Single-charging and single-discharging standard PDU structure for battery system

Abstract

The utility model discloses a single-charging and single-discharging standard PDU structure for a battery system. The single-charging and single-discharging standard PDU structure comprises a shell box, and a battery positive electrode connector, a battery negative electrode connector, a charging and discharging module and a control module which are arranged on the shell box, and the charging and discharging module can realize the charging and discharging effects of the battery pack under the control of the control module. The charging and discharging module comprises a charging assembly and a discharging assembly. The two ends of the charging assembly and the two ends of the discharging assembly are connected with the battery positive electrode connector and the battery negative electrode connector respectively. The four mounting feet are mounted on the periphery of the box main body, so that a standard PDU structure is detachable, a battery system can get rid of the integrated design of an electric appliance mounting plate in a battery pack, the design space is saved, the cost is reduced, and the design of parts of the battery system is universalized.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicle power distribution, and in particular relates to a single-charge and single-release standard PDU structure for a battery system. Background Art

[0002] There is a component in electric vehicles called a high-voltage and high-current distribution unit (PDU for short). Its main function is to electrically connect high-voltage components through busbars and wiring harnesses, providing charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions for the high-voltage system of new energy vehicles.

[0003] Currently, in the power distribution system, PDU products are mostly designed in a planar manner, that is, the power interface, functional devices, connectors and other components are distributed on a plane, and the corresponding functions are realized by connecting the lines, and finally packaged. From the overall structural point of view, the components in the PDU product are located on the same side of the box. When the PDU product needs to achieve multi-functional connection or there are many product components, the installation area of ​​the components will often be greatly increased, which will directly lead to the increase in volume, weight and cost of the PDU product, which will have an adverse effect on the manufacturing, use and maintenance of the product. In addition, as the volume of the product increases, the stability of the product under vibration conditions is poor, which reduces the reliability of the product.

[0004] Furthermore, the numerous wires connecting the circuit boards within the PDU result in tangled wiring, hindering modular production. During PDU operation, moisture from the air inside the cabinet, water from the outside, and pressure changes caused by heat from internal electrical components all pose safety risks. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a single-charge and single-release standard PDU structure for a battery system, so as to solve the technical problems of complex structure and inconvenient disassembly in the PDU.

[0006] In order to achieve the above purpose, the specific technical solutions of the present utility model are as follows:

[0007] A single-charge, single-discharge standard PDU structure for a battery system includes an outer shell box, a battery positive terminal, a battery negative terminal, a charge and discharge module, and a control module mounted on the outer shell box; the charge and discharge module can realize the charge and discharge effect of the battery pack under the control of the control module.

[0008] The charge-discharge module includes a charging assembly and a discharging assembly. The charging assembly includes a positive charging connector, a charging relay, and a negative charging connector connected in series. The discharging assembly includes a positive discharge connector, a discharge relay, and a negative discharge connector connected in series. The charging relay and the discharge relay are both connected to the positive connector of the battery. The negative charging connector and the negative discharge connector are both connected to the negative connector of the battery.

[0009] Furthermore, the charging and discharging module further comprises a shunt. The charging negative terminal and the discharging negative terminal are both connected to one end of the shunt, and the other end of the shunt is connected to the battery negative terminal.

[0010] Furthermore, the control module includes a PDU control board, a BMS all-in-one machine and a 4G module. The PDU control board, the BMS all-in-one machine and the 4G module are all fixed in the inner cavity of the box body through a circuit mounting plate.

[0011] Furthermore, a bracket matching the circuit mounting plate is welded and fixed on the inner wall of the box body. The circuit mounting plate is fixed to the bracket by bolts.

[0012] Furthermore, the negative charging connector, negative discharging connector, and positive battery connector all use the FPL29021801PW from Huzheng. The charging relay uses the Hongfa HFE82V-250C-12-H-C5-1 relay-250A; the discharging relay uses the Hongfa HFE82V-400M / 750-12-H-C5-1 (901) contactor-400A.

[0013] Furthermore, the shunt adopts Nishizaki FL-2 600A / 75mV.

[0014] Furthermore, the upper cover is provided with downward flanges on the four edges thereof, and the flanges cover the top edge of the box body.

[0015] Furthermore, a moisture-absorbing sheet is provided on the inner side surface of the upper cover.

[0016] Furthermore, the box body is provided with an M12 explosion-proof valve.

[0017] Furthermore, four mounting feet are provided around the box body.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. This utility model realizes the detachable structure of the standard PDU by installing four mounting feet around the box body, so that the battery system can get rid of the integrated design of the electrical installation board in the battery pack, saving design space, reducing costs, and making the design of battery system components universal.

[0020] 2. In this utility model, the PDU control board, BMS all-in-one, and 4G module are all secured within the inner cavity of the box body via a wiring mounting plate. The wiring mounting plate is vertically layered with the charging and discharging relays. This reduces the number of components mounted on the bottom surface of the box body, thereby reducing the space occupied by the device within the battery system, while also providing space for routing the charging and discharging relays.

[0021] 3. This utility model utilizes an outer shell box structured as a main body with an open top and a top cover fixed to the top of the main body. The top cover is provided with downwardly angled flanges around its edges; these flanges wrap around the top edge of the main body, effectively waterproofing the components within. A moisture-absorbing sheet is provided on the inner side of the top cover to absorb moisture from the main body. Furthermore, an M12 explosion-proof valve is installed on the main body to effectively reduce the pressure difference between the interior of the main body and the outside world. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 Schematic diagram of the relative positions of the control module and the charge and discharge module in the present utility model;

[0024] Figure 3 It is a structural schematic diagram of the discharge component in the utility model.

[0025] Figure markings: 1. Outer casing; 1-1. Box body; 1-2. Upper cover; 2. Battery positive connector; 3. Battery negative connector; 4. Charge and discharge module; 4-1. Charging positive connector; 4-2. Charging relay; 4-3. Charging negative connector; 4-4. Discharge positive connector; 4-5. Discharge relay; 4-6. Discharge negative connector; 5. Control module; 5-1. PDU control board; 5-2. BMS all-in-one machine; 6. Shunt; 7. M12 explosion-proof valve; 8. Mounting foot. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1 and 2 As shown, a single-charge and single-discharge standard PDU structure for a battery system includes an outer shell box 1, a battery positive terminal 2, a battery negative terminal 3, a charge and discharge module 4, and a control module 5. The outer shell box 1 is divided into a box body 1-1 and an upper cover 1-2. Among them, the box body 1-1 is a box structure with an open top. The upper cover 1-2 is fixed on the top of the box body 1-1. The battery positive terminal 2 and the battery negative terminal 3 are both installed on the box body 1-1 and can be connected to the battery pack through a wire. The charge and discharge module 4 is installed in the box body 1-1 and is connected to the battery positive terminal 2 and the battery negative terminal 3. It can realize the charging and discharging effect of the battery pack under the control of the control module 5.

[0029] like Figure 2 and 3 As shown, the charge-discharge module 4 includes a shunt 6, as well as a charging assembly and a discharging assembly connected in parallel. The charging assembly includes a charging positive terminal 4-1, a charging relay 4-2, and a charging negative terminal 4-3 connected in series. The discharging assembly includes a discharging positive terminal 4-4, a discharging relay 4-5, and a discharging negative terminal 4-6 connected in series. The charging relay 4-2 and the discharging relay 4-5 are both connected to the battery positive terminal 2. The charging negative terminal 4-3 and the discharging negative terminal 4-6 are both connected to one end of the shunt 6, and the other end of the shunt 6 is connected to the battery negative terminal 3.

[0030] like Figure 2 As shown, the control module 5 includes a PDU control board 5-1, a BMS (battery management system) 5-2, and a 4G module. The PDU control board 5-1, BMS 5-2, and 4G module are secured within the interior of the box body 1-1 via a wiring mounting plate. The wiring mounting plate is vertically layered with the charging relay 4-2 and the discharging relay 4-5. This reduces the number of components mounted on the bottom surface of the box body 1-1, thereby reducing the space occupied by the device within the battery system, while also providing space for routing the charging relay 4-2 and the discharging relay 4-5.

[0031] Specifically, a bracket that matches the circuit mounting plate is welded to the inner wall of the box body 1-1. The circuit mounting plate is fixed to the bracket with six M5*12 bolts, ensuring the structural strength of the circuit mounting plate while preventing deformation and loosening due to vibration.

[0032] In this embodiment, the charging negative electrode connector, the discharging negative electrode connector and the battery positive electrode connector 2 are all made of FPL29021801PW.

[0033] Charging relay 4-2 is a Hongfa HFE82V-250C-12-H-C5-1 relay-250A; discharging relay 4-5 is a Hongfa HFE82V-400M / 750-12-H-C5-1 (901) contactor-400A, enabling the device to carry a 200A charging current and a 300A discharging current. Shunt 6 uses the Nishizaki FL-2 600A / 75mV, allowing the device to meet UN38.3 requirements while meeting the current requirements.

[0034] In the present invention, each component in the charging assembly and the discharging assembly is connected using a 30mm*4mm aluminum busbar, which can ensure the overflow size while saving the cost of the device.

[0035] In this embodiment, the upper cover 1-2 is provided with downwardly angled flanges around its edges. These flanges wrap around the top edge of the box body 1-1 to prevent water from entering the box body 1-1 and causing a short circuit. A moisture-absorbing sheet is attached to the inner side of the upper cover 1-2 to absorb moisture from the air inside the box body 1-1.

[0036] Furthermore, an M12 explosion-proof valve 7 is provided on the box body 1-1 to ensure the stability of the pressure difference between the inside of the box body 1-1 and the outside.

[0037] Furthermore, four mounting feet 8 are provided around the box body 1 - 1 to meet multiple installation conditions for the battery pack.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-charge single-release standard PDU structure for a battery system, comprising an outer shell box (1), characterized in that: It also includes a battery positive terminal (2), a battery negative terminal (3), a charge and discharge module (4), and a control module (5) installed on the outer shell box (1); the charge and discharge module (4) can achieve the charge and discharge effect of the battery pack under the control of the control module (5); The charging and discharging module (4) comprises a charging component and a discharging component; the charging component comprises a charging positive electrode connector (4-1), a charging relay (4-2) and a charging negative electrode connector (4-3) connected in series in sequence; the discharging component comprises a discharging positive electrode connector (4-4), a discharging relay (4-5) and a discharging negative electrode connector (4-6) connected in series in sequence; the charging relay (4-2) and the discharging relay (4-5) are both connected to the battery positive electrode connector (2); the charging negative electrode connector (4-3) and the discharging negative electrode connector (4-6) are both connected to the battery negative electrode connector (3).

2. A single-charge single-release standard PDU structure for a battery system according to claim 1, characterized in that: The charging and discharging module (4) further comprises a shunt (6); the charging negative electrode connector (4-3) and the discharging negative electrode connector (4-6) are both connected to one end of the shunt (6), and the other end of the shunt (6) is connected to the battery negative electrode connector (3).

3. The single-charge single-release standard PDU structure for a battery system according to claim 1, characterized in that: The control module (5) includes a PDU control panel (5-1), a BMS all-in-one machine (5-2), and a 4G module; the PDU control panel (5-1), the BMS all-in-one machine (5-2), and the 4G module are all fixed in the inner cavity of the outer shell box (1) via a circuit mounting plate; the circuit mounting plate, the charging relay (4-2), and the discharging relay (4-5) are arranged in layers in a vertical direction.

4. A single-charge single-release standard PDU structure for a battery system according to claim 3, characterized in that: A bracket matching the circuit mounting plate is welded and fixed on the inner wall of the outer shell box (1); the circuit mounting plate is fixed to the bracket by bolts.

5. The single-charge single-release standard PDU structure for a battery system according to claim 1, characterized in that: The charging negative electrode connector, the discharging negative electrode connector and the battery positive electrode connector (2) all adopt the Huzheng FPL29021801PW; the charging relay (4-2) adopts the Hongfa HFE82V-250C-12-H-C5-1 relay-250A; and the discharging relay (4-5) adopts the Hongfa HFE82V-400M / 750-12-H-C5-1 (901) contactor-400A.

6. The single-charge, single-discharge standard PDU structure for a battery system according to claim 2, characterized in that: The shunt (6) is a Nishizaki FL-2 600A / 75mV.

7. The single-charge single-release standard PDU structure for a battery system according to claim 1, characterized in that: The outer shell box (1) is divided into a box body (1-1) and an upper cover (1-2); the box body (1-1) is a box structure with an open top; and the upper cover (1-2) is fixed to the top of the box body (1-1).

8. The single-charge single-release standard PDU structure for a battery system according to claim 7, characterized in that: The upper cover (1-2) is provided with downward flanges at the four edges thereof; the flanges cover the top edge of the box body (1-1); and a moisture-absorbing sheet is provided on the inner side surface of the upper cover (1-2).

9. The single-charge single-release standard PDU structure for a battery system according to claim 7, characterized in that: The box body (1-1) is provided with an M12 explosion-proof valve (7).

10. The single-charge single-release standard PDU structure for a battery system according to claim 7, characterized in that: Four mounting feet (8) are provided around the box body (1-1).

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