on the top inner wall of the outer cover shell 11, multiple bolts are passed through the side walls of the top wall of the outer cover shell 11 and screwed on the raised card frame to fix the outer cover shell 11 and the top cover 10. After being clamped, the bolts are fixed more firmly.

[0045] After being clamped on the inner wall of the top of the outer cover 11 , the protruding frame is fitted with the outer wall of the buffer rubber sleeve 71 , thereby improving the sealing between the outer cover 11 and the top cover 10 .

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sodium ion battery PACK structure, characterized in that: It comprises an outer shell, an inner shell, a battery cell module, a BMS board (3) and a heat dissipation module; The outer shell (1) comprises an outer cover shell (11) and a top cover (10); a raised card frame is provided along the edge of the lower surface of the top cover (10) and moves inwards in one circle; the raised card frame is just stuck on the top inner wall of the outer cover shell (11); and a handle (12) is provided on the top cover (10); The inner shell comprises an inner shell lower shell (2) and an inner shell upper shell (7); the four side walls of the inner shell lower shell (2) are mesh frames and the top is a square docking frame edge; the bottom of the inner shell upper shell is stuck in the docking frame edge and the top is docked with a buffer rubber sleeve (71); the bottom of the battery module is padded with a bottom buffer rubber pad (6) and the bottom buffer rubber pad (6) is padded on the bottom of the inner shell lower shell (2); the four side walls of the battery module are affixed with side wall buffer rubber pads (5); the four side walls of the battery module are affixed with the side wall buffer rubber pads (5) and then inserted into the inner shell lower shell (2); the L-shaped pole ear (40) on the top of the battery module is at the same horizontal plane as the top of the inner shell lower shell (2); the BMS board (3) and the heat dissipation module (33) are inside the inner shell upper shell (7); The battery core module comprises a plurality of thin sodium ion battery panels (4) and L-shaped pole tabs inserted at the positive and negative pole positions of the top middle line of the thin sodium ion battery panels (4); the plurality of thin sodium ion battery panels (4) are stacked in a row; the positive poles (41) and negative poles (42) on adjacent thin sodium ion battery panels (4) are in opposite directions, so that the L-shaped pole tabs on the corresponding positive poles (41) and negative poles (42) on adjacent thin sodium ion battery panels (4) are butted; the plurality of thin sodium ion battery panels (4) in the entire battery core module are connected in series; a stabilizing plate (401) is sleeved on all the L-shaped pole tabs (40); two rows of square holes are provided on the stabilizing plate (401); the butted L-shaped pole tabs (40) on adjacent thin sodium ion battery panels (4) are stuck in the corresponding square holes; the two rows of square holes are padded with baffles (402) on the butted L-shaped pole tabs (40); The BMS board (3) is placed on the baffle (402). The BMS board (3) is provided with a secondary control area (31), a main control area, a heat dissipation module (33), positive and negative charging terminals (35), a pin socket (32) for charging the battery, and a power supply connection socket (34). The left half of the BMS board (3) is provided with the main control area, and the right half is provided with the secondary control area (31). The main control area is provided with positive and negative charging terminals (35) electrically connected to the main control area on both sides of the BMS board (3). The output end of the main control area is electrically connected to the pin socket (32) for charging the battery. The pin socket (32) for charging the battery is connected to the positive and negative electrodes of the battery cell module through a wire. The secondary control area (31) is used to control the operation of the main control area. The heat dissipation module is attached to the main control area. The heat dissipation module is powered through a heat dissipation socket interface on the BMS board (3). The power supply connection socket (34) is electrically connected to the positive and negative electrodes of the battery cell module. The top cover (10) is provided with a charging interface (13) and a discharging interface (14). The charging interface (13) is electrically connected to the positive and negative charging terminals through a wire, and the discharging interface (14) is electrically connected to the power supply connection socket (34) through a wire.

2. A sodium ion battery PACK structure according to claim 1, characterized in that: Both the outer cover (11) and the top cover (10) are made by stretching and stamping sheet metal materials. Both the inner liner lower shell (2) and the inner liner upper shell (7) are made by molding flame-retardant plastic materials.

3. A sodium ion battery PACK structure according to claim 1, characterized in that: The top of the thin sodium ion battery panel (4) is provided with a vertically placed U-shaped enclosure (400). The middle plate of the vertically placed U-shaped enclosure (400) is vertically fixed on the middle line at the top of the thin sodium ion battery panel (4) and seals the positive and negative electrode positions. The L-shaped tab (40) passes through the middle plate of the vertically placed U-shaped enclosure (400) and is connected to the positive and negative electrodes. The relatively vertically placed U-shaped enclosures (400) of two adjacent thin sodium ion battery panels (4) are docked with each other to form a square box, and an insulating rubber block (43) is inserted between the vertically placed U-shaped enclosures (400) of the adjacent thin sodium ion battery panels (4) facing away from each other to limit the vertically placed U-shaped enclosures (400).

4. A sodium ion battery PACK structure according to claim 1, characterized in that: The heat dissipation module (33) includes a heat dissipation block, heat dissipation fins, and a heat dissipation fan. The heat dissipation block is connected with outward-diffusing heat dissipation fins around it. The heat dissipation fan is installed at the middle position of the heat dissipation fins on the upper surface of the heat dissipation block. The heat dissipation block is attached to the main control area through thermal conductive silicone. The heat dissipation fan is powered through a heat dissipation socket interface on the BMS board.

5. A sodium ion battery PACK structure according to claim 1, characterized in that: The outside of the thin sodium ion battery panel (4) is wrapped with insulating plastic.

6. A sodium ion battery PACK structure according to claim 1, characterized in that: The mesh frame (2) is formed by the intersection of multiple vertical plates and horizontal plates. The holes in the mesh frame (2) are square holes. The widths of the vertical plates and the horizontal plates are the same as the thickness of the inner liner upper shell (7).

7. A sodium ion battery PACK structure according to claim 1, characterized in that: A disassembly and maintenance cover (15) is installed on the top cover (10).

8. A sodium ion battery PACK structure according to claim 1, characterized in that: After the convex clamping frame is clamped on the inner wall of the top of the outer cover (11), a plurality of bolts are passed through the top wall side wall of the outer cover (11) and screwed onto the convex clamping frame to fix the outer cover (11) and the top cover (10).

9. A sodium ion battery PACK structure according to claim 1, characterized in that: The protruding clamping frame fits with the outer wall of the buffer rubber sleeve (71) after being clamped on the inner wall of the top of the outer cover shell (11).

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