Voltage dividing relay, battery management system, battery assembly, and powered device

Abstract

The application provides a voltage division relay, a battery management system, a battery assembly and a power utilization device. The voltage division relay comprises a relay body, a metal strip assembly and a voltage division circuit assembly. The metal strip assembly comprises a first metal strip and a second metal strip. The voltage division circuit assembly is arranged outside the relay body. The input end of the voltage division circuit assembly and the input end of the relay body are electrically connected with the first metal strip. The output end of the voltage division circuit assembly and the output end of the relay body are electrically connected with the second metal strip. The first metal strip and the second metal strip are configured to be electrically connected with an external circuit. The voltage division relay has high reliability, versatility and maintainability.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a voltage divider relay, a battery management system, a battery assembly, and an electrical device. Background Technology

[0002] To achieve segmented voltage management of high-voltage battery packs and reduce the probability of thermal runaway and insulation failure, contactors with integrated voltage divider circuit structures are introduced into the battery packs to optimize the circuit control of the battery packs.

[0003] In existing technical solutions, integrating the voltage divider circuit structure inside the contactor can improve integration, but it also brings the following disadvantages: First, the limited internal space of the contactor and poor heat dissipation mean that the resistive elements in the voltage divider circuit generate heat during operation, leading to excessively high local temperatures. The contactor's contacts also generate arcing heat when opening and closing. The combined heat from both accelerates component aging or damage, resulting in decreased voltage division accuracy and reduced reliability. Second, integrating the voltage divider circuit structure inside the contactor increases the overall size, making it difficult to adapt to existing equipment or installation space, thus reducing its versatility. Third, if a part fails (such as a burnt-out resistor or contact failure), fault diagnosis becomes complex, and the damaged part cannot be repaired individually; the entire unit must be replaced, increasing maintenance costs. Utility Model Content

[0004] Based on this, this application provides a voltage divider relay, a battery management system, a battery assembly, and an electrical device to address the shortcomings of related technologies.

[0005] In a first aspect, this application provides a voltage divider relay, comprising:

[0006] Relay body;

[0007] A metal busbar assembly, comprising a first metal busbar and a second metal busbar;

[0008] The voltage divider circuit assembly is located outside the relay body;

[0009] The input terminals of the voltage divider circuit assembly and the relay body are both electrically connected to the first metal busbar, and the output terminals of the voltage divider circuit assembly and the relay body are both electrically connected to the second metal busbar. Both the first and second metal busbars are configured to be electrically connected to an external circuit.

[0010] In one possible implementation, the voltage divider circuit assembly includes a substrate and at least one voltage divider element, the voltage divider element being disposed on one side of the substrate in the thickness direction and electrically connected to the substrate.

[0011] The input terminal of the substrate is electrically connected to the first metal busbar, and the output terminal of the substrate is electrically connected to the second metal busbar.

[0012] In one possible implementation, the voltage divider circuit assembly further includes at least one reinforcing member connected to the substrate.

[0013] The reinforcing member has a through hole, and the voltage divider element is located inside the through hole.

[0014] In one possible implementation, the voltage divider circuit assembly further includes two contacts: one contact connects the substrate and the first metal busbar, and the other contact connects the substrate and the second metal busbar.

[0015] In one possible implementation, at least one contact element has a positioning hole.

[0016] In one possible implementation, the contact is welded or threaded to the first metal busbar; and / or, the contact is welded or threaded to the first metal busbar.

[0017] In one possible implementation, the voltage divider circuit assembly further includes a support member connected to the side of the substrate away from the voltage divider element.

[0018] In one possible implementation, the substrate has an I-shaped, L-shaped, or U-shaped form, and the shape of the support matches the shape of the substrate.

[0019] In one possible implementation, the support component is made of one of foam, fuzz, and plastic.

[0020] In one possible implementation, the support is connected to the relay body;

[0021] Alternatively, it may also include a housing, in which the relay body and voltage divider circuit assembly are all housed, and the relay body and support are connected to the housing.

[0022] Secondly, this application provides a battery management system, including:

[0023] The voltage divider relay provided in the first aspect above;

[0024] The main control component and the voltage divider relay are electrically connected to the main control component.

[0025] Thirdly, this application provides a battery assembly, comprising:

[0026] The voltage divider relay provided in the first aspect above;

[0027] The battery pack and the voltage divider relay are electrically connected to the battery pack.

[0028] Thirdly, this application provides an electrical device, including a load, a battery management system provided in the second aspect above, the battery management system being electrically connected to the load, and / or a battery assembly provided in the third aspect above, the battery assembly being electrically connected to the load.

[0029] The voltage divider relay, battery management system, battery module, and electrical device provided in this application embodiment include a voltage divider relay comprising a relay body, a metal busbar assembly, and a voltage divider circuit assembly. The metal busbar assembly includes a first metal busbar and a second metal busbar. Because the voltage divider circuit assembly is disposed outside the relay body in this embodiment, it prevents the voltage divider circuit assembly and the relay body from being disposed in the same confined space. This prevents the heat from accumulating between the voltage divider circuit assembly and the relay body, thereby preventing excessively high local temperatures in the voltage divider relay from damaging components and effectively ensuring the operational reliability of the voltage divider relay.

[0030] Because the voltage divider circuit assembly is located outside the relay body, the voltage divider circuit assembly can be flexibly adjusted according to the installation environment, rather than being limited to a specific installation space, thereby improving the versatility of the voltage divider relay.

[0031] Since the voltage divider circuit assembly is located outside the relay body, it is easier to diagnose the voltage divider circuit assembly and the relay body separately during fault diagnosis. After the fault point is determined, only the faulty voltage divider circuit assembly or the relay body needs to be repaired or replaced, without having to repair or replace the entire voltage divider relay. This effectively reduces the maintenance cost of the voltage divider relay.

[0032] Since the relay body and the voltage divider circuit assembly can be electrically connected through the first metal busbar and the second metal busbar, a voltage divider relay with the same electrical principle as the related technology can be constructed, and the voltage divider relay can be conveniently connected to the external circuit without affecting the basic function of the voltage divider relay.

[0033] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the voltage divider relay, battery management system, battery module, and electrical equipment provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a voltage divider relay provided in an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the structure of the voltage divider circuit assembly in the voltage divider relay provided in the embodiments of this application;

[0037] Figure 3 for Figure 2 The main view;

[0038] Figure 4 Another structural schematic diagram of the voltage divider circuit assembly in the voltage divider relay provided in the embodiments of this application;

[0039] Figure 5 for Figure 3 The right view;

[0040] Figure 6 for Figure 3 Top view.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100 - Relay body;

[0043] 200 - Metal busbar assembly; 210 - First metal busbar; 220 - Second metal busbar;

[0044] 300 - Voltage divider circuit assembly; 310 - Substrate; 320 - Voltage divider element; 330 - Reinforcing member; 331 - Through hole; 340 - Contact member; 341 - Positioning hole; 342 - Connection hole; 350 - Support member. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0049] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0050] In existing technical solutions, integrating the voltage divider circuit structure inside the contactor can improve integration, but it also brings the following disadvantages: First, the limited internal space of the contactor and poor heat dissipation mean that the resistive elements in the voltage divider circuit generate heat during operation, leading to excessively high local temperatures. The contactor's contacts also generate arcing heat when opening and closing. The combined heat from both accelerates component aging or damage, resulting in decreased voltage division accuracy and reduced reliability. Second, integrating the voltage divider circuit structure inside the contactor increases the overall size, making it difficult to adapt to existing equipment or installation space, thus reducing its versatility. Third, if a part fails (such as a burnt-out resistor or contact failure), fault diagnosis becomes complex, and the damaged part cannot be repaired individually; the entire unit must be replaced, increasing maintenance costs.

[0051] In view of the above problems, this application provides a voltage divider relay, a battery management system, a battery pack, and an electrical device. In the voltage divider relay, the voltage divider circuit assembly is disposed outside the relay body. The voltage divider circuit assembly is electrically connected to the relay body through a metal busbar assembly, so that the voltage divider circuit assembly and the relay body are connected in parallel to form a voltage divider relay. Since the voltage divider circuit assembly is disposed outside the relay body, the heat of the voltage divider circuit assembly and the relay body can be avoided, thereby preventing the local temperature of the voltage divider relay from becoming too high. In addition, when one or both of the voltage divider circuit assembly and the relay body fail, the location of the fault can be quickly diagnosed, and only the faulty component needs to be repaired or replaced, thereby reducing the maintenance cost of the voltage divider relay.

[0052] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific implementation methods of the voltage divider relay, battery management system, battery module, and electrical equipment provided in this application.

[0053] Reference Figure 1 As shown, the voltage divider relay provided in this application embodiment includes a relay body 100, a metal busbar assembly 200, and a voltage divider circuit assembly 300. The metal busbar assembly 200 includes a first metal busbar 210 and a second metal busbar 220.

[0054] The voltage divider circuit assembly 300 is disposed outside the relay body 100. The input terminal of the voltage divider circuit assembly 300 and the input terminal of the relay body 100 are both electrically connected to the first metal busbar 210. The output terminal of the voltage divider circuit assembly 300 and the output terminal of the relay body 100 are both electrically connected to the second metal busbar 220. Both the first metal busbar 210 and the second metal busbar 220 are configured to be electrically connected to an external circuit.

[0055] Voltage divider relays can manage the voltage of battery modules. They can monitor the voltage level in the battery module's circuitry and trigger the relay when the voltage exceeds a preset threshold, thereby preventing other components of the battery module from being damaged by overvoltage.

[0056] For example, a high-voltage battery assembly may include multiple battery packs, and a voltage divider relay may be set between every two battery packs. The voltage divider relay may be connected in series between the two battery packs to achieve segmented management of the battery assembly voltage.

[0057] In this embodiment, the relay body 100 is used to control the on / off state of the circuit, and the voltage divider circuit assembly 300 is used to monitor the input voltage. When the input voltage is applied to the voltage divider relay, the voltage divider circuit assembly 300 will reduce the voltage to a level suitable for the voltage divider relay to detect, thereby enabling the voltage divider relay to work in a high-voltage environment without directly bearing high voltage.

[0058] It is important to understand that when the relay body 100 is closed, the high voltage will cause a transient electrical shock. This transient electrical shock can damage other components of the battery management system (e.g., the battery information acquisition unit, BIC). Setting a voltage divider balance circuit in the voltage divider relay circuit can balance the potential difference of each battery pack, thereby effectively avoiding the above phenomenon.

[0059] In addition, when the relay body 100 is disconnected, the voltage divider circuit assembly 300 can also perform insulation detection on the battery assembly circuit, thereby improving the safety of the battery assembly.

[0060] Specifically, the relay body 100 may include a housing, as well as contacts, coils and iron cores disposed within the housing. When the voltage of the voltage divider relay exceeds a preset threshold, current flows through the coil and generates a magnetic field. The generated magnetic field attracts the iron core, causing the contacts of the relay body 100 to open, thereby disconnecting the circuit.

[0061] The metal busbar assembly 200 may include a first metal busbar 210 and a second metal busbar 220. Since the input terminal of the voltage divider circuit assembly 300 and the input terminal of the relay body 100 are both electrically connected to the first metal busbar 210, and the output terminal of the voltage divider circuit assembly 300 and the output terminal of the relay body 100 are both electrically connected to the second metal busbar 220, the relay body 100 and the voltage divider circuit assembly 300 can be connected in parallel through the first metal busbar 210 and the second metal busbar 220. In other words, the voltage divider relay of this embodiment is consistent with the related technology in terms of electrical principle.

[0062] The voltage divider relay can also be connected in parallel or in series with the battery pack through the first metal busbar 210 and the second metal busbar 220, thereby enabling the voltage divider relay to be connected to the circuit of the battery pack.

[0063] For example, the first metal busbar 210 and the second metal busbar 220 can be copper busbars or aluminum busbars.

[0064] Compared to related technologies where the voltage divider circuit structure is integrated inside the contactor, the voltage divider circuit assembly 300 of this embodiment is disposed outside the housing of the relay body 100. Therefore, the voltage divider element 320 of the voltage divider circuit assembly 300 and the contacts of the relay body 100 can be placed in two independent spaces. When the voltage divider relay is working, the heat of the two will not be superimposed, thereby effectively preventing the local temperature of the voltage divider relay from becoming too high, thus ensuring the voltage dividing accuracy of the voltage divider relay.

[0065] Because the voltage divider circuit assembly 300 is located outside the housing of the relay body 100, it can be flexibly adjusted according to the installation environment, rather than being limited to a specific installation space, thereby improving the versatility of the voltage divider relay. For example, the voltage divider circuit assembly 300 can be mounted on the battery pack bracket, or it can be mounted on the housing of the relay body 100.

[0066] The voltage divider circuit assembly 300 in this embodiment can be made into a standard part. By selecting different specifications of voltage divider elements 320, it can be adapted to different models of relay bodies 100. The voltage divider circuit assembly 300 and the relay body 100 can be matched to form different models of voltage divider relays to meet different needs. In this way, the development cost of voltage divider relays can be effectively reduced.

[0067] Since the voltage divider circuit assembly 300 is located outside the housing of the relay body 100, it is relatively convenient to diagnose the voltage divider circuit assembly 300 and the relay body 100 separately during fault diagnosis. If the voltage divider circuit assembly 300 is integrated inside the relay body 100, further disassembly is required to determine the specific fault point, and the diagnosis process is more complicated.

[0068] Furthermore, if either the voltage divider circuit assembly 300 or the relay body 100 malfunctions—for example, if the voltage divider element 320 of the voltage divider circuit assembly 300 malfunctions—only the malfunctioning voltage divider element 320 needs to be repaired or replaced, without requiring the entire voltage divider relay to be repaired or replaced. Similarly, if the contacts of the relay body 100 malfunction, only the malfunctioning contacts need to be repaired or replaced, without requiring the entire voltage divider relay to be repaired or replaced. This effectively reduces the maintenance cost of the voltage divider relay.

[0069] The voltage divider relay provided in this embodiment includes a relay body 100, a metal busbar assembly 200, and a voltage divider circuit assembly 300. The metal busbar assembly 200 includes a first metal busbar 210 and a second metal busbar 220. Since the voltage divider circuit assembly 300 is disposed outside the relay body 100, it prevents the voltage divider circuit assembly 300 and the relay body 100 from being placed in the same confined space. This prevents heat accumulation between the voltage divider circuit assembly 300 and the relay body 100, thus preventing damage to components due to excessively high local temperatures in the voltage divider relay and effectively ensuring the operational reliability of the voltage divider relay. Because the voltage divider circuit assembly 300 is disposed outside the relay body 100, it can be flexibly adjusted according to the installation environment, rather than being limited to a specific installation space, thereby improving the versatility of the voltage divider relay. Because the voltage divider circuit assembly 300 is located outside the relay body 100, during fault diagnosis, both the voltage divider circuit assembly 300 and the relay body 100 can be diagnosed separately. Furthermore, after identifying the faulty point, only the faulty voltage divider circuit assembly 300 or the relay body 100 needs to be repaired or replaced, without requiring the entire voltage divider relay to be repaired or replaced, thus effectively reducing the maintenance cost of the voltage divider relay. Moreover, the relay body 100 and the voltage divider circuit assembly 300 can be electrically connected through the first metal busbar 210 and the second metal busbar 220, thereby constructing a voltage divider relay with electrical principles consistent with related technologies. This also facilitates the connection of the voltage divider relay to external circuits without affecting its basic functions.

[0070] Reference Figure 2 and Figure 3 As shown, in one possible implementation, the voltage divider circuit assembly 300 includes a substrate 310 and at least one voltage divider element 320, which is disposed on and electrically connected to the substrate 310. The input terminal of the substrate 310 is electrically connected to a first metal busbar 210, and the output terminal of the substrate 310 is electrically connected to a second metal busbar 220.

[0071] With this configuration, the substrate 310 can be used to carry the voltage divider element 320 and transmit current. The voltage divider element 320 can reduce a higher input voltage to a lower required voltage and balance the potential difference. For example, the voltage divider element 320 can be a capacitor or a resistor. By selecting an appropriate capacitance or resistance value, the voltage level after voltage division can be precisely controlled. There can be one or more resistors, and this embodiment does not limit this.

[0072] The substrate 310 may include a conductive layer, the input end of which is electrically connected to the first metal bus 210, and the output end of which is electrically connected to the second metal bus 220, thereby transmitting current through the conductive layer.

[0073] The substrate 310 may be provided with pads or vias, which are connected to the voltage divider element 320, thereby making the voltage divider element 320 electrically connected to the substrate 310.

[0074] To prevent damage to the voltage divider element 320, in some embodiments, the voltage divider circuit assembly 300 further includes at least one reinforcing member 330, which is connected to the substrate 310. The reinforcing member 330 has a through hole 331, and the voltage divider element 320 is disposed in the through hole 331.

[0075] In this way, the reinforcing member 330 can be surrounded on the outer periphery of the voltage divider element 320, thereby protecting the voltage divider element 320 from damage caused by external impact and ensuring that the voltage divider element 320 can work stably. The voltage divider circuit assembly 300 has high structural reliability and is more suitable for vibration or shock environments.

[0076] After the voltage divider element 320 is placed in the through hole 331 of the reinforcing member 330, adhesive can be applied to the gap between the voltage divider element 320 and the through hole 331 to encapsulate the voltage divider element 320 in the through hole 331, thereby preventing the voltage divider element 320 from contacting other components and causing a short circuit.

[0077] Reference Figures 2 to 4 As shown, in some embodiments, the voltage divider circuit assembly 300 further includes two contacts 340, one contact 340 connecting the substrate 310 and the first metal busbar 210, and the other contact 340 connecting the substrate 310 and the second metal busbar 220.

[0078] It is understandable that the substrate 310 is not convenient to be directly connected to the first metal busbar 210 and the second metal busbar 220. Therefore, in this embodiment, two contacts 340 can be provided on the voltage divider circuit assembly 300. The two contacts 340 are respectively connected to the input terminal and the output terminal of the substrate 310. In this way, when one contact 340 is connected to the first metal busbar 210 and the other contact 340 is connected to the second metal busbar 220, the input terminal of the substrate 310 can be more conveniently connected to the first metal busbar 210 and the output terminal of the substrate 310 can be more conveniently connected to the second metal busbar 220. Then, the voltage divider circuit assembly 300 can be connected in parallel between the two ends of the relay body 100, and the voltage divider relay can be connected to the external circuit.

[0079] For example, contact 340 can be soldered to substrate 310, and first metal busbar 210 and second metal busbar 220 can be soldered to or threaded to contact 340. Contact 340 can be a nickel sheet or copper foil.

[0080] Reference Figure 2 , Figure 3As shown, in some embodiments, at least one contact 340 has a positioning hole 341.

[0081] For example, one contact 340 may have a positioning hole 341, while the other contact 340 may not have a positioning hole 341; alternatively, both contact 340s may have positioning holes 341. This allows for positioning of the contact 340 before welding it to the first metal busbar 210 or the second metal busbar 220, facilitating subsequent welding of the contact 340 to the first metal busbar 210 and the second metal busbar 220.

[0082] Or, refer to Figure 4 As shown, in some embodiments, the contact 340 has a connection hole 342. A threaded fastener can pass through the corresponding connection hole 342 and be threadedly connected to the first metal busbar 210, thereby realizing the mechanical connection and electrical connection between the contact 340 and the first metal busbar 210. Another threaded fastener can pass through the corresponding connection hole 342 and be threadedly connected to the second metal busbar 220, thereby realizing the mechanical connection and electrical connection between the contact 340 and the second metal busbar 220.

[0083] In one possible implementation, contact 340 is welded or threaded to the first metal busbar 210, and contact 340 is welded or threaded to the second metal busbar 220. This configuration enables both mechanical and electrical connections between the two contacts 340 and the metal busbar assembly 200, and provides a high connection strength, thereby improving the operational reliability of the voltage divider relay.

[0084] Reference Figure 2 , Figure 5 and Figure 6 As shown, in one possible implementation, the voltage divider circuit assembly 300 further includes a support 350 connected to the side of the substrate 310 away from the voltage divider element 320.

[0085] It should be noted that the voltage divider element 320 is disposed on one side of the thickness direction of the substrate 310. When the substrate 310 is a flexible circuit board, the substrate 310 is prone to deformation. Therefore, a support member 350 needs to be disposed on the other side of the thickness direction of the substrate 310 to stably support the substrate 310 and the voltage divider element 320. Furthermore, the voltage divider circuit assembly 300 can be mounted to the housing of the relay body 100 through the support member 350, or the voltage divider circuit assembly 300 can be mounted to the battery pack bracket, etc., through the support member 350.

[0086] In some embodiments, the substrate 310 has an I-shaped, L-shaped, or U-shaped shape, and the shape of the support 350 matches the shape of the substrate 310.

[0087] In this way, the substrate 310 can be flexibly adjusted according to the installation environment to improve the versatility of the voltage divider circuit assembly 300. Furthermore, the support member 350 is matched with the substrate 310, enabling the support member 350 to provide good support for the substrate 310.

[0088] In one possible implementation, the support member 350 is made of one of foam, fuzz, and plastic.

[0089] It is understandable that foam, plastic, and plastic all have good cushioning properties. When the support 350 is made of foam, plastic, or plastic, the support 350 can provide good support for the substrate 310. In addition, the support 350 can provide cushioning for the substrate 310, thereby ensuring that the voltage divider circuit assembly 300 is placed outside the relay body 100. The voltage divider circuit assembly 300 has high structural stability, thus making the voltage divider circuit assembly 300 more adaptable to vibration or shock environments.

[0090] In some embodiments, the support member 350 is connected to the relay body 100. Alternatively, in some embodiments, the voltage divider relay further includes a housing, in which the relay body 100 and the voltage divider circuit assembly 300 are both disposed, and the relay body 100 and the support member 350 are both connected to the housing.

[0091] In this way, the voltage divider circuit assembly 300 can be flexibly adjusted to its installation position according to the installation environment, without being limited to a specific installation space, thus improving the versatility of the voltage divider relay.

[0092] Based on the above embodiments, this application also provides a battery management system, which includes a voltage divider relay and a main control component. The voltage divider relay is electrically connected to the main control component, thereby controlling the voltage divider relay through the main control component. When the battery management system is applied to electrical equipment, it can effectively manage the circuit between the battery pack and the load, thereby maintaining the normal operation of the battery pack.

[0093] The structure and working principle of the voltage divider relay have been described in detail in the foregoing embodiments, and will not be repeated here.

[0094] For example, the battery management system may also include a temperature and pressure sampling component, which is electrically connected to the main control component. The temperature and pressure sampling component is used to collect the voltage and temperature of the battery module, and the main control component can regulate the voltage and temperature of the battery module.

[0095] Based on the above embodiments, this application also provides a battery assembly, which includes a voltage divider relay and a battery pack, with the voltage divider relay electrically connected to the battery pack. The structure and working principle of the voltage divider relay have been described in detail in the foregoing embodiments and will not be repeated here.

[0096] The battery pack may include multiple individual cells, which may be connected in series or in parallel. The voltage divider relay may be connected in series or in parallel with the battery pack, and this application does not limit this.

[0097] Based on the above embodiments, this application also provides an electrical device, which includes a load, a battery management system and / or a battery module.

[0098] A battery management system can be used to manage the circuit between the battery pack and the load, or it can be used to manage the circuit between the battery pack and the power source. The battery pack can provide electrical energy to the load.

[0099] For example, the electrical equipment can be a vehicle, and the battery pack can provide electrical energy to the electric motor, which in turn drives the vehicle. The vehicle can be a pure electric vehicle, a range-extended electric vehicle, a hybrid electric vehicle, etc., and can also be any vehicle with a battery pack; this embodiment does not limit this.

[0100] Alternatively, electrical equipment can also include ships, aircraft, electronic terminal equipment, electrical appliances, and energy storage equipment, which will not be described in detail here.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A voltage divider relay, characterized in that, include: Relay body (100); A metal busbar assembly (200), the metal busbar assembly (200) including a first metal busbar (210) and a second metal busbar (220); A voltage divider circuit assembly (300) is disposed outside the relay body (100). The input terminals of the voltage divider circuit assembly (300) and the relay body (100) are both electrically connected to the first metal busbar (210). The output terminals of the voltage divider circuit assembly (300) and the relay body (100) are both electrically connected to the second metal busbar (220). Both the first metal busbar (210) and the second metal busbar (220) are configured to be electrically connected to an external circuit.

2. The voltage divider relay according to claim 1, characterized in that, The voltage divider circuit assembly (300) includes a substrate (310) and at least one voltage divider element (320), the voltage divider element (320) being disposed on one side of the substrate (310) in the thickness direction and electrically connected to the substrate (310); The input terminal of the substrate (310) is electrically connected to the first metal busbar (210), and the output terminal of the substrate (310) is electrically connected to the second metal busbar (220).

3. The voltage divider relay according to claim 2, characterized in that, It also includes at least one reinforcing member (330) connected to the substrate (310); The reinforcing member (330) has a through hole (331), and the voltage divider element (320) is disposed in the through hole (331).

4. The voltage divider relay according to claim 2 or 3, characterized in that, It also includes two contacts (340), one of which connects the substrate (310) and the first metal busbar (210), and the other of which connects the substrate (310) and the second metal busbar (220).

5. The voltage divider relay according to claim 4, characterized in that, At least one of the contact elements (340) has a positioning hole (341).

6. The voltage divider relay according to claim 4, characterized in that, The contact element (340) is welded or threaded to the first metal busbar (210); And / or, the contact (340) is welded or threaded to the second metal busbar (220).

7. The voltage divider relay according to claim 2 or 3, characterized in that, It also includes a support member (350) connected to the side of the substrate (310) opposite to the voltage divider element (320).

8. The voltage divider relay according to claim 7, characterized in that, The substrate (310) has an I-shaped, L-shaped, or U-shaped shape, and the shape of the support (350) matches the shape of the substrate (310).

9. The voltage divider relay according to claim 7, characterized in that, The material of the support member (350) includes one of foam, granulated foam and plastic.

10. The voltage divider relay according to claim 7, characterized in that, The support member (350) is connected to the relay body (100); Alternatively, it may also include a housing, in which the relay body (100) and the voltage divider circuit assembly (300) are both disposed, and the relay body (100) and the support member (350) are both connected to the housing.

11. A battery management system, characterized in that, include: The voltage divider relay as described in any one of claims 1-10; The main control component, wherein the voltage divider relay is electrically connected to the main control component.

12. A battery assembly, characterized in that, include: The voltage divider relay as described in any one of claims 1-10; The battery pack, wherein the voltage divider relay is electrically connected to the battery pack.

13. An electrical appliance, characterized in that, include: load; The battery management system of claim 11, wherein the battery management system is electrically connected to the load, and / or, the battery assembly of claim 12, wherein the battery assembly is electrically connected to the load.

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