BDU module and battery system

Abstract

The utility model relates to the technical field of energy storage equipment, and provides a BDU module and a battery system, and the BDU module comprises a bottom plate, a first mounting base and a pre-charging assembly. Wherein the first mounting base is mounted on the bottom plate, the first mounting base comprises a first mounting part and a second mounting part, the first mounting part is arranged on the bottom plate, the second mounting part is arranged on the side, away from the bottom plate, of the first mounting part, the first mounting part is provided with a first cavity, and the second mounting part is provided with a second cavity. The pre-charging assembly comprises a pre-charging resistor and a pre-charging relay, the pre-charging resistor is arranged in the first cavity, the pre-charging relay is arranged in the second cavity, and orthographic projection parts of the pre-charging resistor and the pre-charging relay in the plane where the bottom plate is located coincide. The pre-charging resistor and the pre-charging relay can be distributed in the height direction through the first mounting base, so that the pre-charging resistor and the pre-charging relay can coincide with other electric devices of the BDU module in the height direction, the space is effectively utilized, and the occupied space of the BDU module in the horizontal direction can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, in particular to a BDU module and a battery system. Background Art

[0002] A Battery Energy Distribution Unit (BDU) is a high-voltage power-off system in a battery system (or battery pack, battery module). It controls the current flow to different loads and is an important component in the high-voltage circuit of new energy vehicles. When electrically connected to the high-voltage circuit of new energy vehicles, it controls the power-on and power-off processes, pre-charging process, and charging process of the high-voltage electrical circuit.

[0003] The BDU includes a pre-charging circuit module and other circuit modules. The pre-charging circuit module includes a pre-charge resistor and a pre-charge relay. In related technologies, for the convenience of electrical connection of each electrical component to achieve the target electrical function, the electrical components such as the pre-charge resistor, the pre-charge relay, and other circuit modules are usually arranged horizontally. This relatively scattered assembly method increases the size of the BDU in the horizontal direction. However, in the height direction, the sizes of the pre-charge resistor and the pre-charge relay are usually smaller than those of the electrical components of other circuit modules. If the pre-charge resistor, the pre-charge relay, and other electrical components are all arranged horizontally, the space in the height direction will not be reasonably utilized, resulting in an unnecessary increase in the size of the BDU in the horizontal direction. Summary of the Utility Model

[0004] Embodiments of the utility model provide a BDU module and a battery system, which can improve the technical problem of unreasonable space utilization existing in the BDU in related technologies.

[0005] In a first aspect, embodiments of the utility model provide a BDU module, including:

[0006] A bottom plate;

[0007] A first mounting base, mounted on the bottom plate; the first mounting base includes a first mounting portion and a second mounting portion. The first mounting portion is provided on the bottom plate, and the second mounting portion is provided on a side of the first mounting portion away from the bottom plate; a first chamber is provided in the first mounting portion, and a second chamber is provided in the second mounting portion;

[0008] A pre-charging assembly, including a pre-charge resistor and a pre-charge relay. The pre-charge resistor is provided in the first chamber, and the pre-charge relay is provided in the second chamber; the orthographic projections of the pre-charge resistor and the pre-charge relay on the plane where the bottom plate is located partially overlap.

[0009] In one embodiment, the first mounting portion includes two opposite ends and an intermediate portion connecting between the two ends. The second mounting portion is disposed on the intermediate portion. A through hole is defined in a side of each end away from the bottom plate.

[0010] The pre-charge resistor includes a resistor body and two connection terminals respectively disposed at two ends of the resistor body. One connection terminal is disposed at one end of the resistor body, and the other connection terminal is disposed at the other end of the resistor body. The resistor body is received in the first chamber. One connection terminal is located in one through hole, and the other connection terminal is located in the other through hole. A positive projection of the pre-charge relay and the resistor body on the plane where the bottom plate is located partially overlaps.

[0011] In one embodiment, a first mounting opening is defined in an end of the first mounting portion close to the bottom plate. The first mounting opening is used to assemble the pre-charge resistor into the first chamber; and / or

[0012] A second mounting opening is provided at an end of the second mounting portion away from the bottom plate. The second mounting opening is used to assemble the pre-charge relay into the second chamber.

[0013] In one embodiment, the first mounting portion includes a first limiting shell and a first limiting structure. The first chamber is defined in the first limiting shell. The first limiting shell includes a first end away from the second mounting portion, and the first end forms the first mounting opening. The first limiting structure is disposed at the first end and is used to limit the pre-charge resistor in the first chamber.

[0014] and / or, the second mounting portion includes a second limiting shell and a second limiting structure. The second chamber is defined in the second limiting shell. The second limiting shell includes a second end away from the first mounting portion, and the second end forms the second mounting opening. The second limiting structure is disposed at the second end and is used to limit the pre-charge relay in the second chamber.

[0015] In one embodiment, a first guiding inclined surface is disposed on a side of the first limiting structure facing the bottom plate, and a first limiting surface is disposed on a side of the first limiting structure away from the bottom plate. The first limiting surface can abut against the pre-charge resistor.

[0016] and / or, a second guiding inclined surface is disposed on a side of the second limiting structure away from the second chamber, and a second limiting surface is disposed on a side of the second limiting structure facing the second chamber. The second limiting surface can abut against the pre-charge relay.

[0017] In one embodiment, the first limiting shell includes two relatively arranged first sub-sidewalls, each of the first sub-sidewalls is provided with at least a pair of first notches, the first notches extend from the first mounting opening towards the second mounting portion, a portion between each pair of the first notches in the first sub-sidewall forms a first elastic member, and the first limiting structure protrudes from an end of the first elastic member close to the bottom plate; and / or

[0018] The second limiting shell includes two relatively arranged second sub-sidewalls, each of the second sub-sidewalls is provided with at least a pair of second notches, the second notches extend from the second mounting opening towards the first mounting portion, a second elastic member is formed between each pair of the second notches in the second sub-sidewall, and the second limiting structure protrudes from an end of the second elastic member away from the bottom plate.

[0019] In one embodiment, the BDU module further includes a second mounting base and a conductive element. The second mounting base includes a mounting surface, a first protrusion, and a second protrusion. The mounting surface includes a relatively arranged first side and a second side. The first protrusion is arranged on the first side, the second protrusion is arranged on the second side, and at least a part of the conductive element is arranged between the first protrusion and the second protrusion.

[0020] In one embodiment, the BDU module further includes a plurality of collecting elements. The plurality of collecting elements include a first collecting member and a second collecting member. The first collecting member and the second collecting member are electrically connected to the conductive element; the first collecting member includes a first fixing piece and a first connection end arranged on the first fixing piece, the second collecting member includes a second fixing piece and a second connection end arranged on the second fixing piece; the first fixing piece and the second fixing piece are spaced apart and arranged on the surface of the conductive element, the first connection end and the second connection end protrude from the conductive element, and the first connection end and the second connection end extend in different directions.

[0021] In one embodiment, the conductive element includes a first assembly surface, a second assembly surface, and a side surface. The first assembly surface and the second assembly surface are arranged to face away from each other, and the side surface is connected between the first assembly surface and the second assembly surface;

[0022] The first fixing piece is attached to the first assembly surface; the first connection end includes a first part close to the first fixing piece and a second part away from the first fixing piece. The first part is attached to the side surface, and the second part protrudes from the second assembly surface along the side surface; and / or,

[0023] The second fixing piece is attached to the second assembling surface, and the second connecting end protrudes from the side surface along the second assembling surface; the second collecting member further includes a second limiting piece, the second limiting piece is bent and connected to the second fixing piece, and the second limiting piece is attached to the side surface.

[0024] In one embodiment, there are two second protrusions, and an avoidance space is formed between the two second protrusions. The first fixing piece is located between the installation surface and the first assembling surface, and the first part is located in the avoidance space.

[0025] In one embodiment, the BDU module further includes two connecting pieces. One connecting piece is detachably connected to the first collecting member and the conductive element, and the other connecting piece is detachably connected to the second collecting member and the conductive element.

[0026] In a second aspect, an embodiment of the present invention further provides a battery system, including: a battery module; and the BDU module according to any embodiment of the present application, and the battery module is electrically connected to the BDU module.

[0027] The beneficial effects of the embodiments of the present invention: By providing a first installation base on the bottom plate, the first installation part of the first installation base is arranged on the bottom plate, the second installation part is arranged on the side of the first installation part away from the bottom plate, the first installation part is provided with a first chamber, the second installation part is provided with a second chamber, the pre-charge resistor is arranged in the first chamber, the pre-charge relay is arranged in the second chamber, and the orthographic projections of the pre-charge resistor and the pre-charge relay in the plane of the bottom plate partially overlap. The embodiments of the present invention make full use of the part of the pre-charge resistor that does not need to be connected to external electrical components. A pre-charge relay can be arranged above this part of the area. The pre-charge resistor and the pre-charge relay can be arranged in the height direction through the first installation base. With this design, the pre-charge resistor and the pre-charge relay can coincide with other electrical components of the BDU module in the height direction, effectively utilizing the space inside the BDU module, and further reducing the occupied space of the BDU module in the horizontal direction. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of the BDU module provided by the embodiment of the present invention;

[0030] Figure 2It is a schematic diagram of the internal assembly of the BDU module provided by an embodiment of the present utility model;

[0031] Figure 3 It is an exploded view between the base and the BDU module provided by an embodiment of the present utility model;

[0032] Figure 4 It is a schematic diagram of the top-side structure of the base provided by an embodiment of the present utility model;

[0033] Figure 5 It is an exploded view between the base, the pre-charge resistor and the pre-charge relay provided by an embodiment of the present utility model;

[0034] Figure 6 It is a schematic diagram of the structure of the first mounting base provided by an embodiment of the present utility model;

[0035] Figure 7 It is a schematic diagram of the bottom-side structure of the base provided by an embodiment of the present utility model;

[0036] Figure 8 It is a view of the first mounting base in one direction provided by an embodiment of the present utility model;

[0037] Figure 9 It is a view of the first mounting base in another direction provided by an embodiment of the present utility model;

[0038] Figure 10 It is Figure 9 an enlarged schematic diagram of part B in;

[0039] Figure 11 It is Figure 8 an enlarged schematic diagram of part A in;

[0040] Figure 12 It is an exploded view in one direction among the second mounting base, the conductive element and the acquisition element provided by an embodiment of the present utility model;

[0041] Figure 13 It is an exploded view in another direction among the second mounting base, the conductive element and the acquisition element provided by an embodiment of the present utility model.

[0042] Explanation of reference numerals:

[0043] 1. BDU module; x. First direction; y. Second direction; z. Third direction;

[0044] 10. Base; 101. Installation space; 11. Bottom plate; 110. Assembly port; 12. Enclosure wall; 13. First mounting base; 131. First mounting portion; 13101. First chamber; 13102. Through port; 13103. First mounting opening; 1311. First limiting shell; 13111. First sub-side wall; 13112. First notch; 13113. First elastic member; 1312. First limiting structure; 13121. First guiding inclined surface; 13122. First limiting surface; 132. Second mounting portion; 13201. Second chamber; 13202. Second mounting opening; 1321. Second limiting shell; 13211. Second sub-side wall; 13212. Second notch; 13213. Second elastic member; 1322. Second limiting structure; 13221. Second guiding inclined surface; 13222. Second limiting surface; 14. Second mounting base; 1401. Limiting space; 1402. Avoidance space; 141. Mounting substrate; 1410. First through hole; 1411. Mounting surface; 142. First protrusion; 143. Second protrusion;

[0045] 20. BDU module; 21. Pre-charge resistor; 211. Resistor body; 212. Connection terminal; 22. Pre-charge relay; 23. Conductive element; 230. Second through hole; 231. First assembly surface; 232. Second assembly surface; 233. Side surface; 24. Electrical component; 25. First acquisition member; 251. First fixing piece; 2510. First connection hole; 252. First connection end; 2521. First part; 2522. Second part; 26. Second acquisition member; 261. Second fixing piece; 2610. Second connection hole; 262. Second connection end; 263. Second limiting piece. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0047] The Battery energy Distribution Unit (BDU) is a high-voltage power-off system in a battery system (or battery pack). It controls the current flow to different loads and is an important component in the high-voltage circuit of new energy vehicles. When electrically connected to the high-voltage circuit of a new energy vehicle, it controls the power-on and power-off processes, pre-charging process, and charging process of the high-voltage electrical circuit.

[0048] The BDU includes a pre-charging circuit module and other circuit modules. The pre-charging circuit module includes a pre-charge resistor and a pre-charge relay. In related technologies, for the convenience of electrical connection of each electrical component to achieve the target electrical function, the electrical components such as the pre-charge resistor, pre-charge relay, and other circuit modules are usually arranged along the first direction and / or the second direction of the BDU. This relatively scattered assembly method increases the size of the BDU in the first direction and / or the second direction. However, in the third direction, the sizes of the pre-charge resistor and pre-charge relay are usually smaller than those of the electrical components of other circuit modules. If the pre-charge resistor, pre-charge relay, and other electrical components are all arranged along the first direction and / or the second direction, the space in the third direction will not be reasonably utilized, resulting in an unnecessary increase in the size of the BDU in the first direction and / or the second direction.

[0049] In view of this, the present application provides a BDU module to solve the problem of unreasonable increase in the size in the first direction and the second direction caused by the unreasonable utilization of the space of the BDU in related technologies.

[0050] As Figure 1 , before specifically describing each embodiment of the present application, it should also be noted that the first direction x, the second direction y, and the third direction z described in this specification are orthogonal directions. Among them, the first direction x may refer to the length direction of the BDU module 1, the second direction y may refer to the width direction of the BDU module 1, and the third direction z may refer to the height direction of the BDU module 1.

[0051] Please refer to Figures 1 to 4 , Figure 1 is a schematic structural diagram of the BDU module provided by the embodiment of the present application, Figure 2 is an internal assembly schematic diagram of the BDU module provided by the embodiment of the present application, Figure 3 is an exploded schematic diagram between the base and the BDU module provided by the embodiment of the present application, Figure 4Schematic top - side structure diagram of the base provided by the embodiment of the present application. The BDU module 1 provided by the present application may include a base 10 and a BDU module 20. The base 10 includes a bottom plate 11 and a surrounding wall 12. The surrounding wall 12 extends along the edge of the bottom plate 11 to cooperate with the bottom plate 11 to enclose an installation space 101. The BDU module 20 is disposed in the installation space 101. The base 10 may further include a first mounting base 13. The first mounting base 13 is disposed in the installation space 101 and mounted on the bottom plate 11. The first mounting base 13 includes a first mounting portion 131 and a second mounting portion 132. The first mounting portion 131 is disposed on the bottom plate 11, and the second mounting portion 132 is disposed on the side of the first mounting portion 131 away from the bottom plate 11. A first chamber 13101 is provided in the first mounting portion 131, and a second chamber 13201 is provided in the second mounting portion 132. The BDU module 20 may include a pre - charge component. The pre - charge component may include a pre - charge resistor 21 and a pre - charge relay 22. The pre - charge resistor 21 is disposed in the first chamber 13101, and the pre - charge relay 22 is disposed in the second chamber 13201. The orthographic projections of the pre - charge resistor 21 and the pre - charge relay 22 on the plane where the bottom plate 11 is located partially overlap.

[0052] In the embodiment of the present utility model, by providing a first mounting base on the bottom plate, the first mounting portion of the first mounting base is disposed on the bottom plate, the second mounting portion is disposed on the side of the first mounting portion away from the bottom plate, a first chamber is provided in the first mounting portion, a second chamber is provided in the second mounting portion, the pre - charge resistor is disposed in the first chamber, the pre - charge relay is disposed in the second chamber, and the orthographic projections of the pre - charge resistor and the pre - charge relay on the plane where the bottom plate is located partially overlap. The part of the pre - charge resistor that does not need to be connected to external electrical components is fully utilized, and the pre - charge relay can be disposed above this part of the area. The pre - charge resistor and the pre - charge relay can be distributed in the height direction through the first mounting base. With this design, the pre - charge resistor and the pre - charge relay can overlap with other electrical components of the BDU module in the height direction, effectively utilizing the space inside the BDU module, and thus reducing the occupied space of the BDU module in the horizontal direction.

[0053] Please refer to Figure 5 and Figure 6 , Figure 5 is an exploded view between the base provided by the embodiment of the present application and the pre - charge resistor and the pre - charge relay. Figure 6This is a schematic structural diagram of the first mounting base provided by an embodiment of the present application. The first mounting portion 131 may include two opposite end portions and an intermediate portion connected between the two end portions, so that it can adaptively assemble a pre-charge resistor 21 having a preset length and a columnar shape. The second mounting portion 132 may be disposed on the intermediate portion. A through hole 13102 is provided on the side of each end portion facing away from the bottom plate 11. The pre-charge resistor 21 may include a resistor body 211 and two connection terminals 212 respectively disposed at both ends of the resistor body 211. The resistor body 211 is received in the first chamber 13101. One connection terminal 212 is located in a through hole 13102, and the other connection terminal 212 is located in another through hole 13102. The positive projection of the pre-charge relay 22 and the resistor body 211 on the plane where the bottom plate 11 is located partially overlaps.

[0054] Specifically, the first mounting portion 131 includes two end portions and a middle portion. One end portion, the middle portion, and the other end portion of the first mounting portion 131 are sequentially distributed along the length direction of the first mounting portion 131. The second mounting portion 132 is disposed in the middle portion of the first mounting portion 131, that is, the middle portion of the first mounting portion 131 becomes an overlapping portion between the first mounting portion 131 and the second mounting portion 132, so that the first mounting portion 131 and the second mounting portion 132 are distributed along the third direction z. This effectively reduces the occupied space of the BDU module 1 / BDU module 20 in the first direction x and / or the second direction y. Since the second mounting portion 132 is disposed in the middle portion of the first mounting portion 131, this can enable the connection end of the pre-charge resistor 21 to extend outwards from the first chamber 13101 through the through hole 13102 provided at the end portion of the first mounting portion 131 for easy electrical connection. In addition to the pre-charge assembly, the BDU module 20 further includes other electrical components 24 that can be electrically connected to the pre-charge resistor 21 and the pre-charge relay 22. The pre-charge resistor 21, the pre-charge relay 22, and the other electrical components 24 are electrically connected into a target circuit to achieve the target electrical function of the BDU module 20. In an embodiment of mounting the first mounting base 13 on the base 10, the length of the first mounting portion 131 can be kept consistent with the first direction x. This embodiment can effectively reduce the occupied space of the BDU module 1 in the second direction y. In another embodiment of mounting the first mounting base 13 on the base 10, the length of the first mounting portion 131 can be kept consistent with the second direction y. This embodiment can effectively reduce the occupied space of the BDU module 1 in the first direction x. Both of these two embodiments can improve the space utilization rate in the third direction z and make the BDU module 1 more compact in structure. The first mounting portion 131 and the second mounting portion 132 can be integrally injection-molded or assembled into one body after being separately molded, and neither affects their function of centrally mounting the pre-charge resistor 21 and the pre-charge relay 22.

[0055] In some embodiments, a first mounting port 13103 may be formed at one end of the first mounting portion 131 close to the bottom plate 11. The first mounting port 13103 is used to assemble the pre-charge resistor 21 into the first chamber 13101, and / or a second mounting port 13202 is provided at one end of the second mounting portion 132 facing away from the bottom plate 11. The second mounting port 13202 is used to assemble the pre-charge relay 22 into the second chamber 13201. In other words, the first mounting port 13103 and the second mounting port 13202 are respectively disposed at the bottom end and the top end of the first mounting base 13 along the third direction z in the figure. Please refer to Figure 7 , Figure 7 which is a schematic diagram of the bottom side structure of the base provided by the embodiment of the present application. In an alternative embodiment, the bottom plate 11 may further be provided with an assembly port 110. One end of the first mounting portion 131 forming the first mounting port 13103 may abut against the edge of the bottom plate 11 for forming the assembly port 110, so that the assembly port 110 can communicate with the first chamber 13101. During the specific assembly of the pre-charge resistor 21 to the first mounting portion 131, the operator can insert the pre-charge resistor 21 into the first chamber 13101 from the side of the bottom plate 11 facing away from the first mounting base 13 through the assembly port 110. By disposing the first mounting port 13103 and the second mounting port 13202 at the bottom end and the top end of the first mounting base 13 along the third direction z respectively, at least one advantage is that it is convenient to complete the assembly of the pre-charge resistor 21 and the pre-charge relay 22 to the first mounting base 13 without disassembling and assembling the first mounting portion 131 and the second mounting portion 132 during the operation.

[0056] Please refer to Figure 8 and Figure 9 , Figure 8 which is a view of the first mounting base provided by the embodiment of the present application in one direction, Figure 9 which is a view of the first mounting base provided by the embodiment of the present application in another direction. The first mounting portion 131 may include a first limiting shell 1311 and a first limiting structure 1312. The first limiting shell 1311 encloses the first chamber 13101. The first limiting shell 1311 includes a first end away from the second mounting portion 132 (i.e., the bottom end of the first mounting base 13), and the first end encloses to form the first mounting port 13103. The first limiting structure 1312 is disposed at the first end for limiting the pre-charge resistor 21 within the first chamber 13101; and / or the second mounting portion 132 may include a second limiting shell 1321 and a second limiting structure 1322. The second limiting shell 1321 encloses the second chamber 13201. The second limiting shell 1321 includes a second end away from the first mounting portion 131 (the top end of the first mounting base 13), and the second end forms the second mounting port 13202. The second limiting structure 1322 is disposed at the second end for limiting the pre-charge relay 22 within the second chamber 13201.

[0057] In other words, the first limiting structure 1312 and the second limiting structure 1322 are respectively disposed at the bottom end and the top end of the first mounting base 13 along the third direction z. The first limiting structure 1312 is disposed at the edge forming the first mounting opening 13103, and the second limiting structure 1322 is disposed at the edge forming the second mounting opening 13202. The pre-charge resistor 21 can be limited within the first chamber 13101 through the first limiting structure 1312, and the pre-charge relay 22 can be limited within the second chamber 13201 through the second limiting structure 1322.

[0058] Please refer to Figure 10 and Figure 11 , Figure 10 is Figure 9 an enlarged schematic view of part B in Figure 11 is Figure 8An enlarged schematic view of part A. In some embodiments, the first limiting structure 1312 may include a first guiding inclined surface 13121 and a first limiting surface 13122. Among them, the first guiding inclined surface 13121 may be disposed on the side of the first limiting structure 1312 facing the bottom plate, that is, the first guiding inclined surface 13121 is disposed away from the first chamber 13101. The first guiding inclined surface 13121 is used to guide the pre-charge resistor 21 to be assembled in the first chamber 13101. The first limiting surface 13122 may be disposed on the side of the first limiting structure 1312 away from the bottom plate, that is, the first limiting surface 13122 is disposed facing the first chamber 13101. The first limiting surface 13122 can abut against the pre-charge resistor 21; and / or the second limiting structure 1322 may include a second guiding inclined surface 13221 and a second limiting surface 13222. Among them, the second guiding inclined surface 13221 is disposed on the side of the second limiting structure 1322 away from the second chamber 13201. The second guiding inclined surface 13221 is used to guide the pre-charge relay 22 to be assembled in the second chamber 13201. The second limiting surface 13222 is disposed on the side of the second limiting structure 1322 facing the second chamber 13201. The second limiting surface 13222 can abut against the pre-charge relay 22. Specifically, the first limiting shell 1311 includes a first inner side surface facing the first chamber 13101, and the first limiting structure 1312 is disposed on the first inner side surface. The second limiting shell 1321 includes a second inner side surface facing the second chamber 13201, and the second limiting structure 1322 is disposed on the second inner side surface. In this specification, the first limiting structure 1312 is taken as an example for schematic description. The specific implementation of the second limiting structure 1322 is similar to that of the first limiting structure 1312, and reference may be specifically made to the relevant description of the first limiting structure 1312 in this specification. Specifically, the first guiding inclined surface 13121 includes two separated sides. One side is connected to the first inner side surface, and the other side is away from the first inner side surface and close to the first limiting surface 13122. Similarly, the first limiting surface 13122 includes two separated sides. One side of the first limiting surface 13122 is connected to the first inner side surface, and the other side of the first limiting surface 13122 is away from the first inner side surface and connected to the other side of the first guiding inclined surface 13121. During the process of assembling the pre-charge resistor 21 into the first mounting portion 131, the pre-charge resistor 21 can slide along the first guiding inclined surface 13121 towards the first chamber 13101, and then slide into the first chamber 13101 from the first mounting opening 13103. Thus, the pre-charge resistor 21 is assembled into the first mounting portion 131. When the pre-charge resistor 21 is affected by gravity or the BDU module 1 is working under vibration, impact or other more complex working conditions, the pre-charge resistor 21 can abut against the first limiting surface 13122, thereby preventing the pre-charge resistor 21 from sliding out of the first chamber 13101 through the first mounting opening 13103.

[0059] Please refer to Figure 8 andFigure 9, in some embodiments, the first limiting shell 1311 may include two relatively arranged first sub-sidewalls 13111, each first sub-sidewall 13111 may be provided with at least a pair of first notches 13112, the first notches 13112 extend from the first installation opening 13103 towards the second installation portion 132, the portion between each pair of first notches 13112 in the first sub-sidewall 13111 forms a first elastic member 13113, and the first limiting structure 1312 protrudes from one end of the first elastic member 13113 close to the bottom plate 11; and / or the second limiting shell 1321 includes two relatively arranged second sub-sidewalls 13211, each second sub-sidewall 13211 is provided with at least a pair of second notches 13212, the second notches 13212 extend from the second installation opening 13202 towards the first installation portion 131, the portion between each pair of second notches 13212 in the second sub-sidewall 13211 forms a second elastic member 13213, and the second limiting structure 1322 protrudes from one end of the second elastic member 13213 away from the bottom plate 11. Exemplarily, each end of the first installation portion 131 may include relatively arranged first sub-sidewalls 13111. Taking one end of the first installation portion 131 as an example, each first sub-sidewall 13111 may be provided with at least a pair of first notches 13112, and the first notches 13112 communicate with the first chamber 13101. Thus, the portion between each pair of first notches 13112 in each first sub-sidewall 13111 can form a first elastic member 13113. In an alternative embodiment, the first notches 13112 of one first sub-sidewall 13111 may be arranged opposite to the first notches 13112 of the other first sub-sidewall 13111, so that the first elastic member 13113 of one first sub-sidewall 13111 is arranged opposite to the first elastic member 13113 of the other first sub-sidewall 13111. During the process of assembling the pre-charge resistor 21 to the first installation portion 131, the pre-charge resistor 21 first slides along the first guiding slope 13121 of the first limiting structure 1312. At the same time, one end of the first elastic member 13113 close to the bottom plate 11 is offset away from the first chamber 13101 due to the interference between the first limiting structure 1312 and the pre-charge resistor 21, so that the pre-charge resistor 21 can slide into the first chamber 13101 from the first installation opening 13103. After the pre-charge resistor 21 is installed in the first chamber 13101, the interference between the pre-charge resistor 21 and the first limiting structure 1312 disappears, and the first elastic member 13113 can then elastically reset towards the first chamber 13101, thereby being able to limit the pre-charge resistor 21 in the first chamber 13101 and preventing it from sliding out of the first chamber 13101 from the first installation opening 13103. The implementation principle of the second elastic member 13213 is similar to that of the first elastic member 13113, and reference can be made to the description of the first elastic member 13113 in this specification.The first mounting base 13 provided in the embodiment of the present application is designed with a first elastic member 13113 on the first sub-side wall 13111 and / or a second elastic member 13213 on the second sub-side wall 13211. During the process of assembling the pre-charge resistor 21 to the first mounting portion 13, the first elastic member 13113 can undergo elastic deformation, and / or during the process of assembling the pre-charge relay 22 to the second mounting portion 13, the second elastic member 13213 can undergo elastic deformation. Compared with the embodiment of the first mounting base 13 without the first elastic member 13113 and / or the second elastic member 13213, the pre-charge resistor 21 and / or the pre-charge relay 22 can be more easily assembled to the first mounting base 13.

[0060] Please refer to Figure 12 and Figure 13 , Figure 12 is an exploded view in one direction among the second mounting base, the conductive element and the collecting element provided in the embodiment of the present application, Figure 13 is an exploded view in another direction among the second mounting base, the conductive element and the collecting element provided in the embodiment of the present application. In some embodiments, the base 10 may further include a second mounting base 14. In addition to the pre-charge assembly, the BDU module 20 may further include a conductive element 23 and other electrical components 24. In some embodiments, the conductive element 23 may be a copper busbar or an aluminum busbar, and the electrical component 24 may be a fuse or a shunt. The second mounting base 14 may be disposed between the electrical component 24 and the conductive element 23, and the conductive element 23 is electrically connected to the electrical component 24 to connect the electrical component 24 to the target circuit of the BDU module 20. The second mounting base 14 may include a mounting surface 1411, a first protrusion 142, and a second protrusion 143. The mounting surface 1411 may include a first side and a second side disposed opposite to each other. The first protrusion 142 is disposed on the first side, and the second protrusion 143 is disposed on the second side. At least a part of the conductive element 23 is disposed between the first protrusion 142 and the second protrusion 143. Specifically, the second mounting base 14 may include a mounting substrate 141. The mounting substrate 141 has a first side and a second side facing away from each other. The first side faces the electrical component 24, and the second side faces the conductive element 23. The mounting surface 1411, the first protrusion 142, and the second protrusion 143 are all disposed on the second side. At least a part of the conductive element 23, for example, one end of the conductive element 23, may be disposed between the first protrusion 142 and the second protrusion 143, thereby restricting the rotation of the conductive element 23 in the plane where the mounting surface 1411 is located. The mounting substrate 141 is provided with a first through hole 1410 penetrating from the first side to the second side, and the electrical connection end of the electrical component 24 may pass through the first through hole 1410 or be located in the first through hole 1410 to facilitate the establishment of an electrical connection between the electrical component 24 and the conductive element 23.

[0061] The BDU module 20 may further include a plurality of acquisition components. The plurality of acquisition components include a first acquisition component 25 and a second acquisition component 26. The first acquisition component 25 and the second acquisition component 26 are electrically connected to the conductive component 23 to obtain some physical signals of the electrical component 24 electrically connected to the conductive component, so as to monitor the working process of the BDU module 20 in real time. In some embodiments, the first acquisition component 25 may include a first fixing piece 251 and a first connection end 252 provided on the first fixing piece 251. The second acquisition component 26 may include a second fixing piece 261 and a second connection end 262 provided on the second fixing piece 261. The conductive component 23 may have a preset length to facilitate the transmission of current between two electrical components 24 electrically connected thereto. The first fixing piece 251 and the second fixing piece 261 may be spaced apart on the surface of the conductive component 23, for example, spaced along the length direction of the conductive component 23. The first connection end 252 and the second connection end 262 may protrude from the conductive component 23 so that the first connection end 252 and the second connection end 262 extend in different directions. For example, the first connection end 252 may extend along the thickness direction of the conductive component 23, and the second connection end 262 may extend along the width direction of the conductive component 23. The first connection end 252 and the second connection end 262 are used as connection ends to electrically connect some signal acquisition wire harnesses. In this application, by arranging the first acquisition component 25 and the second acquisition component 26 with different extending directions of the connection ends on the conductive component 23, thus, part of the signal acquisition wire harnesses can be electrically connected to the conductive component 23 from one direction, and another part of the signal acquisition wire harnesses can be electrically connected to the conductive component 23 from another direction, or the signal acquisition wire harnesses can be selectively connected to the first connection end 252 or the second connection end 262 according to the layout of the electrical component 24 in the BDU module 20, which can meet the wiring requirements in different directions, avoid the accumulation of signal acquisition wire harnesses caused by a single wiring direction, and reduce the situation of local bending of some signal acquisition wire harnesses.

[0062] In some embodiments, the conductive element 23 may include a first assembly surface 231, a second assembly surface 232, and a side surface 233. The first assembly surface 231 and the second assembly surface 232 are arranged to face away from each other. After the conductive element 23 is assembled to the second mounting base 14, the first assembly surface 231 may be the side surface of the conductive element 23 facing the mounting substrate 141. Correspondingly, the second assembly surface 232 may be the other side surface facing away from the mounting substrate 141. The side surface 233 is connected between the first assembly surface 231 and the second assembly surface 232. In the first acquisition member 25 provided in some embodiments of the present application, the first fixing piece 251, the first portion 2521, and the first connection end 252 may be an integrally bent and formed member. The first fixing piece 251 is attached to the first assembly surface 231. The first connection end 252 may include a first portion 2521 close to the first fixing piece 251 and a second portion 2522 away from the first fixing piece 251. The first portion 2521 is attached to the side surface 233, and the second portion 2522 protrudes from the second assembly surface 232 along the side surface 233. In other words, the first portion 2511 is connected between the first fixing piece 251 and the second portion 2522. The first connection end 252 is used to connect a signal acquisition wire harness. When the signal acquisition wire harness is pulled, the first portion 2521 can be closely attached to the side surface 233 of the conductive element 23, thereby effectively restricting the rotation of the first acquisition member 25 relative to the conductive element 23.

[0063] In some embodiments, to adapt to the installation of the conductive element 23 provided with the first acquisition piece, the first protrusion 142 may extend along the first side of the installation surface 1411. There are two second protrusions 143, and the two second protrusions 143 may be arranged at intervals along the second side of the installation surface 1411. A limiting space 1401 is formed between the first protrusion 142 and the two second protrusions 143, and an avoidance space 1402 is formed between the two second protrusions 143. The avoidance space 1402 communicates with the limiting space 1401. The first fixing piece 251 is attached to the first assembly surface 231. In an embodiment where the second mounting base 14 and the conductive element 23 can be assembled and connected to each other, the portion of the conductive element 23 for attaching the first fixing piece 251 can be assembled into the limiting space 1401. After this portion of the conductive element 23 is disposed in the limiting space 1401, the first fixing piece 251 is located between the installation surface 1411 and the first assembly surface 231. The first connection end 252 extends out from the avoidance space 1402 to facilitate connection with the electrical component 24, and the first portion 2521 is located in the avoidance space 1402. By providing two second protrusions 143 spaced apart on the installation surface 1411, the present application embodiment forms an avoidance space 1402 communicating with the limiting space 1401, which can avoid assembly interference between the first acquisition piece and the second mounting base 14, and thus realize the electrical connection between the first acquisition member 25 and the target electrical component 24.

[0064] In the second acquisition component 26 provided in some embodiments of the present application, the second fixing piece 261 is attached to the second assembly surface 232, the second connection end 262 protrudes from the side surface 233 along the second assembly surface 232, the second connection end 262 is used to connect another signal acquisition wire harness, the second acquisition component 26 may further include a second limiting piece 263, the second limiting piece 263 is bent and connected to the second fixing piece 261, and the second limiting piece 263 is attached to the side surface 233. Similar to the first acquisition component 25, the second fixing piece 261, the second limiting piece 263, and the second connection end 262 may also be an integrally bent and formed piece. When the signal acquisition wire harness connected to the second connection end 262 is pulled, the second limiting piece 263 can be closely attached to the side surface 233 of the conductive component 23, and further, it can effectively limit the rotation of the second acquisition component 26 relative to the conductive component 23. In some alternative embodiments, to better limit the rotation of the second acquisition component 26 relative to the conductive component 23, in the second acquisition component 26, two second limiting pieces 263 may be provided. Exemplarily, a second limiting piece 263, the second connection end 262, and another second limiting piece 263 are sequentially arranged at intervals along one side of the second fixing piece 261. When the second acquisition piece rotates relative to the conductive component 23, at least one second limiting piece 263 can abut against the side surface 233 of the conductive component 23, so as to achieve a better effect of limiting its rotation.

[0065] The BDU module 1 may further include two connecting members (not shown in the figures). One connecting member is detachably connected to the first collecting member 25 and the conductive element 23, and the other connecting member is detachably connected to the second collecting member 26 and the conductive element. Specifically, the conductive element 23 may be provided with two second through holes 230. The first fixing piece 251 is provided with a first connection hole 2510, and the second fixing piece 261 is provided with a second connection hole 2610. One connecting member passes through the first connection hole 2510 and one of the second through holes 230 for detachably connecting the first collecting member 25 and the conductive element 23. The other connecting member passes through the second connection hole 2610 and the other second through hole 230 for detachably connecting the second collecting member 26 and the conductive element 23. In some alternative embodiments of the present application, one of the second through holes 230 of the conductive element 23 may be provided at one end of the conductive element 23, and the other second through hole 230 may be provided at the other end of the conductive element 23. Thus, two mounting positions away from each other can be formed in the length direction of the conductive element 23, which is conducive to reducing the interference between different signal collection wire harnesses and ensuring stable and accurate signal transmission. In some embodiments of the present application, the connecting member may be a screw, a bolt, a stud or other suitable threaded member. When a screw is used as the connecting member, the inner wall of the conductive element 23 for forming the second through hole 230 may be provided with internal threads so that the screw can be screwed onto the conductive element 23, thereby firmly connecting the first collecting member and / or the second collecting member to the conductive element 23. In the present application, the detachable connection between the conductive element 23 and the first collecting member 25 and the second collecting member 26 is realized through the threaded member, and thus it is convenient to nickel-plate between the threaded member and the first collecting member and / or the second collecting member, which can effectively avoid various situations such as difficult nickel-plating between the collecting element and the rivet, acid reflux during the electroplating welding process, easy cracking of the coating, easy corrosion of the copper rivet, and non-detachability between the collecting element and the conductive element 23 after the rivet is press-fitted in the related art.

[0066] The present application also provides a battery system, which may include: a battery module and the BDU module 1 provided in any embodiment of the present application, and the battery module is electrically connected to the BDU module 1.

[0067] In summary, the BDU module and the battery system provided by the embodiments of the present application have at least the following beneficial effects: In the first aspect, the pre-charge resistor and the pre-charge relay are arranged along the third direction through the first mounting base, which can reduce the occupied space of the electrical components in the first direction and / or the second direction; In the second aspect, in at least one embodiment of the present application, by arranging the first mounting opening and the second mounting opening at the bottom end and the top end of the first mounting base along the third direction, at least one beneficial aspect is that the operation of assembling the pre-charge resistor and the pre-charge relay can be conveniently completed without disassembling the first mounting part and the second mounting part; In the third aspect, by designing the first elastic member on the first sub-sidewall and / or the second elastic member on the second sub-sidewall, the first elastic member can undergo elastic deformation during the process of assembling the pre-charge resistor to the first mounting part, and / or the second elastic member can undergo elastic deformation during the process of assembling the pre-charge relay to the second mounting part, so that the pre-charge resistor and / or the pre-charge relay can be more easily assembled to the first mounting base; In the fourth aspect, by arranging the first collecting member and the second collecting member with different extending directions of the wiring terminals of the conductive element, the wiring requirements in different directions can be met, the accumulation of the signal collection wire harness caused by the single wiring direction can be avoided, and some situations of local bending of the signal collection wire harness can be reduced; Finally, in the present application, the detachable connection between the conductive element and the first collecting member and the second collecting member can be realized through the threaded member, and it is convenient to nickel-plate between the threaded member and the first collecting piece and / or the second collecting piece, which can effectively avoid various situations such as the difficulty of nickel-plating between the collecting element and the rivet, the acid reflux during the electroplating welding process, the easy cracking of the coating, the easy corrosion of the copper rivet, and the non-detachability between the collecting element and the conductive element after the rivet is press-fitted in the related art.

[0068] The embodiments of the present invention have been described in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A BDU module, characterized in that: include: Base plate; A first mounting base is mounted on the bottom plate; the first mounting base includes a first mounting portion and a second mounting portion, the first mounting portion is arranged on the bottom plate, and the second mounting portion is arranged on a side of the first mounting portion away from the bottom plate; a first chamber is arranged in the first mounting portion, and a second chamber is arranged in the second mounting portion; The pre-charging component includes a pre-charging resistor and a pre-charging relay, wherein the pre-charging resistor is arranged in the first chamber, and the pre-charging relay is arranged in the second chamber; the orthographic projections of the pre-charging resistor and the pre-charging relay in the plane where the base plate is located overlap.

2. The BDU module according to claim 1, characterized in that: The first mounting portion includes two opposite ends and a middle portion connected between the two ends, the second mounting portion is arranged at the middle portion, and a through opening is formed on a side of each end away from the bottom plate; The pre-charging resistor includes a resistor body and two wiring terminals respectively arranged at both ends of the resistor body; the resistor body is accommodated in the first chamber, one of the wiring terminals is located at one of the through openings, and the other wiring terminal is located at the other through opening, and the pre-charging relay and the resistor body overlap with the orthographic projection part of the plane where the bottom plate is located.

3. The BDU module according to claim 1 or 2, characterized in that: A first mounting opening is formed at one end of the first mounting portion close to the bottom plate, and the first mounting opening is used to assemble the pre-charging resistor into the first chamber; and / or, A second mounting opening is provided at one end of the second mounting portion facing away from the bottom plate, and the second mounting opening is used for assembling the pre-charge relay into the second chamber.

4. The BDU module according to claim 3, characterized in that: The first mounting portion includes a first limiting shell and a first limiting structure; the first limiting shell is provided with the first chamber, the first limiting shell includes a first end away from the second mounting portion, the first end forms the first mounting opening; the first limiting structure is provided at the first end, and is used to limit the pre-charge resistor in the first chamber; And / or, the second mounting part includes a second limiting shell and a second limiting structure; the second limiting shell is provided with the second chamber, the second limiting shell includes a second end away from the first mounting part, the second end forms the second mounting port; the second limiting structure is provided at the second end, and is used to confine the pre-charge relay in the second chamber.

5. The BDU module according to claim 4, characterized in that: The first limiting structure is provided with a first guiding inclined surface on a side facing the bottom plate, and the first limiting structure is provided with a first limiting surface on a side facing away from the bottom plate, and the first limiting surface can abut against the pre-charging resistor; And / or, a second guiding slope is provided on the side of the second limiting structure facing away from the second chamber, and a second limiting surface is provided on the side of the second limiting structure facing the second chamber, and the second limiting surface can abut against the pre-charging relay.

6. The BDU module according to claim 4 or 5, characterized in that: The first limiting shell includes two first sub-side walls arranged opposite to each other, each of the first sub-side walls is provided with at least one pair of first notches, the first notches are extended from the first mounting opening toward the second mounting portion, the portion between each pair of the first notches in the first sub-side wall forms a first elastic member, and the first limiting structure is protruded at one end of the first elastic member close to the bottom plate; and / or The second limiting shell includes two oppositely arranged second sub-side walls, each of the second sub-side walls is provided with at least one pair of second notches, the second notches extend from the second mounting opening toward the direction of the first mounting portion, a second elastic member is formed between each pair of the second notches in the second sub-side walls, and the second limiting structure is protruded at one end of the second elastic member away from the bottom plate.

7. The BDU module according to claim 1, characterized in that: The BDU module also includes a second mounting base and a conductive element, the second mounting base includes a mounting surface, a first protrusion and a second protrusion, the mounting surface includes a first edge and a second edge arranged opposite to each other, the first protrusion is arranged on the first edge, the second protrusion is arranged on the second edge, and at least part of the conductive element is arranged between the first protrusion and the second protrusion.

8. The BDU module according to claim 7, characterized in that: The BDU module further includes a plurality of collecting elements, the plurality of collecting elements including a first collecting element and a second collecting element, the first collecting element and the second collecting element being electrically connected to the conductive element; The first collecting member includes a first fixing plate and a first connecting end provided on the first fixing plate, and the second collecting member includes a second fixing plate and a second connecting end provided on the second fixing plate; the first fixing plate and the second fixing plate are spaced apart on the surface of the conductive element, the first connecting end and the second connecting end are protruded from the conductive element, and the first connecting end and the second connecting end are extended in different directions.

9. The BDU module according to claim 8, characterized in that: The conductive element comprises a first assembly surface, a second assembly surface and a side surface, the first assembly surface and the second assembly surface are arranged opposite to each other, and the side surface is connected between the first assembly surface and the second assembly surface; The first fixing sheet is attached to the first assembly surface; The first connecting end includes a first portion close to the first fixing plate and a second portion away from the first fixing plate, the first portion is attached to the side surface, and the second portion protrudes from the second assembly surface along the side surface; and / or, The second fixing piece is attached to the second assembly surface, and the second connection end protrudes from the side surface along the second assembly surface; the second collecting member also includes a second limiting piece, the second limiting piece is bent and connected to the second fixing piece, and the second limiting piece is attached to the side surface.

10. The BDU module according to claim 9, characterized in that: There are two second protrusions, and an escape space is formed between the two second protrusions. The first fixing sheet is located between the installation surface and the first assembly surface, and the first part is located in the escape space.

11. The BDU module according to claim 8 or 9, characterized in that: The BDU module further includes two connecting pieces, one of which is detachably connected to the first collecting piece and the conductive element, and the other of which is detachably connected to the second collecting piece and the conductive element.

12. A battery system, characterized in that: include: Battery module; And the BDU module according to any one of claims 1 to 11, wherein the battery module is electrically connected to the BDU module.

Images