A battery disconnect unit and a battery, vehicle

Abstract

The utility model provides a kind of battery disconnect unit and battery, vehicle, battery disconnect unit includes: upper shell, upper shell is integrally formed with sampling copper bar and control copper bar and constitutes integrated piece, one side of integrated piece is fixedly installed with main shell;Main shell is provided with connecting copper bar, connecting copper bar is connected with battery, and switch piece is provided on the circuit of connecting copper bar, and switch piece is connected with control copper bar;Lower shell, lower shell is fixedly installed with the one side of main shell away from integrated piece.By the utility model, the stability and reliability of battery disconnect unit can be effectively improved, production cost is reduced, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle battery technology, and in particular to a battery disconnection unit, a battery, and a vehicle. Background Technology

[0002] The Battery Disconnection Unit (BDU) is a critical safety component in vehicle batteries, used to quickly disconnect the battery from the vehicle's load components in the event of a malfunction or emergency.

[0003] Within the BDU of related technologies, wiring harnesses are required to achieve corresponding functions, such as connecting high-voltage batteries, sampling batteries, and controlling the on / off state of switches. However, wiring harnesses are susceptible to electromagnetic interference, manufacturing errors, and other factors, resulting in poor stability. Furthermore, complex wiring harness arrangements can increase the space occupied by the BDU and raise production costs. Utility Model Content

[0004] In view of the above problems, a battery disconnection unit and battery, and a vehicle, are proposed to overcome or at least partially solve the above problems, including:

[0005] A battery disconnection unit, the battery disconnection unit comprising:

[0006] The upper housing 1, the upper housing 1, the sampling copper busbar 11 and the control copper busbar 12 are integrally formed to form an integral part, and one side of the integral part is fixed to the main housing 2;

[0007] The main housing 2 is provided with a connecting copper busbar 21, which is connected to the battery. A switch 22 is provided on the circuit where the connecting copper busbar 21 is located, and the switch 22 is connected to the control copper busbar 12.

[0008] The lower housing 3 is installed and fixed to the side of the main housing 2 away from the integral component.

[0009] Optionally, the switching element 22 includes a first switching element 221, a second switching element 222 and a third switching element 223, the second switching element 222 being disposed between the first switching element 221 and the third switching element 223, and a fuse 211 being disposed between the first switching element 221 and the second switching element 222.

[0010] Optionally, the main housing 2 is provided with receiving cavities 23 for accommodating the second switch 222 and the third switch 223 respectively.

[0011] Optionally, the control copper busbar 12 includes a first control copper busbar 121 and a second control copper busbar 122. The first control copper busbar 121 is connected to the first switch 221, and the second control copper busbar 122 is connected to the second switch 222 and the third switch 223, respectively.

[0012] Optionally, one end of the sampling copper busbar 11 is connected to the control system of the battery via a first connector 13, and one end of the control copper busbar 12 is connected to the control system via a second connector 14.

[0013] Optionally, a protective shell 4 is provided on the side of the upper shell 1 away from the main shell 2.

[0014] Optionally, an insulating film 5 is provided on the side of the upper housing 1 away from the main housing 2.

[0015] Optionally, a thermal pad 6 is provided on the side of the lower housing 3 away from the main housing 2.

[0016] A battery comprising a battery disconnect unit as described above.

[0017] A vehicle comprising the battery as described above.

[0018] The present invention has the following advantages: In the battery disconnection unit provided in the present invention, the sampling copper busbar for sampling the battery, the control copper busbar for controlling the switching components, and the connecting copper busbar connected to the battery are all copper busbar structures, realizing the elimination of wire harnesses for the entire BDU. The structure is simple and has higher stability and reliability compared to wire harnesses, and can also improve production efficiency. Moreover, the upper shell, control copper busbar and connecting copper busbar are integrally formed into a single piece, which can effectively reduce the space occupied by the BDU and reduce production costs. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of this utility model 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.

[0020] Figure 1 This is a schematic diagram of a BDU structure related to a certain technology;

[0021] Figure 2 This is an exploded view of a BDU provided in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the upper shell structure provided in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the overall structure of the BDU provided in one embodiment of the present invention;

[0024] Figure 5 This is a structural schematic diagram of the connecting copper busbar and the switch component provided in one embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the main housing structure provided in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the mounting structure of the copper busbar and switch provided in one embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of a copper busbar section to be cut according to an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of a battery and BDU mounting and fixing structure provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached drawings: Upper housing 1, sampling copper busbar 11, control copper busbar 12, first control copper busbar 121, second control copper busbar 122, first cutting part 123, second cutting part 124, first connector 13, second connector 14, mounting hole 15, main housing 2, connecting copper busbar 21, fuse 211, pre-charge resistor 212, current sensor 213, pin 214, switch 22, first switch 221, second switch 222, third switch 223, receiving cavity 23, snap-fit ​​structure 24, bolt 25, rubber pad 26, lower housing 3, protective shell 4, insulating film 5, thermal pad 6, battery 90, mounting bracket 901, high-voltage control harness 902, battery disconnection unit 91. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0031] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of the present invention. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0033] A related technology BDU structure is as follows Figure 1 As shown, it uses a wiring harness to realize the corresponding functions of the BDU, such as high-voltage sampling and low-voltage control.

[0034] It has the following drawbacks: the wire harness is limited by the equipment and manpower conditions of the production line during the manufacturing process, and the risk of failure is high; the wire harness is greatly affected by external environmental interference (such as electromagnetic interference); due to the complex wire harness layout structure, each component and wire harness in the BDU needs to be assembled manually, which is difficult to automate, resulting in low production efficiency, and will also increase the space occupied by the BDU, leading to higher production costs.

[0035] To address the above deficiencies, this utility model provides a battery disconnection unit to achieve overall wire harness elimination in the BDU, thereby improving production efficiency and reducing production costs.

[0036] The embodiments of this utility model will be described in detail below.

[0037] An embodiment of this utility model provides a battery disconnection unit, comprising:

[0038] The upper housing 1, the upper housing 1, the sampling copper busbar 11 and the control copper busbar 12 are integrally formed to form an integral part, and one side of the integral part is fixed to the main housing 2;

[0039] In this embodiment, as Figure 2 As shown, the upper housing 1, the main housing 2, and the lower housing 3 constitute the housing structure of the BDU, which is used to protect the internal components of the BDU. The upper housing 1, the main housing 2, and the lower housing 3 can be made of plastic or other materials.

[0040] In some examples, the structure of the upper housing 1 is as follows: Figure 3 As shown, multiple mounting holes 15 can be provided. By installing bolts into the mounting holes 15, the upper housing 1 can be fixed to the main housing 2.

[0041] In practical applications, such as Figure 4 The BDU structure shown is used to mount and fix the upper housing 1 and the main housing 2 through the mounting hole 15.

[0042] A copper busbar is a conductor that can be used as a transmission medium for current, electrical signals, etc.

[0043] The sampling copper busbar 11 is used to transmit data sampled from battery or circuit parameters, such as battery current, voltage, and temperature, to monitor the battery or circuit status and control the connection between the battery and load components in a timely manner. In some examples, the sampling copper busbar 11 can specifically be a sampling copper busbar that conducts high-voltage current, i.e., a high-voltage sampling copper busbar.

[0044] The control bus 12 is used to transmit control signals to the switching element 22. In some examples, the control bus 12 can be a control bus that conducts low-voltage current, i.e., a low-voltage control bus.

[0045] In practical applications, the upper housing 1, the sampling copper busbar 11, and the control copper busbar 12 can be integrally injection molded into a single part, and the excess small cross-section copper busbar can be cut off by stamping after injection molding.

[0046] In some embodiments of this utility model, a protective shell 4 is provided on the side of the upper shell 1 away from the main shell 2.

[0047] In this embodiment, as Figure 2 As shown, a protective shell 4 is provided on the side of the upper housing 1 away from the main housing 2 to protect the exposed components of the BDU, such as the input and output terminals of the BDU.

[0048] In some examples, such as Figure 4 As shown, the protective shell 4 can be installed and fixed in the upper housing 1 in an opening or groove that matches the shape of the protective shell 4, serving as the output electrode protective shell of the BDU.

[0049] In some embodiments of this utility model, an insulating film 5 is provided on the side of the upper housing 1 away from the main housing 2.

[0050] In this embodiment, as Figure 2 As shown, an insulating film 5 is also provided on the side of the upper housing 1 away from the main housing 2. The insulating film 5 is used to prevent operators from accidentally touching the high-voltage components of the BDU during the disassembly of the BDU, thereby improving safety; at the same time, it can also prevent foreign objects from falling into the BDU.

[0051] In some examples, such as Figure 4 As shown, the insulating film 5 can be attached to the side of the upper housing 1 away from the main housing 2.

[0052] The main housing 2 is provided with a connecting copper busbar 21, which is connected to the battery. A switch 22 is provided on the circuit where the connecting copper busbar 21 is located, and the switch 22 is connected to the control copper busbar 12.

[0053] In this embodiment, as Figure 2 As shown, a connecting copper busbar 21 is provided inside the main housing 2. The connecting copper busbar 21 is used to connect the battery and the load component. A switch 22 is provided on the circuit where the connecting copper busbar 21 is located. The switch 22 is used to connect to the control copper busbar 12 and control the on / off state of the battery and the load component by receiving the control signal from the control copper busbar 12. The main housing 2 may also be provided with bolts 25 for mounting and fixing the BDU mounting bracket to the battery.

[0054] In some examples, such as Figure 4 As shown, the bolt 25 can also be equipped with a rubber pad 26, which serves to reduce shock and buffer, and prevent the bolt 25 from slipping.

[0055] In practical applications, the connecting copper busbar 21 can be a connecting copper busbar that conducts high-voltage current, and the switching component 22 can be a relay.

[0056] In some embodiments of this utility model, the switching element 22 includes a first switching element 221, a second switching element 222 and a third switching element 223. The second switching element 222 is disposed between the first switching element 221 and the third switching element 223, and a fuse 211 is also disposed between the first switching element 221 and the second switching element 222.

[0057] The first switch 221, the second switch 222, and the third switch 223 can be different switches designed to meet the needs of different scenarios, such as different switches that independently control the on / off state of different circuits of the battery.

[0058] Fuse 211 is used to promptly disconnect the power supply and load components in the event of an overcurrent.

[0059] In some examples, such as Figure 5 As shown, the circuit where the copper busbar 21 is located is equipped with a first switch 221, a second switch 222, a third switch 223, a pre-charge resistor 212, a current sensor 213, and a pin 214. The second switch 222 is located between the first switch 221 and the third switch 223. A fuse 211 is also provided between the first switch 221 and the second switch 222.

[0060] The first switching element 221 is a pre-charge relay, used to control the on / off state of the battery's pre-charge (i.e., pre-charging) circuit. By having the pre-charge relay and pre-charge resistor 212 work together during the battery's pre-charge phase, the instantaneous large current generated when the high-voltage battery is powered on can be prevented from impacting the capacitor. For example, during the pre-charge phase, the pre-charge relay is closed, and the pre-charge relay and pre-charge resistor 212 form a pre-charge circuit, allowing current to charge the capacitor through the pre-charge resistor 212; when the current data collected by the current sensor 213 determines that the capacitor voltage is close to the battery voltage, the pre-charge relay is opened.

[0061] The second switching element 222 is a main positive relay, used to control the connection and disconnection of the high-voltage circuit between the load component and the battery. For example, when the main positive relay is closed, a high-voltage circuit is formed, the battery and the load component are connected, and the load component operates normally; when a circuit fault occurs, the main positive relay is opened, and the connection between the battery and the load component is also disconnected accordingly.

[0062] The third switch 223 is a fast-charging positive relay, used to control the on / off state of the battery's fast-charging (i.e., rapid charging) circuit during the fast-charging phase. For example, during the fast-charging phase, the fast-charging positive relay is closed, forming a fast-charging circuit to charge the battery; when fast charging is completed or a fault occurs in the fast-charging circuit, the fast-charging positive relay is opened, and fast charging stops.

[0063] Pin 214 is used to connect the first switch 221, the second switch 222, the third switch 223 and the control bus 12.

[0064] In some embodiments of this utility model, the main housing 2 is provided with receiving cavities 23 for accommodating the second switch member 222 and the third switch member 223 respectively.

[0065] The receiving cavity 23 protects the second switch 222 and the third switch 223, thereby eliminating the need for a housing design for the second switch 222 and the third switch 223, further reducing the space occupied by the BDU and lowering production costs.

[0066] In this embodiment, as Figure 2 As shown, the main housing 2 is provided with a receiving cavity 23.

[0067] In some examples, such as Figure 6 As shown, the main housing 2 is provided with two receiving cavities 23, which respectively accommodate the first switch 222 and the third switch 223.

[0068] In practical applications, the receiving cavity 23 can be a contoured cavity set in the main housing 2, with the size and shape of the contoured cavity matching those of the second switch 222 and the third switch 223, respectively. The second switch 222 and the third switch 223 are fixed in their respective contoured cavities by potting, eliminating the need for a housing, mounting bracket, and coil control terminals, further reducing space requirements. The remaining high-voltage components are customized according to layout and process requirements and placed in the main housing. The high-voltage components and the connecting copper busbar 21 are bolted together to form a high-voltage circuit.

[0069] The components within the BDU can also be developed using a customized platform, which can be adapted to components of different specifications (such as relays, fuses, etc.), reducing the development costs associated with developing BDU modules.

[0070] In some embodiments of this utility model, the control copper busbar 12 includes a first control copper busbar 121 and a second control copper busbar 122. The first control copper busbar 121 is connected to the first switch 221, and the second control copper busbar 122 is connected to the second switch 222 and the third switch 223 respectively.

[0071] The first control copper busbar 121 is used to transmit control signals to the first switch 221, and the second control copper busbar 122 is used to transmit control signals to the second switch 222 and the third switch 223, so as to control different switches through different lines.

[0072] In some examples, such as Figure 7 As shown, the control copper bus 12 includes a first control copper bus 121 and a second control copper bus 122. The first control copper bus 121 is connected to the first switch 221 through the pin 214 corresponding to the first switch 221. The second control copper bus 122 is connected to the second switch 222 and the third switch 223 through the pin 214 corresponding to the second switch 222 and the pin 214 corresponding to the third switch 223, respectively. The sampling copper bus 11 is connected to the first control copper bus 121 and the second control copper bus 122, respectively.

[0073] Among them, the first switch 221 is a pre-charge relay, the second switch 222 is a main positive relay, the third switch 223 is a fast-charge positive relay, the first control copper bus 121 is a pre-charge relay control copper bus that controls the pre-charge relay, and the second control copper bus 122 is a main circuit relay control copper bus that controls the main positive relay and the fast-charge positive relay.

[0074] In practical applications, Figure 7 The first cutting part 123 and the second cutting part 124 are the copper busbar parts to be cut after the control copper busbar 12, sampling copper busbar 11 and upper shell 1 are integrally injection molded.

[0075] In some examples, the structure of a copper busbar section to be cut can be as follows: Figure 8 As shown.

[0076] In some embodiments of this utility model, one end of the sampling copper busbar 11 is connected to the control system of the battery through a first connector 13, and one end of the control copper busbar 12 is connected to the control system through a second connector 14.

[0077] The first connector 13 is used to connect the sampling copper busbar 11 to the medium (e.g., wires) outside the BDU, so as to feed back the sampling data to the battery control system through the first connector 13, so that the battery system can issue corresponding control signals according to the sampling data; the second connector 14 is used to control the connection between the copper busbar 12 and the medium (e.g., wires) outside the BDU, so as to receive control signals sent from the battery control system.

[0078] In some examples, such as Figure 7 As shown, one end of the sampling copper busbar 11 is connected to the first connector 13, and one end of the control copper busbar 12 is connected to the second connector 14.

[0079] The lower housing 3 is installed and fixed to the side of the main housing 2 away from the integral component.

[0080] In practical applications, such as Figure 4 As shown, the lower housing 3 can be installed and fixed to the main housing 2 via the snap-fit ​​structure 24.

[0081] In some embodiments of this utility model, a heat-conducting pad 6 is provided on the side of the lower housing 3 away from the main housing 2.

[0082] Thermal pad 6 is used to transfer the heat generated by the high-voltage components inside the BDU for heat dissipation.

[0083] In some examples, such as Figure 2 As shown, a heat-conducting pad 6 is provided on the side of the lower housing 3 away from the main housing 2.

[0084] In practical applications, the water-cooled plate of the battery can be used to cool the high-voltage components inside the BDU through the thermal pad 6 to prevent the high-voltage components from overheating. At the same time, the thermal pad 6 can also serve as an insulator.

[0085] In some embodiments of this utility model, a battery is also provided, the battery including the battery disconnection unit as described above.

[0086] In some examples, such as Figure 9 As shown, a schematic diagram of the structure of a battery 90 is presented. The battery disconnection unit 91 is installed and fixed on the mounting bracket 901 of the battery 90 by bolts 25, and is connected to the control system of the battery 90 through a high-voltage control harness 902.

[0087] In some embodiments of this utility model, a vehicle is also provided, the vehicle including the battery as described above.

[0088] The present invention has the following advantages: In the battery disconnection unit provided in the present invention, the sampling copper busbar for sampling the battery, the control copper busbar for controlling the switching components, and the connecting copper busbar connected to the battery are all copper busbar structures, realizing the elimination of wire harnesses for the entire BDU. The structure is simple and has higher stability and reliability compared to wire harnesses, and can also improve production efficiency. Moreover, the upper shell, control copper busbar and connecting copper busbar are integrally formed into a single piece, which can effectively reduce the space occupied by the BDU and reduce production costs.

[0089] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0090] 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 battery disconnection unit, characterized in that, The battery disconnection unit includes: The upper housing (1) is integrally formed with the sampling copper busbar (11) and the control copper busbar (12) to form an integral part, and one side of the integral part is fixedly installed with the main housing (2); The main housing (2) is provided with a connecting copper busbar (21), which is connected to the battery. A switch (22) is provided on the circuit where the connecting copper busbar (21) is located, and the switch (22) is connected to the control copper busbar (12). The lower housing (3) is installed and fixed to the side of the main housing (2) away from the integral part.

2. The battery disconnection unit according to claim 1, characterized in that, The switching element (22) includes a first switching element (221), a second switching element (222) and a third switching element (223). The second switching element (222) is disposed between the first switching element (221) and the third switching element (223), and a fuse (211) is also disposed between the first switching element (221) and the second switching element (222).

3. The battery disconnection unit according to claim 2, characterized in that, The main housing (2) is provided with receiving cavities (23) for accommodating the second switch (222) and the third switch (223) respectively.

4. The battery disconnection unit according to claim 2 or 3, characterized in that, The control copper bus (12) includes a first control copper bus (121) and a second control copper bus (122). The first control copper bus (121) is connected to the first switch (221), and the second control copper bus (122) is connected to the second switch (222) and the third switch (223) respectively.

5. The battery disconnection unit according to claim 1, characterized in that, One end of the sampling copper busbar (11) is connected to the control system of the battery through the first connector (13), and one end of the control copper busbar (12) is connected to the control system through the second connector (14).

6. The battery disconnection unit according to claim 1, characterized in that, The upper housing (1) is provided with a protective shell (4) on the side away from the main housing (2).

7. The battery disconnection unit according to claim 1, characterized in that, An insulating film (5) is also provided on the side of the upper housing (1) away from the main housing (2).

8. The battery disconnection unit according to claim 1, characterized in that, A heat-conducting pad (6) is provided on the side of the lower housing (3) away from the main housing (2).

9. A battery, characterized in that, The battery includes a battery disconnect unit as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes the battery as described in claim 9.

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