Protective covers, Battery Disconnect Unit (BDU) cases, BDU and battery pack cases

Abstract

To provide a protective cover, a BDU case, and a BDU, and a battery pack case that can guarantee the electrical safety performance and service life of a battery disconnect unit (BDU).SOLUTION: A protective cover includes a water shield 11 and a side edge protection 12, the water shield 11 includes a water shield plate 111, the water shield plate 111 is provided with a water shield flange 1111, and the water shield flange 1111 is configured to engage with the top cover of the BDU such that the water shield plate 111 closes the upper end opening of the first cutout of the top cover of the BDU. The side edge protection 12 is provided on the side of the water shield 11, engages with the base of the BDU, and can cover a part of the side edge opening of the first cutout.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This disclosure claims priority to Chinese patent application No. 202211560478.0 filed on December 7, 2022 with the China Patent Office, and claims priority to Chinese patent application No. 202223270001.7 filed on December 7, 2022 with the China Patent Office, the entire contents of which are incorporated herein by reference.

[0002] The present invention is in the field of power batteries, mechanical design and electrical engineering, and relates to, for example, protective covers, Battery Disconnect Unit (BDU) cases, BDUs and battery pack cases. [Background technology]

[0003] A battery pack case (pack case) is a case for mounting a plurality of power battery modules, and the power battery modules are mounted to form a power battery pack. The power battery pack is applied to an electric vehicle and provides driving force to the electric vehicle to drive the electric vehicle.

[0004] Generally, a BDU is installed inside the pack case. The BDU is an internal functional unit designed for a power battery pack and is used as a distribution box for the power battery pack. When an error occurs in the power battery pack system, the BDU can cut off the internal current of the power battery pack to ensure the safety of the power battery pack system.

[0005] A BDU usually includes a BDU case and electrical components mounted inside the BDU case. In order for the electrical components of the BDU to transmit signals to other functional components, some of the connection terminals of the electrical components must be exposed to the BDU case, and therefore an escape hole is provided in the BDU case. Condensed water adheres to the inner ceiling surface of the pack case, and when the BDU is mounted inside the pack case, the condensed water may fall through the escape hole onto the exposed connection terminals, causing damage to the BDU or creating safety concerns. Summary of the Invention

[0006] The present invention provides a protective cover, a BDU case, a BDU, and a battery pack case that can solve the technical problem of damage to the BDU or safety concerns caused by condensed water falling on the exposed connection terminals of the BDU.

[0007] In a first embodiment of the present invention, a protective cover having a water shield and a side guard is provided, the water shielding device includes a water shielding plate, the water shielding plate is provided with a water shielding flange, and the water shielding flange is configured to engage with the top cover of the BDU such that the water shielding plate closes an upper end opening of the first cutout in the top cover of the BDU; The side guard is provided on a side of the water shield and provides a protective cover configured to engage a base of the BDU and cover a portion of the side opening of the first cutout.

[0008] In a second embodiment of the present invention, there is provided a BDU case comprising a BDU base, a BDU top cover, and a protective cover, A containment chamber is provided within the base of the BDU, an upper cover of the BDU is provided on an opening of the storage chamber so as to cover the opening of the storage chamber, a first cutout is provided on the upper cover of the BDU, the first cutout is in communication with the storage chamber, and a part of the opening of the storage chamber is exposed; A BDU case is further provided, in which a water stopper of the protective cover is attached to the first notch, the water stopper flange engages a top cover of the BDU, and a side guard of the protective cover engages a base of the BDU.

[0009] A third embodiment of the present invention further provides a BDU comprising the BDU case described above, wherein an electrical component is provided within the accommodation chamber of the BDU case.

[0010] A fourth embodiment of the present invention further provides a battery pack case comprising a main body and the above-mentioned BDU, wherein a mounting chamber is provided within the main body, and the BDU is mounted in the mounting chamber. [Brief description of the drawings]

[0011] In the following, in order to explain the technical solutions in the embodiments of the present invention, drawings necessary for explaining the embodiments of the present invention will be introduced. However, the drawings in the following description are only some embodiments of the present invention, and a person skilled in the art can also conceive of other drawings from the content of the embodiments of the present invention and these drawings without creative creation. [Figure 1] 2 is a structural schematic diagram of a protective cover according to an embodiment of the present invention, viewed from a certain angle. FIG. [Diagram 2] FIG. 4 is a structural schematic diagram of the protective cover according to one embodiment of the present invention, seen from another angle. [Diagram 3] FIG. 2 is a schematic diagram of a BDU according to one embodiment of the present invention viewed from a specific angle. [Figure 4] FIG. 4 is an enlarged view of part A in FIG. [Diagram 5] FIG. 2 is an exploded schematic diagram of a BDU according to one embodiment of the present invention. [Figure 6] 2 is a schematic diagram showing an electrical component mounted on a base in a BDU according to an embodiment of the present invention; FIG. [Figure 7] FIG. 2 is a structural schematic diagram of a base of a BDU according to one embodiment of the present invention. [Figure 8] FIG. 2 is a schematic diagram of a BDU according to one embodiment of the present invention, viewed from another direction. [Figure 9] FIG. 2 is a structural schematic diagram of a protective plate according to an embodiment of the present invention. [Figure 10]FIG. 2 is a structural schematic diagram of the top cover of the BDU according to one embodiment of the present invention. [Figure 11] FIG. 2 is a structural schematic diagram of a pack case according to one embodiment of the present invention. [Figure 12] 12 is a schematic diagram showing the structure of FIG. 11 from another angle with a part of the structure omitted. [Figure 13] FIG. 13 is an enlarged view of part B in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] In the description of this specification, the orientations or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" are based on the orientations or positional relationships shown in the drawings and are for the purpose of clarity and simplicity of description only, and do not indicate or imply that the devices or elements shown must have a particular orientation, be configured, and be operated in a particular orientation. In addition, the terms "first" and "second" are used for descriptive purposes only, and do not indicate or imply any relative importance. For example, the terms "first position" and "second position" indicate two different positions.

[0013] In the description of this specification, unless otherwise clearly specified or limited, the terms "attached", "communicated", and "connected" should be understood in a broad sense, for example, "connected" may be a fixed connection or a detachable connection; it may be a mechanical connection or an electrical connection; "communicated" may be a direct connection, an indirect connection via an intermediate medium, or an internal connection between two elements. A person skilled in the art can understand the meaning of the above terms in this specification according to the situation.

[0014] Example 1: A protective cover according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. This protective cover is applied to a BDU case, and can provide waterproof and dustproof protection to connection terminals or fuses exposed in the BDU case.

[0015] In one embodiment, the protective cover is a one-piece molded structure, thereby ensuring its structural strength. The protective cover is formed by injection molding.

[0016] As shown in FIG. 5, a first cutout 211 is usually provided in the BDU top cover 21 so as to expose connection terminals that need to be exposed inside the BDU case.

[0017] In this embodiment, the protective cover includes a water shield 11 and side edge protection 12. As shown in Fig. 1, the water shield 11 includes a water shield plate 111, which is provided with a water shield flange 1111, and the water shield flange 1111 is arranged to engage with the top cover 21 of the BDU so that the water shield plate 111 closes the upper end opening of the first cutout 211 of the top cover 21 of the BDU. The side edge protection 12 is provided on the side of the water shield 11. The side edge protection 12 is arranged so that it can engage with the base 22 of the BDU and cover a portion of the side edge opening of the first cutout 211.

[0018] As shown in Figures 3 and 4, when this protective cover is applied to a BDU case, the protective cover can simultaneously engage with the top cover 21 of the BDU and the base 22 of the BDU, thereby protecting the connection terminals or fuses exposed in the BDU case from waterproofing and dust.

[0019] In the protective cover of this embodiment, when used, the waterproof flange 1111 of the waterproof plate 111 engages with the top cover 21 of the BDU, so that the waterproof plate 111 closes the upper end opening of the first notch 211 of the top cover 21 of the BDU, thereby providing waterproof protection for the connection terminals or fuses exposed in the BDU case. When this BDU case is attached inside the pack case, condensed water generated on the inner ceiling surface of the pack case does not fall into the first notch 211 from the upper end opening. Therefore, the condensed water does not fall onto the connection terminals or fuses exposed in the BDU case, and the electrical safety performance and service life of the BDU can be guaranteed. The side guard 12 engages with the base 22 of the BDU and covers a part of the side opening of the first notch 211, so that the protective cover creates a dustproof space with the BDU case, and the connection terminals and fuses exposed in the BDU case can be protected from dust.

[0020] The side guard 12 does not cover the entire side opening of the first cutout 211, but can cover a part of the side opening of the first cutout 211. For this purpose, it is necessary to leave a space for the external harness to pass through in advance, and the external harness can be connected to the connection terminal exposed on the BDU case through the part of the opening of the first cutout 211 that is not covered.

[0021] In one embodiment, the protective cover can simultaneously engage with the BDU top cover 21 and the BDU base 22, thereby providing connection and positional constraints for the BDU top cover 21 and the BDU base 22. After the protective cover is attached in place on the BDU case, the external harness can be routed under the side guard 12 and connected to the connection terminals exposed on the BDU case.

[0022] In one embodiment, the water barrier 11 includes a support 113, a water barrier plate 111 is attached to the support 113, and an edge of the water barrier plate 111 protrudes toward (from) a side surface of the support 113 to form a water barrier flange 1111.

[0023] 1 and 2, three continuous edges of the water shield plate 111 protrude from the side surface of the support body 113 to form a water shield flange 1111. Providing the support body 113 can increase the structural strength of the protective cover.

[0024] In one embodiment, the watertight flange 1111 includes a watertight flange main body 11111 and a watertight flange fold 11112. The watertight flange main body 11111 protrudes from a side surface of the support body 113. The watertight flange fold 11112 is provided to form an included angle with the watertight flange main body 11111, and the watertight flange fold 11112 is capable of abutting against the top cover 21 of the BDU.

[0025] Providing the water-blocking flange fold 11112 allows the water-blocking flange fold 11112 to come into contact with the top cover 21 of the BDU, thereby fully ensuring that the water-blocking plate 111 blocks the first notch 211 of the BDU top cover 21. Furthermore, the presence of a gap between the water-blocking flange fold 11112 and the top cover 21 of the BDU makes it possible to prevent condensed water that has fallen onto the water-blocking plate 111 from flowing into the first notch 211 through this gap.

[0026] In one embodiment, the support 113 is provided with a first engagement groove 112 or an engagement rib 213. The first engagement groove 112 or the engagement rib 213 is arranged to engage with the top cover 21 of the BDU, thereby ensuring stability when the protective cover is attached to the top cover 21 of the BDU and ensuring that the water-blocking flange flap 11112 and the top cover 21 of the BDU are always in contact with each other.

[0027] In this embodiment, a first engagement groove 112 is provided on the support 113, and the first engagement groove 112 is arranged to engage with the top cover 21 of the BDU. Correspondingly, an engagement rib 213 is provided on the top cover 21 of the BDU, and the first engagement groove 112 engages with the engagement rib 213. The first engagement groove 112 and the engagement rib 213 have an extending length along the first direction or the second direction. After the first engagement groove 112 and the engagement rib 213 engage with each other, positional movement in the third direction and the fourth direction is restricted.

[0028] After the protective cover is installed in place, the first engagement groove 112 engages with the top cover 21 of the BDU, thereby preventing the support 113 from being displaced and fully ensuring that the waterproof flange flap 11112 and the top cover 21 of the BDU are always in abutment.

[0029] In one embodiment, the first engagement grooves 112 are provided on opposite sides of the support 113 along the fifth direction or the sixth direction.

[0030] 2 and 3, in this embodiment, after the first engagement groove 112 on one side of the support 113 engages with the top cover 21 of the BDU, the positional movement of the support 113 in the third direction and the fourth direction can be restricted. Note that the third direction and the fourth direction are opposite to each other.

[0031] After the first engagement grooves 112 on both sides of the support 113 are engaged with the top cover 21 of the BDU, the support 113 can be restricted from moving in a fifth direction and a sixth direction. The fifth direction and the sixth direction are opposite to each other. The fifth direction is perpendicular to the third direction.

[0032] In one embodiment, the support 113 is provided with a position limiting abutment surface 1131. The position limiting abutment surface 1131 abuts against the top cover 21 of the BDU so as to limit the positional movement of the support 113 in the first direction, thereby ensuring the accuracy of the mounting position of the support 113. Any two directions selected from the first direction, the third direction, and the fifth direction are perpendicular to each other.

[0033] In this embodiment, the side guards 12 engage the seats 22 of the BDU, thereby limiting the positional movement of the protective lid in a second direction, which is opposite to the first direction.

[0034] By limiting positional movement in the first direction, second direction, third direction, fourth direction, fifth direction and sixth direction, the accuracy of the installation position of the protective cover and the abutting seal are ensured.

[0035] In one embodiment, the side armor 12 is provided with an elastic engagement bar 121. The elastic engagement bar 121 is provided with a second engagement groove 1211, which can be engaged with the base 22 of the BDU.

[0036] In order to facilitate separation after the second engagement groove 1211 and the BDU base 22 are engaged, in this embodiment, the elastic engagement bar 121 is further provided with an unlocking pressing portion 1212. When the unlocking pressing portion 1212 is pressed, the elastic engagement bar 121 is configured to be able to rotate with respect to the side protector 12, whereby the BDU base 22 can be released from the second engagement groove 1211. Here, the second engagement groove 1211 and the unlocking pressing portion 1212 are disposed at both ends of the elastic engagement bar 121, respectively.

[0037] When it is necessary to separate the second engagement groove 1211 from the BDU base 22, the unlocking pressing portion 1212 can be pressed to rotate the elastic engagement bar 121 relative to the side protector 12. As a result, one end of the elastic engagement bar 121 where the second engagement groove 1211 is provided rises up relative to the BDU base 22, and the second engagement groove 1211 immediately separates from the BDU base 22.

[0038] Example 2: A BDU case having a protective cover according to a first embodiment will be described with reference to FIGS.

[0039] This BDU case further includes a BDU base 22 and a BDU top lid 21. A storage chamber 221 is provided in the BDU base 22. The BDU top lid 21 is provided at an opening of the storage chamber 221 so as to cover the opening of the storage chamber 221. A first notch 211 is provided in the BDU top lid 21, and the first notch 211 communicates with the storage chamber 221 and can expose a part of the opening of the storage chamber 221. When an electric component is installed in the storage chamber 221, a part of the connection terminal of the electric component can be exposed.

[0040] 5, the base 22 of the BDU and the top lid 21 of the BDU are connected by engagement. The top lid 21 of the BDU is provided with a top lid engagement groove 218, and the base 22 of the BDU is provided with a base engagement bump 225. The top lid engagement groove 218 engages with the base engagement bump 225, thereby realizing the engagement between the base 22 of the BDU and the top lid 21 of the BDU.

[0041] When an electric component is accommodated in the accommodating chamber 221, a part of the connection terminal of the electric component protrudes from the accommodating chamber 221. The top cover 21 of the BDU is placed on the accommodating chamber 221 to cover the upper end opening of the accommodating chamber 221, and the first cutout 211 avoids the part of the connection terminal protruding from the accommodating chamber 221, exposing the connection terminal in that part, making it possible to easily connect to another harness.

[0042] The protective cover water shield 11 is attached to the first cutout 211, and the water shield flange 1111 can engage with the BDU top cover 21 such that the water shield 111 closes the top opening of the first cutout 211 of the BDU top cover 21. The protective cover side guard 12 can engage with the BDU base 22 and cover a portion of the side opening of the first cutout 211.

[0043] The protective cover can protect the connection terminals of the electric components protruding from the accommodating chamber 221 from water and dust.

[0044] 1 to 4, the water shielding device 11 includes a support 113, a water shielding plate 111 is provided on the support 113, and edges of the water shielding plate 111 protrude from a side surface of the support 113 to form a water shielding flange 1111. In this embodiment, three consecutive edges of the water shielding plate 111 protrude from the support 113 to form the water shielding flange 1111.

[0045] In one embodiment, a drainage groove 212 is provided in the top cover 21 of the BDU along the circumferential direction of the first cutout 211. A water-blocking flange 1111 can be engaged in the drainage groove 212, and a drainage gap 219 exists between the water-blocking flange 1111 and a side of the drainage groove 212 away from the first cutout 211.

[0046] Here, the watertight flange 1111 includes a watertight flange main body 11111 and a watertight flange fold 11112. The watertight flange main body 11111 protrudes from the support body 113. The watertight flange fold 11112 is provided so as to form an included angle with the watertight flange main body 11111, and the watertight flange fold 11112 can abut against the top cover 21 of the BDU.

[0047] As shown in FIG. 4, the drainage groove 212 is U-shaped, and the watertight flange 1111 is also U-shaped correspondingly. The surface of the watertight flange fold 11112 facing the support 113 is a concave arc surface, and the side surface of the drainage groove 212 close to the first notch 211 is a convex arc surface. When the protective cover is attached in a predetermined position, the concave arc surface and the convex arc surface abut against each other, so that there is no gap between them through which water can seep in. A drainage gap 219 exists between the surface of the watertight flange fold 11112 facing away from the support 113 and the side surface of the drainage groove 212 facing away from the first notch 211.

[0048] With the BDU case attached inside the pack case, when condensed water generated on the inner ceiling surface of the pack case falls onto the upper surface of the BDU top cover 21 or the upper surface of the water shield 111, the fallen condensed water immediately flows into the drainage gap 219 and flows out from the outlet of the drainage gap 219 to be discharged. The condensed water that flows out from the outlet of the drainage gap 219 flows along the side wall of the BDU top cover 21 to the side wall of the BDU base 22.

[0049] As shown in Fig. 4, in one embodiment, a first engagement groove 112 is provided in the support 113, and an engagement rib 213 that engages and fits into the first engagement groove 112 is provided in the top cover 21 of the BDU. The first engagement groove 112 and the engagement rib 213 are engaged by inserting the protective cover from top to bottom to a predetermined position and attaching it. In the engaged state, it is possible to limit the positional movement of the protective cover in a third direction and a fourth direction. Note that the third direction and the fourth direction are opposite directions.

[0050] In one embodiment, first engagement grooves 112 are provided on both opposing sides (both sides along the fifth direction or the sixth direction) of the support 113, and engagement ribs 213 are provided on the top cover 21 of the BDU so as to correspond one-to-one with the first engagement grooves 112. This configuration makes it possible to limit the positional movement of the protective cover in the fifth direction and the sixth direction. Note that the fifth direction and the sixth direction are opposite directions, and both the fifth direction and the sixth direction are perpendicular to the third direction or the fourth direction.

[0051] In one embodiment, the support 113 is provided with a position limiting abutment surface 1131, and the top cover 21 of the BDU is provided with an abutment rib 214. The abutment rib 214 and the engagement rib 213 are provided perpendicular to each other, and the position limiting abutment surface 1131 abuts against the abutment rib 214, thereby limiting the position movement of the protective cover in the first direction.

[0052] In the orientation shown in Fig. 4, the water shield 111 is provided on the upper surface of the support 113, and the lower surface of the support 113 is the position limiting abutment surface 1131. A first engagement groove 112 is provided on both the left and right sides of the support 113. On the inner surface of the first cutout 211, on both the left and right side surfaces, an engagement rib 213 extending vertically (extending along the first direction or the second direction) is provided, and further an abutment rib 214 extending horizontally (extending along the third direction or the fourth direction) is provided.

[0053] In one embodiment, the side guard 12 of the protective cover is provided with a resilient engagement bar 121, one of the resilient engagement bar 121 and the base 22 of the BDU is provided with a second engagement groove 1211, and the other is provided with a base engagement block 222 of the BDU. Here, the second engagement groove 1211 can be engaged with the base engagement block 222 of the BDU so as to limit the positional movement of the protective cover in the second direction.

[0054] In this embodiment, a second engagement groove 1211 is provided in the elastic engagement bar 121, and a BDU base engagement block 222 engageable with the second engagement groove 1211 is provided on the BDU base 22. With the protective lid attached in a predetermined position, the second engagement groove 1211 abuts against the BDU base engagement block 222, limiting the positional movement of the protective lid in the second direction.

[0055] In order to facilitate the disengagement of the second engagement groove 1211 from the base engagement block 222 of the BDU, the elastic engagement bar 121 is further provided with an unlocking pressing portion 1212. When the unlocking pressing portion 1212 is pressed, the elastic engagement bar 121 rotates relative to the side guard 12. Here, the second engagement groove 1211 and the unlocking pressing portion 1212 are respectively disposed at both ends of the elastic engagement bar 121. When it is necessary to disengage the second engagement groove 1211 from the base engagement block 222 of the BDU, the unlocking pressing portion 1212 is pressed to rotate the elastic engagement bar 121 relative to the side guard 12. As a result, one end of the elastic engagement bar 121 provided with the second engagement groove 1211 is lifted relative to the base 22 of the BDU, and the second engagement groove 1211 immediately disengages from the base engagement block 222 of the BDU.

[0056] The installation procedure for the protective cover is as follows: The protective lid is moved downward in the vertical direction. By vertically aligning the first engagement groove 112 and the engagement rib 213 and moving the protective lid downward, the first engagement groove 112 and the engagement rib 213 engage with each other, and the position limiting abutment surface 1131 abuts against the upper surface of the abutment rib 214. In this state, the water-blocking flange cuff 11112 abuts within the drainage groove 212, and the second engagement groove 1211 engages with the pedestal engagement block 222 of the BDU.

[0057] In one embodiment, the side guard 12 is plate-shaped, which allows the second engagement groove 1211 to smoothly engage with the base engagement block 222 of the BDU when the protective cover is attached.

[0058] 1 and 2, the elastic engagement bar 121 is movably installed in a movable aperture installed in the side guard 12. When the unlocking pressing portion 1212 is pressed, the elastic engagement bar 121 rotates in the movable aperture around the unlocking pressing portion 1212, whereby the second engagement groove 1211 is disengaged from the base engagement block 222 of the BDU.

[0059] When electrical components are provided in the receiving chamber 221, it is necessary to expose a number of terminals of the electrical components. For example, two first cutouts 211 are provided in the top cover 21 of the BDU. The terminals exposed from the two first cutouts 211 are a battery charging terminal and a quick charging terminal, respectively, and two protective covers are installed on the two first cutouts 211 so as to cover the two first cutouts 211, respectively, to protect the exposed terminals.

[0060] As shown in Figs. 5 to 10, the electrical component is further provided with a terminal to be connected to the pack end, and in this embodiment, a second cutout 215 is further provided in the top cover 21 of the BDU in order to expose the terminal to be connected to the pack end. The size of the second cutout 215 is larger than the first cutout 211. In one embodiment, the BDU case further includes a protective plate 23 in order to waterproof and protect the terminal to be connected to the pack end of the electrical component. The top cover 21 of the BDU is provided with the second cutout 215, and the protective plate 23 is disposed in the second cutout 215. The protective plate 23 is connected to both the base 22 of the BDU and the top cover 21 of the BDU to protect the terminal exposed from the second cutout 215.

[0061] In one embodiment, the protective plate 23 is provided with an elastic abutment arm 231, which can be brought into elastic abutment with the base 22 of the BDU.

[0062] As shown in Figs. 8 to 10, the elastic abutment arm 231 has a U-shaped structure with an opening facing upward. The protective plate 23 is provided with an arc-shaped position limiting portion 232. An arc-shaped position limiting groove is provided in the arc-shaped position limiting portion 232, and the top cover 21 of the BDU is provided with a position limiting shaft 216 that is connected in one-to-one correspondence with the arc-shaped position limiting groove. In a state in which the protective plate 23 is attached to the second cutout 215, a U-shaped position limiting block 217 is provided on the top cover 21 of the BDU in order to limit the positional movement of the protective plate 23 in the left-right direction. The U-shaped position limiting block 217 includes a first portion, and one second portion is vertically provided on each end of the first portion. When both ends of the position limiting shaft 216 are respectively connected to the two second parts and the arc-shaped position limiting groove is connected to the position limiting shaft 216, one end of the arc-shaped position limiting portion 232 is located in the space between the position limiting shaft 216 and the first part, and both sides of the arc-shaped position limiting portion 232 abut against the two second parts, respectively.

[0063] Taking the orientation shown in Figure 8 as an example, with the arc-shaped position limiting portion 232, the U-shaped position limiting block 217 and the position limiting shaft 216 attached in specified positions, the position movement of the protective plate 23 in the left-right direction can be limited.

[0064] The elastic abutment arm 231 elastically abuts against the base 22 of the BDU, and the arc-shaped position limiting portion 232 abuts against the first portion, thereby limiting the movement of the protective plate 23 in the front-rear direction. The front-rear direction is on the same plane as the left-right direction, and are mutually perpendicular directions.

[0065] In one embodiment, the outer surface of the BDU base 22 is provided with a fastener 223. The fastener 223 can engage an external high voltage harness interlock connector to securely mount the high voltage harness interlock connector.

[0066] 3 and 5, the fixture 223 includes a fastening groove, and the fastener of the high-voltage harness interlock connector can be engaged in the fastening groove, which eliminates the need to provide a bracket for supporting the high-voltage harness interlock connector on the pack case.

[0067] 7 and 8, in one embodiment, the base 22 of the BDU is provided with an engagement hole 224. The engagement hole 224 is provided outside the receiving chamber 221, which facilitates connection and conduction between the external harness and the high-voltage harness interlock connector. The engagement hole 224 is a waist-shaped hole, which allows the fastener of the socket of the high-voltage harness interlock connector to be quickly engaged with the waist-shaped hole.

[0068] Example 3: 3 to 10, in this embodiment, a BDU is provided that includes the BDU case of Example 2. Electrical components are provided in the accommodation chamber 221 of the BDU case.

[0069] In this embodiment, the electrical components do not include a negative relay, and the interface directions of the positive relay and the quick charging relay are arranged perpendicular to each other, which is advantageous for the design of the external busbar 104, and when this BDU is applied to a finished vehicle, it can withstand impacts from different directions.

[0070] As shown in Fig. 5, the electrical component is provided with a plurality of voltage collection points. The voltage collection points are provided with insertion pieces 103, which are arranged to be connected to bus bars 104. The voltage collection points adopt a form in which the insertion pieces 103 are crimped to the bus bars 104, and a quick insertion terminal is used at the harness end of the collection signal line to realize quick insertion, which is advantageous for improving productivity.

[0071] In one embodiment, the collection signal line and the bus bar 104 are connected by ultrasonic welding, so as to ensure the relay efficiency of the collection harness.

[0072] Example 4: Battery pack case. As shown in FIGS. 11 to 13, this embodiment provides a battery pack case equipped with the BDU of the third embodiment.

[0073] This battery pack case includes a main body 10 and the BDU of Example 3. An attachment chamber 101 is provided in the main body 10, and the BDU is attached in the attachment chamber 101. The main body 10 is for attaching a battery module. Here, the base 22 of the BDU is attached and fixed in the attachment chamber 101 via a connector.

[0074] 12 and 13, in this embodiment, the BDU has a BDU output pole 201, the pack case has a pack case connector 102, and the BDU output pole 201 is screwed into the pack case connector 102 for connection. This eliminates the need for a bus bar 104 between the BDU output pole 201 and the pack case connector 102.

[0075] In one embodiment, a pack trickle charge port and a pack fast charge port are provided on the battery pack case, and electrical components of the BDU are connected to both the pack trickle charge port and the pack fast charge port. [Explanation of symbols]

[0076] 10, main body; 101, mounting chamber; 102, pack case connector; 103, insert; 104, busbar; 201, BDU output pole; 11. Water barrier; 111, water shield; 1111, watertight flange; 11111, waterproof flange body; 11112, Watertight flange turn-up; 112, first engagement groove; 113, support; 1131 , position limiting abutment surface; 12, side protection equipment; 121, elastic engagement bar; 1211, second engagement groove; 1212, unlocking pressing part; 21, BDU top cover; 211, first notch; 212, drainage groove; 213, engagement rib; 214, abutment rib; 215, second notch; 216, position limit axis; 217, U-shaped position limiting block; 218, upper cover engagement groove; 219, drainage gap; 22, BDU pedestal; 221, containment chamber; 222, BDU pedestal engagement block; 223, Fixtures; 224, engagement hole; 225, pedestal engagement bump; 23, protective plate; 231 , elastic abutment arm; 232, arc-shaped position limiter

Claims

1. A protective cover for engaging with a battery disconnect unit (BDU) having a first notch (211) in a top cover (21) so as to expose a portion of a connection terminal of an internal electrical component, Equipped with a waterproofing device (11) and side protection devices (12), the water shielding device (11) includes a water shielding plate (111), the water shielding plate (111) is provided with a water shielding flange (1111), and the water shielding flange (1111) is configured to engage with the upper cover (21) of the BDU such that the water shielding plate (111) closes an upper end opening of the first notch (211) of the upper cover (21) of the BDU; The side guard (12) is provided on the side of the water shield (11) and is configured to engage with the base (22) of the BDU and cover a portion of the side opening of the first notch (211); The water-blocking device (11) includes a support (113), the water-blocking plate (111) is attached to the support (113), and the edge of the water-blocking plate (111) protrudes from the side of the support (113) to form the water-blocking flange (1111).

2. The waterproof flange (1111) includes a waterproof flange main body (11111) and a waterproof flange fold (11112), The waterproof flange main body (11111) protrudes from the side surface of the support body (113), The protective lid of claim 1, wherein the waterproof flange fold (11112) is arranged to form an angle with the waterproof flange main body (11111) and is configured to abut against the top lid (21) of the BDU.

3. 2. The protective lid of claim 1, wherein the support (113) is provided with a first engagement groove (112) or an engagement rib (213), and the first engagement groove (112) or the engagement rib (213) is configured to engage with a top lid (21) of the BDU.

4. The protective lid of claim 1, wherein the support (113) is provided with a position limiting abutment surface (1131), the position limiting abutment surface (1131) being configured to abut against a top lid (21) of the BDU to limit positional movement of the support (113) in a first direction.

5. The protective cover according to claim 1, wherein the side guard (12) is provided with an elastic engagement bar (121), and a second engagement groove (1211) is provided on the elastic engagement bar (121).

6. The protective cover of claim 5, wherein the elastic engagement bar (121) is further provided with an unlocking pressure portion (1212), and when the unlocking pressure portion (1212) is pressed, the elastic engagement bar (121) is configured to rotate relative to the side guard (12).

7. The protective lid according to any one of claims 1 to 6, wherein the protective lid is of one-piece construction.

8. A battery disconnect unit (BDU) case comprising a base (22) for the battery disconnect unit (BDU), a top cover (21) for the BDU, and a protective cover according to any one of claims 1 to 6, A storage chamber (221) is provided within the base (22) of the BDU; The top cover (21) of the BDU is installed at an opening of the accommodating chamber (221) so as to cover the opening of the accommodating chamber (221), and a first notch (211) is provided in the top cover (21) of the BDU, and the first notch (211) is connected to the accommodating chamber (221) and is capable of exposing a portion of the opening of the accommodating chamber (221) so as to expose a portion of a connection terminal of an electrical component arranged inside the accommodating chamber (221); A BDU case in which the water-blocking device (11) of the protective cover is attached to the first notch (211), the water-blocking flange (1111) engages with the top cover (21) of the BDU, and the side protection device (12) of the protective cover engages with the base (22) of the BDU.

9. The BDU case of claim 8, wherein a drainage groove (212) is provided in the top cover (21) of the BDU along the circumferential direction of the first cutout (211), the water-tight flange (1111) engages within the drainage groove (212), and a drainage gap (219) exists between the water-tight flange (1111) and a side of the drainage groove (212) away from the first cutout (211).

10. The BDU case of claim 9, wherein one of the protective lid support (113) and the BDU top lid (21) is provided with a first engagement groove (112), and the other is provided with an engagement rib (213) that engages with and fits into the first engagement groove (112), and the first engagement groove (112) is configured to engage with and fit into the engagement rib (213) to limit positional movement of the protective lid in a third direction and a fourth direction, the third direction and the fourth direction being opposite directions.

11. The BDU case of claim 10, wherein the first engagement groove (112) is provided on both sides of the support (113) in the fifth direction or the sixth direction, the engagement rib (213) of the top cover (21) of the BDU is provided to correspond one-to-one with the first engagement groove (112), and the engagement rib (213) is configured to engage with the first engagement groove (112) to limit positional movement of the protective cover in the fifth direction and the sixth direction, the fifth direction and the sixth direction being opposite directions, and the fifth direction and the sixth direction being perpendicular to the third direction or the fourth direction.

12. The BDU case of claim 11, wherein the support (113) is provided with a position limiting abutment surface (1131), the upper cover (21) of the BDU is provided with an abutment rib (214), the abutment rib (214) and the engagement rib (213) are arranged perpendicular to each other, and the position limiting abutment surface (1131) is configured to abut against the abutment rib (214) to limit the position movement of the protective cover in a first direction.

13. The BDU case of claim 8, wherein the side guard (12) is provided with an elastic engagement bar (121), a second engagement groove (1211) is provided on one of the elastic engagement bar (121) and the BDU base (22), and a BDU base engagement block (222) is provided on the other, and the second engagement groove (1211) is configured to engage with the BDU base engagement block (222) to limit positional movement of the protective lid in a second direction.

14. 9. The BDU case of claim 8, wherein an outer surface of the BDU base is provided with a fastener (223), the fastener (223) being configured to fasten an external high voltage harness interlock connector.

15. The BDU case of claim 8, wherein the base (22) of the BDU is provided with an engagement hole (224), and the engagement hole (224) is provided outside the accommodating chamber (221).

16. The BDU case of claim 8, wherein one of the base (22) of the BDU and the top cover (21) of the BDU is provided with a base engagement bump (225), and the other is provided with a top cover engagement groove (218) that fits and engages with the base engagement bump (225).

17. The BDU case of claim 8, further comprising a protective plate (23), the top cover (21) of the BDU being provided with a second notch (215), the protective plate (23) being positioned within the second notch (215), and the protective plate (23) being connected to both the base (22) of the BDU and the top cover (21) of the BDU.

18. The BDU case according to claim 17, wherein the protective plate (23) is provided with an elastic abutment arm (231), the elastic abutment arm (231) being configured to elastically abut against the base (22) of the BDU.

19. A battery disconnect unit (BDU) comprising a BDU case as claimed in claim 8, wherein the electrical component is disposed within a receiving chamber (221) of the BDU case.

20. 20. The BDU of claim 19, wherein the electrical component is provided with a plurality of voltage collecting points, the voltage collecting points are provided with inserts (103), and the inserts (103) are crimped to bus bars (104).

21. A battery pack case comprising a main body (10) and the BDU according to claim 19, A mounting chamber (101) is provided within the body (10); The BDU is mounted in the mounting chamber (101), a battery pack case.

22. The battery pack case of claim 21, wherein the BDU has a BDU output terminal (201), the battery pack case is provided with a pack case connector (102), and the BDU output terminal (201) is screwed into the pack case connector (102).

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