Lithium battery device, automated guided vehicle and battery replacement system

Abstract

The present invention discloses a lithium battery device, an automated guided vehicle, and a battery replacement system, which relate to the technical field of batteries. The automated guided vehicle has a battery accommodation compartment. A first power connection terminal is provided on a first surface of the battery accommodation compartment, and an opening is provided on the opposite surface of the first surface; the first surface is parallel to the bottom surface of the automated guided vehicle. The lithium battery device includes: a lithium battery pack; a battery box. A second power connection terminal is provided on a first surface of the battery box, and a connection component is provided on a second surface of the battery box; the second power connection terminal is electrically connected to the lithium battery pack to achieve charging and discharging of the lithium battery pack; wherein, the first surface and the second surface of the battery box are opposite surfaces; when the first power connection terminal and the second power connection terminal are correspondingly connected, the second surface of the battery box corresponds to the opening of the battery accommodation compartment, so that the connection component on the second surface of the battery box is exposed at the opening of the battery box. The present invention aims to improve the convenience of power supply for the automated guided vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a lithium battery device, an automated guided vehicle, and a battery replacement system. Background Art

[0002] AGV (Automated Guided Vehicle) is a driverless vehicle widely used in the fields of industrial production, warehousing logistics, etc. It can autonomously travel along a predetermined path or instruction without a driver to complete tasks such as cargo handling and material distribution, so as to reduce labor costs. Among them, AGV usually uses a lithium battery device for power supply, and realizes the energy replenishment of AGV by replacing the battery or charging.

[0003] However, due to the structural design problem of the lithium battery device in the existing AGV, there are problems such as low replacement convenience, and the need to manually replace the lithium battery device, resulting in an imperfect overall automation degree of the system. Summary of the Invention

[0004] The main object of the present invention is to provide a lithium battery device, an automated guided vehicle, and a battery replacement system, aiming to improve the convenience of power supply for the automated guided vehicle.

[0005] To achieve the above object, a lithium battery device proposed by the present invention is applied to an automated guided vehicle, and is characterized in that the automated guided vehicle has a battery accommodation chamber, a first power connection end is provided on a first surface of the battery accommodation chamber, and an opening is provided on the opposite surface of the first surface; the first surface is parallel to the bottom surface of the automated guided vehicle; the lithium battery device includes:

[0006] A lithium battery pack;

[0007] A battery box, a second power connection end is provided on a first surface of the battery box, and a connection component is provided on a second surface of the battery box; the second power connection end is electrically connected to the lithium battery pack to realize the charging and discharging operation of the lithium battery pack;

[0008] Wherein, the first surface and the second surface of the battery box are opposite surfaces; when the first power connection end and the second power connection end are correspondingly connected, the second surface of the battery box corresponds to the opening of the battery accommodation chamber, so that the connection component on the second surface of the battery box is exposed at the opening of the battery box.

[0009] In one embodiment, the lithium battery device further includes a battery management device, and the battery management device includes:

[0010] A main control circuit;

[0011] A temperature detection circuit, the output end of the temperature detection circuit is electrically connected to the main control circuit, and the temperature detection circuit is used to output a temperature detection signal;

[0012] A heating component, the heating component is arranged in the lithium battery pack, and the heating component is electrically connected to the main control circuit;

[0013] Wherein, the main control circuit is used to output a heating control signal according to the temperature detection signal to control the heating component to work.

[0014] In one embodiment, the lithium battery device further includes a voltage conversion circuit, a first end of the voltage conversion circuit is electrically connected to the lithium battery pack, a second end of the voltage conversion circuit is electrically connected to the second power connection end, and the voltage conversion circuit is used to convert the input first voltage into a second voltage and output it.

[0015] In one embodiment, the second power connection end of the battery box includes:

[0016] A first voltage connection end, the first voltage connection end is electrically connected to the lithium battery pack, and the first voltage connection end is used to output a first voltage;

[0017] A second voltage connection end, the second voltage connection end is electrically connected to the output end of the voltage conversion circuit, and the second voltage connection end is used to output a second voltage.

[0018] In one embodiment, the main control circuit is specifically configured to:

[0019] When the lithium battery device is in a discharging state, control the first voltage connection end to output a first voltage, and after a preset time, control the second voltage connection end to output a second voltage;

[0020] When the lithium battery device is in a stopped discharging state, control the second voltage connection end to stop outputting the second voltage, and after a preset time, control the first voltage connection end to stop outputting the first voltage.

[0021] In one embodiment, the lithium battery device further includes a heat dissipation component, the heat dissipation component is arranged on one side of the battery box, the heat dissipation component is electrically connected to the main control circuit, and the heat dissipation component is used for heat dissipation of the voltage conversion circuit.

[0022] In one embodiment, a third power connection end is further arranged on the second surface of the battery box, and the third power connection end is electrically connected to the lithium battery pack.

[0023] In one embodiment, the lithium battery device further includes:

[0024] A power supply detection circuit, the input terminals of the power supply detection circuit are respectively electrically connected to the second power supply connection terminal and the third power supply connection terminal, the output terminal of the power supply detection circuit is electrically connected to the main control circuit, and the power supply detection circuit is used to detect the connection states of the second power supply connection terminal and the third power supply connection terminal, and output a connection detection signal;

[0025] A power supply connection switching circuit, the first end of the power supply connection switching circuit is electrically connected to the lithium battery pack, the second end of the power supply connection switching circuit is electrically connected to the second power supply connection terminal, the third end of the power supply connection switching circuit is electrically connected to the third power supply connection terminal, and the controlled end of the power supply connection switching circuit is electrically connected to the main control circuit;

[0026] Wherein, the main control circuit is further configured to control the power supply connection switching circuit to conduct the path between the second power supply connection terminal and the lithium battery pack and disconnect the path between the third power supply connection terminal and the lithium battery pack according to the connection detection signal; or, the main control circuit is further configured to control the power supply connection switching circuit to conduct the path between the third power supply connection terminal and the lithium battery pack and disconnect the path between the second power supply connection terminal and the lithium battery pack according to the connection detection signal.

[0027] The present invention also provides an automatic guided vehicle, and the automatic guided vehicle includes the lithium battery device as described in any one of the above.

[0028] Wherein, the automatic guided vehicle has a battery accommodation compartment, a first power supply connection terminal is provided on the first surface of the battery accommodation compartment, the opposite surface of the first surface is an opening, and the first surface is parallel to the bottom surface of the automatic guided vehicle.

[0029] The present invention also provides a battery replacement system, characterized in that the battery replacement system includes the automatic guided vehicle and a battery replacement device as described above;

[0030] Wherein, the battery replacement device has a traction replacement device corresponding to the connection component on the second surface of the battery box.

[0031] The technical solution of the present invention is to provide a battery accommodation bin in an automated guided vehicle, and a first power connection terminal is provided on the first side of the battery accommodation bin for connecting to a power source. Among them, the opposite side of the first side of the battery accommodation bin is an opening, and the size of the opening corresponds to the size of the lithium battery device. In addition, the first side of the battery accommodation bin is parallel to the bottom surface of the automated guided vehicle, so that the lithium battery device can be placed or removed in a direction perpendicular to the bottom surface of the automated guided vehicle. Further, the lithium battery device includes a lithium battery pack and a battery box. Among them, the lithium battery pack is arranged inside the battery box. A second power connection terminal is provided on the first side of the battery box, and the second power connection terminal is electrically connected to the lithium battery pack, so as to realize the charging and discharging of the lithium battery. A connection component is provided on the second side of the battery box, and the second side of the battery box corresponds to the opening of the battery accommodation cavity, so that the connection component on the second side of the battery box is exposed at the opening of the battery box, facilitating the quick placement and removal of the lithium battery device, and effectively improving the convenience of power supply for the automated guided vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0033] Figure 1 Structural schematic diagram of the lithium battery device of the present invention;

[0034] Figure 2 Module schematic diagram of an embodiment of the lithium battery device of the present invention;

[0035] Figure 3 Module schematic diagram of another embodiment of the lithium battery device of the present invention;

[0036] Figure 4 Structural schematic diagram of an embodiment of the lithium battery device of the present invention;

[0037] Figure 5 Module schematic diagram of yet another embodiment of the lithium battery device of the present invention.

[0038] Explanation of the reference numerals in the drawings:

[0039] A, second power connection terminal; B, connection component; C, third power connection terminal; D, heat dissipation component; 10, lithium battery pack; 20, main control circuit; 30, temperature detection circuit; 40, heating component; 50, voltage conversion circuit; 60, power detection circuit; 70, power connection switching circuit.

[0040] The implementation, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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 protection scope of the present invention.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0044] AGV (Automated Guided Vehicle) is a driverless vehicle widely used in the fields of industrial production, warehousing logistics, etc. They can autonomously drive along a predetermined path or instruction without a driver to complete tasks such as cargo handling and material distribution, so as to reduce labor costs. Among them, AGVs usually use lithium battery devices for power supply and achieve energy replenishment of AGVs by replacing the battery or charging.

[0045] However, due to the structural design problem of the lithium battery device in the existing AGV, there is a problem that the replacement convenience is relatively low, and the lithium battery device needs to be replaced manually, resulting in the problem that the overall automation degree of the system is imperfect.

[0046] To solve the above problems, refer to Figure 1, the present invention provides a lithium battery device applied to an automated guided vehicle (AGV). The AGV has a battery compartment, and a first power connection terminal is provided on a first surface of the battery compartment. The opposite side of the first surface is an opening. The first surface is parallel to the bottom surface of the AGV. The lithium battery device includes:

[0047] A lithium battery pack 10;

[0048] A battery box, on a first surface of which a second power connection terminal A is provided, and on a second surface of which a connection component B is provided. The second power connection terminal A is electrically connected to the lithium battery pack 10 to achieve the charging and discharging operation of the lithium battery pack 10.

[0049] Wherein, the first surface and the second surface of the battery box are opposite surfaces. When the first power connection terminal is correspondingly connected to the second power connection terminal A, the second surface of the battery box corresponds to the opening of the battery compartment, so that the connection component B on the second surface of the battery box is exposed at the opening of the battery box.

[0050] It can be understood that some AGVs have the need to quickly replace the battery in order to reduce the downtime during long-term operations and improve work efficiency. For example, in some 24 / 7 operating environments, in order to keep the AGV running continuously, a battery system that can be quickly replaced needs to be adopted. When the battery power of the AGV is low, the AGV will automatically go to a designated location to replace the fully charged battery without waiting for the battery to be slowly charged to full charge, thereby quickly and effectively improving work efficiency.

[0051] In this embodiment, the lithium battery pack 10 can be realized by using multiple lithium iron phosphate battery cells. Among them, lithium iron phosphate batteries are known for their high safety, long cycle life and good thermal stability, which makes them very suitable for constructing battery packs, especially in application scenarios that require stability and reliability, such as electric vehicles, energy storage systems, etc. In addition, the lithium battery pack 10 can also be realized by using lithium cobalt oxide battery cells. Further, to ensure that the AGV has sufficient power and efficiency, the battery cells in the lithium battery pack 10 are connected in series to increase the output voltage. Optionally, in this embodiment, taking the lithium battery pack 10 being realized by using multiple lithium iron phosphate battery cells as an example. To ensure that the AGV has sufficient power and efficiency, the nominal voltage output by the lithium battery pack 10 needs to be 76.8V. Among them, the nominal voltage of the lithium iron phosphate battery cell is 3.2V. Therefore, in order to achieve a total voltage of 76.8V, 24 lithium iron phosphate battery cells need to be connected in series. In addition, by using 24 lithium iron phosphate battery cells, a large capacity of 404Ah is also provided for the lithium battery pack 10, enabling the AGV to have sufficient endurance.

[0052] It is understandable that the lithium battery device is applied to an automated guided vehicle, and the battery accommodation compartment of the automated guided vehicle is provided with an opening parallel to the automated guided vehicle, which will expose the lithium battery device directly to the external environment. Therefore, the working environment of the lithium battery device may include various challenges in industrial scenarios, such as mechanical shock, vibration, humidity change, and temperature fluctuation, etc.

[0053] In this embodiment, the battery box can be made of metal materials, composite materials, engineering plastics, etc. Among them, metal materials can be realized by, for example, aluminum alloy, galvanized steel sheet, etc.; composite materials can be realized by glass fiber reinforced plastics, carbon fiber composite materials, etc.; engineering plastics can be realized by polycarbonate, ABS, etc. Optionally, in this embodiment, the lithium battery device needs to provide a relatively high voltage and a relatively large capacity for the automated guided vehicle, so metal materials, such as aluminum alloy, need to be given priority because they can not only provide the necessary physical protection but also have good thermal conductivity to help with heat dissipation. In addition, in order to improve certain specific performances (such as electromagnetic shielding, corrosion prevention, etc.), sometimes a coating or other types of protective layers are added on the basis of the metal shell. Further, the shape of the battery box needs to correspond to the battery accommodation compartment and the lithium battery pack 10. For example, if the battery accommodation compartment is a cuboid, the shape and size of the battery box need to be designed as a cuboid corresponding to the battery accommodation compartment. Among them, a second power connection terminal A is provided on the first surface of the battery box for electrically connecting with the first power connection terminal when the lithium battery device is placed in the battery accommodation compartment, so as to realize power supply for the AGV. In addition, a connection component B is provided on the second surface of the battery box, and the connection component B can be realized by a plug-in structure or a buckle structure. Further, the connection component B is provided on the second surface of the battery box, and the second surface of the battery box corresponds to the opening of the battery accommodation compartment, so that the connection component B can be directly connected to the traction replacement device of the external battery replacement device, thereby improving the replacement efficiency of the lithium battery device.

[0054] The technical solution of this application sets a battery accommodation chamber in the automatic guided vehicle, and sets a first power connection terminal on the first side of the battery accommodation chamber for accessing power. Among them, the opposite side of the first side of the battery accommodation chamber is an opening, and the size of the opening corresponds to the size of the lithium battery device. In addition, the first side of the battery accommodation chamber is parallel to the bottom surface of the automatic guided vehicle, so that the lithium battery device can place or remove the battery in the direction perpendicular to the bottom surface of the automatic guided vehicle. Further, the lithium battery device includes a lithium battery pack 10 and a battery box. Among them, the lithium battery pack 10 is arranged inside the battery box. A second power connection terminal A is arranged on the first side of the battery box, and the second power connection terminal A is electrically connected to the lithium battery pack 10, so as to realize the charging and discharging of the lithium battery. A connection component B is arranged on the second side of the battery box, and the second side of the battery box corresponds to the opening of the battery accommodation cavity, so that the connection component B on the second side of the battery box is exposed at the opening of the battery box, facilitating the quick placement and removal of the lithium battery device, and effectively improving the convenience of power supply for the automatic guided vehicle.

[0055] Reference Figure 1 and Figure 2 , in an embodiment of the present invention, the lithium battery device further includes a battery management device, and the battery management device includes:

[0056] A main control circuit 20;

[0057] A temperature detection circuit 30, the output end of the temperature detection circuit 30 is electrically connected to the main control circuit 20, and the temperature detection circuit 30 is used for outputting a temperature detection signal;

[0058] A heating component 40, the heating component 40 is arranged in the lithium battery pack 10, and the heating component 40 is electrically connected to the main control circuit 20;

[0059] Among them, the main control circuit 20 is used for outputting a heating control signal according to the temperature detection signal to control the heating component 40 to work.

[0060] In this embodiment, the main control circuit 20 can be implemented by a main controller, such as a SOC (System On Chip), an MCU (Microcontroller Unit), a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array chip), etc.

[0061] In this embodiment, the temperature detection circuit 30 can be implemented by a detection circuit based on a thermosensitive device, such as a resistive voltage division circuit based on an NTC resistor or an NTC probe, or a resistive voltage division circuit based on a PTC resistor or a PTC probe. Optionally, the temperature detection circuit 30 can also be implemented by a temperature sensor, such as an infrared temperature sensor, a thermocouple temperature sensor, etc. Among them, there can be multiple temperature detection circuits 30, and the multiple temperature detection circuits 30 can be arranged at different positions within the lithium battery pack 10. The main control circuit 20 can determine multiple temperature values based on multiple temperature detection signals, and calculate the actual operating temperature through a preset temperature algorithm, such as an average value, weighted calculation, etc., so as to improve the accuracy of detecting the operating temperature of the battery cells.

[0062] In this embodiment, the heating component 40 can be implemented by a heating resistance wire, a PTC heater, or an internal heating sheet. Among them, taking the heating component 40 as a heating resistance wire as an example. The heating resistance wire is arranged inside or around the lithium battery pack 10, and whether it is powered on is controlled by the main control circuit 20, so as to control whether heat is generated. Further, when the main control circuit 20 detects through the temperature detection circuit 30 that the temperature of the lithium battery pack 10 is lower than the preset value, the main control circuit 20 will output a corresponding heating control signal to control the heating resistance wire to be powered on, and detect through the temperature detection circuit 30 whether the current temperature of the lithium battery pack 10 reaches a temperature suitable for the operation of the lithium battery pack 10, so as to output a corresponding heating control signal to control the heating resistance wire to be powered off, avoiding the operating temperature of the lithium battery pack 10 from being too high.

[0063] Reference Figure 1 and Figure 3 and, in an embodiment of the present invention, the lithium battery device further includes a voltage conversion circuit 50. The first end of the voltage conversion circuit 50 is electrically connected to the lithium battery pack 10, and the second end of the voltage conversion circuit 50 is electrically connected to the second power supply connection end A. The voltage conversion circuit 50 is used to convert the input first voltage into a second voltage and output it.

[0064] It can be understood that AGVs usually adopt a DC power supply system because DC motors and related drive control systems have obvious advantages in terms of starting torque, speed regulation range, etc., and are suitable for applications such as AGVs that require precise control of speed and position. Therefore, the lithium battery device will output the power supply voltage corresponding to the DC motor and related drive control systems to facilitate the stable operation of the power system in the AGV. In addition, there are many other systems in the AGV vehicle, such as the control system, navigation and positioning system, and safety system. The power supply voltages required by such systems are all different from the power supply voltage required by the power system. For example, the power supply voltage required by the power system in the AGV is 76.8V, while the power supply voltage required by the control system is 5V or 12V; for another example, the power supply voltage required by the navigation and positioning system is also 5V or 12V. Therefore, in order to enable the lithium battery device to directly provide a higher DC voltage and a lower DC voltage for the AGV, a voltage conversion circuit 50 needs to be provided in the lithium battery device. Among them, the individual battery cells in the lithium battery pack 10 are connected in series in sequence and normally output a nominal voltage of 76.8V. Therefore, the voltage conversion circuit 50 needs to be implemented using a buck circuit, and the buck circuit can be implemented using a switching-mode buck converter, a switched-capacitor buck converter, a linear voltage regulator, etc. By electrically connecting the input end of the voltage conversion circuit 50 to the output end of the lithium battery pack 10, the first voltage output by the lithium battery pack 10 can be obtained; by electrically connecting the output end of the voltage conversion circuit 50 to the second power connection end A, the input first voltage can be converted and the second voltage can be output to the second power connection end A.

[0065] Optionally, the second power connection end A of the battery box includes:

[0066] A first voltage connection end, which is electrically connected to the lithium battery pack 10 and is used for outputting the first voltage;

[0067] A second voltage connection end, which is electrically connected to the output end of the voltage conversion circuit 50 and is used for outputting the second voltage.

[0068] In this embodiment, the second power connection terminal A needs to output a first voltage and a second voltage respectively. Among them, the second power connection terminal A includes a first voltage connection terminal and a second voltage connection terminal. The first voltage connection terminal is electrically connected to the lithium battery pack 10 to directly output the first voltage output by the lithium battery pack 10. The second voltage connection terminal is electrically connected to the output terminal of the voltage conversion circuit 50 to output the second voltage processed by the voltage conversion circuit 50. It can be understood that both the first power connection terminal and the second power connection terminal A are provided with positive and negative ports corresponding to different voltages, and the positive and negative ports corresponding to different voltages correspond to the first voltage connection terminal and the second voltage connection terminal, so that the second power connection terminal A can stably output the second voltage and the first voltage, and the first power connection terminal can stably receive the second voltage and the first voltage.

[0069] Optionally, the main control circuit 20 is specifically configured to:

[0070] When the lithium battery device is in the discharging state, control the first voltage connection terminal to output the first voltage, and after a preset time, control the second voltage connection terminal to output the second voltage;

[0071] When the lithium battery device is in the stopped discharging state, control the second voltage connection terminal to stop outputting the second voltage, and after a preset time, control the first voltage connection terminal to stop outputting the first voltage.

[0072] It can be understood that in the conventional power supply method, when the lithium battery device is in the discharging state, first control the second voltage connection terminal to output the second voltage, and after a preset time, then control the first voltage connection terminal to output the first voltage; when the lithium battery device is in the stopped discharging state, control the first voltage connection terminal to stop outputting the first voltage, and after a preset time, then control the second voltage connection terminal to stop outputting the second voltage. This method of first applying low voltage and then high voltage, and first reducing high voltage and then low voltage is a safer and more common practice. However, in this embodiment, the method of first applying high voltage and then low voltage, and first reducing low voltage and then high voltage is adopted, that is, the second power supply connection terminal first outputs the first voltage and then the second voltage, and first stops the output of the second voltage and then stops the output of the first voltage pair. As can be seen from the above, the first voltage is the power supply voltage of the power system in the AGV. Therefore, in the AGV application where the first voltage is output first and can respond quickly, such as emergency tasks or immediate requirements on the production line, directly connecting to the high voltage can accelerate the startup speed and make the AGV enter the working state faster.

[0073] Optionally, the lithium battery device further includes a heat dissipation component D, the heat dissipation component D is arranged on one side of the battery box, the heat dissipation component D is electrically connected to the main control circuit 20, and the heat dissipation component D is used for dissipating heat of the voltage conversion circuit.

[0074] It can be understood that the operation of the AGV requires multiple different supply voltages, while the lithium battery pack 10 with series-connected battery cells can only output one voltage, namely the first voltage. Therefore, a voltage conversion circuit 50 is necessarily required for the operation of the AGV to meet the supply voltages of different systems. Further, taking the process of converting a 76.8V high-voltage DC power supply into a 12V low-voltage DC power supply as an example, when different voltage conversion circuits 50 are adopted, the heat generated is also different. For example, using an efficient DC-DC converter (such as a switched-mode power supply, SMPS) can achieve a conversion efficiency of over 90%. This means that most of the input power can be effectively converted into output power, and only a small part of the energy is dissipated in the form of heat. While using a linear voltage regulator for bucking, since its working principle is to dissipate the excess energy through a resistor, the efficiency is relatively low, perhaps only 50%-60%, which will result in a large amount of heat generation. It can be understood that, regardless of whether a voltage conversion circuit 50 with a high conversion efficiency or a low conversion efficiency is adopted, certain heat will be generated. From the above content, it can be known that the automatic guided vehicle has a battery compartment, and the battery compartment has an opening. Therefore, by arranging the voltage conversion circuit 50 in the lithium battery device and further arranging a heat dissipation component D, the influence of the heat generated by the voltage conversion circuit 50 on the AGV and the lithium battery device can be effectively reduced. Among them, the heat dissipation component D can be realized by using a heat sink and a fan, etc. By connecting the controlled end of the fan to the main control circuit 20, the control of the fan operation by the main control circuit 20 is realized.

[0075] Reference Figure 4 and Figure 5 , in an embodiment of the present invention, a third power connection terminal C is further arranged on the second surface of the battery box, and the third power connection terminal C is electrically connected to the lithium battery pack 10.

[0076] In this embodiment, in practical applications, there may be some AGVs that do not require rapid replacement of the lithium battery device, or are unable to rapidly replace the lithium battery device. Therefore, a third power connection terminal C is further arranged on the second surface of the battery box, so that the lithium battery device on the AGV can perform charging and discharging operations through the third power connection terminal C. The AGV can not only achieve the charging operation of the lithium battery device through the third power connection terminal C, but also additionally set a module corresponding to the power interface, and realize power supply by connecting the third power connection terminal C. By arranging the third power connection terminal C, the flexibility of the AGV provided with the lithium battery device is effectively improved.

[0077] Optionally, the lithium battery device further includes:

[0078] A power supply detection circuit 60, the input ends of the power supply detection circuit 60 are electrically connected to the second power supply connection terminal A and the third power supply connection terminal C respectively, the output end of the power supply detection circuit 60 is electrically connected to the main control circuit 20, and the power supply detection circuit 60 is used for detecting the connection states of the second power supply connection terminal A and the third power supply connection terminal C and outputting a connection detection signal;

[0079] A power supply connection switching circuit 70, the first end of the power supply connection switching circuit 70 is electrically connected to the lithium battery pack 10, the second end of the power supply connection switching circuit 70 is electrically connected to the second power supply connection terminal A, the third end of the power supply connection switching circuit 70 is electrically connected to the third power supply connection terminal C, and the controlled end of the power supply connection switching circuit 70 is electrically connected to the main control circuit 20;

[0080] Wherein, the main control circuit 20 is further configured to control the power supply connection switching circuit 70 to conduct the path between the second power supply connection terminal A and the lithium battery pack 10 and disconnect the path between the third power supply connection terminal C and the lithium battery pack 10 according to the connection detection signal; or, the main control circuit 20 is further configured to control the power supply connection switching circuit 70 to conduct the path between the third power supply connection terminal C and the lithium battery pack 10 and disconnect the path between the second power supply connection terminal A and the lithium battery pack 10 according to the connection detection signal.

[0081] In this embodiment, the power supply detection circuit 60 can be implemented by a current detection circuit, a communication protocol circuit, a switch trigger circuit, etc. Among them, the power supply detection circuit 60 is implemented as a switch trigger circuit. By respectively arranging a switch trigger circuit at the second power supply connection terminal A and the third power supply connection terminal C, when the second power supply connection terminal A is plugged into the first power supply connection terminal, or when the third power supply connection terminal C is plugged into the charging interface and the load, the switch trigger circuit will output a connection detection signal corresponding to the second power supply connection terminal A or the third power supply connection terminal C, so that the main control circuit 20 can confirm the connection state of the second power supply connection terminal A or the third power supply connection terminal C according to the connection detection signal.

[0082] In this embodiment, the power connection switching circuit 70 can be implemented by multiple switching circuits, relays, or single-pole double-throw switching circuits. Among them, taking the power connection switching circuit 70 as a single-pole double-throw switching circuit as an example, the first end of the single-pole double-throw switching circuit is electrically connected to the lithium battery pack 10, the second end is electrically connected to the second power connection end A, the third end is electrically connected to the third power connection end C, and the controlled end is electrically connected to the main control circuit 20, so as to realize the path connection between the lithium battery pack 10 and the second power connection end A and the third power connection end C, and the control of the power connection switching circuit 70 by the main control circuit 20. Further, when the main control circuit 20 confirms that the second power connection end A is in the connected state according to the connection detection signal, it will output a corresponding switching control signal to the power connection switching circuit 70 to conduct the path between the lithium battery pack 10 and the second power connection end A and disconnect the path between the lithium battery pack 10 and the third power connection end C. When the main control circuit 20 confirms that the third power connection end C is in the connected state according to the connection detection signal, it will output a corresponding switching control signal to the power connection switching circuit 70 to conduct the path between the lithium battery pack 10 and the third power connection end C and disconnect the path between the lithium battery pack 10 and the second power connection end A.

[0083] Optionally, in practical applications, there is also a situation where both the second power connection end A and the third power connection end C are in the connected state. Therefore, the power connection switching circuit 70 needs to adopt a corresponding switching circuit that can simultaneously conduct the lithium battery pack 10 to the second power connection end A and the third power connection end C, and preset and adjust the control program in the main control circuit 20 to realize the charging and discharging operation of the lithium battery pack 10 through the second power connection end A and the third power connection end C at the same time.

[0084] The present invention also proposes an automatic guided vehicle, and the automatic guided vehicle includes the lithium battery device as described in any one of the above. Among them, the automatic guided vehicle has a battery accommodation chamber, a first power connection end is provided on the first surface of the battery accommodation chamber, an opening is provided on the opposite surface of the first surface, and the first surface is parallel to the bottom surface of the automatic guided vehicle. It should be noted that since the automatic guided vehicle of the present invention is based on the above lithium battery device, therefore, the embodiments of the automatic guided vehicle of the present invention include all the technical solutions of all the embodiments of the above lithium battery device, and the achieved technical effects are also exactly the same, which will not be elaborated here.

[0085] The present invention also provides a battery replacement system, which includes the automatic guided vehicle and the battery replacement device as described above; wherein, the battery replacement device has a traction replacement device corresponding to the connection component on the second surface of the battery box. It should be noted that since the battery replacement system of the present invention is based on the above automatic guided vehicle, therefore, the embodiments of the battery replacement system of the present invention include all the technical solutions of all the embodiments of the above automatic guided vehicle, and the achieved technical effects are also exactly the same, which will not be elaborated here.

[0086] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lithium battery device, applied to an automatic guided vehicle, characterized in that: The automatic guided transport vehicle has a battery storage compartment, a first surface of the battery storage compartment is provided with a first power connection terminal, and an opposite surface of the first surface is an opening; the first surface is parallel to the bottom surface of the automatic guided transport vehicle; the lithium battery device includes: Lithium battery pack; A battery box, wherein a first surface of the battery box is provided with a second power connection terminal, and a second surface of the battery box is provided with a connection component; the second power connection terminal is electrically connected to the lithium battery pack to realize charging and discharging of the lithium battery pack; The first surface of the battery box and the second surface of the battery box are opposite surfaces; when the first power connection terminal is connected to the second power connection terminal, the second surface of the battery box corresponds to the opening of the battery accommodating compartment, so that the connection component on the second surface of the battery box is exposed at the opening of the battery box; Furthermore, the lithium battery device further comprises a voltage conversion circuit, a first end of the voltage conversion circuit is electrically connected to the lithium battery pack, a second end of the voltage conversion circuit is electrically connected to the second power connection end, and the voltage conversion circuit is used to convert an input first voltage into a second voltage and output the second voltage; the second voltage is lower than the first voltage; The second power connection terminal of the battery box includes: A first voltage connection terminal, the first voltage connection terminal is electrically connected to the lithium battery pack, and the first voltage connection terminal is used to output a first voltage; a second voltage connection terminal, the second voltage connection terminal being electrically connected to the output terminal of the voltage conversion circuit, and the second voltage connection terminal being used to output a second voltage; The lithium battery device further includes a battery management device, and the battery management device includes a main control circuit, and the main control circuit is specifically configured as follows: When the lithium battery device is in a discharging state, controlling the first voltage connection terminal to output a first voltage, and after a preset time, controlling the second voltage connection terminal to output a second voltage; When the lithium battery device is in a stop-discharging state, controlling the second voltage connection terminal to stop outputting the second voltage, and after a preset time, controlling the first voltage connection terminal to stop outputting the first voltage; The second surface of the battery box is also provided with a third power connection terminal, and the third power connection terminal is electrically connected to the lithium battery pack.

2. The lithium battery device according to claim 1, characterized in that: The battery management device further comprises: A temperature detection circuit, wherein an output end of the temperature detection circuit is electrically connected to the main control circuit, and the temperature detection circuit is used to output a temperature detection signal; A heating component, the heating component is arranged in the lithium battery pack, and the heating component is electrically connected to the main control circuit; Wherein, the main control circuit is used to output a heating control signal according to the temperature detection signal to control the operation of the heating component.

3. The lithium battery device according to claim 1, characterized in that: The lithium battery device also includes a heat dissipation component, which is arranged on one side of the battery box, electrically connected to the main control circuit, and is used for heat dissipation of the voltage conversion circuit.

4. The lithium battery device according to claim 1, characterized in that: The lithium battery device also includes: a power detection circuit, wherein the input end of the power detection circuit is electrically connected to the second power connection end and the third power connection end respectively, and the output end of the power detection circuit is electrically connected to the main control circuit, and the power detection circuit is used to detect the connection status of the second power connection end and the third power connection end, and output a connection detection signal; A power connection switching circuit, wherein a first end of the power connection switching circuit is electrically connected to the lithium battery pack, a second end of the power connection switching circuit is electrically connected to the second power connection end, a third end of the power connection switching circuit is electrically connected to the third power connection end, and a controlled end of the power connection switching circuit is electrically connected to the main control circuit; In which, the main control circuit is also used to control the power connection switching circuit to connect the path between the second power connection terminal and the lithium battery pack and disconnect the path between the third power connection terminal and the lithium battery pack according to the connection detection signal; or, the main control circuit is also used to control the power connection switching circuit to connect the path between the third power connection terminal and the lithium battery pack and disconnect the path between the second power connection terminal and the lithium battery pack according to the connection detection signal.

5. An automated guided transport vehicle, characterized in that: The automatic guided transport vehicle comprises a lithium battery device as claimed in any one of claims 1 to 4; The automatic guided transport vehicle has a battery storage compartment, a first surface of the battery storage compartment is provided with a first power connection terminal, an opposite surface of the first surface is an opening, and the first surface is parallel to the bottom surface of the automatic guided transport vehicle.

6. A battery replacement system, characterized in that: The battery replacement system comprises a battery replacement device and an automated guided transport vehicle as claimed in claim 5; Wherein, the battery replacement device has a traction replacement device corresponding to the connection component on the second side of the battery box.

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