Lithium iron phosphate starting power supply
By assembling a cell pack using all-tab low-temperature lithium iron phosphate cells, and combining it with a PI heating film and a temperature control and GPS positioning module of the battery management system, the problems of insufficient discharge capacity and monitoring of lithium iron phosphate starting power supplies in low-temperature environments are solved, achieving efficient and safe power management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU OPTIMUMNANO ENERGY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-26
AI Technical Summary
Existing lithium iron phosphate starter power supplies suffer from insufficient discharge capacity due to increased internal resistance at low temperatures. They also lack effective thermal management mechanisms and positioning functions, making it difficult to meet users' needs for efficient start-up and real-time monitoring.
The battery pack is composed of low-temperature lithium iron phosphate cells with all tabs connected in parallel or series. It is combined with a PI heating film and a battery management system for temperature control, an integrated GPS positioning module for real-time location tracking, and an insulated enclosure for protection.
It can stably output current in low-temperature environments, avoid the risk of lithium plating, improve the adaptability and safety of the power supply environment, provide intelligent management methods, and ensure electrical safety and structural stability.
Smart Images
Figure CN224417798U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of vehicle starting power supply, specifically relating to a lithium iron phosphate starting power supply. Background Technology
[0002] The field of vehicle starting power has long relied on lead-acid batteries. However, traditional lead-acid starting batteries have problems such as low energy density, poor low-temperature performance, and short cycle life. In low-temperature environments, their starting ability drops significantly, making it difficult to meet the needs of modern vehicles for efficient starting power.
[0003] While existing lithium iron phosphate starter batteries have improved energy density and cycle life, they still have significant drawbacks: increased internal resistance at low temperatures leads to insufficient discharge capacity, they lack effective thermal management mechanisms to ensure the safety of low-temperature charging and discharging, and they do not integrate positioning functions, making it difficult to meet users' needs for real-time monitoring of battery status.
[0004] Therefore, there is an urgent need for a startup power supply solution that combines low-temperature discharge, intelligent temperature control, and positioning management functions. Utility Model Content
[0005] To address the aforementioned problems in the existing technology, this utility model provides a lithium iron phosphate starting power supply. The technical problem to be solved by this utility model is achieved through the following technical solution:
[0006] This utility model provides a lithium iron phosphate starting power supply, comprising: a cell assembly including multiple all-tab low-temperature lithium iron phosphate cells, which are connected in series or parallel and electrically connected to a battery management system; a PI heating film, which is attached to the outer surface of the cell assembly and is tightly bonded to the cell assembly via thermally conductive silicone; the PI heating film is electrically connected to the battery management system and is used to heat the cell assembly under the control of the battery management system; a GPS positioning module, integrated outside the cell assembly, for acquiring the location information of the lithium iron phosphate starting power supply and uploading it to a remote processing device; and an insulating housing, in which the cell assembly, the battery management system, the PI heating film, and the GPS positioning module are all housed, the insulating housing being a sheet metal structure with both inner and outer sides powder-coated for insulation.
[0007] In one embodiment of this utility model, the all-tab low-temperature lithium iron phosphate cells are all cylindrical cells, which are connected in series or in parallel to form a cell group.
[0008] In one embodiment of this utility model, a pressure relief valve is provided inside the battery cell assembly for relieving pressure on the battery cell assembly.
[0009] In one embodiment of this utility model, the battery pack includes 8 series and 13 parallel fully tabbed low-temperature lithium iron phosphate battery cells, and the rated voltage of the battery pack is 25.6V and the capacity is 201Ah.
[0010] In one embodiment of this utility model, the protection level of the insulating box is IP67, and the surface of the insulating box is provided with a plurality of copper-plated nickel poles, and the surface of each copper-plated nickel pole is covered with an insulating sheath.
[0011] In one embodiment of this utility model, the battery management system is equipped with a temperature sensor. When the temperature sensor detects that the ambient temperature is lower than a set threshold, it controls the PI heating film to start. The set threshold is set according to the operating temperature requirements of the battery cell assembly.
[0012] In one embodiment of this utility model, when the ambient temperature is below 0°C, the battery management system first controls the PI heating film to heat the battery cell assembly until the temperature of the battery cell assembly reaches 5°C, and then controls the battery cell assembly to start charging and discharging.
[0013] In one embodiment of this utility model, the GPS positioning module adopts dual-mode positioning of Beidou and GPS, and transmits location information to a remote processing device through a wireless data network.
[0014] In one embodiment of this utility model, the GPS positioning module employs an electronic fence and an abnormal movement alarm to trigger an alarm when the lithium iron phosphate power supply exceeds a preset range or undergoes abnormal movement.
[0015] In one embodiment of this utility model, the two ends of the battery cell assembly are fixed to the inner wall of the insulating box by end plates, and the battery management system is fixed to one section of the end plate.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] This utility model's lithium iron phosphate starting power supply significantly reduces internal resistance by using a cell assembly composed of all-tab low-temperature cells, enabling stable current output even in low-temperature environments and solving the problem of insufficient low-temperature discharge capacity of traditional batteries. The coordinated control of the PI heating film and the battery management system achieves precise temperature management, initiating heating and optimizing the charging and discharging process in low-temperature environments, effectively avoiding the risk of lithium plating and performance degradation, and greatly improving the power supply's environmental adaptability and safety. Simultaneously, the integrated GPS positioning module supports real-time location tracking, providing users with intelligent management tools and addressing the lack of status monitoring in existing technologies. Furthermore, the sheet metal structure and powder-coated insulation design of the insulated enclosure ensure overall protective reliability, guaranteeing electrical safety and structural stability under complex operating conditions.
[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of a lithium iron phosphate starting power supply provided in an embodiment of this utility model;
[0020] Figure 2 This is a top view of the lithium iron phosphate starting power supply provided in this embodiment of the utility model;
[0021] Figure 3 This is a side view of the structure of the lithium iron phosphate starting power supply provided in this embodiment of the utility model.
[0022] Icons: 1-Cell pack; 11-Pressure relief valve; 2-Battery management system; 3-PI heating film; 4-Insulating housing; 5-Copper-plated nickel electrode; 6-End plate. Detailed Implementation
[0023] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description of a lithium iron phosphate starting power supply based on this utility model is provided in conjunction with the accompanying drawings and specific embodiments.
[0024] The foregoing and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of the specific embodiments with reference to the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding can be gained of the technical means and effects adopted by this utility model to achieve the intended purpose. However, the accompanying drawings are only provided for reference and illustration and are not intended to limit the technical solution of this utility model.
[0025] Example 1
[0026] Taking a low-temperature environment of -30℃ as an example, ordinary lithium iron phosphate batteries cannot output sufficient instantaneous high current, which cannot meet the starting requirements of fuel vehicles; at the same time, due to the lack of precise temperature control and real-time location monitoring methods, it is difficult to meet the diverse and refined usage needs of users.
[0027] like Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the structure of a lithium iron phosphate starting power supply provided in an embodiment of this utility model; Figure 2 This is a top view of the lithium iron phosphate starting power supply provided in this embodiment of the utility model; Figure 3This is a side view of the structure of the lithium iron phosphate starting power supply provided in this embodiment of the utility model.
[0028] In this embodiment, a lithium iron phosphate (LFP) starting power supply includes: a cell assembly 1, a battery management system 2, a PI heating film 3, a GPS positioning module, and an insulating housing 4. The cell assembly 1 includes multiple all-tab low-temperature LFP cells, which are connected in series or parallel and electrically connected to the battery management system 2. The PI heating film 3 is attached to the outer surface of the cell assembly 1 and is tightly bonded to the cell assembly 1 via thermally conductive silicone. The PI heating film 3 is electrically connected to the battery management system 2 and is used to heat the cell assembly 1 under the control of the battery management system 2. The GPS positioning module is integrated outside the cell assembly 1 and is used to acquire the location information of the LFP starting power supply and upload it to a remote processing device. The cell assembly 1, battery management system 2, PI heating film 3, and GPS positioning module are all housed within the insulating housing 4, which is a sheet metal structure with both inner and outer sides powder-coated for insulation.
[0029] In an optional embodiment, a pressure relief valve 11 is provided inside the cell assembly 1 to relieve pressure. When the internal pressure of the cell assembly 1 reaches a certain pressure range, such as when the internal pressure is ≥1.5MPa, the pressure relief valve 11 opens to release pressure. After the pressure decreases, the pressure relief valve 11 closes. The pressure relief valve 11 prevents expansion or thermal runaway caused by overpressure inside the cell assembly 1, thereby improving overall safety and reliability. For example, the all-tab low-temperature lithium iron phosphate cells are all cylindrical cells, which are connected in series or parallel to form the cell assembly 1. Through its unique all-tab structure, it significantly shortens the current conduction path, making the cell internal resistance less than 1.8 milliohms, and can instantly withstand a discharge rate of 6~8C, meeting the instantaneous high current discharge requirements of 900~1400A for gasoline vehicles under low-temperature conditions. Specifically, cell group 1 consists of 8 series-connected and 13 parallel-connected full-tab low-temperature lithium iron phosphate cells. The rated voltage of cell group 1 is 25.6V and the capacity is approximately 201Ah.
[0030] In one optional embodiment, the insulating enclosure 4 has an IP67 protection rating, and its surface is provided with multiple copper-plated nickel terminals 5, each of which is covered with an insulating sheath. Exemplarily, the insulating enclosure 4 serves as the main structural carrier of the lithium iron phosphate starting power supply, and it is also equipped with structural components, such as liquid coolant inlet / outlet plugs, fire sprinklers, battery positive and negative terminal plugs, communication plugs, and explosion-proof valves, etc., on multiple sides of the insulating enclosure 4.
[0031] In one optional implementation, the battery management system 2 is equipped with a temperature sensor. When the temperature sensor detects that the ambient temperature is lower than a set threshold, it controls the PI heating film 3 to start. The set threshold is set according to the operating temperature requirements of the cell assembly 1. Specifically, the battery management system 2 has a real-time monitoring function, capable of collecting key parameters such as voltage, current, and temperature of the cell assembly 1. When the ambient temperature is below 0°C, the battery management system 2 first controls the PI heating film 3 to heat the cell assembly 1 until its temperature reaches 5°C, and then controls the cell assembly 1 to start discharging. By optimizing the charging and discharging process, the risk of lithium plating during low-temperature charging is effectively avoided, extending the service life and improving environmental adaptability. In addition, the battery management system 2 also integrates multiple protection mechanisms such as overcurrent, overvoltage, and overtemperature protection. Once an abnormal condition occurs in the cell assembly 1, the circuit can be quickly cut off, ensuring the safety of battery use in all aspects.
[0032] In one optional embodiment, a PI heating film 3 (Polyimide) is tightly bonded to the outer surface of the cell assembly 1. The PI heating film 3 possesses characteristics such as high temperature resistance, excellent flexibility, and uniform heating, with a power density of 134 W / m² and a thickness of only 0.3 mm. Under the precise control of the battery management system 2, when the ambient temperature is below 0°C, the PI heating film 3 immediately starts working and continuously heats the cell assembly to above 5°C to avoid the risk of lithium plating. In extreme low-temperature environments of -30°C, the temperature of the cell assembly 1 can be raised to above -15°C within 20 minutes, ensuring the discharge performance of the cell assembly 1 in low-temperature environments.
[0033] In one optional implementation, the GPS positioning module is built into the insulating housing 4, fixed within the space of the insulating housing 4 outside the battery cell assembly 1. It employs dual-mode positioning using both BeiDou and GPS (Global Positioning System), and also supports AGPS (Assisted Global Positioning System) for assisted positioning. Location information is transmitted to a remote processing device via a wireless data network. The GPS positioning module achieves a positioning accuracy of within 5 meters, with static power consumption controlled to ≤20μA. The GPS positioning module continuously acquires the location information of the lithium iron phosphate power supply in real time and can upload the data to a cloud platform via a 4G / 5G module. Furthermore, users can conveniently view the battery's real-time location and historical trajectory via a mobile app. The GPS positioning module also employs electronic fences and abnormal movement alarms to trigger an alarm when the lithium iron phosphate power supply exceeds a preset range or undergoes abnormal movement. When the lithium iron phosphate power supply exceeds the preset electronic fence range or abnormal movement is detected, alarm information is promptly pushed to the user via the built-in wireless communication module of the GPS positioning module, achieving intelligent anti-theft and remote management.
[0034] In one optional embodiment, the insulating housing 4 adopts a sheet metal structure with an IP67 protection rating. The housing is equipped with M8 threaded terminals made of nickel-plated copper. The surface of the nickel-plated copper terminals 5 is covered with a UL94V-0 grade insulating sheath. The tensile strength of the nickel-plated copper terminals 5 is ≥1500N, capable of withstanding a 1600A instantaneous high-current surge, fully ensuring the safety and stability of the battery under various complex operating environments.
[0035] In an optional embodiment, the end plate 6 is made of sheet metal and is used to fix the cell assembly 1 and the battery management system 2. For example, the screw holes on the end plates 6 at both ends of the cell assembly 1 are fixed to the welded nuts of the fixing beams on the insulating housing 4 by screws, thereby fixing the cell assembly 1 to the inner wall of the insulating housing 4. The battery management system 2 is fixed to one section of the end plate 6. The end plates 6 prevent component displacement or vibration damage, ensuring that the lithium iron phosphate starting power supply remains stable under movement or impact, enhancing durability and long-term reliability.
[0036] Taking a specific structure of a lithium iron phosphate starting power supply as an example, the assembly and operation process of the lithium iron phosphate starting power supply of this utility model is as follows:
[0037] During the manufacturing process, 15.5Ah full-tab cryogenic cells are first assembled by welding in a strict 8-series, 13-parallel configuration. These cells are then arranged in parallel with a vertical spacing of 40mm and a horizontal spacing of 69.3mm to form cell assembly 1. Next, a PI heating film 3 is tightly bonded to the outer surface of cell assembly 1 using thermally conductive silicone to ensure good thermal conductivity. Then, the assembled cell assembly 1, battery management system 2, and GPS positioning module are installed into a sheet metal insulating housing 4, and the circuit connections for each component are completed. Copper-plated nickel terminals 5 are installed inside the insulating housing 4 and covered with an insulating sheath. After assembly, the lithium iron phosphate starting power supply undergoes comprehensive performance testing to ensure it meets the predetermined design requirements. In actual use, users can view the battery status and location information in real time via a mobile app. In low-temperature environments, the battery management system 2 automatically controls the PI heating film 3 to ensure the normal and efficient operation of the lithium iron phosphate starting power supply.
[0038] This utility model's lithium iron phosphate starting power supply significantly reduces internal resistance by using a cell assembly composed of all-tab low-temperature cells, enabling stable current output even in low-temperature environments and solving the problem of insufficient low-temperature discharge capacity of traditional batteries. The coordinated control of the PI heating film and the battery management system achieves precise temperature management, initiating heating and optimizing the charging and discharging process in low-temperature environments, effectively avoiding the risk of lithium plating and performance degradation, and greatly improving the power supply's environmental adaptability and safety. Simultaneously, the integrated GPS positioning module supports real-time location tracking, providing users with intelligent management tools and addressing the lack of status monitoring in existing technologies. Furthermore, the sheet metal structure and powder-coated insulation design of the insulated enclosure ensure overall protective reliability, guaranteeing electrical safety and structural stability under complex operating conditions.
[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not expressly listed. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device comprising said element. Terms such as "connected" or "linked" are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect. The orientations or positional relationships indicated by terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.
[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A lithium iron phosphate starting power supply, characterized by, include: The battery pack consists of multiple full-tab low-temperature lithium iron phosphate cells, which are connected in series or in parallel to each other and then electrically connected to the battery management system. A PI heating film is attached to the outer surface of the battery cell assembly, and the PI heating film is tightly attached to the battery cell assembly through thermally conductive silicone; the PI heating film is electrically connected to the battery management system and is used to heat the battery cell assembly under the control of the battery management system; A GPS positioning module, integrated outside the battery cell assembly, is used to acquire the location information of the lithium iron phosphate starting power supply and upload it to a remote processing device. An insulating enclosure is provided, in which the battery cell assembly, the battery management system, the PI heating film, and the GPS positioning module are all housed. The insulating enclosure is made of sheet metal and has powder-coated insulating powder on both the inner and outer sides.
2. The lithium iron phosphate startup power supply of claim 1, wherein, The all-tab low-temperature lithium iron phosphate cells are all cylindrical cells, which are connected in series or parallel to form cell groups.
3. The lithium iron phosphate startup power supply of claim 1, wherein, The battery cell assembly is equipped with a pressure relief valve for relieving pressure on the battery cell assembly.
4. The lithium iron phosphate startup power supply of claim 1, wherein, The cell assembly comprises 8 series-connected and 13 parallel-connected full-tab low-temperature lithium iron phosphate cells, with a rated voltage of 25.6V and a capacity of 201Ah.
5. The lithium iron phosphate starting power supply according to claim 1, characterized in that, The insulation enclosure has an IP67 protection rating, and the surface of the insulation enclosure is provided with multiple copper-plated nickel poles, each of which is covered with an insulating sheath.
6. The lithium iron phosphate starting power supply according to claim 1, characterized in that, The battery management system is equipped with a temperature sensor. When the temperature sensor detects that the ambient temperature is lower than a set threshold, it controls the PI heating film to start. The set threshold is set according to the operating temperature requirements of the battery cell assembly.
7. The lithium iron phosphate starting power supply according to claim 1, characterized in that, When the ambient temperature is below 0°C, the battery management system first controls the PI heating film to heat the battery cell assembly until the temperature of the battery cell assembly reaches 5°C, and then controls the battery cell assembly to start charging and discharging.
8. The lithium iron phosphate starting power supply according to claim 1, characterized in that, The GPS positioning module uses dual-mode positioning of Beidou and GPS, and transmits location information to remote processing equipment through a wireless data network.
9. The lithium iron phosphate starting power supply according to claim 1, characterized in that, The GPS positioning module employs electronic fences and abnormal movement alarms to issue an alarm when the lithium iron phosphate power supply exceeds a preset range or undergoes abnormal movement.
10. The lithium iron phosphate starting power supply according to claim 1, characterized in that, The two ends of the battery cell assembly are fixed to the inner wall of the insulating box via end plates, and the battery management system is fixed to one section of the end plate.