Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack, which has a first direction, a second direction and a third direction which are intersected pairwise, and comprises a shell, a box body, a battery cell group, a battery distribution unit, a battery management system master controller and a battery management system slave controller, a first mounting space is formed in the shell; the battery distribution unit and the battery management system master controller are connected with each other and are arranged in the first mounting space; the box body comprises two first edge beams, two second edge beams, a first bottom plate and a cover body, and the two first edge beams, the two second edge beams, the first bottom plate and the cover body define a second mounting space; the battery cell group and the battery management system slave controller are arranged in the second mounting space, and the battery management system slave controller is respectively connected with the battery cell group and the battery management system master controller; the battery management system is connected to the side, facing the second installation space, of the first edge beam in a slave control mode. The battery pack provided by the utility model solves the problem that the arrangement space of the battery cells in the battery pack is limited.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack. Background Technology

[0002] Battery packs provide stable, high-energy-density DC power for electric vehicles, energy storage systems, and portable electronic devices. Battery pack design is crucial for achieving efficient, safe, and economical battery use. The capacity of a battery pack is limited by the number of battery cells. In addition to the cell modules, a battery pack includes a battery control system, which comprises a Battery Distribution Unit (BDU) and a Battery Management System (BMS). The BDU is typically located at the front of the battery pack, sharing the same space as the cells. Since the available space for the battery pack on a vehicle is limited by the vehicle's dimensions, the area available for cell placement is also limited. The presence of the battery control system further reduces this space, thus limiting the number of cells the battery pack can accommodate. How to maximize the number of cells within a limited space has always been a key concern in the industry. Utility Model Content

[0003] In view of this, the present invention provides a battery pack to solve the problem of limited space for battery cell installation within the battery pack.

[0004] The battery pack provided by this utility model has a first direction, a second direction and a third direction that intersect each other, and includes: a shell, a housing, a cell group, a battery distribution unit, a battery management system master controller and a battery management system slave controller;

[0005] The housing has a first installation space;

[0006] The battery distribution unit and the main controller of the battery management system are interconnected and located in the first installation space;

[0007] The enclosure is located on one side of the shell along a third direction; the enclosure includes two first side beams, two second side beams, a first bottom plate, and a cover; the two first side beams are arranged opposite each other along a second direction, and the two second side beams are arranged opposite each other along a first direction. The two first side beams and the two second side beams are connected end to end to form a frame. The cover is connected to one side of the frame along a third direction, and the side of the cover away from the frame is connected to the shell; the first bottom plate is connected to the side of the frame away from the cover. The two first side beams, the two second side beams, the first bottom plate, and the cover form a second installation space.

[0008] The battery cell pack and the battery management system slave controller are located in the second installation space, and the battery management system slave controller is connected to the battery cell pack and the battery management system master controller respectively.

[0009] The battery management system is connected to the side of the first side beam facing the second installation space.

[0010] Beneficial Effects: The battery pack provided by this utility model forms a first installation space and a second installation space by dividing the battery pack box structure into layers along the third direction Z. The first installation space is suitable for accommodating the battery distribution unit and the main controller of the battery management system, while the second installation space is suitable for accommodating the cell group and the slave controller of the battery management system. Moreover, the slave controller of the battery management system is connected to the side of the first side beam facing the second installation space along the second direction Y. On the one hand, it can provide better support and protection for the slave controller of the battery management system. In the event of a collision, the energy can be better absorbed and dispersed through the first side beam, improving the stability of the overall battery pack system. On the other hand, the slave controller of the battery management system can be installed as an independent module on the first side beam, which is convenient for replacement and maintenance. Furthermore, it can make more efficient use of the cell installation space in the second installation space, thereby leaving more installation space for the cells, optimizing the overall layout and structure of the battery pack, and thus solving the problem of limited space for cell installation in the battery pack.

[0011] In one optional embodiment, the battery management system includes a housing and a plurality of first locking parts. At least one first locking part is provided on each of the two opposite sides of the housing along a first direction. A first side beam has a plurality of second locking parts, which are provided on the side of the first side beam facing the housing along a second direction, and the second locking parts are provided opposite to the first locking parts along the second direction. The second locking parts and the first locking parts are detachably connected by a first fastener.

[0012] Beneficial effects: By detachably connecting the first locking part and the second locking part, the battery management system slave lock is locked to the side of the first side beam facing the second mounting space along the second direction Y. On the one hand, it is convenient for maintenance personnel to inspect, maintain and replace the battery management system slave lock. On the other hand, the first side beam can serve as the main energy absorption area of ​​the battery pack and the vehicle, which can better absorb and disperse energy in the event of a collision, protecting the battery management system slave lock from damage. Furthermore, it can free up more installation space for the cells in the second mounting space of the battery pack, making the battery pack design more compact and efficient.

[0013] In one alternative embodiment, the first locking part has a first through hole extending along the second direction; the first side beam has a first screw hole, the first screw hole extends along the second direction and forms a second locking part, and the first fastener passes through the first through hole along the second direction and is threadedly connected to the first screw hole.

[0014] Beneficial effects: During installation, the battery management system slave controller and the first side beam abut against each other along the second direction Y. At the same time, multiple first through holes and multiple first screw holes are aligned one by one. The first fastener passes through the first through hole and is threaded into the first screw hole, thereby realizing the detachable connection between the battery management system slave controller and the first side beam. When disassembling and maintaining, the first fastener can be loosened and removed first, thereby disengaging the battery management system slave controller from the first side beam.

[0015] In one alternative embodiment, a rib is provided on the side of the first side beam facing the battery pack along the second direction. The rib is integrally formed with the second locking part and abuts against the outer shell.

[0016] Beneficial effects: By setting ribs on the side of the first side beam facing the cell pack along the second direction Y, the rigidity and bending and torsional resistance of the first side beam can be enhanced, thereby strengthening the structural strength of the entire battery pack and the entire vehicle chassis. On the other hand, in the event of a frontal collision, the first side beam and ribs can absorb and disperse the impact energy, thereby protecting the cell pack and the battery management system from damage. Furthermore, the ribs are integrally formed with the second locking part, thereby ensuring the secure installation of the battery management system on the first side beam.

[0017] In one optional embodiment, the housing further includes a second bottom plate; the second bottom plate is disposed in the second installation space, the second bottom plate and the first bottom plate are spaced apart along a third direction to form a first exhaust channel, and the second bottom plate is provided with a plurality of first exhaust holes that pass through it along a third direction, and the first exhaust holes are connected to the first exhaust channel.

[0018] The battery cell assembly is bonded to the side of the second base plate facing away from the first exhaust channel along the third direction. The battery cell assembly includes multiple battery cells arranged along the first direction. Each battery cell is provided with a first explosion-proof valve on the side facing the first exhaust channel along the third direction. Multiple first exhaust holes and multiple first explosion-proof valves are arranged opposite each other along the third direction.

[0019] Beneficial effects: By dividing the battery pack housing into three layers along the Z-axis to form a first installation space, a second installation space, and a first exhaust channel, the first installation space is suitable for accommodating the battery distribution unit and the main controller of the battery management system, while the second installation space is suitable for accommodating the cell assembly and the slave controller of the battery management system. The first exhaust channel can serve as a thermal runaway gas exhaust channel, which not only directs high-temperature gas away from the main controller of the battery management system, reducing the heat radiation and damage to key electrical components, but also allows for more efficient use of the cell installation space in the second installation space, thus leaving more installation space for the cells and further optimizing the overall layout and structure of the battery pack.

[0020] In one optional embodiment, a cover portion is provided on the side of the first side beam facing the battery management system slave control along the second direction. The cover portion is connected to one end of the battery management system slave control along the second direction, and the cover portion and the first side beam together form a second exhaust channel, which is connected to the first exhaust channel. One end of the cover portion along the third direction is connected to the first side beam, and the other end is connected to the edge portion of the second base plate along the second direction.

[0021] The first side beam has a through second exhaust hole along the second direction, and the second exhaust hole, the second exhaust channel and the first exhaust channel are connected.

[0022] The battery pack also includes a second explosion-proof valve, which is located on the side of the first side beam away from the cover in the second direction and blocks the second vent.

[0023] Beneficial effects: The second exhaust channel is formed by the enclosure and the first side beam, and the second exhaust hole is sealed by the second explosion-proof valve. When thermal runaway occurs in the battery pack, the first explosion-proof valve opens, and the thermal runaway gas is discharged from the first exhaust hole into the first exhaust channel, and then from the first exhaust channel into the second exhaust channel. The second explosion-proof valve opens, thereby timely discharging the thermal runaway gas to the outside of the battery pack, avoiding the accumulation of thermal runaway gas inside the battery pack, and avoiding the risk of structural damage or explosion due to excessive pressure.

[0024] In one optional embodiment, the housing includes a first wall, a second wall, and a third wall. The second wall is connected to a first side beam via the first wall on one side along a third direction, and the first wall, the second wall, and the first side beam together enclose a second exhaust channel.

[0025] The third wall is connected to the second wall at one end along the second direction, and extends away from the first side beam at the other end; the third wall is connected to the second base plate on one side along the third direction.

[0026] The battery management system is connected to the second wall.

[0027] Beneficial effects: The casing includes a first wall, a second wall, and a third wall. The first and second walls, together with the first side beam, form a second exhaust channel, which connects the first exhaust channel to the second exhaust port, thereby timely venting the thermal runaway gas generated by the abnormal cell to the outside of the battery and avoiding the risk of explosion due to the accumulation of internal pressure in the battery pack. The third wall is set at an angle to the second wall and can overlap with the first base plate, thereby preventing the first base plate from collapsing along the third direction Z towards the second base plate and ensuring that the first exhaust channel and the second exhaust channel remain unobstructed. At the same time, the third wall can also support the battery management system from the control direction Z, and the second wall can support and protect the battery management system from the control direction Y.

[0028] In one optional embodiment, the battery management system includes a housing and a plurality of third locking parts, which are disposed on the side of the housing near the first side beam along a second direction and are spaced apart from each other; the first wall is provided with a plurality of fourth locking parts, which are disposed opposite to the plurality of third locking parts along a third direction; the third locking parts and the fourth locking parts are detachably connected by a second fastener.

[0029] Beneficial effects: When installing the battery management system slave control, the third wall can support the battery management system slave control along the third direction Z, and the second wall can support and protect the battery management system slave control along the second direction Y. The first wall and the third locking part are detachably connected by the second fastener, thereby locking the battery management system slave control onto the first side beam. This allows for more effective use of the cell installation space in the second installation space, further optimizing the overall layout and structure of the battery pack.

[0030] In one alternative embodiment, the third locking part has a second through hole extending in a third direction;

[0031] The first wall is provided with a second screw hole extending in a third direction;

[0032] The second fastener passes through the second through hole in a third direction and is threaded into the second screw hole.

[0033] Beneficial effects: During installation, the battery management system slave controller can be directly inserted into the second installation space along the third direction Z. At the same time, multiple second screw holes and multiple second through holes are aligned one by one. The second fastener passes through the second through hole and is threadedly connected to the second screw hole along the third direction Z. This not only enables the detachable connection between the battery management system slave controller and the first side beam, but also makes the installation and removal of the battery management system slave controller more convenient.

[0034] In one alternative implementation, along a third direction, the orthographic projection of the battery management system onto the first base plate at least partially overlaps with the orthographic projection of the housing onto the first base plate.

[0035] Beneficial effects: This shortens the connection distance between the slave controller and the master controller of the battery management system, which not only simplifies wiring and reduces the complexity of wiring harnesses in the battery pack, but also reduces installation difficulty and cost. In addition, the shorter connection distance can reduce signal transmission delay, improve system response speed, and facilitate real-time monitoring and control of the cell pack's working status. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a top view of a battery pack according to an embodiment of the present utility model;

[0038] Figure 2 for Figure 1 Sectional view of section AA;

[0039] Figure 3 This is a top view of the first and second side beams of a battery pack according to an embodiment of the present utility model;

[0040] Figure 4 An exploded view of a battery management system for a battery pack according to an embodiment of the present invention, showing the first locking form of the first side beam;

[0041] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point C in the middle;

[0042] Figure 6 for Figure 4 A three-dimensional view of the first type of battery management system with locking mechanism shown in the figure;

[0043] Figure 7 for Figure 2 A magnified schematic diagram of the local structure at point B;

[0044] Figure 8 for Figure 7 A magnified schematic diagram of the local structure at point E;

[0045] Figure 9An exploded view of a battery management system for a battery pack according to an embodiment of the present invention, showing a second locking configuration between the controller and the first side beam;

[0046] Figure 10 for Figure 9 A magnified schematic diagram of the local structure at point D;

[0047] Figure 11 for Figure 9 The second type of battery management system shown is a three-dimensional diagram of the control system.

[0048] Explanation of reference numerals in the attached figures:

[0049] 10. Housing; 101. First installation space;

[0050] 20. Enclosure; 201. Second installation space; 202. First exhaust channel; 21. First side beam; 2101. Second exhaust channel; 2102. Second exhaust port; 211. Second locking part; 2111. First screw hole; 212. Rib; 213. Cover part; 2130. Second screw hole; 2131. First wall; 2132. Second wall; 2133. Third wall; 214. Fourth locking part; 22. Second side beam; 23. First bottom plate; 24. Second bottom plate; 241. First exhaust port; 25. Second explosion-proof valve; 26. Cover;

[0051] 31. Battery distribution unit; 32. Battery management system master controller; 33. Cell pack; 330. Battery cell; 331. First explosion-proof valve; 34. Battery management system slave controller; 340. Housing; 341. First locking part; 3411. First through hole; 342. Third locking part; 3421. Second through hole;

[0052] 41. First fastener; 42. Second fastener;

[0053] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0055] The following is combined with Figures 1 to 11 The following describes embodiments of the present invention.

[0056] According to an embodiment of the present invention, a battery pack is provided, having a first direction X, a second direction Y and a third direction Z intersecting in pairs, including: a shell 10, a housing 20, a cell group 33, a battery distribution unit 31, a battery management system master controller 32 and a battery management system slave controller 34;

[0057] Please see Figure 2 As shown, the housing 10 has a first installation space 101;

[0058] The battery distribution unit 31 and the battery management system main controller 32 are interconnected and located in the first installation space 101;

[0059] The housing 20 is located on one side of the shell 10 along the third direction Z; (Please combine this with other components.) Figure 2 , Figure 3 and Figure 7 As shown, the housing 20 includes two first side beams 21, two second side beams 22, a first bottom plate 23, and a cover 26. The two first side beams 21 are arranged opposite each other along the second direction Y, and the two second side beams 22 are arranged opposite each other along the first direction X. The two first side beams 21 and the two second side beams 22 are connected end to end to form a frame. In this embodiment, the frame has a square structure. The cover 26 is connected to one side of the frame along the third direction Z, and the side of the cover 26 away from the frame is connected to the housing 10. The first bottom plate 23 is connected to the side of the frame away from the cover 26. The two first side beams 21, the two second side beams 22, the first bottom plate 23, and the cover 26 form a second installation space 201.

[0060] The battery cell pack 33 and the battery management system slave controller 34 are disposed in the second installation space 201, and the battery management system slave controller 34 is connected to the battery cell pack 33 and the battery management system master controller 32 respectively.

[0061] The battery management system is connected to the side of the first side beam 21 facing the second installation space 201 via the control 34.

[0062] The battery pack provided by this utility model forms a first installation space 101 and a second installation space 201 by dividing the battery pack box structure into layers along the third direction Z. The first installation space 101 is suitable for accommodating the battery distribution unit 31 and the main controller 32 of the battery management system. The second installation space 201 is suitable for accommodating the cell group 33 and the slave controller 34 of the battery management system. Moreover, the slave controller 34 of the battery management system is locked to the side of the first side beam 21 along the second direction Y towards the second installation space 201. On the one hand, it can provide better support and protection for the slave controller 34 of the battery management system. In the event of a collision, the first side beam 21 can better absorb and disperse energy, thereby improving the stability of the overall battery pack system. On the other hand, the slave controller 34 of the battery management system can be installed as an independent module on the first side beam 21, which is convenient for replacement and maintenance. Furthermore, it can make more efficient use of the cell installation space in the second installation space 201, thereby leaving more installation space for the cell group 33, optimizing the overall layout and structure of the battery pack, and thus solving the problem of limited space for cell installation in the battery pack.

[0063] In some embodiments, see Figure 6 As shown, the battery management system controller 34 includes a housing 340 and a plurality of first locking parts 341. At least one first locking part 341 is provided on each of the opposite sides of the housing 340 along the first direction X. Please refer to the diagram for further details. Figure 4 and Figure 5 As shown, the first side beam 21 is provided with a plurality of second locking parts 211 on the side facing the outer shell 340 along the second direction Y. The second locking parts 211 and the first locking parts 341 are arranged opposite to each other along the second direction Y. The second locking parts 211 are integrally formed with the first side beam 21. The second locking parts 211 and the first locking parts 341 are detachably connected by a first fastener 41, wherein the first fastener 41 can be a screw.

[0064] In this embodiment, by detachably connecting the first locking part 341 and the second locking part 211, the battery management system slave controller 34 is locked to the side of the first side beam 21 facing the second mounting space 201 along the second direction Y. This facilitates the inspection, maintenance, and replacement of the battery management system slave controller 34 by maintenance personnel. On the other hand, the first side beam 21 can serve as the main energy absorption area for the battery pack and the vehicle, better absorbing and dispersing energy in the event of a collision, protecting the battery management system slave controller 34 from damage. Furthermore, it frees up more installation space for the battery cells in the second mounting space 201 of the battery pack, making the battery pack design more compact and efficient.

[0065] In some embodiments, the second locking portion 211 may be formed by the first side beam 21 extending along the second direction Y toward the direction close to the second mounting space 201, and the second locking portion 211 may be integrally formed with the first side beam 21.

[0066] Furthermore, the first locking part 341 and the outer shell 340 are integrally formed.

[0067] In some embodiments, see Figure 6 As shown, the first locking part 341 has a first through hole 3411 extending through the first locking part 341 along the second direction Y; please refer to the diagram. Figure 4 and Figure 5 As shown, a first screw hole 2111 is formed on the first side beam 21. The first screw hole 2111 is located on the side of the first side beam 21 facing the second mounting space 201, and the first screw hole 2111 extends along the second direction Y. The first fastener 41 passes through the first through hole 3411 along the second direction Y and is threadedly connected to the first screw hole 2111 to fix the first locking part 341 on the first side beam 21, thereby fixing the battery management system slave 34 on the first side beam 21.

[0068] In this embodiment, during installation, the battery management system slave controller 34 and the first side beam 21 abut against each other along the second direction Y. At the same time, multiple first through holes 3411 and multiple first screw holes 2111 are aligned one by one. The first fastener 41 passes through the first through hole 3411 and is threaded into the first screw hole 2111, thereby realizing the detachable connection between the battery management system slave controller 34 and the first side beam 21. When disassembling and maintaining, the first fastener 41 can be loosened and removed first, thereby disengaging the battery management system slave controller 34 from the first side beam 21.

[0069] In some embodiments, see Figure 5 As shown, the first side beam 21 is also provided with a rib 212 on the side facing the battery cell assembly 33 along the second direction Y. The rib 212 is integrally formed with the second locking part 211 and abuts against the outer shell 340.

[0070] In this embodiment, by providing ribs 212 on the side of the first side beam 21 facing the cell assembly 33 along the second direction Y, the rigidity and bending and torsional resistance of the first side beam 21 can be enhanced, thereby strengthening the structural strength of the entire battery pack and the entire vehicle chassis. On the other hand, in the event of a frontal collision, the first side beam 21 and ribs 212 can absorb and disperse the impact energy, thereby protecting the cell assembly 33 and the battery management system slave controller 34 from damage. Furthermore, the ribs 212 are integrally formed with the second locking part 211, thereby ensuring the secure installation of the battery management system slave controller 34 on the first side beam 21.

[0071] Furthermore, the first side beam 21 and its second locking part 211 and rib 212 can be integrally die-cast.

[0072] In some embodiments, see Figure 7As shown, the housing 20 also includes a second bottom plate 24; the second bottom plate 24 is disposed in the second installation space 201 and parallel to the first bottom plate 23. The second bottom plate 24 and the first bottom plate 23 are spaced apart along the third direction Z to form a first exhaust channel 202. The second bottom plate 24 is provided with a plurality of first exhaust holes 241 that penetrate it along the third direction Z. The first exhaust holes 241 are connected to the first exhaust channel 202.

[0073] The cell assembly 33 is bonded to the second base plate 24 on the side opposite to the first exhaust channel 202 along the third direction Z. The cell assembly 33 includes a plurality of battery cells 330 arranged along the first direction X. Each battery cell 330 is provided with a first explosion-proof valve 331 on the side facing the first exhaust channel 202 along the third direction Z. A plurality of first exhaust holes 241 and a plurality of first explosion-proof valves 331 are arranged opposite to each other along the third direction Z 241 241.

[0074] In this embodiment, the battery pack housing is divided into three layers along the Z-direction to form a first installation space 101, a second installation space 201, and a first exhaust channel 202. The first installation space 101 is suitable for accommodating the battery distribution unit 31 and the main controller 32 of the battery management system. The second installation space 201 is suitable for accommodating the cell group 33 and the slave controller 34 of the battery management system. The first exhaust channel 202 can serve as a thermal runaway gas exhaust channel, which can not only directly guide the high-temperature gas away from the main controller 32 of the battery management system, reducing the heat radiation and damage to key electrical components, but also make more efficient use of the cell installation space in the second installation space 201, thereby leaving more installation space for the cells and further optimizing the overall layout and structure of the battery pack.

[0075] In some embodiments, see Figure 7 As shown, a cover portion 213 is provided on the side of the first side beam 21 facing the control 34 of the battery management system along the second direction Y. The cover portion 213 is connected to one end of the control 34 of the battery management system along the second direction Y, and the cover portion 213 and the first side beam 21 together form a second exhaust channel 2101. One end of the cover portion 213 along the third direction Z is connected to the first side beam 21, and the other end is connected to the edge portion of the second base plate 24 along the second direction Y.

[0076] The first side beam 21 has a through second exhaust hole 2102 along the second direction Y, and the second exhaust hole 2102, the second exhaust channel 2101 and the first exhaust channel 202 are connected.

[0077] The battery pack also includes a second explosion-proof valve 25, which is disposed on the side of the first side beam 21 away from the cover portion 213 along the second direction Y and blocks the second vent 2102.

[0078] In this embodiment, the second exhaust channel 2101 is formed by the enclosure 213 and the first side beam 21, and the second exhaust port 2102 is blocked by the second explosion-proof valve 25. When the cell group 33 experiences thermal runaway, the first explosion-proof valve 331 opens, and the thermal runaway gas is discharged from the first exhaust port 241 into the first exhaust channel 202, and then from the first exhaust channel 202 into the second exhaust channel 2101. The second explosion-proof valve 25 opens, thereby timely discharging the thermal runaway gas to the outside of the battery pack, avoiding the accumulation of thermal runaway gas inside the battery pack, and avoiding the risk of structural damage or explosion due to excessive pressure.

[0079] Furthermore, the cover portion 213 and the first side beam 21 are integrally formed structures.

[0080] In some embodiments, see Figure 8 and Figure 10 As shown, the housing 213 includes a first wall 2131, a second wall 2132 and a third wall 2133. The second wall 2132 is connected to the first side beam 21 through the first wall 2131 on the third side along the Z direction. The first wall 2131, the second wall 2132 and the first side beam 21 together enclose and form a second exhaust channel 2101.

[0081] The third wall 2133 is connected to the second wall 2132 at one end along the second direction Y, and extends in the direction away from the first side beam 21 at the other end; the third wall 2133 is connected to the second base plate 24 on one side along the third direction Z.

[0082] The battery management system is connected to the control unit 34 and the second wall 2132.

[0083] In this embodiment, the casing 213 includes a first wall 2131, a second wall 2132, and a third wall 2133. The first wall 2131 and the second wall 2132, together with the first side beam 21, form a second exhaust channel 2101. This second exhaust channel 2101 connects the first exhaust channel 202 to the second exhaust port 2102, thereby timely venting the thermal runaway gas generated by the abnormal battery cell to the outside of the battery, preventing the risk of explosion due to pressure buildup inside the battery pack. The third wall 2133 is set at an angle to the second wall 2132. The third wall 2133 can overlap with the first base plate 23, thereby preventing the first base plate 23 from collapsing along the third direction Z towards the second base plate 24, and ensuring that the first exhaust channel 202 and the second exhaust channel 2101 remain unobstructed. At the same time, the third wall 2133 can also support the battery management system control 34 along the third direction Z, and the second wall 2132 can support and protect the battery management system control 34 along the second direction Y.

[0084] Furthermore, the first base plate 23 and the third wall 2133 can be fixed by adhesive bonding, or the first base plate 23 and the third wall 2133 can be connected by bolts and / or screws.

[0085] In some embodiments, see Figure 11 As shown, the battery management system controller 34 includes a housing 340 and a plurality of third locking parts 342. The plurality of third locking parts 342 are disposed on the side of the housing 340 along the second direction Y near the first side beam 21 and are spaced apart from each other. The first wall 2131 is provided with a plurality of fourth locking parts 214, and the fourth locking parts 214 and the third locking parts 342 are disposed opposite to each other along the third direction Z. The third locking parts 342 and the fourth locking parts 214 are detachably connected by a second fastener 42.

[0086] In this embodiment, when the battery management system slave controller 34 is installed, the third wall 2133 can support the battery management system slave controller 34 along the third direction Z, and the second wall 2132 can support and protect the battery management system slave controller 34 along the second direction Y. The first wall 2131 provides a locking position, and the fourth locking part 214 and the third locking part 342 are detachably connected through the second fastener 42, thereby locking the battery management system slave controller 34 onto the first side beam 21. This allows for more effective utilization of the cell installation space in the second installation space 201, further optimizing the overall layout and structure of the battery pack.

[0087] In some embodiments, see Figure 10 As shown, the third locking part 342 has a second through hole 3421 extending through the third direction Z;

[0088] The first wall 2131 is provided with a second screw hole 2130 extending in the third direction Z; the second screw hole 2130 forms a fourth locking part 214;

[0089] The second fastener 42 passes through the second through hole 3421 along the third direction Z and is threaded into the second screw hole 2130.

[0090] In this embodiment, during installation, the battery management system slave controller 34 can be directly inserted into the second installation space 201 along the third direction Z. At the same time, multiple second screw holes 2130 and multiple second through holes 3421 are aligned one by one. The second fastener 42 passes through the second through hole 3421 and is threadedly connected to the second screw hole 2130 along the third direction Z. This not only enables the detachable connection between the battery management system slave controller 34 and the first side beam 21, but also makes the installation and removal of the battery management system slave controller 34 more convenient.

[0091] The second screw hole 2130 can be a through hole penetrating the first wall 2131 or a blind hole.

[0092] Furthermore, the first side beam 21 and its fourth locking part 214 and rib 212 can be integrally die-cast.

[0093] In some embodiments, please combine Figure 2 and Figure 7 As shown, along the third direction Z, the orthographic projection of the battery management system slave controller 34 on the first base plate 23 at least partially overlaps with the orthographic projection of the housing 10 on the first base plate 23, thereby shortening the connection distance between the battery management system slave controller 34 and the battery management system master controller 32. This not only simplifies wiring, reduces the complexity of wiring harnesses in the battery pack, and reduces installation difficulty and cost, but also reduces signal transmission delay and improves system response speed, which is beneficial for real-time monitoring and control of the working status of the cell pack 33.

[0094] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having intersecting first directions (X), second directions (Y), and a third direction (Z), characterized in that, include: The battery casing (10), housing (20), battery cell pack (33), battery distribution unit (31), battery management system master controller (32) and battery management system slave controller (34); The housing (10) has a first installation space (101); The battery distribution unit (31) and the battery management system main controller (32) are interconnected and disposed in the first installation space (101); The housing (20) is disposed on one side of the shell (10) along the third direction (Z); wherein, the housing (20) includes two first side beams (21), two second side beams (22), a first bottom plate (23), and a cover (26); the two first side beams (21) are arranged opposite each other along the second direction (Y), the two second side beams (22) are arranged opposite each other along the first direction (X), the two first side beams (21) and the two second side beams (22) are connected end to end to form a frame, the cover (26) is connected to one side of the frame along the third direction (Z), and the side of the cover (26) away from the frame is connected to the shell (10); the first bottom plate (23) is connected to the side of the frame away from the cover (26), the two first side beams (21), the two second side beams (22), the first bottom plate (23), and the cover (26) form a second installation space (201); The battery cell assembly (33) and the battery management system slave controller (34) are disposed in the second installation space (201), and the battery management system slave controller (34) is connected to the battery cell assembly (33) and the battery management system master controller (32) respectively; The battery management system is connected from the control (34) to the side of the first side beam (21) facing the second mounting space (201).

2. The battery pack according to claim 1, characterized in that, The battery management system slave controller (34) includes a housing (340) and a plurality of first locking parts (341). At least one first locking part (341) is provided on each of the opposite sides of the housing (340) along the first direction (X). The first side beam (21) has a plurality of second locking parts (211). The second locking parts (211) are provided on the side of the first side beam (21) facing the housing (340) along the second direction (Y), and the second locking parts (211) and the first locking parts (341) are provided opposite to each other along the second direction (Y). The second locking parts (211) and the first locking parts (341) are detachably connected by a first fastener (41).

3. The battery pack according to claim 2, characterized in that, The first locking part (341) has a first through hole (3411) extending along the second direction (Y); the first side beam (21) has a first screw hole (2111), the first screw hole (2111) extends along the second direction (Y) and forms the second locking part (211); the first fastener (41) passes through the first through hole (3411) along the second direction (Y) and is threadedly connected to the first screw hole (2111).

4. The battery pack according to claim 2, characterized in that, The first side beam (21) is also provided with a rib (212) on the side facing the battery cell assembly (33) along the second direction (Y). The rib (212) is integrally formed with the second locking part (211) and abuts against the outer shell (340).

5. The battery pack according to claim 1, characterized in that, The housing (20) also includes a second base plate (24); the second base plate (24) is disposed in the second installation space (201), the second base plate (24) and the first base plate (23) are spaced apart along the third direction (Z) to form a first exhaust channel (202), the second base plate (24) is provided with a plurality of first exhaust holes (241) that pass through it along the third direction (Z), and the first exhaust holes (241) are connected to the first exhaust channel (202); The cell assembly (33) is bonded to the second base plate (24) on the side away from the first exhaust channel (202) along the third direction (Z). The cell assembly (33) includes a plurality of battery cells (330) arranged along the first direction (X). Each battery cell (330) is provided with a first explosion-proof valve (331) on the side of the third direction (Z) facing the first exhaust channel (202). A plurality of first exhaust holes (241) and a plurality of first explosion-proof valves (331) are arranged opposite to each other along the third direction (Z).

6. The battery pack according to claim 5, characterized in that, The first side beam (21) is provided with a cover (213) on the side facing the battery management system controller (34) along the second direction (Y). The cover (213) is connected to one end of the battery management system controller (34) along the second direction (Y), and the cover (213) and the first side beam (21) together form a second exhaust channel (2101). One end of the cover (213) along the third direction (Z) is connected to the first side beam (21), and the other end is connected to the edge portion of the second base plate (24) along the second direction (Y). The first side beam (21) has a through second exhaust hole (2102) along the second direction (Y), and the second exhaust hole (2102), the second exhaust channel (2101) and the first exhaust channel (202) are connected. The battery pack also includes a second explosion-proof valve (25), which is disposed on the side of the first side beam (21) away from the cover portion (213) along the second direction (Y) and blocks the second vent (2102).

7. The battery pack according to claim 6, characterized in that, The casing (213) includes a first wall (2131), a second wall (2132) and a third wall (2133). The second wall (2132) is connected to the first side beam (21) through the first wall (2131) on one side of the third direction (Z). The first wall (2131), the second wall (2132) and the first side beam (21) together form the second exhaust channel (2101). The third wall (2133) is connected to the second wall (2132) at one end along the second direction (Y), and extends away from the first side beam (21) at the other end; the third wall (2133) is connected to the second base plate (24) on one side along the third direction (Z); The battery management system is connected to the control unit (34) and the second wall (2132).

8. The battery pack according to claim 7, characterized in that, The battery management system slave controller (34) includes a housing (340) and a plurality of third locking parts (342). The plurality of third locking parts (342) are disposed on the side of the housing (340) along the second direction (Y) near the first side beam (21) and are spaced apart from each other. The first wall body (2131) is provided with a plurality of fourth locking parts (214). The fourth locking parts (214) and the third locking parts (342) are disposed opposite to each other along the third direction (Z). The third locking parts (342) and the fourth locking parts (214) are detachably connected by a second fastener (42).

9. The battery pack according to claim 8, characterized in that, The third locking part (342) has a second through hole (3421) extending through the third direction (Z); The first wall body (2131) is provided with a second screw hole (2130) extending along the third direction (Z); the second screw hole (2130) forms the fourth locking part (214); The second fastener (42) passes through the second through hole (3421) along the third direction (Z) and is threaded to the second screw hole (2130).

10. The battery pack according to any one of claims 1-9, characterized in that, Along the third direction (Z), the orthographic projection of the battery management system (34) on the first base plate (23) at least partially overlaps with the orthographic projection of the housing (10) on the first base plate (23).

Images