A starting lithium battery pack for vehicles
Patent Information
- Application Number
- CN202522133153.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-09
AI Technical Summary
[0004]本实用新型的目的在于克服现有技术中的不足，提供一种车用启动锂电池包，解决了现有锂电池包适配性低、尺寸固定且难以适应低温工作环境的问题
[0013]与现有技术相比，本实用新型所达到的有益效果：电芯单元采用圆柱电芯、连接片、电芯支架的组合排布方式，可以实现多种容量规格的灵活切换，从而适配不同体积的安装空间；并通过在连接片上叠焊加厚铝排而增加车用启动锂电池包的过流能力，同时通过在电芯单元与电芯单元之间及电芯模块外周增设加热膜，使得本技术方案中的车用启动锂电池包在低温作业环境中时，可以通过加热膜进行加热，避免电芯模块因长时间处于低温环境而无法使用。
Smart Images
Figure CN224908203U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of starting power technology, specifically relating to a vehicle starting lithium battery pack. Background Technology
[0002] Vehicle starting systems rely on a starter battery to provide a large instantaneous current, driving the starter motor to start the engine. Currently, the mainstream automotive starter batteries on the market are still lead-acid batteries.
[0003] With the development of lithium battery technology, some automotive starting batteries have begun to adopt lithium batteries. However, existing automotive starting lithium battery packs still have many shortcomings: First, the installation space for starting batteries varies greatly among different vehicle models, and existing lithium battery packs are mostly of fixed size, resulting in low installation adaptability; Second, maintenance is inconvenient, as the cell module and casing are mostly integrated designs, and the failure of a single cell requires replacement of the entire unit, leading to high maintenance costs; Third, the overcurrent capacity is poor, making it prone to instantaneous insufficient current that leads to starting failure; Fourth, lithium batteries experience significant capacity decay at low temperatures, resulting in poor environmental adaptability. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vehicle starting lithium battery pack that solves the problems of low adaptability, fixed size and difficulty in adapting to low temperature working environment of existing lithium battery packs.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a vehicle starting lithium battery pack, including a detachable and assembleable injection-molded shell with a cell mounting cavity, wherein a cell module is embedded in the cell mounting cavity, and the outer periphery of the cell module is clearance-fitted with the inner wall of the cell mounting cavity; The battery cell module includes a mounting plate, a control board disposed on the mounting plate, and a plurality of battery cell units connected in parallel and electrically connected to the control board. The cell unit includes several cylindrical cells connected in parallel by connecting pieces and two sets of cell supports for clamping and fixing the cylindrical cells. Thickened aluminum busbars are welded on the connecting pieces. The cell units are connected in parallel with each other through aluminum connecting busbars. A heating film electrically connected to the control board is provided in the gap between the battery cell units and in the gap between the outer periphery of the battery cell module and the inner wall of the battery cell placement cavity.
[0006] Optionally, the mounting plate is provided with a nut post that matches the injection-molded housing.
[0007] Optionally, the mounting plate is a sheet metal part, and the surface of the mounting plate is provided with a PC insulating layer.
[0008] Optionally, the receiving holes on the cell support for embedding the end of the cylindrical cell are arranged in a honeycomb-like staggered pattern.
[0009] Optionally, the thickness of the heating film is 0.15 mm to 0.3 mm.
[0010] Optionally, the cylindrical cell is a lithium iron phosphate battery cell.
[0011] Optionally, the injection-molded housing includes an injection-molded bottom shell and an upper cover that can be sealed to the top opening of the injection-molded bottom shell, and an electrode post that can be electrically connected to the control board is sealed to the upper cover.
[0012] Optionally, the mounting plate has folded edges on its four periphery that can support it against the inner wall of the injection-molded bottom shell.
[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: the battery cell unit adopts a combination arrangement of cylindrical battery cells, connecting pieces, and battery cell brackets, which can realize flexible switching of various capacity specifications, thereby adapting to different installation spaces; and the current carrying capacity of the vehicle starting lithium battery pack is increased by stacking and welding thickened aluminum busbars on the connecting pieces. At the same time, by adding heating films between battery cell units and on the outer periphery of the battery cell module, the vehicle starting lithium battery pack in this technical solution can be heated by the heating film in low-temperature operating environments, preventing the battery cell module from becoming unusable due to prolonged exposure to low temperatures. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0015] Figure 1 This is a schematic diagram of the structure of the vehicle starting lithium battery pack in a preferred embodiment of this utility model; Figure 2 This is an exploded structural diagram of the vehicle starting lithium battery pack in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the battery cell module in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the preferred embodiment of the present invention when the cell support is clamped and fixed at both ends of the cylindrical cell; Figure 5 This is a schematic diagram of the connecting piece in a preferred embodiment of the present invention; The components include: 1. Injection-molded bottom shell; 2. Top cover; 3. Electrode post; 4. Mounting plate; 401. Nut post; 402. Folded edge; 5. Control board; 6. Connecting piece; 601. Thickened aluminum busbar; 7. Cylindrical battery cell; 8. Battery cell bracket; 9. Aluminum connecting busbar; 10. Heating film. Detailed Implementation
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0017] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1
[0018] like Figures 1-5 As shown, a vehicle starting lithium battery pack includes a detachable, assembled, injection-molded outer shell with a cell mounting cavity 101. A cell module is embedded within the cell mounting cavity 101, and the outer periphery of the cell module is clearance-fitted with the inner wall of the cell mounting cavity 101, meaning the size and specifications of the cell module match the cell mounting cavity 101. The cell module includes a mounting plate 4, a control board 5 mounted on the mounting plate 4, and several cell units connected in parallel and electrically connected to the control board 5. Specifically, the control board 5 can be fixedly mounted on the mounting plate 4 by bolts, adhesive, or other methods. The battery cell unit includes several cylindrical batteries 7 connected in parallel by connecting pieces 6 and two sets of battery cell brackets 8 for clamping and fixing the cylindrical batteries 7. A thickened aluminum busbar 601 is welded onto the connecting piece 6 to enhance its current carrying capacity. The battery cell units are connected in parallel by aluminum connecting busbars 9. The aluminum connecting busbars 9 can be increased in volume to match the current carrying capacity of the connecting pieces 6 and the thickened aluminum busbars 601, thereby replacing the traditional flexible copper busbars and reducing costs. Furthermore, in this technical solution, heating films 10 electrically connected to the control board 5 are provided in the gaps between battery cell units and between the outer periphery of the battery cell module and the inner wall of the battery cell mounting cavity 101. This allows the battery cell module to be heated by the heating films 10 when in a low-temperature operating environment, preventing the battery cell module from becoming unusable due to prolonged exposure to low temperatures.
[0019] It is important to note that the injection-molded housing in this technical solution is the same size as existing automotive starter batteries, perfectly matching the original vehicle's mounting holes and allowing for non-destructive installation without altering the original vehicle structure. Furthermore, the cell bracket 8 and connecting piece 6 in this technical solution utilize common components from existing technologies. The connecting piece 6 can be electrically connected to the terminals of the cylindrical cell 7 using various connection methods, including but not limited to laser welding, ultrasonic welding, and resistance welding. This allows the cell module in this technical solution to not only flexibly switch between various capacities and adjust its size according to the specifications of the injection-molded housing, but also maintain structural stability before the cell module is installed into the cell mounting cavity 101.
[0020] Meanwhile, in this embodiment, the cylindrical cell 7 is a lithium iron phosphate battery cell with high stability and low heat generation. Furthermore, the receiving holes on the cell support 8 for embedding the ends of the cylindrical cell 7 are arranged in a honeycomb-like staggered pattern. Compared to the traditional cell support 8 with parallel arranged receiving holes, the honeycomb-like staggered arrangement of the receiving holes not only increases space utilization but also provides more stable support and protection for the cylindrical cell 7.
[0021] Furthermore, in this embodiment, the thickness of the heating film 10 is 0.15mm to 0.3mm, so that when the battery module accumulates heat due to charging and discharging at room temperature, the heat can be effectively transferred to the injection molded shell through the thinner heating film 10, so that the heat can be dissipated through the injection molded shell.
[0022] In this embodiment, as Figure 1 , Figure 2 As shown, the injection-molded housing includes an injection-molded bottom shell 1 and a top cover 2 that can be sealed to the top opening of the injection-molded bottom shell 1. Specifically, the joint between the injection-molded bottom shell 1 and the top cover 2 can be sealed using detachable connection methods such as sealing ring compression, threaded connection + sealant / gasket, or snap-fit + sealing ring. This ensures the waterproof and dustproof performance of the automotive starting lithium battery pack and facilitates the maintenance of the cell modules. Similarly, the top cover 2 can also be sealed with electrode posts 3 that can be electrically connected to the control board 5 using sealing connection methods including but not limited to those mentioned above. This facilitates the indirect connection of the automotive starting lithium battery pack in this technical solution to the existing vehicle infotainment system and provides basic power support to the vehicle infotainment system. Example 2
[0023] like Figures 1-5 As shown, based on Embodiment 1, the mounting plate 4 is provided with a nut post 401 that matches the injection molded shell. The nut post 401 is a copper fastener in the prior art, and its thread strength can effectively reduce the probability of stripping when the mounting plate 4 and the injection molded shell are fastened together by bolts.
[0024] Furthermore, in this embodiment, the mounting plate 4 can be made of sheet metal, and the nut post 401 can be directly pressed and riveted. This not only ensures the structural strength of the mounting plate 4, but also reduces the cost of raw materials and processing. It should be noted that a layer of PC insulation layer needs to be pasted on the surface of the sheet metal mounting plate 4 to ensure that the mounting plate 4 has reliable insulation.
[0025] Meanwhile, the mounting plate 4, which is made of sheet metal, can be provided with folded edges 402 around its four periphery to support the inner wall of the injection molded bottom shell 1, so as to increase the stability of the mounting plate 4 when it is placed in the cell placement cavity 101.
[0026] Working Principle: By using an injection-molded shell compatible with existing vehicle models as the housing of the automotive starting lithium battery pack in this technical solution, non-destructive installation can be achieved without damaging the original vehicle structure. Simultaneously, the use of universal cell brackets 8 and connecting pieces 6 as the main frame of the cell module not only allows for flexible switching between various capacities and size adjustments according to the specifications of the injection-molded shell, but also maintains structural stability before the cell module is installed into the cell mounting cavity 101. The current-carrying capacity of the automotive starting lithium battery pack is increased by stacking and welding thickened aluminum busbars 601 onto the connecting pieces 6. Furthermore, by adding heating films 10 between cell units and around the cell module, the automotive starting lithium battery pack in this technical solution can be heated by the heating films 10 in low-temperature operating environments, preventing the cell module from becoming unusable due to prolonged exposure to low temperatures.
[0027] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A vehicle starting lithium battery pack, comprising a detachable, assembled injection-molded housing with a cell mounting cavity (101), characterized in that: A battery cell module is embedded in the battery cell mounting cavity (101), and the outer periphery of the battery cell module is in clearance fit with the inner wall of the battery cell mounting cavity (101); The battery cell module includes a mounting plate (4), a control board (5) disposed on the mounting plate (4), and a plurality of battery cell units that are connected in parallel and electrically connected to the control board (5); The cell unit includes several cylindrical cells (7) connected in parallel via connecting pieces (6) and two sets of cell supports (8) for clamping and fixing the cylindrical cells (7). Thickened aluminum busbars (601) are stacked on the connecting pieces (6). The cell units are connected in parallel via aluminum connecting busbars (9). A heating film (10) electrically connected to the control board (5) is provided in the gap between the battery cell units and in the gap between the outer periphery of the battery cell module and the inner wall of the battery cell placement cavity (101).
2. The automotive starting lithium battery pack according to claim 1, characterized in that: The mounting plate (4) is provided with a nut post (401) that matches the injection-molded shell.
3. The automotive starting lithium battery pack according to claim 1, characterized in that: The mounting plate (4) is a sheet metal part, and the surface of the mounting plate (4) is provided with a PC insulation layer.
4. The automotive starting lithium battery pack according to claim 1, characterized in that: The receiving holes on the cell support (8) for embedding the end of the cylindrical cell (7) are arranged in a honeycomb-like staggered pattern.
5. The automotive starting lithium battery pack according to claim 1, characterized in that: The thickness of the heating film (10) is 0.15 mm to 0.3 mm.
6. The automotive starting lithium battery pack according to claim 1, characterized in that: The cylindrical cell (7) is a lithium iron phosphate battery cell.
7. The automotive starting lithium battery pack according to claim 1, characterized in that: The injection-molded housing includes an injection-molded bottom shell (1) and an upper cover (2) that can be sealed to the top opening of the injection-molded bottom shell (1), and an electrode post (3) that can be electrically connected to the control board (5) is sealed to the upper cover (2).
8. The automotive starting lithium battery pack according to claim 7, characterized in that: The mounting plate (4) has folded edges (402) on its four periphery that can support the inner wall of the injection molded bottom shell (1).