Battery circuit breaking unit and power supply device

Abstract

The application provides a battery circuit breaking unit and a power supply device. The battery circuit breaking unit comprises a base, a plurality of relays, a fuse, and a plurality of relays. The relays are installed on the base, and the relays are provided with contacts at one end of the base. The plurality of relays comprises a first relay. The fuse is arranged at the bottom of the base. The fuse comprises a fuse body and a first connecting end. The fuse body is arranged on one side of the first relay. One end of the first connecting end is electrically connected to the fuse body. The other end of the first connecting end is electrically connected to the contact of the first relay. In the application, the fuse is arranged at the bottom of the base, so that the first connecting end and the contact are directly connected. An additional copper bar is not needed to connect between the contact of the first relay and the first connecting end of the fuse. It can be understood that one copper bar is reduced, the internal space of the battery circuit breaking unit is optimized, sufficient space is provided for the arrangement of other electrical components, and the space utilization is improved.

Description

Technical Field

[0001] This application belongs to the field of electrical control equipment technology, specifically relating to a battery circuit breaker unit and power supply device. Background Technology

[0002] The Battery Disconnect Unit (BDU), as a device for disconnecting and connecting high-voltage electricity to the power battery in new energy vehicles, plays a crucial role in the safety of the battery pack and is a critical component. The BDU not only undertakes important responsibilities for high-voltage circuit control, current distribution, and protection of the battery pack, but also ensures the safe and efficient operation of the entire vehicle's high-voltage system through its monitoring and coordination functions. Therefore, it needs to be developed towards greater intelligence and integration. However, the unreasonable layout of components in existing BDUs leads to low space utilization and limits the overall integration level. Utility Model Content

[0003] The purpose of this application is to provide a battery circuit breaker unit, a power supply device, and an electrical appliance, including but not limited to solving the problem of low internal space utilization of the battery circuit breaker unit.

[0004] The technical solution adopted in the embodiments of this application is: In a first aspect, this application provides a battery circuit breaker unit, the battery circuit breaker unit comprising: Base; Multiple relays, each relay mounted on the base, having a contact at one end facing the bottom of the base, the multiple relays including a first relay; and A fuse is disposed at the bottom of the base. The fuse includes a fuse body and a first connection terminal. The fuse body is disposed on one side of the first relay. One end of the first connection terminal is electrically connected to the fuse body, and the other end of the first connection terminal is electrically connected to the contact of the first relay.

[0005] In some embodiments, the fuse body has a preset surface, which is the bottom surface of the fuse body. The first connection end includes a first connection portion and a second connection portion. The first connection portion is connected to the side of the fuse body, and the second connection portion is bent and connected to one end of the first connection portion near the preset surface. The second connection portion is electrically connected to the bottom of the contacts of the first relay.

[0006] In some embodiments, the fuse body has a square structure.

[0007] In some embodiments, the base has a through groove at its bottom, the shape of which is adapted to the shape of the fuse body, and the fuse body is accommodated within the through groove.

[0008] In some embodiments, the fuse further includes a second connection terminal connected to the side of the fuse body opposite to the first connection terminal. The battery circuit breaker unit further includes a plurality of copper busbars, including a first copper busbar that is bent. One end of the first copper busbar is located at the top of the base for electrically connecting to the battery module, and the other end of the first copper busbar extends to the bottom of the base for electrically connecting to the second connection terminal.

[0009] In some embodiments, the battery circuit breaker unit further includes a shunt, which is disposed at the bottom of the base and includes a third connection terminal. The plurality of relays also include a second relay, and the third connection terminal is electrically connected to the contacts of the second relay.

[0010] In some embodiments, the shunt further includes a fourth connection terminal, and the battery circuit breaker unit further includes a plurality of copper busbars, the plurality of copper busbars including a second copper busbar, the second copper busbar being bent, one end of the second copper busbar being located at the top of the base for electrically connecting to the battery module, and the other end of the second copper busbar extending to the bottom of the base for electrically connecting to the fourth connection terminal.

[0011] In some embodiments, the battery circuit breaker unit further includes a circuit board, which is disposed on the side of the relay away from the contact, and the circuit board has a plurality of through holes; The relay has a control point at one end away from the contact, and part of the through hole is used for the first acquisition piece to pass through, so that one end of the first acquisition piece is soldered to the control point, and the other end of the first acquisition piece is soldered to the side of the circuit board away from the relay. The relay is provided with a collection point at the end opposite to the contact. Part of the through hole is used for the second collection piece to pass through, so that one end of the second collection piece is soldered to the collection point, and the other end of the second collection piece is soldered to the side of the circuit board opposite to the relay.

[0012] In some embodiments, the battery circuit breaker unit further includes a plurality of copper busbars, the plurality of copper busbars including a third copper busbar, the third copper busbar being bent, one end of the third copper busbar being located at the top of the base for electrically connecting to electrical equipment, and the other end of the third copper busbar extending to the bottom of the base for electrically connecting to the contacts of an adjacent relay.

[0013] Secondly, this application also provides a power supply device, which includes a battery module and a battery circuit breaker unit, wherein the battery circuit breaker unit is electrically connected to the battery module.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: In this application, since the fuse is located at the bottom of the base, the first connection terminal can be directly connected to the contact, eliminating the need for an additional copper busbar to connect the contacts of the first relay and the first connection terminal of the fuse. It is understood that reducing one copper busbar can optimize the internal space of the battery circuit breaker unit, thereby providing more space for the arrangement of other electrical components and improving space utilization. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a battery circuit breaker unit provided in an embodiment of this application.

[0017] Figure 2 for Figure 1 An exploded view of the battery circuit breaker unit shown.

[0018] Figure 3 for Figure 1 The battery circuit breaker unit shown is a cross-sectional view along line I-I.

[0019] Figure 4 This is a schematic diagram illustrating the assembly relationship between the first relay and the fuse provided in an embodiment of this application.

[0020] Figure 5 for Figure 3 The diagram shows the battery circuit breaker unit in area A.

[0021] Figure 6 A front view of a fuse provided in an embodiment of this application.

[0022] Figure 7 for Figure 6 A three-dimensional view of the fuse shown.

[0023] Figure 8 for Figure 1 Another exploded view of the battery circuit breaker unit shown.

[0024] Figure 9 for Figure 1The battery circuit breaker unit shown is a cross-sectional view along line II-II.

[0025] Figure 10 This is a schematic diagram showing the assembly relationship between the second relay and the shunt provided in an embodiment of this application.

[0026] Figure 11 for Figure 3 The diagram shows the battery circuit breaker unit in area B.

[0027] Figure 12 for Figure 1 The battery circuit breaker unit shown is a cross-sectional view along line III-III.

[0028] Figure 13 This is a schematic diagram of a circuit board provided in an embodiment of this application.

[0029] Figure 14 This is a schematic diagram of a relay provided in an embodiment of this application.

[0030] Figure 15 This is a top view of the battery circuit breaker unit provided in an embodiment of this application, with the protective cover hidden.

[0031] Figure 16 This is a diagram showing the relative positions of the electrical components in the battery circuit breaker unit provided in an embodiment of this application.

[0032] Figure 17 for Figure 1 Another exploded view of the battery disconnect unit shown.

[0033] Figure 18 for Figure 16 A schematic diagram of the electrical components shown from another perspective.

[0034] Figure 19 for Figure 1 Another exploded view of the battery disconnect unit shown.

[0035] Figure 20 for Figure 1 A schematic diagram of the battery circuit breaker unit shown from another perspective.

[0036] Figure 21 A schematic diagram of a power supply device provided in an embodiment of this application.

[0037] Figure 22 A schematic diagram of the electrical equipment provided in the embodiments of this application.

[0038] Explanation of key figure labels: Electrical equipment 100; power supply device 101; equipment body 102; battery circuit breaker unit 103; battery module 104; base 11; through groove 111; exterior surface 112; connector 113; male thread 114; relay 12; first relay 121; second relay 122; third relay 123; fourth relay 124; contact 1201; control point 1202; acquisition point 1203; fuse 13; first connection end 131; first connection part 1311; second connection part 1312; second connection end 132; fuse body 133; preset surface 133 1; Copper busbar 14; First copper busbar 141; Second copper busbar 142; Third copper busbar 143; First sub-busbar 1431; Second sub-busbar 1432; Fourth copper busbar 144; Diverter 15; Third connection terminal 151; Fourth connection terminal 152; Circuit board 16; Through hole 161; Data acquisition piece 17; First data acquisition piece 171; Second data acquisition piece 172; Thermal pad 18; Pre-charge resistor 19; Pre-charge relay 20; Protective cover 21; First connection position 211; Second connection position 212; Third connection position 213; Fourth connection position 214; Female buckle 215; Length direction F1; Height direction F2. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0044] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0045] Please refer to Figures 1 to 5 This application provides a battery disconnect unit (BDU) 103, which includes a base 11, a plurality of relays 12, and a fuse 13. The relays 12 are mounted on the base 11. One end of each relay 12 facing the bottom of the base 11 has a contact 1201. The plurality of relays 12 includes a first relay 121. The fuse 13 is disposed at the bottom of the base 11. The fuse 13 includes a fuse body 133 and a first connection terminal 131. The fuse body 133 is located on one side of the first relay 121. One end of the first connection terminal 131 is electrically connected to the fuse body 133. The other end of the first connection terminal 131 is electrically connected to the contact 1201 of the first relay 121.

[0046] Specifically, the base 11 is a fixed support in the battery circuit breaker unit 103 used to install various electrical components (such as the relay 12 and fuse 13 mentioned above), so that the electrical components are integrated into one unit and to protect the electrical components. The material of the base 11 can be, but is not limited to, plastic, metal, etc.

[0047] It should be noted that the "bottom of base 11" mentioned above refers to the battery circuit breaker unit 103 in its normal placement or usage state (e.g., Figure 1 As shown), the portion of the base 11 near the ground. Similarly, the "top of the base 11" refers to the battery disconnect unit 103 in its normal placement or usage state (e.g., ...). Figure 1(As shown), the portion of base 11 that is away from the ground. For subsequent descriptions of "bottom of base 11" or "top of base 11", please refer to the explanation here.

[0048] The main function of relay 12 is to connect or disconnect the main DC current of power supply device 101, ensuring that the high-voltage circuit can be safely started or stopped when needed. The base 11 can be provided with multiple receiving spaces, arranged along the length F1 of the base 11. Multiple relays 12 are correspondingly installed in each of the multiple receiving spaces, meaning the number of relays 12 is the same as the number of receiving spaces, with one relay 12 installed in each receiving space. Optionally, the number of relays 12 is four: a main positive relay, a fast-charging positive relay, a fast-charging negative relay, and a main negative relay.

[0049] The relay 12 can be a cased relay 12 or a caseless relay 12 (also known as a caseless relay 12). A cased relay 12 refers to a relay 12 with an external casing that protects the internal metal components, making them less susceptible to damage during assembly and transfer. A caseless relay 12 refers to a relay 12 without an external casing, exposing the metal components. Caseless relays are less expensive, smaller, and lighter. This application uses a cased relay 12 as an example.

[0050] Each relay 12 has two contacts 1201 for electrical connection to other electrical components. The relay 12 is mounted on the base 11 in an inverted configuration, meaning that the contacts 1201 are located at the bottom of the base 11 in the height direction F2.

[0051] In the battery circuit breaker unit 103, the fuse 13 is mainly used to work in conjunction with the relay 12 to ensure the safe operation of the circuit, especially to provide a fast interruption current in the event of a short circuit or severe overload to protect the circuit, equipment and personnel, while ensuring the stability and reliability of the system.

[0052] A fuse 13 is disposed at the bottom of the base 11 along the height direction F2 of the base 11. The fuse 13 includes a fuse body 133 and a first connection terminal 131 electrically connected to the fuse body 133. The fuse body 133 is disposed on one side of the first relay 121 along the length direction F1 of the base 11, and the first connection terminal 131 is connected to the contact 1201 of the first relay 121, so that the fuse 13 and the first relay 121 form an electrical connection relationship.

[0053] In related technologies, the fuse 13 is located at the top or middle of the base 11, which requires the use of an additional copper busbar 14 to connect between the contact 1201 of the first relay 121 and the first connection terminal 131 of the fuse 13, so that the fuse 13 and the first relay 121 form an electrical connection.

[0054] In this application, since the fuse 13 is located at the bottom of the base 11, the first connection terminal 131 can be directly connected to the contact 1201, eliminating the need for an additional copper busbar 14 to connect the contact 1201 of the first relay 121 and the first connection terminal 131 of the fuse 13. This reduces the number of components, assembly complexity and time, and lowers the cost of the copper busbar 14 and the overall cost of the battery circuit breaker unit 103. It is understood that reducing one copper busbar 14 optimizes the internal space of the battery circuit breaker unit 103, saves vertical space, provides more space for the arrangement of other electrical components, and makes the layout of the battery circuit breaker unit 103 more flexible. Simultaneously, its location at the bottom lowers the center of gravity of the battery circuit breaker unit 103, enhancing stability. The direct connection between the first connection terminal 131 and the contact 1201 eliminates additional contact points between the copper busbar 14 and the contact 1201, reducing contact resistance, heat generation, and energy loss. Furthermore, it simplifies the circuit structure, enabling the fuse 13 to detect and respond to abnormal currents more quickly.

[0055] Please refer to Figure 6 In some embodiments, the fuse body 133 has a preset surface 1331, which is the bottom surface of the fuse body 133. The first connection end 131 includes a first connection portion 1311 and a second connection portion 1312. The first connection portion 1311 is connected to the side of the fuse body 133. The second connection portion 1312 is bent and connected to one end of the first connection portion 1311 near the preset surface 1331. The second connection portion 1312 is electrically connected to the bottom of the contact 1201 of the first relay 121. The direct connection between the second connection portion 1312 and the contact 1201 eliminates additional contact points between the copper busbar 14 and the contact 1201, reduces contact resistance, reduces heat generation and energy loss, and simplifies the circuit structure, enabling the fuse 13 to detect and respond to abnormal currents more quickly.

[0056] Specifically, the connection between the first connecting part 1311 and the fuse body 133 can be a detachable connection (such as a bolt connection) or a non-detachable connection (such as welding). The first connecting part 1311 and the second connecting part 1312 are bent together, and the angle formed by the bend can be 90°. Of course, in other embodiments, it can also be 89°, 88°, 90.6°, 91°, 92.2°, etc. The bend connection between the first connecting part 1311 and the second connecting part 1312 can be rounded. The rounded transition can effectively disperse stress and avoid stress concentration during assembly or impact, which could lead to damage to the first connecting end 131. In the assembled state, the first connecting part 1311 is located between the first relay 121 and the fuse body 133, and the second connecting part 1312 is connected to the side of the first relay 121 that has a contact 1201. Furthermore, the second connecting portion 1312 is bent and connected to the end of the first connecting portion 1311 near the preset surface 1331. That is, the second connecting portion 1312 is positioned close to the preset surface 1331, so that the second connecting portion 1312 is located at the bottom of the fuse 13, thereby facilitating the connection of the second connecting portion 1312 to the contact 1201 of the first relay 121. The surface of the second connecting portion 1312 facing away from the first relay 121 may or may not be flush with the preset surface 1331.

[0057] Please refer to Figure 7 In some embodiments, the fuse body 133 is a square structure. A "square structure" refers to a structure with a rectangular or approximately rectangular cross-section or longitudinal section. "Approximately rectangular" means that it is not a perfect rectangle, but can be perceived as rectangular from a macroscopic perspective. For example, if a square structure has a groove on one side, the cross-sectional shape at the groove can be considered approximately rectangular. Or, if the two planes of the square structure are connected by an arc transition, the cross-sectional shape at the arc can be considered approximately rectangular.

[0058] In related technologies, the fuse body 133 adopts a cylindrical structure. However, the main bodies of the electrical components in the battery circuit breaker unit 103 are almost all square structures. This makes the shape of the fuse body 133 mismatched with that of the other electrical components, resulting in an excessively large gap space between the fuse 13 and the electrical components adjacent to the fuse 13. Therefore, adopting a cylindrical structure for the fuse body 133 is not conducive to the reasonable arrangement of the electrical components in a limited space.

[0059] In this embodiment, the fuse body 133 is set as a square structure, which saves copper busbar 1 material, reduces cost, and can be matched with various electrical components in the battery circuit breaker unit 103 (such as the first relay 121, which is also square in structure), thereby reducing the gap space. This provides favorable conditions for the reasonable arrangement of various electrical components in the limited space of the base 11, thereby improving space utilization, improving the overall energy efficiency of the battery circuit breaker unit 103, reducing the probability of failure, and enhancing the reliability and safety of the battery circuit breaker unit 103.

[0060] Please refer to Figure 8 In some embodiments, the base 11 has a through groove 111 at its bottom, the shape of which is adapted to the shape of the fuse body 133, and the fuse body 133 is accommodated in the through groove 111.

[0061] Specifically, the base 11 has an outer surface 112, which is the outer surface of the bottom of the base 11. The aforementioned through groove 111 is a receiving groove recessed from the outer surface 112 toward the top of the base 11. During the assembly of the fuse 13, the fuse 13 can first be moved to the bottom side of the base 11, with the preset surface 1331 of the fuse 13 facing away from the base 11. Then, the fuse body 133 is aligned with the through groove 111 and placed into the through groove 111. In this embodiment, the through groove 111 is also configured to match the shape of the fuse body 133, which makes the two fit better, avoids wasting the internal space of the base 11, and placing the fuse body 133 in the through groove 111 can also isolate it from other electrical components in the base 11 to prevent mutual interference.

[0062] Please refer to Figure 8 and Figure 9 In some embodiments, the fuse 13 further includes a second connection terminal 132 connected to the side of the fuse body 133 opposite to the first connection terminal 131. The battery circuit breaker unit 103 also includes a plurality of copper busbars 14, including a first copper busbar 141, which is bent. One end of the first copper busbar 141 is located at the top of the base 11 for electrical connection to the battery module 104. The other end of the first copper busbar 141 extends to the bottom of the base 11 for electrical connection to the second connection terminal 132.

[0063] Specifically, the copper busbar 14 is a conductor made of copper. The number of copper busbars 14 can be 5, 6, 7, 8, 9, etc.; this application uses 6 as an example. Of all the copper busbars 14, the one connected to the second connection terminal 132 of the fuse 13 is the first copper busbar 141. The second connection terminal 132 and the first connection terminal 131 can have the same or different shapes. Optionally, the second connection terminal 132 and the first connection terminal 131 are symmetrically arranged based on the fuse body 133.

[0064] The first copper busbar 141 has a bent design, extending from the bottom of the base 11 to the top of the base 11. Compared to a straight design, the bent design reduces the volume limitation of the battery disconnect unit 103, allowing the first copper busbar 141 to have a greater extension length. In other words, within the limited space of the base 11, the extension length of the bent first copper busbar 141 can be designed to be greater than that of a straight one, resulting in a larger surface area. A larger surface area is beneficial for improving the heat dissipation of the first copper busbar 141, preventing its temperature from becoming too high.

[0065] Please refer to Figure 10 and Figure 11 In some embodiments, the battery circuit breaker unit 103 further includes a shunt 15 disposed at the bottom of the base 11. The shunt 15 includes a third connection terminal 151, and the plurality of relays 12 further includes a second relay 122, wherein the third connection terminal 151 is electrically connected to the contact 1201 of the second relay 122.

[0066] Specifically, the shunt 15 is an electrical component used to collect current data and perform current detection by converting a large current into a measurable small voltage drop. The shunt 15 can be roughly elongated, and its length direction F1 can be consistent with the length direction F1 of the base 11.

[0067] The second relay 122 is the relay 12 that is furthest from the first relay 121 among the multiple relays 12. The contact 1201 of the second relay 122 is located at the bottom of the base 11, and the shunt 15 is also located at the bottom of the base 11. Thus, the third connection terminal 151 of the shunt 15 can be directly connected to the contact 1201 of the second relay 122.

[0068] In related technologies, the shunt 15 is located at the top or middle of the base 11, which requires the use of an additional copper busbar 14 to connect between the contact 1201 of the second relay 122 and the second connection terminal 132 of the shunt 15, so that the shunt 15 and the second relay 122 form an electrical connection.

[0069] In this embodiment, since the shunt 15 is located at the bottom of the base 11, the second connection terminal 132 can be directly connected to the contact 1201. This eliminates the need for an additional copper busbar 14 to connect the contact 1201 of the second relay 122 and the second connection terminal 132 of the shunt 15, saving costs, reducing the number of parts, and decreasing assembly complexity and time consumption. It is understood that reducing one copper busbar 14 optimizes the internal space of the battery circuit breaker unit 103, providing more space for the arrangement of other electrical components. Simultaneously, reducing cross-connections simplifies the internal wiring layout of the battery circuit breaker unit 103.

[0070] Please refer to Figure 12 In some embodiments, the shunt 15 further includes a fourth connection terminal 152. The battery circuit breaker unit 103 also includes a plurality of copper busbars 14, including a second copper busbar 142, which is bent. One end of the second copper busbar 142 is located at the top of the base 11 for electrical connection to the battery module 104. The other end of the second copper busbar 142 extends to the bottom of the base 11 for electrical connection to the fourth connection terminal 152.

[0071] Specifically, the fourth connection terminal 152 is the end of the splitter 15 that is furthest from the third connection terminal 151. The fourth connection terminal 152 and the third connection terminal 151 may have the same or different shapes. Optionally, the fourth connection terminal 152 and the third connection terminal 151 are symmetrical structures on the splitter 15.

[0072] The second copper busbar 142 has a bent design, extending from the bottom of the base 11 to the top of the base 11. Within the limited space of the base 11, the extended length of the bent second copper busbar 142 can be designed to be greater than that of a straight extension, thereby increasing the surface area of ​​the bent second copper busbar 142. The larger surface area is beneficial to improving the heat dissipation effect of the second copper busbar 142, preventing the temperature of the second copper busbar 142 from becoming too high.

[0073] Please refer to Figures 13 to 15 In some embodiments, the battery circuit breaker unit 103 further includes a circuit board 16 and a data acquisition piece 17. The circuit board 16 is located on the side of the relay 12 opposite to the contact 1201, and the circuit board 16 has multiple through holes 161. The shape of the through holes 161 can be, but is not limited to, circular, square, elliptical, triangular, etc. The data acquisition piece 17 includes a first data acquisition piece 171 and a second data acquisition piece 172.

[0074] The relay 12 has a control point 1202 at one end away from the contact 1201. Part of the through hole 161 is used for the first acquisition piece 171 to pass through, so that one end of the first acquisition piece 171 is soldered to the control point 1202, and the other end of the first acquisition piece 171 is soldered to the side of the circuit board 16 away from the relay 12.

[0075] The relay 12 is provided with a collection point 1203 at one end away from the contact 1201. Part of the through hole 161 is used for the second collection piece 172 to pass through, so that one end of the second collection piece 172 is soldered to the collection point 1203, and the other end of the second collection piece 172 is soldered to the side of the circuit board 16 away from the relay 12.

[0076] Specifically, the relay 12 has two control points 1202 and two acquisition points 1203 on the end opposite to the contact 1201. The control point 1202 acts as a switch to control the operation of the relay 12. The acquisition point 1203 is used to acquire voltage (high-voltage sampling point).

[0077] Circuit board 16 is positioned above relay 12 and is used for electrical connection of various electrical components. Compared to wiring harnesses, using circuit board 16 makes the interior of battery circuit breaker unit 103 neater and less cluttered, thus facilitating the arrangement of various electrical components. Multiple positioning posts can be provided on base 11, which are inserted into circuit board 16. This allows circuit board 16 to be positioned using the positioning posts, ensuring that circuit board 16 can be quickly assembled into the correct position and that it will not deviate from its correct position during subsequent assembly of other components.

[0078] The first data acquisition piece 171 is made of a conductive material, such as copper. Its function is to act as a conductor controlling the operation of the relay 12. The shape of the first data acquisition piece 171 can be, but is not limited to, Z-shaped. The first data acquisition piece 171 passes through the through-hole 161 of the circuit board 16, and its opposite ends are soldered to the circuit board 16 and the control point 1202, respectively. Soldering the first data acquisition piece 171 to connect the circuit board 16 and the control point 1202 avoids poor contact between the two. Multiple first data acquisition pieces 171 can be used; for example, eight first data acquisition pieces 171 can be connected to eight control points 1202 of the four relays 12.

[0079] The second sensing element 172 is made of a conductive material, such as copper. Its function is to collect the voltage of various electrical components, thereby detecting their operating status. The shape of the second sensing element 172 can be, but is not limited to, Z-shaped. The second sensing element 172 passes through the through-hole 161 of the circuit board 16, and its opposite ends are soldered to the circuit board 16 and the sensing point 1203, respectively. Soldering the second sensing element 172 to connect the circuit board 16 and the sensing point 1203 avoids poor contact between the two. Multiple second sensing elements 172 can be used; for example, eight second sensing elements 172 can be connected to eight sensing points 1203.

[0080] Please refer to Figure 16 In some embodiments, the battery disconnect unit 103 further includes a plurality of copper busbars 14, including a third copper busbar 143, which is bent. One end of the third copper busbar 143 is located at the top of the base 11 and is used for electrical connection to the electrical device 100 (e.g., a charging / discharging port on the vehicle side). The other end of the third copper busbar 143 extends to the bottom of the base 11 and is used for electrical connection to the contacts 1201 of the adjacent relay 12.

[0081] Please refer to Figure 16 In some embodiments, the relay 12 further includes a third relay 123 and a fourth relay 124 disposed between the first relay 121 and the second relay 122. The third relay 123 is disposed adjacent to the first relay 121. The fourth relay 124 is disposed adjacent to the second relay 122. There are two third copper busbars 143, referred to herein as the first sub-busbar 1431 and the second sub-busbar 1432. The first sub-busbar 1431 is connected to one contact 1201 of the first relay 121 and one contact 1201 of the third relay 123. The second sub-busbar 1432 is connected to one contact 1201 of the second relay 122 and one contact 1201 of the fourth relay 124.

[0082] Please refer to Figure 16 In some embodiments, the plurality of copper busbars 14 include two fourth copper busbars 144, one of which is connected to the contact 1201 of the third relay 123, and the other of which is connected to the contact 1201 of the fourth relay 124.

[0083] Please refer to Figure 17In some embodiments, the battery circuit breaker unit 103 further includes a thermal pad 18, which is disposed at the bottom of the base 11. One side of the thermal pad 18 is simultaneously connected to the copper busbars 14 (third copper busbar 143, fourth copper busbar 144), the first connecting end 131, the second connecting end 132, the third connecting end 151, and the fourth connecting end 152. The other side of the thermal pad 18 is used to connect to the liquid cooling plate. The liquid cooling plate is a component of the power supply device 101, and coolant circulates inside it. It is understood that by setting the thermal pad 18, the heat generated by the electrical components can be guided to the liquid cooling plate, thereby achieving heat dissipation and preventing overheating. The material of the thermal pad 18 can be, but is not limited to, silicone, epoxy resin, etc.

[0084] Please refer to Figure 18 In some embodiments, the battery circuit breaker unit may further include a pre-charging resistor 19, which is disposed on top of the base 11 and above the fuse 13, thereby making the structure more compact and improving the overall integration of the battery circuit breaker unit 103. The pre-charging resistor 19 is isolated from the fuse 13 by the base 11. The pre-charging resistor 19 plays a role in limiting current in the battery circuit breaker unit 103, mainly for protecting high-voltage electrical components. Taking the application of the battery circuit breaker unit 103 in an electric vehicle as an example: when the high-voltage system of the electric vehicle is powered on, the pre-charging resistor 19 can slowly charge the capacitor, preventing damage to capacitors or switching devices such as DC contactors due to excessive instantaneous current. Without the pre-charging resistor 19, a large transient current surge may occur, thereby damaging other critical components in the circuit (such as the relay 12).

[0085] Please refer to Figure 18 In some embodiments, the battery circuit breaker unit 103 may further include a pre-charge relay 20, which is mounted on the base 11 and disposed adjacent to the pre-charge resistor 19. The pre-charge relay 20 is used to protect the high-voltage circuit from instantaneous high current surges when the system is powered on, and achieves smooth charging by being connected in series with the pre-charge resistor 19, thus avoiding damage to electrical components.

[0086] Please refer to Figure 19 In some embodiments, the battery circuit breaker unit 103 may further include a protective cover 21, which is disposed on the base 11. The protective cover 21 is used to protect the various electrical components inside the battery circuit breaker unit 103, thereby providing high-voltage protection. The protective cover 21 is detachably connected to the base 11, which facilitates the subsequent opening of the protective cover 21 for maintenance or replacement of the electrical components on the base 11.

[0087] Please refer to Figure 19In some embodiments, the edge of the protective cover 21 is provided with a plurality of female buckles 215, which are arranged at intervals along the periphery of the protective cover 21. The outer wall of the base 11 is provided with a plurality of male buckles 114, which are arranged at intervals along the outer periphery of the base 11. When the protective cover 21 is placed on the base 11, the male buckles 114 engage with the female buckles 215 to form a detachable connection. Of course, in some embodiments, the female buckles 215 can also be provided on the base 11, and the male buckles 114 can be provided on the protective cover 21. It should be noted that the female buckles 215 and male buckles 114 described above are only exemplary illustrations of a detachable connection. In other embodiments, magnetic connections, bolt connections, etc., can also be used to achieve detachability, which will not be detailed here.

[0088] Please refer to Figure 19 In some embodiments, the base 11 may be provided with a plurality of connectors 113 for connecting to external components via threaded means (such as bolts) to secure the battery disconnect unit 103 to the external components. Example: The number of connectors 113 may be four, with the four connectors 113 respectively located at the four corners of the base 11.

[0089] Please refer to Figure 20 In some embodiments, the protective cover 21 is provided with a first connection position 211, a second connection position 212, a third connection position 213, and a fourth connection position 214. The first connection position 211 exposes the second copper busbar 142 electrically connected to the shunt 15. The second connection position 212 exposes two fourth copper busbars 144 electrically connected to the relay 12. The third connection position 213 exposes the third copper busbar 143 (i.e., the first sub-busbar 1431 and the second sub-busbar 1432) electrically connected to the relay 12. The fourth connection position 214 exposes the first copper busbar 141. When the battery disconnect unit 103 is applied to an electric vehicle, the exposed second copper busbar 142 is connected to the negative terminal of the battery module 104. The exposed fourth copper busbar 144 is connected to the vehicle's discharge port. The exposed third copper busbar 143 is connected to the vehicle's charging port. The exposed first copper busbar 141 is connected to the positive terminal of the battery module 104.

[0090] In this application, all electrical components, including relay 12, pre-charge resistor 19, pre-charge relay 20, shunt 15, and fuse 13, are mounted on a single base 11. This layout achieves a very high degree of integration, thereby increasing the energy density and power density of the power supply device 101. Furthermore, the use of circuit board 16 to achieve wireless routing optimizes electrical connections. This layout also results in shorter wiring paths for copper busbar 14, reducing energy loss and facilitating the uniform distribution and management of heat.

[0091] Please refer to Figure 21This application also provides a power supply device 101, which includes a battery module 104 and a battery circuit breaker unit 103, the battery circuit breaker unit 103 being electrically connected to the battery module 104. The battery circuit breaker unit 103 can perform high-voltage circuit control, current distribution, and protection for the power supply device 101. If applied to electric vehicles, it can also ensure the safe and efficient operation of the vehicle's high-voltage system through monitoring and coordination functions. In the automotive field, the power supply device 101 can also be referred to as a battery pack. A battery pack can contain multiple series-parallel connected battery modules 104, a battery management system (BMS), a thermal management system, etc.

[0092] Please refer to Figure 22 The power supply device 101 is applied to the electrical equipment 100 to supply power to the equipment body 102 of the electrical equipment 100. The electrical equipment 100 may be, but is not limited to, vehicles (such as vehicles, cruise ships, airplanes, etc.), digital products (such as computers, audio equipment, digital cameras, etc.), home appliances (such as vacuum cleaners, robot vacuum cleaners, washing machines, etc.), processing equipment (such as cutting machines, electric drills, angle grinders, etc.), health monitoring equipment (such as portable electrocardiographs, blood glucose meters, etc.), electric toys (such as remote control cars, drones, remote control boats, etc.), etc.

[0093] In the embodiments of this application, the electrical equipment 100 is only illustrated by way of a vehicle, which may be, but is not limited to, cars, buses, trucks, SUVs, electric bicycles, etc. For a vehicle, its equipment body 102 may include a frame, various electrical loads (such as power systems, lighting systems, etc.).

[0094] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A battery circuit breaker unit, characterized in that, The battery circuit breaker unit (103) includes: Base (11); A plurality of relays (12) are mounted on the base (11), each relay (12) having a contact (1201) at one end facing the bottom of the base (11), the plurality of relays (12) including a first relay (121); and A fuse (13) is disposed at the bottom of the base (11). The fuse (13) includes a fuse body (133) and a first connection terminal (131). The fuse body (133) is disposed on one side of the first relay (121). One end of the first connection terminal (131) is electrically connected to the fuse body (133), and the other end of the first connection terminal (131) is electrically connected to the contact (1201) of the first relay (121).

2. The battery circuit breaker unit as described in claim 1, characterized in that, The fuse body (133) has a preset surface (1331), which is the bottom surface of the fuse body (133). The first connection end (131) includes a first connection part (1311) and a second connection part (1312). The first connection part (1311) is connected to the side of the fuse body (133), and the second connection part (1312) is bent and connected to one end of the first connection part (1311) near the preset surface (1331). The second connection part (1312) is electrically connected to the bottom of the contact (1201) of the first relay (121).

3. The battery circuit breaker unit as described in claim 1, characterized in that, The fuse body (133) has a square structure.

4. The battery circuit breaker unit as described in claim 3, characterized in that, The base (11) has a through groove (111) at its bottom. The shape of the through groove (111) is adapted to the shape of the fuse body (133). The fuse body (133) is accommodated in the through groove (111).

5. The battery circuit breaker unit as described in claim 1, characterized in that, The fuse (13) further includes a second connection terminal (132), which is connected to the side of the fuse body (133) away from the first connection terminal (131). The battery circuit breaker unit (103) further includes a plurality of copper busbars (14), which include a first copper busbar (141). The first copper busbar (141) is bent. One end of the first copper busbar (141) is located at the top of the base (11) for electrically connecting the battery module (104). The other end of the first copper busbar (141) extends to the bottom of the base (11) for electrically connecting the second connection terminal (132).

6. The battery circuit breaker unit as described in claim 1, characterized in that, The battery circuit breaker unit (103) also includes a shunt (15), which is disposed at the bottom of the base (11). The shunt (15) includes a third connection terminal (151), and the plurality of relays (12) also include a second relay (122). The third connection terminal (151) is electrically connected to the contact (1201) of the second relay (122).

7. The battery circuit breaker unit as described in claim 6, characterized in that, The shunt (15) further includes a fourth connection terminal (152), and the battery circuit breaker unit (103) further includes a plurality of copper busbars (14), the plurality of copper busbars (14) including a second copper busbar (142), the second copper busbar (142) being bent, one end of the second copper busbar (142) being located at the top of the base (11) for electrically connecting the battery module (104), and the other end of the second copper busbar (142) extending to the bottom of the base (11) for electrically connecting to the fourth connection terminal (152).

8. The battery circuit breaker unit as described in any one of claims 1 to 7, characterized in that, The battery circuit breaker unit (103) also includes a circuit board (16), which is located on the side of the relay (12) away from the contact (1201), and the circuit board (16) has a plurality of through holes (161). The relay (12) has a control point (1202) at one end away from the contact (1201), and part of the through hole (161) is used for the first acquisition piece (171) (17) to pass through, so that one end of the first acquisition piece (171) (17) is soldered to the control point (1202), and the other end of the first acquisition piece (171) (17) is soldered to the side of the circuit board (16) away from the relay (12); The relay (12) is provided with a collection point (1203) at one end away from the contact (1201). Part of the through hole (161) is used for the second collection piece (172) (17) to pass through, so that one end of the second collection piece (172) (17) is soldered to the collection point (1203), and the other end of the second collection piece (172) (17) is soldered to the side of the circuit board (16) away from the relay (12).

9. The battery circuit breaker unit as described in claim 1, characterized in that, The battery circuit breaker unit (103) also includes a plurality of copper busbars (14), the plurality of copper busbars (14) including a third copper busbar (143), the third copper busbar (143) being bent, one end of the third copper busbar (143) being located at the top of the base (11) for electrically connecting the electrical equipment (100), and the other end of the third copper busbar (143) extending to the bottom of the base (11) for electrically connecting the contacts (1201) of the adjacent relay (12).

10. A power supply device, characterized in that, The power supply device (101) includes a battery module (104) and a battery circuit breaker unit as described in any one of claims 1 to 9, wherein the battery circuit breaker unit (103) is electrically connected to the battery module (104).

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