Battery system and thermal management control method

Abstract

The application relates to a battery system and a thermal management control method. The battery system comprises a sealed box, a fuel cell, a temperature sensor, a thermal control component and a control component. The sealed box comprises a containing cavity, the fuel cell is installed in the containing cavity, and the temperature sensor is arranged in the containing cavity and used for detecting temperature information in the containing cavity. The thermal control component is arranged in the containing cavity and used for adjusting the internal temperature of the sealed box. The thermal control component and the temperature sensor are respectively electrically connected to the control component, the control component is used for receiving a temperature signal sent by the temperature sensor, and the start and stop of the thermal control component are controlled according to the temperature signal. The battery system can automatically adjust the working state under different environmental temperatures, improves the output efficiency and service life of the fuel cell, and can ensure the smooth start and continuous operation of the fuel cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ocean buoys, and in particular to a battery system and a thermal management control method. BACKGROUND

[0002] In the use scenario of ocean buoys, due to the harsh marine environment, there are characteristics such as high humidity and high corrosion, therefore, the components of the ocean buoys often have a short service life. Taking fuel cells as an example, since the working efficiency of the fuel cell is largely affected by its working temperature, therefore, in the harsh marine environment, how to adjust the working temperature of the fuel cell while ensuring corrosion and moisture-proof is a research focus. SUMMARY

[0003] The present application provides a battery system and a thermal management control method to solve some or all of the deficiencies in the related art.

[0004] The present application provides a battery system, which comprises a sealed box body, a fuel cell, a temperature sensor, a thermal control component, and a control component. The sealed box body comprises a containing cavity, the fuel cell is installed in the containing cavity, and the temperature sensor is arranged in the containing cavity and used for detecting temperature information in the containing cavity. The thermal control component is arranged in the containing cavity and used for adjusting the internal temperature of the sealed box body. The thermal control component and the temperature sensor are respectively electrically connected to the control component, the control component is used for receiving a temperature signal sent by the temperature sensor, and the thermal control component is controlled to start or stop according to the temperature signal.

[0005] Optionally, the thermal control component comprises a first heating member, the number of the first heating members is multiple, and the first heating members are respectively arranged at the circumferential side of the fuel cell and used for heating the space at the circumferential side of the fuel cell.

[0006] Optionally, the battery system further comprises an air inlet, the air inlet is arranged on the side wall of the sealed box body, when the air inlet is opened, the containing cavity is in communication with the outside through the air inlet. When the fuel cell is in a working state, the air inlet is opened to communicate the containing cavity with the outside space, so as to provide oxygen for the fuel cell. When the fuel cell is in a non-working state, the air inlet is closed to separate the containing cavity from the outside space, so as to form a sealed containing cavity.

[0007] Optionally, the inner bottom surface of the sealed box body is downwardly recessed to form a sunken chamber in communication with the containing cavity, and the air inlet is arranged on the side wall of the sunken chamber. The thermal control component comprises a second heating member, the second heating member is arranged in the sunken chamber and used for heating the air inlet.

[0008] Optionally, the air inlet is electrically connected to the control assembly, and the control assembly controls opening and closing of the air inlet. The air inlet comprises a waterproof and air-permeable layer, and the waterproof and air-permeable layer is used for waterproof sealing when the control assembly controls opening of the air inlet.

[0009] Optionally, the air inlet comprises a waterproof and air-permeable layer, and the waterproof and air-permeable layer is used for waterproof sealing. When the fuel cell is in an operating state, external air enters the sealed box through the waterproof and air-permeable layer.

[0010] Optionally, the battery system further comprises an air outlet, the air outlet is arranged on the side wall of the accommodating cavity, one end of the air outlet is connected to the fuel cell, and the other end of the air outlet is in communication with the outside of the sealed box, and the air outlet is used for discharging fluid generated by combustion of the fuel cell.

[0011] Optionally, the thermal control assembly comprises a second heating member. The second heating member is arranged on the side wall of the accommodating cavity close to the air outlet, and is used for heating the air outlet.

[0012] Optionally, the thermal control assembly further comprises a heat dissipation member, the heat dissipation member comprises a medium storage box arranged outside the sealed box, and a heat exchanger and a pump body arranged in the sealed box, the heat exchanger and the pump body are in communication through a pipeline, the heat exchanger is attached to the surface of the fuel cell, one end of the pump body is connected to the heat exchanger, and the other end of the pump body is in communication with the medium storage box.

[0013] Optionally, the battery system further comprises a cover plate and a sealing member, and the sealed box further comprises a maintenance opening in communication with the accommodating cavity. The cover plate is arranged on the maintenance opening, and the sealing member is arranged on the circumferential side of the cover plate and located on the side of the cover plate facing the maintenance opening.

[0014] The application further provides a thermal management control method, which is applied to the battery system as described above and is executed by the control assembly. The thermal management control method comprises the following steps:

[0015] In response to a start signal of the fuel cell, temperature information in the accommodating cavity is acquired;

[0016] According to the temperature information, it is determined whether the start environment temperature of the fuel cell is lower than a minimum temperature threshold value;

[0017] When the start environment temperature of the fuel cell is lower than the minimum temperature threshold value, the thermal control assembly is controlled to be opened;

[0018] It is determined whether the start environment temperature of the fuel cell reaches a standard temperature threshold value;

[0019] When the ambient temperature in the fuel cell reaches the standard temperature threshold, the thermal control component is shut down, and the fuel cell is started.

[0020] Optionally, the thermal control assembly includes a first heating element, wherein there are multiple first heating elements, each disposed around the periphery of the fuel cell. Controlling the thermal control assembly to turn on includes:

[0021] Control the first heating element to turn on.

[0022] Optionally, the battery system further includes an air inlet, which is disposed on the side wall of the sealed enclosure. The thermal management control method further includes:

[0023] In response to the start signal of the fuel cell, the air inlet is controlled to open;

[0024] In response to a stop signal from the fuel cell, the air inlet is controlled to close.

[0025] Optionally, the thermal control assembly includes a second heating element. After controlling the air inlet to open, it further includes:

[0026] Detect the ambient temperature and operating status of the air inlet;

[0027] When the ambient temperature at the air inlet is lower than the minimum temperature threshold and the operating status is abnormal, the second heating element is activated.

[0028] Optionally, the battery system further includes an exhaust port disposed on the side wall of the accommodating cavity, one end of which is connected to the fuel cell, and the other end communicating with the outside of the sealed enclosure. The thermal control component includes a second heating element. The thermal management control method further includes:

[0029] In response to the start-up signal of the fuel cell, the pressure information inside the fuel cell and the ambient temperature of the exhaust port are acquired;

[0030] Based on the pressure information, determine whether the pressure inside the fuel cell is greater than the standard pressure threshold and whether the ambient temperature at the exhaust port is lower than the minimum temperature threshold.

[0031] When the pressure inside the fuel cell is greater than the standard pressure threshold and the ambient temperature at the exhaust port is lower than the minimum temperature threshold, the second heating element is activated.

[0032] Optionally, the battery system further includes a heat dissipation component disposed within the sealed enclosure. The thermal management control method further includes:

[0033] In response to the start signal of the fuel cell, the operating temperature information of the fuel cell is acquired;

[0034] determining whether the operating temperature of the fuel cell is higher than a maximum temperature threshold according to the operating temperature information;

[0035] controlling the heat dissipation member to be turned on when the operating temperature of the fuel cell is higher than the maximum temperature threshold.

[0036] The technical solutions provided by the embodiments of the present application can include the following beneficial effects:

[0037] As can be seen from the above embodiments, the battery system of the present application can adapt to various extreme working environments, such as strong wind, huge waves, heavy rain, salt spray corrosion, etc. in the marine environment, thereby ensuring the long-term stable operation of the system, effectively improving the environmental adaptability, practicality, stability and safety of the battery system. At the same time, it can also automatically adjust the working state under different environmental temperatures, ensure that the fuel cell is always in a better working temperature range, thereby improving its output efficiency and service life, and also ensuring the smooth start and continuous operation of the fuel cell.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 It is an exploded view of the structure of the battery system in an embodiment of the present application;

[0041] Figure 2 It is a schematic view of the internal structure of the battery system in an embodiment of the present application;

[0042] Figure 3 It is an assembly schematic view of the battery system in an embodiment of the present application;

[0043] Figure 4 It is a schematic view of the external structure of the sinking chamber of the battery system in an embodiment of the present application;

[0044] Figure 5 It is a schematic view of the pipeline connection of the battery system in an embodiment of the present application;

[0045] Figure 6 It is a part of the flow chart of the heat management control method in an embodiment of the present application;

[0046] Figure 7 For the complete flowchart of the thermal management control method in an embodiment of the present application.

[0047] Reference signs:

[0048] 1, battery system; 11, sealed box body; 111, accommodating cavity; 112, sunken cavity; 113, maintenance opening; 12, fuel cell; 121, fuel distributor; 122, fuel port; 13, thermal control assembly; 131, first heating member; 132, second heating member; 133, heat dissipation member; 1331, heat exchanger; 1332, pump body; 1333, medium storage tank; 14, control assembly; 15, air inlet; 16, air outlet; 17, cover plate; 18, sealing member. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments (or "modes of implementation") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings represent the same or similar elements unless otherwise indicated.

[0050] If the embodiments of the present application involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the embodiments of the present application involve the terms "first", "second", etc., which are only used for convenience of description and cannot be understood as indicating or implying relative importance.

[0051] The present application provides a battery system 1, which comprises a sealed box body 11, a fuel cell 12, a temperature sensor, a thermal control assembly 13, and a control assembly 14. The sealed box body 11 comprises an accommodating cavity 111, the fuel cell 12 is installed in the accommodating cavity 111, and the temperature sensor is arranged in the accommodating cavity 111 and used to detect temperature information in the accommodating cavity 111. The thermal control assembly 13 is arranged in the accommodating cavity 111 and used to adjust the internal temperature of the sealed box body 11. The thermal control assembly 13 and the temperature sensor are respectively electrically connected to the control assembly 14, the control assembly 14 is used to receive a temperature signal sent by the temperature sensor and control the start and stop of the thermal control assembly 13 according to the temperature signal.

[0052] As Figure 1As shown, the battery system 1 can adapt to various extreme working environments, such as strong wind, huge waves, heavy rain, salt spray corrosion, and other extreme working conditions, through the design of the sealed box 11, so as to ensure the long-term stable operation of the system, effectively improve the environmental adaptability, practicality, stability and safety of the battery system 1. At the same time, through the design of the temperature sensor, the thermal control component 13 and the control component 14, the battery system 1 can automatically adjust the working state under different environmental temperatures. For example, when the battery system 1 is applied to the polar region with high latitude, or winter, or night with large temperature difference, etc. Environmental conditions, the control component 14 can control the thermal control component 13 to work according to the temperature information detected by the temperature sensor, so as to heat the sealed box 11 to adjust the environmental temperature of the fuel cell 12 during operation, ensure that the fuel cell 12 is always within the optimal working temperature range, thereby improving its output efficiency and service life, and also ensuring the smooth start and continuous operation of the fuel cell 12. Correspondingly, when the battery system 1 is located in the equatorial zone, or in summer, or in the noon temperature is higher, due to long time exposure, the internal temperature of the sealed box 11 is higher, the control component 14 can control the thermal control component 13 to work according to the temperature information detected by the temperature sensor, so as to heat the sealed box 11 to adjust the environmental temperature of the fuel cell 12 during operation.

[0053] In optional embodiments, in combination with Figure 1 and Figure 2 As shown, the thermal control component 13 includes a first heating element 131, the number of the first heating element 131 is multiple, and is arranged on the side of the fuel cell 12, for heating the space around the fuel cell 12.

[0054] The battery system 1 of the present application can more uniformly heat the environment around the fuel cell 12 in the sealed box 11 by arranging multiple first heating elements 131 on the side of the fuel cell 12, thereby avoiding the problem of local overheating or overcooling of the fuel cell 12. At the same time, the design of multiple first heating elements 131 enables the battery system 1 to heat the fuel cell 12 to a more suitable working temperature range more quickly in a low-temperature environment, so that the battery system 1 starts faster in an extremely low-temperature environment, has stronger adaptability, and can operate stably for a long time without manual operation, meet the power demand of field terminal, and thereby improve its practicality and stability.

[0055] In optional embodiments, in combination with Figure 3 and Figure 4As shown, the battery system 1 further comprises an air inlet 15 arranged on the side wall of the closed box 11. When the air inlet 15 is opened, the accommodating cavity 111 is in communication with the outside through the air inlet 15. When the fuel cell 12 is in a working state, the air inlet 15 is opened to communicate the accommodating cavity 111 with the outside space, so as to provide oxygen for the fuel cell 12. When the fuel cell 12 is in a non-working state, the air inlet 15 is closed to separate the accommodating cavity 111 from the outside space, so as to form a closed accommodating cavity 111.

[0056] The provision of the air inlet 15 in the battery system 1 can ensure sufficient oxygen supply for the fuel cell 12 during working, thereby improving the working efficiency of the fuel cell 12. Meanwhile, when there is a pressure difference between the inside and outside of the accommodating cavity 111, the air inlet 15 can be timely opened to balance the pressure difference, thereby ensuring the safety of the battery system 1. In addition, when the fuel cell 12 is in a non-working state, the air inlet 15 is closed, thereby effectively preventing harmful substances such as outside moisture and salt mist from entering the accommodating cavity 111, and thereby protecting the fuel cell 12 and other internal components in the accommodating cavity 111, thereby significantly improving the environmental adaptability, safety and stability of the battery system 1. In addition, during the working process of the battery system 1, the air inlet 15 can always prevent liquid from entering, thereby ensuring the dryness of the internal environment of the accommodating cavity 111, and effectively reducing the occurrence of moisture and rust of internal components.

[0057] It should be noted that in the actual application scenario of the battery system 1, the air inlet 15 can be designed as an active opening and closing type, i.e., the air inlet 15 is electrically connected to the control component 14, and the opening and closing of the air inlet 15 is controlled by the control component 14. Of course, it can also be designed as a passive opening and closing type, for example, during the operation of the battery system 1, as the pressure in the cavity of the accommodating cavity 111 changes, outside air can enter the closed box 11 through the air inlet 15 due to the change of the internal and external pressure difference. Therefore, the specific design scheme of the air inlet 15 is not limited in the present application. In the active and passive schemes, the air inlet 15 can be provided with a waterproof and breathable layer, which can allow air to pass through while preventing liquid from passing through. In this way, when the active air inlet 15 is used, due to the presence of the waterproof and breathable layer, liquid outside the closed box 11 cannot pass through the waterproof and breathable layer to enter the closed box 11. Meanwhile, when the passive air inlet 15 is used, as the fuel cell 12 normally works, outside air can enter the closed box 11 through the air inlet 15 due to the change of the internal and external pressure difference, but at the same time, liquid outside cannot enter the closed box 11, thereby achieving the effect of waterproof and breathability.

[0058] In an optional embodiment, the inner bottom of the sealed box body 11 is concave downward to form a sunken chamber 112 communicating with the accommodating cavity 111, and the air inlet 15 is arranged on the side wall of the sunken chamber 112. The thermal control assembly 13 comprises a second heating element 132 arranged in the sunken chamber 112 for heating the air inlet 15.

[0059] When the battery system 1 works in a relatively cold environment, icing, snow accumulation and the like may occur on the air inlet 15 due to the partial structure of the air inlet 15 exposed outside the accommodating cavity 111, resulting in the air inlet 15 unable to normally open or close. In combination with the description of the air inlet 15 arranged on the side wall of the sunken chamber 112 and the second heating element 132 arranged in the sunken chamber 112 for heating the air inlet 15, the design of the present application enables the battery system 1 to timely open the second heating element 132 to heat the air inlet 15 when icing, snow accumulation and the like occur, so as to melt the ice and snow and ensure the normal work of the air inlet 15. Figure 2 and Figure 4 The design of the first heating element 131 and the second heating element 132 enables the battery system 1 to have preheating capability, thereby ensuring that the battery system 1 can still maintain normal and efficient work efficiency in an extremely low-temperature environment, and significantly improves the adaptability of the battery system 1. In addition, the design also ensures that the battery system 1 can be stably operated for a long time in an unattended manner, meets the power demand of a field terminal, and further improves the practicality and stability.

[0060] As can be seen, the cooperation of the first heating element 131 and the second heating element 132 enables the battery system 1 to have preheating capability, thereby ensuring that the battery system 1 can still maintain normal and efficient work efficiency in an extremely low-temperature environment, and significantly improves the adaptability of the battery system 1. In addition, the design also ensures that the battery system 1 can be stably operated for a long time in an unattended manner, meets the power demand of a field terminal, and further improves the practicality and stability.

[0061] In an optional embodiment, as shown in Figure 4 The battery system 1 further comprises an air outlet 16 arranged on the side wall of the accommodating cavity 111, one end of the air outlet 16 is connected to the fuel cell 12, the other end communicates with the outside of the sealed box body 11, and the air outlet 16 is used for discharging the fluid generated by the combustion of the fuel cell 12.

[0062] The present application enables the battery system 1 to timely discharge the exhaust gas and other fluids (such as water vapor, unreacted fuel, etc.) generated by the combustion of the fuel cell 12, thereby preventing the accumulation of the exhaust gas and other fluids in the sealed box body 11, effectively reducing the safety hazard of the battery system 1, and ensuring the safety and stability of the system. At the same time, the design of the air outlet 16 can also avoid the interference of the exhaust gas on the fuel cell 12, thereby effectively improving the work efficiency of the fuel cell 12, ensuring the efficient operation of the fuel cell 12, and further improving the energy efficiency performance of the battery system 1.

[0063] In an optional embodiment, the second heating element 132 is arranged in the accommodating cavity 111 close to the side wall of the air outlet 16 for heating the air outlet 16.

[0064] Similarly, since part of the structure of the exhaust port 16 is exposed outside the accommodating cavity 111, when the battery system 1 works in a colder environment, the exhaust port 16 may be blocked by ice or snow, resulting in its failure to work normally. However, the battery system 1 of the present application sets the second heating member 132 in the accommodating cavity 111 close to the side wall of the exhaust port 16, so that when the second heating member 132 works, the exhaust port 16 can be heated by means of heat radiation and heat conduction to avoid being blocked. As can be seen, the design of the second heating member 132 not only can heat the accommodating cavity 111, but also can de-ice and melt snow for the air inlet 15 and the exhaust port 16, further improving the adaptability, practicality and stability of the battery system 1.

[0065] In optional embodiments, in combination with Figure 3 and Figure 5 As shown, the battery system 1 further comprises a heat dissipation member 133, which comprises a medium storage tank 1333 arranged outside the sealed box body 11 and a heat exchanger 1331 and a pump body 1332 arranged in the sealed box body 11. The heat exchanger 1331 and the pump body 1332 are communicated through a pipeline. The heat exchanger 1331 is attached to the surface of the fuel cell 12. One end of the pump body 1332 is connected to the heat exchanger 1331, and the other end is communicated with the medium storage tank 1333.

[0066] The fuel cell 12 generates heat and a large amount of hot air during the working process, resulting in the temperature rise inside the sealed box body 11. In order to avoid the temperature rise inside the sealed box body 11, the battery system 1 of the present application sets the heat dissipation member 133 to dissipate the heat generated by the fuel cell 12. Figure 5In the shown embodiment, the battery system 1 draws the cooling medium in the medium storage tank 1333 into the heat exchanger 1331 through the pipeline shown by the blue line via the pump body 1332. Since the heat exchanger 1331 directly contacts the surface of the fuel cell 12, it can quickly take away the heat generated in the working process of the fuel cell 12, and when the hot air in the sealed tank body 11 passes through the heat exchanger 1331, heat exchange can also be performed, thereby reducing the temperature of the hot air, achieving temperature control of the fuel cell 12 and the accommodating cavity 111, ensuring that the working temperature of the fuel cell 12 is maintained within a stable range, and avoiding the situation that the performance is reduced or the battery is damaged due to overheating. It should be noted that in the embodiments described in the present application, the heat dissipation member 133 not only includes an active heat exchange and heat dissipation system, but also includes a passive heat dissipation system. Specifically, the sealed tank body 11 is made of an aluminum alloy material, and a black anodized layer is arranged on the inner wall of the sealed tank body 11, thereby further improving the convection and radiation heat dissipation efficiency and the heat dissipation capacity of the battery system 1. Therefore, in alternative embodiments, the heat dissipation member 133 can be designed to include both an active heat dissipation system and a passive heat dissipation system. Of course, according to actual needs, only an active heat dissipation system or only a passive heat dissipation system can be provided, and the present application does not limit this.

[0067] As can be seen, the design of the battery system 1 of the present application effectively reduces the possibility of performance degradation or failure of the fuel cell 12 caused by high temperature, thereby effectively prolonging the service life of the battery system 1, reducing maintenance requirements and maintenance costs, and significantly improving its adaptability, stability and safety in complex working environments.

[0068] It should be noted that in the embodiments described in the present application, the heat dissipation member 133 not only includes an active heat exchange and heat dissipation system, but also includes a passive heat dissipation system. Specifically, the sealed tank body 11 is made of an aluminum alloy material, and a black anodized layer is arranged on the inner wall of the sealed tank body 11, thereby further improving the convection and radiation heat dissipation efficiency and the heat dissipation capacity of the battery system 1. Therefore, in alternative embodiments, the heat dissipation member 133 can be designed to include both an active heat dissipation system and a passive heat dissipation system. Of course, according to actual needs, only an active heat dissipation system or only a passive heat dissipation system can be provided, and the present application does not limit this. Figure 5 In the shown embodiment, in addition to the inlet and outlet of the heat dissipation member 133 and the exhaust port 16, the battery system 1 is also provided with a fuel port 122. From the above description, it can be seen that the fuel port 122 is arranged on the sealed tank body 11 and is connected to the fuel distribution device 121. Figure 2 As can be seen from the above description, the battery system 1 of the present application not only includes the heat dissipation member 133, but also includes the fuel distribution device 121. Figure 3 As can be seen from the above description, the battery system 1 of the present application not only includes the heat dissipation member 133, but also includes the fuel distribution device 121.

[0069] The design of the fuel distribution device 121 in the present application can achieve efficient distribution of fuel, improve the stability of the battery system 1, reduce the performance fluctuation of the battery caused by uneven fuel supply, thereby improving the fuel distribution efficiency, system stability and energy utilization rate of the battery system 1. Of course, in alternative embodiments, the fuel distribution device 121 can be designed to include only an active fuel distribution system or only a passive fuel distribution system, and the present application does not limit this. Figure 5In the embodiment shown, the fuel distributor 121 is designed in a four-way structure, i.e., four fuel tanks are provided for supplying a single fuel cell 12. In other alternative embodiments, the distributor can be designed in other specifications according to the performance requirements of the fuel cell 12 and the specific working conditions, and thus the present application is not limited in this regard.

[0070] In alternative embodiments, the battery system 1 further comprises a cover plate 17 and a sealing member 18, and the sealed box 11 further comprises a maintenance opening 113 communicating with the accommodating cavity 111. The cover plate 17 is arranged on the maintenance opening 113, and the sealing member 18 is arranged on the side of the cover plate 17 facing the maintenance opening 113.

[0071] The present application provides a more convenient operation channel for the maintenance and repair of the battery system 1 through the provision of the maintenance opening 113. At the same time, the design of the cover plate 17 and the sealing member 18 can effectively prevent the intrusion of dust, particulate matter, seawater, etc., thereby avoiding damage to the internal components of the battery system 1 and ensuring the sealing property of the sealed box 11 during daily work, thereby improving the safety, reliability and service life of the system.

[0072] As shown in Figure 6 and Figure 7 The present application also provides a thermal management control method applied to the battery system 1 as described above and executed by the control component 14, wherein the thermal management control method comprises:

[0073] S1, obtaining temperature information in the accommodating cavity 111 in response to a start signal of the fuel cell 12;

[0074] S2, determining whether the start environment temperature of the fuel cell 12 is lower than a minimum temperature threshold according to the temperature information;

[0075] S3, when the start environment temperature of the fuel cell 12 is lower than the minimum temperature threshold, controlling the thermal control component 13 to be turned on;

[0076] S4, determining whether the start environment temperature of the fuel cell 12 reaches a standard temperature threshold;

[0077] S5, when the start environment temperature of the fuel cell 12 reaches the standard temperature threshold, controlling the thermal control component 13 to be turned off and starting the fuel cell 12.

[0078] The design of the thermal management control method of the present application enables the battery system 1 to, upon receiving a start signal of the fuel cell 12, prioritize judging whether the start ambient temperature of the fuel cell 12 is too low according to the temperature information fed back by the temperature sensor, and control the thermal control assembly 13 to start working to heat the closed box body 11 to adjust the start ambient temperature of the fuel cell 12. After the start ambient temperature reaches the standard temperature threshold, the thermal control assembly 13 is controlled to be closed, and the fuel cell 12 is started, so as to ensure that the fuel cell 12 is always within a preferable working temperature range, thereby improving the output efficiency and service life of the fuel cell 12, and also ensuring the safety and stability of the fuel cell 12, and improving the intelligent level of the battery system 1.

[0079] In an optional embodiment, the control of the thermal control assembly 13 to start working includes:

[0080] S6, control the first heating element 131 to start working.

[0081] The thermal management control method of the present application can more uniformly heat the surrounding environment of the fuel cell 12 in the closed box body 11 by prioritizing starting the plurality of first heating elements 131 arranged around the fuel cell 12, thereby avoiding the problem of local overheating or overcooling of the fuel cell 12. The design of such a thermal management control method enables the battery system 1 to start faster in an extremely low temperature environment, has stronger adaptability, and can be stably operated for a long time without manual operation, thereby meeting the power demand of the field terminal, and improving the practicality and stability.

[0082] In an optional embodiment, the thermal management control method further includes:

[0083] S7, in response to a start signal of the fuel cell 12, control the air inlet 15 to start working;

[0084] S8, in response to a stop signal of the fuel cell 12, control the air inlet 15 to stop working.

[0085] The thermal management control method can ensure that the fuel cell 12 obtains sufficient oxygen supply during working, thereby improving the working efficiency of the fuel cell 12. Meanwhile, when the fuel cell 12 is in a non-working state, the air inlet 15 is controlled to be closed, so as to effectively prevent harmful substances such as external moisture and salt mist from entering the accommodation cavity 111, thereby protecting the fuel cell 12 and other internal components in the accommodation cavity 111, and significantly improving the environmental adaptability, safety and stability of the battery system 1.

[0086] In an optional embodiment, after the air inlet 15 is controlled to start working, the method further includes:

[0087] S9, detect the ambient temperature and running state of the air inlet 15;

[0088] S10, when the ambient temperature of the air inlet 15 is lower than the minimum temperature threshold and the running state is abnormal, the second heating element 132 is turned on.

[0089] Since part of the structure of the air inlet 15 is exposed outside the accommodating cavity 111 when the battery system 1 works in a relatively cold environment, icing and snow accumulation may occur, resulting in the air inlet 15 being unable to normally open or close. Therefore, when it is detected that the ambient temperature of the air inlet 15 is lower than the minimum temperature threshold and the running state of the air inlet 15 is abnormal, the thermal management control method of the present application can control the second heating element 132 to be turned on and heat the air inlet 15, thereby melting the ice and snow and ensuring the normal work of the air inlet 15. It can be seen that the design of the thermal management control method of the present application enables the battery system 1 to have preheating capability, thereby ensuring that it can still maintain normal and efficient working efficiency in an extremely low-temperature environment, significantly improving the adaptability of the battery system 1, and also ensuring that the battery system 1 can be stably operated for a long time in an unattended manner, meeting the power demand of a field terminal, and thereby improving the practicality and stability.

[0090] In an optional embodiment, the thermal management control method further comprises:

[0091] S11, in response to a start signal of the fuel cell 12, obtaining pressure information inside the fuel cell 12 and the ambient temperature of the exhaust port 16;

[0092] S12, determining whether the pressure inside the fuel cell 12 is greater than a standard pressure threshold and whether the ambient temperature of the exhaust port 16 is lower than a minimum temperature threshold according to the pressure information;

[0093] S13, when the pressure inside the fuel cell 12 is greater than the standard pressure threshold and the ambient temperature of the exhaust port 16 is lower than the minimum temperature threshold, the second heating element 132 is turned on.

[0094] Similarly, since part of the structure of the exhaust port 16 is exposed outside the accommodating cavity 111, when the battery system 1 works in a relatively cold environment, the exhaust port 16 may be blocked due to icing or snow accumulation, resulting in its inability to normally work. The thermal management control method of the present application determines whether the exhaust port 16 is blocked due to icing by detecting the pressure information of the fuel cell 12 and the ambient temperature of the exhaust port 16, and heats the exhaust port 16 by the second heating element 132 to avoid the blockage of the exhaust port 16. It can be seen that the design of the thermal management control method of the present application not only enables the accommodating cavity 111 to be heated to ensure that the start environment temperature of the fuel cell 12 is suitable, but also enables the air inlet 15 and the exhaust port 16 to be deiced and snow-melted, further improving the adaptability, practicality and stability of the battery system 1.

[0095] In an optional embodiment, the thermal management control method further comprises:

[0096] S14, in response to a start signal of the fuel cell 12, obtaining operation temperature information of the fuel cell 12;

[0097] S15, judging whether the operation temperature of the fuel cell 12 is higher than a maximum temperature threshold according to the operation temperature information;

[0098] S16, when the operation temperature of the fuel cell 12 is higher than the maximum temperature threshold, controlling the heat dissipation member 133 to be turned on.

[0099] In the thermal management control method of the present application, when it is detected that the operation temperature of the fuel cell 12 is higher than the maximum temperature threshold, the heat dissipation member 133 can be controlled to be turned on, i.e. the cooling medium in the medium storage tank 1333 is pumped into the heat exchanger 1331 through the pipeline shown by the blue line by the pump body 1332. Since the heat exchanger 1331 directly contacts the surface of the fuel cell 12, the heat generated in the working process of the fuel cell 12 can be quickly taken away, so as to ensure that the working temperature of the fuel cell 12 is kept in a stable range, avoiding the situation that the performance is degraded or the battery is damaged due to overheating. It can be seen that the design of the thermal management control method of the present application can quickly respond when the temperature of the fuel cell 12 rises, effectively reducing the possibility of performance degradation or failure of the fuel cell 12 caused by high temperature, thereby effectively prolonging the service life of the battery system 1, reducing the maintenance demand and maintenance cost, and significantly improving the adaptability, stability and safety in complex working environment.

[0100] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structure described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery system characterized by, The battery system comprises: a sealed box body comprising a containing cavity, an inner bottom of the sealed box body being concave downward to form a sunken chamber communicating with the containing cavity; a fuel cell installed in the containing cavity; a temperature sensor arranged in the containing cavity for detecting temperature information in the containing cavity; a thermal control assembly arranged in the containing cavity for adjusting an internal temperature of the sealed box body; an air inlet arranged on a side wall of the sunken chamber in an openable and closable manner; an air outlet arranged on a side wall of the containing cavity; the air inlet comprises a waterproof and air-permeable layer for waterproof sealing; when the fuel cell is in an operating state, external air enters the sealed box body through the waterproof and air-permeable layer; and a control assembly, the thermal control assembly and the temperature sensor being electrically connected to the control assembly respectively, the control assembly being used for receiving a temperature signal sent by the temperature sensor and controlling start and stop of the thermal control assembly according to the temperature signal; wherein the thermal control assembly comprises a heat dissipation member, a first heating member and a plurality of second heating members, the heat dissipation member comprising a medium storage box arranged outside the sealed box body and a heat exchanger and a pump body arranged in the sealed box body, the heat exchanger and the pump body being communicated through a pipeline, the heat exchanger being attached to a surface of the fuel cell, one end of the pump body being connected to the heat exchanger and the other end being communicated with the medium storage box; the first heating member being used for heating a space around the fuel cell; the plurality of second heating members being arranged in the sunken chamber and side walls of the containing cavity close to the air outlet respectively and being used for heating the air inlet and the air outlet respectively.

2. The battery system of claim 1, wherein, The number of the first heating members is plural and they are arranged around the fuel cell respectively.

3. The battery system of claim 1, wherein, When the fuel cell is in an operating state, the air inlet is opened to communicate the containing cavity with an external space for providing oxygen for the fuel cell; when the fuel cell is in a non-operating state, the air inlet is closed to separate the containing cavity from the external space to form a sealed containing cavity.

4. The battery system of claim 3, wherein, The air inlet is electrically connected to the control assembly, the control assembly controls opening and closing of the air inlet; when the control assembly controls opening of the air inlet, the waterproof and air-permeable layer is used for waterproof sealing.

5. The battery system of claim 1, wherein, One end of the air outlet is connected to the fuel cell and the other end is communicated with an external environment of the sealed box body for discharging fluid generated by the fuel cell.

6. The battery system of claim 1, wherein, The battery system further comprises a cover plate and a sealing member, the sealed box body further comprises a maintenance opening communicating with the containing cavity; the cover plate is arranged on the maintenance opening, and the sealing member is arranged on a side of the cover plate facing the maintenance opening.

7. A thermal management control method, characterized by, The thermal management control method is applied to the battery system of any one of claims 1-6 and is executed by the control assembly, wherein the thermal management control method comprises: in response to a start signal of the fuel cell, acquiring temperature information in the containing cavity; determining whether the start-up ambient temperature of the fuel cell is lower than a minimum temperature threshold according to the temperature information; controlling the thermal control assembly to be turned on when the start-up ambient temperature of the fuel cell is lower than the minimum temperature threshold; determining whether the start-up ambient temperature of the fuel cell reaches a standard temperature threshold; controlling the thermal control assembly to be turned off and starting the fuel cell when the start-up ambient temperature of the fuel cell reaches the standard temperature threshold.

8. The thermal management control method of claim 7, wherein, The thermal control assembly comprises a plurality of first heating elements, which are arranged on the side of the fuel cell. The control of the thermal control assembly to be turned on comprises: controlling the first heating elements to be turned on.

9. The thermal management control method of claim 7, wherein, The battery system further comprises an air inlet arranged on the side wall of the sealed box body, and the thermal management control method further comprises: controlling the air inlet to be turned on in response to a start-up signal of the fuel cell; controlling the air inlet to be turned off in response to a stop signal of the fuel cell.

10. The thermal management control method of claim 9, wherein, The thermal control assembly comprises a second heating element, and the control of the air inlet to be turned on further comprises: detecting the ambient temperature and the running state of the air inlet; turning on the second heating element when the ambient temperature of the air inlet is lower than the minimum temperature threshold and the running state is abnormal.

11. The thermal management control method of claim 7, wherein, The battery system further comprises an air outlet arranged on the side wall of the accommodating cavity, one end of the air outlet is connected to the fuel cell, and the other end is in communication with the outside of the sealed box body, the thermal control assembly comprises a second heating element, and the thermal management control method further comprises: obtaining the pressure information inside the fuel cell and the ambient temperature of the air outlet in response to a start-up signal of the fuel cell; determining whether the pressure inside the fuel cell is greater than a standard pressure threshold and the ambient temperature of the air outlet is lower than a minimum temperature threshold according to the pressure information; turning on the second heating element when the pressure inside the fuel cell is greater than the standard pressure threshold and the ambient temperature of the air outlet is lower than the minimum temperature threshold.

12. The thermal management control method of claim 7, wherein, The battery system further comprises a heat dissipation element arranged in the sealed box body, and the thermal management control method further comprises: obtaining the running temperature information of the fuel cell in response to a start-up signal of the fuel cell; determining whether the running temperature of the fuel cell is higher than a maximum temperature threshold according to the running temperature information; controlling the heat dissipation element to be turned on when the running temperature of the fuel cell is higher than the maximum temperature threshold.

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