Square intelligent battery structure of transmission shaft

Abstract

The invention discloses a transmission shaft square intelligent battery structure, and relates to the technical field of intelligent batteries, the structure comprises a square battery shell, an upper bin cover, a middle bin partition plate, a lower bin cover, a sealing gasket, a buffer pad, a support ring, a shock pad, a square key groove, a BMS system, a battery pack, a glue injection heat dissipation hole, a long circular key groove, a positioning plate and a circular positioning groove; the square battery shell, the upper bin cover and the lower bin cover form a square split bin structure, the interior of the square battery shell is divided into an upper bin chamber and a lower bin chamber by the middle bin partition plate, and the upper bin cover and the positioning plate are respectively provided with a long circular key groove and synchronously rotate with the transmission shaft through a connecting key. Through the composite connection design of the upper bin long circular key, the lower bin square key and circular positioning, reliable synchronous rotation is achieved, vibration interference can be reduced, and the transmission stability is obviously better than that of a traditional annular clamp structure.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of intelligent batteries, and particularly relates to a square intelligent battery structure of a transmission shaft. BACKGROUND

[0002] With the rapid development of industry 4.0, mechanical transmission systems are evolving towards intelligentization and wireless interconnection. As a core component, the built-in sensors, controllers and other intelligent elements of the intelligent transmission shaft need stable and reliable power supply. At present, the batteries matched with the transmission shaft on the market are mostly in a circular structure, which has the following defects: first, the structure positioning of the circular battery is unreliable under the high-speed rotating condition of the transmission shaft, which easily leads to the displacement of the battery cell and causes the risk of internal short circuit; second, the circular battery has poor heat dissipation performance, and the radial positioning of the traditional circular battery only depends on a simple annular clamp without a stable anti-displacement structure. When the transmission shaft rotates at high speed, the battery cell group is easily subjected to axial movement under the action of centrifugal force, which leads to the fatigue fracture of the tab welding point and further causes the positive and negative plate contact short circuit, and even causes thermal runaway in severe cases.

[0003] Based on this, the square intelligent battery structure of the transmission shaft is provided, which can eliminate the defects of the existing device. SUMMARY

[0004] The application aims to provide a square intelligent battery structure of a transmission shaft to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: A square intelligent battery structure of a transmission shaft, comprising a square battery shell, an upper warehouse cover, a middle warehouse partition plate, a lower warehouse cover, a sealing gasket, a buffer pad, a support ring, a shock pad, a square key groove, a BMS system, a battery pack, a glue injection heat dissipation hole, an oblong key groove, a positioning plate and a circular positioning groove. The square battery shell, the upper warehouse cover and the lower warehouse cover form a square split warehouse structure, and the middle warehouse partition plate divides the inside into an upper warehouse chamber and a lower warehouse chamber.

[0006] On the basis of the above technical scheme, the application further provides the following optional technical schemes: In an optional scheme, the upper warehouse cover and the lower warehouse cover are connected and locked with the square battery shell through bolts, and the middle warehouse partition plate is adjustably arranged to adapt to different space layouts.

[0007] In an optional scheme, the upper warehouse cover and the positioning plate are both provided with an oblong key groove, and synchronous rotation is realized through a connecting key and the transmission shaft.

[0008] In an optional scheme, the lower warehouse cover is provided at the bottom with a square key groove and a circular positioning groove, which are used for positioning connection with the transmission shaft and realizing synchronous rotation.

[0009] In an alternative, the glue injection heat dissipation hole is arranged on the surface of the square battery shell, and has the functions of glue injection and heat dissipation.

[0010] In an alternative, the square battery shell, the upper warehouse cover and the lower warehouse cover are made of aluminum alloy material, and the surface of the shell is provided with a trapezoidal cross-section pattern.

[0011] In an alternative, a plurality of functional cushion layers are arranged between the upper warehouse cover and the lower warehouse cover, including a sealing pad, a buffer pad, a support pad and a shock-absorbing pad arranged in sequence from top to bottom, and the positioning plate is provided with a groove structure for mounting a sealing ring.

[0012] In an alternative, the upper warehouse cover is provided with a charging port, a lifting ring screw port, a discharging port, a BMS signal port, a power display module and a switch module, and the middle warehouse partition plate is provided with four holes for the lower warehouse battery wire outlet.

[0013] In an alternative, the BMS signal port is integrated with a signal transceiver module, including an embedded Bluetooth module and a LoRa radio station; the power display module and the switch module are embedded on the surface of the upper warehouse cover.

[0014] In an alternative, the battery pack is sealed and assembled through the middle warehouse partition plate and the lower warehouse cover, and flame-retardant organic silicon heat-conducting glue is selected as the filling medium between the middle warehouse partition plate and the lower warehouse cover.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: The square battery shell, the upper warehouse cover and the lower warehouse cover of the present application are all made of high-strength aluminum alloy material, and are formed by casting process. The trapezoidal cross-section pattern is designed on the surface of the shell, which can reduce the material consumption and reduce the overall weight (15%-20% lighter than the traditional metal shell), increase the heat dissipation area and improve the heat dissipation efficiency, and also enhance the anti-skid performance of the shell, facilitating installation and maintenance.

[0016] The present application divides the battery into an upper warehouse chamber and a lower warehouse chamber through the middle warehouse partition plate. The upper warehouse chamber integrates intelligent control elements such as BMS system and wireless communication module, and the lower warehouse chamber accommodates the battery pack, realizing physical isolation of the control module and the energy storage module and avoiding electrical interference. The middle warehouse partition plate is designed to be adjustable, and the position can be changed by moving the support to adapt to different capacity battery packs or add electrical elements, improving the structural flexibility.

[0017] The application sets sealing pads, buffer pads, supporting pads and damping pads in the upper and lower bin covers from top to bottom. The sealing pads are made of oil-resistant rubber material to ensure the sealing performance of the bin body and prevent dust and liquid from entering; the buffer pads are made of polyurethane foam material to absorb external mechanical impact; the supporting pads are made of hard plastic to provide structural rigid support; and the damping pads are made of nitrile rubber material to effectively attenuate the influence of transmission shaft vibration on internal components and ensure stable operation of the battery under high-speed rotating conditions.

[0018] The application is provided with long circular key grooves on the upper bin cover and the positioning plate, and synchronous rotation is formed through the connecting keys and the transmission shaft; the bottom of the lower bin cover is provided with square key grooves and circular positioning grooves, the circular positioning grooves are used for quick positioning and installation, and the square key grooves are used as the main transmission structure to ensure that the battery and the transmission shaft have no relative displacement. The composite connection design of "upper bin long circular key + lower bin square key + circular positioning" not only realizes reliable synchronous rotation, but also reduces vibration interference, and the transmission stability is significantly better than that of the traditional ring-shaped clamp structure. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the application.

[0020] Figure 2 It is a structural schematic diagram of the upper bin cover of the application.

[0021] Figure 3 It is a structural schematic diagram of the lower bin cover of the application.

[0022] Figure 4 It is a structural schematic diagram of the middle bin partition plate of the application.

[0023] Figure 5 It is a structural schematic diagram of the positioning plate of the application.

[0024] Figure 6 It is an internal section view of the positioning plate of the application.

[0025] Legend of the drawing: 1 square battery shell, 2 upper bin cover, 3 middle bin partition plate, 4 lower bin cover, 5 sealing pad, 6 buffer pad, 7 supporting pad, 8 damping pad, 9 square key groove, 10 BMS system, 11 battery pack, 12 glue injection heat dissipation hole, 13 charging port, 14 lifting ring screw port, 15 discharging port, 16 BMS signal port, 17 power display module, 18 switch module, 19 long circular key groove, 20 positioning plate, 21 circular positioning groove, 22 flame-retardant organic silicone heat-conducting glue. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the application is further described in detail below in combination with the drawings and examples.

[0027] In one embodiment, asFigures 1-6 As shown, a drive shaft square intelligent battery structure includes a square battery shell 1, an upper compartment cover 2, a middle compartment partition plate 3, a lower compartment cover 4, a sealing gasket 5, a buffer pad 6, a support ring 7, a shock pad 8, a square key groove 9, a BMS system 10, a battery pack 11, a glue injection heat dissipation hole 12, a long circular key groove 19, a positioning plate 20, and a circular positioning groove 21. The square battery shell 1, the upper compartment cover 2, and the lower compartment cover 4 form a square split compartment structure, and the middle compartment partition plate 3 divides the interior into an upper compartment and a lower compartment.

[0028] In one embodiment, the upper compartment cover 2 and the lower compartment cover 4 are connected and locked with the square battery shell 1 by bolts; the middle compartment partition plate 3 can be adjusted and arranged to adapt to different space layouts.

[0029] In one embodiment, the upper compartment cover 2 and the positioning plate 20 are each provided with a long circular key groove 19, which is connected with the drive shaft to realize synchronous rotation.

[0030] In one embodiment, the lower compartment cover 4 is provided at the bottom with a square key groove 9 and a circular positioning groove 21, which are used for positioning connection with the drive shaft and realizing synchronous rotation.

[0031] In one embodiment, the glue injection heat dissipation hole 12 is arranged on the surface of the square battery shell 1, which has the functions of glue injection and heat dissipation, and is used for heat dissipation after glue injection is completed.

[0032] In one embodiment, the square battery shell 1, the upper compartment cover 2, and the lower compartment cover 4 are made of aluminum alloy material, and the surface of the shell is provided with a trapezoidal cross-section texture.

[0033] In one embodiment, a plurality of functional pad layers are arranged between the upper compartment cover 2 and the lower compartment cover 4, including the sealing gasket 5, the buffer pad 6, the support pad 7, and the shock pad 8 arranged in sequence from top to bottom, and the positioning plate 20 is provided with a groove structure for installing a sealing ring.

[0034] In one embodiment, the upper compartment cover 2 is provided with a charging port 13, a lifting ring screw port 14, a discharging port 15, a BMS signal port 16, a power display module 17, and a switch module 18, and the middle compartment partition plate 3 is provided with four holes for the lower compartment battery to output lines.

[0035] In one embodiment, the BMS signal port 16 is integrated with a signal transceiver module, including an embedded Bluetooth module and a LoRa radio station; the power display module 17 and the switch module 18 are embedded on the surface of the upper compartment cover 2.

[0036] In one embodiment, the battery pack 11 is sealed and assembled with the lower compartment cover 4 through the middle compartment partition plate 3, and a flame-retardant organic silicone heat-conducting glue 22 is selected as a filling medium between the middle compartment partition plate 3 and the lower compartment cover 4.

[0037] Example 1: Shell and cover processing: The shell 1, upper cover 2 and lower cover 4 of the square battery are made of 6061 aluminum alloy material and formed by die casting process. After forming, the surface is treated by anodic oxidation to enhance corrosion resistance. The height of the trapezoidal cross-section texture on the surface of the shell is 2mm, and the top angle is 60°, which not only ensures the structural strength, but also maximizes the heat dissipation area.

[0038] Double-warehouse structure assembly: First, the middle-warehouse partition plate 3 is made of 304 stainless steel material with a thickness of 3mm and is installed inside the square battery shell 1 through adjustable supports. The adjustment range of the support is 50-100mm, and the height of the upper and lower warehouse chambers can be adjusted according to the capacity requirements of the battery pack 11. Then, the upper cover 2 and the lower cover 4 are connected and locked with the shell through M8 stainless steel bolts. The tightening torque of the bolts is 25N•m to ensure the sealing performance of the warehouse body.

[0039] Cell assembly: The lower warehouse chamber uses 3.7V / 100Ah square lithium iron phosphate cells, which are stacked in a 3-string 4-parallel matrix to form a battery pack 11. A 1mm thick aluminum nitride ceramic insulation partition plate is arranged between the cells. The cell tabs are connected with copper busbars through laser welding with a welding power of 150W and a welding speed of 5mm / s to form an equipotential network. After welding, the module outside is bundled and reinforced with flame-retardant electrician tape with a temperature resistance level of 150℃.

[0040] Example 2: Upper warehouse synchronous connection: The positioning plate 20 is made of aluminum alloy material with a thickness of 5mm and is fixed inside the upper cover 2 through bolts to ensure that the long circular key groove 19 of the positioning plate 20 is completely aligned with the long circular key groove 19 of the upper cover 2. The connecting key of the transmission shaft is embedded in the aligned long circular key groove 19 to realize the synchronous rotation of the upper warehouse and the transmission shaft. The key groove clearance is controlled within 0.05-0.1mm to avoid shaking during operation.

[0041] Lower warehouse positioning and transmission: The circular positioning groove 21 at the bottom of the lower cover 4 cooperates with the positioning protrusion of the transmission shaft to realize quick positioning. At the same time, the square key of the transmission shaft is embedded in the square key groove 9 of the lower cover 4. The square key and the key groove adopt a clearance fit tolerance level of H7 / h6 to ensure stable torque transmission and realize the synchronous rotation of the battery whole and the transmission shaft without relative displacement.

[0042] Example 3: Glue injection operation: The glue injection hole 12 on the surface of the square battery shell 1 has a hole diameter of 8mm and a tapered structure with a large end diameter of 12mm. The flame-retardant organic silicon heat-conducting glue with a thermal conductivity of ≥1.5W / (m•K) and a temperature resistance range of -40℃-200℃ is injected into the lower warehouse. The pressure control is 0.2MPa during injection to ensure that the heat-conducting glue fully penetrates into the cell gap without air bubble residue. After the glue injection is completed, it is left to stand for 24h until the heat-conducting glue is completely cured.

[0043] The heat dissipation system is composed of: the cured heat-conducting glue forms a full-wrapping heat-conducting layer to conduct the heat of the battery cell to the square battery shell 1; the glue injection hole 12 serves as a heat dissipation hole after the glue injection is completed, and together with the four wire outlet holes of the middle compartment partition plate 3 with a hole diameter of 6 mm, forms a distributed heat dissipation channel; the trapezoidal lines of the aluminum alloy shell further increase the heat dissipation area, and the heat is dissipated to the environment through natural convection and thermal radiation; under the working condition of the transmission shaft rotating at a speed of 3000 r / min, the maximum temperature of the battery pack can be controlled within 45°C.

[0044] Example 4: BMS system installation: fix the BMS system 10 including the voltage acquisition module, the temperature acquisition module, and the charge and discharge control module in the upper compartment, connect the positive and negative poles of the battery pack 11 through wires respectively, and paste the temperature sensor on the surface of the battery cell with an accuracy of ±0.5°C; connect the signal output end of the BMS system with the signal transceiver module at the BMS signal port 16, integrate the embedded Bluetooth module with a communication distance of ≤10 m and the LoRa radio communication frequency of 433 MHz and the transmission rate of 1200 bps.

[0045] Human-computer interaction module assembly: embed the power display module 17 LCD digital tube with a display accuracy of 1% and the switch module 18 boat-shaped switch with a rated current of 10 A on the surface of the upper compartment cover 2, and connect them with the BMS system 10 through wires; the power display module 17 displays the battery capacity percentage in real time, and the switch module 18 can manually cut off the battery power supply to realize the emergency power-off function.

[0046] Example 5: Sealing performance test: test the IP69K protection level of the assembled battery, spray water at 80°C and 8000kPa water pressure for 30s, and there is no water entering the inside; place it in a dust environment with a dust concentration of 50g / m 3 for 24h, and there is no dust intrusion inside, verifying the sealing effect of the sealing gasket 5 and the sealing ring of the positioning plate 20.

[0047] Vibration resistance test: install the battery on the transmission shaft, run it under the working condition of rotating at a speed of 3000 r / min and vibration acceleration of 10g for 100h, the voltage fluctuation of the battery pack is ≤0.1V, the data transmission integrity rate of the BMS system is 100%, there is no battery cell displacement or electrical connection failure, verifying the shock absorption effect and structural stability of the buffer pad 6 and the shock absorbing pad 8.

[0048] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A square type intelligent battery structure for a drive shaft, characterized by, The square battery shell (1), the upper warehouse cover (2), the middle warehouse partition (3), the lower warehouse cover (4), the sealing gasket (5), the buffer pad (6), the support ring (7), the shock pad (8), the square key groove (9), the BMS system (10), the battery pack (11), the glue injection heat dissipation hole (12), the oblong key groove (19), the positioning plate (20), the circular positioning groove (21). The square battery shell (1), the upper warehouse cover (2), the middle warehouse partition (3), the lower warehouse cover (4), the sealing gasket (5), the buffer pad (6), the support ring (7), the shock pad (8), the square key groove (9), the BMS system (10), the battery pack (11), the glue injection heat dissipation hole (12), the oblong key groove (19), the positioning plate (20), the circular positioning groove (21).

2. The square type intelligent battery structure of a drive shaft according to claim 1, characterized in that, The upper warehouse cover (2) and the lower warehouse cover (4) are connected and locked with the square battery shell (1) through bolts; the middle warehouse partition (3) is adjustably arranged at the middle position of the battery to adapt to different space layouts.

3. The square type intelligent battery structure of a drive shaft according to claim 1, characterized in that, The upper warehouse cover (2) and the positioning plate (20) are both provided with oblong key grooves (19) for synchronous rotation with the transmission shaft through connecting keys.

4. The square type intelligent battery structure of a drive shaft according to claim 1, wherein, The lower warehouse cover (4) is provided with a square key groove (9) and a circular positioning groove (21) at the bottom for positioning connection with the transmission shaft and realizing synchronous rotation.

5. The square type intelligent battery structure of a drive shaft according to claim 1, characterized in that, The glue injection heat dissipation hole (12) is arranged on the surface of the square battery shell (1) and has the functions of glue injection and heat dissipation, and is used for heat dissipation after glue injection.

6. The square type intelligent battery structure of a drive shaft according to claim 1, wherein, The square battery shell (1), the upper warehouse cover (2) and the lower warehouse cover (4) are made of aluminum alloy, and the surface of the shell is provided with a trapezoidal cross-section pattern.

7. The square type intelligent battery structure of a drive shaft according to claim 1, wherein, The upper warehouse cover (2) and the lower warehouse cover (4) are provided with multiple functional pad layers, including the sealing gasket (5), the buffer pad (6), the support pad (7) and the shock pad (8) arranged from top to bottom, and the positioning plate (20) is provided with a groove structure for mounting a sealing ring.

8. The square type intelligent battery structure of a drive shaft according to claim 1, wherein, The upper warehouse cover (2) is provided with a charging port (13), a lifting ring screw port (14), a discharging port (15), a BMS signal port (16), a power display module (17) and a switch module (18), and the middle warehouse partition (3) is provided with four holes for the lower warehouse battery to output lines.

9. The square type intelligent battery structure of a drive shaft according to claim 8, characterized in that, The BMS signal port (16) is integrated with a signal transceiver module, including an embedded Bluetooth module and a LoRa radio station; the power display module (17) and the switch module (18) are embedded on the surface of the upper warehouse cover (2).

10. The square type intelligent battery structure of a drive shaft according to claim 1, wherein, The battery pack (11) is sealed and assembled with the lower warehouse cover (4) through the middle warehouse partition (3), and the middle warehouse partition (3) and the lower warehouse cover (4) are filled with flame-retardant organic silicone heat-conducting glue 22 as the filling medium.

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