A battery pack

Abstract

This utility model relates to the field of energy storage technology, specifically disclosing a battery pack, comprising: a battery housing, with a first electronic control compartment at one end and a second electronic control compartment at the other end, and a battery compartment between the first and second electronic control compartments; a battery module located within the battery compartment; a BMS slave controller located within the first electronic control compartment and electrically connected to the battery module via a low-voltage acquisition harness; and a BDU component located within the second electronic control compartment and electrically connected to the battery module via a high-voltage busbar. The battery pack provided by this utility model effectively solves the problems of electromagnetic interference, safety hazards, and assembly complexity caused by the extensive mixing of high and low voltage wiring in existing battery packs.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a battery pack. Background Technology

[0002] In power battery systems, the internal structural design of the battery housing has a significant impact on the system's safety, reliability, and electromagnetic compatibility. Currently, common battery housings are typically divided into two main chambers: the battery chamber and the electronic control chamber. The battery chamber houses the battery modules, while the electronic control chamber centrally houses the hardware units of the battery management system (BMS) (such as the BMS master controller, BMS slave controllers), and key components like the battery distribution unit (BDU).

[0003] However, this layout has significant technical drawbacks. The BDU, as a high-voltage component, is typically electrically connected to the battery module via a high-voltage busbar; while the BMS, as a low-voltage control component, requires numerous low-voltage wiring harnesses for signal acquisition and communication with the battery module. When the BDU and BMS (especially BMS slave controllers with multiple sampling lines) are integrated into the same control cavity, effective physical isolation between the high-voltage busbar and the low-voltage wiring harnesses becomes difficult. This mixed high- and low-voltage wiring design leads to the following problems:

[0004] (1) Increased risk of electromagnetic interference: When the high-voltage circuit is working, the electromagnetic noise generated can easily interfere with the low-voltage signal line through coupling, resulting in a decrease in the sampling accuracy of the BMS or communication abnormalities, affecting the real-time monitoring and protection of the battery status.

[0005] (2) Significant safety hazards: The close-range cross arrangement of high-voltage conductors and low-voltage wire harnesses may cause short circuits due to insulation aging or mechanical damage, or even cause high voltage to break down low voltage circuits, threatening system safety.

[0006] (3) Increased complexity of assembly and maintenance: BMS slave control usually requires the connection of a large number of low-voltage acquisition harnesses (such as voltage acquisition lines and temperature sensor lines). When coexisting with high-voltage components, an additional isolation structure needs to be designed, which increases the difficulty of harness layout and the cost of later maintenance.

[0007] Therefore, the existing chamber division method of the battery box is difficult to meet the isolation requirements of high and low voltage components. There is an urgent need to optimize the layout design of the electronic control chamber to reduce electromagnetic interference and electrical risks, while improving assembly efficiency and system reliability.

[0008] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0009] One objective of this invention is to provide a battery pack that effectively solves the problems of electromagnetic interference, safety hazards, and assembly complexity caused by the mixing of high-voltage conductors and a large number of low-voltage wire harnesses in the same chamber in existing battery packs.

[0010] To achieve the above objectives, this utility model provides a battery pack, comprising:

[0011] include:

[0012] A battery housing, wherein a first electronic control compartment is provided at one end of the battery housing and a second electronic control compartment is provided at the other end, and a battery compartment is provided between the first electronic control compartment and the second electronic control compartment;

[0013] A battery module, wherein the battery module is located within the battery compartment;

[0014] The BMS slave controller is located in the first electronic control compartment and is electrically connected to the battery module through a low-voltage acquisition harness.

[0015] The BDU component is located inside the second electronic control compartment and is electrically connected to the battery module via a high-voltage busbar.

[0016] Optionally, the battery compartment is equipped with longitudinal beams.

[0017] Each of the aforementioned longitudinal beams extends from the end of the battery compartment near the first electronic control compartment to the end of the battery compartment near the second electronic control compartment, dividing the battery compartment into a first battery sub-compartment and a second battery sub-compartment; the arrangement direction of the two battery sub-compartments is perpendicular to the length direction of the longitudinal beams of the battery compartment;

[0018] Each of the battery sub-compartments is equipped with a set of battery modules, and each battery module is equipped with a corresponding BMS slave controller.

[0019] Optionally, the longitudinal beam of the housing extends to the edge of the battery housing and divides the second electronic control compartment into a control sub-compartment and a conductive bar sub-compartment. The control sub-compartment corresponds to the first battery sub-compartment along the length direction of the longitudinal beam of the housing, and the conductive bar sub-compartment corresponds to the second battery sub-compartment along the length direction of the longitudinal beam of the housing.

[0020] The width dimensions of the control sub-compartment, the first electrical control compartment, and the conductive busbar sub-compartment decrease in that order. The high-voltage conductive busbars that electrically connect the battery module in the first battery sub-compartment to the BDU component, as well as the BDU component, are all located in the control sub-compartment.

[0021] The high-voltage conductive busbars that electrically connect the battery module in the second battery sub-compartment to the BDU component are arranged sequentially from top to bottom in the conductive busbar sub-compartment.

[0022] Optionally, the control sub-compartment is also equipped with a BMS master controller electrically connected to each of the BMS slave controllers.

[0023] Optionally, the BMS master controller is electrically connected to each of the BMS slave controllers via a low-voltage communication harness;

[0024] One end of the low-voltage communication harness is electrically connected to the BMS main control unit, and the other end enters the first electrical control compartment and is electrically connected to each of the BMS slave controls. The middle section connecting the two ends of the low-voltage communication harness is set along the top surface of the longitudinal beam of the box body.

[0025] Optionally, the battery box is provided with a box beam that separates the first electronic control compartment and the battery compartment;

[0026] The top surface of the box beam is higher than the top surface of the box longitudinal beam, and a cable pass-through port for the low-voltage communication cable harness is provided at the intersection of the box beam and the box longitudinal beam.

[0027] The two sides of the cable passage are arc-shaped, and the opening size gradually decreases towards the longitudinal beam of the box body.

[0028] Optionally, the top surface of the box beam is higher than the top surface of the individual battery cells within the battery module.

[0029] Optionally, the longitudinal beam of the housing, corresponding to the intersection of the control sub-compartment and the conductive bar sub-compartment, has a rounded chamfered avoidance structure on the side facing the edge of the battery housing.

[0030] The rounded chamfered clearance structure is used to avoid the high-voltage conductive busbar;

[0031] The surface of the high-voltage busbar opposite to the chamfered clearance structure is covered with a vibration-damping insulating pad.

[0032] Optionally, the battery module includes a plurality of individual battery cells and a CCS assembly that electrically connects each of the individual battery cells to form a power supply unit.

[0033] The CCS component has an FPC connector for electrical connection to the BMS slave controller at one end near the first electrical control compartment.

[0034] Optionally, the positive terminal of the power supply unit is connected to a positive output bar, and the negative terminal of the power supply unit is connected to a negative output bar.

[0035] Both the positive output switch and the negative output switch are located at one end of the power supply system closer to the second electrical control compartment.

[0036] The beneficial effects of this utility model are as follows: It provides a battery pack in which the BMS slave controller (a low-voltage component involving a large number of low-voltage acquisition harness wiring) and the BDU component (high-voltage component) are independently set in the first and second electrical control compartments, respectively. By physically isolating the high-voltage busbar and the low-voltage acquisition harness, the direct contact between them is completely cut off, realizing the physical high- and low-voltage partitioning. This avoids the coupling interference of electromagnetic noise generated when the high-voltage circuit is working on the low-voltage signal acquisition system, and significantly improves the sampling accuracy and system reliability of the BMS.

[0037] At the same time, this partitioned layout design fundamentally eliminates the safety hazard of high voltage breaking down low voltage circuits due to insulation aging or mechanical damage, greatly improving the overall safety of the battery pack.

[0038] In addition, by arranging high and low voltage components separately, the low voltage acquisition harness and the high voltage conductor busbar can be routed independently, which not only simplifies the complexity of the harness layout, but also reduces the assembly difficulty and maintenance cost, providing convenience for the mass production and subsequent maintenance of the battery pack.

[0039] Therefore, the battery pack provided by this utility model can effectively solve the problems of electromagnetic interference, safety hazards and assembly complexity caused by the large number of mixed high and low voltage wiring in existing battery packs. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the battery pack provided in the embodiment;

[0042] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0043] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;

[0044] Figure 4 for Figure 3 A magnified view of a portion of point C.

[0045] In the picture:

[0046] 1. Battery housing; 101. First electronic control compartment; 102. Battery compartment; 1021. First battery sub-compartment; 1022. Second battery sub-compartment; 103. Second electronic control compartment; 1031. Control sub-compartment; 1032. Conductor bar sub-compartment; 104. Housing longitudinal beam; 1041. Rounded chamfer avoidance structure; 105. Housing crossbeam; 1051. Cable passage; 1052. Rounded shape;

[0047] 2. Battery module; 201. FPC connector; 202. Positive output electrode plate; 203. Negative output electrode plate;

[0048] 3. BMS slave controller;

[0049] 4. BDU components;

[0050] 5. BMS main controller;

[0051] 6. Hall effect sensor;

[0052] 7. Fuse;

[0053] 8. High-voltage busbar;

[0054] 9. Vibration-damping and insulating pads. Detailed Implementation

[0055] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0056] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0057] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0058] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0059] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0060] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0061] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0062] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0063] The battery pack provided by this utility model effectively solves the problems of electromagnetic interference, safety hazards and assembly complexity caused by mixed high and low voltage wiring in the background art through the electronic control partition layout design.

[0064] See Figure 1 The battery pack provided by this utility model includes a battery housing 1, a battery module 2, a BMS slave controller 3, and a BDU component 4.

[0065] The battery box 1 has a first electronic control compartment 101 at one end and a second electronic control compartment 103 at the other end, with a battery compartment 102 between the first electronic control compartment 101 and the second electronic control compartment 103;

[0066] The battery module 2 is located inside the battery compartment 102;

[0067] The BMS slave controller 3 is located inside the first electronic control compartment 101 and is electrically connected to the battery module 2 via a low-voltage acquisition harness.

[0068] The BDU component 4 is located inside the second electronic control compartment 103 and is electrically connected to the battery module 2 via a high-voltage busbar 8.

[0069] In this embodiment, the battery module 2 includes a plurality of individual battery cells and a CCS assembly that electrically connects each of the individual battery cells so that the individual battery cells form a power supply unit.

[0070] CCS (Computer-Controlled System) components typically include an insulating support, several intermediate connecting bars fixed to the insulating support and electrically connecting two adjacent battery cells, and an FPC (Fuel-Conditioned Circuit) component fixed to the insulating support and electrically connecting each connecting bar. Each intermediate connecting bar electrically connects all battery cells into a single power supply unit. A positive output bar 202 is located at the positive terminal of the entire power supply unit, and a negative output bar 203 is located at the negative terminal. The FPC component is a low-voltage component. Figure 2 The FPC connector 201 shown is electrically connected to the BMS slave controller 3; Figure 3 The positive output bar 202 and negative output bar 203 shown are both high-voltage components, electrically connected to the BDU component 4 via the high-voltage busbar 8. The specific composition of the CCS assembly is prior art and not the focus of this utility model, so it will not be described in detail.

[0071] Specifically, the battery pack provided by this utility model independently sets the BMS control unit 3 (a low-voltage component involving a large number of low-voltage acquisition harness wiring) and the BDU component 4 (a high-voltage component) in the first electrical control compartment 101 and the second electrical control compartment 103, respectively. By physically isolating the high-voltage conductor busbar 8, the direct contact between the high-voltage conductor busbar 8 and the low-voltage acquisition harness is completely cut off, realizing the physical high- and low-voltage partitioning. This avoids the coupling interference of electromagnetic noise generated when the high-voltage circuit is working on the low-voltage signal acquisition system, and significantly improves the sampling accuracy and system reliability of the BMS.

[0072] At the same time, this partitioned layout design fundamentally eliminates the safety hazard of high voltage breaking down low voltage circuits due to insulation aging or mechanical damage, greatly improving the overall safety of the battery pack.

[0073] In addition, by arranging the high and low voltage components separately, the low voltage acquisition harness and the high voltage conductor busbar 8 can be routed independently, which not only simplifies the complexity of the harness layout, but also reduces the assembly difficulty and maintenance cost, providing convenience for the mass production and later maintenance of the battery pack.

[0074] Therefore, the battery pack provided by this utility model can effectively solve the problems of electromagnetic interference, safety hazards and assembly complexity caused by the large number of mixed high and low voltage wiring in existing battery packs.

[0075] In this embodiment, the battery compartment 102 is provided with a longitudinal beam 104. Each of the longitudinal beams 104 extends from one end of the battery compartment 102 near the first electronic control compartment 101 to one end of the battery compartment 102 near the second electronic control compartment 103, dividing the battery compartment 102 into a first battery sub-compartment 1021 and a second battery sub-compartment 1022; the arrangement direction of the two battery sub-compartments is perpendicular to the length direction of the longitudinal beam 104. Each battery sub-compartment contains a set of battery modules 2, and each battery module 2 corresponds to one BMS slave controller 3.

[0076] The battery compartment 102 is divided into two independent battery sub-compartments by the longitudinal beams 104 of the box body. This not only enhances the overall structural strength and impact resistance of the battery pack, but also realizes the modular and partitioned arrangement of the battery modules 2. Each battery sub-compartment is equipped with an independent battery module 2 and BMS slave controller 3, which facilitates partitioned maintenance and fault isolation, and effectively avoids the problem of heat diffusion between battery modules 2. This optimizes the thermal management efficiency of the battery pack and improves the reliability and safety of the system.

[0077] Optional, see Figure 3The longitudinal beam 104 of the housing extends to the edge of the battery housing 1 and divides the second electronic control compartment 103 into a control sub-compartment 1031 and a conductive bar sub-compartment 1032. The control sub-compartment 1031 corresponds to the first battery sub-compartment 1021 along the length direction of the longitudinal beam 104 of the housing, and the conductive bar sub-compartment 1032 corresponds to the second battery sub-compartment 1022 along the length direction of the longitudinal beam 104 of the housing.

[0078] The width dimensions of the control sub-compartment 1031, the first electronic control compartment 101, and the conductive busbar sub-compartment 1032 decrease in that order. The high-voltage conductive busbars 8 that electrically connect the battery module 2 in the first battery sub-compartment 1021 to the BDU component 4, as well as the BDU component 4, are all arranged in the control sub-compartment 1031.

[0079] The high-voltage conductive busbars 8 that connect the battery module 2 in the second battery sub-compartment 1022 to the BDU component 4 are arranged sequentially from top to bottom in the conductive busbar sub-compartment 1032.

[0080] For example, the width of the first electrical control compartment 101 is 100mm-200mm, preferably 150mm; the width of the control sub-compartment 1031 is 200mm-250mm, preferably 200mm-250mm; and the width of the conductive bar sub-compartment 1032 is 30mm-50mm.

[0081] Optionally, the control sub-compartment 1031 is also equipped with a BMS master controller 5 electrically connected to each of the BMS slave controllers 3. Furthermore, the BDU component 4 is also equipped with other electrical components such as a Hall sensor 6 and a fuse 7 near the second battery sub-compartment 1022 to improve space utilization.

[0082] The second electrical control compartment 103 is divided into a control sub-compartment 1031 and a conductor busbar sub-compartment 1032 by a stepped width design, which allows the high-voltage conductor busbar 8 and BDU component 4 to be arranged compactly. This not only improves space utilization but also ensures physical isolation between the high-voltage conductor busbar 8 and the low-voltage components, further reducing the risk of electromagnetic interference. At the same time, the independent setting of the conductor busbar sub-compartment 1032 makes the wiring of the high-voltage conductor busbar 8 clearer and more orderly, reducing the complexity of assembly and maintenance.

[0083] By integrating electrical components such as the BMS main controller 5, Hall sensor 6, and fuse 7 into the control sub-compartment 1031, the idle space of the control sub-compartment 1031 is fully utilized, thereby optimizing the component layout density of the electronic control compartment, improving the space utilization of the larger control sub-compartment 1031, and making the battery pack design more compact and efficient.

[0084] Furthermore, the design of the high-voltage conductive busbars 8 arranged sequentially from top to bottom within the conductive busbar sub-compartment 1032 is conducive to making full use of the height space of the conductive busbar sub-compartment 1032, thereby effectively reducing the width dimension of the conductive busbar sub-compartment 1032, thereby increasing the size of the second battery sub-compartment 1022 so as to accommodate more battery cells.

[0085] In this embodiment, the BMS master controller 5 is electrically connected to each of the BMS slave controllers 3 via a low-voltage communication harness; wherein, one end of the low-voltage communication harness is electrically connected to the BMS master controller 5, and the other end enters the first electrical control compartment 101 and is electrically connected to each of the BMS slave controllers 3, and the middle section connecting the two ends of the low-voltage communication harness is set along the top surface of the longitudinal beam 104 of the box body.

[0086] It is understandable that, although placing the BMS main controller 5 in the control sub-compartment 1031 may cause the low-voltage communication harness to be partially mixed with the high-voltage conductor busbar 8, there is only one low-voltage communication harness, and the number is small, so the negative impact is not significant. However, placing the BMS main controller 5 in the control sub-compartment 1031 can greatly improve the space utilization of the battery pack, thereby increasing the energy density. Therefore, considering all factors, this layout is more reasonable.

[0087] Fixing the low-voltage communication harness to the top surface of the longitudinal beam 104 of the enclosure not only avoids mechanical wear of the harness in a vibrating environment, but also minimizes the wiring distance between the BMS master controller 5 and the BMS slave controller 3, reducing the possibility of signal attenuation and external interference, thereby improving the stability and reliability of signal transmission. At the same time, this structured wiring method also makes harness management more standardized and reduces the difficulty of assembly and maintenance.

[0088] Optional, see Figure 2 The battery box 1 is provided with a box beam 105 that separates the first electronic control compartment 101 and the battery compartment 102;

[0089] The top surface of the box beam 105 is higher than the top surface of the box longitudinal beam 104, and a cable passage 1051 for the low-voltage communication cable harness to pass through is provided at the intersection of the box beam 105 and the box longitudinal beam 104.

[0090] The two sides of the cable passage 1051 are arc-shaped 1052, and the opening size gradually decreases towards the longitudinal beam 104 of the box body.

[0091] In this embodiment, the height difference between the top surfaces of the box body crossbeam 105 and the box body longitudinal beam 104 is 5mm-35mm, preferably 10mm-30mm, and more preferably 15mm-25mm, so as to allow the wiring harness to be mounted on the box body longitudinal beam 104.

[0092] By setting the top surface height of the box beam 105 to be higher than that of the box longitudinal beam 104, and setting an arc-shaped cable passage 1051 at the intersection, a natural cable harness limiting structure is formed, which effectively prevents the low-voltage communication cable harness from shifting or wearing out under vibration. At the same time, the arc-shaped 1052 design avoids the risk of the cable harness being cut by sharp edges during passage, further improving the safety and durability of the system.

[0093] Furthermore, the top surface of the box beam 105 is higher than the top surface of each battery cell within the battery module 2. When the box cover is closed, the bottom surface of the cover abuts against the top surface of the box beam 105, leaving a small space between the bottom surface of the cover and the top surface of the battery cells. This prevents the cover from directly pressing down on each cell, which could cause the cells to bulge laterally due to longitudinal pressure. This design ensures structural strength while providing necessary buffer space for the cells, improving the safety and lifespan of the battery pack.

[0094] See Figure 4 In this embodiment, the end of the longitudinal beam 104 of the housing near the intersection of the control sub-compartment 1031 and the conductive busbar sub-compartment 1032 is provided with a rounded chamfered clearance structure 1041 on the side facing the frame of the battery housing 1; the rounded chamfered clearance structure 1041 is used to avoid the high-voltage conductive busbar 8; the surface of the high-voltage conductive busbar 8 opposite to the rounded chamfered clearance structure 1041 is attached with a vibration damping insulating pad 9.

[0095] By setting a rounded chamfered clearance structure 1041 at the top corner of the longitudinal beam 104 of the box body, and attaching a vibration damping insulation pad 9 at the corresponding position of the high voltage conductor 8, the mechanical wear and insulation failure risk of the high voltage conductor 8 under vibration environment is effectively reduced. The rounded chamfer design not only avoids stress concentration, but also reduces the possibility of insulation layer damage caused by vibration friction of the conductor, thereby improving the safety and long-term reliability of the high voltage circuit.

[0096] In existing battery packs, the positive output switch 202, negative output switch 203, and FPC connector 201 are located at the same end of the battery module 2 to accommodate the existing design of mixed high and low voltage wiring. The focus of this invention is to redesign the specific positions of the positive output switch 202, negative output switch 203, and FPC connector 201 to adapt to the separate layout design of the BMS slave controller 3 and the BDU component 4.

[0097] See Figure 2In this embodiment, the FPC connector 201 on the FPC component is positioned at the end of the FPC component near the first electrical control compartment 101, so as to reduce the wiring distance between the FPC connector 201 and the BMS slave controller 3. This not only reduces line loss and interference during signal transmission and improves the accuracy and stability of signal acquisition, but also makes the layout of the low-voltage wiring harness simpler and more efficient, reducing the complexity of assembly and maintenance.

[0098] Accordingly, see Figure 3 By placing both the positive output bar 202 and the negative output bar 203 at one end of the power supply unit near the second electrical control compartment 103, the length of the high-voltage conductor bar 8 is significantly shortened. This not only reduces the material cost of the conductor bar but also reduces the safety hazards of the high-voltage exposed area. At the same time, this design makes the wiring of the high-voltage conductor bar 8 more compact and orderly, further optimizing the space utilization and electrical safety of the battery pack.

[0099] In summary, the battery pack provided in this embodiment has the following advantages:

[0100] ① Physical isolation between high and low voltage: By independently setting up the first electrical control compartment 101 (BMS slave control 3) and the second electrical control compartment 103 (BDU component 4), the contact between high and low voltage lines is completely cut off, eliminating electromagnetic interference and the risk of high voltage breakdown, and improving system reliability.

[0101] ② Modular battery partitioning: The longitudinal beams 104 of the housing divide the battery compartment 102 into two sub-compartments, each equipped with an independent battery module 2 and BMS slave control 3, which enhances the structural strength and achieves thermal isolation, optimizes thermal management and maintenance convenience.

[0102] ③ Stepped electrical control compartment layout: The width of the control sub-compartment 1031 and the conductor sub-compartment 1032 decreases progressively, allowing for a compact arrangement of the high-voltage conductor busbar 8 and electrical components, improving space utilization and maintaining high and low voltage isolation.

[0103] ④ Structured wiring harness management: Low-voltage communication wiring harnesses are fixed to the top surface of the longitudinal beam 104 of the enclosure, which shortens the wiring distance and reduces vibration and wear, thereby improving signal stability and assembly efficiency.

[0104] ⑤ High and low voltage interface optimization: FPC connector 201 is placed close to BMS slave control 3, and output bar is placed close to BDU component 4, which shortens the high and low voltage wiring distance, reduces costs and improves electrical safety.

[0105] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A battery pack, characterized in that, include: A battery housing (1) is provided at one end of a first electronic control compartment (101) and at the other end a second electronic control compartment (103). A battery compartment (102) is provided between the first electronic control compartment (101) and the second electronic control compartment (103). Battery module (2), the battery module (2) is located inside the battery compartment (102); BMS slave controller (3), the BMS slave controller (3) is located in the first electronic control compartment (101) and is electrically connected to the battery module (2) through a low-voltage acquisition harness; BDU component (4), which is located in the second electronic control compartment (103) and is electrically connected to the battery module (2) via a high-voltage busbar (8).

2. The battery pack of claim 1, wherein, The battery compartment (102) is equipped with a box-shaped longitudinal beam (104). Each of the aforementioned box-type longitudinal beams (104) extends from one end of the battery compartment (102) near the first electronic control compartment (101) to one end of the battery compartment (102) near the second electronic control compartment (103), and divides the battery compartment (102) into a first battery sub-compartment (1021) and a second battery sub-compartment (1022); the arrangement direction of the two battery sub-compartments is perpendicular to the length direction of the box-type longitudinal beams (104); Each of the battery sub-compartments is provided with a set of battery modules (2), and each of the battery modules (2) is provided with a corresponding BMS slave controller (3).

3. The battery pack of claim 2, wherein, The longitudinal beam (104) of the housing extends to the edge of the battery housing (1) and divides the second electronic control compartment (103) into a control sub-compartment (1031) and a conductive bar sub-compartment (1032). The control sub-compartment (1031) corresponds to the first battery sub-compartment (1021) along the length direction of the longitudinal beam (104), and the conductive bar sub-compartment (1032) corresponds to the second battery sub-compartment (1022) along the length direction of the longitudinal beam (104). Among them, the width dimensions of the control sub-compartment (1031), the first electrical control compartment (101), and the conductive busbar sub-compartment (1032) decrease in that order. The high-voltage conductive busbars (8) that electrically connect the battery module (2) in the first battery sub-compartment (1021) to the BDU component (4) and the BDU component (4) are all arranged in the control sub-compartment (1031). The high-voltage conductive busbars (8) that connect the battery module (2) in the second battery sub-compartment (1022) to the BDU component (4) are arranged sequentially from top to bottom in the conductive busbar sub-compartment (1032).

4. The battery pack according to claim 3, characterized in that, The control sub-compartment (1031) is also equipped with a BMS master controller (5) that is electrically connected to each of the BMS slave controllers (3).

5. The battery pack of claim 4, wherein, The BMS master controller (5) is electrically connected to each of the BMS slave controllers (3) via a low-voltage communication harness. One end of the low-voltage communication harness is electrically connected to the BMS master controller (5), and the other end enters the first electrical control compartment (101) and is electrically connected to each of the BMS slave controllers (3). The middle section connecting the two ends of the low-voltage communication harness is set along the top surface of the longitudinal beam (104) of the box body.

6. The battery pack of claim 5, wherein, The battery box (1) is provided with a box beam (105) that separates the first electronic control compartment (101) and the battery compartment (102). The top surface of the box beam (105) is higher than the top surface of the box longitudinal beam (104), and a cable pass (1051) is provided at the intersection of the box beam (105) and the box longitudinal beam (104) for the low-voltage communication cable harness to pass through. The two sides of the cable passage (1051) are arc-shaped (1052), and the opening size gradually decreases towards the longitudinal beam (104) of the box body.

7. The battery pack of claim 6, wherein, The top surface of the box beam (105) is higher than the top surface of the individual battery cells in the battery module (2).

8. The battery pack of claim 3, wherein, The end of the longitudinal beam (104) of the box body near the intersection of the control sub-compartment (1031) and the conductive bar sub-compartment (1032) is provided with a rounded chamfer avoidance structure (1041) on one side of the side of the battery box body (1). The rounded chamfered clearance structure (1041) is used to avoid the high voltage conductor (8); The high-voltage conductive busbar (8) has a vibration-damping insulating pad (9) attached to the surface opposite to the rounded chamfered clearance structure (1041).

9. The battery pack of claim 1, wherein, The battery module (2) includes a plurality of individual battery cells and a CCS assembly that electrically connects each of the individual battery cells so that each of the individual battery cells forms a power supply unit. The CCS component is provided with an FPC connector (201) for electrical connection to the BMS slave controller (3) at one end near the first electrical control compartment (101).

10. The battery pack of claim 9, wherein, The positive terminal of the power supply unit is connected to a positive output bar (202), and the negative terminal of the power supply unit is connected to a negative output bar (203). Both the positive output bar (202) and the negative output bar (203) are located at one end of the power supply system closer to the second electrical control compartment (103).

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