Direct-current charging system capable of changing electricity

Abstract

The utility model discloses a battery-replaceable DC charging system, which comprises a charging controller, a DCDC charging module, a BMS controller and a plurality of battery pack groups, a control system is connected between the DCDC charging module and the battery pack groups, and the control system comprises a plurality of switches; the battery pack group comprises one or more battery packs and is used for providing a power source for the battery-replaceable direct-current charging system; and the DCDC charging module is used for converting the direct current output by each battery pack in the battery pack group into another direct current with different voltage and current, and outputting the direct current to the electric vehicle. According to the utility model, the problem of on-line replacement of the battery packs in a normal working state of the charging system is solved, and the charging system is ensured to work in an optimal state for a longer time by actively controlling series and parallel connection among the battery packs.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile charging, in particular to a battery-exchangeable direct current charging system. Background Art

[0002] In the prior art, there is a DC charging control system and a DC charging system with publication number CN209351268U. The utility model embodiment provides a DC charging control system and a DC charging system to realize secure communication between the DC charging control system and the DC charging system, reduce the risk of system data and protocols being controlled by a third party, and avoid security risks and losses caused by the capture or decryption of communication data during transmission. The DC charging control system can be used to charge electric vehicles with high power, and may include: a control module, which can be used to control the DC charging system to charge electric vehicles that have charging conditions with it; and a communication module connected to the control module, which is used to realize communication connection between the control module and other modules of the DC charging system and electric vehicles that have charging conditions with it, wherein the communication module includes an encryption module, which is used to encrypt the communication data of the control module. When replacing the battery pack, the DC charging control system is prone to affect the problem of online replacement of the battery pack under the normal working state of the charging system.

[0003] To sum up the above problems, we propose a replaceable DC charging system. Utility Model Content

[0004] The purpose of the utility model is to provide a replaceable DC charging system to solve the existing problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A battery-swappable DC charging system, comprising:

[0007] A charging controller, a DCDC charging module, a BMS controller, and several battery packs, wherein the DCDC charging module and the battery pack are connected to a control system, and the control system includes several switches;

[0008] The battery pack group includes one or more battery packs for providing a power source for the replaceable DC charging system;

[0009] The DCDC charging module is used to convert the direct current output by each battery pack in the battery pack group into another direct current with different voltage and current, and output it to the electric vehicle.

[0010] Preferably, the DCDC charging module is controlled by a charging controller and outputs direct current of different voltages and currents according to the requirements of the charging controller.

[0011] Preferably, the BMS controller is connected to the control system of each battery pack in the battery pack group, collects battery data of each battery pack, and sends the battery pack information to the charging controller via the CAN communication bus.

[0012] Preferably, the control system includes a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, a switch S6, a switch S7, a switch S8, a switch S9, a switch S10, and a switch S11.

[0013] Preferably, the battery pack group includes battery pack PACK1, battery pack PACK2, battery pack PACK3, and battery pack PACK4.

[0014] Preferably, the positive electrode access line of the battery pack PACK1 is connected to the switch S1 and the switch S5, and the negative electrode access line is connected to the switch S6;

[0015] The positive access line of the battery pack PACK2 is connected to the switch S2 and the switch S7, and the negative access line is connected to the negative access line of the DCDC charging module;

[0016] The positive electrode access line of the battery pack PACK3 is connected to the switch S3 and the switch S8, and the negative electrode access line is connected to the switch S9;

[0017] The positive electrode access line of the battery pack PACK4 is connected to the switch S4 and the switch S10, and the negative electrode access line is connected to the negative electrode access line of the DCDC charging module.

[0018] Preferably, the positive electrode access line of the battery pack PACK1 is connected to the switch S1 and the switch S5, and the negative electrode access line is connected to the switch S6;

[0019] The positive electrode access line of the battery pack PACK2 is connected to the switch S2 and the switch S7, and the negative electrode access line is connected to the switch S7;

[0020] The positive electrode access line of the battery pack PACK3 is connected to the switch S3 and the switch S9, and the negative electrode access line is connected to the switch S10;

[0021] The positive electrode access line of the battery pack PACK4 is connected to the switch S4 and the switch S11, and the negative electrode access line is connected to the negative electrode access line of the DCDC charging module.

[0022] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0023] The utility model solves the problem of online replacement of battery packs without affecting the normal working state of the charging system, and ensures that the charging system works in the best state for a longer time by actively controlling the series and parallel connections between the battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a schematic diagram of Embodiment 1 of the present utility model;

[0025] Figure 2 This is a schematic diagram of Example 2 of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Example 1: Figure 1 As shown, a battery-swappable DC charging system is characterized by comprising:

[0028] A charging controller, a DCDC charging module, a BMS controller, and several battery packs, wherein the DCDC charging module and the battery pack are connected to a control system, wherein the control system includes several switches, including switch S1, switch S2, switch S3, switch S4, switch S5, switch S6, switch S7, switch S8, switch S9, switch S10, and switch S11, and the battery pack includes battery pack PACK1, battery pack PACK2, battery pack PACK3, and battery pack PACK4;

[0029] The battery pack group includes one or more battery packs for providing a power source for the replaceable DC charging system;

[0030] The DCDC charging module is used to convert the DC power output by each battery pack in the battery pack group into another DC power with different voltage and current, and output it to the electric vehicle;

[0031] The DCDC charging module is controlled by a charging controller and outputs direct current of different voltages and currents according to the requirements of the charging controller;

[0032] The BMS controller is connected to the control system of each battery pack in the battery pack group, collects battery data of each battery pack, and sends the battery pack information to the charging controller through the CAN communication bus.

[0033] Preferably, the positive electrode access line of the battery pack PACK1 is connected to the switch S1 and the switch S5, and the negative electrode access line is connected to the switch S6;

[0034] The positive access line of the battery pack PACK2 is connected to the switch S2 and the switch S7, and the negative access line is connected to the negative access line of the DCDC charging module;

[0035] The positive electrode access line of the battery pack PACK3 is connected to the switch S3 and the switch S8, and the negative electrode access line is connected to the switch S9;

[0036] The positive electrode access line of the battery pack PACK4 is connected to the switch S4 and the switch S10, and the negative electrode access line is connected to the negative electrode access line of the DCDC charging module.

[0037] Among them, by controlling the closed state of the circuit switches S5-S8, each battery pack can work in series or parallel as needed to meet the power output requirements of the battery pack;

[0038] Switch S1 is the output switch of battery pack PACK1. When battery pack PACK1 is replaced, S1 is disconnected. When switch S1 is detected to be open, the charging controller interlocks and controls switches S5 and S6 to open, and selects the second switch S7 to close, ensuring that the positive pole of battery pack PACK2 is connected to the positive pole of the input DC bus of the DCDC charging module. At this time, battery pack PACK1 can be safely removed without affecting the operation of the entire system.

[0039] In Case 1, battery pack PACK1 and battery pack PACK2 form a group, which can be switched in series or in parallel. Battery pack PACK3 and battery pack PACK4 form a group, which can be switched in series or in parallel, and the two groups are connected in parallel.

[0040] Embodiment 2: A battery-swappable DC charging system, comprising:

[0041] A charging controller, a DCDC charging module, a BMS controller, and several battery packs, wherein the DCDC charging module and the battery pack are connected to a control system, and the control system includes several switches;

[0042] Preferably, the positive electrode access line of the battery pack PACK1 is connected to the switch S1 and the switch S5, and the negative electrode access line is connected to the switch S6;

[0043] The positive access line of the battery pack PACK2 is connected to the switch S2 and the switch S7, and the negative access line is connected to the switch S7;

[0044] The positive electrode access line of the battery pack PACK3 is connected to the switch S3 and the switch S9, and the negative electrode access line is connected to the switch S10;

[0045] The positive electrode access line of the battery pack PACK4 is connected to the switch S4 and the switch S11, and the negative electrode access line is connected to the negative electrode access line of the DCDC charging module.

[0046] Among them, each pack battery pack can be connected in series or in parallel.

[0047] In combination with Embodiments 1 and 2, specifically, a control method for a battery-swappable DC charging system includes the following steps:

[0048] The charging controller communicates with the DCDC charging module, BMS controller, various circuit switches, and electric vehicles through the CAN bus, and controls the opening and closing of each circuit switch based on the collected information, so that the output DC power of the battery pack meets the working requirements of the DCDC charging module. At the same time, it controls the DCDC charging module to transform the charging DC output power according to the charging requirements of the electric vehicle.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery-swappable DC charging system, characterized in that: include: A charging controller, a DCDC charging module, a BMS controller, and several battery packs, wherein the DCDC charging module and the battery pack are connected to a control system, and the control system includes several switches; The battery pack group includes one or more battery packs for providing a power source for the replaceable DC charging system; The DCDC charging module is used to convert the direct current output by each battery pack in the battery pack group into another direct current with different voltage and current, and output it to the electric vehicle.

2. A battery-swappable DC charging system according to claim 1, characterized in that: The DCDC charging module is controlled by a charging controller and outputs direct current of different voltages and currents according to the requirements of the charging controller.

3. A battery-swappable DC charging system according to claim 1, characterized in that: The BMS controller is connected to the control system of each battery pack in the battery pack group, collects battery data of each battery pack, and sends the battery pack information to the charging controller through the CAN communication bus.

4. A battery-swappable DC charging system according to claim 1, characterized in that: The control system includes a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, a switch S6, a switch S7, a switch S8, a switch S9, a switch S10, and a switch S11.

5. The battery-swappable DC charging system according to claim 1, characterized in that: The battery pack group includes a battery pack PACK1, a battery pack PACK2, a battery pack PACK3, and a battery pack PACK4.

6. A battery-swappable DC charging system according to claim 5, characterized in that: The positive electrode access line of the battery pack PACK1 is connected to the switch S1 and the switch S5, and the negative electrode access line is connected to the switch S6; The positive access line of the battery pack PACK2 is connected to the switch S2 and the switch S7, and the negative access line is connected to the negative access line of the DCDC charging module; The positive electrode access line of the battery pack PACK3 is connected to the switch S3 and the switch S8, and the negative electrode access line is connected to the switch S9; The positive electrode access line of the battery pack PACK4 is connected to the switch S4 and the switch S10, and the negative electrode access line is connected to the negative electrode access line of the DCDC charging module.

7. A battery-swappable DC charging system according to claim 6, characterized in that: The positive electrode access line of the battery pack PACK1 is connected to the switch S1 and the switch S5, and the negative electrode access line is connected to the switch S6; The positive electrode access line of the battery pack PACK2 is connected to the switch S2 and the switch S7, and the negative electrode access line is connected to the switch S7; The positive electrode access line of the battery pack PACK3 is connected to the switch S3 and the switch S9, and the negative electrode access line is connected to the switch S10; The positive electrode access line of the battery pack PACK4 is connected to the switch S4 and the switch S11, and the negative electrode access line is connected to the negative electrode access line of the DCDC charging module.

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