Relay water cooling structure and battery cut-off unit

Abstract

The utility model provides a relay water cooling structure and battery cut-off unit relates to battery cut-off unit technical field, this relay water cooling structure includes liquid cooling board, conducting group and relay, conducting group sets up on liquid cooling board, and conducting group includes interval first conducting part and second conducting part, and first conducting part and second conducting part all are contacted with liquid cooling board and cooperate, and relay has power terminal group, and power terminal group includes first power terminal and second power terminal, and first power terminal contacts with first conducting part and cooperates, and second power terminal contacts with second conducting part and cooperates. When the relay generates excessive heat, can directly through liquid cooling board and carry out rapid cooling, will not exceed the long -term tolerance temperature of relay shell, prolongs the service life, effectively solved because of the burn -off or welding phenomenon that the temperature of the lap joint is too high, makes the main circuit virtual connection or circuit breaking, leads to the problem of the instantaneous power failure or the fire of the vehicle.

Description

Technical Field

[0001] This utility model relates to the field of battery disconnection unit technology, and in particular to a relay water-cooling structure and a battery disconnection unit. Background Technology

[0002] The Battery Energy Distribution Unit (BDU) is a crucial component in the high-voltage circuit of new energy vehicles; it can also be called a battery energy distribution module or high-voltage box. The BDU module controls the power-on / off, pre-charge, and charging processes in the high-voltage electrical circuit. Whether the characteristic parameters of the BDU product meet the qualification requirements has a significant impact on the vehicle's lifespan, control strategy, and high-voltage electrical safety.

[0003] For example, patent CN223125159U discloses a BDU structure inside a battery box, including a base. A main positive relay and a main negative relay are disposed at the upper end of the base. Each main positive relay and main negative relay has a first adapter copper busbar. Several protruding structures are formed on the base, each with a limiting post. The first adapter copper busbar is installed on the protruding structure and limited by the limiting posts. By setting the limiting posts on the protruding structures, the adapter copper busbar is limited in position. When the adapter copper busbar is installed with bolts, it will not rotate with the bolts, facilitating quick installation or removal of the adapter copper busbar.

[0004] However, BDU electrical components are prone to high-temperature damage when the battery generates electricity at high rates. In the overcurrent temperature rise test of BDU under different torques, the instantaneous temperature at the connection between the main positive relay and the main negative relay and the copper busbar is relatively high, far exceeding the long-term tolerance temperature of the relay shell. This can easily lead to burning or welding at the connection, resulting in a loose connection or open circuit in the main circuit, causing the vehicle to lose power or catch fire instantly. Utility Model Content

[0005] In view of this, the present invention proposes a relay water-cooling structure and a battery cut-off unit, which can solve the problem that existing devices are prone to causing the main circuit to be loosely connected or open during use, resulting in instantaneous power loss or fire in the vehicle.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a relay water-cooling structure, including: Liquid cooling plate; A conductive assembly, disposed on the liquid cooling plate, comprises a first conductive portion and a second conductive portion spaced apart, both of which are in contact with the liquid cooling plate; and A relay has a power terminal group, the power terminal group including a first power terminal and a second power terminal, the first power terminal being in contact with a first conductive part, and the second power terminal being in contact with a second conductive part.

[0007] Based on the above technical solutions, preferably, the liquid cooling plate includes: A liquid-cooled plate having a liquid inlet and a liquid outlet, wherein the conductive assembly and the relay are both mounted on the liquid-cooled plate; and A flow channel plate is provided on which a cooling flow channel is formed. The liquid cooling plate is placed on the flow channel plate and seals the cooling flow channel. The liquid inlet and the liquid outlet are both connected to the cooling flow channel.

[0008] More preferably, the liquid inlet and the liquid outlet are spaced apart along the width direction of the flow channel plate, and the cooling flow channel includes at least one liquid inlet flow channel and at least one liquid outlet flow channel. Both the liquid inlet flow channel and the liquid outlet flow channel extend along the length direction of the flow channel plate, and each of the liquid inlet flow channels and each of the liquid outlet flow channels are spaced apart along the width direction of the flow channel plate. One end of the liquid inlet channel is connected to the liquid inlet, one end of the liquid outlet channel is connected to the liquid outlet, and the other end of the liquid inlet channel is connected to the other end of the liquid outlet channel.

[0009] Based on the above technical solutions, preferably, the liquid cooling plate has multiple mounting points spaced apart on its periphery, and each mounting point is formed by stamping.

[0010] Based on the above technical solutions, preferably, a connection hole is provided through the liquid cooling plate, and a locking member is provided on the connection hole. The locking member passes through the conductive group and is detachably connected to the relay.

[0011] This utility model also provides a battery disconnection unit, including the relay water-cooling structure described above.

[0012] Based on the above technical solution, preferably, the relay has two relays, namely a main positive relay and a main negative relay, and the main positive relay and the main negative relay are disposed alternately on the liquid cooling plate; The conductive group is provided in two parts, namely a first conductive group and a second conductive group. The first conductive group is used to contact and cooperate with the main positive relay, and the second conductive group is used to contact and cooperate with the main negative relay.

[0013] Based on the above technical solutions, preferably, a fuse is also included. The two ends of the fuse are disposed on the liquid cooling plate through two first insulating pillars. The fuse is connected to the main positive relay through the first conductive group to form a positive circuit.

[0014] Based on the above technical solutions, preferably, it also includes a shunt, the two ends of which are disposed on the liquid cooling plate through two second insulating pillars, and the shunt is connected to the main negative relay through the second conductive group to form a negative circuit.

[0015] Based on the above technical solutions, preferably, a pre-charge resistor and a pre-charge relay are also disposed on the liquid cooling plate. The pre-charge resistor and the pre-charge relay are electrically connected in series, and the pre-charge resistor and the pre-charge relay are electrically connected in parallel with the main positive relay to form a pre-charge circuit.

[0016] The relay water-cooling structure and battery disconnection unit of this utility model have the following advantages over the prior art: (1) By placing the conductive group on the liquid cooling plate and attaching the power terminal group to the conductive group, when the relay heats up too much, it can be cooled down quickly through the liquid cooling plate, which can ensure that it will not exceed the long-term tolerance temperature of the relay shell, thus extending the service life of the relay. It effectively solves the problem of burning or welding caused by excessive temperature at the joint, resulting in a loose connection or open circuit in the main circuit, causing the vehicle to lose power or catch fire instantly. (2) The mounting point is formed by stamping process. The mounting point has high structural strength. While completing the forming, the reinforcing rib is also processed. It can be used as the mounting position of the relay water cooling structure, or as the reinforcing rib of the liquid cooling plate to improve the structural strength. It can also be used as the fixed interface of the whole vehicle or battery cut-off unit, thereby reducing additional bracket parts and reducing the total cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the relay water-cooling structure of this utility model; Figure 2 This is a schematic diagram of the liquid cooling plate in the relay water-cooling structure of this utility model; Figure 3 for Figure 2 Side view; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 This is a schematic diagram of the overall structure of the battery disconnection unit of this utility model; Figure 6 This is a schematic diagram of the structure of the battery disconnection unit of this utility model, which illustrates the first conductive group. Figure 7 This is a schematic diagram of the structure of the main positive power terminal group in the battery disconnection unit of this utility model; Figure 8 This is a schematic diagram illustrating the structure of the second conductive group in the battery disconnection unit of this utility model; Figure 9 This is a schematic diagram of the structure of the main negative power terminal group in the battery disconnection unit of this utility model.

[0019] Figure label: 1. Liquid cooling plate; 101. Liquid cooling plate; 102. Flow channel plate; 103. Liquid inlet; 104. Liquid outlet; 105. Cooling flow channel; 1051. Liquid inlet flow channel; 1052. Liquid outlet flow channel; 106. Mounting point; 107. Connecting hole; 2. Conductive assembly; 21. First conductive part; 22. Second conductive part; 23. First conductive assembly; 231. First copper busbar; 232. Second copper busbar; 24. Second conductive assembly; 241. Fourth copper busbar; 242. Fifth copper busbar; 3. Relay; 31. Power terminal Subgroup; 311, First power terminal; 312, Second power terminal; 32, Main positive relay; 321, Main positive power terminal group; 3211, Main positive first terminal; 3212, Main positive second terminal; 33, Main negative relay; 331, Main negative power terminal group; 3311, Main negative first terminal; 3312, Main negative second terminal; 4, Fuse; 5, First insulating post; 6, Shunt; 7, Second insulating post; 8, Precharge resistor; 9, Precharge relay; 10, Third copper busbar; 11, Sixth copper busbar. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0021] like Figures 1 to 4As shown, this utility model provides a relay water-cooling structure, which includes a liquid cooling plate 1, a conductive group 2, and a relay 3. The conductive group 2 is disposed on the liquid cooling plate 1 and includes a first conductive part 21 and a second conductive part 22 disposed at intervals. Both the first conductive part 21 and the second conductive part 22 are in contact with the liquid cooling plate 1. The relay 3 has a power terminal group 31, which includes a first power terminal 311 and a second power terminal 312. The first power terminal 311 is in contact with the first conductive part 21, and the second power terminal 312 is in contact with the second conductive part 22.

[0022] By placing the conductive group 2 on the liquid cooling plate 1 and attaching the power terminal group 31 to the conductive group 2, when the relay 3 overheats, it can be quickly cooled down directly through the liquid cooling plate 1, ensuring that the temperature does not exceed the long-term tolerance temperature of the relay 3 housing, thus extending the service life of the relay 3. This effectively solves the problem of burning or welding caused by excessively high temperature at the joint, which leads to loose or open circuits in the main circuit, resulting in instantaneous power loss or fire in the vehicle.

[0023] The conductive group 2 is used to realize the electrical connection of the relay 3. The conductive group 2 can be made of copper busbar, aluminum busbar or copper-clad aluminum busbar, etc.

[0024] In some embodiments, the liquid cooling plate 1 includes a liquid cooling plate 101 and a flow channel plate 102. The liquid cooling plate 101 has an inlet 103 and an outlet 104. The conductive assembly 2 and the relay 3 are both disposed on the liquid cooling plate 101. The flow channel plate 102 has a cooling flow channel 105. The liquid cooling plate 101 covers the flow channel plate 102 and seals the cooling flow channel 105. The inlet 103 and the outlet 104 are both connected to the cooling flow channel 105. The sealed connection between the liquid cooling plate 101 and the flow channel plate 102 ensures the smooth flow of coolant in the cooling flow channel 105, effectively preventing coolant leakage, ensuring cooling effect, and also ensuring safety. The liquid cooling plate 101 and the flow channel plate 102 can be connected by a sealing ring or by brazing.

[0025] Furthermore, by placing both the conductive group 2 and the relay 3 on the liquid-cooled plate 101, any damaged relay 3 in the relay water-cooling structure can be directly replaced, greatly reducing the maintenance cost of the relay water-cooling structure.

[0026] In some embodiments, the liquid inlet 103 and the liquid outlet 104 are spaced apart along the width direction of the flow channel plate 102. The cooling flow channel 105 includes at least one liquid inlet flow channel 1051 and at least one liquid outlet flow channel 1052. Both the liquid inlet flow channel 1051 and the liquid outlet flow channel 1052 extend along the length direction of the flow channel plate 102, and each of the liquid inlet flow channels 1051 and each of the liquid outlet flow channels 1052 is spaced apart along the width direction of the flow channel plate 102. One end of the liquid inlet flow channel 1051 is connected to the liquid inlet 103, one end of the liquid outlet flow channel 1052 is connected to the liquid outlet 104, and the other end of the liquid inlet flow channel 1051 and the other end of the liquid outlet flow channel 1052 are connected. The temperature of the cooling flow channel 105 can be conducted to the electrical components through metal and air, reducing the operating temperature of electrical components such as the relay 3 in the relay water-cooled structure, thereby improving the service life of the electrical components. The cooling channel 105 is U-shaped, which effectively extends the cooling path, ensures the cooling effect on the electrical components of the relay water-cooled structure, and improves heat dissipation efficiency.

[0027] like Figures 1 to 4 As shown, in some embodiments, the liquid cooling plate 1 has multiple mounting points 106 spaced apart on its periphery, each mounting point 106 being formed by stamping. By using a stamping process to form the mounting points 106, the forming process is completed while the reinforcing ribs are also processed. The mounting points 106 have high structural strength, and they can serve as mounting positions for relay water-cooling structures, as reinforcing ribs for the liquid cooling plate 1 to improve structural strength, and can also be directly used as fixing interfaces for the vehicle or battery disconnection unit, thereby reducing additional bracket parts and lowering the overall cost.

[0028] In some embodiments, a connecting hole 107 is provided through the liquid cooling plate 1, and a locking member is provided on the connecting hole 107. The locking member passes through the conductive assembly 2 and is detachably connected to the relay 3. The locking member can be a bolt or screw, etc., and is threaded through the conductive assembly 2 to the relay 3, thereby stably assembling the relay 3 on the liquid cooling plate 1 and ensuring the reliability of the position of the relay 3.

[0029] In summary, this application provides a water-cooled relay structure. By placing the conductive group 2 on the liquid cooling plate 1 and attaching the power terminal group 31 to the conductive group 2, when the relay 3 overheats, it can be rapidly cooled directly through the liquid cooling plate 1, ensuring that the temperature does not exceed the long-term tolerance temperature of the relay 3 shell, thus extending the service life of the relay 3. This effectively solves the problem of burning or welding caused by excessively high temperatures at the joints, which can lead to loose connections or open circuits in the main circuit, resulting in instantaneous power loss or fire in the vehicle.

[0030] like Figures 1 to 9As shown, this utility model also provides a battery disconnection unit, including the relay water-cooling structure described above.

[0031] In some embodiments, there are two relays 3, namely a main positive relay 32 and a main negative relay 33, which are disposed at intervals on the liquid cooling plate 1; there are two conductive groups 2, namely a first conductive group 23 and a second conductive group 24, the first conductive group 23 is used to contact and cooperate with the main positive relay 32, and the second conductive group 24 is used to contact and cooperate with the main negative relay 33.

[0032] In this configuration, the power terminal group 31 of the main positive relay 32 is the main positive power terminal group 321, the first power terminal 311 of the main positive power terminal group 321 is the main positive first terminal 3211, and the second power terminal 312 of the main positive power terminal group 321 is the main positive second terminal 3212. Similarly, the power terminal group 31 of the main negative relay 33 is the main negative power terminal group 331, the first power terminal 311 of the main negative power terminal group 331 is the main negative first terminal 3311, and the second power terminal 312 of the main negative power terminal group 331 is the main negative second terminal 3312. The first conductive part 21 of the first conductive group 23 is the first copper busbar 231, the second conductive part 22 of the first conductive group 23 is the second copper busbar 232, the first conductive part 21 of the second conductive group 24 is the fourth copper busbar 241, and the second conductive part 22 of the second conductive group 24 is the fifth copper busbar 242.

[0033] One end of the first copper busbar 231 is disposed on the liquid cooling plate 1 and contacts the main positive first terminal 3211. The other end of the first copper busbar 231 is used to connect to an external positive interface. One end of the second copper busbar 232 is disposed on the liquid cooling plate 1 and contacts the main positive second terminal 3212. The main positive relay 32 is placed upside down on the liquid cooling plate 1. The ends of the first copper busbar 231 and the second copper busbar 232 are disposed below the main positive relay 32 and attached to the liquid cooling plate 1. While realizing electrical connection, it can also ensure that the liquid cooling plate 1 cools the connection between the main positive relay 32 and the first conductive group 23, thereby avoiding the burning or welding phenomenon at the connection due to high temperature and ensuring safety.

[0034] The battery disconnection unit also includes a fuse 4. The two ends of the fuse 4 are mounted on the liquid cooling plate 1 via two first insulating posts 5. The fuse 4 is connected to the main positive relay 32 via the first conductive group 23 to form a positive circuit. One end of the fuse 4 is connected to the second copper busbar 232, and the other end is connected to a third copper busbar 10. The other end of the third copper busbar 10 is used to connect to the positive terminal of the battery module. The fuse 4 is suspended and fixed on the liquid cooling plate 1 via the two first insulating posts 5. The first insulating posts 5 provide thermal blocking and electrical isolation, effectively preventing heat from the fuse 4 from flowing back to the liquid cooling plate 1, thus avoiding thermal interference to adjacent components and improving overall thermal stability.

[0035] One end of the fourth copper busbar 241 is disposed on the liquid cooling plate 1 and is in contact with the first main negative terminal 3311. The other end of the fourth copper busbar 241 is used to connect to the negative terminal of the battery module. One end of the fifth copper busbar 242 is disposed on the liquid cooling plate 1 and is in contact with the second main negative terminal 3312. The main negative relay 33 is placed upside down on the liquid cooling plate 1. The ends of the fourth copper busbar 241 and the fifth copper busbar 242 are disposed below the main negative relay 33 and are attached to the liquid cooling plate 1. While realizing electrical connection, it can also ensure that the liquid cooling plate 1 cools the connection between the main negative relay 33 and the second conductive group 24, thereby avoiding the burning or welding phenomenon at the connection due to high temperature and ensuring safety.

[0036] The battery disconnection unit also includes a shunt 6, whose two ends are mounted on the liquid-cooled plate 1 via two second insulating posts 7. The shunt 6 is connected to the main negative relay 33 via the second conductive group 24 to form a negative electrode circuit. One end of the shunt 6 is connected to the fifth copper busbar 242, and the other end of the shunt 6 is connected to a sixth copper busbar 11, the other end of which is used to connect to an external negative electrode interface. The shunt 6 is suspended and fixed on the liquid-cooled plate 1 via the two second insulating posts 7. The connection between the shunt 6 and the fifth copper busbar 242 enables real-time detection of the current value of the negative electrode circuit, thereby ensuring the reliability of its data detection.

[0037] In some embodiments, the battery disconnection unit further includes a pre-charge resistor 8 and a pre-charge relay 9 disposed on the liquid cooling plate 1. The pre-charge resistor 8 and the pre-charge relay 9 are electrically connected in series, and the pre-charge resistor 8 and the pre-charge relay 9 are electrically connected in parallel with the main positive relay 32 to form a pre-charge circuit. By connecting the series branch of the pre-charge relay 9 and the pre-charge resistor 8 in parallel across the main positive relay 32, the initial current is limited to a controllable range, preventing the relay 3 contacts from welding and ensuring reliable disconnection of the main positive relay 32.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A relay water-cooling structure, characterized in that, include: Liquid cooling plate (1); A conductive assembly (2) is disposed on the liquid cooling plate (1). The conductive assembly (2) includes a first conductive part (21) and a second conductive part (22) spaced apart. Both the first conductive part (21) and the second conductive part (22) are in contact with the liquid cooling plate (1). The relay (3) has a power terminal group (31) including a first power terminal (311) and a second power terminal (312). The first power terminal (311) is in contact with the first conductive part (21), and the second power terminal (312) is in contact with the second conductive part (22).

2. The relay water-cooling structure as described in claim 1, characterized in that: The liquid cooling plate (1) includes: A liquid-cooled plate (101) has a liquid inlet (103) and a liquid outlet (104) on it. The conductive assembly (2) and the relay (3) are both disposed on the liquid-cooled plate (101). A flow channel plate (102) is provided with a cooling flow channel (105). The liquid cooling plate (101) is placed on the flow channel plate (102) and seals the cooling flow channel (105). The liquid inlet (103) and the liquid outlet (104) are both connected to the cooling flow channel (105).

3. The relay water-cooling structure as described in claim 2, characterized in that: The liquid inlet (103) and the liquid outlet (104) are spaced apart along the width direction of the flow channel plate (102). The cooling flow channel (105) includes at least one liquid inlet flow channel (1051) and at least one liquid outlet flow channel (1052). The liquid inlet flow channel (1051) and the liquid outlet flow channel (1052) both extend along the length direction of the flow channel plate (102), and each of the liquid inlet flow channels (1051) and each of the liquid outlet flow channels (1052) are spaced apart along the width direction of the flow channel plate (102). One end of the inlet channel (1051) is connected to the inlet port (103), one end of the outlet channel (1052) is connected to the outlet port (104), and the other end of the inlet channel (1051) is connected to the other end of the outlet channel (1052).

4. The relay water-cooling structure as described in claim 1, characterized in that: The liquid cooling plate (1) has multiple mounting points (106) spaced apart on its periphery, and each mounting point (106) is formed by stamping.

5. The relay water-cooling structure as described in claim 1, characterized in that: A connection hole (107) is provided through the liquid cooling plate (1), and a locking member is provided on the connection hole (107). The locking member passes through the conductive group (2) and is detachably connected to the relay (3).

6. A battery disconnection unit, characterized in that: Includes the relay water-cooling structure as described in any one of claims 1 to 5.

7. The battery disconnection unit as described in claim 6, characterized in that: The relay (3) has two, namely a main positive relay (32) and a main negative relay (33), which are disposed on the liquid cooling plate (1) at intervals; There are two conductive groups (2), namely a first conductive group (23) and a second conductive group (24). The first conductive group (23) is used to contact and cooperate with the main positive relay (32), and the second conductive group (24) is used to contact and cooperate with the main negative relay (33).

8. The battery disconnection unit as described in claim 7, characterized in that: It also includes a fuse (4), the two ends of which are mounted on the liquid cooling plate (1) through two first insulating pillars (5). The fuse (4) is connected to the main positive relay (32) through the first conductive group (23) to form a positive circuit.

9. The battery disconnection unit as described in claim 7, characterized in that: It also includes a shunt (6), the two ends of which are mounted on the liquid cooling plate (1) through two second insulating pillars (7). The shunt (6) is connected to the main negative relay (33) through the second conductive group (24) to form a negative circuit.

10. The battery disconnection unit as described in claim 7, characterized in that: It also includes a pre-charge resistor (8) and a pre-charge relay (9) disposed on the liquid cooling plate (1). The pre-charge resistor (8) and the pre-charge relay (9) are electrically connected in series, and the pre-charge resistor (8) and the pre-charge relay (9) are electrically connected in parallel with the main positive relay (32) to form a pre-charge circuit.

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