Charging conversion system, battery system and water area movable equipment

Abstract

The charging conversion system provided by the embodiment of the invention comprises a charging main circuit and a control circuit of the charging main circuit. The charging main circuit comprises a charging pile charging module and a loadable charger charging module which are connected in parallel. The control circuit comprises a selection circuit, a charging pile control loop and a loadable charger control loop, wherein the charging pile control loop and the loadable charger control loop are electrically connected with the selection circuit. The selection circuit has a first mode and a second mode. The first mode is used for conducting the control loop of the loadable charger to control the charging module of the loadable charger to be conducted, and disconnecting the control loop of the charging pile to control the charging module of the charging pile to be disconnected. And the second mode is used for switching on the charging pile control loop to control the charging pile charging module to be switched on and switching off the loadable charging pile control loop to control the loadable charger charging module to be switched off. By adopting the system provided by the invention, the switching between the charging of the charging pile and the charging of the loadable charger is realized, the integration degree of the system is high, and the switching management of the charging modes is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of water area equipment, and particularly to a charging conversion system, a battery system, and a water area movable device. Background Art

[0002] At present, the battery system in a ship is charged by a DC charging pile or a portable on-board charger (OBC) is arranged on the ship to charge the battery using the OBC. Charging with a DC charging pile can meet high-power charging and fast charging time, but the ship operator needs to select a fixed place to install the DC charging pile, and the usage area is limited. When charging with an OBC, although the OBC can be flexibly installed and arranged, and can achieve battery charging anytime and anywhere, the charging power of the OBC is small and cannot meet the fast charging demand. In the scenario where the above two charging methods coexist, there is a lack of a solution to realize the convenient and safe switching between these two charging methods. Summary of the Invention

[0003] In view of the above problems mentioned in the background art, the present application provides a charging conversion system, a battery system, and a water area movable device to solve or at least partially solve the above problems.

[0004] In a first embodiment, the present application provides a charging conversion system. The system includes: a charging main circuit and a control circuit of the charging main circuit;

[0005] The charging main circuit includes a parallel-connected charging pile charging module and an on-board charger charging module;

[0006] The control circuit includes a selection circuit, a charging pile control loop electrically connected to the selection circuit, and an on-board charger control loop; wherein,

[0007] The selection circuit has a first mode and a second mode. The first mode is used to conduct the on-board charger control loop to control the on-board charger charging module to conduct, and disconnect the charging pile control loop to control the charging pile charging module to disconnect; the second mode is used to conduct the charging pile control loop to control the charging pile charging module to conduct, and disconnect the on-board charger control loop to control the on-board charger charging module to disconnect.

[0008] In a second embodiment, the present application provides a battery system. The battery system includes: a battery device and the charging conversion system provided in the first embodiment, wherein the battery device is electrically connected to the charging pile charging module and the on-board charger charging module in the charging conversion system.

[0009] Third Embodiment. The present application provides a waterborne movable device. The waterborne movable device includes the battery system provided in other embodiments of the present application.

[0010] For the technical solution provided in the embodiments of the present application, the charging conversion system includes a charging main circuit and a control circuit for the charging main circuit. The charging main circuit includes a charging pile charging module and a vehicle-mounted charger charging module connected in parallel. The control circuit includes a selection circuit, a charging pile control loop electrically connected to the selection circuit, and a vehicle-mounted charger control loop. The selection circuit has a first mode and a second mode. The first mode is used to turn on the vehicle-mounted charger control loop to control the vehicle-mounted charger charging module to turn on, and turn off the charging pile control loop to control the charging pile charging module to turn off. The second mode is used to turn on the charging pile control loop to control the charging pile charging module to turn on, and turn off the vehicle-mounted charger control loop to control the vehicle-mounted charger charging module to turn off. By using the system provided in the present application to achieve the switching between charging pile charging and vehicle-mounted charger charging, the system has a high degree of integration, which is convenient for the switching management of charging methods. In addition, due to the high degree of integration of the system, when the charging conversion system is arranged in the battery system, the assembly space of the battery system can be saved, and the space utilization rate of ships, etc. can be improved. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 Structural schematic diagram of the charging conversion system provided for an exemplary embodiment of the present application;

[0013] Figure 2a and Figure 2b Structural schematic diagram of the charging main circuit in the charging conversion system provided for an exemplary embodiment of the present application;

[0014] Figure 3a and Figure 3b Structural schematic diagram of the control circuit in the charging conversion system provided for an exemplary embodiment of the present application;

[0015] Figure 4 Structural schematic diagram of the charging conversion system provided for another exemplary embodiment of the present application. Detailed Embodiments

[0016] At present, with the rapid development of ship electrification, the replenishment of the battery system has become a necessity. The common way to replenish the battery system is to use a DC charging pile to charge the battery. However, this charging method requires the shipowner (the operator or owner of the ship) to choose a fixed location to install the DC charging pile, and the usage area is limited. Therefore, many ship manufacturers will arrange a portable on-board charger (OBC) on the ship to facilitate battery replenishment at any time and anywhere. However, the power of the OBC is small and the charging time is long, which cannot meet the demand for fast charging. It can be seen that the above two battery replenishment methods have their own advantages and disadvantages. In the scenario where the above two battery replenishment methods coexist, in order to improve the charging efficiency, a solution is needed to meet the requirements of compatibility and convenient and safe switching of the above two battery replenishment methods in the hardware circuit.

[0017] To solve the above problems, the present application provides a charging conversion system, a battery system and a waterborne mobile device. Among them, the waterborne mobile device includes a ship.

[0018] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0019] In some processes described in the specification, claims, and the above-mentioned drawings of this application, multiple operations that appear in a specific order are included. These operations can be executed not in the order in which they appear herein or can be executed in parallel. The serial numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. Additionally, these processes can include more or fewer operations, and these operations can be executed in sequence or in parallel. It should be noted that the descriptions such as "first", "second", etc. in this article are used to distinguish different messages, devices, modules, etc., do not represent a sequential order, and do not limit that "first" and "second" are different types. In this application, the term "or / and" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example: A or / and B means that A can exist alone, A and B can exist simultaneously, and B can exist alone; the character " / " in this application generally represents an "or" relationship between the front and back associated objects. It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a commodity or system. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the commodity or system including the said element. In addition, the following embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application.

[0020] Before introducing each embodiment, some technical terms that appear in this article will be briefly explained. It can be understood that this explanation is for a clearer understanding of the embodiments of this application and does not necessarily constitute a limitation to the embodiments of this application.

[0021] Relay: It is an electrical control device that controls the on - off of large current through small current, playing roles such as automatic regulation, safety protection, and circuit conversion. The basic principle of a relay is to achieve the switching function based on electromagnetic attraction or solid - state electronic components. The main components of a relay include a coil, an iron core, an armature, contacts, etc. When current passes through the coil, a magnetic field is generated. The iron core can enhance this magnetic field. The armature moves under the action of the magnetic field, thereby closing or opening the contacts. The contacts are divided into normally open contacts (NO), normally closed contacts (NC), and common contacts, which are used to connect or cut off the circuit. Also, the working principle of the relay is as follows: When a voltage is applied to the coil of the relay, the generated electromagnetic field attracts the armature, causing the armature to move, and then changing the state of the contacts; if the contacts of the relay were originally open (normally open contacts), then after the armature is attracted, the contacts will close, allowing current to flow through; on the contrary, if the contacts were originally closed (normally closed contacts), they will open after the armature moves, preventing current from flowing.

[0022] The technical solutions provided by each embodiment of the present application will be introduced and described below.

[0023] Figure 1 Fig. shows a schematic structural diagram of a charging conversion system provided by an exemplary embodiment of the present application. This charging conversion system can be applied to the battery system in water - movable devices. Specifically, in implementation, the water - movable device can be a ship, and the ship can be various water - traffic devices such as commercial ships, passenger ships, yachts, fishing boats, sailboats, civilian ships, etc. In addition, the water - movable device can also be a water - patrol device, a water - treatment device, a water - environment monitoring device, etc. The type of the water - movable device is not limited in this embodiment.

[0024] As shown in Figure 1 As shown, the charging conversion system includes: a charging main circuit 1 and a control circuit 2 of the charging main circuit. The charging main circuit 1 includes a parallel connection of a charging - pile charging module 11 (i.e., a DC charging - pile charging module) and a vehicle - on - board charger charging module 12 (i.e., an OBC charging module). The control circuit 2 includes a selection circuit 23, a charging - pile control loop 21 (i.e., a DC charging - pile control loop) electrically connected to the selection circuit 23, and a vehicle - on - board charger control loop 22 (i.e., an OBC control loop). Among them, the above - mentioned selection circuit 23 has a first mode and a second mode. The first mode is used to conduct the vehicle - on - board charger control loop 22 to control the conduction of the vehicle - on - board charger charging module 12, and disconnect the charging - pile control loop 21 to control the disconnection of the charging - pile charging module 11. The second mode is used to conduct the charging - pile control loop 21 to control the conduction of the charging - pile charging module 11, and disconnect the vehicle - on - board charger control loop 22 to control the disconnection of the vehicle - on - board charger charging module 12.

[0025] In some embodiments, the main charging circuit 1 may further include a DC charging output circuit 13 and a DC busbar 14. One end of the DC charging output circuit 13 is electrically connected to an external battery device, and the other end is electrically connected to the charging pile charging module 11 and the vehicle-mounted charger charging module 12 through the DC busbar 14. The battery device may be, but is not limited to, a lithium battery device. The DC busbar 14 can be used to carry and distribute direct current with a voltage of 116 volts (i.e., DC116V).

[0026] In a specific embodiment, as shown in Figure 2a and Figure 2b the above-mentioned vehicle-mounted charger charging module 12 includes a vehicle-mounted charger charging circuit 121 (i.e., the OBC charging circuit), an AC power supply circuit 122 (i.e., the OBC AC power supply circuit), and an AC-DC converter 123 (DC-AC). One end of the vehicle-mounted charger charging circuit 121 is electrically connected to the DC busbar, and the other end is electrically connected to the AC power supply circuit 122 through the AC-DC converter 123. The AC-DC converter 123 is used to convert the alternating current output by the AC power supply circuit 122 into direct current and deliver the direct current to the vehicle-mounted charger charging circuit 121.

[0027] Moreover, when the vehicle-mounted charger control circuit 22 is turned on, a part of the circuit in the AC power supply circuit 122 is turned on. When alternating current is input into the AC power supply circuit 122, the AC power supply circuit 122 is completely turned on, and pre-charging is achieved by first turning on a part of the circuit in the AC power supply circuit 122 to be powered on, so as to prevent current surges caused by direct input of alternating current. Among them, the alternating current input into the AC power supply circuit may be single-phase shore power. Specifically, as shown in Figure 2bAs shown, this AC power supply circuit 122 includes the normally open contact of the first relay KA1, the coil and normally open contact of the second relay KM1, and the AC busbar (the AC busbar can be used to carry and distribute AC power with a voltage of 230 volts (i.e., AC230V)). One end of the normally open contact of the above-mentioned first relay KA1 is electrically connected to one end of the coil of the second relay KM1, and the other end is electrically connected to the N end of the AC busbar (which is the neutral line). The other end of the coil of the second relay KM1 is electrically connected to the L end of the AC busbar (which is the live wire (Live), also known as the phase line (Line)). In addition, one point of the normally open contact of the second relay KM1 is electrically connected to the AC busbar, and the other end is electrically connected to the AC-DC converter 123. When the loadable charger control circuit 22 is turned on, specifically, the normally open contact of the first relay KA1 can be closed, thereby realizing the conduction of part of the circuit in the AC power supply circuit 122 (i.e., the circuit where the normally open contact of the first relay KA1 is located is turned on). Furthermore, when the normally open contact of the first relay KA1 is closed, when AC power is input into the AC power supply circuit 122, the coil of the second relay KM1 will be energized, and then the normally open contact of the second relay KM1 will be closed, and the AC power supply circuit 122 will be fully turned on.

[0028] The conduction of the above-mentioned loadable charger control circuit 22 is controlled by the selection circuit 23 in the first mode. Figure 3b As shown, the control circuit 2 also includes a power supply busbar, which can be used to carry and distribute low-voltage direct current (such as direct current with a voltage of 12 volts, that is, DC12V). In addition, the selection circuit 23 includes a three-position selection switch, specifically, the three-position selection switch includes a selection switch, a first contact (for Figure 3b OBC contacts shown in the figure) and the second contact (for Figure 3bThe pile contacts shown in [description]. One end of the above-mentioned selector switch is electrically connected to the negative terminal of the power supply busbar, and the other end can be switched to contact one of the first contact and the second contact. The first contact is electrically connected to one end of the vehicle-mounted charger control circuit 22, and the other end of the vehicle-mounted charger control circuit 22 is electrically connected to the power supply busbar. The second contact is electrically connected to one end of the charging pile control circuit 21, and the other end of the charging pile control circuit 21 is electrically connected to the power supply busbar. When the other end of the above-mentioned selector switch contacts the first contact, the selection circuit is in the first mode, and the selector switch connects the power supply busbar to the vehicle-mounted charger control circuit 22. When there is a low-voltage direct current input to the power supply busbar, the vehicle-mounted charger control circuit 22 can obtain the low-voltage direct current, and then the vehicle-mounted charger control circuit 22 can be turned on. When the other end of the selector switch contacts the second contact, the selection circuit is in the second mode, and the selector switch connects the power supply busbar to the charging pile control circuit 21. When there is a low-voltage direct current (such as DC12V) input to the power supply busbar, the charging pile control circuit 21 can be turned on.

[0029] As shown in Figure 3b As shown, the above-mentioned vehicle-mounted charger control circuit 22 may include a first control circuit 221 and a second control circuit 222. One end of the first control circuit 221 is electrically connected to the first contact, and the other end is electrically connected to the power supply busbar. When the first control circuit 221 is turned on, it will control the second control circuit 222 to turn on and also control the AC power supply circuit 122 to turn on. The second control circuit 222 is electrically connected to the power supply busbar. When the second control circuit is turned on, it will control the vehicle-mounted charger charging circuit 121 to turn on and also control the charging pile control circuit 21 to disconnect. When the charging pile control circuit 21 is disconnected, it controls the first control circuit 221 to turn on.

[0030] The first control circuit 221 has a first control switch 2211 and a first coil circuit 2212 electrically connected to the first control switch 2211. Specifically, one end of the first control switch 2211 is electrically connected to the first contact, the other end is electrically connected to one end of the first coil circuit 2212, and the other end of the first coil circuit 2212 is electrically connected to the positive pole of the power supply busbar. The second control circuit 222 has a second control switch 2221 and a second coil circuit 2222 electrically connected to the second control switch 2221. Specifically, one end of the second control switch 2221 is electrically connected to the negative pole of the power supply busbar, the other end is electrically connected to one end of the second coil circuit 2222, and the other end of the second coil circuit 2222 is electrically connected to the positive pole of the power supply busbar. When the first control switch 2211 is closed, the power supply busbar obtains low-voltage direct current from an external power source, and the first control circuit 221 is turned on, so that the first coil circuit 2212 is powered on. When the first coil circuit 2212 is powered on, it controls the conduction of the AC power supply loop 122 and the closing of the second control switch 2221. When the second control switch 2221 is closed, the second control circuit 222 is turned on, so that the second coil circuit 2222 is powered on. When the second coil circuit 2222 is powered on, it controls the conduction of the chargeable on-vehicle charger charging loop 121. When an alternating current is connected to the AC busbar, the chargeable on-vehicle charger charging loop 121 outputs direct current to the DC busbar 14.

[0031] During specific implementation, the first control switch 2211 is the normally closed contact of the third relay KT3, and the coil of the third relay KT3 is electrically connected to the charging pile control loop 21. The first coil circuit 2212 includes the coils of the first relay KA1 and the fourth relay KT1 connected in parallel. Also, the second control switch 2221 is the normally open contact of the fourth relay KT1. The second coil circuit 2222 includes the coils of the fifth relay KM3 and the sixth relay KT4 connected in parallel. The normally open contact of the fifth relay KM3 is electrically connected in the chargeable on-vehicle charger charging loop 121 (such as Figure 2bAs shown). The normally closed contact of the sixth relay KT4 is electrically connected to the charging pile control circuit 21, and one end of the normally closed contact of the sixth relay KT4 is electrically connected to the second contact. When the selection switch contacts the first contact (OBC contact), the normally closed contact of the third relay KT3 will remain normally closed due to the loss of power to the coil of the third relay KT3 in the charging pile control circuit 21. At this time, the first control circuit 221 is in the on state, and the coil of the first relay KA1 and the coil of the fourth relay KT1 in the first control circuit 221 are energized. When the coil of the first relay KA1 is energized, it will control the normally open contact of the first relay KA1 in the AC power supply circuit 122 to close (that is, to be attracted). In the normally open contact closed state of the first relay KA1, when AC power is input into the AC power supply circuit 122, the coil of the second relay KM1 in the AC power supply circuit 122 will be energized, and then the normally open contact of the second relay KM1 will be closed, and the AC power supply circuit 122 will be fully conductive. When the coil of the fourth relay KT1 is energized, the normally open contact of the fourth relay KT1 in the second control circuit 222 is closed, and then the second control circuit 222 is in the on state, and the coil of the fifth relay KM3 and the coil of the sixth relay KT4 in the second control circuit 222 are energized. When the coil of the fifth relay KM3 is energized, the normally open contact of the fifth relay KM3 in the charging circuit 121 of the loadable charger is controlled to be closed, so that the charging circuit 121 of the loadable charger is turned on. When the coil of the sixth relay KT4 is energized, the normally closed contact of the sixth relay KT4 in the charging pile control circuit 21 is controlled to be disconnected, so that the charging pile control circuit 21 is disconnected. When the charging pile control circuit 21 is disconnected, the coil of the third relay KT3 included in the charging pile control circuit 21 is in the de-energized state, thereby controlling the normally closed contact of the third relay KT3 in the first control circuit 221 to remain normally closed, so that the first control circuit 221 is turned on.

[0032] Continue to see Figure 3b The second control circuit 222 is also provided with a loadable charger charging indication device (i.e. Figure 3b The OBC charging indicator device shown in FIG. 1 ). One end of the loadable charger charging indicator device is electrically connected to the second coil circuit 2222, and the other end is electrically connected to the positive pole of the power supply busbar. The loadable charger charging indicator device can be, but is not limited to, at least one of the following: an indicator light, a voice prompt device, a prompt screen, etc. Figure 3b In the figure, the loadable charger charging indicator device exemplarily shown is an indicator light.

[0033] The circuit structures of the loadable charger charging module 12 and the loadable charger control circuit 22 are described in detail above. The charging pile charging module 11 and the charging pile control circuit 21 are described in detail below.

[0034] In a specific example, as shown in Figure 2a and Figure 2b , the charging module 11 of the charging pile includes a charging circuit 111 of the charging pile (a DC charging circuit of the charging pile) and an auxiliary power supply circuit 112 (an auxiliary power supply circuit for DC charging). The charging circuit 111 of the charging pile is electrically connected to the DC bus bar 14. The auxiliary power supply circuit 112 is used for the external charging pile to perform communication handshaking with the external battery device. Specifically, it is the charging pile that performs communication handshaking with the battery management module (BMS) in the battery device. After the communication handshaking is completed, the charging pile starts the charging operation and inputs direct current into the charging circuit 111 of the charging pile.

[0035] During specific implementation, a charging socket 113 (a DC charging socket) may further be included in the above-mentioned charging module 11 of the charging pile. This charging socket is used for the charging gun of the charging pile to be inserted. One end of the auxiliary power supply circuit 112 is electrically connected to the charging socket, and the other end is electrically connected to the external battery device. One end of the charging circuit 111 of the charging pile is electrically connected to the charging socket 113, and the other end is electrically connected to the DC bus bar 14. When the charging gun of the charging pile is inserted into the charging socket 113, a DC charging handshaking signal (i.e., a DC auxiliary power supply signal A+) will be generated, and this DC charging handshaking signal will be output to the battery device through the auxiliary power supply circuit 112, thereby realizing the communication handshaking between the charging gun and the battery device. When the communication handshaking is completed, the charging pile starts the charging operation and inputs direct current into the charging circuit 111 of the charging pile.

[0036] Moreover, when the above-mentioned charging pile control circuit 21 is turned on, it can control the auxiliary power supply circuit 112 to be turned on and the charging circuit 111 of the charging pile to be turned on. The turning on of the charging pile control circuit 21 is controlled by the selection circuit 23 being in the second mode. For the detailed implementation of the selection circuit 23 being in the second mode, reference can be made to the relevant content described in other embodiments, and specific details will not be elaborated here.

[0037] As shown in Figure 3b , in some examples, the charging pile control circuit 21 may include a third control circuit 211 and a fourth control circuit 212. One end of the third control circuit 211 is electrically connected to the second contact in the selection circuit, and the other end is electrically connected to the positive pole of the power supply bus bar. When the third control circuit 211 is turned on, it controls the auxiliary power supply circuit 112 to be turned on and the fourth control circuit 212 to be turned on. The fourth control circuit 212 is electrically connected to the power supply bus bar. Specifically, one end of the fourth control circuit 212 is electrically connected to the positive pole of the power supply bus bar, and the other end is electrically connected to the negative pole of the power supply bus bar. When the fourth control circuit 212 is turned on, it controls the charging circuit 111 of the charging pile to be turned on, and in addition, it can also control the load charging machine control circuit 22 to be turned off. When the load charging machine control circuit 22 is turned off, it will control the third control circuit 211 to be turned on.

[0038] The above-mentioned third control circuit 211 includes a third control switch 2111 and a third coil circuit 2112 electrically connected to the third control switch 2111. Specifically, one end of the third control switch 2111 is electrically connected to the second contact, and the other end is electrically connected to one end of the third coil circuit 2112; the other end of the third coil circuit 2112 is electrically connected to the positive pole of the power supply busbar. The above-mentioned fourth control circuit 212 includes a fourth control switch 2121 and a fourth coil circuit 2122 electrically connected to the fourth control switch 2121. Specifically, one end of the fourth control switch 2121 is electrically connected to the negative pole of the power supply busbar, and the other end is electrically connected to one end of the fourth coil circuit 2122; the other end of the fourth coil circuit 2122 is electrically connected to the positive pole of the power supply busbar. When the third control switch 2111 is closed, the third control circuit 211 is turned on, causing the third coil circuit 2112 to be powered on. When the third coil circuit is powered on, it controls the auxiliary power supply circuit 112 to be turned on and the fourth control switch 2121 to be closed. When the fourth control switch 2121 is closed, the fourth control circuit 212 is turned on, causing the fourth coil circuit 2122 to be powered on. When the fourth coil circuit 2122 is powered on, it controls the charging pile charging circuit 111 to be turned on.

[0039] During specific implementation, the above-mentioned third control switch 2111 is the normally closed contact of the sixth relay KT4. The third coil circuit 2112 includes the coils of the seventh relay KM4 and the eighth relay KT2 connected in parallel. The normally open contact of the seventh relay KM4 is electrically connected in the auxiliary power supply circuit 112 (as Figure 2b shown). Also, the above-mentioned fourth control switch 2121 is the normally open contact of the eighth relay KT2. The fourth coil circuit 2122 includes the coils of the ninth relay KM2 and the third relay KT3 connected in parallel. The normally open contact of the ninth relay KM2 is electrically connected in the charging pile charging circuit 111 (as Figure 2bAs shown). The normally closed contact of the third relay KT3 is electrically connected to the on-vehicle charger control circuit 22, and one end of the normally closed contact of the third relay KT3 is electrically connected to the first contact in the selection circuit. When the selection switch in the selection circuit contacts the second contact (pile contact), since the coil of the sixth relay KT4 in the on-vehicle charger control circuit 22 loses power, the normally closed contact of the sixth relay KT4 remains normally closed. At this time, the third control circuit 211 is in a conducting state, and the coils of the seventh relay KM4 and the eighth relay KT2 in the third control circuit 211 are energized. When the coil of the seventh relay KM4 is energized, it will control the normally open contact of the seventh relay KM4 in the auxiliary power supply circuit 112 to close, and at this time, the auxiliary power supply circuit 112 is conducting. When the coil of the eighth relay KT2 is energized, it will cause the normally open contact of the eighth relay KT2 in the fourth control circuit 212 to close, and further, the fourth control circuit 212 is in a conducting state, and the coils of the ninth relay KM2 and the third relay KT3 in the fourth control circuit 212 are energized. When the coil of the ninth relay KM2 is energized, it will control the normally open contact of the ninth relay KM2 in the charging pile charging circuit 111 to close, making the charging pile charging circuit 111 conducting. When the coil of the third relay KT3 is energized, it will control the normally closed contact of the third relay KT3 in the on-vehicle charger control circuit 22 to disconnect, making the on-vehicle charger control circuit 22 disconnect. When the on-vehicle charger control circuit 22 disconnects, the coil of the sixth relay KT4 included in the on-vehicle charger control circuit 22 is also in a power-off state, thus controlling the normally closed contact of the sixth relay KT4 in the third control circuit 211 to remain normally closed, making the third control circuit 211 conducting.

[0040] Further, a charging pile charging indication device (i.e., the Figure 3b pile charging indication device shown in) is also provided in the above-mentioned fourth control circuit 212. One end of this charging pile charging indication device is electrically connected to the fourth coil circuit, and the other end is electrically connected to the positive pole of the power supply busbar. The charging pile charging indication device can be, but is not limited to, at least one of the following: an indicator light, a voice prompt device, a prompt screen, etc. In Figure 3b an example, the charging pile charging indication device shown is an indicator light.

[0041] Continue to refer to Figure 3bAs shown in the figure, in addition to the aforementioned circuits, other circuits are also provided in the control circuit 2, such as an external power supply circuit 24 and a control panel. One end of the external power supply circuit 24 is electrically connected to the power supply busbar, and the other end is used as an input terminal to receive the low-voltage DC 12-volt voltage provided by the external power supply. The control panel is also called a remote control panel, and a control device can be provided on the control panel. The control device can be, but is not limited to, a three-position selector switch. The operation mode of the three-position selector switch can be, but is not limited to, a rotary type, a sliding type, etc. The control device is electrically connected to the selection circuit 23. By manually operating the control device, the user can make the selector switch in the selection circuit 23 contact the first contact or the second contact. The selection circuit 23 may also include a third contact (such as Figure 3b the OFF contact shown in Figure 3b ), and this third contact is used to cut off all circuits connected to the control device. In this application, the first contact, the second contact, and the third contact in the selection circuit 23 can also be respectively called the charger charging gear (marked as OBC gear), the charging pile charging gear (i.e., the DC charging gear, marked as pile gear), and the off gear (marked as OFF gear). Among them, the third contact is generally located in the middle position between the first contact and the second contact. When it is necessary to stop charging the battery device by the on-vehicle charger method or stop charging the battery device by the charging pile method, the selector switch in the selection circuit can be operated to contact the third contact.

[0042] It should be supplemented and explained for the whole of this embodiment here that: in this application, the first relay KA1, the third relay KT3, and the sixth relay KT4 are intermediate relays; the fifth relay KM3, the seventh relay KM4, and the ninth relay KM2 are DC relays; the fourth relay KT1 and the eighth relay KT2 are delay-off relays (the delay time is adjustable); the second relay KM1 is an AC relay.

[0043] In summary, the charging conversion system provided by this application can be briefly described as follows:

[0044] The charging conversion system is mainly composed of two parts: the main charging circuit 1 and the control circuit 2 of the main charging circuit. Among them,

[0045] The main charging circuit 1 is a power circuit, which includes a charging pile charging circuit 111, an auxiliary power supply circuit 112, a vehicle-mounted charger charging circuit 121, an AC power supply circuit 122, and a DC charging output circuit 13. The charging pile charging circuit 111 and the vehicle-mounted charger charging circuit 121 are connected in parallel on the DC busbar (a DC busbar of DC 116V) and are electrically connected to the DC charging output circuit 13 through the DC busbar and output to the battery device. The charging pile charging circuit 111 and the vehicle-mounted charger charging circuit 121 cannot work simultaneously and are mutually exclusive. The auxiliary power supply circuit 112 is controlled by a relay to be turned on and off, and can realize the connection and disconnection of the communication interaction between the charging pile and the battery management module (BMS).

[0046] The control circuit 2 is composed of an external power supply circuit 24 (used to access a low-voltage DC 12V input), a charging pile control circuit 21, a vehicle-mounted charger control circuit 22, and a selection circuit 23, and is also configured with a corresponding indicating device to display the current charging method. The charging pile control circuit 21, the vehicle-mounted charger control circuit, and the selection circuit need to have a 12V power supply connected to the external power supply circuit to work properly. The selection circuit 23 includes a selection switch, a first contact (OBC gear), a second contact (DC pile gear), and a third contact (OFF gear).

[0047] Through the above main charging circuit 1 and control circuit 2, the provided charging conversion system can achieve the following two charging methods:

[0048] (1) Vehicle-mounted charger charging (OBC charging)

[0049] Select the OBC gear through the selection switch. The normally closed contact of the third relay KT3 remains normally closed because the coil of the first relay KT3 loses power. The coils of the first relay KA1 and the fourth relay KT1 in the vehicle-mounted charger control circuit 22 are energized, correspondingly controlling the normally open contact of the first relay KA1 in the AC power supply circuit 122 and the normally open contact of the fourth relay KT1 in the vehicle-mounted charger control circuit 22 to be energized and closed (i.e., the normally open contact closes). The normally open contact of the fourth relay KT1 is energized and closed, causing the coils of the fifth relay KM3 and the sixth relay KT4 in the vehicle-mounted charger control circuit 22 to be energized. At this time, the normally open contact of the fifth relay KM3 in the vehicle-mounted charger charging circuit 121 is correspondingly controlled to close, and the normally closed contact of the sixth relay KT4 in the charging pile control circuit 21 is disconnected. As a result, the coil of the eighth relay KT2 and the coil of the seventh relay KM4 in the charging pile control circuit 21 lose power. Furthermore, the normally open contact of the eighth relay KT2 is disconnected, and the coil of the third relay KT3 and the coil of the ninth relay KM2 lose power. The coil of the third relay KT3 loses power, causing the normally closed contact of the third relay KT3 to remain closed. The coil of the ninth relay KM2 loses power, causing the normally open contact of the ninth relay KM2 in the charging pile charging circuit 111 to be disconnected. At this time, the vehicle-mounted charger charging indication device (such as an indicator light) lights up. The normally open contact of the ninth relay KM2 is disconnected, causing the charging pile charging circuit 111 to be disconnected. The coil of the seventh relay KM4 loses power, causing the normally open contact of the seventh relay KM4 to be disconnected, and the auxiliary power supply circuit 112 is also disconnected. When there is alternating current (single-phase AC shore power) input in the AC power supply circuit 122, the coil of the second relay KM1 will be energized, and then the normally open contact of the second relay KM1 is energized and closed, and the vehicle-mounted charger starts to work, charging the battery device through the vehicle-mounted charger charging circuit 121 and the charging output circuit 13. During this process, the coil of the ninth relay KM2 in the charging pile control circuit 21 is always de-energized, and the normally open contact of the ninth relay KM2 in the corresponding charging pile charging circuit 111 remains disconnected. Therefore, the function of mutual exclusion that the vehicle-mounted charger charging and the charging pile charging cannot work simultaneously is achieved.

[0050] When it is necessary to stop the charging of the load-carrying charger, the selector switch can be turned to the OFF position. At this time, the coils of the first relay KA1 and the fourth relay KT1 in the control circuit 22 of the load-carrying charger will lose power, which in turn causes the normally open contacts of the first relay KA1 in the AC power supply circuit 122 to disconnect. Accordingly, the coil of the second relay KM1 loses power, and the normally open contacts of the second relay KM1 lose power and disconnect, and the load-carrying charger enters the stop output process. The normally open contacts of the fourth relay KT1 in the control circuit 22 of the load-carrying charger will lose power and disconnect after a first set time delay (such as 1 s). Therefore, the coils of the fifth relay KM3 and the sixth relay KT4 in the control circuit 22 of the load-carrying charger will lose power after a first set time delay (such as 1 s). The normally closed contacts of the sixth relay KT4 in the charging pile control circuit 21 will close after a delay, and the normally open contacts of the fifth relay KM3 in the charging circuit 121 of the load-carrying charger will disconnect after a delay. At this time, the load-carrying charger has stopped working and there is no current output, avoiding large current cut-off of the contacts of the fifth relay KM3 and causing device damage.

[0051] (2) Charging of the charging pile (DC charging pile charging)

[0052] After the indicating device of the load-carrying charger, such as the indicator light, goes out, the selector switch needs to be adjusted from the OFF position to the DC charging position (pile position). The normally closed contact KT4 in the charging pile control circuit 21 remains normally closed due to the loss of power of the coil of the sixth relay KT4. The coils of the seventh relay KM4 and the eighth relay KT2 in the charging pile control circuit 21 will be powered on, and the normally open contacts of the seventh relay KM4 in the auxiliary power supply circuit 112 and the normally open contacts of the eighth relay KT2 in the charging pile control circuit 21 will be powered on and attracted. The normally open contact of the eighth relay KT2 is attracted, causing the coils of the ninth relay KM2 and the third relay KT3 to be powered on. At this time, the normally open contact of the ninth relay KM2 in the charging circuit 111 of the charging pile closes, and the normally closed contact of the third relay KT3 in the control circuit of the load-carrying charger disconnects, and the charging indication device of the charging pile, such as the indicator light, lights up. When the charging gun of the charging pile is connected to the DC charging socket, the DC charging auxiliary power supply signal A+ can be output to the battery device to complete the communication handshake interaction (specifically, complete the communication handshake interaction with the battery management module BMS in the battery device), and the charging pile starts to work and charges the battery device through the charging circuit 111 of the charging pile and the DC charging output circuit 13. During this process, the coil of the fifth relay KM3 in the control circuit 22 of the load-carrying charger is always powered off, and the normally open contact of the fifth relay KM3 in the charging circuit 121 of the load-carrying charger remains disconnected. Therefore, the function of mutual exclusion that the load-carrying charger charging and the DC charging pile charging cannot work simultaneously is realized.

[0053] When it is necessary to stop charging the DC charging pile, turn the selection switch to the OFF position. The coils of the seventh relay KM4 and the eighth relay KT2 in the charging pile control circuit 21 will lose power, and the normally open contacts of the seventh relay KM4 will lose power and disconnect A+ communication interaction. The DC charging pile enters the stop output process. When the coil of the eighth relay KT2 loses power, the normally open contact of the eighth relay KT2 in the charging pile control circuit 21 will lose power and delay for a second set time (such as 5s) to disconnect. Therefore, the coils of the ninth relay KM2 and the third relay KT3 in the charging pile control circuit 21 will lose power after a delay of the second set time (such as 5s). The normally closed contact of the sixth relay KT4 will close after a delay, and the normally open contact of the ninth relay KM2 will open after a delay. At this time, the DC charging pile has stopped working and there is no current output, avoiding damage to the device caused by the large current cut-off of the contacts of the ninth relay KM2.

[0054] In addition to using the charging conversion system described in this application in combination with Figure 1 , Figures 2a - 2b and Figures 3a - 3b to realize the switching between the two charging methods of charging the charging pile and charging the in-vehicle charger, other solutions can also be used. For example, a charging interface can be added to the high-voltage box (High Voltage Box, HVB) of the battery system, and the battery control unit (Battery Control Unit, BCU) in the high-voltage box can be used to select and manage the charging equipment. The BCU is a functional part of the battery management device (BMS). Among them, the high-voltage box is a device that boosts the output of high-voltage electricity after paralleling multiple low-voltage battery units. As shown in Figure 4 , the specific implementation of this solution can be as follows:

[0055] Inside the high-voltage box 3, a control unit 31, a first charging interface 32 (a fast-charging communication interface), and a second charging interface 33 (a slow-charging communication interface) are provided. The control unit 31 is a BCU, which is a control unit in the high-voltage box 3 for uniformly managing multiple connected batteries. One end of the control unit 31 is electrically connected to the first charging interface 32, and the other end is electrically connected to the second charging interface 33. The above-mentioned first charging interface 32 is also electrically connected to the first end of the DC charging socket, and the DC charging socket is used for the charging gun of the charging pile to be inserted. Inside the high-voltage box 3, there is also a DC busbar. And, the above-mentioned DC charging socket is electrically connected to the DC busbar. Specifically, the DC charging socket also has a second end and a third end, where the second end is electrically connected to the positive pole of the DC busbar, and the third end is electrically connected to the negative pole of the DC busbar. And, the above-mentioned second charging interface 33 is also electrically connected to the first end of the AC-DC converter. The AC-DC converter also has a second end and a third end, where the second end is used to be electrically connected to the DC busbar, and the third end is the input end for AC input, and the AC can be single-phase shore power AC. Specifically, the second end of the AC-DC converter includes a first connection pin and a second connection pin, the first connection pin is electrically connected to the positive pole of the DC busbar, and the second connection pin is electrically connected to the negative pole of the DC busbar.

[0056] Furthermore, inside the high-voltage box 3, there are also a fast-charging control switch 34 and a slow-charging control switch 35. The second end of the DC charging socket is electrically connected to the positive pole of the DC busbar through the fast-charging control switch 34. And, the first connection pin in the second end of the AC-DC converter is electrically connected to the positive pole of the DC busbar through the slow-charging control switch 35.

[0057] And, the battery device is electrically connected to the DC busbar inside the high-voltage box.

[0058] The above-mentioned control unit 31 is used to select whether to charge with a charging pile or with a vehicle-mounted charger. For example, when the control unit 31 selects to charge with a vehicle-mounted charger through the second charging interface 33, the input AC will be converted into DC by the AC-DC converter and then output, which will make the slow-charging control switch 35 get powered and closed, and the slow-charging circuit between the AC-DC converter and the DC busbar will be conducted. Thus, the DC can flow through the slow-charging circuit through the DC busbar to the battery device. When the control unit 31 selects to charge with a charging pile through the first charging interface 32, the charging pile starts to work, and the DC output by the charging gun of the charging pile inserted into the DC charging socket will make the fast-charging control switch 34 get powered and closed. Then, the fast-charging circuit between the DC charging socket and the DC busbar will be conducted. Thus, the DC can flow through the fast-charging circuit through the DC busbar to the battery device.

[0059] Among them, the slow charging control switch 35 and the fast charging control switch 34 can be normally open contacts of corresponding relays. Specifically, the slow charging control switch 35 is the normally open contact of the slow charging relay, and the fast charging control switch 34 is the normally open contact of the fast charging relay.

[0060] There is a coil of the slow charging relay in the circuit between the slow charging control switch 35 and the AC / DC converter. The direct current output by the AC / DC converter will energize the coil of the slow charging relay, thereby controlling the normally open contact of the slow charging relay (i.e., the slow charging control switch 35) to close. Also, there is a coil of the fast charging relay in the circuit between the fast charging control switch 34 and the DC charging socket. The direct current output by the DC charging socket will energize the coil of the fast charging relay, thereby controlling the normally open contact of the fast charging relay (i.e., the fast charging control switch 34) to close.

[0061] Another embodiment of the present application provides a battery system, which includes: a battery device and the charging conversion system provided in other embodiments of the present application. The battery device is electrically connected to the charging pile charging module and the vehicle-mounted charger charging module in the charging conversion system.

[0062] Among them, the battery device may include a battery module and a battery management module (BMS). The battery module can be composed of one or more battery cells. The battery cell can be, but is not limited to, a lithium battery cell. The battery management module (BMS) is used to monitor and manage the state of the battery module to ensure its safe and efficient operation. Specifically, the main functions of the BMS include, but are not limited to: state monitoring (real-time monitoring of parameters such as the voltage, current, and temperature of the battery cells), balancing control (balancing the charging state between the battery cells in the battery module by hardware or software methods to prevent overcharging or over-discharging and extend the battery life), protection mechanism (automatically taking measures to protect the battery from damage when abnormal situations such as overvoltage, undervoltage, overcurrent, short circuit, or high temperature are detected), data recording and communication (recording the working data of the battery and supporting communication with external devices for easy user monitoring and maintenance).

[0063] For the detailed description of the charging conversion system, reference can be made to the relevant content in other embodiments, and specific details will not be elaborated here.

[0064] The battery system provided in this embodiment is applied to waterborne mobile devices. Therefore, the present application also provides a waterborne mobile device, which includes the battery system provided in other embodiments of the present application.

[0065] In specific implementation, the waterborne mobile device can be a ship, such as a commercial ship, passenger ship, yacht, fishing boat, sailboat, civilian ship and other various waterborne transportation devices. In addition, the waterborne mobile device can also be a water patrol device, water treatment device, water environment monitoring device, water robot and other devices that can move on water. This embodiment does not make any limitation thereto.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging conversion system, characterized in that: A charging main circuit and a control circuit of the charging main circuit are included; The main charging circuit includes a charging pile charging module and a loadable charger charging module connected in parallel; The control circuit includes a selection circuit, a charging pile control circuit and a loadable charger control circuit electrically connected to the selection circuit; wherein, The selection circuit has a first mode and a second mode. The first mode is used to turn on the loadable charger control circuit to control the charging module of the loadable charger to be turned on, and to disconnect the charging pile control circuit to control the charging pile charging module to be disconnected; the second mode is used to turn on the charging pile control circuit to control the charging pile charging module to be turned on, and to disconnect the loadable charging pile control circuit to control the charging module of the loadable charger to be disconnected.

2. The charging conversion system according to claim 1, characterized in that: The main charging circuit also includes: a DC charging output circuit and a DC busbar; The DC charging output circuit is electrically connected to the charging pile charging module and the loadable charger charging module through the DC busbar.

3. The charging conversion system according to claim 2, characterized in that: The charging pile charging module includes a charging pile charging circuit and an auxiliary power supply circuit; The charging pile charging circuit is electrically connected to the DC busbar; The auxiliary power supply circuit is used for the external charging pile to communicate and handshake with the external battery device; After the communication handshake is completed, the charging pile starts charging to input direct current into the charging circuit of the charging pile.

4. The charging conversion system according to claim 2, characterized in that: The loadable charger charging module comprises: a loadable charger charging circuit, an AC power supply circuit and an AC / DC converter; One end of the charging circuit of the loadable charger is electrically connected to the DC busbar, and the other end is electrically connected to the AC power supply circuit through the AC-DC converter; The AC / DC converter is used to convert the AC power output by the AC power supply circuit into DC power, and transmit the DC power to the charging circuit of the loadable charger.

5. The charging conversion system according to claim 4, characterized in that: When the loadable charger control circuit is turned on, part of the circuit in the AC power supply circuit is turned on; when AC power is input to the AC power supply circuit, the AC power supply circuit is completely turned on.

6. The charging conversion system according to claim 4 or 5, characterized in that: The loadable charger control circuit includes: a first control circuit and a second control circuit; When the first control circuit is turned on, controlling the AC power supply circuit to be turned on and the second control circuit to be turned on; When the second control circuit is turned on, the charging circuit of the loadable charger is controlled to be turned on.

7. The charging conversion system according to claim 6, characterized in that: The first control circuit comprises a first control switch and a first coil circuit electrically connected to the first control switch; The second control circuit comprises a second control switch and a second coil circuit electrically connected to the second control switch; When the first control switch is closed, the first control circuit is turned on, so that the first coil circuit is energized; The first coil circuit is energized to control the AC power supply circuit to be turned on and the second control switch to be closed; When the second control switch is closed, the second control circuit is turned on, so that the second coil circuit is energized; The second coil circuit is energized to control the charging circuit of the loadable charger to be turned on.

8. The charging conversion system according to claim 3, characterized in that: The charging pile control circuit includes: a third control circuit and a fourth control circuit; When the third control circuit is turned on, controlling the auxiliary power supply circuit to be turned on and the fourth control circuit to be turned on; When the fourth control circuit is turned on, the charging pile charging circuit is controlled to be turned on.

9. The charging conversion system according to claim 8, characterized in that: The third control circuit comprises a third control switch and a third coil circuit electrically connected to the third control switch; The fourth control circuit comprises a fourth control switch and a fourth coil circuit electrically connected to the fourth control switch; When the third control switch is closed, the third control circuit is turned on, so that the third coil circuit is energized; The third coil circuit is powered, controlling the auxiliary power supply circuit to be turned on and the fourth control switch to be closed; When the fourth control switch is closed, the fourth control circuit is turned on, so that the fourth coil circuit is powered; The fourth coil circuit is energized to control the charging circuit of the charging pile to be turned on.

10. The charging conversion system according to claim 1, characterized in that: The control circuit also includes a power supply busbar; the selection circuit includes a selection switch, a first contact and a second contact; One end of the selection switch is electrically connected to the power supply busbar, and the other end can be switched to contact with one of the first contact and the second contact; wherein, when the other end of the selection switch contacts the first contact, the selection circuit is in the first mode; when the other end of the selection switch contacts the second contact, the selection circuit is in the second mode; The first contact is electrically connected to one end of the loadable charger control circuit, and the other end of the loadable charger control circuit is electrically connected to the power supply busbar; The second contact is electrically connected to one end of the charging pile control circuit, and the other end of the charging pile control circuit is electrically connected to the power supply busbar.

11. The charging conversion system according to claim 10, characterized in that: The loadable charger control circuit includes a first control circuit and a second control circuit; One end of the first control circuit is electrically connected to the first contact, and the other end is electrically connected to the power supply busbar; when the first control circuit is turned on, the second control circuit is controlled to be turned on; The second control circuit is electrically connected to the power supply busbar; when the second control circuit is turned on, it also controls the charging pile control circuit to be disconnected; when the charging pile control circuit is disconnected, it controls the first control circuit to be turned on.

12. The charging conversion system according to claim 11, characterized in that: The second control circuit is provided with a charging indicating device of a loadable charger.

13. The charging conversion system according to claim 10, characterized in that: The charging pile control circuit includes a third control circuit and a fourth control circuit; One end of the third control circuit is electrically connected to the second contact, and the other end is electrically connected to the power supply busbar; when the third control circuit is turned on, the fourth control circuit is controlled to be turned on; The fourth control circuit is electrically connected to the power supply busbar; when the fourth control circuit is turned on, it also controls the loadable charger control circuit to be disconnected; when the loadable charger control circuit is disconnected, it controls the third control circuit to be turned on.

14. The charging conversion system according to claim 13, characterized in that: The fourth control circuit is provided with a charging pile charging indication device.

15. A battery system, characterized in that: include: Battery device; The charging conversion system according to any one of claims 1 to 14, wherein the battery device is electrically connected to the charging pile charging module and the loadable charger charging module in the charging conversion system.

16. A movable device in water area, characterized in that: The movable device in water area comprises the battery system as claimed in claim 15 above.

Images