A self-damping battery module and battery pack for converting lead-acid batteries to lithium batteries for forklifts

Abstract

The present invention relates to the technical field of forklift batteries, and in particular to a self-vibration-damping battery module and battery pack for converting lead-acid batteries to lithium batteries for forklifts. Among them, a self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts comprises a protective shell, a counterweight module, a lithium battery cell, a detection module and a locking module. The self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention detects temperature or flow rate in the air flow channel through the cooperation of the detection module and the T-shaped buffer, so that the T-shaped buffer can actively strengthen the longitudinal tension on the protective shell according to the different working states of the forklift when the forklift is running at high load, so that the protective shell is close to the counterweight module, providing a high-strength vibration-damping effect, and avoiding the movement of the forklift affecting the operation of the self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts; when the forklift is running at low load or the load of the adjustment spring is reduced, the overall working life is improved, and the use cost and maintenance cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of forklift batteries, and in particular to a self-damping battery module and a battery pack for converting lead-acid batteries to lithium batteries for forklifts. Background Art

[0002] Traditional forklifts generally use lead-acid batteries as their power source, but these batteries have disadvantages such as low energy density, long charging times, short service life, high maintenance costs, and significant environmental pollution. With the rapid development of lithium battery technology, their advantages, such as high energy density, long cycle life, fast charging, maintenance-free operation, intelligent monitoring and alarm capabilities, and environmental friendliness, are becoming increasingly prominent. Replacing forklift lead-acid batteries with lithium batteries has become an industry trend.

[0003] When replacing a lead-acid battery pack with a lithium battery, if the original battery pack is completely discarded and a new one is purchased, the modification cost will be high. If the lead-acid battery module is directly replaced with a lithium battery module, due to the overall lighter weight of the lithium battery module, if a forklift is converted from lead-acid to lithium, it is easy to cause safety hazards when the forklift is working with heavy objects. It is necessary to add a counterweight mechanism to adjust the center of gravity of the battery pack. At the same time, because lithium batteries have high requirements for temperature and operating environment stability, it is necessary to add heat dissipation and vibration reduction mechanisms to the battery pack to protect the lithium battery module. However, this method requires targeted design of battery packs of different specifications and significant adjustments to the internal structure of the battery pack. It is impossible to form a universal solution, resulting in high modification costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self-damping battery module and battery pack for converting lead-acid battery to lithium battery in forklift, so as to solve the problem that the existing lithium battery module cannot directly replace the lead-acid battery module in the forklift battery pack.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts, comprising:

[0006] The protective shell includes a top cover, a protective frame and a heat-equalizing bottom plate. The top cover is arranged on the top of the protective frame, and a battery cavity is arranged in the protective frame. The bottom of the protective frame is provided with a first step groove and a second step groove which shrink in sequence. The heat-equalizing bottom plate is embedded in the first step groove. The side wall of the second step groove is provided with a first through hole, and the middle of the second step groove is provided with a second through hole. At least four T-shaped buffers are provided at the bottom of the protective frame, and the T-shaped buffers are provided with a supporting ring and a T-shaped slider. The T-shaped buffer includes a columnar portion and an extension portion. The columnar portion extends vertically from the bottom of the protective frame, and the extension portion is arranged on one side of the end of the columnar portion and extends horizontally. An action ring is sleeved on the upper and lower sides of the extension portion, and a driving mechanism is arranged in the columnar portion. The action ring is connected to the driving mechanism through a transmission groove on the columnar portion. The action ring is raised and lowered along the transmission groove under the drive of the driving mechanism. An adjustment spring is provided between the action ring, the supporting ring and the T-shaped slider.

[0007] The counterweight module is arranged at the bottom of the protective frame; an air flow channel is provided in the middle of the counterweight module, the air flow channel is arranged corresponding to the second through hole, and the air flow channel is connected to the outside through a conveying pipeline; T-shaped chutes are provided on both sides of the air flow channel, and the T-shaped chutes are distributed along the length direction of the counterweight module and only pass through one side of the counterweight module; the T-shaped buffer is slidably connected to the T-shaped chute, and the support ring and the T-shaped slider are respectively in contact with the upper and lower walls of the T-shaped chute;

[0008] A lithium battery cell is disposed in the battery cavity, the lithium battery cell abuts against the soaking plate, and in the vertical direction, the projection area of the soaking plate is within the projection area of the lithium battery cell;

[0009] A locking module is provided on one side of the protection frame and is used to slide the protection frame toward the side of the counterweight module that is not penetrated by the T-shaped slide groove;

[0010] The detection module is arranged in the air flow channel, electrically connected to the driving mechanism, and includes a flow sensor and / or a temperature sensor.

[0011] In one embodiment, the supporting ring is formed by at least two arc rings, and an adjustment spring is provided between each arc ring and the action ring piece.

[0012] In one embodiment, when the adjustment spring is not compressed, the distance from the outer surface of the T-shaped slider to the outer surface of the supporting ring is greater than the distance between the upper and lower walls of the T-shaped slot.

[0013] In one embodiment, the locking module includes a telescopic rod and an arc-shaped rod, one end of the telescopic rod is hinged to the side of the counterweight module that is not penetrated by the T-shaped slide, and the other end of the telescopic rod is hinged to the middle of the arc-shaped rod; one end of the arc-shaped rod is hinged to the side of the counterweight module that is not penetrated by the T-shaped slide, and the other end of the arc-shaped rod is detachably connected to the protective frame; the telescopic rod pulls the arc-shaped rod and thereby drives the protective frame to slide toward the side of the counterweight module that is not penetrated by the T-shaped slide.

[0014] In one embodiment, a heat dissipation fin is provided below the heat-spreading bottom plate, and the heat dissipation fin is arranged along the opening direction of the first through hole and in the second stepped groove.

[0015] In one embodiment, the air flow channel includes a diffusion section, a connecting section and a confluence section. The connecting section is arranged between the diffusion section and the confluence section. The diffusion section gradually expands and extends from the connecting section toward the side where the counterweight module and the protective frame abut against each other. The confluence section is distributed along the length direction of the counterweight module and is connected to the conveying pipeline. In the vertical direction, the projection area of the second through hole is within the projection area of the diffusion section.

[0016] In one embodiment, the delivery pipeline is arranged on a side of the confluence section close to the locking module.

[0017] In one embodiment, an insulating buffer pad is provided between the lithium battery cell and the protective frame.

[0018] The present invention also provides a self-vibration-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts, comprising a mounting shell, a conveying fan, and any of the above-described self-vibration-damping battery modules for converting lead-acid batteries to lithium batteries for forklifts. The self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts and the conveying fan are arranged in the mounting shell, and an air supply port is provided on the mounting shell. The conveying fan is connected to the air flow channel and the air supply port through a conveying pipeline.

[0019] In one embodiment, a vent is further provided on the mounting shell, and the vent is arranged above the first through hole.

[0020] The beneficial effects of the present invention are:

[0021] The self-damping battery module for converting lead-acid batteries to lithium batteries in forklifts provided by the present invention utilizes a protective frame with first and second stepped grooves, combined with a heat-saturating base plate, to form a built-in heat dissipation structure within the battery module. Airflow is transported through the first and second through-holes, resulting in a simple, stable structure and easy maintenance. While ensuring effective heat dissipation, it also isolates the lithium battery cells from the outside world, ensuring that the lithium battery cells are not affected by moisture, dust, and other environmental factors during operation.

[0022] 2. The self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention is provided with an air flow channel in the counterweight module, so that the air flow can be connected with the second stepped groove, and the air flow can flow along the air flow channel to complete the heat exchange with the heat-saturating bottom plate, so that the counterweight module can participate in the heat dissipation process while lifting the counterweight, effectively improving the linkage effect between different modules and the integration of the self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts, so that the self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts can achieve multiple protections for lithium battery cells in a limited space, ensuring the normal operation of the lithium battery cells.

[0023] 3. The self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention maintains a locked state between the protective shell and the counterweight module through the cooperation of the T-shaped buffer and the T-shaped slide groove, as well as the continuous pulling force provided by the locking module, thereby providing a limiting and vibration-damping effect on the entire lithium battery cell, ensuring the alignment of the second through hole and the air flow channel, and ensuring normal heat dissipation.

[0024] 4. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention has a stable overall structure, and integrates functions such as counterweight, vibration reduction, and heat exchange. It has strong versatility while ensuring operational stability. It can directly replace lead-acid battery modules without changing the main structure of the battery pack, greatly reducing the difficulty of modification and reducing costs, and has good promotion value.

[0025] 5. The self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention detects temperature or flow rate in the air flow channel through the cooperation of the detection module and the T-shaped buffer, so that the T-shaped buffer can actively strengthen the longitudinal tension on the protective shell according to the different working states of the forklift when the forklift is running at high load, so that the protective shell is close to the counterweight module, providing a high-strength vibration-damping effect, and preventing the movement of the forklift from affecting the operation of the self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts; when the forklift is running at low load, or the load of the adjustment spring is reduced, the overall working life is increased and the use cost and maintenance cost are reduced.

[0026] 6. The self-vibration-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention adopts a self-vibration-damping battery module for converting lead-acid batteries to lithium batteries for forklifts with internal integrated heat exchange, vibration reduction and counterweight functions. It can replace the lead-acid battery module on the original lead-acid battery pack overall frame, ensuring the normal and stable operation of the lithium battery module, and can adapt to battery pack frames of different specifications, greatly reducing the modification cost.

[0027] Other features and beneficial effects of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other beneficial effects of the present invention can be achieved and obtained by the structures and / or components specified in the description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0030] Figure 3 Schematic diagram of the internal structure of a T-shaped buffer member in one embodiment of the present invention;

[0031] Figure 4 A schematic structural diagram of a T-shaped buffer member in one embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the structure of the action ring piece in one embodiment of the present invention;

[0033] Figure 6 A cross-sectional view in the longitudinal direction of an embodiment of the present invention;

[0034] Figure 7 A cross-sectional view in the width direction of an embodiment of the present invention;

[0035] Figure 8 This is a three-dimensional schematic diagram of a protective frame in one embodiment of the present invention;

[0036] Figure 9 is a three-dimensional schematic diagram of a configuration module in one embodiment of the present invention;

[0037] Figure 10 is a perspective schematic diagram of another embodiment of the present invention;

[0038] Figure 11 for Figure 7 A three-dimensional schematic diagram of the internal structure of the embodiment;

[0039] Figure 12 for Figure 7 A cross-sectional view of the installation housing in the longitudinal direction of the embodiment;

[0040] Figure 13 for Figure 7 A cross-sectional view of another location of the housing in the longitudinal direction in the embodiment;

[0041] Figure 14 for Figure 7 Cross-sectional view of the embodiment in the width direction.

[0042] Description of labels:

[0043] 1. Self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts; 11. Protective housing; 111. Top cover; 112. Protective frame; 1121. First stepped groove; 1122. Second stepped groove; 1123. First through-hole; 1124. Second through-hole; 113. Heat-saturating bottom plate; 114. Heat dissipation fins; 115. T-shaped buffer; 1151. Columnar portion; 1152. Extension portion; 1153. Actuating ring; 1154. Driving mechanism; 1155. Transmission slot; 116. Support Support ring; 117, T-shaped slider; 118, adjustment spring; 12, counterweight module; 121, air flow channel; 1211, diffusion section; 1212, connection section; 1213, confluence section; 122, T-shaped slide; 123, conveying pipeline; 13, lithium battery cell; 14, locking module; 141, telescopic pull rod; 142, arc pull rod; 2, installation shell; 21, BMS mainboard; 22, protection plate; 23, conveying fan; 24, air outlet; 25, ventilation outlet. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and should not be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and the relevant field, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present invention.

[0046] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0047] Please refer to Figures 1 to 14 A self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts includes: a protective shell 11, a counterweight module 12, a lithium battery cell 13 and a locking module 14.

[0048] The protective shell 11 includes a top cover 111, a protective frame 112 and a heat-spreading bottom plate 113. The top cover 111 is arranged on the top of the protective frame 112, and a battery cavity is provided in the protective frame 112; the bottom of the protective frame 112 is provided with a first stepped groove 1121 and a second stepped groove 1122 which are successively retracted, and the heat-spreading bottom plate 113 is embedded in the first stepped groove 1121, and the side wall of the second stepped groove 1122 is provided with a first through hole 1123, and the middle of the second stepped groove 1122 is provided with a second through hole 1124. Specifically, after being embedded, the heat-averaging bottom plate 113 is flush with the table top of the first stepped groove 1121, so that the internal space of the protective frame 112 is divided into a battery cavity above the heat-averaging bottom plate 113 and a second stepped groove 1122 below the heat-averaging bottom plate 113. A first through hole 1123 is provided on the side wall of the second stepped groove 1122, and a second through hole 1124 is provided at the bottom of the second stepped groove 1122, that is, the bottom of the protective frame 112, so that air flow can flow into or out of the second stepped groove 1122 along the direction from the first through hole 1123 to the second through hole 1124, so that the second stepped groove 1122 actually forms a heat exchange cavity.

[0049] At least four T-shaped buffers 115 are located at the bottom of the protective frame 112, near the corners. Each T-shaped buffer 115 is equipped with a support ring 116 and a T-shaped slider 117. Each T-shaped buffer 115 comprises a cylindrical portion 1151 extending vertically from the bottom of the protective frame 112 and an extension 1152 located at one end of the cylindrical portion 1151 and extending horizontally. The upper and lower sides of the extension portion 1152 are provided with action ring pieces 1153, and the cylindrical portion 1151 is provided with a driving mechanism 1154. The action ring piece 1153 is connected to the driving mechanism 1154 through a transmission groove 1155 on the cylindrical portion 1151. The action ring piece 1153 is driven by the driving mechanism 1154 and rises and falls along the transmission groove 1155. An adjustment spring 118 is provided between the action ring piece 1153, the support ring 116, and the T-shaped slider 117. Specifically, the driving mechanism 1154 can adopt a ball screw driven by a motor, and the part of the action ring piece 1153 extending into the transmission groove 1155 is connected to the ball screw. Preferably, the driving mechanism 1154 adopts two oppositely rotating ball screws for solid connection, with the connection point located at the extension portion 1152, so that the action ring pieces 1153 on the upper and lower sides of the extension portion 1152 move toward each other under the drive of a motor. More preferably, the driving mechanism 1154 may use four ball screws driven by a motor through a gear set, and each ball screw is connected to the action ring 1153.

[0050] The counterweight module 12 is disposed at the bottom of the protective frame 112. An airflow channel 121 is provided in the middle of the counterweight module 12. The airflow channel 121 corresponds to the second through hole 1124. The airflow channel 121 communicates with the outside via a delivery pipe 123. Specifically, the delivery pipe 123 can be connected to a forklift air conditioning assembly or a fan assembly, allowing the forklift to deliver cold air, hot air, or air to the forklift's lead-acid to lithium battery self-damping battery module 1 through the delivery pipe 123, thereby ensuring that the temperature of the forklift's lead-acid to lithium battery self-damping battery module 1 meets the required temperature.

[0051] T-shaped grooves 122 are provided on both sides of the air flow channel 121. The T-shaped grooves 122 are distributed along the length direction of the counterweight module 12 and only pass through one side of the counterweight module 12; the T-shaped buffer 115 is slidably connected to the T-shaped groove 122, and the support ring 116 and the T-shaped slider 117 are respectively in contact with the upper and lower walls of the T-shaped groove 122.

[0052] During actual use, the T-shaped slider 117 or the supporting ring 116 abuts against the upper and lower walls of the T-shaped chute 122, and when the self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts is subjected to vibration, the adjustment spring 118 is compressed, thereby continuously providing elastic force to the extension portion 1152 through the adjustment spring 118, buffering the vibration, and allowing the T-shaped buffer 115 to quickly recover and stabilize, thereby reducing the impact of the vibration on the whole. At the same time, it can avoid excessive vibration causing the protective shell 11 to separate from the counterweight module 12, ensuring normal heat dissipation and ventilation. Those skilled in the art can adjust the elastic force of the adjustment spring 118 at different positions as needed to balance the force on the T-shaped buffer 115, without specific limitation. Specifically, the side of the T-shaped chute 122 that does not pass through the counterweight module 12 limits the sliding direction of the T-shaped buffer 115, making it easier for the operator to align.

[0053] The lithium battery cell 13 is disposed within the battery cavity and abuts against the soaking plate 113. In the vertical direction, the projection of the soaking plate 113 is within the projection of the lithium battery cell 13. That is, the lithium battery cell 13 is larger than the soaking plate 113, and the edges of the lithium battery cell 13 abut against the bottom of the protective frame 112, effectively preventing excessive force on the soaking plate 113, which would otherwise reduce the heat dissipation effect.

[0054] The locking module 14 is provided on one side of the protection frame 112 and is used to make the protection frame 112 slide toward the side of the counterweight module 12 that is not penetrated by the T-shaped sliding groove 122 .

[0055] The detection module is disposed in the airflow channel 121 and includes a flow sensor and / or a temperature sensor, and is electrically connected to the drive mechanism 1154. Specifically, the detection module can be electrically connected to the forklift's control module or BMS motherboard 21, which is connected to the lithium battery cells 13. At the same time, the drive mechanism 1154 is electrically connected to the lithium battery cells 13, which supply power to the drive mechanism 1154 and transmit signals from the forklift's control module or BMS motherboard 21.

[0056] When the detection module detects that the temperature or airflow rate within the airflow channel 121 has reached a set value, it transmits a signal to the drive mechanism 1154 indicating that the forklift has entered a high-load operating state. The drive mechanism 1154 is activated, driving the actuating ring 1153 away from the extension 1152 into a reinforced vibration damping position, further compressing the adjustment spring 118. This increases the longitudinal force acting on the protective housing 11, forcing the protective housing 11 to contact the counterweight module 12. This ensures that the protective housing 11 is in close contact with the counterweight module 12 when the forklift enters the operating state, while also providing a strong vibration damping effect, preventing the forklift's movement from affecting the operation of the forklift's lead-acid to lithium battery self-damping battery module. When the forklift is stopped or operating under light load, the power output decreases. The detection module detects that the flow rate or temperature within the airflow channel 121 has dropped to a set value, causing the drive mechanism 1154 to reverse direction, moving the actuating ring 1153 to either side of the extension 1152. This reduces the load on the adjustment spring 118, increases the service life of the adjustment spring 118, and reduces operating and maintenance costs.

[0057] It is understandable that the self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention has a stable overall structure, and integrates functions such as counterweight, vibration reduction, and heat exchange. It has strong versatility while ensuring operational stability, and can directly replace the lead-acid battery module without changing the main structure of the battery pack, greatly reducing the difficulty of modification, reducing costs, and having good promotion value. At the same time, the self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts provided by the present invention detects temperature or flow rate in the air flow channel through the cooperation of the detection module and the T-shaped buffer member, so that the T-shaped buffer member can actively strengthen the longitudinal tension on the protective shell according to the different working states of the forklift when the forklift is running at high load, so that the protective shell is close to the counterweight module, providing a high-strength vibration reduction effect, and preventing the movement of the forklift from affecting the operation of the self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts; when the forklift is running at low load or the load of the adjustment spring is reduced, the overall working life is improved, and the use cost and maintenance cost are reduced.

[0058] Preferably, the counterweight module 12 can be a unitary metal counterweight block, with the airflow channel 121 and T-shaped chute 122 directly provided on the metal counterweight block. This arrangement provides a stable overall structure that is not affected by vibration. The counterweight module 12 can also be a stacked, screwed metal counterweight block, with the airflow channel 121 and T-shaped chute 122 provided in the topmost metal counterweight block. By adding or removing the metal counterweight blocks at the bottom, the weight and height of the counterweight module 12 can be controlled, further improving adaptability.

[0059] Preferably, a longitudinal soaking plate is provided inside the lithium battery cell 13, and the longitudinal soaking plate and the soaking plate 113 perform rapid heat exchange, so that the overall temperature of the lithium battery cell 13 remains stable. This arrangement can further enhance the heat exchange effect.

[0060] Preferably, a thermal insulation layer is provided on the outer surface of the protective frame 112. This layer prevents abnormal temperatures of the lithium battery cells 13 within a single forklift lead-acid to lithium battery self-damping battery module 1 from affecting other battery modules, thereby improving safety. Furthermore, the thermal insulation layer ensures reliable temperature regulation by allowing the battery modules to exchange heat only through the airflow in the second stepped grooves 1122.

[0061] In one embodiment, the support ring 116 is formed by enclosing at least two arc rings, with an adjustment spring 118 disposed between each arc ring and the actuating ring piece 1153. Specifically, the support ring 116 is segmented, with the multiple arc rings independently buffering forces acting in different directions. This allows the self-damping battery module 1 for forklifts converting from lead-acid batteries to lithium batteries to promptly compress and deform the adjustment springs 118 when subjected to small-area vibrations or vibrations in an oblique direction, thereby ensuring a buffering effect.

[0062] In one embodiment, when the adjustment spring 118 is uncompressed, the distance between the outer surface of the T-shaped slider 117 and the outer surface of the support ring 116 is greater than the distance between the upper and lower walls of the T-shaped slot 122. This arrangement ensures that, after the protective housing 11 and the counterweight module 12 are mated, the action ring 1153 is stably subjected to the forces exerted by the T-shaped slider 117 and the support ring 116, thereby ensuring a stable vibration reduction effect.

[0063] Preferably, when adjustment spring 118 is uncompressed, the ratio of the distance between actuating ring piece 1153 and T-shaped slider 117 to the distance between actuating ring piece 1153 and supporting ring 116 is 1 to 2:1. This arrangement provides more adjustment margin for vertical vibration due to inertia when the forklift vibrates, enhancing the vibration reduction effect.

[0064] In one embodiment, the locking module 14 includes a telescopic rod 141 and an arc-shaped rod 142, one end of the telescopic rod 141 is hinged to the side of the counterweight module 12 that is not penetrated by the T-shaped slot 122, and the other end of the telescopic rod 141 is hinged to the middle of the arc-shaped rod 142; one end of the arc-shaped rod 142 is hinged to the side of the counterweight module 12 that is not penetrated by the T-shaped slot 122, and the other end of the arc-shaped rod 142 is detachably connected to the protective frame 112; the telescopic rod 141 pulls the arc-shaped rod 142 and thereby drives the protective frame 112 to slide toward the side of the counterweight module 12 that is not penetrated by the T-shaped slot 122. The arc-shaped pull rod 142 overcomes the pulling force of the telescopic pull rod 141 and is rotated and installed on the protective frame 112. The telescopic pull rod 141 is extended to provide continuous pulling force on the arc-shaped pull rod 142. The pulling force causes the protective frame 112 to slide. The unpenetrated part of the T-shaped slide groove 122 cooperates with the T-shaped guide column 115 to limit the position of the protective frame 112, thereby completing the overall alignment and locking.

[0065] In one embodiment, heat sink fins 114 are provided below the soaking pan 113. These fins 114 are positioned along the direction of the first through-holes 1123 and within the second stepped grooves 1122. Specifically, the fins 114 are parallel to the airflow direction of the first through-holes 1123, thereby preventing the fins 114 from interfering with the airflow. The presence of the fins 114 accelerates heat exchange between the airflow and the soaking pan 113, enhancing the heat dissipation effect.

[0066] In one embodiment, the airflow channel 121 includes a diffuser section 1211, a connecting section 1212, and a confluence section 1213. The connecting section 1212 is disposed between the diffuser section 1211 and the confluence section 1213. The diffuser section 1211 gradually expands and extends from the connecting section 1212 toward the side where the counterweight module 12 abuts the protective frame 112. The confluence section 1213 extends along the length of the counterweight module 12 and communicates with the delivery pipeline 123. Vertically, the projection of the second through hole 1124 is within the projection of the diffuser section 1211. In other words, the diffuser section 1211 is generally funnel-shaped, converging from the surface of the counterweight module 12 toward the connecting section 1212. The maximum diameter of the diffuser section 1211 is larger than the diameter of the second through hole 1124, enabling rapid alignment with the second through hole 1124 and ensuring accurate airflow input or output. The connecting sections 1212 are distributed along the vertical direction, and the confluence sections 1213 are distributed along the length direction, so that each connecting section 1212 is connected to the delivery pipeline 123.

[0067] Preferably, an electromagnetic control valve is provided between the confluence section 1213 and the conveying pipeline 123, and the electromagnetic control valve is electrically connected to the main board or control module of the forklift or battery pack, so that the forklift can independently and intelligently control different battery modules, thereby enhancing safety and adjustability.

[0068] In one embodiment, the delivery pipeline 123 is disposed on a side of the confluence section 1213 close to the locking module 14. This arrangement prevents the delivery pipeline 123 from interfering with the sliding connection between the protective housing 11 and the counterweight module 12, thereby improving space utilization and enhancing the integration of the self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts.

[0069] In one embodiment, an insulating cushion is provided between the lithium battery cell 13 and the protective frame 112. The insulating cushion can prevent a gap from forming between the lithium battery cell 13 and the protective frame 112, thereby further enhancing vibration reduction and protection of the lithium battery cell 13.

[0070] like Figures 10-14 As shown, the present invention also provides a self-vibration-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts, comprising a mounting shell 2, a conveying fan 23 and any of the above-described self-vibration-damping battery modules 1 for converting lead-acid batteries to lithium batteries for forklifts. The self-vibration-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts and the conveying fan 23 are arranged in the mounting shell 2, and an air supply port 24 is provided on the mounting shell 2. The conveying fan 23 is connected to the air flow channel 121 and the air supply port 24 through a conveying pipeline 123.

[0071] Specifically, the conveying fan 23 adopts a bidirectional fan, so that the conveying fan 23 can supply air or exhaust air, thereby improving the adjustability of the device.

[0072] Specifically, the self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts is fixed in the mounting shell 2 through the original bracket or support (not shown in the figure), and the bracket or support is connected to the counterweight module 12. Screw holes or mounting holes can be set at the bottom of the counterweight module 12 to facilitate raising the counterweight module 12 or completing the installation.

[0073] In one embodiment, the mounting housing 2 is further provided with a vent 25, which is located above the first through hole 1123. The provision of the vent 25 allows airflow to circulate completely, preventing abnormal air pressure inside the mounting housing 2 and ensuring normal operation of the self-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts.

[0074] Preferably, a BMS mainboard 21 is provided on the top of the self-damping battery module 1 for converting lead-acid battery to lithium battery for forklift, a protection plate 22 is provided on the top of the BMS mainboard 21, and the electromagnetic control valve is electrically connected to the BMS mainboard 21.

[0075] Please refer to Figures 1 to 9 The first embodiment of the present invention is a self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts, comprising:

[0076] The protective shell 11 includes a top cover 111, a protective frame 112 and a heat-absorbing bottom plate 113. The top cover 111 is arranged on the top of the protective frame 112. The protective frame 112 is provided with a battery cavity; the bottom of the protective frame 112 is provided with a first stepped groove 1121 and a second stepped groove 1122 which are successively contracted inwards. The heat-absorbing bottom plate 113 is embedded in the first stepped groove 1121. The two side walls of the second stepped groove 1122 in the width direction are spaced apart with a first through hole 1123. The second stepped groove 1122 is provided with a first through hole 1123. Five second through holes 1124 are opened in the middle; ten T-shaped buffer members 115 are distributed in two rows at intervals on the bottom of the protective frame 112, each T-shaped buffer member 115 is provided with a supporting ring 116 and a T-shaped slider 117, and the T-shaped buffer member 115 includes a cylindrical portion 1151 and an extension portion 1152. The cylindrical portion 1151 extends from the bottom of the protective frame 112 in the vertical direction, and the extension portion 1152 is arranged on one side of the end of the cylindrical portion 1151, and the extension portion 1152 extends in the horizontal direction. Actuating rings 1153 are sleeved on the upper and lower sides of the extension 1152. A drive mechanism 1154 is located within the cylindrical portion 1151. The actuating rings 1153 are connected to the drive mechanism 1154 via a transmission slot 1155 on the cylindrical portion 1151. Driven by the drive mechanism 1154, the actuating rings 1153 rise and fall along the transmission slot 1155. Adjustment springs 118 are provided between the actuating rings 1153, the support ring 116, and the T-shaped slider 117. The drive mechanism 1154 is rigidly connected by two opposing ball screws, with the connection point located at the extension 1152. The portions of the actuating rings 1153 on the upper and lower sides of the extension 1152 that extend into the transmission slot 1155 are connected to the two opposing ball screws.

[0077] The counterweight module 12 is provided at the bottom of the protective frame 112 and is made of a single piece of metal counterweight. An airflow channel 121 is provided in the middle of the counterweight module 12. The airflow channel 121 corresponds to the second through hole 1124 and is connected to the outside via a delivery pipe 123. T-shaped chutes 122 are provided on both sides of the airflow channel 121. The T-shaped chutes 122 are distributed along the length of the counterweight module 12 and only pass through one side of the counterweight module 12. The T-shaped buffer 115 is slidably connected to the T-shaped chute 122, and the support ring 116 and the T-shaped slider 117 are respectively in contact with the upper and lower walls of the T-shaped chute 122.

[0078] The lithium battery cell 13 is arranged in the battery cavity, and the lithium battery cell 13 is in contact with the heat soaking bottom plate 113. In the vertical direction, the projection area of the heat soaking bottom plate 113 is within the projection area of the lithium battery cell 13; a longitudinal heat soaking plate is provided in the lithium battery cell 13, and the longitudinal heat soaking plate is in contact with the heat soaking bottom plate 113.

[0079] The locking module 14 includes a telescopic rod 141 and an arc-shaped rod 142. One end of the telescopic rod 141 is hinged to the side of the counterweight module 12 that is not penetrated by the T-shaped slot 122, and the other end of the telescopic rod 141 is hinged to the middle of the arc-shaped rod 142; one end of the arc-shaped rod 142 is hinged to the side of the counterweight module 12 that is not penetrated by the T-shaped slot 122, and the other end of the arc-shaped rod 142 is detachably connected to the protective frame 112; the telescopic rod 141 pulls the arc-shaped rod 142 and then drives the protective frame 112 to slide toward the side of the counterweight module 12 that is not penetrated by the T-shaped slot 122.

[0080] The outer surface of the protective frame 112 is provided with a thermal insulation layer. When the adjustment spring 118 is not compressed, the distance between the outer surface of the T-shaped slider 117 and the outer surface of the support ring 116 is greater than the distance between the upper and lower walls of the T-shaped chute 122. The ratio of the distance between the T-shaped buffer 115 and the T-shaped slider 117 to the distance between the T-shaped buffer 115 and the support ring 116 is 1:1.

[0081] The air flow channel 121 includes a diffusion section 1211, a connecting section 1212 and a confluence section 1213. The connecting section 1212 is arranged between the diffusion section 1211 and the confluence section 1213. The diffusion section 1211 gradually expands and extends from the connecting section 1212 to the side where the counterweight module 12 and the protective frame 112 are abutted. The confluence section 1213 is distributed along the length direction of the counterweight module 12 and is connected to the conveying pipeline 123; in the vertical direction, the projection area of the second through hole 1124 is within the projection area of the diffusion section 1211.

[0082] The detection module is disposed in the air flow channel 121 , includes a flow sensor and / or a temperature sensor, and is electrically connected to the driving mechanism 1154 .

[0083] In this embodiment, a heat dissipation fin 114 is provided below the heat-saturating bottom plate 113 . The heat dissipation fin 114 is arranged along the direction of the first through hole 1123 and in the second stepped groove 1122 .

[0084] In this embodiment, an electromagnetic control valve is provided between the confluence section 1213 and the delivery pipeline 123 , and the electromagnetic control valve is electrically connected to the mainboard of the battery pack.

[0085] The working principle of the present invention is as follows: during installation, the operator assembles the protective frame 112, the heat-saturating bottom plate 113 and the heat dissipating fins 114, then installs the lithium battery cell 13 and the top cover 111, and installs the detection module in the air flow channel 121. After completion, align the two rows of T-shaped buffers 115 with the T-shaped slide 122, pre-compress the support ring 116 and the T-shaped slider 117 in sequence, so that the support ring 116 and the T-shaped slider 117 are flush with the upper and lower walls of the T-shaped slide 122, and then push them into the T-shaped slide 122 from the through side. After all are pushed in, rotate the arc-shaped pull rod 142, stretch the telescopic pull rod 141, and screw the movable end of the arc-shaped pull rod 142 to the protective frame 112. Under the action of the telescopic pull rod 141, the arc-shaped pull rod 142 completes the locking of the protective frame 112 and the counterweight module 12, thus completing the installation of a set of self-damping battery modules 1 for converting lead-acid batteries to lithium batteries for forklifts.

[0086] Please refer to Figures 10 to 14 A second embodiment of the present invention is a self-vibration-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts, comprising a mounting housing 2, a conveying fan 23, and four sets of self-vibration-damping battery modules 1 for converting lead-acid batteries to lithium batteries for forklifts according to the first embodiment. The self-vibration-damping battery modules 1 for converting lead-acid batteries to lithium batteries for forklifts and the conveying fan 23 are disposed within the mounting housing 2. An air outlet 24 is provided on the mounting housing 2. The conveying fan 23 communicates with the air flow channel 121 and the air outlet 24 via a conveying pipe 123. The conveying fan 23 is a bidirectional fan.

[0087] The mounting housing 2 is further provided with a vent 25 , which is located above the first through hole 1123 .

[0088] In this embodiment, a BMS mainboard 21 is provided on the top of the self-damping battery module 1 for converting lead-acid batteries to lithium batteries for forklifts, a protective plate 22 is provided on the top of the BMS mainboard 21 , and the electromagnetic control valve is electrically connected to the BMS mainboard 21 .

[0089] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to simultaneously solve all the technical problems listed in the prior art or background art. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as limiting the claim.

[0090] Although this document frequently uses terms such as "self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts," "protective housing," and "top cover," the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention. The terms "first," "second," and so on (if any) in the description and claims of the embodiments of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts, characterized in that: include: A protective shell (11) comprises a top cover (111), a protective frame (112) and a heat-equalizing bottom plate (113), wherein the top cover (111) is arranged on the top of the protective frame (112), and a battery cavity is provided in the protective frame (112); a first stepped groove (1121) and a second stepped groove (1122) which are successively retracted are provided at the bottom of the protective frame (112), the heat-equalizing bottom plate (113) is embedded in the first stepped groove (1121), a first through hole (1123) is provided on the side wall of the second stepped groove (1122), and a second through hole (1124) is provided in the middle of the second stepped groove (1122); At least four T-shaped buffers (115) are provided at the bottom of the protection frame (112), and a supporting ring (116) and a T-shaped slider (117) are provided on the T-shaped buffer (115); the T-shaped buffer (115) comprises a columnar portion (1151) and an extension portion (1152); the columnar portion (1151) extends vertically from the bottom of the protection frame (112), and the extension portion (1152) is provided on one side of the end of the columnar portion (1151); the upper and lower sides of the extension portion (1152) An action ring piece (1153) is sleeved thereon, a driving mechanism (1154) is provided in the cylindrical portion (1151), the action ring piece (1153) is transmission-connected to the driving mechanism (1154) via a transmission groove (1155) on the cylindrical portion (1151), and the action ring piece (1153) is driven to rise and fall along the transmission groove (1155) by the driving mechanism (1154); an adjustment spring (118) is provided between the action ring piece (1153), the supporting ring (116), and the T-shaped slider (117); A counterweight module (12) is arranged at the bottom of the protective frame (112); an air flow channel (121) is provided in the middle of the counterweight module (12), the air flow channel (121) is arranged corresponding to the second through hole (1124), and the air flow channel (121) is connected to the outside through a conveying pipe (123); T-shaped grooves (122) are provided on both sides of the air flow channel (121), and the T-shaped grooves (122) are distributed along the length direction of the counterweight module (12) and only pass through one side of the counterweight module (12); the T-shaped buffer (115) is slidably connected to the T-shaped groove (122), and the support ring (116) and the T-shaped slider (117) are respectively in contact with the upper and lower wall surfaces of the T-shaped groove (122); A lithium battery cell (13) is disposed in the battery cavity, the lithium battery cell (13) abuts against the soaking plate (113), and in the vertical direction, a projection area of the soaking plate (113) is within a projection area of the lithium battery cell (13); a locking module (14), arranged on one side of the protection frame (112), and used to slide the protection frame (112) toward the side of the counterweight module (12) that is not penetrated by the T-shaped slide groove (122); A detection module is provided in the air flow channel (121), comprising a flow sensor and / or a temperature sensor, and the detection module is electrically connected to the driving mechanism (1154).

2. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 1, characterized in that: The supporting circular ring (116) is formed by enclosing at least two circular arc rings, and the adjustment spring (118) is respectively provided between each circular arc ring and the action ring piece (1153).

3. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 1, characterized in that: When the adjustment spring (118) is not under pressure, the distance from the outer surface of the T-shaped slider (117) to the outer surface of the support ring (116) is greater than the distance between the upper and lower walls of the T-shaped slide groove (122).

4. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 1, characterized in that: The locking module (14) includes a telescopic pull rod (141) and an arc-shaped pull rod (142), one end of the telescopic pull rod (141) is hinged to the side of the counterweight module (12) that is not penetrated by the T-shaped slide groove (122), and the other end of the telescopic pull rod (141) is hinged to the middle part of the arc-shaped pull rod (142); one end of the arc-shaped pull rod (142) is hinged to the side of the counterweight module (12) that is not penetrated by the T-shaped slide groove (122), and the other end of the arc-shaped pull rod (142) is detachably connected to the protection frame (112); the telescopic pull rod (141) pulls the arc-shaped pull rod (142) and thereby drives the protection frame (112) to slide toward the side of the counterweight module (12) that is not penetrated by the T-shaped slide groove (122).

5. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 1, characterized in that: A heat dissipation fin (114) is provided below the heat-saturating bottom plate (113), and the heat dissipation fin (114) is arranged along the opening direction of the first through hole (1123) and in the second stepped groove (1122).

6. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 1, characterized in that: The air flow channel (121) comprises a diffusion section (1211), a connecting section (1212) and a confluence section (1213); the connecting section (1212) is arranged between the diffusion section (1211) and the confluence section (1213); the diffusion section (1211) gradually expands and extends from the connecting section (1212) toward a side where the counterweight module (12) and the protective frame (112) abut against each other; the confluence section (1213) is distributed along the length direction of the counterweight module (12) and communicates with the delivery pipeline (123); in the vertical direction, the projection area of the second through hole (1124) is within the projection area of the diffusion section (1211).

7. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 6, characterized in that: The delivery pipeline (123) is arranged on a side of the confluence section (1213) close to the locking module (14).

8. The self-damping battery module for converting lead-acid batteries to lithium batteries for forklifts according to claim 1, characterized in that: An insulating buffer pad is provided between the lithium battery cell (13) and the protective frame (112).

9. A self-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts, characterized in that: The invention comprises a mounting shell (2), a conveying fan (23) and a self-vibration-damping battery module (1) for converting a lead-acid battery to a lithium battery for a forklift as claimed in any one of claims 1 to 8, wherein the self-vibration-damping battery module (1) for converting a lead-acid battery to a lithium battery for a forklift and the conveying fan (23) are arranged in the mounting shell (2), an air supply port (24) is provided on the mounting shell (2), and the conveying fan (23) is connected to the air flow channel (121) and the air supply port (24) through a conveying pipeline (123).

10. The self-damping battery pack for converting lead-acid batteries to lithium batteries for forklifts according to claim 9, characterized in that: A vent (25) is also provided on the mounting shell (2), and the vent (25) is arranged above the first through hole (1123).

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