A double-layer battery replacement station and vehicle battery replacement method thereof

Abstract

The present invention relates to the field of vehicle battery replacement technology, and in particular, to a double-layer battery replacement station and a vehicle battery replacement method thereof. The battery replacement method includes obtaining the frequency of incoming vehicles and the duration of the interval between incoming vehicles based on the preset battery replacement position of the battery replacement vehicle at the double-layer battery replacement station; obtaining the actual state of charge of all battery boxes located on the first charging layer based on the frequency of incoming vehicles being less than the preset frequency and the duration of the interval between incoming vehicles being less than the preset interval duration; and controlling the battery replacement cart to replace the battery box with the battery replacement vehicle based on the battery box with the largest actual state of charge in the first charging layer. The double-layer battery replacement station is applied to the battery replacement method, and the double-layer battery replacement station includes a charging warehouse, a plurality of fixed charging seats, a plurality of mobile charging seats, a plurality of battery boxes and a battery replacement cart. The cavity in the charging warehouse is sequentially arranged with a first charging layer, a second charging layer and an avoidance layer from bottom to top. The present invention can solve the problem of low battery replacement efficiency of battery replacement stations during peak periods of battery replacement.

Description

Technical Field

[0001] The present invention relates to the field of vehicle charging technology, and in particular to a double-layer battery replacement station and a vehicle battery replacement method thereof. Background Art

[0002] When electric vehicles run out of power, in order to quickly and conveniently replenish energy, they often replace batteries directly at battery swap stations. The main advantage of traditional single-layer battery swap stations is that their structure is relatively simple and their operation and maintenance costs are low. This design makes the construction and maintenance of battery swap stations relatively easy and can quickly respond to market demand. At the same time, single-layer battery swap stations can provide instant battery replacement services for electric vehicles, greatly shortening charging time and improving user experience. During peak battery swapping periods, although the capacity and battery swapping speed of single-layer battery swap stations may be subject to certain restrictions, they can still meet the battery swapping needs of some car owners to a certain extent.

[0003] However, in reality, there are still some problems in the operation of battery swap stations. During the peak period of battery swapping, a large number of electric vehicles flocked to the battery swapping stations, resulting in a surge in demand for battery swapping. However, due to the limited battery storage capacity, traditional single-layer battery swapping stations cannot accommodate too many spare batteries, which can easily lead to long waiting times during periods of high battery swapping demand, affecting user experience. Secondly, the battery swapping efficiency of single-layer battery swapping stations is limited by the spatial layout and the performance of the battery swapping equipment, making it difficult to complete the battery replacement of a large number of electric vehicles in a short period of time. In addition, with the continuous increase in the number of electric vehicles, the difficulty of expanding the capacity of single-layer battery swapping stations has gradually increased, making it difficult to meet the development needs of the future market. Summary of the invention

[0004] In order to solve the problem of low battery replacement efficiency at a battery replacement station during peak battery replacement periods, in a first aspect, the present invention provides a vehicle battery replacement method, the vehicle battery replacement method comprising:

[0005] Step S10, based on the preset battery swapping position of the battery swapping vehicle at the battery swapping station, obtain the frequency of incoming vehicles and the duration of the interval between incoming vehicles; the frequency of incoming vehicles is the number of the battery swapping vehicles that arrive at the preset battery swapping position within a detection time period, and the detection time period ends at the moment when the current battery swapping vehicle arrives at the preset battery swapping position; the duration of the interval between the current battery swapping vehicle and the previous battery swapping vehicle arriving at the preset battery swapping position;

[0006] Step S20, wherein step S20 includes step S21 and step S22;

[0007] Step S21, based on the vehicle frequency being less than the preset frequency and the vehicle interval being less than the preset interval, obtaining the actual charge state of all battery boxes located at the first charging layer; the double-layer battery swap station includes a charging compartment, the charging compartment has a first charging layer and a second charging layer, and the first charging layer is located below the second charging layer;

[0008] Step S22: Based on the battery box with the largest actual state of charge in the first charging layer, control the battery swapping vehicle to replace the battery box onto the battery swapping vehicle.

[0009] In some embodiments, step S22 includes:

[0010] Step S221, based on the fact that the number of the battery boxes with the largest actual state of charge in the first charging layer is one, control the battery swapping vehicle to replace the battery box with the battery swapping vehicle;

[0011] Step S222, based on the fact that there are multiple battery boxes with the largest actual state of charge in the first charging layer, obtaining the battery replacement distances of the multiple battery boxes from the entrance and exit of the charging compartment; the entrance and exit are located above the second charging layer; the battery replacement distance is the distance from the battery box to the entrance and exit in the horizontal direction;

[0012] Step S223, based on the battery box with the longest battery replacement distance, control the battery replacement vehicle to replace the battery box to the battery replacement vehicle.

[0013] In some embodiments, the detection time period is determined using the following formula:

[0014] t = n × v;

[0015] Among them, t is the detection time period; n is the number of the battery boxes when the first charging layer is fully loaded; v is the average battery replacement speed of the battery boxes in the first charging layer.

[0016] The preset frequency is the number of the battery boxes when the first charging layer is fully loaded.

[0017] In some embodiments, step S31, based on the vehicle arrival frequency being greater than a preset frequency and the vehicle arrival interval being less than a preset interval, obtaining the actual charge state of the battery box of the second charging layer;

[0018] Step S32, based on the battery box in the second charging layer whose actual state of charge is greater than the preset state of charge, obtaining the battery replacement distance of the battery box; the battery replacement distance is the distance from the battery box to the entrance and exit in the horizontal direction;

[0019] Step S33, based on the battery box with the shortest battery replacement distance in the second charging layer, control the battery replacement cart to replace the battery box to the battery replacement vehicle.

[0020] In some embodiments, step S33 includes:

[0021] Step S331, based on the fact that the number of the battery boxes with the shortest battery swapping distance in the second charging layer is one, control the battery swapping vehicle to replace the battery box with the battery swapping vehicle;

[0022] Step S332, based on the fact that there are multiple battery boxes with the shortest battery exchange distance in the second charging layer, obtaining the actual charge states of the multiple battery boxes;

[0023] Step S333: Based on the battery box with the largest actual charge state, control the battery swapping cart to replace the battery box onto the battery swapping vehicle.

[0024] In some embodiments, the step S30 further includes:

[0025] Step S34, replacing the battery box of the second charging layer with the battery swapping vehicle based on the battery swapping vehicle, and accumulating the number of battery swapping times of the second charging layer;

[0026] Step S35, based on the fact that the number of battery replacements at the second charging layer is less than a preset number, repeat steps S31 to S34.

[0027] In some embodiments, the step S30 further includes:

[0028] Step S36, based on the number of battery replacements at the second charging layer reaching the preset number, obtaining the actual state of charge of the battery box at the first charging layer;

[0029] Step S37, based on the battery box in the first charging layer whose actual state of charge is greater than the preset state of charge, obtaining the battery replacement distance of the battery box;

[0030] Step S38, based on the battery box with the shortest battery replacement distance in the first charging layer, control the battery replacement cart to replace the battery box to the battery replacement vehicle.

[0031] In some embodiments, step S41, based on the vehicle arrival frequency being greater than a preset frequency and the vehicle arrival interval being greater than a preset interval, obtaining the charge state of the battery box in the charging compartment;

[0032] Step S42, based on the battery box with the largest charge state, control the battery swapping cart to replace the battery box onto the battery swapping vehicle.

[0033] In a second aspect, the present invention provides a double-layer battery swap station, which is applied to any of the vehicle battery swap methods in the first aspect, and the double-layer battery swap station includes:

[0034] A charging compartment, wherein the cavity in the charging compartment is sequentially arranged with a first charging layer, a second charging layer and an avoidance layer from bottom to top, and an entrance and exit are opened on the charging compartment, and the entrance and exit are located in the avoidance layer;

[0035] A plurality of fixed charging seats, which are arranged in sequence on the first charging layer along a horizontal direction, and the fixed charging seats are detachably connected to the charging compartment;

[0036] A plurality of mobile charging seats, wherein the plurality of mobile charging seats are sequentially arranged in the second charging layer along a horizontal direction, the mobile charging seats are slidably connected to the charging compartment along a horizontal direction, and the arrangement direction of the mobile charging seats is parallel to the arrangement direction of the fixed charging seats;

[0037] A plurality of battery boxes, wherein the plurality of battery boxes are distributed on the plurality of fixed charging seats and the plurality of mobile charging seats, and at least one of the fixed charging seats or at least one of the mobile charging seats is in an unloaded state before each battery replacement;

[0038] A battery swap cart, which includes a mobile cart and a hoist. The mobile cart is slidably connected to the charging bin. The sliding directions of the mobile cart are two horizontal directions that are perpendicular to each other. The hoist is vertically slidably connected to the mobile cart.

[0039] In some embodiments, the number of the fixed charging seats is greater than the number of the mobile charging seats, and the moving direction of the mobile charging seats is parallel to the arrangement direction of the mobile charging seats.

[0040] In order to solve the problem of low power exchange efficiency at power exchange stations during the peak period of power exchange, the present invention has the following advantages:

[0041] When conventional battery swap stations provide battery swap services, they encounter low battery swap efficiency during peak traffic periods, which can easily cause traffic jams. The present invention proposes a double-layer battery swap station solution. The problem caused by the double-layer battery swap station is that the lifting stroke of the battery box on the lowest layer is too large, and the lifting speed needs to be reduced for safety reasons. Therefore, on the basis of the double-layer battery swap station, the present invention predicts the traffic flow in the next period of time according to the frequency of incoming vehicles and the current vehicle entry interval, thereby adjusting the grabbing strategy to minimize the adverse effects on traffic jams. If it is detected that the frequency of incoming vehicles is low and the interval between incoming vehicles is short, it is predicted that a peak period may occur next, so the battery boxes on the first charging layer are grabbed first, and then the battery boxes with a higher state of charge are grabbed first. In this way, the battery boxes on the second charging layer that are at a higher position and closer to the entrance and exit can be reserved for the peak period that will come later, so as to shorten the battery swap time and reduce the congestion during peak periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram showing a flow chart of a vehicle battery replacement method at a double-layer battery replacement station according to an embodiment;

[0043] Figure 2 A schematic diagram of the structure of a double-layer battery swap station according to an embodiment is shown, wherein the outer shell of the charging compartment is omitted in order to show the fixed charging seat and the mobile charging seat;

[0044] Figure 3 A schematic diagram showing the positional relationship of a double-decker battery swap station and a vehicle after reaching a preset battery swap position in one embodiment is shown.

[0045] Figure numerals: 10 charging warehouse; 11 first charging layer; 12 second charging layer; 13 avoidance layer; 14 entrance and exit; 20 fixed charging seat; 30 mobile charging seat; 40 battery box; 50 battery exchange trolley; 51 mobile trolley; 52 lifting device. DETAILED DESCRIPTION

[0046] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0047] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0048] During the peak period of battery replacement at battery replacement stations, traffic congestion problems often occur due to high power consumption pressure and slow battery replacement speed. Even if a double-layer battery replacement station that can accommodate more battery boxes 40 is used, the congestion problem cannot be effectively alleviated, because the double-layer battery boxes 40 have differences in physical position. When replacing batteries, the battery replacement robot needs to travel back and forth between the two layers. When the battery boxes 40 are lifted or lowered, the lifting speed needs to be reduced for safety reasons, which greatly increases the time required for battery replacement. Therefore, a more reasonable battery replacement method is needed to adapt to double-layer battery replacement stations, speed up the battery replacement speed in many ways, and reduce congestion during peak periods of battery replacement. To solve this problem, the present embodiment discloses a vehicle battery replacement method, such as Figure 1 As shown, it may include step S10 to step S20, and each step is described in detail as follows:

[0049] Step S10, the preset battery swapping position of the battery swapping vehicle in the battery swapping station is pre-set, and monitoring or sensors can be used to sense whether there is an incoming vehicle at the battery swapping position, so that the frequency of incoming vehicles and the length of the interval between incoming vehicles can be obtained. The frequency of incoming vehicles can be the number of battery swapping vehicles that arrive at the preset battery swapping position within the detection time period, and the detection time period ends at the moment when the current battery swapping vehicle arrives at the preset battery swapping position. The length of the interval between incoming vehicles can be the length of time between the current battery swapping vehicle and the previous battery swapping vehicle arriving at the preset battery swapping position.

[0050] Step S20, step S20 includes step S21 and step S22, each step is described in detail as follows:

[0051] Step S21, when the detected vehicle frequency is less than the preset vehicle frequency, and the vehicle interval is less than the preset vehicle interval, that is, the number of battery swapping vehicles has not increased significantly during the detection period, and the interval time between two battery swapping vehicles arriving at the battery swapping station is shortened, it can be predicted that the peak period of vehicle battery swapping is approaching, and the number of battery swapping vehicles will also increase during the detection period. Therefore, the actual state of charge of all battery boxes 40 located in the first charging layer 11 can be obtained to lock the battery box 40 with the most power in the first charging layer 11, such as a fully charged battery box 40. It should be understood that the state of charge refers to the ratio of the remaining power to the rated power. Figure 2 As shown, the double-layer battery swap station may include a charging compartment 10, and the charging compartment 10 may have a first charging layer 11 and a second charging layer 12. The first charging layer 11 is located below the second charging layer 12, so the first charging layer 11 is located at a lower position. Compared with horizontal movement of the battery box 40, hoisting the battery box 40 in the vertical direction requires work to overcome gravity and safety considerations, so the movement speed is slower and more time-consuming.

[0052] In step S22, based on the detected battery box 40 with the largest actual state of charge in the first charging layer 11, the battery swapping vehicle 50 can be controlled to replace the detected battery box 40 with the battery swapping vehicle. On the one hand, the battery box 40 with the largest power in the first layer is grabbed first, and the battery box 40 with insufficient power can continue to be charged. On the other hand, the battery box 40 in the second layer can be reserved for the vehicles in the subsequent peak period to achieve the purpose of reducing congestion.

[0053] In this embodiment, step S22 may include steps S221 to S223, each of which is described in detail as follows:

[0054] Step S221, when it is detected that there is only one battery box 40 with the largest actual state of charge in the first charging layer 11, the battery swapping vehicle 50 can be controlled to replace the battery box 40 with the battery swapping vehicle;

[0055] Step S222: When it is detected that there are multiple battery boxes 40 with the largest actual charge state in the first charging layer 11, the battery replacement distances of the multiple battery boxes 40 from the entrance 14 of the charging compartment 10 can be obtained. Figure 3 As shown, the port 14 may be located above the second charging layer 12 .

[0056] Step S223, based on the battery replacement distances of multiple battery boxes 40 with the largest actual charge states detected, the battery replacement cart 50 can be controlled to preferentially replace the battery box 40 with the longest battery replacement distance onto the battery replacement vehicle. The battery replacement distance is the horizontal distance from the battery box 40 to the entrance and exit 14. In the case where there are a large number of fully charged battery boxes 40 on the first charging layer 11, by preferentially grabbing the battery boxes 40 with a longer horizontal distance, as the frequency of incoming vehicles continues to increase, the battery boxes 40 with a shorter battery replacement distance will continue to be grabbed, so that the frequency of incoming vehicles matches the battery replacement distance of the battery box 40, so as to achieve a more uniform average battery replacement time for each battery replacement vehicle, and to avoid as much as possible the situation where the higher the frequency of incoming vehicles, the slower the battery replacement speed, thereby effectively reducing congestion.

[0057] In this embodiment, the detection time period can be determined by the following formula: t=n×v.

[0058] Among them, n is the number of battery boxes 40 when the first charging layer 11 is fully loaded, v is the average battery replacement speed of the battery boxes 40 of the first charging layer 11, and the detection time period t is the total battery replacement time when the first charging layer 11 is fully loaded.

[0059] The preset frequency may be the number of battery boxes 40 when the first charging layer 11 is fully loaded.

[0060] It should be understood that full load means that all charging seats in the charging compartment 10 that are capable of charging the battery box 40 have battery boxes 40 .

[0061] If the detection time period satisfies the above formula, it can be realized that when all the battery boxes 40 of the first charging layer 11 complete a round of battery replacement, it basically reaches the peak period of battery replacement, so that it can enter step S30 to grab the battery box 40 of the second charging layer 12. In this way, it is possible to smoothly switch the grabbing of the battery box 40 in the first charging layer 11 or the second charging layer 12, ensure the efficient battery replacement of the battery replacement station, and reduce congestion during the peak period of battery replacement.

[0062] It should be understood that the number of charging seats on the first charging layer 11 and the second charging layer 12 can be set according to the actual traffic conditions in the area where the charging station is located, so as to adapt to the congestion caused by the peak period of battery replacement in the current area to the greatest extent, so that during the dynamic changes in the frequency of incoming vehicles, the average battery replacement time for each battery replacement vehicle can always be maintained at a relatively constant level.

[0063] In this embodiment, the vehicle battery replacement method may include steps S31 to S33, each of which is described in detail as follows:

[0064] Step S31: When the frequency of incoming vehicles is greater than the preset frequency, and the interval between incoming vehicles is less than the preset interval, that is, the number of battery swapping vehicles in the detection time period has risen to a value exceeding the preset value, and the interval between the two nearest battery swapping vehicles arriving at the battery swapping station is shortened to a value within the preset value, it can be determined that the current peak period of battery swapping is in progress. During the peak period of battery swapping, the actual state of charge of the battery box 40 of the second charging layer 12 can be obtained;

[0065] Step S32, based on the actual state of charge of the battery box 40 in the second charging layer 12, the battery box 40 with an actual state of charge greater than the preset state of charge can be screened out, and then the battery replacement distance of the battery box 40 with an actual state of charge greater than the preset state of charge is obtained. For example, the preset state of charge can be 70%, 75%, 80%, etc. The battery box 40 that has not reached the preset state of charge can continue to charge on the charging seat so that the subsequent battery replacement vehicle can be replaced with a battery with more sufficient power.

[0066] Step S33, after obtaining the battery replacement distance of the battery box 40 whose actual state of charge is greater than the preset state of charge, the battery box 40 with the shortest battery replacement distance can be determined, and then the battery replacement cart 50 is controlled to replace the battery box 40 to the battery replacement vehicle, so as to achieve the fastest battery replacement speed that can be achieved by the battery replacement station, so as to shorten the battery replacement time of each vehicle during peak hours as much as possible and avoid congestion.

[0067] When the present invention predicts that the peak period of battery replacement is about to arrive, that is, in step S20, the battery box with the largest actual state of charge that is farther away is preferentially grabbed, that is, the fully charged battery box with a longer distance can be preferentially grabbed. On the one hand, sufficient charging time is provided for other battery boxes with lower actual states of charge, and on the other hand, battery boxes with shorter battery replacement times are reserved for subsequent battery replacement vehicles with a higher frequency of incoming vehicles, thereby reducing congestion. When it is judged that the peak period of battery replacement has been reached, that is, in step S30, the battery box with the largest actual state of charge is not judged first, but the battery box with a charge state greater than the preset state of charge is prioritized. In this way, the range of battery boxes that can be selected in the second charging layer can be expanded, so as to select battery boxes with a shorter battery replacement distance, so as to shorten the single battery replacement time during the peak period of battery replacement as much as possible and reduce congestion. Therefore, the present invention can adopt different grabbing strategies under different circumstances, so as to use double-layer battery replacement stations to reduce congestion problems caused by the peak period of battery replacement.

[0068] In this embodiment, step S33 may include steps S331 to S333, and each step is described in detail as follows:

[0069] Step S331, when it is detected that the number of battery boxes 40 with the shortest battery exchange distance in the second charging layer 12 is one, the battery exchange vehicle 50 can be controlled to replace the battery box 40 with the battery exchange vehicle;

[0070] Step S332, when it is detected that there are multiple battery boxes 40 with the shortest battery exchange distance in the second charging layer 12, the actual charge states of the multiple battery boxes 40 can be obtained;

[0071] Step S333, after obtaining the actual charge states of multiple battery boxes 40 with the shortest battery exchange distance in the second charging layer 12, the battery box 40 with the highest actual charge state can be determined by comparison, and then the battery exchange vehicle 50 can be controlled to replace the battery box 40 with the battery exchange vehicle. That is, during the peak period of battery exchange, if the charge state is greater than the preset charge state, the distance is compared first, and if there are multiple batteries with the closest distance, the actual charge state is compared again, and the battery box 40 with the closest distance and the highest actual charge state is selected for battery exchange.

[0072] In this embodiment, step S30 may further include steps S34 to S35, each of which is described in detail as follows:

[0073] Step S34, replacing the battery box 40 of the second charging layer 12 with the battery replacement vehicle based on the battery replacement vehicle 50, and accumulating the number of battery replacements of the second charging layer 12;

[0074] Step S35, based on the fact that the number of battery swaps in the second charging layer 12 is less than the preset number, steps S31 to S34 can be repeated. During the peak period of battery swaps, the battery boxes 40 in the second charging layer 12 are grabbed first until the number of battery swaps reaches the preset number, which means that all the battery boxes 40 in the second charging layer 12 that meet the condition that the actual state of charge is greater than the preset state of charge have been grabbed. At this time, you can switch to continue grabbing the battery boxes 40 in the first charging layer 11, and you don't have to be limited to the first charging layer 11 or the second charging layer 12.

[0075] The preset number of times may be greater than or equal to the number of battery boxes 40 when the second charging layer 12 is fully loaded.

[0076] During the first battery replacement process in the second charging layer 12, the time it takes for the empty battery box 40 in the charging compartment 10 to reach the preset state of charge is T. Whether all the battery boxes 40 in the second charging layer 12 can be replaced once within this T time period is related to the traffic volume, that is, the battery replacement interval between two adjacent vehicles, and the total number of battery boxes 40 in the second charging layer 12 when fully loaded. The less traffic volume, the longer it takes to replace all the battery boxes 40 in the second charging layer 12, so it is easier to exceed the time period T. The more the total number of battery boxes 40 in the second charging layer 12 when fully loaded, the longer it takes to replace all the battery boxes 40 in the second charging layer 12, so it is easier to exceed the time period T. Therefore, the full load number and the preset number of battery boxes 40 in the charging compartment 10 can be set accordingly according to the actual traffic volume in the area where the charging compartment 10 is located. For example, when the traffic volume is large and the number of fully loaded battery boxes 40 in the second charging layer 12 is small, the preset number of times can be set to be equal to the number of battery boxes 40 when the second charging layer 12 is fully loaded. In this way, when the number of battery replacements reaches the preset number, the grabbing mode can be switched to find a battery box 40 that meets the battery replacement conditions. When the traffic volume is small and the number of fully loaded battery boxes 40 in the second charging layer 12 is large, the preset number of times can be set to be greater than the number of battery boxes 40 when the second charging layer 12 is fully loaded. In this way, the battery boxes 40 in the second charging layer 12 can be grabbed multiple times within the preset number of times to make full use of the second charging layer 12 for battery replacement and reduce vehicle congestion.

[0077] In this embodiment, step S30 may further include steps S36 to S38, each of which is described in detail as follows:

[0078] Step S36, after the number of battery replacements in the second charging layer 12 reaches a preset number, the actual state of charge of the battery box 40 of the first charging layer 11 can be obtained and compared with the preset state of charge;

[0079] Step S37, after determining the battery boxes 40 in the first charging layer 11 whose actual state of charge is greater than the preset state of charge, the battery replacement distances of these battery boxes 40 can be obtained;

[0080] Step S38, after comparing the battery swap distances of the battery boxes 40 whose actual state of charge is greater than the preset state of charge in the first charging layer 11, the battery swapping vehicle 50 can be controlled to replace the battery box 40 with the smallest battery swapping distance to the battery swapping vehicle. Thus, during the peak period of battery swapping, after all the battery boxes 40 in the second charging layer 12 are used up, the battery boxes 40 in the first charging layer 11 can be grabbed, with priority given to the battery boxes 40 with a state of charge greater than the preset state of charge and the smallest battery swapping distance.

[0081] In this embodiment, the vehicle battery replacement method further includes step S40, which includes steps S41 to S42. Each step is described in detail as follows:

[0082] Step S41: When the frequency of incoming vehicles is still greater than the preset frequency, and the interval between incoming vehicles is greater than the preset interval, it can be determined that the peak period of battery replacement is coming to an end. At this time, the number of battery boxes 40 left in the charging point compartment is relatively small, and the charge status of all battery boxes 40 in the charging compartment 10 can be obtained and compared to determine the battery box 40 with the largest charge status;

[0083] Step S42, after determining the battery box 40 with the largest charge state, the battery swapping vehicle 50 can be controlled to replace the battery box 40 with the battery swapping vehicle. When the peak period of battery swapping is coming to an end, only the size of the charge state is determined, and the battery box 40 with the largest charge state is grabbed first, without considering the battery swapping position.

[0084] In this embodiment, a double-layer battery swap station is provided, and the double-layer battery swap station is applied to any vehicle battery swap method in the above embodiments, such as Figure 2 As shown, a double-decker battery swap station may include a charging compartment 10, multiple fixed charging seats 20, multiple mobile charging seats 30, multiple battery boxes and a battery swap cart 50.

[0085] The cavity in the charging compartment 10 may be arranged with a first charging layer 11, a second charging layer 12 and an escape layer 13 from bottom to top. An entrance 14 is provided on the charging compartment 10, and the entrance 14 may be located at the escape layer 13. The escape layer 13 may be used as a moving space for the battery box 40 to move horizontally when replacing the battery.

[0086] The design of two charging layers can accommodate more battery boxes 40 and reduce the space occupied by the battery swap station. However, the double-layer design will affect the battery swap efficiency due to the inconvenience of taking and placing the battery box 40. However, with the battery swap method in the present invention, the negative impact of the structure can be minimized, and a large number of battery boxes 40 can be charged at the same time, which can better deal with the congestion problem caused by the peak period of battery swap.

[0087] Multiple fixed charging seats 20 can be arranged in sequence in the horizontal direction on the first charging layer 11, and the fixed charging seats 20 can be detachably connected to the charging compartment 10. The fixed charging seat 20 can simplify the internal wiring arrangement of the battery box, but it also brings problems: only by moving the upper charging seat can the lower battery box 40 be grabbed, which brings inconvenience to battery replacement. And because the lifting device 52 on the battery replacement trolley 50 takes a long time to lift and lower, the battery replacement time of the lower battery box 40 is longer than that of the upper battery box 40.

[0088] A plurality of mobile charging seats 30 are arranged in sequence in the horizontal direction on the second charging layer 12. The mobile charging seats 30 are connected to the charging compartment 10 by sliding in the horizontal direction. The arrangement direction of the mobile charging seats 30 is parallel to the arrangement direction of the fixed charging seats 20, so that they can slide to make room for grabbing the lower battery box 40.

[0089] Multiple battery boxes 40 are distributed on multiple fixed charging seats 20 and multiple mobile charging seats 30. At least one fixed charging seat 20 or at least one mobile charging seat 30 is in an unloaded state before each battery replacement, so that the empty battery boxes 40 replaced from the battery replacement vehicle can be charged.

[0090] The battery exchange cart 50 may include a mobile cart 51 and a hoist 52. The mobile cart 51 is slidably connected to the charging compartment 10. The mobile cart 51 can slide in two horizontal directions perpendicular to each other, and the hoist 52 can be connected to the mobile cart 51 along a vertical sliding path. The mobile cart 51 and the hoist 52 move in coordination, and the hoist 52 can grab any battery box 40 on the first battery exchange layer and the second battery exchange layer. When exchanging batteries, the battery box 40 is first hoisted to the avoidance layer 13 using the battery exchange cart 50, and then the battery box 40 is moved horizontally so that the battery box 40 reaches the position of the entrance and exit 14.

[0091] In this embodiment, if Figure 2 As shown, the number of fixed charging seats 20 is greater than the number of mobile charging seats 30, and the moving direction of the mobile charging seats 30 is parallel to the arrangement direction of the mobile charging seats 30. The number of mobile charging seats 30 is small, and any fixed charging seat 20 can be slid so that the top is not blocked, which is convenient for the battery swapping trolley 50 to grab the battery box 40 of the first charging layer 11.

[0092] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A vehicle battery replacement method at a double-layer battery replacement station, characterized in that: The vehicle battery replacement method of the double-layer battery replacement station comprises: Step S10, based on the preset battery swapping position of the battery swapping vehicle at the double-decker battery swapping station, obtain the frequency of incoming vehicles and the duration of the interval between incoming vehicles; the frequency of incoming vehicles is the number of the battery swapping vehicles that arrive at the preset battery swapping position within a detection time period, and the detection time period ends at the moment when the current battery swapping vehicle arrives at the preset battery swapping position; the duration of the interval between incoming vehicles is the duration of the interval between the current battery swapping vehicle and the previous battery swapping vehicle arriving at the preset battery swapping position; Step S20, wherein step S20 includes step S21 and step S22; Step S21, based on the vehicle frequency being less than the preset frequency and the vehicle interval being less than the preset interval, obtaining the actual charge state of all battery boxes located at the first charging layer; the double-layer battery swap station includes a charging compartment, the charging compartment has a first charging layer and a second charging layer, and the first charging layer is located below the second charging layer; Step S22, based on the battery box with the largest actual state of charge in the first charging layer, controlling the battery swapping vehicle to replace the battery box with the battery swapping vehicle; The step S22 comprises: Step S221, based on the fact that the number of the battery boxes with the largest actual state of charge in the first charging layer is one, control the battery swapping vehicle to replace the battery box with the battery swapping vehicle; Step S222, based on the fact that there are multiple battery boxes with the largest actual state of charge in the first charging layer, obtaining the battery replacement distances of the multiple battery boxes from the entrance and exit of the charging compartment; the entrance and exit are located above the second charging layer; the battery replacement distance is the distance from the battery box to the entrance and exit in the horizontal direction; Step S223, based on the battery box with the longest battery replacement distance, control the battery replacement vehicle to replace the battery box to the battery replacement vehicle.

2. A vehicle battery replacement method at a double-layer battery replacement station according to claim 1, characterized in that: The detection time period is determined using the following formula: t=n*v; Wherein, t is the detection time period; n is the number of the battery boxes when the first charging layer is fully loaded; v is the average battery replacement speed of the battery boxes of the first charging layer; The preset frequency is the number of the battery boxes when the first charging layer is fully loaded.

3. A vehicle battery replacement method at a double-layer battery replacement station according to claim 1, characterized in that: The vehicle battery replacement method at the double-layer battery replacement station further includes step S30, and the step S30 includes: Step S31, based on the vehicle arrival frequency being greater than the preset frequency and the vehicle arrival interval being less than the preset interval, obtaining the actual charge state of the battery box of the second charging layer; Step S32, based on the battery box in the second charging layer whose actual state of charge is greater than the preset state of charge, obtaining the battery replacement distance of the battery box; the battery replacement distance is the distance from the battery box to the entrance and exit in the horizontal direction; Step S33, based on the battery box with the shortest battery exchange distance in the second charging layer, control the battery exchange cart to replace the battery box to the battery exchange vehicle.

4. A vehicle battery replacement method at a double-layer battery replacement station according to claim 3, characterized in that: The step S33 comprises: Step S331, based on the fact that the number of the battery boxes with the shortest battery swapping distance in the second charging layer is one, control the battery swapping vehicle to replace the battery box with the battery swapping vehicle; Step S332, based on the fact that there are multiple battery boxes with the shortest battery exchange distance in the second charging layer, obtaining the actual charge states of the multiple battery boxes; Step S333: Based on the battery box with the highest actual state of charge, control the battery swapping vehicle to replace the battery box onto the battery swapping vehicle.

5. A vehicle battery replacement method at a double-layer battery replacement station according to claim 3, characterized in that: The step S30 further includes: Step S34, replacing the battery box of the second charging layer with the battery swapping vehicle based on the battery swapping vehicle, and accumulating the number of battery swapping times of the second charging layer; Step S35, based on the fact that the number of battery replacements at the second charging layer is less than a preset number, repeat steps S31 to S34.

6. A vehicle battery replacement method at a double-layer battery replacement station according to claim 5, characterized in that: The step S30 further includes: Step S36, based on the number of battery replacements at the second charging layer reaching the preset number, obtaining the actual state of charge of the battery box at the first charging layer; Step S37, based on the battery box in the first charging layer whose actual state of charge is greater than the preset state of charge, obtaining the battery replacement distance of the battery box; Step S38, based on the battery box with the shortest battery replacement distance in the first charging layer, control the battery replacement cart to replace the battery box to the battery replacement vehicle.

7. A vehicle battery replacement method at a double-layer battery replacement station according to claim 3, characterized in that: The vehicle battery replacement method at the double-layer battery replacement station further includes step S40, and the step S40 includes: Step S41, based on the vehicle arrival frequency being greater than a preset frequency and the vehicle arrival interval being greater than a preset interval, obtaining the actual charge state of the battery box in the charging compartment; Step S42: Based on the battery box with the largest actual state of charge, control the battery swapping vehicle to replace the battery box onto the battery swapping vehicle.

8. A double-layer battery swap station, applied to a vehicle battery swap method of a double-layer battery swap station according to any one of claims 1 to 7, characterized in that: The double-layer battery swap station comprises: A charging compartment, wherein the cavity in the charging compartment is sequentially arranged with a first charging layer, a second charging layer and an avoidance layer from bottom to top, and an entrance and exit are opened on the charging compartment, and the entrance and exit are located in the avoidance layer; A plurality of fixed charging seats, which are arranged in sequence on the first charging layer along a horizontal direction, and the fixed charging seats are detachably connected to the charging compartment; A plurality of mobile charging seats, wherein the plurality of mobile charging seats are sequentially arranged in the second charging layer along a horizontal direction, the mobile charging seats are slidably connected to the charging compartment along a horizontal direction, and the arrangement direction of the mobile charging seats is parallel to the arrangement direction of the fixed charging seats; A plurality of battery boxes, wherein the plurality of battery boxes are distributed on a plurality of the fixed charging seats and a plurality of the mobile charging seats, and the sum of the number of the fixed charging seats and the mobile charging seats is greater than the number of the battery boxes in the charging compartment before battery replacement; A battery swap cart, which includes a mobile cart and a hoist. The mobile cart is slidably connected to the charging bin. The sliding directions of the mobile cart are two horizontal directions that are perpendicular to each other. The hoist is vertically slidably connected to the mobile cart.

9. A double-layer battery swap station according to claim 8, characterized in that: The number of the fixed charging seats is greater than the number of the mobile charging seats, and the moving direction of the mobile charging seats is parallel to the arrangement direction of the mobile charging seats.

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