Self-damping battery module and battery pack for forklift lead-acid-modified lithium battery

Abstract

The invention relates to the technical field of forklift batteries, in particular to a self-damping battery module for a forklift lead-acid-modified lithium battery and a battery pack. The self-damping battery module for the forklift lead-acid-modified lithium battery comprises a protective shell, a counterweight module, a lithium battery cell, a detection module and a locking module. According to the self-damping battery module for the lead-acid-to-lithium battery of the forklift, provided by the invention, the detection module is matched with the T-shaped buffer piece, and the temperature or the flow speed is detected in the airflow channel, so that the T-shaped buffer piece can actively strengthen the longitudinal tension on the protective shell according to different working states of the forklift during high-load operation of the forklift, and the protective shell is tightly attached to the counterweight module; a high-strength damping effect is provided, and the influence of the action of the forklift on the operation of the self-damping battery module for the lead-acid-modified lithium battery of the forklift is avoided; when the forklift runs at low load or the load of the adjusting spring is reduced, the overall service life is prolonged, and the use cost and the maintenance cost are reduced.

Description

Technical Field

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

[0002] Traditional forklifts generally use lead-acid batteries as the power source. However, lead-acid batteries have disadvantages such as low energy density, long charging time, short service life, high maintenance cost, and large environmental pollution. With the rapid development of lithium battery technology, its advantages such as high energy density, long cycle life, fast charging, maintenance-free, more intelligent with real-time monitoring and alarming, and environmental protection have become 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 newly purchased, the transformation cost is relatively high. If the lead-acid battery module is directly replaced with a lithium battery module, since the overall weight of the lithium battery module is relatively light, when converting a forklift lead-acid battery to a lithium battery, it is very easy to have safety hazards when the forklift forks heavy objects, and a counterweight mechanism needs to be added to adjust the overall center of gravity of the battery pack. At the same time, since lithium batteries have relatively high requirements for temperature and the stability of the use environment, a heat dissipation mechanism and a damping mechanism need to be added to the battery pack to protect the lithium battery module. By using this method, it is necessary to conduct targeted design for different specifications of battery packs and make significant adjustments to the internal structure of the battery pack, and a general solution cannot be formed, resulting in a large modification cost. 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 a forklift lead-acid battery to a lithium battery, and solve the problem that the existing lithium battery module cannot directly replace the lead-acid battery module in the forklift battery pack.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a self-damping battery module for converting a forklift lead-acid battery to a lithium battery, comprising: The protective housing includes a top cover, a protective frame body, and a heat dissipation bottom plate. The top cover is arranged on the top of the protective frame body, and a battery cavity is provided inside the protective frame body. At the bottom of the protective frame body, there are a first stepped groove and a second stepped groove that are successively retracted. The heat dissipation bottom plate is embedded in the first stepped groove. A first through hole is provided on the side wall of the second stepped groove, and a second through hole is provided in the middle of the second stepped groove. At least 4 T-shaped buffer members are provided at the bottom of the protective frame body. A support ring and a T-shaped slider are provided on the T-shaped buffer member. The T-shaped buffer member includes a cylindrical portion and an extended portion. The cylindrical portion extends vertically from the bottom of the protective frame body, and the extended portion is arranged on one side of the end of the cylindrical portion and extends horizontally. Action ring pieces are sleeved on the upper and lower sides of the extended portion. A driving mechanism is provided inside the cylindrical portion. The action ring pieces are in transmission connection with the driving mechanism through transmission grooves on the cylindrical portion. The action ring pieces are lifted and lowered along the transmission grooves under the drive of the driving mechanism. Adjustment springs are provided between the action ring pieces and the support ring and the T-shaped slider. The weight module is arranged at the bottom of the protective frame body. An air flow channel is provided in the middle of the weight module. The air flow channel is correspondingly arranged with the second through hole. The air flow channel is communicated with the outside through a conveying pipeline. T-shaped sliding grooves are provided on both sides of the air flow channel. The T-shaped sliding grooves are distributed along the length direction of the weight module and only penetrate one side of the weight module. The T-shaped buffer member is slidably connected with the T-shaped sliding groove. The support ring and the T-shaped slider are respectively abutted against the upper and lower wall surfaces of the T-shaped sliding groove. The lithium battery cell is arranged in the battery cavity. The lithium battery cell abuts against the heat dissipation bottom plate. In the vertical direction, the projection area of the heat dissipation bottom plate is within the projection area of the lithium battery cell. The locking module is arranged on one side of the protective frame body and is used to slide the protective frame body towards the side of the weight module that is not penetrated by the T-shaped sliding groove. The detection module is arranged in the air flow channel and is electrically connected with the driving mechanism, and includes a flow sensor and / or a temperature sensor.

[0006] In one embodiment, the support ring is formed by enclosing at least 2 arc rings, and adjustment springs are respectively provided between each arc ring and the action ring piece.

[0007] 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 support ring is greater than the distance between the upper and lower wall surfaces of the T-shaped sliding groove.

[0008] In one embodiment, the locking module includes a telescopic pull rod and an arc-shaped pull rod. One end of the telescopic pull rod is hinged to the side of the weight module that is not penetrated by the T-shaped sliding groove, and the other end of the telescopic pull rod is hinged to the middle of the arc-shaped pull rod. One end of the arc-shaped pull rod is hinged to the side of the weight module that is not penetrated by the T-shaped sliding groove, and the other end of the arc-shaped pull rod is detachably connected to the protective frame body. The telescopic pull rod pulls the arc-shaped pull rod to drive the protective frame body to slide towards the side of the weight module that is not penetrated by the T-shaped sliding groove.

[0009] In one embodiment, heat dissipation fins are provided below the heat sink base plate, and the heat dissipation fins are arranged in the second stepped groove along the opening direction of the first through hole.

[0010] In one embodiment, the air flow channel includes a diffusion section, a connection section and a confluence section. The connection section is arranged between the diffusion section and the confluence section. The diffusion section gradually expands and extends from the connection section to the side where the counterweight module abuts against the protection frame. The confluence section is distributed along the length direction of the counterweight module and is communicated with the conveying pipeline. Vertically, the projection area of the second through hole is within the projection area of the diffusion section.

[0011] In one embodiment, the conveying pipeline is arranged on the side of the confluence section close to the locking module.

[0012] In one embodiment, an insulating cushion is provided between the lithium battery cell and the protection frame.

[0013] The present invention also provides a self-damping battery pack for converting a forklift lead-acid battery to a lithium battery, which includes an installation housing, a conveying fan and the self-damping battery module for converting a forklift lead-acid battery to a lithium battery as described above. The self-damping battery module for converting a forklift lead-acid battery to a lithium battery and the conveying fan are arranged in the installation housing. An air outlet is provided on the installation housing, and the conveying fan is communicated with the air flow channel and the air outlet through the conveying pipeline.

[0014] In one embodiment, a ventilation opening is further opened on the installation housing, and the ventilation opening is arranged above the first through hole.

[0015] The beneficial effects of the present invention are as follows: 1. The self-damping battery module for converting a forklift lead-acid battery to a lithium battery provided by the present invention forms a built-in heat dissipation structure in the battery module by setting the protection frame of the first stepped groove and the second stepped groove, and cooperating with the heat sink base plate, and completes the air flow transportation through the first through hole and the second through hole. The structure is simple and stable, and is easy to maintain. While ensuring the heat dissipation effect, it can isolate the lithium battery cell from the outside world and ensure that the lithium battery cell is not affected by substances such as water vapor and dust in the environment during operation.

[0016] 2. The self-damping battery module for converting a forklift lead-acid battery to a lithium battery provided by the present invention sets an air flow channel in the counterweight module, so that the air flow can be communicated with the second stepped groove, and the air flow can flow along the air flow channel to complete the heat exchange with the heat sink base plate. While the counterweight module plays a counterweight role, it participates in the heat dissipation process, effectively improving the linkage effect between different modules and the integration of the self-damping battery module for converting a forklift lead-acid battery to a lithium battery, so that the self-damping battery module for converting a forklift lead-acid battery to a lithium battery can realize various protections for the lithium battery cell in a limited space and ensure the normal operation of the lithium battery cell.

[0017] 3. The self-damping battery module for converting lead-acid forklifts to lithium-ion batteries provided by the present invention, through the cooperation of the T-shaped buffer and the T-shaped chute, and the continuous pulling force provided by the locking module, keeps the protective housing and the counterweight module in a locked state, provides a limiting, damping and buffering effect on the overall lithium battery cells, ensures the alignment of the second through hole and the air flow channel, and ensures the normal progress of heat dissipation.

[0018] 4. The overall structure of the self-damping battery module for converting lead-acid forklifts to lithium-ion batteries provided by the present invention is stable, and it integrates functions such as counterweight, damping, and heat exchange by itself. While ensuring the operation stability, it has strong versatility, can directly replace the lead-acid battery module without modifying the main structure of the battery pack, greatly reduces the modification difficulty, reduces the cost, and has good promotion value.

[0019] 5. The self-damping battery module for converting lead-acid forklifts to lithium-ion batteries provided by the present invention, through the cooperation of the detection module and the T-shaped buffer, detects the temperature or flow rate in the air flow channel, so that the T-shaped buffer can actively strengthen the longitudinal pulling force on the protective housing according to different working states of the forklift. When the forklift is running at high load, the protective housing is tightly attached to the counterweight module, providing a high-strength damping effect to avoid the actions of the forklift affecting the operation of the self-damping battery module for converting lead-acid forklifts to lithium-ion batteries; when the forklift is running at low load or reducing the load of the adjusting spring, the overall working life is improved, and the use cost and maintenance cost are reduced.

[0020] 6. The self-damping battery pack for converting lead-acid forklifts to lithium-ion batteries provided by the present invention adopts a self-damping battery module for converting lead-acid forklifts to lithium-ion batteries with internal integrated heat exchange, damping and counterweight functions, can replace the lead-acid battery module on the overall frame of the original lead-acid battery pack, ensures the normal and stable operation of the lithium battery module during the operation process, can adapt to battery pack frames of different specifications, and greatly reduces the modification cost.

[0021] Other features and beneficial effects of the present invention will be described in the subsequent specification, and part of them will be obvious from the specification or understood by implementing the present invention. The objectives and other beneficial effects of the present invention can be realized and obtained through the structures and / or components pointed out in the specification and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of an embodiment of the present invention; Figure 2 is Figure 1 a partial enlarged view of part A in Figure 3 is a schematic internal structure diagram of the T-shaped buffer in an embodiment of the present invention; Figure 4 is a schematic structure diagram of the T-shaped buffer in an embodiment of the present invention; Figure 5Schematic structural diagram of the motion ring piece in an embodiment of the present invention; Figure 6 Cross-sectional view in the length direction of an embodiment of the present invention; Figure 7 Cross-sectional view in the width direction of an embodiment of the present invention; Figure 8 Stereo schematic diagram of the protection housing in an embodiment of the present invention; Figure 9 Stereo schematic diagram of the configuration module in an embodiment of the present invention; Figure 10 Stereo schematic diagram of another embodiment of the present invention; Figure 11 Is Figure 7 Stereo schematic diagram of the internal structure of the embodiment; Figure 12 Is Figure 7 Cross-sectional view in the length direction of the installation housing in the embodiment; Figure 13 Is Figure 7 Cross-sectional view in the length direction at another position of the installation housing in the embodiment; Figure 14 Is Figure 7 Cross-sectional view in the width direction of the embodiment.

[0023] Label description: 1. Self-damping battery module for converting forklift lead-acid battery to lithium battery; 11. Protection housing; 111. Top cover; 112. Protection frame; 1121. First stepped groove; 1122. Second stepped groove; 1123. First through hole; 1124. Second through hole; 113. Heat equalizing bottom plate; 114. Heat dissipation fins; 115. T-shaped buffer; 1151. Cylindrical part; 1152. Extension part; 1153. Motion ring piece; 1154. Driving mechanism; 1155. Transmission groove; 116. Support ring; 117. T-shaped slider; 118. Adjusting spring; 12. Weight module; 121. Air flow channel; 1211. Diffusion section; 1212. Connection section; 1213. Confluence section; 122. T-shaped sliding groove; 123. Delivery pipeline; 13. Lithium battery cell; 14. Locking module; 141. Telescopic pull rod; 142. Arc-shaped pull rod; 2. Installation housing; 21. BMS main board; 22. Protection board; 23. Delivery fan; 24. Air supply port; 25. Ventilation port. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The technical features designed in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0025] 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 commonly understood by those of ordinary skill in the technical field to which the present invention belongs, and should not be construed as limiting the present invention. It should be further understood that the terms used in the present invention should be understood as having meanings consistent with their meanings in the context of this specification and the relevant art, and should not be understood in an idealized or overly formal sense, unless clearly defined as such in the present invention.

[0026] To describe in detail the technical content, achieved objectives, and effects of the present invention, the following is described in conjunction with the embodiments and accompanied by the drawings.

[0027] Please refer to Figures 1 to 14 , a self-damping battery module 1 for converting a forklift lead-acid battery to a lithium-ion battery, comprising: a protection housing 11, a counterweight module 12, lithium battery cells 13, and a locking module 14.

[0028] The protection housing 11 includes a top cover 111, a protection frame 112, and a heat dissipation bottom plate 113. The top cover 111 is disposed on the top of the protection frame 112, and a battery cavity is provided inside the protection frame 112. At the bottom of the protection frame 112, a first stepped groove 1121 and a second stepped groove 1122 that are successively recessed are provided. The heat dissipation bottom plate 113 is embedded in the first stepped groove 1121. A first through hole 1123 is formed in the side wall of the second stepped groove 1122, and a second through hole 1124 is formed in the middle of the second stepped groove 1122. Specifically, after the heat dissipation bottom plate 113 is embedded, it is flush with the table surface of the first stepped groove 1121, so that the internal space of the protection frame 112 is divided into a battery cavity above the heat dissipation bottom plate 113 and a second stepped groove 1122 below the heat dissipation bottom plate 113. The first through hole 1123 is formed in the side wall of the second stepped groove 1122, and the second through hole 1124 is formed at the bottom of the second stepped groove 1122, that is, at the bottom of the protection frame 112, so that air 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, and the second stepped groove 1122 actually forms a heat exchange cavity.

[0029] At least four T-shaped buffer members 115 are provided at the bottom of the protection housing 112, and the T-shaped buffer members 115 are distributed at positions near the corners at the bottom of the protection housing 112. A support ring 116 and a T-shaped slider 117 are provided on the T-shaped buffer member 115. The T-shaped buffer member 115 includes a cylindrical portion 1151 and an extension portion 1152. The cylindrical portion 1151 extends vertically from the bottom of the protection housing 112, and the extension portion 1152 is provided on one side of the end of the cylindrical portion 1151 and extends horizontally. Action ring pieces 1153 are sleeved on the upper and lower sides of the extension portion 1152. A driving mechanism 1154 is provided in the cylindrical portion 1151. The action ring piece 1153 is in transmission connection with the driving mechanism 1154 through a transmission groove 1155 on the cylindrical portion 1151, and the action ring piece 1153 moves up and down along the transmission groove 1155 driven by the driving mechanism 1154; 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 arranged ball screws fixedly connected, and the connection point is 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 towards each other under the drive of one motor. More preferably, the driving mechanism 1154 can adopt four ball screws driven by a motor through a gear set, and each ball screw is connected to the action ring piece 1153.

[0030] The counterweight module 12 is arranged at the bottom of the protection housing 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 communicated with the outside through a conveying pipeline 123. Specifically, the conveying pipeline 123 can be connected to a forklift air conditioning component or a fan component, so that the forklift can convey cold air, hot air or air to the self-damping battery module 1 for converting lead-acid battery of forklift to lithium battery through the conveying pipeline 123, thereby ensuring that the temperature of the self-damping battery module 1 for converting lead-acid battery of forklift to lithium battery meets the requirements.

[0031] T-shaped sliding grooves 122 are provided on both sides of the air flow channel 121. The T-shaped sliding grooves 122 are distributed along the length direction of the counterweight module 12 and only penetrate through one side of the counterweight module 12; the T-shaped buffer member 115 is slidably connected with the T-shaped sliding groove 122, and the support ring 116 and the T-shaped slider 117 are respectively abutted against the upper and lower wall surfaces of the T-shaped sliding groove 122.

[0032] During actual use, the T-shaped slider 117 or the supporting ring 116 abuts against the upper and lower wall surfaces of the T-shaped chute 122. When the self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery is vibrated, the adjusting spring 118 is compressed, so that elastic force is continuously provided to the extension part 1152 through the adjusting spring 118 to buffer the vibration, enabling the T-shaped buffer 115 to quickly return to stability, thereby reducing the impact of the vibration on the whole, and at the same time being able to prevent the separation of the protection housing 11 and the counterweight module 12 caused by excessive vibration and ensuring the normal heat dissipation and ventilation. Those skilled in the art can adjust the elastic force of the adjusting spring 118 at different positions as needed to make the force on the T-shaped buffer 115 balanced, without specific limitation. Specifically, the side of the T-shaped chute 122 that does not penetrate the counterweight module 12 restricts the sliding direction of the T-shaped buffer 115, facilitating the operator to align.

[0033] The lithium battery cells 13 are arranged in the battery cavity. The lithium battery cells 13 abut against the heat dissipation bottom plate 113. In the vertical direction, the projection area of the heat dissipation bottom plate 113 is within the projection area of the lithium battery cells 13. That is, the size of the lithium battery cells 13 is larger than that of the heat dissipation bottom plate 113, and the edge of the lithium battery cells 13 abuts against the bottom of the protection frame 112, which can effectively prevent the heat dissipation effect from decreasing due to excessive force on the heat dissipation bottom plate 113.

[0034] The locking module 14 is arranged on one side of the protection frame 112 and is used to slide the protection frame 112 towards the side of the counterweight module 12 that is not penetrated by the T-shaped chute 122.

[0035] The detection module is arranged in the air flow channel 121 and includes a flow sensor and / or a temperature sensor, and is electrically connected to the driving mechanism 1154. Specifically, the detection module can be electrically connected to the control module of the forklift or the BMS main board 21. The control module of the forklift or the BMS main board 21 is connected to the lithium battery cells 13. At the same time, the driving mechanism 1154 is electrically connected to the lithium battery cells 13. The lithium battery cells 13 supply power to the driving mechanism 1154 and transmit the signals from the control module of the forklift or the BMS main board 21.

[0036] When the detection module detects that the temperature or air flow rate in the air flow channel 121 reaches the set value, it transmits a signal indicating that the forklift enters the high-load working state to the driving mechanism 1154. The driving mechanism 1154 is activated and drives the action ring 1153 to move away from the extension part 1152 and enter the enhanced vibration damping position, further compressing the adjustment spring 118, thereby enhancing the longitudinal force received by the protection housing 11, making the protection housing 11 closely adhere to the counterweight module 12. Thus, when the forklift enters the operating state, the protection housing 11 closely adheres to the counterweight module 12, while providing a high-strength vibration damping effect to prevent the actions of the forklift from affecting the operation of the self-vibration damping battery module for converting lead-acid batteries to lithium batteries in the forklift. When the forklift stops or is in a light-load working state, the power output decreases, and the detection module detects that the flow rate or temperature in the air flow channel 121 decreases to the set value, causing the driving mechanism 1154 to start running in the reverse direction, moving the action ring 1153 to both sides of the extension part 1152, reducing the load on the adjustment spring 118, increasing the working life of the adjustment spring 118, and reducing the use cost and maintenance cost.

[0037] It can be understood that the overall structure of the self-vibration damping battery module 1 for converting lead-acid batteries to lithium batteries in the forklift provided by the present invention is stable, and it integrates functions such as counterweight, vibration damping, and heat exchange. While ensuring the operation stability, it has strong versatility, can directly replace the lead-acid battery module without modifying the main structure of the battery pack, greatly reducing the modification difficulty and cost, and has good promotion value. At the same time, for the self-vibration damping battery module for converting lead-acid batteries to lithium batteries in the forklift provided by the present invention, through the cooperation of the detection module and the T-shaped buffer, the temperature or flow rate is detected in the air flow channel, enabling the T-shaped buffer to actively strengthen the longitudinal tension on the protection housing according to different working states of the forklift. When the forklift is running at high load, the protection housing closely adheres to the counterweight module, providing a high-strength vibration damping effect to prevent the actions of the forklift from affecting the operation of the self-vibration damping battery module for converting lead-acid batteries to lithium batteries in the forklift; when the forklift is running at low load or reducing the load on the adjustment spring, the overall working life is increased, and the use cost and maintenance cost are reduced.

[0038] Preferably, the counterweight module 12 can be an integral metal counterweight block, and the air flow channel 121 and the T-shaped sliding groove 122 are directly opened on the metal counterweight block. With this setting, the overall structure is stable and not affected by vibration. The counterweight module 12 can also be a stack of screwed metal counterweight blocks, and the air flow channel 121 and the T-shaped sliding groove 122 are opened in the topmost metal counterweight block. By increasing or decreasing the metal counterweight blocks at the bottom, the weight and height of the counterweight module 12 can be controlled, further improving the adaptability.

[0039] Preferably, a longitudinal heat sink plate is provided inside the lithium battery cell 13, and the longitudinal heat sink plate exchanges heat quickly with the heat sink bottom plate 113 to keep the overall temperature of the lithium battery cell 13 stable. With this setting, the heat exchange effect can be further enhanced.

[0040] Preferably, a heat insulation layer is provided on the outer surface of the protection housing 112. The heat insulation layer can prevent the abnormal temperature of the lithium battery cells 13 inside the single forklift lead-acid-to-lithium self-damping battery module 1 from affecting other battery modules, improving safety. At the same time, the heat insulation layer can enable the battery module to exchange heat only through the airflow in the second step groove 1122, ensuring the reliability of temperature regulation.

[0041] In one embodiment, the support ring 116 is formed by enclosing at least 2 arc rings, and an adjustment spring 118 is respectively arranged between each arc ring and the moving ring piece 1153). That is, the support ring 116 is arranged in sections, and the multiple arc rings independently buffer the acting forces in different directions, so that when the forklift lead-acid-to-lithium self-damping battery module 1 is subjected to small-area vibration or vibration in the inclined direction, the adjustment spring 118 can be compressed and deformed in time, thereby ensuring the buffering effect.

[0042] In one embodiment, when the adjustment spring 118 is not compressed, 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 wall surfaces of the T-shaped chute 122. With this setting, it can be ensured that after the protection housing 11 and the counterweight module 12 are matched, the moving ring piece 1153 can stably receive the acting forces of the T-shaped slider 117 and the support ring 116, ensuring the stability of the damping effect.

[0043] Preferably, when the adjustment spring 118 is not compressed, the ratio of the distance between the moving ring piece 1153 and the T-shaped slider 117 to the distance between the moving ring piece 1153 and the support ring 116 is 1-2:1. When the forklift vibrates, with this setting under the action of inertia, more adjustment margins can be provided for vertical vibration, enhancing the damping effect.

[0044] In one embodiment, 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 chute 122, and the other end of the telescopic pull rod 141 is hinged to the middle 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 chute 122, and the other end of the arc-shaped pull rod 142 is detachably connected to the protection housing 112; the telescopic pull rod 141 pulls the arc-shaped pull rod 142 to drive the protection housing 112 to slide towards the side of the counterweight module 12 that is not penetrated by the T-shaped chute 122. The arc-shaped pull rod 142 rotates against the pulling force of the telescopic pull rod 141 and is installed on the protection housing 112, and the telescopic pull rod 141 elongates to provide a continuous pulling force to the arc-shaped pull rod 142, and the pulling force causes the protection housing 112 to slide, and the non-penetrated part of the T-shaped chute 122 cooperates with the T-shaped guide post 115 to limit the position of the protection housing 112, thereby completing the overall alignment and locking.

[0045] In one embodiment, heat dissipation fins 114 are provided below the heat sink base plate 113, and the heat dissipation fins 114 are arranged along the opening direction of the first through hole 1123 and are disposed in the second stepped groove 1122. That is, the heat dissipation fins 114 are parallel to the air flow direction of the first through hole 1123, thereby preventing the heat dissipation fins 114 from interfering with the air flow. After the heat dissipation fins 114 are provided, the heat exchange process between the air flow and the heat sink base plate 113 can be accelerated, and the heat dissipation effect can be enhanced.

[0046] In one embodiment, the air flow channel 121 includes a diffusion section 1211, a connection section 1212, and a confluence section 1213. The connection section 1212 is disposed between the diffusion section 1211 and the confluence section 1213. The diffusion section 1211 gradually expands and extends from the connection section 1212 toward the side where the counterweight module 12 abuts against the protection frame 112. The confluence section 1213 is distributed along the length direction of the counterweight module 12 and is communicated 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. That is, the diffusion section 1211 is generally funnel-shaped and contracts from the surface of the counterweight module 12 toward the connection section 1212. The maximum diameter of the diffusion section 1211 is larger than the diameter of the second through hole 1124, so that quick alignment with the second through hole 1124 can be achieved, ensuring that the air flow can be accurately input or output. The connection section 1212 is distributed in the vertical direction, and the confluence section 1213 is distributed in the length direction, so that each connection section 1212 is communicated with the delivery pipeline 123.

[0047] Preferably, an electromagnetic control valve is provided between the confluence section 1213 and the delivery pipeline 123. The electromagnetic control valve is electrically connected to the main board or control module of the forklift or the battery pack, so that the forklift can perform independent intelligent control on different battery modules, enhancing safety and adjustability.

[0048] In one embodiment, the delivery pipeline 123 is disposed on the side of the confluence section 1213 close to the locking module 14. Such an arrangement can prevent the delivery pipeline 123 from interfering with the sliding connection between the protection housing 11 and the counterweight module 12, improve space utilization, and improve the integration of the self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery.

[0049] In one embodiment, an insulating cushion is provided between the lithium battery cell 13 and the protection frame 112. The insulating cushion can prevent a gap from being generated between the lithium battery cell 13 and the protection frame 112, and further strengthen the vibration damping and protection of the lithium battery cell 13.

[0050] As Figures 10 to 14As shown in the figure, the present invention further provides a self-damping battery pack for converting a forklift lead-acid battery to a lithium battery, which includes an installation housing 2, a delivery fan 23, and the self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery as described above. The self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery and the delivery fan 23 are arranged in the installation housing 2. An air outlet 24 is provided on the installation housing 2, and the delivery fan 23 is communicated with the air flow channel 121 and the air outlet 24 through a delivery pipeline 123.

[0051] Specifically, the delivery fan 23 adopts a two-way fan, so that the delivery fan 23 can blow air or extract air, improving the adjustable ability of the device.

[0052] Specifically, the self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery is fixed in the installation housing 2 through an original bracket or support (not shown in the figure). The bracket or support is connected to the counterweight module 12, and screw holes or mounting holes can be provided at the bottom of the counterweight module 12, so as to facilitate adding weight to the counterweight module 12 or completing the installation.

[0053] In an embodiment, a ventilation opening 25 is further opened on the installation housing 2, and the ventilation opening 25 is arranged above the first through hole 1123. The arrangement of the ventilation opening 25 enables the air flow to complete circulation, avoids abnormal air pressure inside the installation housing 2, and ensures the normal use of the self-damping battery pack for converting a forklift lead-acid battery to a lithium battery.

[0054] Preferably, a BMS main board 21 is provided on the top of the self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery, a protection board 22 is provided on the top of the BMS main board 21, and the electromagnetic control valve is electrically connected to the BMS main board 21.

[0055] Please refer to Figures 1 to 9 , Embodiment 1 of the present invention is: A self-damping battery module 1 for converting a forklift lead-acid battery to a lithium battery, including: The protective housing 11 includes a top cover 111, a protective frame 112 and a heat dissipation bottom plate 113. The top cover 111 is arranged on the top of the protective frame 112, and a battery cavity is arranged inside the protective frame 112. A first stepped groove 1121 and a second stepped groove 1122 which are successively retracted are arranged at the bottom of the protective frame 112. The heat dissipation bottom plate 113 is embedded in the first stepped groove 1121. First through holes 1123 are arranged at intervals on two side walls in the width direction of the second stepped groove 1122, and five second through holes 1124 are arranged in the middle of the second stepped groove 1122. Ten T-shaped buffer members 115 are distributed at intervals in two columns at the bottom of the protective frame 112. A support ring 116 and a T-shaped slider 117 are arranged on each T-shaped buffer member 115. The T-shaped buffer member 115 includes a cylindrical portion 1151 and an extended portion 1152. The cylindrical portion 1151 extends vertically from the bottom of the protective frame 112, and the extended portion 1152 is arranged on one side of the end of the cylindrical portion 1151 and extends horizontally. Moving ring pieces 1153 are sleeved on the upper and lower sides of the extended portion 1152. A driving mechanism 1154 is arranged inside the cylindrical portion 1151. The moving ring piece 1153 is in transmission connection with the driving mechanism 1154 through a transmission groove 1155 on the cylindrical portion 1151, and the moving ring piece 1153 moves up and down along the transmission groove 1155 driven by the driving mechanism 1154. An adjusting spring 118 is arranged between the moving ring piece 1153, the support ring 116 and the T-shaped slider 117. The driving mechanism 1154 is fixedly connected by two reverse ball screws, and the connection point is located at the extended portion 1152. The portions of the moving ring pieces 1153 on the upper and lower sides of the extended portion 1152 extending into the transmission groove 1155 are respectively connected with the two reverse ball screws.

[0056] The counterweight module 12 is arranged at the bottom of the protective frame 112 and is a whole metal counterweight block. An air flow channel 121 is arranged in the middle of the counterweight module 12. The air flow channel 121 is arranged corresponding to the second through holes 1124, and the air flow channel 121 is communicated with the outside through a conveying pipeline 123. T-shaped sliding grooves 122 are arranged on both sides of the air flow channel 121. The T-shaped sliding grooves 122 are distributed along the length direction of the counterweight module 12 and only penetrate through one side of the counterweight module 12. The T-shaped buffer members 115 are slidably connected with the T-shaped sliding grooves 122, and the support rings 116 and the T-shaped sliders 117 are respectively abutted against the upper and lower wall surfaces of the T-shaped sliding grooves 122. The lithium battery cell 13 is arranged in the battery cavity. The lithium battery cell 13 abuts against the heat dissipation bottom plate 113. In the vertical direction, the projection area of the heat dissipation bottom plate 113 is within the projection area of the lithium battery cell 13. A longitudinal heat dissipation plate is arranged inside the lithium battery cell 13, and the longitudinal heat dissipation plate abuts against the heat dissipation bottom plate 113.

[0057] 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 one side of the counterweight module 12 that is not penetrated by the T-shaped chute 122, and the other end of the telescopic pull rod 141 is hinged to the middle of the arc-shaped pull rod 142. One end of the arc-shaped pull rod 142 is hinged to one side of the counterweight module 12 that is not penetrated by the T-shaped chute 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 to drive the protection frame 112 to slide towards the side of the counterweight module 12 that is not penetrated by the T-shaped chute 122.

[0058] The outer surface of the protection frame 112 is provided with a heat insulation layer. When the adjusting spring 118 is not compressed, 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 wall surfaces 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.

[0059] The air flow channel 121 includes a diffusion section 1211, a connection section 1212, and a confluence section 1213. The connection section 1212 is arranged between the diffusion section 1211 and the confluence section 1213. The diffusion section 1211 gradually expands and extends from the connection section 1212 towards the side where the counterweight module 12 abuts against the protection frame 112. The confluence section 1213 is distributed along the length direction of the counterweight module 12 and is communicated with 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.

[0060] The detection module is arranged in the air flow channel 121 and includes a flow sensor and / or a temperature sensor, and is electrically connected to the driving mechanism 1154.

[0061] In this embodiment, heat dissipation fins 114 are provided below the heat equalizing bottom plate 113, and the heat dissipation fins 114 are arranged along the opening direction of the first through hole 1123 and are arranged in the second stepped groove 1122.

[0062] In this embodiment, 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 of the battery pack.

[0063] The working principle of the present invention is as follows: During installation, the operator assembles the protection frame 112, the heat sink base plate 113, and the heat dissipation fins 114. Then, the lithium battery cell 13 and the top cover 111 are installed, and the detection module is installed in the air flow channel 121. After completion, the two rows of T-shaped buffer members 115 are aligned with the T-shaped sliding grooves 122. The support ring 116 and the T-shaped slider 117 are sequentially compressed in advance to make the support ring 116 and the T-shaped slider 117 flush with the upper and lower wall surfaces of the T-shaped sliding groove 122, and then they are pushed into the T-shaped sliding groove 122 from the penetrating side. After all are pushed in, the arc-shaped pull rod 142 is rotated to stretch the telescopic pull rod 141, and the movable end of the arc-shaped pull rod 142 is screwed to the protection frame 112. The arc-shaped pull rod 142 locks the protection frame 112 and the counterweight module 12 under the action of the telescopic pull rod 141, that is, the installation of one set of self-damping battery module 1 for forklift lead-acid to lithium-ion conversion is completed.

[0064] Please refer to Figures 10 to 14 , Embodiment 2 of the present invention is: A self-damping battery pack for forklift lead-acid to lithium-ion conversion, including an installation housing 2, a delivery fan 23, and 4 sets of self-damping battery modules 1 for forklift lead-acid to lithium-ion conversion in Embodiment 1. The self-damping battery module 1 for forklift lead-acid to lithium-ion conversion and the delivery fan 23 are arranged in the installation housing 2. The installation housing 2 is provided with an air supply port 24. The delivery fan 23 is connected to the air flow channel 121 and the air supply port 24 through a delivery pipeline 123. The delivery fan 23 adopts a two-way fan.

[0065] The installation housing 2 is also provided with a ventilation port 25, and the ventilation port 25 is arranged above the first through hole 1123.

[0066] In this embodiment, a BMS main board 21 is arranged on the top of the self-damping battery module 1 for forklift lead-acid to lithium-ion conversion. A protection board 22 is arranged on the top of the BMS main board 21. The electromagnetic control valve is electrically connected to the BMS main board 21.

[0067] 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 can be improved only in one or several aspects, and it is not necessary to solve all the technical problems listed in the prior art or the background art at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation to that claim.

[0068] Although terms such as the self-damping battery module for converting a forklift lead-acid battery to a lithium-ion battery, the protective housing, and the top cover are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 a forklift lead-acid battery to a lithium-ion battery, characterized in that, Comprising: A protective housing (11), including a top cover (111), a protective frame (112) and a heat dissipation bottom plate (113). The top cover (111) is arranged on the top of the protective frame (112), and a battery cavity is provided inside the protective frame (112). At the bottom of the protective frame (112), a first stepped groove (1121) and a second stepped groove (1122) which are successively retracted are provided. The heat dissipation 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 4 T-shaped buffer members (115) are provided at the bottom of the protective frame (112). A support ring (116) and a T-shaped slider (117) are provided on the T-shaped buffer member (115). The T-shaped buffer member (115) includes a cylindrical portion (1151) and an extension portion (1152). The cylindrical portion (1151) extends vertically from the bottom of the protective frame (112), and the extension portion (1152) is arranged on one side of the end of the cylindrical portion (1151). Moving ring pieces (1153) are sleeved on the upper and lower sides of the extension portion (1152). A driving mechanism (1154) is provided inside the cylindrical portion (1151). The moving ring piece (1153) is in transmission connection with the driving mechanism (1154) through a transmission groove (1155) on the cylindrical portion (1151). The moving ring piece (1153) moves up and down along the transmission groove (1155) driven by the driving mechanism (1154). An adjusting spring (118) is provided between the moving ring piece (1153), the support ring (116) and the T-shaped slider (117). A weight module (12) is arranged at the bottom of the protective frame (112). An air flow channel (121) is provided in the middle of the weight module (12). The air flow channel (121) is arranged corresponding to the second through hole (1124). The air flow channel (121) is communicated with the outside through a conveying pipeline (123). T-shaped sliding grooves (122) are provided on both sides of the air flow channel (121). The T-shaped sliding grooves (122) are distributed along the length direction of the weight module (12) and only penetrate one side of the weight module (12). The T-shaped buffer member (115) is slidably connected with the T-shaped sliding groove (122), and the support ring (116) and the T-shaped slider (117) are respectively abutted against the upper and lower wall surfaces of the T-shaped sliding groove (122). A lithium battery cell (13) is arranged in the battery cavity. The lithium battery cell (13) is abutted against the heat dissipation bottom plate (113). In the vertical direction, the projection area of the heat dissipation bottom plate (113) is within the projection area of the lithium battery cell (13). A locking module (14) is arranged on one side of the protective frame (112) and is used to make the protective frame (112) slide towards the side of the weight module (12) that is not penetrated by the T-shaped sliding groove (122). The detection module is disposed within the air flow channel (121) and includes a flow sensor and / or a temperature sensor. The detection module is electrically connected to the driving mechanism (1154).

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

3. The self-damping battery module for converting a forklift lead-acid battery to a lithium-ion battery according to claim 1, characterized in that: When the adjustment spring (118) is not compressed, 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 wall surfaces of the T-shaped chute (122).

4. The self-damping battery module for converting a forklift lead-acid battery to a lithium-ion battery 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 a side of the counterweight module (12) that is not penetrated by the T-shaped chute (122), and the other end of the telescopic pull rod (141) is hinged to the middle of the arc-shaped pull rod (142); one end of the arc-shaped pull rod (142) is hinged to a side of the counterweight module (12) that is not penetrated by the T-shaped chute (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) to drive the protection frame (112) to slide towards a side of the counterweight module (12) that is not penetrated by the T-shaped chute (122).

5. The self-damping battery module for converting a forklift lead-acid battery to a lithium-ion battery according to claim 1, characterized in that: Heat dissipation fins (114) are provided below the heat dissipation bottom plate (113), and the heat dissipation fins (114) are arranged along the opening direction of the first through hole (1123) and are disposed within the second stepped groove (1122).

6. The self-damping battery module for converting a forklift lead-acid battery to a lithium-ion battery according to claim 1, characterized in that: The air flow channel (121) includes a diffuser section (1211), a connection section (1212), and a confluence section (1213). The connection section (1212) is disposed between the diffuser section (1211) and the confluence section (1213). The diffuser section (1211) gradually expands and extends from the connection section (1212) towards a side where the counterweight module (12) abuts against the protection frame (112). The confluence section (1213) is distributed along the length direction of the counterweight module (12) and is communicated with the conveying pipeline (123); in the vertical direction, the projection area of the second through hole (1124) is within the projection area of the diffuser section (1211).

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

8. The self-damping battery module for converting a forklift lead-acid battery to a lithium-ion battery according to claim 1, characterized in that: An insulating cushion is provided between the lithium battery cell (13) and the protection frame (112).

9. A self-damping battery pack for converting a forklift lead-acid battery to a lithium-ion battery, characterized in that, It includes an installation housing (2), a conveying fan (23), and the self-damping battery module for forklift lead-acid to lithium-ion conversion (1) according to any one of claims 1 to 8. The self-damping battery module for forklift lead-acid to lithium-ion conversion (1) and the conveying fan (23) are disposed within the installation housing (2). An air outlet (24) is provided on the installation housing (2). The conveying fan (23) is communicated with the air flow channel (121) and the air outlet (24) through the conveying pipeline (123).

10. The self-damping battery pack for converting a forklift lead-acid battery to a lithium-ion battery according to claim 9, characterized in that: The installation housing (2) is also provided with a ventilation opening (25), and the ventilation opening (25) is arranged above the first through hole (1123).

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