Composite lithium iron phosphate anode energy storage battery
By introducing components such as protective shells, sealing sleeves, and dampers into lithium iron phosphate batteries, the risks of reduced sealing performance and short circuits caused by vibration have been resolved, resulting in higher safety and stability.
Patent Information
- Application Number
- CN202423098696.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The waterproof casing of existing lithium iron phosphate batteries is prone to loosening during prolonged use, leading to a decrease in sealing performance and a risk of short circuits or thermal runaway in the vibration environment of a car.
The composite lithium iron phosphate cathode energy storage battery design includes components such as a protective shell, protective cover, sealing ring, screws, sealing sleeve, spring, and damper. The threaded connection between the screws and the sealing sleeve and the buffer structure of the spring enhance the sealing performance and absorb vibration shock, reducing the risk of short circuit.
It improves the battery's sealing and vibration resistance, reduces the risk of short circuits and thermal runaway, and enhances the battery's safety and reliability.
Smart Images
Figure CN223680249U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to energy storage battery technical field especially relates to composite lithium iron phosphate positive pole energy storage battery. BACKGROUND
[0002] The automobile start-stop system is a technology used in modern cars to improve fuel efficiency and reduce emissions. When the vehicle stops, the engine will automatically shut down; when it needs to start, the engine will start quickly. During this process, the start-stop power supply needs to have the ability of fast charging and discharging, so high-rate batteries are often used.
[0003] Among the types of batteries, lithium iron phosphate batteries with positive electrode materials have high energy density, long life, wide temperature range, and high safety. In electric hybrid cars and automobile start-stop systems, composite lithium iron phosphate positive pole energy storage batteries are widely used due to their excellent performance. Especially in the start-stop system that needs frequent charging and discharging, this battery can provide stable and efficient power support.
[0004] In order to avoid the corrosion of water vapor and other factors to lithium iron phosphate battery, the lithium iron phosphate battery is sealed by setting a waterproof shell, and the sealing ring is usually set between the cover and the shell of the existing waterproof shell for sealing. However, due to the fixation of the cover and the shell by screws, the screws are easily loosened by external vibration and environmental influence during long-term use, which causes the gap between the cover and the shell to expand, affecting the sealing and waterproof effect. In addition, the existing automobile lithium iron phosphate energy storage battery lacks effective protection mechanism when installed in the car interior, and the vehicle body vibrates, which causes the lithium iron phosphate energy storage battery to be easily impacted under load generation state, leading to short circuit or thermal runaway risk. Therefore, in view of the above problems, the composite lithium iron phosphate positive pole energy storage battery is proposed to solve the above problems. SUMMARY
[0005] In order to make up for the above shortcomings, the utility model provides a composite lithium iron phosphate positive pole energy storage battery, which aims to improve the poor sealing of the lithium iron phosphate battery protection shell and the problem that the lithium iron phosphate battery is easily damaged by external impact after installation.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] The utility model provides a compound lithium iron phosphate positive pole energy storage battery, including the protection shell, the protection cover and four screws, the outside fixed connection of top of protection shell is connected with the sealing ring, the inside fixed connection of protection shell is connected with a plurality of heat conduction sheets, the inside of protection shell is provided with battery pack, the top four corners of battery pack all are equipped with the mouthpiece, the inside slide connection of mouthpiece is equipped with the sealing sleeve, the outside of sealing sleeve is equipped with spring no.
[0008] As a further description of the above technical solution:
[0009] The buffer assembly includes a spring sheet, the top left and right sides of the spring sheet are fixedly connected to the proximal side of the spring no.
[0010] As a further description of the above technical solution:
[0011] The inside of the protection cover is fixedly connected with a clamping block, and the outer thread of the screw is connected to the inner wall of the clamping block.
[0012] As a further description of the above technical solution:
[0013] The outer thread of the screw is connected to the inner wall of the sealing sleeve, and the outer surface of the sealing ball is engaged with the inner wall of the sealing sleeve.
[0014] As a further description of the above technical solution:
[0015] The rear end of the spring no. 1 is fixedly connected to the inner wall of the mouthpiece, and the bottom of the protection cover is engaged with the top of the protection shell.
[0016] As a further description of the above technical solution:
[0017] The top left and right sides of the spring sheet are slideably connected to the inner wall of the limiting box, the protection cover is arranged outside the damper, the inner sleeve is arranged outside the damper, the top of the spring no. 3 is fixedly connected to the bottom of the protection shell, and the top of the spring no. 3 is fixedly connected to the top of the spring sheet.
[0018] As a further description of the above technical solution:
[0019] The bottom end of the inner sleeve is fixedly connected in the middle of the top end of the spring sheet, and mounting holes are formed in the top end of the mounting plate.
[0020] As a further description of the above technical solution:
[0021] The outer part of the protective shell is provided with two connecting heads, and the outer part of the protective shell is provided with a temperature sensor.
[0022] The utility model has the advantages of:
[0023] 1. In the utility model, the sealing sleeve in the four corners of the protective cover is screwed with the clamping block of the protective shell, which prevents water from entering the screw and causing corrosion, thereby ensuring the sealing of the lithium iron phosphate positive electrode energy storage battery and ensuring the waterproof effect of the lithium iron phosphate positive electrode energy storage battery.
[0024] 2. In the utility model, after the battery is installed, the spring three and the damper cooperate to partially absorb the impact on the bottom end of the protective shell, and the spring two and the spring sheet assist the spring three to buffer the impact, thereby providing an additional protection layer, reducing the risk of short circuit or thermal runaway caused by external force, and further improving the safety of the battery. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 The utility model provides a three-dimensional schematic view of the composite lithium iron phosphate positive electrode energy storage battery.
[0026] Figure 2 The utility model provides an explosion view of the battery pack of the composite lithium iron phosphate positive electrode energy storage battery.
[0027] Figure 3 The utility model provides a structure schematic view of the temperature sensor of the composite lithium iron phosphate positive electrode energy storage battery.
[0028] Figure 4 For Figure 3 The enlarged view of A in the middle.
[0029] Figure 5 The utility model provides a structure schematic view of the screw of the composite lithium iron phosphate positive electrode energy storage battery.
[0030] Figure 6 The utility model provides a structure schematic view of the damper of the composite lithium iron phosphate positive electrode energy storage battery.
[0031] Figure 7 The utility model provides a structure schematic view of the spring sheet of the composite lithium iron phosphate positive electrode energy storage battery.
[0032] LEGEND:
[0033] 1, protective shell; 2, sealing ring; 3, heat conduction sheet; 4, battery pack; 5, protective cover; 6, mouth; 7, sealing sleeve; 8, spring one; 9, clamping block; 10, connecting block; 11, sealing ball; 12, screw; 13, limiting box; 14, spring two; 15, spring sheet; 16, protective sleeve; 17, inner sleeve; 18, damper; 19, spring three; 20, mounting plate; 21, mounting hole; 22, connecting head; 23, temperature sensor. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0035] Referring to Figures 1 to 3 , the present application provides an embodiment: a composite lithium iron phosphate positive electrode energy storage battery, which comprises a protective shell 1, the protective shell 1 is a container structure in the shape of a rectangular parallelepiped and is made of a solid material. The protective cover 5 and the four screws 12, the bottom end of the protective cover 5 is engaged with the top end of the protective shell 1, the protective cover 5 is covered on the top end of the protective shell 1 and is engaged with the protective shell 1 to form a closed space together, protecting the battery pack 4.
[0036] The top end of the protective shell 1 is externally fixedly connected with a sealing ring 2, the sealing ring 2 is fixedly connected to the top end of the protective shell 1, when the protective cover 5 is engaged with the protective shell 1, the sealing ring 2 plays a sealing role, preventing moisture and dust from entering the interior of the protective shell 1. The interior of the protective shell 1 is fixedly connected with a plurality of heat conduction sheets 3, the heat conduction sheets 3 are fixed in the interior of the protective shell 1, and the heat conduction sheets 3 conduct the heat generated by the battery pack 4 during operation, improving the heat dissipation performance of the battery. The interior of the protective shell 1 is provided with a battery pack 4, the battery pack 4 is composed of a structure of a plurality of battery monomers, and the shape is determined according to the internal space of the protective shell 1.
[0037] Reference Figure 3 , Figure 4The top four corners of the battery pack 4 are provided with through holes 6, which provide mounting positions for sealing sleeves 7 and screws 12. The sealing sleeves 7 are slidably connected inside the through holes 6 and have a cylindrical structure and are made of sealing materials such as rubber. The screws 12 are externally threaded to the inner walls of the sealing sleeves 7. When the screws 12 are tightened, the sealing sleeves 7 are deformed and pressed to seal the positions of the through holes 6, preventing moisture from entering around the screws 12 and avoiding rust and corrosion of the screws 12. The sealing sleeves 7 are externally sleeved with springs 8, which have a spiral structure. The rear ends of the springs 8 are fixedly connected to the inner walls of the through holes 6. When the screws 12 are tightened, the springs 8 provide a certain elastic pressure for the sealing sleeves 7 to enhance the sealing effect. The front sides of the sealing sleeves 7 are fixedly connected with connecting blocks 10, and the inner four corners of the protective shell 1 are fixedly connected with clamping blocks 9. The outer threads of the screws 12 are connected to the middle inner walls of the clamping blocks 9. The clamping blocks 9 and the screws 12 cooperate to fix the protective cover 5 on the protective shell 1.
[0038] Reference Figure 5 The front sides of the connecting blocks 10 are fixedly connected with sealing balls 11, which are externally engaged with the inner walls of the sealing sleeves 7. After the screws 12 are completely fixed, the sealing balls 11 are inserted into the sealing sleeves 7 to further seal the sealing sleeves 7. The protective shell 1 is externally provided with two connecting heads 22 for connecting external circuits to realize the charging and discharging functions of the battery. The protective shell 1 is externally provided with a temperature sensor 23 for real-time monitoring of the temperature of the battery to take appropriate protective measures when the temperature is too high.
[0039] Reference Figure 6 , Figure 7 The bottom ends of the protective shell 1 are fixedly connected with two limiting boxes 13, which provide limiting spaces for the sliding of spring sheets 15. The limiting boxes 13 are internally fixedly connected with multiple springs 14. Opposite sides of the springs 14 are provided with buffer assemblies for protecting the energy storage battery. The springs 14 absorb part of the pressure and provide elastic force after the vibration is weakened to help the protective shell 1 reset. The buffer assemblies include spring sheets 15, the top ends of which are slidably connected to the inner walls of the limiting boxes 13. The top ends of the spring sheets 15 are fixedly connected to the opposite sides of the springs 14. When the car shakes, the spring sheets 15 transmit the vibration source to the springs 14 and the buffer assemblies, and deform themselves to absorb part of the pressure. The bottom ends of the protective shell 1 are fixedly connected with protective sleeves 16 on the front and rear sides. The protective sleeves 16 are externally sleeved with dampers 18, which provide sliding spaces for inner sleeves 17 and protect the dampers 18 and springs 19.
[0040] The inner sleeve 17 is slidably connected in the protective sleeve 16, the bottom end of the inner sleeve 17 is fixedly connected to the middle of the top end of the spring sheet 15, the inner sleeve 17 is sleeved on the outside of the damper 18, and the inner sleeve 17 slides in the protective sleeve 16. When vibration occurs, the inner sleeve 17 is compressed together with the damper 18 and the spring three 19 to absorb the pressure. The bottom end of the protective shell 1 is fixedly connected with the damper 18 on the front and rear sides, the damper 18 consumes part of the energy through the damping effect, and reduces the influence of vibration on the battery. The outer part of the damper 18 is sleeved with the spring three 19, the top end of the spring three 19 is fixedly connected to the bottom end of the protective shell 1 on the front and rear sides, the top end of the spring three 19 is fixedly connected to the middle of the top end of the spring sheet 15, and the spring three 19 absorbs the vibration pressure together with the damper 18, and provides elastic force after the vibration is weakened, helping the protective shell 1 to reset. The bottom end of the spring sheet 15 is fixedly connected with the mounting plate 20, the top end of the mounting plate 20 is provided with mounting holes 21 at four corners, and the battery is mounted on the automobile at a suitable position through the mounting holes 21.
[0041] Working principle: in use, first, the battery pack 4 is assembled, then the battery pack 4 is placed in the protective shell 1 and fixed, then the protective cover 5 is covered on the top end of the protective shell 1 and clamped, then the screw 12 is threaded in the sealing sleeve 7 in the four-corner through hole 6 of the protective cover 5, the screw 12 is screwed in the sealing sleeve 7 and the clamping block 9 by using a screwdriver, so that the screw 12 extrudes the sealing sleeve 7 to deform and seal the position of the through hole 6, and the screw 12 installs and fixes the protective cover 5 and the protective shell 1, finally, after the screw 12 is completely fixed, the sealing ball 11 is inserted into the sealing sleeve 7 to seal the sealing sleeve 7, preventing moisture from entering around the screw 12, causing the screw 12 to rust, corrode and loosen, and realizing effective sealing and installation of the battery.
[0042] After the composite lithium iron phosphate positive electrode energy storage battery pack 4 is assembled, the battery is mounted on the automobile at a suitable position through the mounting holes 21 of the mounting plate 20. If a large vibration occurs when the automobile is jolted, the vibration source will be transmitted to the spring sheet 15 through the mounting plate 20, extruding the spring sheet 15 to expand and slide in the limiting box 13 and extrude the spring two 14, at the same time, the inner sleeve 17 fixed in the middle of the spring sheet 15 will be compressed together with the damper 18 and the spring three 19 in the protective sleeve 16 to absorb the pressure, then through the elastic force of the spring two 14, the spring sheet 15, the damper 18 and the spring three 19, the protective shell 1 is reset, thereby reducing the influence of the vibration source on the inside of the battery and preventing the risk of short circuit or thermal runaway caused by external force.
[0043] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. A composite lithium iron phosphate positive electrode energy storage battery comprising a protective casing (1), a protective cover (5) and four screws (12), characterized in that: The top end of the protective shell (1) is externally fixedly connected with a sealing ring (2), the inside of the protective shell (1) is fixedly connected with a plurality of heat-conducting fins (3), the inside of the protective shell (1) is provided with a battery pack (4), the top end of the battery pack (4) is provided with a through hole (6) at each corner, the inside of the through hole (6) is slidably connected with a sealing sleeve (7), the outside of the sealing sleeve (7) is sleeved with a spring (8), the front side of the sealing sleeve (7) is fixedly connected with a connecting block (10), the front side of the connecting block (10) is fixedly connected with a sealing ball (11), the bottom end of the protective shell (1) is fixedly connected with two limiting boxes (13), the inside of the limiting box (13) is fixedly connected with a plurality of springs (14), and the buffer assembly for protecting the energy storage battery is arranged on the side close to the spring (14).
2. The composite lithium iron phosphate cathode energy storage battery of claim 1, wherein: The buffer assembly comprises spring sheets (15), the top end of the spring sheet (15) is fixedly connected on the side close to the spring (14) on the left and right sides, the bottom end of the protective shell (1) is fixedly connected with a protective sleeve (16) on the front and rear sides, the inside of the protective sleeve (16) is slidably connected with an inner sleeve (17), the bottom end of the protective shell (1) is fixedly connected with a damper (18) on the front and rear sides, the outside of the damper (18) is sleeved with a spring (19), and the bottom end of the spring sheet (15) is fixedly connected with a mounting plate (20).
3. The composite lithium iron phosphate cathode energy cell of claim 1, wherein: The inside of the protective shell (1) is fixedly connected with a clamping block (9) at each corner, and the outside of the screw (12) is threadedly connected to the inner wall of the clamping block (9).
4. The composite lithium iron phosphate cathode energy cell of claim 1, wherein: The outside of the screw (12) is threadedly connected to the inner wall of the sealing sleeve (7), and the outside of the sealing ball (11) is clamped with the inner wall of the sealing sleeve (7).
5. The composite lithium iron phosphate cathode energy cell of claim 1, wherein: The rear end of the spring (8) is fixedly connected to the inner wall of the through hole (6), and the bottom end of the protective cover (5) is clamped with the top end of the protective shell (1).
6. The composite lithium iron phosphate cathode energy cell of claim 2, wherein: The top end of the spring sheet (15) is slidably connected to the inner wall of the limiting box (13) on the left and right sides, the protective sleeve (16) is sleeved on the outside of the damper (18), the inner sleeve (17) is sleeved on the outside of the damper (18), the top end of the spring (19) is fixedly connected to the bottom end of the protective shell (1) on the front and rear sides, and the top end of the spring (19) is fixedly connected to the top end of the spring sheet (15) in the middle.
7. The composite lithium iron phosphate cathode energy cell of claim 2, wherein: The bottom end of the inner sleeve (17) is fixedly connected to the top end of the spring sheet (15) in the middle, and the top end of the mounting plate (20) is provided with a mounting hole (21) at each corner.
8. The composite lithium iron phosphate cathode energy cell of claim 1, wherein: The outside of the protective shell (1) is provided with two connecting heads (22), and the outside of the protective shell (1) is provided with a temperature sensor (23).