Battery pack power distribution system and electric vehicle

Abstract

The invention relates to a battery pack of an electric vehicle, and provides a battery pack power distribution system which comprises a battery pack (1), the battery pack (1) comprises a first BDU (11), a second BDU (12) and a power battery (13), the first end of the first BDU (11) is electrically connected to a first charging port (2) through a first charging loop (4), the second end of the first BDU (11) is electrically connected to the power battery (13), and the second end of the second BDU (12) is electrically connected to a second charging port (2) through a second charging loop (4). The first end of the second BDU (12) is electrically connected to the second charging port (3) through a second charging loop (5), and the second end of the second BDU (12) is electrically connected to the power battery (13). The battery pack power distribution system is high in space utilization rate, and double-gun quick charging of the electric vehicle is achieved under the condition that the space requirement of a passenger compartment is met. The invention further provides an electric vehicle.

Description

Technical Field

[0001] The present invention relates to a battery pack of an electric vehicle, and in particular to a battery pack power distribution system. In addition, the present invention also relates to an electric vehicle. Background Art

[0002] With the development of battery technology, high-rate charging and discharging can be achieved without affecting the cycle life. High-rate charging and discharging is crucial for the rapid energy replenishment of electric vehicles. Given that the power of a single gun of the existing national standard charging piles is upper bounded, the current way to achieve rapid energy replenishment of electric vehicles is to introduce dual-gun charging.

[0003] The dual-gun charging solution was first introduced on commercial vehicles. Its topology is as follows: Figure 1 For the dual-gun charging used in commercial vehicles, since the commercial vehicle body has a large space and the space utilization rate is not high, there is a PDU (power distribution unit) external to the battery pack to control the charging and discharging of the battery; for traditional passenger cars, its topology is as follows Figure 2 As shown in the figure, due to its small body size, the space requirements of the passenger compartment must be met first, so passenger cars generally use a BDU (battery disconnect unit) built into the battery pack to control the charging and discharging of the battery. Therefore, for cost control and space utilization considerations, the dual-gun charging design concept related to commercial vehicles cannot be used. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a battery pack power distribution system, which has high space utilization and realizes dual-gun fast charging of electric vehicles while meeting the space requirements of the passenger compartment.

[0005] The technical problem that the present invention also solves is to provide an electric vehicle that can perform dual-gun fast charging and has a high battery pack space utilization rate to meet the space requirements of the passenger compartment.

[0006] In order to solve the above technical problems, the present invention provides a battery pack power distribution system, including a battery pack, the battery pack including a first BDU, a second BDU and a power battery, the first end of the first BDU is electrically connected to a first charging port through a first charging circuit, the second end of the first BDU is electrically connected to the power battery, the first end of the second BDU is electrically connected to the second charging port through a second charging circuit, and the second end of the second BDU is electrically connected to the power battery.

[0007] As a specific embodiment, the second end of the second BDU is electrically connected to the first end of the first BDU.

[0008] As a specific embodiment, the first BDU includes a first positive contactor and a first negative contactor, the first end of the first positive contactor is electrically connected to the positive line of the first charging circuit, the second end of the first positive contactor is electrically connected to the positive electrode of the power battery, the first end of the first negative contactor is electrically connected to the negative line of the first charging circuit, and the second end of the first negative contactor is electrically connected to the negative electrode of the power battery.

[0009] As a specific embodiment, the first BDU includes a first pre-charging unit, and the first pre-charging unit is connected in parallel with the first positive contactor.

[0010] As a specific embodiment, the second BDU includes a second positive contactor and a second negative contactor, the first end of the second positive contactor is electrically connected to the positive line of the second charging circuit, the second end of the second positive contactor is electrically connected to the first end of the first positive contactor, the first end of the second negative contactor is electrically connected to the negative line of the second charging circuit, and the second end of the second negative contactor is electrically connected to the first end of the first negative contactor.

[0011] As a specific embodiment, the second BDU includes a second pre-charging unit, and the second pre-charging unit is connected in parallel with the second positive contactor.

[0012] As a specific embodiment, the battery pack is provided with a first copper busbar for transmitting electric energy from the first BDU to a first high-voltage connector and a second copper busbar for transmitting electric energy from the first BDU to a second high-voltage connector, the first high-voltage connector is electrically connected to a first motor drive, the second high-voltage connector is electrically connected to a second motor drive, the first BDU is arranged in an arrangement space corresponding to the first high-voltage connector in the battery pack, the second BDU is arranged in an arrangement space corresponding to the second high-voltage connector in the battery pack, and the second end of the second BDU is electrically connected to the first end of the first BDU through the second copper busbar;

[0013] The first motor drive is one of a front motor drive and a rear motor drive, and the second motor drive is another one.

[0014] As a specific embodiment, the first charging circuit is provided with a boost circuit, the first charging circuit is configured as a boost charging circuit, and the second charging circuit is configured as a DC charging circuit.

[0015] As a specific embodiment, the first charging port is an integrated AC / DC charging port, the second charging port is a DC charging port, the DC interface of the integrated AC / DC charging port is electrically connected to the first charging circuit, the AC interface of the integrated AC / DC charging port is electrically connected to the first end of the AC charging circuit, the second end of the AC charging circuit is electrically connected to a portion of the first charging circuit located between the boost circuit and the first end of the first BDU, and the AC charging circuit is provided with a vehicle-mounted charger.

[0016] The present invention also provides an electric vehicle, comprising the battery pack power distribution system described in any one of the above technical solutions.

[0017] Through the above scheme, the beneficial effects of the present invention are as follows:

[0018] The battery pack power distribution system of the present invention realizes a dual charging circuit to charge the power battery of the electric vehicle through the first BDU and the second BDU, thereby improving the charging power and reducing the charging waiting time; at the same time, there is no need to set a PDU component outside the battery pack, and the second BDU is integrated on the basis of the first BDU inside the battery pack, thereby reducing unnecessary space occupation, improving the space utilization of the whole vehicle, and being able to meet the space requirements of the passenger compartment.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a topological diagram of dual-gun charging for commercial vehicles in the prior art;

[0022] Figure 2 It is a single-gun charging topology diagram for passenger cars in the prior art;

[0023] Figure 3 is a topological diagram of a specific embodiment of the battery pack power distribution system of the present invention;

[0024] Figure 4 is a circuit diagram of a specific embodiment of the battery pack power distribution system of the present invention;

[0025] Figure 5 This is the circuit diagram of the first BDU;

[0026] Figure 6 This is the circuit diagram of the second BDU;

[0027] Figure 7is a circuit diagram of another specific embodiment of the battery pack power distribution system of the present invention;

[0028] Figure 8 It is a four-wheel drive structure topology diagram of an electric vehicle in the prior art;

[0029] Fig. 9 It is a structural schematic diagram of a specific embodiment of the electric vehicle of the present invention.

[0030] Description of Reference Numerals

[0031] 1-battery pack; 11-first BDU; 111-first positive contactor; 112-first negative contactor; 113-first pre-charging unit; 1131-first pre-charging contactor; 1132-first pre-charging resistor; 12-second BDU; 121-second positive contactor; 122-second negative contactor; 123-second pre-charging unit; 1231-second pre-charging contactor; 1232-second pre-charging resistor; 13-power battery; 131-battery master fuse; 14-BMS battery management system; 2-first charging port; 3-second charging port; 4-first charging circuit; 41-boost circuit; 42-filter capacitor; 43-sampling discharge resistor; 5-second charging circuit; 6-AC charging circuit; 7-on-board charger; 8-rear motor drive; 100-electric vehicle; 200-battery pack power distribution system. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "formed", "provided with", "set", "connected" and the like should be understood in a broad sense. For example, the connection can be a direct connection or an indirect connection through an intermediate medium, a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate connector, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise specified, the directions indicated by the directional words "front end" and "rear end" are the front end and rear end of the battery pack 1 in the vehicle coordinate system, that is, the front end is the direction facing the driver when the vehicle is in driving state, and the rear end is the opposite direction to the front end.

[0035] The present invention provides a battery pack power distribution system, see Figure 4-Figure 6 As a specific embodiment of the battery pack power distribution system of the present invention, the battery pack 1 includes a first BDU 11, a second BDU 12 and a power battery 13. The first end of the first BDU 11 is electrically connected to the first charging port 2 through the first charging circuit 4, and the second end of the first BDU 11 is electrically connected to the power battery 13. The first end of the second BDU 12 is electrically connected to the second charging port 3 through the second charging circuit 5, and the second end of the second BDU 12 is electrically connected to the power battery 13. The first charging port 2 and the second charging port 3 are respectively connected to an external DC charging pile, so that the power battery 3 of the electric vehicle can be charged by a dual charging circuit through the first BDU 11 and the second BDU 12, thereby improving the charging power and reducing the charging waiting time; at the same time, there is no need to set a PDU component outside the battery pack 1, and the second BDU is integrated on the basis of the first BDU inside the battery pack 1, thereby reducing unnecessary space occupation, improving the space utilization of the whole vehicle, and meeting the space requirements of the passenger compartment.

[0036] It should be noted that for the traditional single-gun charging car battery pack BDU, it is located at the front or rear end of the battery pack based on the front-wheel drive or rear-wheel drive design of the vehicle. However, due to the simple structure of the four-wheel drive design of electric vehicles, electric four-wheel drive vehicles are becoming more and more common. It is necessary to design a copper bar to cross the battery pack from the inside to meet the four-wheel drive design. The topology diagram is as follows Figure 8 As shown. As a preferred embodiment, when connected to an external DC charging pile, the second BDU12 charges the power battery 3 through the first BDU11. Therefore, when the second BDU12 is arranged, it can borrow the copper busbar designed for the battery pack corresponding to the four-wheel drive vehicle to improve the utilization rate of the internal space of the battery pack 1. Specifically, the battery pack 1 is provided with a first copper busbar for transmitting electric energy from the first BDU11 to the first high-voltage connector and a second copper busbar for transmitting electric energy from the first BDU11 to the second high-voltage connector. The first high-voltage connector is electrically connected to the first motor drive, and the second high-voltage connector is electrically connected to the second motor drive. The first BDU11 is arranged in the arrangement space corresponding to the first high-voltage connector in the battery pack 1, and the second BDU12 is arranged in the arrangement space corresponding to the second high-voltage connector in the battery pack 1. The second end of the second BDU12 is electrically connected to the first end of the first BDU11 through the second copper busbar; wherein the first motor drive is one of the front motor drive and the rear motor drive, and the second motor drive is another. See. Figure 3, taking the case where the first motor drive is the front motor drive and the second motor drive is the rear motor drive as an example, the first BDU11 is located at the front end of the battery pack 1, and the second copper bar crosses the battery pack from the inside and is located at the rear end, so that the first BDU11 transmits electrical energy to the second high-voltage connector corresponding to the rear motor drive, and the battery pack 1 does not have a simultaneous charging and discharging condition. Therefore, the second copper bar reserved for power transmission corresponding to the rear motor drive can be used as part of the second charging circuit 5, reducing costs by reusing components; at the same time, the layout space reserved for the second high-voltage connector in the battery pack 1 can be used to arrange the charging control components included in the second BDU12, and the second high-voltage connector can also be integrated with the second BDU12, thereby maximizing space utilization. In addition, four-wheel drive electric vehicles may have two-wheel drive versions of the same model, and in order to achieve platformization, the battery pack 1 can be universal. For the two-wheel drive version, see Figure 7 , there is no rear motor drive 8, and it is only necessary not to install the second high-voltage connector corresponding to the rear motor drive 8 on the basis of the battery pack 1, so as to realize the dual-gun charging of the two-wheel drive vehicle. It should be noted that the first end of the first BDU11 and the second BDU12 is the input end in the charging state, that is, the end connected to the charging port, and the second end of the first BDU11 and the second BDU12 is the output end in the charging state, that is, the end connected to the power battery 3; therefore, in Figure 3 In the figure, the left and right ends of the first BDU 11 only indicate the positional relationship, not the first and second ends of the first BDU 11. The first copper busbar and the second copper busbar are both connected to the first end of the first BDU 11 (the input end in the charging state).

[0037] As a specific embodiment of the present invention, see Figure 4 and Figure 5 The first BDU 11 includes a first positive contactor 111 and a first negative contactor 112. The first end of the first positive contactor 111 is electrically connected to the positive line of the first charging circuit 4, the second end of the first positive contactor 111 is electrically connected to the positive electrode of the power battery 13, the first end of the first negative contactor 112 is electrically connected to the negative line of the first charging circuit 4, and the second end of the first negative contactor 112 is electrically connected to the negative electrode of the power battery 13. After the external charging gun is connected to the first charging circuit 4 through the first charging port 2 and it is confirmed that the connection between the two is stable and correct, the first positive contactor 111 and the first negative contactor 112 are controlled to be closed, so that the external power supply can charge the power battery 13 through the first charging circuit 4.

[0038] As a specific embodiment of the present invention, see Figure 5The first BDU 11 includes a first pre-charging unit 113, which is connected in parallel with the first positive contactor 111. When charging using the first charging circuit 4, the first pre-charging unit 113 can be used to perform pre-charging first, and then positive charging can be performed after the pre-charging is completed, so as to avoid the instantaneous high voltage when the external power source starts charging at the moment when the first positive contactor 111 and the first negative contactor 112 are closed, which may cause the power battery 13 to be damaged, thereby extending the service life of the power battery 13.

[0039] Specifically, see Figure 5 , the first pre-charging unit 113 includes a first pre-charging contactor 1131 and a first pre-charging resistor 1132 connected in series. When the external power source is charged through the first charging circuit 4, the first negative contactor 112 and the first pre-charging contactor 1131 are first controlled to be closed, so as to pre-charge the first charging circuit 4, and the first pre-charging resistor 1132 plays a current limiting role to protect the power battery 13; when the pre-charging is completed, the first positive contactor 111 is controlled to be closed, and the first pre-charging contactor 1131 is controlled to be disconnected, so that the first charging circuit 4 can charge the power battery 13 normally.

[0040] As a specific embodiment of the present invention, see Figure 4 and Figure 6 The second BDU 12 includes a second positive contactor 121 and a second negative contactor 122. The first end of the second positive contactor 121 is electrically connected to the positive line of the second charging circuit 5, the second end of the second positive contactor 121 is electrically connected to the first end of the first positive contactor 111, the first end of the second negative contactor 122 is electrically connected to the negative line of the second charging circuit 5, and the second end of the second negative contactor 122 is electrically connected to the first end of the first negative contactor 112. After the external charging gun is connected to the second charging circuit 5 through the second charging port 3 and it is confirmed that the connection between the two is stable and correct, the second positive contactor 121 and the second negative contactor 122 are controlled to be closed, and the first positive contactor 111 and the first negative contactor 112 are confirmed to be in a closed state, so that the external power supply can charge the power battery 13 through the second charging circuit 5.

[0041] As a specific embodiment of the present invention, see Figure 6The second BDU 12 includes a second pre-charging unit 123, which is connected in parallel with the second positive contactor 121. When charging using the second charging circuit 5, the second pre-charging unit 123 can be used to perform pre-charging first, and then positive charging can be performed after the pre-charging is completed, so as to avoid the instantaneous high voltage when the external power source starts charging at the moment when the second positive contactor 121 and the second negative contactor 122 are closed, which may cause the power battery 13 to be damaged, thereby extending the service life of the power battery 13. Specifically, the second pre-charging unit 123 includes a second pre-charging contactor 1231 and a second pre-charging resistor 1232 connected in series. When the first positive contactor 111 and the first negative contactor 112 are in a closed state, when the external power supply is charged through the second charging circuit 5, the second negative contactor 122 and the second pre-charging contactor 1231 are first controlled to be closed, so as to pre-charge the second charging circuit 5, and the second pre-charging resistor 1232 plays a current limiting role to protect the power battery 13; when the pre-charging is completed, the second positive contactor 121 is controlled to be closed, and the second pre-charging contactor 1231 is controlled to be disconnected, so that the second charging circuit 5 can charge the power battery 13 normally.

[0042] It should be noted that the first charging circuit 4 and the second charging circuit 5 are both DC charging circuits for DC charging the power battery 13, and the charging voltage needs to be higher than the rated voltage of the power battery 13 to charge smoothly. However, there are currently a variety of charging voltage specifications for domestic DC charging facilities, so there may be a situation where the charging voltage is lower than the rated voltage of the power battery 13. In order to complete charging even at a low charging voltage, see Figure 4 Preferably, the first charging circuit 4 is provided with a boost circuit 41, the first charging circuit is configured as a boost charging circuit, and the second charging circuit 5 is configured as a DC charging circuit. When the charging voltage of the external DC charging pile is low, it can be connected to the first charging port 2, so that the power battery 3 is charged after being boosted by the boost circuit 41; and when the charging voltage of the external DC charging pile is higher than the higher one, that is, the charging voltage is higher than the rated voltage of the power battery 13, it can be directly connected to the second charging port 3, so as to charge the power battery 3 through the second charging circuit 5; of course, when the charging voltage of the external DC charging pile is higher than the higher one, it can also be connected to the first charging port 1 to charge the power battery 3 through the first charging circuit 4. Specifically, see Figure 4 The boost circuit 41 can use the three-phase winding in the motor winding and the three-phase bridge arm in the motor inverter, and control the charge and discharge of the motor winding by controlling the conduction and closing of each switch tube in the three-phase bridge arm, thereby boosting the voltage.

[0043] Furthermore, in the actual use of electric vehicles, there may be a problem that there is no DC charging pile when charging is needed. In order to be able to perform AC charging, preferably, see Figure 4 , the first charging port 2 is an AC / DC integrated charging port, the second charging port 3 is a DC charging port, the DC interface of the AC / DC integrated charging port is electrically connected to the first charging circuit 4, the AC interface of the AC / DC integrated charging port is electrically connected to the first charging circuit 4 located between the boost circuit 41 and the first end of the first BDU 11 through the AC charging circuit 6, and the AC charging circuit 6 is provided with a vehicle charger 7. The charging gun of the AC charging pile is inserted into the AC interface of the AC / DC integrated charging port, thereby connecting to the AC charging circuit 6, and the vehicle charger 7 converts the AC power input into the DC power required by the power battery 13, and charges the power battery 13 through the first charging circuit 4.

[0044] To ensure power supply quality and charging efficiency, see Figure 4 A filter capacitor 42 is connected between the positive and negative lines of the first charging circuit 4. It should be noted that the filter capacitor 42 will be charged during use. When the power is turned off, there is a voltage between the terminals of the filter capacitor 42. In order to ensure safety, preferably, the filter capacitor 42 is connected in parallel with a sampling discharge resistor 43, which can provide a discharge channel for the filter capacitor 42 to avoid causing safety accidents.

[0045] In addition, it should be noted that the battery pack 1 is provided with a BMS battery management system 14, which is respectively connected to the first charging circuit 4 and the second charging circuit 5, so that the charging current can be monitored, and the relay action in the first BDU 11 and the second BDU 12 can be controlled to monitor the status of the power battery and ensure the safe use of the battery during the charging and discharging process. A battery main fuse 131 is preferably provided in the power battery 13 to further ensure the safety of charging and discharging.

[0046] The battery pack power distribution system of the present invention is provided with a second BDU12 on the basis of the first BDU11 inside the battery pack 1, so that a dual charging circuit can be implemented to charge the power battery 13 of the electric vehicle, thereby improving the charging power and reducing the charging waiting time; in addition, when corresponding to an electric four-wheel drive vehicle, the second copper busbar reserved for power transmission of the corresponding four-wheel drive vehicle can be utilized, so that the second BUD12 can be electrically connected to the first BDU11 for charging through the second copper busbar, and the arrangement space reserved for the corresponding second high-voltage connector can also be used to arrange the charging control components included in the second BDU12, thereby maximizing the space utilization rate and realizing dual-gun charging while meeting the space requirements of the passenger compartment.

[0047] In addition, the present invention also provides an electric vehicle, see Fig. 9 The electric vehicle 100 includes the battery pack power distribution system 200 provided by the present invention, and therefore has all its beneficial effects, which will not be repeated here.

[0048] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0050] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A battery pack power distribution system, characterized in that: The invention comprises a battery pack (1), wherein the battery pack (1) comprises a first BDU (11), a second BDU (12) and a power battery (13), wherein a first end of the first BDU (11) is electrically connected to a first charging port (2) via a first charging circuit (4), and a second end of the first BDU (11) is electrically connected to the power battery (13), a first end of the second BDU (12) is electrically connected to a second charging port (3) via a second charging circuit (5), and a second end of the second BDU (12) is electrically connected to the power battery (13).

2. The battery pack power distribution system according to claim 1, characterized in that: The second end of the second BDU (12) is electrically connected to the first end of the first BDU (11).

3. The battery pack power distribution system according to claim 2, characterized in that: The first BDU (11) comprises a first positive contactor (111) and a first negative contactor (112); a first end of the first positive contactor (111) is electrically connected to a positive line of the first charging circuit (4); a second end of the first positive contactor (111) is electrically connected to a positive electrode of the power battery (13); a first end of the first negative contactor (112) is electrically connected to a negative line of the first charging circuit (4); and a second end of the first negative contactor (112) is electrically connected to a negative electrode of the power battery (13).

4. The battery pack power distribution system according to claim 3, characterized in that: The first BDU (11) comprises a first pre-charging unit (113), and the first pre-charging unit (113) is connected in parallel with the first positive contactor (111).

5. The battery pack power distribution system according to claim 3, characterized in that: The second BDU (12) comprises a second positive contactor (121) and a second negative contactor (122); a first end of the second positive contactor (121) is electrically connected to the positive line of the second charging circuit (5); a second end of the second positive contactor (121) is electrically connected to the first end of the first positive contactor (111); a first end of the second negative contactor (122) is electrically connected to the negative line of the second charging circuit (5); and a second end of the second negative contactor (122) is electrically connected to the first end of the first negative contactor (112).

6. The battery pack power distribution system according to claim 5, characterized in that: The second BDU (12) comprises a second pre-charging unit (123), and the second pre-charging unit (123) is connected in parallel with the second positive contactor (121).

7. The battery pack power distribution system according to any one of claims 2 to 6, characterized in that: The battery pack (1) is provided with a first copper busbar for transmitting electric energy from the first BDU (11) to a first high-voltage connector and a second copper busbar for transmitting electric energy from the first BDU (11) to a second high-voltage connector, the first high-voltage connector being electrically connected to a first motor drive, the second high-voltage connector being electrically connected to a second motor drive, the first BDU (11) being arranged in a space corresponding to the first high-voltage connector in the battery pack (1), the second BDU (12) being arranged in a space corresponding to the second high-voltage connector in the battery pack (1), the second end of the second BDU (12) being electrically connected to the first end of the first BDU (11) via the second copper busbar; The first motor drive is one of a front motor drive and a rear motor drive, and the second motor drive is another one.

8. The battery pack power distribution system according to any one of claims 2 to 6, characterized in that: The first charging circuit (4) is provided with a boost circuit (41), the first charging circuit is configured as a boost charging circuit, and the second charging circuit (5) is configured as a DC charging circuit.

9. The battery pack power distribution system according to claim 8, characterized in that: The first charging port (2) is an AC / DC integrated charging port, the second charging port (3) is a DC charging port, the DC interface of the AC / DC integrated charging port is electrically connected to the first charging circuit (4), the AC interface of the AC / DC integrated charging port is electrically connected to a first end of an AC charging circuit (6), the second end of the AC charging circuit (6) is electrically connected to a portion of the first charging circuit (4) located between the boost circuit (41) and the first end of the first BDU (11), and the AC charging circuit (6) is provided with an on-board charger (7).

10. An electric vehicle, characterized in that: A battery pack power distribution system comprising the battery pack power distribution system described in any one of claims 1 to 9.

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