Battery powered control method, system and transport refrigeration system for a transport vehicle

Abstract

The application relates to a battery-powered control method, a battery-powered control system and a transport refrigeration system for a transport device. The transport device is provided with a load and a battery for supplying power to the load. The battery-powered control method comprises the steps of: acquiring a battery allowable discharge ratio F cha , the battery allowable discharge ratio F cha being an upper limit value of a discharge ratio at which the battery can still be charged in a floating mode after being discharged; determining a maximum allowable discharge current I cha of the battery according to the acquired battery allowable discharge ratio F avb , a current available power C lef of the battery, a battery influencing factor F and a remaining working time T a of the battery; and determining and controlling a power supply current I a delivered by the battery to the load according to the determined maximum allowable discharge current I c of the battery and a target current I t required by the load. The application can effectively guarantee the safety and working performance of the battery, avoid problems such as deep discharge of the battery and damaged performance, and ensure that the battery discharge time meets the power demand of a load such as a TRU.

Description

Technical Field

[0001] This invention relates to the field of equipment power supply technology, and in particular to a battery power supply control method, a battery power supply control system, and a transportation refrigeration system for transportation equipment. Background Technology

[0002] exist Figure 1 The image shows the basic components and power supply layout of an existing transport refrigeration unit (TRU), which can be installed on transport equipment such as vehicles to provide functions such as refrigeration of goods during transportation. Figure 1 As shown, the transport refrigeration unit 10 may include a controller 4, a compressor 5, a condenser 6, an expansion device 7, and an evaporator 8, and can be powered by the power grid 9. However, if the power grid 9 is unavailable, the system can switch to battery operation mode, allowing the vehicle's battery 3 (e.g., 12V or 24V) to power the transport refrigeration unit 10. Furthermore, the generator 2 can convert the kinetic energy generated by the engine 1 into electrical energy to charge the battery 3.

[0003] Typically, the battery capacity is set based on the power requirements of loads such as transport refrigeration units, and an appropriate margin is often considered. Battery capacity is related to discharge current; a higher discharge current results in less usable battery capacity. If the battery operates at a high discharge current, the transport refrigeration unit's operating time will be difficult to achieve the expected target. Furthermore, when the battery voltage falls below a threshold (e.g., 10.5V), the battery will be deeply discharged, potentially damaging its performance and preventing it from being recharged via float charging using devices such as generators. This will affect the normal operation of loads such as transport refrigeration units. In addition, these situations can also shorten battery life and may pose potential safety risks. Summary of the Invention

[0004] In view of this, the present invention provides a battery power supply control method, a battery power supply control system, and a transportation refrigeration system for transportation equipment, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] First, according to a first aspect of the present invention, a battery power supply control method for a transport device is provided, the transport device being provided with a load and a battery for supplying power to the load, the battery power supply control method comprising the steps of:

[0006] Obtain the battery's permissible discharge ratio F. cha The battery allows a discharge rate F chaIt is the upper limit of the discharge ratio that a battery can still be charged in a float charging mode after it has been discharged;

[0007] Based on the obtained battery allowable discharge ratio F cha and the current available battery power C avb Battery impact factor F and remaining battery operating time T lef Determine the maximum allowable discharge current I of the battery. a ;as well as

[0008] Based on the determined maximum allowable discharge current I of the battery a The target current I required by the load c Determine and control the supply current I from the battery to the load. t .

[0009] In the battery power supply control method for transportation equipment according to the present invention, optionally, the actual charging time T of the battery is used as the basis for the control. cha And the battery type to obtain the battery's allowable discharge ratio F cha The steps include:

[0010] The battery charge-discharge characteristic curve of the battery is fitted to obtain the relationship F. cha =f(T cha );

[0011] Based on the usage requirements of the load, the actual battery charging time T is set. cha And based on the aforementioned relationship, the corresponding allowable battery discharge ratio F is calculated. cha ';

[0012] Based on the battery type, determine the corresponding maximum allowable discharge ratio F. cha_max The battery types include startup batteries, start-stop batteries, and deep discharge batteries; and

[0013] Select the battery's allowable discharge ratio F cha 'and the battery's maximum allowable discharge ratio F cha_max The smaller of the two is taken as the battery's allowable discharge ratio F. cha .

[0014] In the battery power supply control method for transportation equipment according to the present invention, optionally, the current available power C of the battery is... avb This is determined through the following steps:

[0015] Detect the actual voltage and actual current I of the battery. w And determine the corresponding actual usable battery capacity C based on the actual voltage. avb ';as well as

[0016] According to relation C avb = C avb '-I w *△T / 3600, calculate the current available battery capacity C. avb , where △T is the detection period, in seconds.

[0017] In the battery power supply control method for transportation equipment according to the present invention, optionally, the maximum permissible discharge current I of the battery is... a It is based on relation I a = C avb *F*F cha / T lef The remaining operating time T of the battery is determined through calculation. lef It is based on the relation T lef = T lef The value is determined by calculating '-△T / 3600, where T' is the value of '-△T / 3600'. lef 'T' is the remaining battery operating time T obtained during the last test. lef And with a preset battery operating time T bat The remaining battery operating time T at initialization lef .

[0018] In the battery power supply control method for transportation equipment according to the present invention, optionally, the battery influence factor F includes an ambient temperature influence factor F. amb Discharge current influence factor F cur At least one of them, and / or the value of △T is in the range of 0.1-999 seconds.

[0019] In the battery power supply control method for transportation equipment according to the present invention, optionally, the power supply current I t This is determined through the following steps:

[0020] The maximum allowable discharge current I of the battery a With the target current I c Perform size comparison;

[0021] If I a c Then select the maximum allowable discharge current I of the battery. a As the power supply current I t Otherwise, select the target current I. c As the power supply current I t .

[0022] ​In the battery power supply control method for a transport device according to the present invention, optionally, the load includes a transport refrigeration unit (TRU), and the battery is charged via the power grid or a generator on the transport device.

[0023] In the battery power supply control method for transportation equipment according to the present invention, optionally, the transportation equipment includes a vehicle, and the generator includes a diesel generator or an axle generator.

[0024] Secondly, according to a second aspect of the present invention, a battery power supply control system for a transport device is also provided, the transport device being provided with a load and a battery for supplying power to the load, the battery power supply control system including a controller configured to perform the following steps:

[0025] Obtain the battery's permissible discharge ratio F. cha The battery allows a discharge rate F cha It is the upper limit of the discharge ratio that a battery can still be charged in a float charging mode after it has been discharged;

[0026] Based on the obtained battery allowable discharge ratio F cha and the current available battery power C avb Battery impact factor F and remaining battery operating time T lef Determine the maximum allowable discharge current I of the battery. a ;

[0027] Based on the determined maximum allowable discharge current I of the battery a The target current I required by the load c Determine and control the supply current I from the battery to the load. t .

[0028] In the battery power supply control system for transportation equipment according to the present invention, optionally, the controller is configured to adjust the actual charging time T of the battery. cha And the battery type to obtain the battery's allowable discharge ratio F cha This includes performing the following steps:

[0029] The battery charge-discharge characteristic curve of the battery is fitted to obtain the relationship F. cha =f(T cha );

[0030] Based on the usage requirements of the load, the actual battery charging time T is set. cha And based on the aforementioned relationship, the corresponding allowable battery discharge ratio F is calculated. cha ';

[0031] Based on the battery type, determine the corresponding maximum allowable discharge ratio F. cha_max The battery types include startup batteries, start-stop batteries, and deep discharge batteries; and

[0032] Select the battery's allowable discharge ratio F cha 'and the battery's maximum allowable discharge ratio F cha_max The smaller of the two is taken as the battery's allowable discharge ratio F. cha .

[0033] In the battery power supply control system for transportation equipment according to the present invention, optionally, the controller is configured to perform the following steps to determine the current available power C of the battery. avb :

[0034] Detect the actual voltage and actual current I of the battery. w And determine the corresponding actual usable battery capacity C based on the actual voltage. avb ';as well as

[0035] According to relation C avb = C avb '-I w *△T / 3600, calculate the current available battery capacity C. avb , where △T is the detection period, in seconds.

[0036] In the battery-powered control system for a transportation device according to the present invention, optionally, the controller is configured according to relation I a = C avb *F*F cha / T lef Calculate the maximum allowable discharge current I of the battery. a And according to the relation T lef = T lef The remaining operating time T of the battery is calculated using '-△T / 3600'. lef T lef 'T' is the remaining battery operating time T obtained during the last test. lef And with a preset battery operating time T bat The remaining battery operating time T at initialization lef .

[0037] In the battery power supply control system for transportation equipment according to the present invention, optionally, the battery influence factor F includes an ambient temperature influence factor F. amb Discharge current influence factor F cur At least one of them, and / or the value of △T is in the range of 0.1-999 seconds.

[0038] In the battery-powered control system for transportation equipment according to the present invention, optionally, the controller is configured to perform the following steps to determine the supply current I. t :

[0039] The maximum allowable discharge current I of the battery a With the target current I c Perform size comparison;

[0040] If I a c Then select the maximum allowable discharge current I of the battery. a As the power supply current I t Otherwise, select the target current I. c As the power supply current I t .

[0041] In the battery-powered control system for transport equipment according to the present invention, optionally, the load includes a transport refrigeration unit (TRU), and the battery is charged via the power grid or a generator on the transport equipment.

[0042] In the battery-powered control system for a transport device according to the present invention, the transport device may optionally include a vehicle, and the generator may include a diesel generator or an axle generator.

[0043] Furthermore, according to a third aspect of the present invention, a transport refrigeration system is further provided, comprising:

[0044] Transport refrigeration units (TRUs), installed on transport equipment, are used to provide refrigerated space for storing goods; and

[0045] A battery, connected to the transport refrigeration unit (TRU), and configured to supply a current I determined by the battery power supply control method for transport equipment described above. t Power is supplied to the transport refrigeration unit (TRU).

[0046] The principles, features, characteristics, and advantages of the various technical solutions according to the present invention will become clear from the following detailed description in conjunction with the accompanying drawings. Compared with the prior art, the solutions of the present invention can effectively ensure the safety, reliability, and performance of the battery, avoid problems such as deep discharge and performance degradation, and ensure that loads such as TRUs operate normally during transportation and achieve the expected working time. Applying the present invention will help improve battery life, fully meet the power requirements of the load, and reduce the overall cost of the system. Attached Figure Description

[0047] ​The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are intended to conceptually illustrate the structural construction described herein, and are not necessarily drawn to scale.

[0048] Figure 1 This is a schematic diagram of the basic components and power supply layout of an existing transport refrigeration unit.

[0049] Figure 2 This is a schematic flowchart of an embodiment of a battery power supply control method for transportation equipment according to the present invention.

[0050] Figure 3 Is Figure 2 The battery power supply control method embodiment shown is used to determine the allowable discharge ratio F of the battery. cha A flowchart.

[0051] Figure 4 Is Figure 2 The battery power supply control method embodiment shown is used to determine the remaining battery operating time T. lef A flowchart.

[0052] Figure 5 Is Figure 2 The battery power supply control method embodiment shown determines the power supply current I. t A flowchart. Detailed Implementation

[0053] First, it should be noted that the following will illustrate the composition, steps, working principle, features, and advantages of the battery-powered control method, battery-powered control system, and transportation refrigeration system for transportation equipment according to the present invention by way of example. However, it should be understood that all descriptions are given for illustrative purposes only and should not be construed as limiting the present invention in any way. For example, unless explicitly stated otherwise, the sequence of operation steps described herein is only one of many possible sequences of operation steps. The corresponding operations of the present invention can be performed in different sequences or methods, and one or more sub-steps included in an example step can be performed independently.

[0054] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle, thereby obtaining more other embodiments of the present invention that may not be directly mentioned herein. Additionally, for the sake of brevity, general matters already known to those skilled in the art, such as the charge-discharge characteristic curves of various batteries, will not be elaborated upon herein.

[0055] refer to Figure 2 The figure illustrates, by way of example, the processing flow of an embodiment of a battery-powered control method for a transportation device according to the present invention. It should be understood that the transportation device described herein may include, but is not limited to, vehicles, ships, aircraft, etc., and may be equipped with loads such as transportation refrigeration units. Batteries can be used to provide power to such loads, and the battery can be supplemented with power from the power grid (e.g., the mains grid) or a generator on the transportation device (e.g., a diesel generator on a vehicle, axle generator, etc.). The following will illustrate... Figure 2 For example, the technical solution of the present invention will be introduced in general first.

[0056] like Figure 2 As shown, in this embodiment of the battery power supply control method, it may include the following steps:

[0057] In step S11, the battery's allowable discharge ratio F can be obtained first. cha For the battery's permissible discharge rate F cha This refers to the upper limit of the discharge ratio that a battery used to power loads on transportation equipment (such as TRUs) can still be recharged in a float charging mode after being discharged. In practical applications, the above-mentioned allowable battery discharge ratio F can be obtained through many feasible methods. cha For example, information can be obtained from battery manufacturers, suppliers, and research institutions, or it can be determined according to specific needs in different application scenarios, and then combined with... Figure 3 Examples are provided to further illustrate this point.

[0058] Next, in step S12, the battery allowable discharge ratio F obtained above can be... cha Combined with other parameters, the maximum allowable discharge current I of the battery is determined. a Such parameters may include, but are not limited to, for example, the current available battery capacity C. avb Battery influencing factors F (such as ambient temperature influencing factor, discharge current influencing factor, battery aging factor, etc., these battery influencing factors can be used individually or in combination), and remaining battery operating time T. lef In step S12 above, the maximum allowable discharge current I of the battery is determined by comprehensively considering these battery-related parameters. a It can objectively reflect the battery's discharge capacity and will be used to optimize and determine the appropriate supply current I that the battery should provide to the load. t .

[0059] Then, in step S13, based on the maximum allowable discharge current I of the battery obtained above... aThe target current I required by the load c (That is, the current value determined based on the power demand of the load) can be used to determine the appropriate supply current I that can be delivered from the battery to the load. t This allows the battery to be controlled to supply the current I. t By delivering electrical energy to the load, it eliminates concerns about insufficient battery discharge time causing loads such as TRUs to fail to achieve their expected operating time during transportation. On the other hand, it effectively avoids undesirable phenomena such as the inability to charge the battery in float mode, performance degradation, and reduced lifespan, thereby significantly improving battery management.

[0060] Based on the battery's maximum allowable discharge current I a The target current I required by the load c To obtain the supply current I t The specific processing method is open to numerous methods, as permitted by this invention. For example, in some implementations, the maximum permissible discharge current I of the battery can be... a and the target current I required by the load c The two are compared to determine the supply current I. t Subsequently, through Figure 5 Examples will be provided for specific illustration. For instance, in some other implementations, any possible numerical processing method (such as summing and averaging, weighted processing, etc.) can be used to process the maximum allowable discharge current I of the battery. a and the target current I required by the load c This is how the supply current I is obtained. t .

[0061] Please continue to refer to this. Figure 3 As an example, the figure shows a value that can be used to obtain the battery's permissible discharge ratio F. cha A feasible example is based on the actual charging time T of the battery. cha This is achieved through the type of battery.

[0062] Specifically, in step S21, the battery charge-discharge characteristic curve can be fitted to obtain the battery's allowable discharge ratio F. cha Compared with the actual charging time T of the battery cha The relationship F cha =f(T cha As an example, in one implementation, the following relationship can be obtained for a certain type of battery: F cha =n*T cha – m, where the constants n and m are values ​​obtained after fitting, for example, n=0.1056, m=0.0623 in one example.

[0063] Then, in step S22, the actual battery charging time T can be set according to the usage requirements of the load. cha And based on the above-derived relationship, the corresponding allowable battery discharge ratio F is calculated. cha '.

[0064] Next, in step S23, the maximum allowable discharge ratio F corresponding to the specific battery type can be determined. cha_max For example, batteries installed in vehicles can be categorized into starting batteries, start-stop batteries, and deep discharge batteries. The maximum permissible discharge ratio F for each of these three types of batteries can then be determined. cha_max Optionally, these values ​​can be set to 0.5, 0.7, and 0.8, or other suitable values. The specific battery type and corresponding maximum allowable discharge ratio F are also relevant. cha_max These values ​​can be obtained from battery manufacturers, suppliers, research institutions, etc., or they can be flexibly set according to different application scenarios, such as setting specific values ​​according to the user's actual requirements.

[0065] Subsequently, in step S24, the battery's allowable discharge ratio F can be... cha 'and the battery's maximum allowable discharge ratio F cha_max The two values ​​are compared; if the former is greater than the latter, then F is selected. cha_max As the battery's allowable discharge ratio F cha Otherwise, choose F. cha 'As the battery's allowable discharge ratio F cha It should be understood that in some applications, any possible numerical processing method (such as summing and averaging, weighted processing, etc.) can be used to calculate the allowable discharge ratio F of the battery. cha 'and the battery's maximum allowable discharge ratio F cha_max The process is performed to determine the battery's permissible discharge rate F. cha .

[0066] For example, as an alternative, in Figure 4 The example provided illustrates a method for determining the current available battery capacity C through calculation. avb Maximum allowable discharge current I of the battery a and remaining battery operating time T lef Examples. Figure 4 As shown, this example may include the following steps:

[0067] In step S31, the preset battery operating time T can be set. bat(For example, it can be set according to customer requirements, market application needs, etc.) as the remaining battery operating time T at initialization. lef .

[0068] In step S32, the actual voltage of the battery can be detected, and then the corresponding actual usable battery capacity C can be determined based on the detected actual voltage. avb '.

[0069] In step S33, the actual current of the battery and the ambient temperature T at the location of the battery can be detected. amb The actual current I detected w The current available battery capacity C will be calculated in step S34 according to the following formula. avb :

[0070] C avb = C avb '-I w *△T / 3600

[0071] In the above formula, △T is the detection period, and its unit is seconds. In practical applications, it can be set to any suitable value as needed. For example, the value range of △T can be optionally set to 0.1-999 seconds, such as 5 seconds, 10 seconds, 60 seconds, 300 seconds, 600 seconds, etc.

[0072] Furthermore, the environmental temperature influence factor F can be calculated in steps S35 and S36 respectively. amb Discharge current influence factor F cur Regarding the influence factor F of ambient temperature. amb The ambient temperature T detected in step S33 can be used. amb The calculation is performed. Existing technologies have already provided many such calculation methods. For example, in one implementation, the environmental temperature influence factor F of a certain type of battery can be calculated according to the following formula. amb :

[0073] F amb =a*T cha + b, where the constants a and b can be obtained from experimental test data, battery performance manuals, etc. For example, in one example a=0.0066, b=0.7975.

[0074] Similarly, for the discharge current influence factor F cur Existing technologies have already provided many computational processing methods. As an example, in one implementation, the discharge current influence factor F of a certain type of battery can be calculated according to the following formula. cur :

[0075] F cur =C rat / I w *c + d, where the constants c and d can be obtained from experimental test data, battery performance manuals, etc. For example, in one example c=0.1, d=0.46.

[0076] Then, in step S37, the maximum allowable discharge current I of the battery can be calculated according to the following formula. a :

[0077] I a = C avb *F amb *F cur *F cha / T lef

[0078] Furthermore, in step S38, the remaining battery operating time T can be calculated according to the following formula. lef :

[0079] T lef = T lef '-△T / 3600

[0080] Then, the next detection and calculation can be performed according to the cycle △T, and the corresponding remaining battery working time T can be obtained by using the steps described above. lef Starting from the second test, the remaining battery operating time T obtained from the previous test can be used. lef As T in the above relationship lef This allows for dynamic, real-time calculation of the remaining battery operating time.

[0081] Continue to refer to Figure 5 It provides a method for determining the supply current I delivered to the load via the battery. t Here are some processing examples where the following steps can be taken:

[0082] In step S41, the power requirements of the load are first set, which can be set or adjusted according to the load conditions, customer needs, etc.

[0083] In step S42, based on the aforementioned power demand and load power consumption, the target load current I can be calculated. c .

[0084] In step S43, the maximum allowable discharge current I of the battery can be calculated. a This has been discussed exemplarily above. Then, the maximum permissible discharge current I of the battery can be set. a With target current Ic Perform a size comparison.

[0085] In step S44, if I is found after comparison a Less than I c Then we can select the maximum allowable discharge current I of the battery. a As the supply current I t Otherwise, the target current I can be selected. c As the supply current I t Then, the supply current I can be... t As a target factor, controlling the battery's energy delivery to the load, due to the supply current I... t It is an optimized and selected suitable power supply current, thus effectively avoiding problems existing in the prior art, such as the battery being unable to be charged in float mode, performance damage, reduced lifespan, and failure to meet load operating time standards.

[0086] The above steps S41 to S44 can be continuously executed in a cycle of ΔT, thereby enabling real-time dynamic adjustment of the battery output current. This not only helps the battery maintain good working performance, but also fully guarantees the load's sufficient power demand.

[0087] As a significant advantage over the prior art, the present invention also provides a battery power supply control system for transportation equipment, which can be equipped with loads such as TRUs and can supply power to the loads via batteries. The batteries themselves can be supplemented with power by a power grid such as the mains grid or by a generator on the transportation equipment, such as a diesel generator or an axle generator.

[0088] As an example, a battery-powered control system may include a controller, which can be implemented using hardware such as a microcontroller or chip, software, or a combination of hardware and software, and can be configured to perform the following steps:

[0089] Obtain the battery's permissible discharge ratio F cha ;

[0090] Based on the obtained battery allowable discharge ratio F cha Current available battery power C avb Battery impact factor F and remaining battery operating time T lef Determine the maximum allowable discharge current I of the battery. a ;and

[0091] Based on the determined maximum allowable discharge current I of the battery a The target current I required by the load c Determine and control the supply current I from the battery to the load.t .

[0092] It should be understood that, without departing from the spirit of the invention, the present invention allows the controller in the battery-powered control system to be configured to perform more possible processing functions according to different application scenarios, such as performing the functions described above for... Figure 3 , Figure 4 and Figure 5 The various processing steps discussed.

[0093] For example, the controller can be configured to perform the following steps to determine the current available battery charge C. avb :

[0094] Detect the actual voltage and actual current I of the battery w And determine the corresponding actual usable battery capacity C based on the detected actual voltage. avb ';as well as

[0095] According to relation C avb = C avb '-I w *△T / 3600, calculate the current available battery capacity C. avb .

[0096] For example, the controller can be configured to operate based on relation I. a = C avb *F*F cha / T lef Calculate the maximum allowable discharge current I of the battery. a And according to the relation T lef = T lef The remaining battery operating time T is calculated using '-△T / 3600'. lef .

[0097] For example, the controller can be configured to perform the following steps to determine the supply current I. t :

[0098] The maximum allowable discharge current I of the battery a With target current I c Perform size comparison;

[0099] If I is determined a c Therefore, the maximum allowable discharge current I of the battery should be selected. a As the supply current I t Otherwise, select the target current I. c As the supply current I t .

[0100] ​It is understood that since the various steps in the battery power supply control method for transportation equipment according to the present invention have been discussed and described in detail above, it is not necessary to refer directly to the specific description in the corresponding part above, and it is not necessary to repeat the description in the battery power supply control system for transportation equipment according to the present invention.

[0101] According to another technical solution of the present invention, a transport refrigeration system is also provided, which may include a transport refrigeration unit (TRU) and a battery. The transport refrigeration unit (TRU) is installed on transport equipment such as vehicles, ships, and aircraft to provide refrigerated space for storing goods. The battery is connected to the transport refrigeration unit (TRU) and is configured to supply a power supply current I determined by the battery power supply control method according to the present invention. t Providing electrical energy to the transport refrigeration unit (TRU) provides the significant technical advantages of the present invention as described above. In practical applications, the batteries can be charged via the power grid or a generator on the transport equipment. Because of the present invention, issues such as undesirable deep discharge of the batteries, inability to charge the batteries in float mode via a generator, reduced battery life, and insufficient load power usage time are avoided.

[0102] The above examples illustrate, by way of illustration, the battery-powered control method for transportation equipment, the battery-powered control system, and the transportation refrigeration system according to the present invention. These examples are only for illustrating the principles and implementation methods of the present invention and are not intended to limit the invention. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should fall within the scope of the present invention and be defined by the claims of the present invention.

Claims

1. A battery power supply control method for a transport device, wherein the transport device is provided with a load and a battery for supplying power to the load, characterized in that, Including the following steps: Obtain the battery's permissible discharge ratio F. cha The battery allows a discharge rate F cha It is the upper limit of the discharge ratio that a battery can still be charged in a float charging mode after it has been discharged; Based on the obtained battery allowable discharge ratio F cha and the current available battery power C avb Battery impact factor F and remaining battery operating time T lef Determine the maximum allowable discharge current I of the battery. a ; as well as Based on the determined maximum allowable discharge current I of the battery a The target current I required by the load c Determine and control the supply current I from the battery to the load. t , Wherein, according to the actual charging time T of the battery cha And the battery type to obtain the battery's allowable discharge ratio F cha The steps include: The battery charge-discharge characteristic curve of the battery is fitted to obtain the relationship F. cha =f(T cha ); Based on the usage requirements of the load, the actual battery charging time T is set. cha And based on the aforementioned relationship, the corresponding allowable battery discharge ratio F is calculated. cha '; Based on the battery type, determine the corresponding maximum allowable discharge ratio F. cha_max The battery types include start-up batteries, start-stop batteries, and deep-discharge batteries; as well as Select the battery's allowable discharge ratio F cha 'and the battery's maximum allowable discharge ratio F cha_max The smaller of the two is taken as the battery's allowable discharge ratio F. cha .

2. The battery power supply control method for transportation equipment according to claim 1, wherein, The battery's current available power C avb This is determined through the following steps: Detect the actual voltage and actual current I of the battery. w And determine the corresponding actual usable battery capacity C based on the actual voltage. avb '; as well as According to relation C avb = C avb '-I w *△T / 3600, calculate the current available battery capacity C. avb , where △T is the detection period, in seconds.

3. The battery power supply control method for transportation equipment according to claim 2, wherein, The maximum permissible discharge current I of the battery a It is based on relation I a = C avb *F*F cha / T lef The remaining operating time T of the battery is determined through calculation. lef It is based on the relation T lef = T lef The value is determined by calculating '-△T / 3600, where T' is the value of '-△T / 3600'. lef 'T' is the remaining battery operating time T obtained during the last test. lef And with a preset battery operating time T bat The remaining battery operating time T at initialization lef .

4. The battery power supply control method for transportation equipment according to claim 2, wherein, The battery impact factor F includes the ambient temperature impact factor F. amb Discharge current influence factor F cur At least one of them, and / or the value of △T is in the range of 0.1-999 seconds.

5. The battery power supply control method for transportation equipment according to claim 1, wherein, The power supply current I t This is determined through the following steps: The maximum allowable discharge current I of the battery a With the target current I c Perform size comparison; If I a c Then select the maximum allowable discharge current I of the battery. a As the power supply current I t ;​ Otherwise, select the target current I. c As the power supply current I t .

6. The battery power supply control method for transportation equipment according to claim 1, wherein, The load includes a transport refrigeration unit (TRU), and the battery is charged via the power grid or a generator on the transport equipment.

7. The battery power supply control method for transportation equipment according to claim 6, wherein, The transport equipment includes vehicles, and the generator includes diesel generators or axle generators.

8. A battery-powered control system for a transport device, the transport device being provided with a load and a battery for supplying power to the load, wherein, The battery-powered control system includes a controller configured to perform the following steps: Obtain the battery's permissible discharge ratio F. cha The battery allows a discharge rate F cha It is the upper limit of the discharge ratio that a battery can still be charged in a float charging mode after it has been discharged; Based on the obtained battery allowable discharge ratio F cha and the current available battery power C avb Battery impact factor F and remaining battery operating time T lef Determine the maximum allowable discharge current I of the battery. a ; Based on the determined maximum allowable discharge current I of the battery a The target current I required by the load c Determine and control the supply current I from the battery to the load. t , The controller is configured to calculate the actual charging time T of the battery. cha And the battery type to obtain the battery's allowable discharge ratio F cha This includes performing the following steps: The battery charge-discharge characteristic curve of the battery is fitted to obtain the relationship F. cha =f(T cha ); Based on the usage requirements of the load, the actual battery charging time T is set. cha And based on the aforementioned relationship, the corresponding allowable battery discharge ratio F is calculated. cha '; Based on the battery type, determine the corresponding maximum allowable discharge ratio F. cha_max The battery types include start-up batteries, start-stop batteries, and deep-discharge batteries; as well as Select the battery's allowable discharge ratio F cha 'and the battery's maximum allowable discharge ratio F cha_max The smaller of the two is taken as the battery's allowable discharge ratio F. cha .

9. The battery-powered control system for transportation equipment according to claim 8, wherein, The controller is configured to perform the following steps to determine the current available battery power C. avb : Detect the actual voltage and actual current I of the battery. w And determine the corresponding actual usable battery capacity C based on the actual voltage. avb '; as well as According to relation C avb = C avb '-I w *△T / 3600, calculate the current available battery capacity C. avb , where △T is the detection period, in seconds.

10. The battery-powered control system for transportation equipment according to claim 9, wherein, The controller is configured according to relation I a = C avb *F*F cha / T lef Calculate the maximum allowable discharge current I of the battery. a And according to the relation T lef = T lef The remaining operating time T of the battery is calculated using '-△T / 3600'. lef T lef 'T' is the remaining battery operating time T obtained during the last test. lef And with a preset battery operating time T bat The remaining battery operating time T at initialization lef .

11. The battery-powered control system for transportation equipment according to claim 10, wherein, The battery impact factor F includes the ambient temperature impact factor F. amb Discharge current influence factor F cur At least one of them, and / or the value of △T is in the range of 0.1-999 seconds.

12. The battery-powered control system for transportation equipment according to claim 8, wherein, The controller is configured to perform the following steps to determine the supply current I. t : The maximum allowable discharge current I of the battery a With the target current I c Perform size comparison; If I a c Then select the maximum allowable discharge current I of the battery. a As the power supply current I t ;​ Otherwise, select the target current I. c As the power supply current I t .

13. The battery-powered control system for transportation equipment according to claim 8, wherein, The load includes a transport refrigeration unit (TRU), and the battery is charged via the power grid or a generator on the transport equipment.

14. The battery-powered control system for transportation equipment according to claim 13, wherein, The transport equipment includes vehicles, and the generator includes diesel generators or axle generators.

15. A transport refrigeration system, characterized in that, include: Transport refrigeration unit (TRU), which is installed on transport equipment to provide refrigerated space for storing goods; as well as A battery, connected to the transport refrigeration unit (TRU), and configured to supply a current I determined by the battery power supply control method for transport equipment according to any one of claims 1-7. t Power is supplied to the transport refrigeration unit (TRU).

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