BDU device, clamping assembly and battery pack

Abstract

This application relates to a BDU device, a clamping assembly, and a battery pack. The BDU device includes a housing, a BMS module, a fastening assembly, and a clamping assembly. An isolator is disposed within the housing. The BMS module housing includes a support plate supported on the isolator. The fastening assembly securely connects the support plate to the isolator. One end of the clamping assembly is fixed relative to the isolator, and the other end is pressed against the side of the support plate opposite to the isolator. This application effectively solves the problem that manufacturing tolerances and processing errors in the fastening assembly and isolator cannot effectively constrain the degrees of freedom in the support direction of the support plate and isolator. During the operation of an electric vehicle, it effectively prevents jumps in monitored temperature, current, and voltage signals caused by the movement of the support plate, thus improving the reliability of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to BDU devices, clamping components and battery packs. Background Technology

[0002] To improve the utilization of internal space in the battery pack, the BMS module is integrated into the BDU device. The BDU device's casing is divided into upper and lower spaces by an insulating component. The lower space accommodates electronic components such as relays, fuses, and copper busbars, while the BMS module is located in the upper space. The BMS module's support plate rests on the insulating component and is secured to it with bolts. However, existing BDU devices, due to manufacturing tolerances and processing errors, cannot effectively constrain the freedom of the support plate and insulating component along the support direction. This allows the support plate to easily shift, and during electric vehicle operation, the temperature, current, and voltage signals monitored by the BMS module are prone to abrupt changes, reducing the reliability of the battery pack. Utility Model Content

[0003] Therefore, it is necessary to provide a BDU device, a clamping assembly, and a battery pack to address the problem of unreliable fixing between the carrier plate and the separator, which reduces the reliability of the battery pack.

[0004] In a first aspect, this application provides a BDU device, comprising:

[0005] The box contains internal partitions;

[0006] The BMS module, located inside the housing, includes a support plate supported by the isolation component;

[0007] Fastening assembly, which securely connects the carrier plate to the spacer; and

[0008] The clamping assembly has one end fixed relative to the isolator and the other end pressed against the side of the support plate away from the isolator.

[0009] In some embodiments, the clamping assembly includes a clamping member and a locking member, the clamping member including a clamping surface and a snap-fit ​​portion, the clamping surface being pressed against the support plate;

[0010] The locking component includes a rotating mounting part and a snap-fit ​​part connected to each other, and the snap-fit ​​part snaps into the snap-fit ​​part along the pressing direction of the pressing assembly;

[0011] The rotating mounting part is rotatably mounted on the isolator or the box relative to the snap-fit ​​part about a rotation axis parallel to the pressing direction of the pressing assembly, and its position relative to the isolator in the pressing direction can change during rotation;

[0012] The snap-fit ​​part is configured to move along with the rotating mounting part, thereby driving the snap-fit ​​part to move.

[0013] In some embodiments, one of the snap-fit ​​part and the snap-fit ​​part includes a snap-fit ​​hole and a limiting structure, and the other includes a snap-fit ​​connector. The snap-fit ​​hole is open at one end in the pressing direction, and the snap-fit ​​connector passes through the open end of the snap-fit ​​hole and is inserted into the snap-fit ​​hole. Relative rotation about the rotation axis is allowed between the snap-fit ​​hole and the snap-fit ​​connector.

[0014] The limiting structure is used to limit the snap connector to be located within the snap connector hole along the pressing direction.

[0015] In some embodiments, the limiting structure is located on the side wall of the snap-fit ​​hole and forms a through opening, and the limiting structure and the bottom wall of the snap-fit ​​hole are spaced apart to form a snap-fit ​​space.

[0016] The snap-fit ​​connector is configured to be controllably switchable between two states: retracted and extended. In the extended state, the projection of the snap-fit ​​connector along the pressing direction exceeds the projection range of the snap-fit ​​connector along the pressing direction in the retracted state.

[0017] The snap connector located in the snap-fit ​​space is in the unfolded state, and the snap connector is in the retracted state when it passes through the through-hole and enters the snap-fit ​​space.

[0018] In some embodiments, the snap-fit ​​connector includes a plurality of snap protrusions spaced axially around the snap-fit ​​hole, and a deformation space located between all the snap protrusions;

[0019] All of the aforementioned card protrusions are controllable to elastically retract from the unfolded state toward the deformation space to the retracted state, and can elastically recover to retract from the retracted state back to the unfolded state.

[0020] In some embodiments, the clamping assembly further includes an elastic element that elastically deforms along the clamping direction, one end of the elastic element being connected to the clamping element and the other end being connected to the locking element, for providing a preload force to cause the clamping element and the locking element to adhere tightly along the clamping direction; and / or,

[0021] The rotating mounting part includes a threaded structure, which is threadedly connected to the isolator or the housing.

[0022] In some embodiments, one of the snap-fit ​​mating part and the snap-fit ​​part is provided with a protrusion and a snap-fit ​​connector, the snap-fit ​​connector being provided at one end of the protrusion; the other is provided with a snap-fit ​​hole and a limiting structure, the snap-fit ​​connector being inserted into the snap-fit ​​hole, and one end of the connector facing the snap-fit ​​hole abutting against the limiting structure.

[0023] The elastic element is sleeved on the protruding post, with one end abutting against the clamping or locking element where the snap-fit ​​connector is located, and the other end abutting against the end of the limiting structure opposite to the snap-fit ​​connector.

[0024] Secondly, this application provides a clamping assembly, comprising:

[0025] A clamping component includes a clamping surface and a snap-fit ​​portion, wherein the clamping surface is located at one end of the clamping assembly in the pressing direction;

[0026] A locking component, comprising a rotating mounting portion and a snap-fit ​​portion connected together, wherein the snap-fit ​​portion engages with the snap-fit ​​portion along the pressing direction;

[0027] The rotating mounting part is configured to be rotatable relative to the snap-fit ​​part about a rotation axis parallel to the pressing direction, and its position can change in the pressing direction during rotation. The snap-fit ​​mating part is configured to move with the rotating mounting part, thereby driving the snap-fit ​​part to move.

[0028] In some embodiments, the clamping assembly further includes an elastic element that elastically deforms along the pressing direction, one end of the elastic element being connected to the clamping element and the other end being connected to the locking element, for providing a preload force that causes the clamping element and the locking element to adhere tightly along the pressing direction.

[0029] Thirdly, this application provides a battery pack, including a housing and a BDU device as described in the first aspect, wherein the BDU device is disposed within the housing.

[0030] The aforementioned BDU device, clamping assembly, and battery pack are fixedly connected to the carrier plate of the isolation component and the BMS module via the fastening assembly. The clamping assembly also constrains the degree of freedom of the carrier plate and the isolation component along the support direction, preventing the carrier plate from moving up and down relative to the isolation component. This solves the problem that the manufacturing tolerances and processing errors of the fastening assembly and the isolation component cannot effectively constrain the degree of freedom of the carrier plate and the isolation component in the support direction. During the operation of the electric vehicle, this effectively prevents the monitoring temperature, current, and voltage signals from jumping due to the movement of the carrier plate, thus improving the reliability of the battery pack. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 This is a schematic diagram of the internal structure of a BDU device according to some embodiments.

[0033] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0034] Figure 3 for Figure 1 A top view of the BDU device shown.

[0035] Figure 4 for Figure 3 Sectional view at point BB.

[0036] Figure 5 This is a schematic diagram of the external shape of the clamping assembly in some embodiments.

[0037] Figure 6 for Figure 5 The diagram shows the internal structure of the clamping assembly.

[0038] Figure 7 for Figure 5 The diagram shows an exploded view of the clamping assembly.

[0039] Figure 8 for Figure 5 The diagram shows the structure of the clamping component in the clamping assembly.

[0040] Figure 9 for Figure 5 The diagram shows the structure of the locking element in the clamping assembly.

[0041] The reference numerals in the detailed embodiments are as follows:

[0042] 100. BDU device; 10. Box body; 11. Isolator; 12. Mounting ear; 20. BMS module; 21. Bearing plate; 30. Fastening assembly; 40. Pressing assembly; F. Pressing direction; 41. Pressing component; 41a. Pressing surface; 41b. Snap-fit ​​part; 42. Locking component; 42a. Rotary mounting part; a1. Threaded structure; 42b. Snap-fit ​​mating part; k. Snap-fit ​​connector; k1. Snap-fit ​​protrusion; k2. Deformation space; k3. First inclined surface; j. Snap-fit ​​hole; j1. Open end; j2. Snap-fit ​​space; r. Limiting structure; r1. Limiting protrusion; r2. Through-hole; r3. Second inclined surface; t. Protrusion; 43. Elastic component. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that, where they appear, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, where applicable, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that, if an element is described as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is described as "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] This application addresses the problem that when a BMS module is integrated into a BDU device, its carrier plate is not securely fixed to the isolation component within the BDU device, which reduces the reliability of the battery pack. The application provides a BDU device, a clamping assembly, and a battery pack.

[0050] The battery pack mentioned in this application includes individual battery cells and a BDU (Battery Energy Distribution Unit). Multiple individual battery cells form a battery pack. One or more battery packs are configured within the battery pack. The BDU is directly connected to the battery pack via a high-voltage copper busbar and is responsible for the distribution, protection, and management of the battery pack's electrical energy, used to control the charging and discharging process of the electric vehicle equipped with the battery pack.

[0051] The BDU device in this embodiment integrates a BMS module. The BMS (Battery Management System) module is an electronic system for managing the battery, primarily monitoring its status to prevent overcharging, over-discharging, and overheating, thereby extending the battery's lifespan. The BMS module ensures the battery operates within safe limits and optimizes the charging and discharging process by monitoring parameters such as voltage, current, and temperature in real time. In one embodiment, the BMS module typically includes a main control unit responsible for data acquisition and processing to monitor battery status, an equalization module for equalizing the charge between individual battery cells, a high-voltage controller for monitoring the safety of the high-voltage battery, a status indicator unit for displaying the battery's operating status and health condition, and a communication module for communicating with external devices. The carrier board mentioned in this embodiment can be a printed circuit board that carries the various circuits and / or electronic components in the BMS module. The carrier board is located at the bottom of the BMS module and is used to install the BMS module within the BDU device.

[0052] In one embodiment, in addition to the BMS module, the BDU device also includes components such as relays, fuses, and current acquisition elements. The specific structure of the BDU device and BMS module can refer to conventional configurations, and this application does not impose specific limitations on them.

[0053] A battery cell is the smallest unit in a battery pack where electrochemical reactions take place; it can be a secondary or primary battery. Battery cells can be lithium-ion, sodium-ion, magnesium-ion, or solid-state batteries, but are not limited to these types. Battery cells can be cylindrical, flat, cuboid, or other shapes.

[0054] In some embodiments, the battery cell includes a housing, an end cap, and an electrode assembly. The housing and the end cap together form an internal space for accommodating the electrode assembly. Specifically, a receiving cavity may be formed within the housing, with at least one end open. The end cap closes to the open end of the housing to seal the receiving cavity, and the electrode assembly is mounted within the receiving cavity. The housing may be, but is not limited to, a metal housing, such as an aluminum housing or a steel housing.

[0055] Electrode assemblies typically include a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. An electrolyte can be injected into the battery cell, wetting the interior of the electrode assembly and providing ion migration pathways for electrochemical reactions, as well as conducting electricity. Electrode assemblies can be in the form of wound, stacked, etc. One or more electrode assemblies can be installed within a single battery cell.

[0056] The BDU device in the embodiments of this application will be described in detail below.

[0057] Figure 1 This is a schematic diagram of the internal structure of a BDU device 100 according to some embodiments. Figure 2 for Figure 1 Enlarged view of point A in the middle. Figure 3 for Figure 1 The top view of the BDU device 100 shown. Figure 4 for Figure 3 Sectional view at point BB.

[0058] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, the BDU device 100 includes a housing 10, a BMS module 20, a fastening assembly 30, and a clamping assembly 40. An isolator 11 is disposed inside the housing 10. The BMS module 20, inside the housing 10, includes a support plate 21 supported on the isolator 11. The fastening assembly 30 fastens the support plate 21 to the isolator 11. One end of the clamping assembly 40 is fixedly disposed relative to the isolator 11, and the other end is pressed against the side of the support plate 21 opposite to the isolator 11.

[0059] The housing 10 is used to house the internal components / parts of the BDU device 100. A carrier plate 21 is located at the bottom of the BMS module 20 and is used to mount the BMS module 20 within the BDU device 100. The carrier plate 21 can be a printed circuit board that carries the circuits and / or electronic components within the BMS module 20. A separator 11 is disposed within the housing 10, dividing the housing 10 into two receiving spaces. These two receiving spaces can be independent of each other or interconnected, with the BMS module 20 located within one of these receiving spaces. In one example, the two receiving spaces are arranged vertically. In another example, the two receiving spaces are arranged horizontally.

[0060] The spacer 11 can be connected separately or integrally with the housing 10. When the spacer 11 is integrally connected with the housing 10, the accommodating spaces separated by the spacer 11 are interconnected. The spacer 11 may include a continuous annular partition surrounding the housing 10 or multiple spacer protrusions spaced apart circumferentially around the housing 10. When the spacer 11 is separately connected with the housing 10, the spacer 11 can be a partition that separates two accommodating spaces into independent partitions. Those skilled in the art can flexibly design the arrangement of the spacer 11 and the housing 10.

[0061] In a specific example, the housing 10 includes a bottom box and a lid. The bottom box forms an open space at one end, which serves as a lower receiving space. The lid closes onto the open end of the bottom box, forming an upper receiving space. A spacer 11 is disposed at the open end of the bottom box. The spacer 11 can be a single plate closing the open end of the bottom box, or it can be an annular plate circumferentially arranged around the open end of the bottom box. When assembling the BDU device 100, the lid is opened, the spacer 11 is removed, or after the electronic components in the lower receiving space are installed in place using the annular hole in the center of the spacer 11, the spacer 11 is reinstalled into the bottom box, or the BMS module 20 is directly mounted on the spacer 11 of the bottom box via its carrier plate 21. Finally, the lid is closed.

[0062] The support plate 21 is supported on the isolation member 11 and fixed to the isolation member 11 by the fastening assembly 30, thereby fixing it to the box body 10. The fastening assembly 30 may include screws, bolts, pins, rivets, clips, and other components that fix the isolation member 11 and the support plate 21. One end of the clamping assembly 40 is fixed to the isolation member 11, and the other end is pressed against the side of the support plate 21 away from the isolation member 11, which can apply a clamping force to the support plate 21 to prevent the support plate 21 from displacing relative to the isolation member 11 in the support direction. The pressing direction F of the clamping assembly 40 is the support direction. In practical applications, if the isolation member 11 is divided into two receiving spaces, the support plate 21 is arranged on the isolation member 11 in the vertical direction, and the pressing direction F is the vertical direction.

[0063] The aforementioned BDU device 100 is fixedly connected to the isolation member 11 and the support plate 21 of the BMS module 20 via a fastening assembly 30. The clamping assembly 40 is used to constrain the degree of freedom of the support plate 21 and the isolation member 11 in the support direction, preventing the support plate 21 from moving up and down relative to the isolation member 11. This solves the problem that the manufacturing tolerances and processing errors of the fastening assembly 30 and the isolation member 11 cannot effectively constrain the degree of freedom of the support plate 21 and the isolation member 11 in the support direction. During the operation of the electric vehicle, it effectively prevents the monitoring temperature, current and voltage signals from jumping due to the movement of the support plate 21, thereby improving the reliability of the battery pack.

[0064] Some possible implementation schemes for the clamping assembly 40 will be provided below, but the configuration schemes for the clamping assembly 40 are not limited to these. Those skilled in the art can make conventional settings, as long as the carrier plate 21 can be clamped onto the spacer 11.

[0065] Figure 5 This is a schematic diagram of the external shape of the clamping assembly 40 in some embodiments. Figure 6 for Figure 5 The diagram shows the internal structure of the clamping assembly 40. Figure 7 for Figure 5 An exploded view of the clamping assembly 40 shown.

[0066] In some embodiments, combined with Figure 5 , Figure 6 and Figure 7 The clamping assembly 40 includes a clamping member 41 and a locking member 42. The clamping member 41 includes a clamping surface 41a and a locking portion 41b, with the clamping surface 41a pressing against the support plate 21. The locking member 42 includes a connected rotating mounting portion 42a and a locking engagement portion 42b, with the locking engagement portion 42b engaging with the locking portion 41b along the clamping direction F of the clamping assembly 40. The rotating mounting portion 42a is rotatably mounted on the isolation member 11 or the housing 10 relative to the locking portion 41b about a rotation axis parallel to the clamping direction F, and its position relative to the isolation member 11 in the clamping direction F can change during rotation. The locking engagement portion 42b is configured to move with the rotating mounting portion 42a, thereby driving the locking portion 41b to move.

[0067] In one example, the clamping member 41 includes a pressing portion connected to the snap-fit ​​portion 41b, which is located at one end of the pressing portion. The pressing surface is located at the other end of the pressing portion and is positioned on the same side of the pressing portion facing the support plate 21 as the snap-fit ​​portion 41b. The edge of the housing 10 protrudes outwards and is provided with mounting ears 12. The mounting ears 12, the housing 10, and the spacer 11 are integrally connected, and the locking member 42 is mounted on the mounting ears 12.

[0068] The rotating mounting part 42a is rotatably mounted on the isolator 11 or the housing 10. Since the isolator 11 and the housing 10 are relatively fixed, the rotating mounting part 42a also rotates relative to the isolator 11 when it is rotatably mounted on the housing 10. The rotation axis of the rotating mounting part 42a is parallel to the pressing direction F of the pressing assembly 40. In practical applications, if the pressing direction F is vertical, the rotation axis is a vertical line. During rotation, the rotating mounting part 42a can also move synchronously in the pressing direction F. The snap-fit ​​part 42b and the snap-fit ​​part 41b snap-fit ​​together in the pressing direction F. After they are inserted into place facing each other in the pressing direction F, their relative positions in the pressing direction F are fixed. When the rotating mounting part 42a moves in the pressing direction F, the pressing member 41 can move synchronously in the same direction as the rotating mounting part 42a in the pressing direction F with the cooperation of the snap-fit ​​part 42b and the snap-fit ​​part 41b.

[0069] When the rotating mounting part 42a rotates, the snap-fit ​​part 41b does not rotate with the rotating mounting part 42a, but moves with the rotating mounting part 42a in the pressing direction F. One scenario is that the snap-fit ​​part 41b and the snap-fit ​​mating part 42b can rotate relative to each other, with the snap-fit ​​mating part 42b rotating with the mounting part 42a fixed. When the snap-fit ​​mating part 42b rotates with the rotating mounting part 42a, the snap-fit ​​part 41b is allowed to remain stationary, and when the snap-fit ​​mating part 42b moves according to the rotating mounting part 42a, it drives the snap-fit ​​part 41b to move. In this case, by reasonably setting the dimensions of the snap-fit ​​position, a gap exists between the circumferential sidewall of the snap-fit ​​part 41b around the rotation axis and the snap-fit ​​mating part 42b. This gap allows the snap-fit ​​part 41b not to rotate with the snap-fit ​​mating part 42b, and allows the snap-fit ​​part 41b and the snap-fit ​​mating part 42b to match and snap-fit ​​in the direction of the rotation axis, so that the snap-fit ​​part 41b moves with the snap-fit ​​mating part 42b.

[0070] Another scenario is that the snap-fit ​​part 42b is fixedly connected to the snap-fit ​​part 41b, with no relative rotation or movement between them, while the snap-fit ​​part 42b and the rotary mounting part 42a can rotate relative to each other, but there is no relative movement along the pressing direction F. For example, a bearing is provided in the rotary mounting part 42a, and the snap-fit ​​part 42b is mounted in the rotary mounting part 42a through the bearing, allowing the snap-fit ​​part 42b not to rotate with the rotary mounting part 42a.

[0071] In practical applications, after the locking member 42 is installed at the mounting position via its rotating mounting part 42a, the snap-fit ​​part 41b of the pressing member 41 is inserted and snapped into the snap-fit ​​mating part 42b on the locking member 42 along the pressing direction F, with the pressing surface facing the side of the support plate 21 away from the partition. Then, the rotating mounting part 42a is rotated. When the rotating mounting part 42a rotates, since the snap-fit ​​part 41b does not rotate, the pressing member 41 will not rotate relative to the support plate 21, maintaining the state where the pressing surface faces the support plate 21. As the snap-fit ​​part 41b moves with the rotating mounting part 42a, it can drive the pressing surface to gradually approach and press against the support plate 21 until it is pressed in place, at which point the rotation stops.

[0072] The part on the isolator 11 or the housing 10 that is rotatably connected to the rotary mounting part 42a is called the mounting part. In order to realize the rotation and synchronous movement of the rotary mounting part 42a, a helical guide rail can be provided on one of the mounting part and the rotary mounting part 42a, and a slider that cooperates with the helical guide rail can be provided on the other. When the slider slides along the helical guide rail, the relative rotation and axial relative movement between the rotary mounting part 42a and the mounting part are realized.

[0073] In a preferred embodiment, refer to Figure 5The rotating mounting part 42a includes a threaded structure a1, which is threadedly connected to the isolator 11 or the housing 10. For example, an internal threaded hole is provided on the isolator 11 or the housing 10, and the threaded structure a1 is an external threaded post that mates with the internal threaded hole, allowing the rotating mounting part 42a to rotate while also moving in the pressing direction F. In this case, the rotating mounting part 42a has a simple structure and reliable connection and movement.

[0074] In one specific embodiment, the rotating mounting portion 42a and the snap-fit ​​portion 42b are fixedly connected, such as being integrally formed. The snap-fit ​​portion 42b is rotatably disposed relative to the snap-fit ​​portion 41b. When the rotating mounting portion 42a is rotated, the snap-fit ​​portion 42b rotates and moves with the rotating mounting portion 42a, while the snap-fit ​​portion 41b does not rotate and moves along the pressing direction F with the snap-fit ​​portion 42b.

[0075] Figure 8 for Figure 5 The diagram shows the structure of the clamping member 41 in the clamping assembly 40. Figure 9 for Figure 5 The diagram shows the structure of the locking element 42 in the clamping assembly 40.

[0076] In some embodiments, refer to Figure 8 and Figure 9 One of the snap-fit ​​parts 42b and 41b includes a snap-fit ​​hole j and a limiting structure r, and the other includes a snap-fit ​​connector k. One end of the snap-fit ​​hole j is open in the pressing direction F. The snap-fit ​​connector k passes through the open end j1 of the snap-fit ​​hole j and is inserted into the snap-fit ​​hole j. Relative rotation about the rotation axis is allowed between the snap-fit ​​hole j and the snap-fit ​​connector k. The limiting structure r is used to confine the snap-fit ​​connector k within the snap-fit ​​hole j along the pressing direction F.

[0077] The limiting structure r can be a circumferential protrusion arranged in a ring around the snap-fit ​​hole j, or it can include multiple limiting protrusions r1 spaced apart along the ring direction. The snap-fit ​​connector k can be inserted into the snap-fit ​​hole j through the open end j1 of the snap-fit ​​hole j.

[0078] The limiting structure r can abut against one end of the snap-fit ​​connector k located in the snap-fit ​​hole j, facing the open end j1 of the snap-fit ​​hole j. The other end of the snap-fit ​​connector k is limited by the bottom wall of the snap-fit ​​hole j. In this case, the limiting structure r can be set on the hole wall of the snap-fit ​​hole j, and spaced apart from the bottom wall of the snap-fit ​​hole j to form a snap-fit ​​space j2 for accommodating the snap-fit ​​connector k. Alternatively, the limiting structure r can abut against both ends of the snap-fit ​​connector k located in the snap-fit ​​hole j in the pressing direction F. In this case, two limiting structures r can be arranged at intervals on the hole wall of the snap-fit ​​hole j along the pressing direction F, and the snap-fit ​​space j2 for accommodating the snap-fit ​​connector k is formed by the gap between the two limiting structures r.

[0079] In this way, the locking part 42b and the locking part 41b can rotate relative to each other and move synchronously along the pressing direction F. The structure is simple and easy to implement.

[0080] Specifically, in the embodiments, refer to Figure 8 and Figure 9 and combined Figure 6 The limiting structure r is located on the side wall of the snap-fit ​​hole j and encloses a through-hole r2. The limiting structure r and the bottom wall of the snap-fit ​​hole j form a snap-fit ​​space j2. The snap-fit ​​connector k is constructed to be controllably switchable between two states: retracted and extended. When the snap-fit ​​connector k is in the extended state, its projection along the pressing direction F exceeds the projection range of the snap-fit ​​connector k in the retracted state along the pressing direction F. The snap-fit ​​connector k located in the snap-fit ​​space j2 is in the extended state, and when the snap-fit ​​connector k passes through the through-hole r2 and enters the snap-fit ​​space j2, it is in the retracted state.

[0081] When the connector k is inserted into the locking hole j along the pressing direction F, the connector k passes through the through-hole r2. The through-hole r2 has a small diameter. Under the pressure of the through-hole r2, the connector k can automatically switch from an unfolded state to a retracted state by manual operation or by the pressure of the through-hole r2, so as to pass through the through-hole r2. After entering the locking space j2, the connector k switches back to the unfolded state and is confined within the locking space j2.

[0082] Regarding the scheme for enabling manual switching of the snap-fit ​​connector k between the unfolded and retracted states, those skilled in the art can make conventional settings, which are not limited here. For example, the snap-fit ​​connector k includes multiple snap-fit ​​pieces, each snap-fit ​​piece is connected to an operating lever, the operating lever controls the snap-fit ​​pieces to switch between the unfolded and retracted states, and the snap-fit ​​pieces are kept in the unfolded state by fixing the state of the operating lever.

[0083] At this point, by switching the state of the connector k, the connector k can be easily snapped into the snap-in space j2, making it easy to operate and achieve the snap-in of the connector k and the snap-in hole j.

[0084] Further in the embodiments, combined with Figure 8 The snap-fit ​​connector k includes multiple snap protrusions k1 spaced at intervals along an axis surrounding the snap-fit ​​hole j, and a deformation space k2 located between all the snap protrusions k1. All the snap protrusions k1 are controllable to elastically retract from the unfolded state toward the deformation space k2 to the retracted state, and can elastically recover to retract from the retracted state back to the unfolded state.

[0085] In practical applications, when the connector k passes through the insertion opening r2, under the pressure of the insertion opening r2, each locking protrusion k1 can simultaneously deform towards the deformation space k2 and switch to the closed state, so that the connector k can pass smoothly through the insertion opening r2. When each locking protrusion k1 is in the locking space j2, the pressure disappears, and under the elastic recovery of each locking protrusion k1, it automatically switches back to the unfolded state.

[0086] In this way, no manual operation is required, making it simpler and more convenient, and improving the assembly efficiency of the clamping component 40.

[0087] In some embodiments, combined with Figure 8 and Figure 9 Understand that each card protrusion k1 includes a first inclined surface k3 that is inclined in the pressing direction F, and the limiting structure r includes a second inclined surface r3 that forms a through hole r2. The second inclined surface r3 is adapted to the shape of the first inclined surface k3 and is used to guide the card protrusion k1 toward the carding space j2 to pass through the through hole r2.

[0088] In practical applications, when the card connector k passes through the through-hole r2, with the cooperation of the first inclined surface k3 and the second inclined surface r3, each card protrusion k1 can smoothly enter the through-hole r2 and be squeezed and closed by the through-hole r2.

[0089] At this point, the installation efficiency of the connector k can be improved, and the connector k and the connector hole j can be connected more easily.

[0090] In some embodiments, refer to Figure 6 The pressing assembly 40 also includes an elastic element 43 that elastically deforms along the pressing direction F. One end of the elastic element 43 is connected to the pressing element 41, and the other end is connected to the locking element 42, which is used to provide a preload force to make the pressing element 41 and the locking element 42 stick together along the pressing direction F.

[0091] Understandably, the locking member 42 can rotate relative to the pressing member 41 through its rotating mounting part 42a, but the relative position of the two in the pressing direction F is required to remain unchanged. When the rotating mounting part 42a moves along the pressing direction F, the pressing member 41 moves synchronously and in the same direction with the rotating mounting part 42a through the cooperation of the snap-fit ​​part 41b and the snap-fit ​​mating part 42b, so that when the rotating mounting part 42a is in motion, the pressing surface 41a on the pressing member 41 presses the bearing plate 21.

[0092] Under the action of the elastic member 43, when the clamping member 41 and the locking member 42 are pressed together in the pressing direction F, the relative positions of the clamping member 41 and the locking member 42 in the pressing direction F remain unchanged, so that the clamping member 41 can follow the locking member 42 to move along the pressing direction F with high precision, eliminating the assembly gap of the mating surfaces (i.e. the surfaces of the snap-fit ​​mating part 42b and the snap-fit ​​part 41b that mate with each other in the pressing direction F) caused by manufacturing errors of the two, and further improving the problem of the bearing plate 21 moving along the pressing direction F.

[0093] Specifically, in the embodiments, combined with Figure 6 and Figure 7 Understanding that one of the snap-fit ​​parts 42b and 41b has a protrusion and a snap-fit ​​connector k, with the snap-fit ​​connector k located at one end of the protrusion t, and the other has a snap-fit ​​hole j and a limiting structure r. The snap-fit ​​connector k is inserted into the snap-fit ​​hole, and its open end j1 facing the snap-fit ​​hole j abuts against the limiting structure r. The elastic member 43 is sleeved on the protrusion t, with one end connected to the clamping member 41 or locking member 42 where the snap-fit ​​connector k is located, and the other end abutting against the end of the limiting structure r opposite to the snap-fit ​​connector k.

[0094] The elastic element 42 can be a spring, a rubber sleeve, an elastic air bladder, or other structures. At this time, the clamping element 41 and the locking element 42 are pressed together with the locking part 41b in the pressing direction F through the locking engagement part 42b. Specifically, the end surface of the locking head k facing the open end j1 of the locking hole j is the locking interface, and the end surface of the limiting structure r that abuts against the locking head k is also the locking interface. The locking interfaces of the two are pressed together in the pressing direction F under the pre-tightening force provided by the elastic element 43.

[0095] In this way, the elastic element 43 is fitted outside the protrusion t. The protrusion t can correct the shape of the elastic element 43 and guide the elastic element 43 to be set along the pressing direction F, making the installation of the elastic element 43 more stable.

[0096] Understandably, as long as the solutions do not conflict, the solutions of each embodiment can be freely combined to obtain more embodiments.

[0097] In one specific embodiment of this application, the clamping assembly 40 on the BDU device 100 includes the aforementioned clamping member 41 and locking member 42. The clamping member 41 includes a pressing surface and a snap-fit ​​portion 41b. The snap-fit ​​portion 41b includes a protrusion t and a snap-fit ​​connector k disposed at one end of the protrusion t. The locking member 42 includes a threaded structure a1 serving as a rotating mounting portion 42a and a snap-fit ​​hole j. The threaded structure a1 surrounds the periphery of the snap-fit ​​hole j. A limiting structure r is provided on the side wall of the snap-fit ​​hole j. The limiting structure r and the bottom wall of the snap-fit ​​hole j are spaced apart to form a snap-fit ​​space j2. The snap-fit ​​connector k snaps into the snap-fit ​​space j2. When the elastic member 43 is located in the snap-fit ​​hole j and abuts against the clamping member 41 and the limiting structure r, the snap-fit ​​connector k and the limiting structure r are pressed together under the preload of the elastic member 43, and there is a gap between the snap-fit ​​connector k and the side wall of the snap-fit ​​hole j to allow the locking member 42 located in the snap-fit ​​hole j to rotate relative to itself.

[0098] In addition, this application embodiment also provides a clamping component 40, referring to... Figures 5 to 9The assembly includes a clamping member 41 and a locking member 42. The clamping member 41 includes a clamping surface 41a and a locking portion 41b, with the clamping surface 41a located at one end in the pressing direction F of the pressing assembly. The locking member 42 includes a fixedly connected rotating mounting portion 42a and a locking engagement portion 42b, with the locking engagement portion 42b engaging with the locking portion 41b along the pressing direction F. The rotating mounting portion 42a is configured to rotate relative to the locking portion 41b about a rotation axis parallel to the pressing direction F, and its position can change in the pressing direction F during rotation. The locking engagement portion 42b is configured to move with the rotating mounting portion 42a, thereby driving the locking portion 41b to move.

[0099] When the clamping assembly 40 is applied to the BDU device 100, its locking member 42 is rotatably mounted on the partition or housing 10, and its pressing surface is pressed against the support plate 21. By rotating the locking member 42, the pressing surface can be pressed firmly against the support plate 21, restricting the degree of freedom of the support plate 21 and the partition in the support direction. This effectively prevents the monitoring temperature, current, and voltage signals from jumping due to the movement of the support plate 21, thus improving the reliability of the battery pack. Moreover, by rotating the locking member 42, the pressing surface can be effectively pressed and the support plate 21 can be locked onto the separator 11, which is convenient, time-saving, and labor-saving.

[0100] The construction methods and functions of the clamping member 41, locking member 42, snap-fit ​​part 42b, and snap-fit ​​part 41b can be referred to the description above, and will not be repeated here. The clamping assembly 40 can be the technical solution of the clamping assembly 40 in any of the above embodiments, and has the beneficial effects of the above embodiments. For example, in one embodiment, the clamping assembly 40 further includes an elastic member 43 that elastically deforms along the pressing direction F. One end of the elastic member 43 is connected to the clamping member 41, and the other end is connected to the locking member 42, which is used to provide a preload force to make the clamping member 41 and the locking member 42 fit together along the pressing direction F. The provision of the elastic member 43 can eliminate the manufacturing errors of the clamping member 41 and the locking member 42 in the pressing direction F, ensure that the two fit tightly in the pressing direction F, and reduce the movement of the bearing plate 21 in the pressing direction F.

[0101] In addition, this application also provides a battery pack, including a housing and the BDU device 100 from any of the above embodiments, wherein the BDU device 100 is disposed within the housing. This battery pack includes all the aforementioned beneficial effects.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A BDU apparatus, characterized by, include: The box body (10) has an isolation component (11) inside; The BMS module (20) is located inside the housing (10) and includes a support plate (21) supported by the isolation member (11); Fastening assembly (30) securely connects the support plate (21) to the spacer (11); and A clamping assembly (40) is fixed at one end relative to the isolation member (11) and at the other end pressed against the side of the support plate (21) away from the isolation member (11).

2. The BDU device of claim 1, wherein, The clamping assembly (40) includes a clamping member (41) and a locking member (42). The clamping member (41) includes a clamping surface (41a) and a snap-fit ​​portion (41b). The clamping surface (41a) is pressed against the bearing plate (21). The locking member (42) includes a rotating mounting part (42a) and a snap-fit ​​part (42b) connected to each other. The snap-fit ​​part (42b) is snapped into the snap-fit ​​part (41b) along the pressing direction (F) of the pressing assembly (40). The rotating mounting part (42a) is rotatably mounted on the isolator (11) or the box (10) relative to the snap-fit ​​part (41b) about a rotation axis parallel to the pressing direction (F) of the pressing assembly (40), and can change its position relative to the isolator (11) in the pressing direction (F) during rotation; The snap-fit ​​part (42b) is configured to move along with the rotating mounting part (42a), thereby driving the snap-fit ​​part (41b) to move.

3. The BDU device according to claim 2, characterized in that, One of the snap-fit ​​part (42b) and the snap-fit ​​part (41b) includes a snap-fit ​​hole (j) and a limiting structure (r), and the other includes a snap-fit ​​connector (k). The snap-fit ​​hole (j) is open at one end in the pressing direction (F). The snap-fit ​​connector (k) passes through the open end (j1) of the snap-fit ​​hole (j) and is inserted into the snap-fit ​​hole (j). The snap-fit ​​hole (j) and the snap-fit ​​connector (k) are allowed to rotate relative to each other about the rotation axis. The limiting structure (r) is used to limit the snap-fit ​​connector (k) to be located within the snap-fit ​​hole (j) along the pressing direction (F).

4. The BDU device according to claim 3, characterized in that, The limiting structure (r) is located on the side wall of the snap-fit ​​hole (j) and encloses a through opening (r2). The limiting structure (r) and the bottom wall of the snap-fit ​​hole (j) are spaced apart to form a snap-fit ​​space (j2). The snap-fit ​​connector (k) is configured to be controllably switchable between two states: retracted and extended. The projection of the snap-fit ​​connector (k) in the extended state along the pressing direction (F) exceeds the projection range of the snap-fit ​​connector (k) in the retracted state along the pressing direction (F). The snap connector (k) located in the snap-fit ​​space (j2) is in the unfolded state, and the snap connector (k) is in the retracted state when it passes through the through-hole (r2) and enters the snap-fit ​​space (j2).

5. The BDU device according to claim 4, characterized in that, The snap-fit ​​connector (k) includes a plurality of snap protrusions (k1) spaced apart along the axis surrounding the snap-fit ​​hole (j), and a deformation space (k2) located between all the snap protrusions (k1); All of the card protrusions (k1) are controllable to elastically retract from the unfolded state toward the deformation space (k2) to the retracted state, and can elastically recover to retract from the retracted state back to the unfolded state.

6. The BDU device according to any one of claims 2-5, characterized in that, The clamping assembly (40) further includes an elastic element (43) that elastically deforms along the pressing direction (F), one end of the elastic element (43) being connected to the clamping member (41) and the other end being connected to the locking member (42), for providing a preload force to cause the clamping member (41) and the locking member (42) to adhere tightly along the pressing direction (F); and / or, The rotating mounting part (42a) includes a threaded structure (a1) which is threadedly connected to the isolation member (11) or the housing (10).

7. The BDU device according to claim 6, characterized in that, One of the snap-fit ​​part (42b) and the snap-fit ​​part (41b) is provided with a protrusion (t) and a snap-fit ​​connector (k), with the snap-fit ​​connector (k) located at one end of the protrusion (t); the other is provided with a snap-fit ​​hole (j) and a limiting structure (r), with the snap-fit ​​connector (k) inserted into the snap-fit ​​hole (j), and its open end (j1) facing the snap-fit ​​hole (j) abutting against the limiting structure (r); The elastic element (43) is sleeved on the protrusion (t), with one end abutting against the clamping element (41) or the locking element (42) where the snap-fit ​​connector (k) is located, and the other end abutting against the end of the limiting structure (r) away from the snap-fit ​​connector (k).

8. A clamping assembly (40), characterized in that, include: The clamping member (41) includes a clamping surface (41a) and a snap-fit ​​portion (41b), wherein the clamping surface (41a) is located at one end of the clamping assembly (40) in the pressing direction (F); The locking member (42) is connected to the rotating mounting part (42a) and the snap-fit ​​part (42b), wherein the snap-fit ​​part (42b) is snapped into the snap-fit ​​part (41b) along the pressing direction (F); The rotating mounting part (42a) is configured to be rotatable relative to the snap-fit ​​part (41b) about a rotation axis parallel to the pressing direction (F), and its position can change in the pressing direction (F) during rotation. The snap-fit ​​mating part (42b) is configured to move with the rotating mounting part (42a) and drive the snap-fit ​​part (41b) to move.

9. The clamping assembly (40) according to claim 8, characterized in that, The pressing assembly (40) further includes an elastic element (43) that elastically deforms along the pressing direction (F). One end of the elastic element (43) is connected to the pressing member (41), and the other end is connected to the locking member (42). It is used to provide a preload force that causes the pressing member (41) and the locking member (42) to adhere tightly along the pressing direction (F).

10. A battery pack, characterized in that, It includes a housing and a BDU device as described in any one of claims 1-7, wherein the BDU device is disposed within the housing.

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