An intelligent multi-battery marine battery box

Abstract

The present invention belongs to the technical field of marine battery boxes, and mainly relates to an intelligent multi-battery marine battery box, including a box body, a plurality of battery position modules in parallel in the box body, each battery position module having a cavity, a battery position socket on the bottom of each cavity, a battery switching control board and a power output socket are also installed in the box body, the battery switching control board is provided with a storage module, a power monitoring module for collecting the power of each battery cell, a communication module and a power indicating module for indicating the power of each battery cell, the communication module is used for communication connection with an external control end, the power output socket is electrically connected with each battery position socket, and the storage module stores a battery switching program. An integral battery pack is divided into a plurality of independent battery cells, and when in use, the battery cells are switched through the battery switching program to ensure that the sailing speed is consistent when the ship is traveling.

Description

Technical Field

[0001] The invention belongs to the technical field of marine battery boxes, and mainly relates to an intelligent multi-battery marine battery box. Background Art

[0002] With the gradual maturity of related technologies of marine power battery systems, new energy ships have developed rapidly, and marine batteries have also developed rapidly.

[0003] A Chinese patent document with authorization announcement number CN209389106U discloses a marine battery box, which includes a box body, a box cover arranged on the box body, and a plurality of connector connection holes arranged in one side of the box cover, and a plurality of connectors used in conjunction with the plurality of connector connection holes, and handle mounting holes symmetrically arranged in both sides of the box cover, and a group of handles used in conjunction with the handle mounting holes in both sides, and a waterproof vent valve mounting hole arranged in the other side of the box cover, and a waterproof vent valve used in conjunction with the waterproof vent valve mounting hole; and a copper busbar installed on the mounting box and used in conjunction with the battery pack.

[0004] The battery pack in the above-mentioned marine battery box is a whole, large in size and heavy in weight. If the cruising time of the ship is to be extended, the battery capacity must be increased, but if the capacity is increased, the battery weight will increase. If the battery is removed and carried to the shore for charging, the weight of each battery is too heavy, which is not user-friendly for the staff to carry and is not conducive to the rapid assembly of the battery. If the battery is charged directly on the ship, the ship cannot travel during charging, and the charging time is slow, which creates conflicts in operating time.

[0005] Therefore, the above-mentioned marine battery box needs to be carried as a whole when in use, which is rather troublesome. Summary of the invention

[0006] The invention provides an intelligent multi-battery marine battery box to solve the problem of troublesome battery replacement in the prior art.

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] An intelligent multi-battery marine battery box includes a box body, a plurality of battery position modules connected in parallel are arranged in the box body, each battery position module has a cavity for installing a battery cell, and a battery position socket for electrically connecting to the battery cell is arranged on the bottom of each cavity, a battery switching control board and a power output socket are also installed in the box body, a storage module, a power monitoring module for collecting the power of each battery cell, a communication module and a power indicating module for indicating the power of each battery cell are arranged on the battery switching control board, the communication module is used for communication connection with an external control terminal, the power output socket is electrically connected to each battery position socket, the storage module stores a battery switching program, and the battery switching program executes the following switching method:

[0009] Divide the range of power level intervals, and divide the detected power of each battery cell into corresponding power level intervals;

[0010] According to the size of each power level range, the battery cells in different power level ranges are switched in order from high to low;

[0011] In the same power level interval, each battery cell is switched for use in sequence until the power of each battery cell in the power level interval is used up to the range of the next power level interval.

[0012] The invention has the following beneficial effects: an integral battery pack is divided into a plurality of independent battery cells, and when in use, the battery cells are switched through a battery switching program to ensure that the sailing speed of the ship is consistent when the ship is traveling, and when replacing battery cells, they can be replaced and carried one by one instead of carrying the whole together.

[0013] Furthermore, the cavity is inclined from bottom to top, and the cavity opening faces upward.

[0014] Furthermore, the upper side surface of the box body is an inclined surface, and the inclination direction of the inclined surface is consistent with the inclination direction of the cavity.

[0015] Furthermore, the box body is provided with an output sheet metal seat, on which a power output socket and a communication socket electrically connected to the battery switching control board are mounted, and the battery switching control board is used to electrically connect to an external control terminal through the communication socket.

[0016] The invention has the following beneficial effects: the battery box provides power to the power system of the vessel through the power output socket; the control end sends adjustment information through the communication socket according to the actual situation of the battery box, so that timely adjustment can be made in case of misoperation or other situations.

[0017] Furthermore, the box body is equipped with a lock hook and a box cover hinged thereon, the lock hook is connected to a knob installed on the box body, a lock hole is provided on the box cover, and the knob is rotated to insert the lock hook into the lock hole.

[0018] The invention has the following beneficial effects: the box cover can cover the battery cell inserted into the cavity to prevent the battery cell from contacting the external environment and better protect the battery cell; the knob can lock the box cover to the box body to prevent the box cover from loosening.

[0019] Furthermore, the box body is provided with a plurality of power indicator lights, the number of which is consistent with the number of battery position modules, the plurality of power indicator lights are electrically connected to the power indication module, and each power indicator light is used to indicate the remaining power of the corresponding single cell.

[0020] Furthermore, the battery cell includes a battery core, a shell sleeved on the battery core, an upper end cover, and a lower end cover. The upper end cover and the lower end cover are arranged at both ends of the shell to seal the shell. The upper end cover is provided with a handle, and the lower end cover is provided with an interface module electrically connected to the battery core. The battery socket is used to be inserted into the interface module.

[0021] Furthermore, the lower side of the shell has a protrusion, the lower side of the cavity has a groove, and the protrusion and the groove are slidably matched.

[0022] The invention has the following beneficial effects: through the sliding cooperation between the protrusion and the groove, it is used as a fool-proof design to prevent the battery cell from being placed at a wrong angle.

[0023] Furthermore, a nylon slide bar is provided on the side wall of the cavity provided with the groove, and the extension direction of the nylon slide bar is consistent with the sliding direction of the battery cell.

[0024] Furthermore, a fixing anchor plate for fixing to a vessel is provided at the bottom of the box.

[0025] The invention has the following beneficial effects: the box body is better fixed by fixing the anchor plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0027] Figure 1 It is a schematic diagram of the structure of the present invention installed on a vessel;

[0028] Figure 2 It is a structural schematic diagram of the first viewing angle of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the second viewing angle of the present invention;

[0030] Figure 4It is a structural schematic diagram of the present invention from a third viewing angle;

[0031] Figure 5 It is a structural schematic diagram of the fourth viewing angle of the present invention;

[0032] Figure 6 is a schematic structural diagram of the present invention from a fifth viewing angle (the box is not shown);

[0033] Figure 7 It is a structural schematic diagram of the present invention when the box cover is opened from a first viewing angle;

[0034] Figure 8 It is a structural schematic diagram of the second viewing angle when the box cover of the present invention is opened;

[0035] Fig. 9 It is a structural schematic diagram of the present invention when the box cover is opened from a third viewing angle;

[0036] Fig.10 for Fig. 9 The structural diagram of the box is omitted;

[0037] Fig.11 It is a schematic structural diagram of the battery cell of the present invention when it is taken out from the first perspective;

[0038] Fig.12 It is a structural schematic diagram of the second viewing angle when the battery cell of the present invention is taken out;

[0039] Fig.13 A schematic diagram of the structure of the battery cell of the present invention when it is taken out from a third viewing angle (the box body is not shown);

[0040] Fig.14 It is a structural schematic diagram of the battery module and the battery cell from the first perspective;

[0041] Fig.15 A schematic diagram of the structure of the battery module and the battery cell from a second viewing angle;

[0042] Fig.16 This is a schematic diagram of the explosion structure of a battery cell;

[0043] Fig.17 This is the block diagram of battery status monitoring.

[0044] Description of reference numerals:

[0045] 1. Vessel; 2. Battery box; 3. Box body; 4. Box cover; 5. Plug; 6. Communication socket; 7. Output sheet metal seat; 8. Fixed anchor plate; 9. Battery cell; 10. Cavity; 11. Protrusion; 12. Groove; 13. Nylon slide; 14. Battery position socket; 15. Battery position module; 16. Battery switching control board; 17. Lock hook; 18. Interface module; 19. Handle; 20. Battery core; 21. Shell; 22. Upper cover; 23. Lower cover; 24. Control module; 25. Communication module; 26. Battery monitoring unit; 27. Monitoring unit; 28. Control end; 29. ​​Lock hole; 30. Knob; 31. Power indicator light; 32. Storage module; 33. Monitoring module; 34. Power module. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0047] Various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0048] like Figure 1-Figure 13 As shown, an intelligent multi-battery marine battery box is used to be installed on a ship 1. The battery box 2 in this embodiment includes a box body 3, which has an opening. The box body 3 has a plurality of battery modules 15 of the same structure and connected in parallel. The battery modules 15 as independent modules are convenient for early production assembly and later use and maintenance. Multiple battery modules 15 are loaded into the box body 3 from the opening. Each battery module 15 has a cavity 10. The cavity 10 contains a battery cell 9. A battery socket 14 is provided on the bottom of the cavity 10 (the side opposite to the opening). The battery socket 14 and the battery cell 9 are directly plugged in to complete the electrical connection. A battery switching control board 16 is installed on the box body 3 in this embodiment. The battery switching control board 16 is electrically connected to each battery socket 14. The power supply of multiple battery cells 9 is controlled by the battery switching control board 16, and the status of the battery cells 9 is detected at the same time. The box body 3 is provided with a power output socket ( Figure 5 , the plug 5 is already plugged into the socket), and a plurality of battery sockets 14 are electrically connected to the power output socket.

[0049] By arranging a plurality of light-weight battery cells 9, each battery cell 9 is connected separately, and through the power output socket, a single battery cell 9 can supply power to the vessel 1, which will not affect the power supply of other battery cells 9; at the same time, when replacing the battery cell 9, the battery cell 9 can be directly inserted into the cavity 10 without the need for additional operations; only when a single battery cell 9 can supply power to the vessel 1 independently, and in combination with the direct plug-in installation of the battery cell 9, can the replacement of the battery cell 9 be facilitated; the battery cell 9 is light in weight, and after the power in the battery cell 9 is used up, it is also easy to carry.

[0050] A communication socket 6 is also installed on the box body 3 in this embodiment. The communication socket 6 is electrically connected to the battery switching control board 16 , and the communication socket 6 can also be connected to an external control terminal 28 .

[0051] The box body 3 in this embodiment is provided with an output sheet metal seat 7, and the communication socket 6 and the power output socket are both mounted on the output sheet metal seat 7. The output sheet metal seat 7 in this embodiment can better fix the communication socket 6 and the power output socket.

[0052] like Figure 6-Figure 8 As shown, in this embodiment, a box cover 4 is hinged on the box body 3, and the box cover 4 is hinged at the opening, and the box cover 4 is hinged on the lower side of the opening, so that the box cover 4 can be opened from the upper side. The hinged box cover 4 can cover the battery cell 9 inserted into the cavity 10, prevent the battery cell 9 from contacting the external environment, and better protect the battery cell 9. A lock hole 29 is provided on the box cover 4, and a lock hook 17 is installed on the box body 3. The lock hook 17 is connected to a knob 30 installed on the box body 3, and the knob 30 is rotated to insert the lock hook 17 into the lock hole 29. By inserting the lock hook 17 into the lock hole 29, the box cover 4 is locked to the box body 3 to prevent the box cover 4 from being loosened.

[0053] The bottom of the box body 3 is provided with a fixing anchor plate 8 for fixing to the vessel 1. The box body 3 is better fixed by the fixing anchor plate 8.

[0054] The box body 3 is provided with a plurality of power indicator lights 31 , the number of which is consistent with the number of the battery modules 15 , and each power indicator light 31 is used to indicate the remaining power of the corresponding single battery.

[0055] The cavity 10 in this embodiment is inclined from bottom to top, and the mouth of the cavity 10 faces upward, so that the battery cell 9 placed in the cavity 10 is also placed at an angle. The inclined design of the cavity 10, coupled with the drainage hole in the cavity 10, can prevent the battery cell 9 from falling off during use. At the same time, facing the outdoor rain environment, water can be discharged through the drainage hole in time. The upper side of the box body 3 is an inclined surface, and the inclination direction of the inclined surface is consistent with the inclination direction of the cavity 10. In this way, when the box body 3 is splashed with water, the water will easily flow from the inclined surface to the back side of the box body 3, so that the water will not flow to the box cover 4, reducing the probability of the battery cell 9 being corroded by water.

[0056] like Figure 14-16 As shown, the battery cell 9 includes a battery core 20, a shell 21 sleeved on the battery core 20, an upper end cover 22, and a lower end cover 23. The upper end cover 22 and the lower end cover 23 are disposed at both ends of the shell 21 to seal the shell 21. A handle 19 is provided on the upper end cover 22 to facilitate lifting and taking away the entire battery cell 9. An interface module 18 electrically connected to the battery core 20 is provided on the lower end cover 23. The interface module 18 is used to be inserted into the battery socket 14. The direct plug-in design eliminates the operation of connecting wires, thereby reducing the cost of use.

[0057] like Fig.11 , Fig.12 As shown, the lower side of the housing 21 has a protrusion 11, and the lower side wall of the cavity 10 is provided with a groove 12. When installing the battery cell 9, the protrusion 11 and the groove 12 slide together, so that the user can correctly put the battery cell 9 into the cavity 10 to prevent the battery cell 9 from being connected reversely. In order to place the battery cell 9 into the cavity 10 more smoothly, a nylon slide bar 13 is provided on the lower side wall of the cavity 10 with the groove 12, and the extension direction of the nylon slide bar 13 is consistent with the sliding direction of the battery cell 9.

[0058] The technical field of lithium battery box 2 covers several core points, which are summarized below with a clear structure and necessary data:

[0059] 1. Material selection:

[0060] Traditional materials: Early electric vehicle battery boxes were mostly made of steel, but due to its heavy weight, it affected the energy density of the battery pack and the battery life of the electric vehicle.

[0061] Aluminum alloy material: At present, aluminum alloy is widely used in battery box manufacturing due to its lightweight characteristics. The mainstream process is to extrude aluminum into profiles and then weld them. The tensile strength of mainstream aluminum profiles such as 6063 or 6016 is between 220 and 240 MPa, while the tensile strength of high-strength extruded aluminum profiles can reach more than 400 MPa.

[0062] 2. Structural design:

[0063] Components: The battery box structure is mainly used for support, resistance to mechanical shock, mechanical vibration and environmental protection (waterproof and dustproof).

[0064] Design considerations: The design of battery trays needs to consider load-bearing capacity, impact resistance and lightweight requirements. Extruded aluminum alloy battery trays have become mainstream due to their flexible design, convenient processing and easy modification.

[0065] 3. Welding technology:

[0066] Technology selection: The flatness and precision of the battery box require high welding technology. Mainstream welding technologies include friction stir welding (FSW), laser welding, bolt self-tightening technology (FDS) and adhesive bonding technology.

[0067] Friction stir welding (FSW): Due to its high welding strength and good sealing, it has become an important technology in the field of battery pack box 3 welding.

[0068] 4. Battery Management System (BMS):

[0069] Functional Overview: BMS is an important guarantee for the safe and efficient operation of lithium batteries. It ensures that the battery works in the best condition by real-time monitoring, prediction and regulation of battery status, avoiding unsafe situations such as overcharging, over-discharging and overheating.

[0070] 5. Safety performance:

[0071] Protection measures: The lithium battery box 2 must have multiple safety protection functions, such as leakage protection, over-temperature alarm, high-voltage protection, etc., to ensure the safety of the battery in various environments.

[0072] 6. Intelligence and customization:

[0073] Intelligence: It uses advanced computer control system to realize full monitoring and data collection of battery status, making it convenient for users to conduct data analysis and management.

[0074] Customization: The design of the battery box 2 can be customized according to user needs to meet the use requirements of lithium batteries of different specifications.

[0075] To sum up, the technical field of lithium battery box 2 involves material selection, structural design, welding technology, battery management system, safety performance, intelligence and customization. The continuous progress and optimization of these technologies provide a strong guarantee for the safe and efficient operation of lithium batteries.

[0076] like Fig.17As shown, the battery switching control board 16 in this embodiment is provided with a monitoring unit 27, a battery monitoring unit 26, a storage module 32, a control module 24 and a communication module 25. Among them, the monitoring unit 27 is externally connected to the battery cell 9 through the corresponding battery position module 15, and multiple monitoring units 27 are respectively connected to the corresponding multiple battery monitoring units 26 one by one. The monitoring unit 27 is connected to each battery cell 9 to realize the monitoring of each battery cell 9, ensuring the accuracy of the data of each battery cell 9 in the battery box 2. The damaged battery cell 9 can be timely known by the monitoring unit 27 to control the battery cell 9 separately without affecting the monitoring of other battery cells 9. The number of monitoring units 27 in this embodiment is the same as the number of battery position modules 15.

[0077] The battery monitoring unit 26 is used to monitor the usage status, power level, remaining power and temperature of the battery cell 9 externally connected to the monitoring unit 27. The battery monitoring unit 26 receives the parameter values ​​of the monitoring unit 27, and the parameter values ​​are the usage status, power level, remaining power and temperature of the battery cell 9. Multiple battery monitoring units 26 are connected to a storage module 32, and the storage module 32 stores a battery switching program. When the battery switching program is running, it executes a switching method for controlling the switching of the battery cell 9. At the same time, the storage module 32 can also be used to prevent the battery box 2 from opening more than one piece, which will cause different battery cells 9 to generate larger currents, causing danger and heat. The storage module 32 is connected to the control module 24 and controlled by it. The control module 24 receives detection signals from multiple battery monitoring units 26. The detection signals include the real-time status of each battery cell 9. The control module 24 processes the detection signals and sends control signals to one or more battery monitoring units 26. The control module 24 controls the corresponding battery monitoring units 26 based on the real-time status feedback of each battery cell 9. The communication module 25 receives the detection signals processed by the control module 24 and sends them to the control terminal 28 on the vessel 1 through the communication socket 6 for remote communication. The communication module 25 remotely feeds back the real-time status of each battery cell 9 obtained by the control module 24 to the control terminal 28 to realize The present invention provides a multiple detection mechanism for the battery; the control terminal 28 sends a command signal to the control module 24 through the communication module 25, and then remotely controls the battery monitoring unit 26. The command signal is the monitoring parameter of the battery monitoring unit 26 set at the control terminal 28. The monitoring parameter and parameter threshold of the battery monitoring unit 26 are set at the control terminal 28, and the battery monitoring unit 26 is remotely controlled through the communication module 25 and the control module 24. The degree of detection is adjusted according to the actual situation of the battery box 2, so that it can be adjusted in time in the event of misoperation or other situations. The battery box 2 can be manually controlled at the control terminal 28 to ensure the effective operation of the battery box 2, and the damaged battery cell 9 can be dealt with as soon as possible. The control terminal 28 is connected to a monitoring module 33, and the monitoring module 33 is used to protect the control terminal 28 from crashing. The control module 24 is electrically connected to a power module 34, and the power module 34 provides power to the control module 24, as well as overcurrent protection.

[0078] The monitoring module 33 is a watchdog module. The watchdog, also called a watchdog timer, is a timer circuit. The watchdog is a means of monitoring the operating status of the system, and the monitoring of the system operating status is achieved by combining software and hardware. The software that runs stably will feed the dog after executing a specific instruction. If the watchdog does not receive the feeding signal from the software within a certain period, it is considered that the system is faulty, and the interrupt handler will be entered or the system will be forced to reset. After the system is powered on, the timing of enabling the watchdog can be selected according to different working modes. If the watchdog is enabled, the counter starts counting. If the dog is not fed in time within the set time, the watchdog will time out. The watchdog is mainly composed of registers, counters and dog barking modules: the watchdog is basically set through the register, the counter calculates the dog barking time, and the dog barking module determines the interrupt or reset mode issued after the watchdog times out.

[0079] Each battery monitoring unit 26 includes a battery status monitoring module, a power monitoring module and a temperature monitoring module; wherein the battery status monitoring module is connected to the battery cell 9 and is used to monitor whether the battery box 2 is in use; the power monitoring module is connected to the battery status monitoring module and the battery cell 9 and is used to monitor the power value of the battery cell 9; the temperature monitoring module is connected to the battery cell 9 and is used to measure the temperature of the battery cell 9; the power indication module is connected to the battery cell 9 and is used to indicate the power of each battery cell 9, and multiple power indicator lights 31 are electrically connected to the power indication module.

[0080] When the battery box 2 is in use, the power monitoring module monitors the power of the battery cells 9 in real time, sends a prompt signal, and feeds back to the control terminal 28 through the control module 24 and the communication module 25. In addition, when the battery box 2 is not in use, the power monitoring module also feeds back the power value of the monitored battery cells 9 to the control module 24, and the control module 24 remotely sends it to the control terminal 28 through the communication module 25, so as to timely understand all the battery cells 9 in the battery box 2.

[0081] The battery switching control board 16 of the present invention monitors the usage status, power level, remaining power level and temperature of each battery cell 9 in the battery box 2, so as to achieve the purpose of automatically detecting the battery box 2, and transmits the real-time data of each battery cell 9 in the battery box 2 to the control end 28 remotely through the communication module 25 for real-time monitoring. The battery box 2 can also be manually controlled to ensure the effective operation status of the battery box 2 and avoid damage to the battery cells 9 when not in use.

[0082] The switching method for controlling the battery cell 9 to switch is:

[0083] The range of the power level interval is divided according to the percentage of power. For example, in this embodiment, 70%-100% is divided into the first power level, 40%-70% is divided into the second power level, 15%-40% is divided into the third power level, and 0%-15% is divided into the fourth power level. Then, the battery cells 9 in the battery box 2 are divided into corresponding power level intervals according to the power of each battery cell 9. For example, if the battery cell 9 has 81% power remaining, it is divided into the first power level; if the battery cell 9 has 56% power remaining, it is divided into the second power level; if the battery cell 9 has 70% power remaining, it is divided into the second power level and is not divided into the first power level; if the battery cell 9 has 40% power remaining, it is divided into the third power level and is not divided into the second power level. In other embodiments, the power level intervals can also be divided according to other numerical values.

[0084] In this embodiment, when using the battery cells 9, the battery cells 9 within the highest power level interval are preferentially used. If the battery cells 9 are within the first power level interval, each battery cell 9 within the first power level interval is used.

[0085] When the power of all the battery cells 9 in the first power level interval is consumed to 70%, the battery cells 9 in the second power level interval are used;

[0086] When the power of all the battery cells 9 in the second power level interval is consumed to 40%, the battery cells 9 in the third power level interval are used;

[0087] When the power of all battery cells 9 in the third power level interval is consumed to 15%, the battery cells 9 in the fourth power level interval are used, and a low power prompt is given to ensure that the remaining power can be returned to the shore.

[0088] If the battery cell 9 with the highest power level is in the second power level interval, then all battery cells 9 in the second power level interval will be used until the power levels of all battery cells 9 in the second power level interval are within the range of the next power level interval, and then the next equal interval will be switched in order from high to low according to the size of the range of each power level interval. The same goes for the others.

[0089] For each battery cell 9 within the same power level range, use one of the following methods:

[0090] ① If the power levels are the same, use the batteries in the order in which they are placed;

[0091] ② If the power levels are the same, use the battery cells 9 randomly;

[0092] ③ If the power levels are different, use the battery cells 9 in descending order;

[0093] ④ If the power levels are different, use the battery cells 9 randomly.

Claims

1. An intelligent multi-battery marine battery box, comprising a box body, characterized in that: The box body has a plurality of battery position modules connected in parallel, each of which has a cavity for installing a battery cell, and a battery position socket for electrically connecting to the battery cell is provided on the bottom of each cavity. A battery switching control board and a power output socket are also installed in the box body, and a storage module, a power monitoring module for collecting the power of each battery cell, a communication module, and a power indicating module for indicating the power of each battery cell are provided on the battery switching control board. The communication module is used for communication connection with an external control terminal, and the power output socket is electrically connected to each battery position socket. The storage module stores a battery switching program, and the battery switching program executes the following switching method: Divide the range of power level intervals, and divide the detected power of each battery cell into corresponding power level intervals; According to the size of each power level range, the battery cells in different power level ranges are switched in order from high to low; In the same power level interval, each battery cell is switched for use in turn until the power of each battery cell in the power level interval is used up to the range of the next power level interval; For each battery cell within the same power level range, use it in the following way: If the power levels are the same, use the batteries in the order in which they are placed. If the power levels are different, use the batteries in order from highest to lowest power.

2. The intelligent multi-battery marine battery box according to claim 1, characterized in that: The cavity is inclined from bottom to top, and the cavity opening faces upward.

3. The intelligent multi-battery marine battery box according to claim 2, characterized in that: The upper side surface of the box body is an inclined surface, and the inclined direction of the inclined surface is consistent with the inclined direction of the cavity.

4. The intelligent multi-battery marine battery box according to claim 3, characterized in that: The box body is provided with an output sheet metal seat, on which a power output socket and a communication socket electrically connected to the battery switching control board are mounted. The battery switching control board is used to electrically connect to an external control terminal through the communication socket.

5. The intelligent multi-battery marine battery box according to claim 4, characterized in that: The box body is equipped with a lock hook and a box cover hingedly connected thereto. The lock hook is connected to a knob installed on the box body. The box cover is provided with a lock hole. The knob is rotated to insert the lock hook into the lock hole.

6. The intelligent multi-battery marine battery box according to claim 5, characterized in that: The box body is provided with a plurality of power indicator lights, the number of which is consistent with the number of battery position modules, and the plurality of power indicator lights are electrically connected to the power indication module, and each power indicator light is used to indicate the remaining power of the corresponding single battery.

7. An intelligent multi-battery marine battery box according to any one of claims 1-6, characterized in that: The battery cell includes a battery core, a shell sleeved on the battery core, an upper end cover, and a lower end cover. The upper end cover and the lower end cover are respectively arranged at both ends of the shell to seal the shell. A handle is provided on the upper end cover, and an interface module electrically connected to the battery core is provided on the lower end cover. The battery socket is used to be inserted into the interface module.

8. The intelligent multi-battery marine battery box according to claim 7, characterized in that: The lower side of the shell is provided with a protrusion, the lower side of the cavity is provided with a groove, and the protrusion and the groove are slidably matched.

9. The intelligent multi-battery marine battery box according to claim 8, characterized in that: A nylon slide bar is provided on the side wall of the cavity provided with the groove, and the extending direction of the nylon slide bar is consistent with the sliding direction of the battery monomer.

10. An intelligent multi-battery marine battery box according to any one of claims 1-6, characterized in that: The bottom of the box is provided with a fixing anchor plate for fixing to a vessel.

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