A high-rate starting power supply for sodium batteries

Abstract

The utility model provides a kind of sodium electricity high rate starting power supply, belong to starting power supply technical field.The starting power supply is in line with the physicochemical performance of sodium ion battery, and is durable and reliable, with long service life.The starting power supply, battery module is fixedly packaged in the shell, and a negative pole and a positive pole are fixedly arranged on the shell, the battery module is connected with the negative pole and the positive pole, the limiting assembly of battery module is supported between the group battery and the shell, the group battery is supported and limited, the control assembly of battery module is connected with the group battery, and the group battery is balanced and controlled, and the electrical equipment is used by connecting the negative pole and the positive pole.The starting power supply is designed in line with the physicochemical performance of sodium ion battery, overcoming the problem of existing battery low-temperature environment performance reduction, improving the safety and reliability of the starting power supply, and the safety and reliability are improved by setting overload automatic protection mechanism in the battery module.

Description

Technical Field

[0001] This utility model belongs to the field of starting power supply technology, and in particular relates to a sodium-electric high-rate starting power supply. Background Technology

[0002] Current battery technology has the following drawbacks: Lithium-ion batteries suffer from low-temperature performance bottlenecks. At low temperatures (below 0°C), ion migration is hindered, and electrolyte viscosity increases significantly with decreasing temperature. At -20°C, the lithium-ion migration rate decreases by more than 50%, leading to an increase in internal resistance of 30%-50% and a capacity decay of 40%-60%. Discharge efficiency decreases by 25%-30% in low-temperature environments, voltage output becomes unstable, and it is easy to trigger a sudden drop in power or automatic shutdown (such as a 50% reduction in the range of electric vehicles in winter). Low-temperature operating conditions also lead to lifespan degradation. Low-temperature charging causes SEI film thickening and lithium deposition, shortening cycle life by more than 30%, requiring heating to above 15°C for normal charging.

[0003] Lead-acid batteries have limitations in low-temperature applications. Low temperatures cause a linear increase in internal resistance; for every 10°C drop in temperature, the internal resistance increases by 15%-20%, and at 0°C, the discharge capacity is only 50%-60%. In low-temperature environments, ion transport is sluggish, and the migration speed of electrolyte ions decreases by 40%-50%, significantly reducing charging efficiency and reducing the actual range of electric vehicles by 1 / 3 to 1 / 2.

[0004] Sodium-ion batteries have the following technical advantages in low-temperature environments: Optimized ion kinetics result in low sodium ion migration resistance at low temperatures. The Stokes radius of sodium ions (2.8 Å) is smaller than that of lithium ions (3.8 Å), reducing migration resistance in the electrolyte by 30%. Rapid low-temperature diffusion is achieved, with a diffusion rate 5-8 times faster than lithium ions at -40℃, significantly reducing charge transfer impedance. Breakthrough low-temperature stability is achieved through superior solvation energy. The solvation energy of sodium ions (194 kJ / mol) is lower than that of lithium ions (239 kJ / mol), making it easier for them to escape the solvent shell. Improved electrolyte performance is achieved, with the acetonitrile-based electrolyte having a freezing point as low as -80℃ and an ionic conductivity >10 mS / cm at -40℃, ensuring liquid transport capabilities. Interface and structural innovations, including SEI film-forming additives, reduce low-temperature interface resistance by 60%. Material compatibility is enhanced: aluminum foil anode current collectors prevent low-temperature embrittlement of copper foil, reducing internal resistance by 15%. The layered oxide cathode achieves a cycle efficiency of 95% at -40℃. Summary of the Invention

[0005] To address the problems existing in the background technology, this utility model provides a sodium-ion battery high-rate starting power supply that matches the physicochemical properties of sodium-ion batteries, has high durability and reliability, and a long service life.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a sodium-electric high-rate starting power supply, including a shell and a battery module fixedly encapsulated inside the shell. A negative terminal and a positive terminal are fixedly disposed on the shell. The battery module is connected to both the negative terminal and the positive terminal. The battery module includes a busbar output component, a limiting component, a control component, and a battery pack. The battery pack includes multiple battery strips arranged in a matrix. The busbar output component connects to the multiple battery strips. The limiting component is disposed outside the battery pack and supports and limits the battery pack inside the shell. The control component is connected to the battery pack through the busbar output component and performs equalization drive control on the battery module. The electrical device uses the starting power supply by connecting to the negative terminal and the positive terminal.

[0007] Each of the battery packs includes multiple battery cells, each of which is a pouch sodium-ion battery. The multiple battery cells are stacked along the thickness direction, and adjacent battery cells are bonded together. The tabs of each battery cell are welded to the busbar lead-out assembly. The multiple battery packs are stacked and combined and bound together with fiberglass tape to form a battery pack.

[0008] The limiting component includes an epoxy board, EVA and a support end plate. Support end plates are provided at both ends of the length direction of the battery pack, and an epoxy board is installed between the battery pack and the support end plate.

[0009] Epoxy boards are laid on both sides of the battery pack in the width direction. The epoxy boards on the same side as the busbar lead-out assembly are spaced apart between the battery pack and the busbar lead-out assembly. Multiple through slots are opened on the epoxy boards between the busbar lead-out assembly and the battery pack. The tabs of each battery cell pass through the through slots and are connected to the busbar lead-out assembly. The EVA is installed around the battery pack as a support pad between the outer shell and the battery pack.

[0010] The busbar leading assembly includes a series aluminum busbar, a positive lead aluminum busbar, a negative lead aluminum busbar, a negative electrode connecting aluminum busbar, and a positive electrode connecting aluminum busbar. Each of the series aluminum busbar, the positive lead aluminum busbar, and the negative lead aluminum busbar has a mounting groove. The tab of each battery cell is aligned and passes through each mounting groove and is welded to the aligned series aluminum busbar, the positive lead aluminum busbar, or the negative lead aluminum busbar.

[0011] The positive electrode lead-out aluminum busbar is located at the positive terminal of the battery pack, and the negative electrode lead-out aluminum busbar is located at the negative terminal of the battery pack. Multiple series aluminum busbars are connected in series between multiple individual battery cells between the positive and negative terminals of the battery pack. One end of the negative electrode connecting aluminum busbar is fixedly connected to and in communication with the negative electrode lead-out aluminum busbar, and the other end of the negative electrode connecting aluminum busbar is connected to the negative electrode post fixedly installed on the outer casing. One end of the positive electrode connecting aluminum busbar is fixedly connected to and in communication with the positive electrode lead-out aluminum busbar, and the other end of the positive electrode connecting aluminum busbar is connected to the positive electrode post fixedly installed on the outer casing.

[0012] The EVA is configured in various shapes: plate-shaped EVA is laid on the neat outer surface of the battery pack, block-shaped EVA is placed between the outer shell and the battery pack, and bent EVA is placed at the four corners of the support end plate where it abuts against the outer shell.

[0013] The outer shell includes a lower bucket and an upper cover. The lower bucket has an open top and multiple buckles are provided on the edge of the open bottom. Multiple buckles are provided with multiple slots on the edge of the upper cover. The upper cover and the lower bucket are snapped together. Ventilation holes are provided on the wall of the lower bucket.

[0014] The two bucket walls opposite each other in the lower bucket are provided with horizontally protruding handles. The external handles are detachably and fixedly installed on the handles. The negative and positive terminals are fixedly installed on the upper cover. The negative and positive terminals are connected to the busbar output assembly inside the outer shell and to the electrical equipment outside the outer shell.

[0015] The control component is fixedly connected to a support end plate. The control component is driven and connected to the bus output component through the acquisition line. The main body of the control component adopts an equalization board or BMS.

[0016] The control component collects the voltage and current at the series aluminum busbar, the positive lead-out aluminum busbar, and the negative lead-out aluminum busbar via the acquisition line.

[0017] A fusion groove is provided on the positive electrode aluminum busbar.

[0018] The limiting component also includes an MPP, which is configured as a strip-shaped attachment pad placed on the bottom and side surfaces of the battery pack that mate with the casing.

[0019] Multiple riveting holes are provided on the epoxy board located between the busbar and the battery pack. The positive lead aluminum busbar, the negative lead aluminum busbar, and multiple series aluminum busbars are all fixedly connected to the epoxy board between the busbar and the battery pack by plastic rivets.

[0020] Both the positive and negative lead-out aluminum busbars are provided with connecting holes that extend through the thickness direction. The positive and negative lead-out aluminum busbars are fixedly connected to the two support end plates through the connecting holes.

[0021] Both ends of the epoxy board located between the busbar lead-out component and the battery pack are provided with cable tie holes and wire passage grooves. The wire passage grooves are used to avoid the acquisition wires, and the acquisition wires are connected to the cable tie holes by cable ties.

[0022] The beneficial effects of this invention are as follows: The starting power supply is designed to match the physicochemical properties of sodium-ion batteries, overcoming the performance degradation problem of existing batteries in low-temperature environments, improving the safety and reliability of the starting power supply, extending its service life, and enhancing the market competitiveness of the product; a control component is set in the battery module to balance and regulate the performance of multiple battery cells; an automatic overload protection mechanism is set in the battery module to improve safety and reliability; a limiting component is set in the battery module to provide better insulation, limiting and support for the battery pack, ensuring that the battery module maintains structural stability and high durability. Attached Figure Description

[0023] In the attached diagram: Figure 1 This is a disassembly diagram of the overall structure of this utility model. Figure 1 (Some limit component parts are omitted); Figure 2 This is a disassembly diagram of the overall structure of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the layout of the limiting component of this utility model; Figure 4 This is a schematic diagram illustrating the fit between the battery module and the top cover of this utility model. Figure 1 ; Figure 5 This is a schematic diagram illustrating the fit between the battery module and the top cover of this utility model. Figure 2 ; In the diagram: 1. Lower bucket; 2. Upper cover; 3. Battery module; 11. Buckle; 12. Vent hole; 13. Handle base; 21. Negative terminal; 22. Positive terminal; 30. Busbar lead-out assembly; 31. Limiting assembly; 32. Control assembly; 33. Battery pack; 301. Series aluminum busbar; 302. Positive terminal lead-out aluminum busbar; 303. Negative terminal lead-out aluminum busbar; 304. Negative terminal connecting aluminum busbar; 305. Positive terminal connecting aluminum busbar; 306. Plastic rivet; 3021. Connecting hole; 3051. Fusible groove; 311. Epoxy board; 312. EVA; 313. MPP; 314. Support end plate; 315. Fiberglass tape; 3111. Through groove; 3112. Cable tie hole; 3113. Wire passage groove; 3141. Bundling groove; 321. Data collection line; 331. Battery cell. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] A sodium-ion high-rate starting power supply includes a housing and a battery module 3 fixedly encapsulated inside the housing. A negative terminal 21 and a positive terminal 22 are fixedly disposed on the housing. The battery module 3 is connected to both the negative terminal 21 and the positive terminal 22. The battery module 3 includes a busbar assembly 30, a limiting assembly 31, a control assembly 32, and a battery pack 33. The battery pack 33 includes multiple battery strips arranged in a matrix. The busbar assembly 30 connects to the multiple battery strips. The limiting assembly 31 is disposed outside the battery pack 33 and supports and limits the battery pack 33 within the housing. The control assembly 32 is connected to the battery pack 33 through the busbar assembly 30 and performs equalization drive control on the battery module 3. Electrical devices use the starting power supply by connecting to the negative terminal 21 and the positive terminal 22.

[0026] Each battery pack includes multiple battery cells 331, each of which is a soft-pack sodium-ion battery. The multiple battery cells 331 are stacked along the thickness direction and adjacent battery cells 331 are bonded together. The tabs of each battery cell 331 are welded to the busbar lead-out assembly 30. The multiple battery packs are stacked and combined and bound together to form a battery pack 33 by fiberglass tape 315. The multiple battery cells 331 can be bonded together by hot melt adhesive or by flexible adhesives such as double-sided tape.

[0027] The limiting component 31 includes an epoxy board 311, an EVA 312, and a support end plate 314. Support end plates 314 are provided at both ends of the length direction of the battery pack 33. An epoxy board 311 is installed between the battery pack 33 and the support end plate 314. A recessed binding groove 3141 is provided in the middle of the upper end of each support end plate 314 to limit the fiberglass tape 315. Each support end plate 314 is provided with a honeycomb groove, which reduces the weight of the support end plate 314 while ensuring the structural strength of the support end plate 314 and facilitating processing and production. The end face of the support end plate 314 away from the battery cell 331 is provided with the mounting position of the control component 32.

[0028] Both sides of the battery pack 33 in the width direction are covered with epoxy boards 311. Among them, the epoxy boards 311 located on the same side as the busbar assembly 30 are spaced apart between the battery pack 33 and the busbar assembly 30. Multiple through slots 3111 are opened on the epoxy boards 311 located between the busbar assembly 30 and the battery pack 33. The tabs of each battery cell 331 pass through the through slots 3111 and are connected to the busbar assembly 30. The EVA 312 is a support pad around the battery pack 33 and is installed between the outer shell and the battery pack 33.

[0029] The support end plate 314 is made of rigid plastic materials such as PC+ABS, PA66+GF, and ABS, which have high structural strength and provide sufficient support and protection for the battery pack 33. The epoxy board 311 is made of FR4 material with a smooth surface. It covers the battery cell 331 and provides insulation and protection, preventing the battery cell 331 from being scratched by the unpolished water injection port and burrs on the injection-molded support end plate 314. Both sides of the epoxy board 311 are provided with adhesive. One side of the epoxy board 311 is bonded to the battery pack, and the other side of the epoxy board 311 is bonded to adjacent components such as the busbar lead-out assembly 30 and the support end plate 314.

[0030] The busbar leading assembly 30 includes a series aluminum busbar 301, a positive lead aluminum busbar 302, a negative lead aluminum busbar 303, a negative lead aluminum busbar 304, and a positive lead aluminum busbar 305. Each of the series aluminum busbar 301, the positive lead aluminum busbar 302, and the negative lead aluminum busbar 303 has a mounting groove. The tab of each battery cell 331 is aligned and passes through each mounting groove and is welded to the aligned series aluminum busbar 301, the positive lead aluminum busbar 302, or the negative lead aluminum busbar 303. The width of the mounting groove is greater than or equal to the width of the through groove 3111.

[0031] The positive electrode lead-out aluminum busbar 302 is disposed at the positive terminal of the battery pack 33, and the negative electrode lead-out aluminum busbar 303 is disposed at the negative terminal of the battery pack 33. Multiple series aluminum busbars 301 are connected in series between multiple battery cells 331 between the positive and negative terminals of the battery pack 33. One end of the negative electrode connecting aluminum busbar 304 is fixedly connected to and connected to the negative electrode lead-out aluminum busbar 303, and the other end of the negative electrode connecting aluminum busbar 304 is connected to the negative electrode post 21 fixedly disposed on the outer casing. One end of the positive electrode connecting aluminum busbar 305 is fixedly connected to and connected to the positive electrode lead-out aluminum busbar 302, and the other end of the positive electrode connecting aluminum busbar 305 is connected to the positive electrode post 22 fixedly disposed on the outer casing. The multiple aluminum busbars of the busbar lead-out assembly 30 can be made of aluminum or copper.

[0032] The EVA312 is configured in various shapes. Plate-shaped EVA312 is laid on the neat outer surface of the battery pack 33, block-shaped EVA312 is placed between the outer shell and the battery pack 33, and bent EVA312 is placed at the four corners of the support end plate 314 where it contacts the outer shell.

[0033] EVA312 is an insulating material with a certain degree of compressive elasticity. The setting of EVA312 provides stable insulation and support for the battery pack 33, eliminates the dimensional tolerance of the battery pack 33, prevents the battery pack 33 from moving around in the shell, and ensures that the battery pack 33 maintains a stable position in the shell. The EVA312 at the four corners of the support end plate 314 can be replaced with silicone pads. Both EVA312 and silicone pads have compressive elasticity, which can adjust the dimensional error of the battery pack 33, so that the battery module 3 can be stably located inside the shell and avoid movement. EVA312 can be CR material.

[0034] The outer shell includes a lower barrel 1 and an upper cover 2. The lower barrel 1 has an open top and multiple buckles 11 are provided on the edge of the open top. The upper cover 2 has multiple slots that fit the multiple buckles 11 on its edge. The upper cover 2 is snapped into the lower barrel 1. A vent hole 12 is provided on the barrel wall of the lower barrel 1. The vent hole 12 is used to ensure the internal pressure of the outer shell is stable and reduce the incidence of explosion accidents.

[0035] The lower bucket 1 has two horizontally protruding handles 13 on the upper edges of opposite walls. The external handles are detachably and fixedly installed on the handles 13, allowing the power supply to be moved by directly grasping the handles 13 in an emergency. The negative terminal 21 and positive terminal 22 are fixedly installed on the upper cover 2. The negative terminal 21 and positive terminal 22 are connected to the busbar output assembly 30 inside the outer shell and to the electrical equipment outside the outer shell. The lower bucket 1 and the upper cover 2 are made of ABS or PC+ABS and are flame retardant.

[0036] The control component 32 is fixedly connected to a support end plate 314. The control component 32 is connected to the busbar output component 30 via the acquisition line 321. The main body of the control component 32 adopts an equalization board or a BMS (battery management system).

[0037] Differences in manufacturing processes and operating environments among individual battery cells 331 can lead to inconsistent internal resistance and capacity, which can accelerate battery aging over time. The balancing technology of the control component 32 reduces damage to individual battery cells 331 from overcharging or over-discharging by adjusting voltage and charge state, thus extending the overall lifespan of the starting power supply. Furthermore, the total capacity of the battery pack 33 is limited by the worst-performing individual battery cell 331; the balancing technology ensures that the voltage of each individual battery cell 331 is more consistent, avoiding the "weakest link" effect and maximizing the potential of the battery pack 33. Without the control component 32, localized overheating or overvoltage may occur, leading to the risk of thermal runaway. The control component 32 dynamically adjusts energy distribution to prevent individual battery cells 331 from entering dangerous states. The control component 32 in this product uses a commercially available balancing board, specifically an active balancing board. This board utilizes inductors, capacitors, or transformers to transfer energy from high-voltage cells to low-voltage cells, resulting in high efficiency and energy savings, but also complex circuitry and higher cost.

[0038] The control component 32 collects the voltage and current at the series aluminum busbar 301, the positive lead aluminum busbar 302, and the negative lead aluminum busbar 303 via the acquisition line 321.

[0039] The positive electrode aluminum busbar 305 is provided with a fusible groove 3051. The number and size of the fusible grooves 3051 are set according to the maximum cold start current of the starting power supply. The fusible grooves 3051 can reserve an upper limit coefficient of 10-20%. Once the maximum value of the upper limit is exceeded, the positive electrode aluminum busbar 305 will automatically fuse to protect the starting power supply. This prevents short circuits between the positive and negative electrodes of the starting power supply; prevents insufficient ion migration speed in the electrodes due to discharge exceeding the design rate, resulting in increased internal resistance and a drop in voltage plateau; prevents rapid rise in battery surface temperature due to discharge exceeding the design rate, leading to the risk of thermal runaway; prevents the graphite layer of the negative electrode from cracking due to discharge exceeding the design rate, which can cause a capacity decay of up to 30% after 200 cycles; prevents the battery cycle life from being shortened due to discharge exceeding the design rate; and prevents problems such as battery overheating, sodium deposition, and SEI film growth that may occur due to discharge exceeding the design rate, increasing the risk of explosion and fire.

[0040] The positive electrode aluminum busbar 305 is provided with a fusible groove 3051, which can be replaced with a self-resetting fuse to achieve the same power protection function.

[0041] The limiting component 31 also includes MPP313, which is configured as a strip-shaped attachment pad on the bottom and side surfaces of the battery pack 33 that mate with the outer casing, to limit and support the battery pack 33. The gaps between the multiple MPP313 located on the bottom surface of the battery pack 33 are reserved for applying adhesive. The adhesive that bonds the battery pack 33 to the lower barrel 1 is filled in the gaps between the MPP313.

[0042] Multiple riveting holes are provided on the epoxy plate 311 located between the busbar assembly 30 and the battery pack 33. The positive lead aluminum busbar 302, the negative lead aluminum busbar 303 and multiple series aluminum busbars 301 are all fixedly connected to the epoxy plate 311 between the busbar assembly 30 and the battery pack 33 by plastic rivets 306.

[0043] Both the positive lead-out aluminum busbar 302 and the negative lead-out aluminum busbar 303 are provided with connecting holes 3021 that extend through the thickness direction. The positive lead-out aluminum busbar 302 and the negative lead-out aluminum busbar 303 are fixedly connected to the two support end plates 314 through the connecting holes 3021 respectively.

[0044] Both ends of the epoxy board 311 located between the busbar lead-out component 30 and the battery pack 33 are provided with cable tie holes 3112 and wire passage grooves 3113. The wire passage grooves 3113 are used to avoid the acquisition wires 321 to keep the appearance of the battery module 3 neat. The acquisition wires 321 are bundled and connected to the cable tie holes 3112 by cable ties, and the acquisition wires 321 are limited to keep the wiring stable.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sodium-electric high-rate starting power supply, characterized in that: The battery module (3) includes a housing and a battery module (3) fixedly encapsulated inside the housing. A negative terminal (21) and a positive terminal (22) are fixedly disposed on the housing. The battery module (3) is connected to both the negative terminal (21) and the positive terminal (22). The battery module (3) includes a busbar assembly (30), a limiting assembly (31), a control assembly (32), and a battery pack (33). The battery pack (33) includes multiple battery strips arranged in a matrix. The busbar assembly (30) Multiple battery packs are connected. The limiting component (31) is wrapped around the outside of the battery pack (33). The limiting component (31) supports and limits the battery pack (33) inside the shell. The control component (32) is connected to the battery pack (33) through the busbar lead-out component (30). The control component (32) performs equalization drive control on the battery module (3). The electrical equipment uses the starting power supply by connecting the negative terminal (21) and the positive terminal (22).

2. The sodium-electric high-rate starting power supply according to claim 1, characterized in that: Each of the battery packs includes multiple battery cells (331), each of the battery cells (331) is a soft-pack sodium-ion battery, the multiple battery cells (331) are stacked along the thickness direction, adjacent battery cells (331) are bonded together, the tabs of each battery cell (331) are welded to the busbar lead-out assembly (30), and the multiple battery packs are stacked and combined and bound together by fiberglass tape (315) to form a battery pack (33).

3. The sodium-electric high-rate starting power supply according to claim 2, characterized in that: The limiting component (31) includes an epoxy board (311), EVA (312), and a support end plate (314). Support end plates (314) are provided at both ends of the length direction of the battery pack (33). An epoxy board (311) is installed between the battery pack (33) and the support end plate (314). Epoxy boards (311) are also installed on both sides of the battery pack (33) in the width direction. The epoxy board (311) located on the same side as the busbar lead-out component (30) is... The EVA (312) is spaced between the battery pack (33) and the busbar assembly (30). Multiple through slots (3111) are opened on the epoxy plate (311) between the busbar assembly (30) and the battery pack (33). The tab of each battery cell (331) passes through the through slot (3111) and connects with the busbar assembly (30). The EVA (312) is a support pad around the battery pack (33) and is installed between the outer shell and the battery pack (33).

4. The sodium-electric high-rate starting power supply according to claim 3, characterized in that: The busbar leading assembly (30) includes a series aluminum busbar (301), a positive lead aluminum busbar (302), a negative lead aluminum busbar (303), a negative electrode connecting aluminum busbar (304), and a positive electrode connecting aluminum busbar (305). Each of the series aluminum busbar (301), the positive lead aluminum busbar (302), and the negative lead aluminum busbar (303) has a mounting groove. The tab of each battery cell (331) passes through each mounting groove and is welded to the corresponding series aluminum busbar (301), positive lead aluminum busbar (302), or negative lead aluminum busbar (303). The positive lead aluminum busbar (302) is located at the positive electrode of the battery pack (33). At the negative terminal, the negative lead-out aluminum busbar (303) is set at the negative terminal of the battery pack (33). Multiple series aluminum busbars (301) are connected in series between multiple battery cells (331) between the positive and negative terminals of the battery pack (33). One end of the negative electrode connecting aluminum busbar (304) is fixedly connected to the negative lead-out aluminum busbar (303) and connected to it. The other end of the negative electrode connecting aluminum busbar (304) is connected to the negative electrode post (21) fixedly set on the outer shell. One end of the positive electrode connecting aluminum busbar (305) is fixedly connected to the positive lead-out aluminum busbar (302) and connected to it. The other end of the positive electrode connecting aluminum busbar (305) is connected to the positive electrode post (22) fixedly set on the outer shell.

5. A sodium-electric high-rate starting power supply according to claim 4, characterized in that: The EVA (312) is configured in various shapes. The plate-shaped EVA (312) is laid on the neat outer surface of the battery pack (33), the block-shaped EVA (312) is padded between the outer shell and the battery pack (33), and the bent EVA (312) is padded at the four corners of the support end plate (314) where it abuts against the outer shell.

6. The sodium-electric high-rate starting power supply according to claim 5, characterized in that: The outer casing includes a lower bucket (1) and an upper cover (2). The lower bucket (1) has an open top and multiple buckles (11) are provided on the edge of the open bottom. Multiple buckles (11) are provided on the edge of the upper cover (2) to fit the upper cover (2). The upper cover (2) and the lower bucket (1) are snapped together. A vent hole (12) is opened on the wall of the lower bucket (1). A handle seat (13) is provided horizontally outward on the upper edge of the two opposite walls of the lower bucket (1). An external handle is detachably and fixedly installed on the handle seat (13). The negative terminal (21) and the positive terminal (22) are fixedly installed on the upper cover (2). The negative terminal (21) and the positive terminal (22) are connected to the busbar output assembly (30) inside the outer casing and connected to the electrical equipment outside the outer casing.

7. A sodium-electric high-rate starting power supply according to claim 6, characterized in that: The control component (32) is fixedly connected to a support end plate (314). The control component (32) is connected to the busbar output component (30) via the acquisition line (321). The main body of the control component (32) adopts an equalization board or BMS. The control component (32) acquires the voltage and current at the series aluminum busbar (301), the positive lead aluminum busbar (302) and the negative lead aluminum busbar (303) via the acquisition line (321).

8. A sodium-electric high-rate starting power supply according to claim 7, characterized in that: A fusing groove (3051) is provided on the positive electrode connecting aluminum busbar (305).

9. A sodium-electric high-rate starting power supply according to claim 8, characterized in that: The limiting component (31) also includes an MPP (313), which is configured as a strip-shaped attachment pad on the bottom and side surfaces of the battery pack (33) that mate with the outer casing.

10. A sodium-electric high-rate starting power supply according to claim 9, characterized in that: Multiple riveting holes are provided on the epoxy plate (311) located between the busbar assembly (30) and the battery pack (33). The positive electrode lead-out aluminum busbar (302), the negative electrode lead-out aluminum busbar (303), and multiple series aluminum busbars (301) are all fixedly connected to the epoxy plate (311) between the busbar assembly (30) and the battery pack (33) by plastic rivets (306). The positive electrode lead-out aluminum busbar (302) and the negative electrode lead-out aluminum busbar (303) are provided with connecting holes that penetrate the thickness direction. 3021), the positive lead aluminum busbar (302) and the negative lead aluminum busbar (303) are fixedly connected to the two support end plates (314) through the connection hole (3021). The epoxy board (311) located between the busbar assembly (30) and the battery pack (33) has cable tie holes (3112) and wire grooves (3113) at both ends. The wire grooves (3113) are used to avoid the acquisition line (321). The acquisition line (321) is tied to the cable tie hole (3112) through the cable tie.

Images