Ex-service vehicle-mounted power battery pack convenient for echelon utilization

Abstract

The invention provides an ex-service vehicle-mounted power battery pack convenient for echelon utilization, and belongs to the technical field of batteries, the ex-service vehicle-mounted power battery pack comprises a frame and a battery module, the inner wall of the frame is slidably connected with a bearing plate, and the battery module is fixed with the bearing plate through bolts; the surface of the bearing plate is provided with a heat dissipation assembly used for conducting local heat dissipation treatment on heat generated when the battery module works. Through the arranged heat dissipation assembly, when local overheating occurs in the charging, discharging or running process of the battery module, heat can be quickly conducted to a memory alloy spring through a heat conduction sheet, so that the spring deforms to drive a sliding sheet to move, a first heat dissipation hole is communicated with a second heat dissipation hole, and external air is introduced to form a convection channel; targeted heat dissipation and cooling of a local high-temperature area are achieved, the overall temperature of the battery module is kept stable and appropriate, and adverse effects of local overheating on the performance and the service life of the battery are reduced.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a retired vehicle-mounted power battery pack that is convenient for cascade utilization. Background Art

[0002] With the development of industries such as electric vehicles, on-board power battery packs still have a certain residual value after the original vehicle reaches a certain service life or mileage. Because they still have high energy storage performance, low cost, and environmental protection, they are ideal choices for the energy supply system of search and rescue equipment. Therefore, they are considered for cascade utilization in search and rescue work. For example, in the post-earthquake search and rescue process, retired battery packs are used to power search and rescue vehicles, so that the reliability and continuous operation capability of search and rescue equipment are guaranteed. However, there is still a heat dissipation problem in the cascade utilization process. Although the original vehicle has a heat dissipation design, in new application scenarios, such as the frequent start and stop of the rescue vehicle due to the harsh search and rescue environment, long-term low-speed driving and load changes, etc., the battery heating situation is very different from that of the original vehicle, and the battery pack performance declines during cascade utilization. Aging and repeated use reduce the efficiency of the internal chemical reaction, increase the internal resistance, and generate more heat during charging and discharging. Therefore, the present application provides a retired on-board power battery pack that is easy to reuse to meet the needs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a retired vehicle-mounted power battery pack that is easy to be recycled in order to solve the problem that when the existing retired vehicle-mounted power battery packs are recycled in different scenarios, they face different driving conditions such as load, which causes the battery heating conditions to be very different from that of the original vehicles, and the battery packs perform poorly during recycling, and aging and repeated use reduce the efficiency of internal chemical reactions, increase internal resistance, and generate more heat during charging and discharging.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A retired vehicle-mounted power battery pack that is easy to recycle comprises a frame and a battery module, wherein the inner wall of the frame is slidably connected with a bearing plate, the battery module is fixed to the bearing plate by bolts, and a heat dissipation component for locally dissipating heat generated by the battery module when in operation is installed on the surface of the bearing plate; the heat dissipation component comprises a support plate, the support plate is fixedly arranged on the surface of the bearing plate, a plurality of first heat dissipation holes are opened on the outer side of the bearing plate, a plurality of heat conducting sheets are fixedly arranged on the outer side of the battery module, a guide cylinder is fixedly arranged on the surface of the heat conducting sheet, a memory alloy spring is fixedly arranged on the inner wall of the guide cylinder, a guide groove is opened on one side of the guide cylinder, a sliding sheet is fixedly arranged on one end of the memory alloy spring, a plurality of second heat dissipation holes are opened on the sliding sheet, and the sliding sheet is slidably connected to the bearing plate through a sliding groove.

[0005] Optionally, a plurality of protrusions are equidistantly arranged on one side of the support plate close to the sliding sheet, and a plurality of grooves are equidistantly arranged on one side of the sliding sheet close to the support plate.

[0006] Optionally, the inner wall of the frame is further provided with a vibration reduction assembly for reducing vibration of the battery module, the vibration reduction assembly includes a vibration reduction device, the vibration reduction device is fixedly arranged on the inner wall of the frame, one end of the vibration reduction device is fixed to the bottom of the supporting plate, a plurality of springs are fixedly arranged on the inner wall of the frame, one end of the spring is fixed to the bottom of the supporting plate, an avoidance groove is opened on one side of the frame, a rotating plate is rotatably arranged on the inner wall of the avoidance groove, a downward pressure rod is fixedly arranged on the bottom of the supporting plate, and the downward pressure rod is rotatably connected to the rotating plate through an axle pin; exhaust holes are equidistantly opened on both sides of the support plate, and the frame is close to the rotating plate A plurality of support bars are fixedly arranged on one side of the frame, the support bar is provided with a first sliding groove, a tank body is fixedly arranged on one side of the frame close to the support bar, a piston is slidably arranged on the inner wall of the tank body, a piston rod is fixedly arranged on the surface of the piston, a second sliding groove is provided on the rotating plate, the outer side wall of the piston rod is slidably connected to the inner walls of the first sliding groove and the second sliding groove respectively, an end of the tank body away from the piston rod is connected to an air inlet pipe, an end of the tank body away from the piston rod is connected to an air outlet pipe, two hoses are respectively connected to the outside of the air outlet pipe, and the two hoses respectively pass through the frame and are fixed to the inner wall of the support plate.

[0007] Optionally, a detection module for detecting the performance of the battery module is installed on the battery module, and the detection module includes an internal resistance detection unit, a capacity detection module, a self-discharge rate detection unit, a cycle life test unit, a power characteristic detection module and a charge and discharge efficiency detection unit.

[0008] Optionally, the inner walls of the air inlet pipe and the air outlet pipe are both provided with one-way valves.

[0009] Optionally, the ends of the two hoses away from the air outlet pipe are both configured in a conical shape.

[0010] Optionally, a battery interface is installed on a side of the battery module close to the detection module.

[0011] Optionally, a cover plate is fixedly connected to the surface of the support plate by bolts.

[0012] Optionally, a sealing ring is fixed to a side of the sliding sheet close to the bearing plate.

[0013] Optionally, the heat conducting sheet is made of copper, and the contact surface between the heat conducting sheet and the battery module is coated with thermal grease.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, through the heat dissipation component, when local overheating occurs during the charging, discharging or operation of the battery module, the heat can be quickly transferred to the memory alloy spring through the heat conductive sheet, so that the deformation of the spring drives the sliding sheet to move, so that the first heat dissipation hole is connected with the second heat dissipation hole, and the external air is introduced to form a convection channel, so as to achieve targeted heat dissipation and cooling of the local high-temperature area, maintain the overall temperature of the battery module stable and appropriate, and reduce the adverse effects of local overheating on battery performance and life.

[0015] When the temperature of the battery module drops, the memory alloy spring recovers its deformation, driving the sliding plate to reset, so that the sliding plate groove fits with the first heat dissipation hole, forming a relatively sealed barrier to prevent external air from entering, avoiding excessive heat dissipation that causes the battery module temperature to be too low, ensuring that the battery operates stably in an appropriate temperature range and maintaining stable and long-lasting performance.

[0016] It can also effectively block external cold air from entering the area where the battery modules are located, preventing the battery modules from dropping in temperature due to the invasion of the external low temperature environment, thereby ensuring that the battery modules can always maintain a suitable temperature range during operation, minimizing the negative impact of temperature drop on the working efficiency of the battery modules.

[0017] By setting the protrusions and grooves, during the temperature change process of charging and discharging of the battery module, the deformation of the memory alloy spring is used to drive the structural interaction between the sliding plate and the support plate to generate vibration, so that the first heat dissipation hole and the second heat dissipation hole automatically shake off the dust due to the vibration, without the need for additional manual or complex mechanical devices to perform dust removal operations, reducing maintenance costs and workload.

[0018] Moreover, no matter whether the battery module is in the heating stage when working or in the cooling stage after stopping working, the dust removal operation can be performed automatically and effectively, adapting to various operating conditions of the battery module and enhancing the adaptability of the entire heat dissipation system.

[0019] Through the vibration reduction assembly, the synergistic effect of the shock absorber and the spring can effectively buffer the vibration transmitted to the battery module when the vehicle is driving on bumpy roads or complex road conditions, reduce the relative displacement or friction between the electrode material and the current collector inside the battery, prevent damage to the electrode structure, reduce the increase in battery internal resistance caused by vibration, and maintain the normal charging and discharging efficiency of the battery.

[0020] The up and down sliding of the load-bearing plate during the vibration reduction process can also be used to drive the rotation of the lower pressure rod and the rotating plate to achieve automatic air circulation. When the load-bearing plate slides down, air is sucked into the tank body, and when it slides up, the air in the tank body is discharged and introduced into the support plate through a hose, forming a circulating airflow, accelerating the flow and exchange of air around the battery module, improving the heat dissipation efficiency, and keeping the battery module in a good heat exchange environment at all times, ensuring effective heat dissipation under various working conditions, maintaining a suitable working temperature, and reducing the impact of overheating on battery performance and life.

[0021] The circulating airflow can not only dissipate heat, but also blow away the dust accumulated near the first heat dissipation hole and the second heat dissipation hole due to vibration, so that it can be discharged through the exhaust holes, thereby maintaining the cleanliness of the support plate, avoiding dust accumulation that affects the heat dissipation performance, and reducing maintenance costs and frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0023] Figure 1 Schematic diagram of the overall structure of retired vehicle power battery packs for cascade utilization; Figure 2 Another perspective diagram of the overall retired vehicle power battery pack for cascade utilization; Figure 3 Schematic diagram of the cooling assembly and detection module of retired vehicle power battery packs for cascade utilization; Figure 4 Schematic diagram of the carrier plate, support plate and battery module of retired vehicle power battery pack for cascade utilization; Figure 5 for Figure 4 The enlarged structural diagram at A in the middle; Figure 6 Schematic diagram of the carrier plate and battery module of retired vehicle power battery pack for cascade utilization; Figure 7 for Figure 6 The enlarged structural diagram at B in the middle; Figure 8 Schematic diagram of the load plate, support plate and heat conducting sheet of the retired vehicle power battery pack for cascade utilization; Fig. 9 for Figure 8 The enlarged structural diagram at C in the middle; Fig.10 Schematic diagram of the springs, shock absorbers and sliding plates of retired vehicle power battery packs for cascade utilization; Fig.11 Schematic diagram of the tank, support plate and first heat dissipation hole of the retired vehicle power battery pack for facilitating cascade utilization; Fig.12 Schematic diagram of the tank, piston and piston rod of retired vehicle power battery pack for cascade utilization; Fig.13 Schematic diagram of the avoidance groove, support bar and rotating plate of the retired vehicle power battery pack to facilitate the cascade utilization; Fig.14Schematic diagram of the guide tube, heat conductive plate and memory alloy spring of retired vehicle power battery pack for easy recycling.

[0024] Reference numerals: 1. Frame; 2. Battery module; 3. Loading plate; 4. Heat dissipation assembly; 401. Support plate; 402. First heat dissipation hole; 403. Heat conductive sheet; 404. Guide cylinder; 405. Memory alloy spring; 406. Guide groove; 407. Sliding sheet; 408. Second heat dissipation hole; 5. Protrusion; 6. Groove; 7. Vibration reduction assembly; 701. Shock absorber; 702. Spring; 703. Avoidance groove; 704. Rotating plate; 705. Pressing rod; 706. Exhaust hole; 707. Support bar; 708. First sliding groove; 709. Tank body; 710. Piston; 711. Piston rod; 712. Second sliding groove; 713. Inlet pipe; 714. Hose; 8. Detection module; 9. Battery interface; 10. Cover plate; 11. Exhaust pipe.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0026] The following is a detailed description of a retired vehicle-mounted power battery pack that is convenient for cascade utilization provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0027] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0028] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0029] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0030] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0031] like Figures 1 to 4As shown, an embodiment of the present invention provides a retired vehicle-mounted power battery pack that is convenient for cascade utilization, including a frame 1 and a battery module 2, wherein a detection module for detecting the performance of the battery module 2 is installed on the battery module 2, and the detection module equipped on the battery module 2 performs multi-dimensional detection on its performance, and the internal resistance detection unit detects the internal resistance of the battery through a specific signal, and calculates the value according to Ohm's law. Since the internal resistance is related to many battery properties, the unit can provide key data for battery health assessment, and the capacity detection module uses a constant current discharge method or a coulomb meter method to determine the actual capacity, and its data is helpful for planning battery use and charging plans, and provides a basis for cascade utilization, etc. The self-discharge rate detection unit will be fully charged The self-discharge rate is calculated by measuring the remaining power of the charged battery after it has been left stationary for a specific period of time. The result can guide the battery storage strategy to reduce the impact of self-discharge. The cycle life test unit simulates the cycle condition according to the preset charge and discharge system, and collects multiple performance indicator data to determine the cycle life. The power characteristic detection module uses dynamic testing technology to change the current and measure the voltage, and calculates the power characteristic curve to provide parameter basis for battery selection in high-power application scenarios. The charge and discharge efficiency detection unit measures the charge and discharge energy respectively and calculates the ratio to obtain the efficiency value. The data can help users optimize usage methods and strategies, and also provide evaluation indicators for the development of battery technology. The specific operation steps are not repeated here, which are existing conventional technical means.

[0032] like Figures 1 to 6 As shown, the inner wall of the frame 1 is slidably connected to the supporting plate 3, the battery module 2 is fixed to the supporting plate 3 by bolts, and a battery interface 9 is installed on the side of the battery module 2 close to the detection module 8, which is mainly used to connect the battery module 2 and the vehicle to be installed, and the surface of the support plate 401 is fixedly connected to the cover plate 10 by bolts to increase the protection of the battery module 2.

[0033] like Figures 1 to 14 As shown, although the on-board power battery pack is equipped with a heat dissipation design in the original vehicle, heat dissipation cannot be ignored when it is used in rescue scenarios. Although the cooling system of the original vehicle can operate normally, the new application scenario will change the battery working conditions, such as the frequent starting and stopping of the rescue vehicle due to the harsh search and rescue environment, long-term low-speed driving and load changes. These driving conditions that are different from the original vehicle will cause differences in battery heating.

[0034] In addition, since the performance of the battery pack has declined during the cascade utilization stage, with the aging and repeated use of the battery, the efficiency of its internal chemical reaction decreases and the internal resistance of the battery increases. This series of factors will cause the battery to generate more heat during the charging and discharging process. Therefore, a heat dissipation component 4 is installed on the surface of the supporting plate 3 for local heat dissipation of the heat generated by the battery module 2 during operation.

[0035] Specifically, the heat dissipation component 4 includes a support plate 401, which is fixedly arranged on the surface of the supporting plate 3. A plurality of first heat dissipation holes 402 are opened on the outer side of the supporting plate 3. A plurality of heat conductive sheets 403 are fixedly arranged on the outer side of the battery module 2, which are mainly used to quickly conduct away the heat generated by the battery module 2 during operation and reduce the accumulation of heat inside the battery module 2, thereby reducing the adverse effects of local overheating on battery performance and life. The heat conductive sheet 403 is made of copper, and the contact surface between the heat conductive sheet 403 and the battery module 2 is coated with thermal conductive silicone grease to improve the heat conduction efficiency.

[0036] A guide cylinder 404 is fixedly provided on the surface of the heat conducting plate 403, and a memory alloy spring 405 is fixedly provided on the inner wall of the guide cylinder 404. The structural characteristics of the guide cylinder 404 itself can guide the telescopic movement of the memory alloy spring 405, ensuring that the memory alloy spring 405 can only move linearly along a predetermined direction when it expands when heated or contracts when cooled, thereby avoiding disordered swinging or deviation of the spring 702.

[0037] It should be noted that the memory alloy spring 405 is a nickel-titanium alloy memory spring. The nickel-titanium alloy has a shape memory effect. There are two different crystal structure phases inside it, namely, the austenite phase and the martensite phase. Under different temperature conditions, the alloy will transform between these two phases, resulting in a change in shape. When the temperature rises to a certain level, the nickel-titanium alloy will transform from the martensite phase to the austenite phase, and the shape of the memory alloy spring 405 will change accordingly.

[0038] A guide groove 406 is provided on one side of the guide cylinder 404, a sliding sheet 407 is fixedly provided on one end of the memory alloy spring 405, a plurality of second heat dissipation holes 408 are provided on the sliding sheet 407, the sliding sheet 407 is slidably connected to the supporting plate 3 through the sliding groove, and a sealing ring is fixed on one side of the sliding sheet 407 close to the supporting plate 3, which is used to increase the sealing between the sliding sheet 407 and the supporting plate 3.

[0039] During the charging or discharging operation of the battery module 2, its temperature will rise, and the temperature rise process does not occur uniformly in the entire module, but presents local characteristics. When the temperature of a local area of ​​the battery module 2 rises, the heat will be conducted through the heat conductive sheet 403, and the heat conductive sheet 403 will transfer the heat to the memory alloy spring 405. In view of the characteristics of the nickel-titanium alloy, after receiving the heat transferred from the heat conductive sheet 403, the memory alloy spring 405 will undergo corresponding deformation according to the change in temperature, which is specifically manifested as stretching or expansion.

[0040] During the deformation of the memory alloy spring 405, due to the design and synergy of the guide cylinder 404 and the guide groove 406, the deformation of the spring 702 can be converted into a driving force for the sliding sheet 407, prompting the sliding sheet 407 to slide upward along the direction defined by the guide groove 406. As the sliding sheet 407 continues to move upward along the inner wall of the support plate 401, the second heat dissipation hole 408 opened on its surface will gradually approach and eventually achieve a connected state with the first heat dissipation hole 402 on the outside of the supporting plate 3.

[0041] Once the first heat dissipation hole 402 and the second heat dissipation hole 408 are successfully fitted and docked, air in the external environment can enter the internal space of the support plate 401, thereby forming an air convection channel, which directly acts on the local area of ​​the battery module 2 with higher temperature, and realizes targeted heat dissipation and cooling function. When the vehicle is in a driving state, with the help of the relative airflow movement generated by the forward movement of the vehicle, the external air can pass through the first heat dissipation hole 402 and the second heat dissipation hole 408, further enhancing the heat dissipation effect on the local high-temperature area of ​​the battery module 2, ensuring that the battery module 2 can maintain a relatively stable and suitable operating temperature range under different working conditions such as charging, discharging and vehicle driving.

[0042] When the temperature of the battery module 2 gradually decreases due to heat dissipation, the memory alloy spring 405 will recover to its initial shape according to its shape memory characteristics. During this process of recovery, the memory alloy spring 405 will drive the sliding sheet 407 connected thereto to slide downward along the inner wall of the support plate 401. As the sliding sheet 407 moves downward, its groove 6 will gradually fit and align with the first heat dissipation hole 402 on the carrier plate 3, thereby constructing a barrier to effectively prevent external air from entering the first heat dissipation hole 402, thereby avoiding excessive temperature drop of the battery module 2 or other potential adverse effects caused by unnecessary air circulation, thereby ensuring that the battery module 2 can operate stably in a suitable temperature environment and maintain its stable and durable performance.

[0043] When it is in a winter environment or the battery module 2 is not in operation, the temperature of the battery module 2 is in a normal range. At this time, the memory alloy spring 405 is not subjected to heat stimulation sufficient to cause it to deform, so it maintains its original shape and does not deform. Correspondingly, it does not drive the sliding sheet 407 to slide. In this case, the groove 6 of the sliding sheet 407 fits tightly with the first heat dissipation hole 402 on the carrier plate 3 to form a relatively closed structure. This state can effectively block external cold air from entering the area where the battery module 2 is located, and prevent the battery module 2 from dropping in temperature due to the invasion of the external low temperature environment, thereby ensuring that the battery module 2 can always maintain a suitable temperature range when working, minimizing the negative impact on the working efficiency of the battery module 2 due to the temperature drop, ensuring the performance stability and reliability of the battery module 2 under various working conditions, extending the service life of the battery module 2 and improving the environmental adaptability of the entire battery system.

[0044] like Figures 1 to 9 As shown, further, considering that dust is easily attached to the surface of the first heat dissipation holes 402 and the second heat dissipation holes 408 during long-term contact with the air, the accumulation of dust will gradually change the physical structure and surface characteristics of the first heat dissipation holes 402 and the second heat dissipation holes 408, thereby increasing the flow resistance of air when passing through these heat dissipation holes, thereby seriously affecting the heat dissipation efficiency and performance of the first heat dissipation holes 402 and the second heat dissipation holes 408, so a plurality of protrusions 5 are equidistantly arranged on one side of the support plate 401 close to the sliding sheet 407, and a plurality of grooves 6 are equidistantly opened on one side of the sliding sheet 407 close to the support plate 401.

[0045] During the charging and discharging process of the battery module 2, once the local temperature is too high, the heat will be transferred to the memory alloy spring 405 through the heat conductive sheet 403, causing it to deform as the temperature rises, thereby driving the sliding sheet 407 to slide upward along the inner wall of the support plate 401. During this process, the groove 6 on the sliding sheet 407 will contact the protrusion 5 on the inner wall of the support plate 401. As the local temperature of the battery module 2 continues to rise, the memory alloy spring 405 continues to deform due to temperature changes, and continuously pushes the sliding sheet 407 to slide upward, so that the groove 6 and the protrusion 5 always maintain a contact state. This contact will induce vibration, which will be transmitted to the first heat dissipation hole 402 covered by the sliding sheet 407 and the second heat dissipation hole 408 on the support plate 401, causing the hole wall to shake. Through this vibration, dust attached to the first heat dissipation hole 402 and the second heat dissipation hole 408 will fall off due to the vibration force, thereby effectively avoiding the adverse effects of dust accumulation on heat dissipation performance.

[0046] When the battery module 2 stops working and the temperature gradually decreases, the memory alloy spring 405 returns to its original shape, driving the sliding sheet 407 to reset downward along the inner wall of the support plate 401. During this process, the groove 6 of the sliding sheet 407 contacts the protrusion 5 again, causing vibration again. In this way, no matter whether the local temperature of the battery module 2 rises or falls, the dust removal operation of the first heat dissipation hole 402 and the second heat dissipation hole 408 can be automatically triggered to ensure that the two heat dissipation holes always maintain good heat dissipation performance.

[0047] like Figures 1 to 14 As shown, further, when the battery module 2 is used in a cascade manner in vehicles such as sightseeing vehicles, sanitation vehicles, and logistics distribution tricycles or four-wheel vehicles, these vehicles will inevitably encounter bumpy roads or other complex road conditions during driving, causing the battery module 2 to vibrate. This vibration may cause many adverse effects. On the one hand, the vibration may cause relative displacement or friction between the electrode material and the current collector inside the battery, thereby damaging the electrode structure, increasing the internal resistance of the battery, and reducing the battery's charging and discharging efficiency; on the other hand, continuous vibration may also loosen the connecting parts inside the battery. Once these connecting parts become loose, the contact resistance of the battery will increase, and may even cause a short circuit failure, seriously affecting the overall performance and reliability of the battery module 2, shortening its service life, and also posing a potential threat to the vehicle's operating safety. Therefore, a vibration reduction component 7 for reducing vibration of the battery module 2 is also provided on the inner wall of the frame 1.

[0048] Specifically, the vibration reduction assembly 7 includes a vibration reduction device 701, which is fixedly arranged on the inner wall of the frame 1, one end of the vibration reduction device 701 is fixed to the bottom of the supporting plate 3, a plurality of springs 702 are fixedly arranged on the inner wall of the frame 1, one end of the spring 702 is fixed to the bottom of the supporting plate 3, an avoidance groove 703 is opened on one side of the frame 1, a rotating plate 704 is rotatably arranged on the inner wall of the avoidance groove 703, a downward pressure rod 705 is fixedly arranged on the bottom of the supporting plate 3, and the downward pressure rod 705 is rotatably connected to the rotating plate 704 through an axle pin.

[0049] Exhaust holes 706 are equidistantly provided on both sides of the support plate 401, a plurality of support bars 707 are fixedly provided on one side of the frame 1 close to the rotating plate 704, a first sliding groove 708 is provided on the support bar 707, a tank body 709 is fixedly provided on one side of the frame 1 close to the support bar 707, a piston 710 is slidably provided on the inner wall of the tank body 709, a piston rod 711 is fixedly provided on the surface of the piston 710, a second sliding groove 712 is provided on the rotating plate 704, and the outer side wall of the piston rod 711 is slidably connected to the inner wall of the first sliding groove 708 and the second sliding groove 712 respectively, and the tank body 709 is far away from the inner wall of the tank body 709. An air inlet pipe 713 is connected to the end away from the piston rod 711, and an air outlet pipe 11 is connected to the end of the tank body 709 away from the piston rod 711. The inner walls of the air inlet pipe 713 and the air outlet pipe 11 are both provided with one-way valves, so that the air inlet pipe 713 can only take in air, and the air outlet pipe 11 can only exhaust air. The one-way valve in the air inlet pipe 713 ensures that the gas can only flow into the tank body 709 in one direction, effectively preventing the air inhaled in the tank body 709 from flowing back to the external environment, and the one-way valve of the air outlet pipe 11 limits the gas to be discharged only from the inside of the tank body 709 to the outside, preventing external gas from entering the tank body 709 in the opposite direction through the air outlet pipe 11.

[0050] Two hoses 714 are connected to the outside of the air outlet pipe 11, and the two hoses 714 are respectively fixed through the inner wall of the frame 1 and the support plate 401. The ends of the two hoses 714 away from the air outlet pipe 11 are both conical, which can effectively gather and accelerate the air flowing from the air outlet pipe 11 into the hoses 714.

[0051] When the battery module 2 is used in other types of vehicles in a cascade manner, especially when the vehicle is traveling on a bumpy road, the vibration reduction component 7 not only plays a role in buffering vibrations, but also utilizes the force generated by the up and down sliding of the supporting plate 3 during the vibration reduction process. On the one hand, this force can accelerate the flow and exchange of air around the battery module 2, thereby achieving the effect of replacing the air, ensuring that the battery module 2 is always in a good heat exchange environment, and effectively improving the heat dissipation efficiency; on the other hand, this force can also act on the areas near the first heat dissipation holes 402 and the second heat dissipation holes 408, blowing away dust that falls on the supporting plate 3, thereby further extending the service life and performance of the battery module 2 during the cascade utilization process.

[0052] When a vehicle equipped with a battery module 2 travels on a bumpy road, the battery module 2 itself has a certain weight, and the impact force generated by the bump will cause the supporting plate 3 to slide downward along the inner wall of the frame 1. During this process, the supporting plate 3 will exert an extrusion effect on the spring 702 and the shock absorber 701. After the vehicle passes the bumpy road, the spring 702 deforms due to its elastic restoring force, thereby pushing the supporting plate 3 to slide upward along the inner wall of the frame 1 to achieve a reset operation.

[0053] When the support plate 3 slides downward, the lower pressure rod 705 connected thereto also slides downward synchronously. The downward movement of the lower pressure rod 705 drives the rotating plate 704 to rotate upward around its rotating axis through the connecting component of the axle pin. The upward rotation of the rotating plate 704, with the help of the guiding and restraining effect of the second sliding groove 712, drives the piston rod 711 to slide upward along the sliding groove. At the same time, the structural characteristics of the first sliding groove 708 will further limit the movement trajectory of the piston rod 711, so that while it slides upward along the second sliding groove 712, it also moves upward along the inner wall of the first sliding groove 708. As the piston rod 711 moves upward, the piston 710 fixed at its end will slide upward accordingly inside the tank body 709. At this time, under the action of the pressure difference, the air intake pipe 713 draws external air into the tank body 709.

[0054] When the supporting plate 3 slides upward under the restoring force of the spring 702, the supporting plate 3 will drive the pressing rod 705 to move upward, and the pressing rod 705 will drive the rotating plate 704 to rotate downward through the shaft pin. The downward rotation of the rotating plate 704, with the help of the coordinated action of the second sliding groove 712 and the first sliding groove 708 on the piston rod 711, prompts the piston 710 to slide downward along the inner wall of the tank body 709. In this way, the air previously inhaled in the tank body 709 will be discharged from the exhaust pipe under the pressure of the piston 710, and the gas discharged from the exhaust pipe will be discharged into the interior of the supporting plate 401 through the two hoses 714. These gases form a circulating airflow in the support plate 401, which can not only promote the circulation and renewal of the air in the support plate 401 and improve the heat dissipation environment of the battery module 2, but also can blow away the dust that falls off and accumulates nearby due to the vibration of the first heat dissipation hole 402 and the second heat dissipation hole 408, so that it can be discharged through the exhaust hole 706, thereby effectively maintaining the unobstructed flow of the heat dissipation holes, ensuring that the heat dissipation performance of the battery module 2 is stable and reliable, and ensuring that the battery module 2 can maintain a good working state even when encountering bumpy road conditions during the driving of the vehicle, thereby extending the service life of the battery and improving the stability of the entire battery system.

[0055] like Fig.13 As shown, it should be noted that the up and down sliding range of the supporting plate 3 is restricted by the degree of vehicle bumping. In some cases where the degree of bumping is relatively light, the up and down sliding stroke of the supporting plate 3 is relatively small. As a result, it may not be able to fully press the gas in the tank body 709 to make it eject forcefully. Even if it is ejected, the force of the gas is difficult to meet the actual demand for conveying air. In view of this, the rotating plate 704 and the lower pressure rod 705 are designed as a laborious lever. When the vehicle bumps are not obvious and the stroke of the supporting plate 3 is limited, the characteristics of the laborious lever can effectively increase the stroke of intake and exhaust. By increasing the stroke, the intake amount of the gas in the tank body 709 is more sufficient, and the pressure and flow rate during exhaust are also significantly improved, thereby ensuring that air with sufficient force can be delivered to the corresponding position.

[0056] like Fig.13 As shown, it should also be noted that a certain margin is reserved in the length of the hose 714 during installation, which is sufficient to ensure that when the supporting plate 3 slides up and down, excessive pulling force will not be generated on the hose 714 due to the displacement change, thereby avoiding problems such as rupture of the hose 714, loose connection or gas leakage caused by the hose 714 being pulled.

[0057] like Figures 1 to 14 As shown, the working principle of the technical solution provided by the present invention is as follows: during the charging or discharging operation of the battery module 2, its temperature will rise, and the temperature rise process does not occur uniformly in the entire module, but presents local characteristics. When the temperature of a local area of ​​the battery module 2 rises, the heat will be conducted through the heat conductive sheet 403, and the heat conductive sheet 403 will transfer the heat to the memory alloy spring 405. In view of the characteristics of the nickel-titanium alloy, after receiving the heat transferred from the heat conductive sheet 403, the memory alloy spring 405 will undergo corresponding deformation according to the change in temperature, which is specifically manifested as stretching or expansion.

[0058] During the deformation of the memory alloy spring 405, due to the design and synergy of the guide cylinder 404 and the guide groove 406, the deformation of the spring 702 can be converted into a driving force for the sliding sheet 407, prompting the sliding sheet 407 to slide upward along the direction defined by the guide groove 406. As the sliding sheet 407 continues to move upward along the inner wall of the support plate 401, the second heat dissipation hole 408 opened on its surface will gradually approach and eventually achieve a connected state with the first heat dissipation hole 402 on the outside of the supporting plate 3.

[0059] Once the first heat dissipation hole 402 and the second heat dissipation hole 408 are successfully fitted and docked, air in the external environment can enter the internal space of the support plate 401, thereby forming an air convection channel, which directly acts on the local area of ​​the battery module 2 with higher temperature, and realizes targeted heat dissipation and cooling function. When the vehicle is in a driving state, with the help of the relative airflow movement generated by the forward movement of the vehicle, the external air can pass through the first heat dissipation hole 402 and the second heat dissipation hole 408, further enhancing the heat dissipation effect on the local high-temperature area of ​​the battery module 2, ensuring that the battery module 2 can maintain a relatively stable and suitable operating temperature range under different working conditions such as charging, discharging and vehicle driving.

[0060] When the temperature of the battery module 2 gradually decreases due to heat dissipation, the memory alloy spring 405 will recover to its initial shape according to its shape memory characteristics. During this process of recovery, the memory alloy spring 405 will drive the sliding sheet 407 connected thereto to slide downward along the inner wall of the support plate 401. As the sliding sheet 407 moves downward, its groove 6 will gradually fit and align with the first heat dissipation hole 402 on the carrier plate 3, thereby constructing a barrier to effectively prevent external air from entering the first heat dissipation hole 402, thereby avoiding excessive temperature drop of the battery module 2 or other potential adverse effects caused by unnecessary air circulation, thereby ensuring that the battery module 2 can operate stably in a suitable temperature environment and maintain its stable and durable performance.

[0061] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A retired vehicle-mounted power battery pack that is convenient for cascade utilization, comprising a frame and a battery module, wherein the inner wall of the frame is slidably connected to a bearing plate, and the battery module is fixed to the bearing plate by bolts, characterized in that: The surface of the carrier plate is provided with a heat dissipation component for locally dissipating the heat generated by the battery module when it is working; The heat dissipation assembly includes a support plate, which is fixedly arranged on the surface of a carrier plate, a plurality of first heat dissipation holes are opened on the outer side of the carrier plate, a plurality of heat conductive sheets are fixedly arranged on the outer side of the battery module, a guide cylinder is fixedly arranged on the surface of the heat conductive sheet, a memory alloy spring is fixedly arranged on the inner wall of the guide cylinder, a guide groove is opened on one side of the guide cylinder, a sliding sheet is fixedly arranged on one end of the memory alloy spring, a plurality of second heat dissipation holes are opened on the sliding sheet, and the sliding sheet is slidably connected to the carrier plate through a sliding groove.

2. The retired vehicle-mounted power battery pack that is convenient for cascade utilization according to claim 1 is characterized in that: A plurality of protrusions are equidistantly arranged on one side of the support plate close to the sliding sheet, and a plurality of grooves are equidistantly arranged on one side of the sliding sheet close to the support plate.

3. The retired vehicle power battery pack that is convenient for cascade utilization according to claim 1 is characterized in that: The inner wall of the frame is also provided with a vibration reduction assembly for reducing vibration of the battery module, the vibration reduction assembly includes a vibration reducer, the vibration reducer is fixedly arranged on the inner wall of the frame, one end of the vibration reducer is fixed to the bottom of the load-bearing plate, a plurality of springs are fixedly arranged on the inner wall of the frame, one end of the spring is fixed to the bottom of the load-bearing plate, an avoidance groove is opened on one side of the frame, a rotating plate is rotatably arranged on the inner wall of the avoidance groove, a lower pressure rod is fixedly arranged on the bottom of the load-bearing plate, and the lower pressure rod is rotatably connected to the rotating plate through an axle pin; Exhaust holes are equidistantly provided on both sides of the support plate, a plurality of support bars are fixedly provided on one side of the frame close to the rotating plate, a first sliding groove is provided on the support bar, a tank body is fixedly provided on one side of the frame close to the support bar, a piston is slidably provided on the inner wall of the tank body, a piston rod is fixedly provided on the surface of the piston, a second sliding groove is provided on the rotating plate, the outer side wall of the piston rod is slidably connected to the inner walls of the first sliding groove and the second sliding groove respectively, an end of the tank body away from the piston rod is connected to an air inlet pipe, an end of the tank body away from the piston rod is connected to an air outlet pipe, two hoses are respectively connected to the outer sides of the air outlet pipes, and the two hoses pass through the frame and are fixed to the inner wall of the support plate respectively.

4. The retired vehicle-mounted power battery pack that is convenient for cascade utilization according to claim 1 is characterized in that: The battery module is equipped with a detection module for detecting the performance of the battery module, and the detection module includes an internal resistance detection unit, a capacity detection module, a self-discharge rate detection unit, a cycle life test unit, a power characteristic detection module and a charge and discharge efficiency detection unit.

5. The retired vehicle-mounted power battery pack that is convenient for cascade utilization according to claim 3 is characterized in that: The inner walls of the air inlet pipe and the air outlet pipe are both provided with one-way valves.

6. The retired vehicle-mounted power battery pack that is convenient for cascade utilization according to claim 3 is characterized in that: The ends of the two hoses away from the air outlet pipe are both arranged in a conical shape.

7. The retired vehicle power battery pack that is convenient for cascade utilization according to claim 1 is characterized in that: A battery interface is installed on one side of the battery module close to the detection module.

8. The retired vehicle-mounted power battery pack that is convenient for cascade utilization according to claim 1 is characterized in that: The surface of the support plate is fixedly connected with a cover plate by bolts.

9. The retired vehicle power battery pack that is convenient for cascade utilization according to claim 1 is characterized in that: A sealing ring is fixed on one side of the sliding sheet close to the bearing plate.

10. The retired vehicle power battery pack that is convenient for cascade utilization according to claim 1, characterized in that: The material of the heat conducting sheet is copper, and the contact surface between the heat conducting sheet and the battery module is coated with thermal conductive silicone grease.

Images