Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, the battery pack has a first direction, a second direction and a third direction which are vertical pairwise, and the battery pack comprises a box body, a shell, a plurality of battery cells and a battery control system, the box body comprises a bottom plate, an edge beam, a first cover body and a first liquid cooling plate; the bottom plate, the edge beams and the first cover body jointly define a containing space. The first liquid cooling plate divides the containing space into a first cavity and a second cavity which are stacked in the third direction, the first cavity is located between the first cover body and the first liquid cooling plate, and the second cavity is located between the bottom plate and the first liquid cooling plate; a third cavity is defined by the shell and the first cover body; the plurality of battery cells are arranged in the first cavity; the battery control system comprises a battery slave controller and a battery master controller which are connected with each other; the battery slave controller is arranged in the first cavity and is electrically connected with the plurality of battery cells; and the battery master controller is arranged in the third cavity. The battery pack provided by the utility model solves the problem that the arrangement space of the battery core layer of the battery pack is limited.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. 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.

[0003] The capacity of a battery pack is limited by the number of battery cells. Besides the cell modules, a battery pack also includes a battery control system, which comprises a Battery Distribution Unit (BDU) and a Battery Management System (BMS). The battery control system is typically located at the front of the battery pack, sharing the same space as the battery cells. Because the vehicle's installation space usually restricts the lateral dimensions of the battery pack, the area for placing the cells is also limited, thus limiting the number of cells that can be accommodated and consequently restricting the battery pack's capacity. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and an electrical device to solve the problem of limited space for setting up the battery cell layer inside the battery pack.

[0005] In a first aspect, the present invention provides a battery pack having a first direction, a second direction and a third direction that are perpendicular to each other, including: a box body, a shell, multiple battery cells and a battery control system;

[0006] The enclosure includes a bottom plate, side beams, a first cover, and a first liquid cooling plate. The bottom plate and the first cover are respectively disposed on opposite sides of the side beams along a third direction, and the bottom plate, side beams, and the first cover together enclose a receiving space. The first liquid cooling plate is connected to the side beams and disposed between the first cover and the bottom plate. The first liquid cooling plate divides the receiving space into a first cavity and a second cavity stacked along a third direction. The first cavity is located between the first cover and the first liquid cooling plate, and the second cavity is located between the bottom plate and the first liquid cooling plate. The second cavity is connected to the first cavity.

[0007] The shell is located on the side of the first cover away from the bottom plate along a third direction, and the shell and the first cover form a third cavity;

[0008] Multiple battery cells are disposed in the first cavity, and the multiple battery cells are bonded to one side of the first liquid cooling plate along a third direction;

[0009] The battery control system includes interconnected battery slave controllers and battery master controllers; the battery slave controller is located in the first cavity and is electrically connected to multiple battery cells; the battery master controller is located in the third cavity.

[0010] Beneficial effects: The battery pack provided by this utility model forms a first cavity, a second cavity, and a third cavity by dividing the casing into three layers along the Z-direction of the third cavity. The first cavity is suitable for accommodating the battery cells and battery controller, the second cavity can serve as an exhaust channel, and the third cavity is located on the side of the first cavity away from the second cavity and is used to accommodate the battery controller. The second cavity is connected to the first cavity and collects the emissions from the battery cells. This not only directly guides the high-temperature gas away from the battery controller, reducing the heat radiation and damage to key electrical components, but also makes more efficient use of the battery cell installation space in the first cavity, thereby leaving more installation space for the battery cells, optimizing the overall layout and structure of the battery pack, and thus solving the problem of limited space for battery cell layer installation in the battery pack.

[0011] In one alternative embodiment, the side beam includes a first beam located on one side of the side beam along a second direction, the first beam extending along a first direction, and the battery being fixedly connected to the side of the first beam facing the battery cell.

[0012] Beneficial effects: By fixing the battery slave controller to the first beam, it is beneficial to enhance the structural rigidity of the battery slave controller and reduce the impact of vibration and shock on the battery slave controller. On the other hand, when the battery slave controller needs to be maintained or replaced, it can be easily disassembled from the first beam without disassembling the entire battery pack, thus improving maintenance efficiency. Furthermore, it can reduce the lateral space occupied by the battery slave controller in the battery pack, thereby leaving more installation space for the battery cells.

[0013] In one alternative embodiment, the battery pack further includes a busbar, which is built into the first cavity and extends along a first direction;

[0014] The battery has a support portion on one side facing the first beam along the second direction, and the support portion is adapted to fix and support the busbar.

[0015] Beneficial effects: The support part further fixes and supports the busbar, improving the reliability of the busbar connection and preventing loosening of the connection due to busbar shaking, thereby improving the reliability of the busbar electrical connection.

[0016] In one alternative embodiment, the housing and the first beam are disposed opposite each other in a third direction.

[0017] Beneficial effects: By setting the housing and the first beam opposite each other along the third direction Z, on the one hand, the first beam supports the housing in the third direction, enhancing the rigidity and stability of the overall battery pack structure; on the other hand, it can reduce the space occupied by the housing in the lateral space of the battery pack, thus leaving more installation space for the battery cells; furthermore, when it is necessary to maintain or replace the battery control system, the housing can be easily removed from the first beam without disassembling the entire battery pack, which helps to improve maintenance efficiency.

[0018] In one alternative embodiment, a second liquid cooling plate is further included, the second liquid cooling plate having a second cooling channel, the second liquid cooling plate being disposed within a third cavity and located on the side of the first cover facing the housing.

[0019] Beneficial effects: By setting a second liquid cooling plate with a second cooling channel, the heat generated by the battery control system can be carried away in time, enhancing the cooling effect on the battery control system and realizing independent liquid cooling of the battery pack's battery control system. This, in turn, enables separate cooling of the battery cells and the battery control system, ensuring the normal operation of the battery pack.

[0020] In one alternative embodiment, the first cover has a third cooling channel.

[0021] Beneficial effects: It can cool the main battery controller in the third chamber, as well as the slave battery controller and cells in the first chamber, which helps to improve the cooling efficiency of the battery pack.

[0022] In one alternative embodiment, the first beam has a fourth cavity that communicates with the second cavity;

[0023] The first beam has an explosion-proof opening on the side opposite to the first cavity, and the explosion-proof opening is connected to the fourth cavity; the box also includes a second explosion-proof valve, which is installed at the explosion-proof opening.

[0024] Beneficial effects: The fourth cavity of the first beam is connected to the second cavity, thereby introducing high-temperature thermal runaway gas from the second cavity into the fourth cavity. The thermal runaway gas is cooled by the side beam before being discharged, which helps to improve the safety of the battery pack. The fourth cavity is connected to the explosion-proof port, and the second explosion-proof valve is installed at the explosion-proof port. When the cell experiences thermal runaway, the first explosion-proof valve opens, and the thermal runaway gas is discharged into the second cavity through the exhaust port, then into the fourth cavity, and finally into the explosion-proof port. At this time, the second explosion-proof valve opens, and the thermal runaway gas is discharged to the outside of the battery pack, avoiding thermal radiation and damage to the battery control system caused by the thermal runaway gas.

[0025] In one alternative embodiment, the enclosure further includes a cover disposed on the side of the first beam away from the first cavity and covering the second explosion-proof valve; the side of the cover away from the housing has an opening.

[0026] Beneficial effects: It prevents the second explosion-proof valve from opening abnormally or being damaged due to external interference, which helps to improve the safety and reliability of the battery pack; the side of the cover away from the shell has an opening so that when the second explosion-proof valve sprays thermal runaway gas, it can spray towards the ground in a third direction through the opening, avoiding the direct upward spraying of high-temperature gas and harmful substances, reducing harm to the occupants of the vehicle, and at the same time avoiding damage to the battery control system, preventing secondary accidents.

[0027] In one alternative embodiment, the housing includes a housing body and a second cover; the housing body has two opposite sides along a third direction, one side of which is connected to the first cover and the other side has an access port that communicates with a third cavity; the second cover is connected to the housing body by bolts and / or screws, and the second cover is adapted to cover the access port.

[0028] Beneficial effects: The third side of the shell body is connected to the first cover, and an inspection port is formed on the other side to facilitate the maintenance of the battery main control and battery distribution unit in the third cavity through the inspection port. After the maintenance is completed, the inspection port is sealed by the second cover, thereby preventing foreign objects from entering the third cavity and damaging the battery main control and battery distribution unit.

[0029] Secondly, this utility model also provides an electrical device, including the battery pack described above.

[0030] Beneficial effects: By adopting the battery pack of the first aspect, the electrical equipment of the second aspect can not only achieve bottom venting and direct the high-temperature gas directly away from the main control of the battery, reducing the heat radiation and damage to key electrical components, but also make more efficient use of the cell installation space in the first cavity, 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 the cell layer in the battery pack. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a top view of a battery pack according to an embodiment of the present utility model;

[0033] Figure 2 for Figure 1 Sectional view of section BB;

[0034] Figure 3 for Figure 2 Enlarged view of part of C;

[0035] Figure 4 for Figure 2 Enlarged view of part of D;

[0036] Figure 5 for Figure 4 A sectional view of the first plate in the middle;

[0037] Figure 6 An exploded view of the first type of housing of a battery pack according to an embodiment of the present utility model;

[0038] Figure 7 This is a perspective view of the side beam of a battery pack according to an embodiment of the present utility model;

[0039] Figure 8 This is an exploded view of a second type of housing for a battery pack according to an embodiment of the present utility model;

[0040] Figure 9 for Figure 2 Enlarged view of part of E in the middle;

[0041] Figure 10 This is a schematic diagram of the assembly of the battery slave controller and busbar of a battery pack according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10. Enclosure; 101. First cavity; 102. Second cavity; 11. Bottom plate; 12. Side beam; 1201. Fourth cavity; 1202. Explosion-proof opening; 121. First beam; 122. Second beam; 123. Third beam; 13. First cover; 1301. Third cooling channel; 14. First liquid cooling plate; 1401. Exhaust port; 1402. First cooling channel; 141. First plate; 1411. Channel groove; 1412. Connecting platform; 142. Second plate; 15. Structural adhesive layer; 16. Second explosion-proof valve; 17. Cover; 171. Opening;

[0044] 21. Battery cell; 211. First explosion-proof valve; 30. Housing; 301. Third chamber; 31. Housing body; 3101. Inspection port; 32. Second cover;

[0045] 33. Second liquid cooling plate; 3301. Second cooling channel;

[0046] 40. Battery control system; 41. Battery slave controller; 411. Support unit; 42. Battery master controller; 43. Battery distribution unit;

[0047] 50. Busbar;

[0048] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0049] 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.

[0050] The following is combined with Figures 1 to 10 The following describes embodiments of the present invention.

[0051] 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 that are perpendicular to each other, including: a housing 10, a shell 30, a plurality of battery cells 21 and a battery control system 40;

[0052] The housing 10 includes a bottom plate 11, side beams 12, a first cover 13, and a first liquid cooling plate 14;

[0053] The base plate 11 and the first cover 13 are respectively disposed on opposite sides of the side beam 12 along the third direction Z, and the base plate 11, the side beam 12 and the first cover 13 together enclose and form an accommodating space;

[0054] The first liquid cooling plate 14 is connected to the side beam 12 and is disposed between the first cover 13 and the bottom plate 11. The first liquid cooling plate 14 divides the accommodating space into a first cavity 101 and a second cavity 102 stacked along the third direction Z. The first cavity 101 is located between the first cover 13 and the first liquid cooling plate 14, and the second cavity 102 is located between the bottom plate 11 and the first liquid cooling plate 14. The first cavity 101 and the second cavity 102 are connected.

[0055] The housing 30 is disposed on the side of the first cover 13 away from the bottom plate 11 along the third direction Z, and the housing 30 and the first cover 13 surround each other to form a third cavity 301;

[0056] Multiple battery cells 21 are disposed in the first cavity 101, and the multiple battery cells 21 are bonded to the first liquid cooling plate 14 along the third direction Z side;

[0057] The battery control system 40 includes a battery slave controller 41 and a battery master controller 42 that are interconnected; the battery slave controller 41 is located in the first cavity 101 and is electrically connected to multiple battery cells 21; the battery master controller 42 is located in the third cavity 301.

[0058] The battery pack provided by this utility model forms a first cavity 101, a second cavity 102, and a third cavity 301 by dividing the housing 10 into three layers along the Z-direction. The first cavity 101 is suitable for accommodating the battery cell 21 and the battery slave controller 41. The second cavity 102 can serve as an exhaust channel. The third cavity 301 is located on the side of the first cavity 101 away from the second cavity 102 and is used to accommodate the battery master controller 42. This not only enables bottom exhaust, directly guiding high-temperature gas to the housing 10 away from the battery master controller 42, reducing heat radiation and damage to key electrical components, but also allows for more efficient use of the battery cell installation space in the first cavity 101, thereby leaving more installation space for the battery cell 21. This optimizes the overall layout and structure of the battery pack and solves the problem of limited space for battery cell layer installation within the battery pack.

[0059] Furthermore, the battery control system 40 also includes a battery distribution unit 43, which and the battery main controller 42 are located in the third cavity 301, thereby providing more installation space for the battery cell 21 and optimizing the overall layout and structure of the battery pack.

[0060] Furthermore, please combine them together. Figure 2 and Figure 4 As shown, the first liquid cooling plate 14 is provided with a plurality of exhaust ports 1401 that penetrate the first liquid cooling plate 14 in a third direction Z, and the exhaust ports 1401 connect the first cavity 101 and the second cavity 102.

[0061] Each battery cell 21 is provided with a first explosion-proof valve 211 on the side facing the first liquid cooling plate 14. The first explosion-proof valves 211 of multiple battery cells 21 are respectively arranged opposite to multiple exhaust ports 1401 along the third direction Z.

[0062] When thermal runaway occurs in cell 21, the first explosion-proof valve 211 opens, and the thermal runaway gas is discharged into the second chamber 102 through the exhaust port 1401, which avoids thermal radiation and damage to the battery control system 40 caused by the thermal runaway gas. At the same time, for electric vehicles, since the second chamber 102 is close to the bottom of the vehicle and far away from the passenger compartment, the impact of gas leakage on the driver is reduced, and the overall safety is improved.

[0063] In some embodiments, see Figure 7 As shown, the side beam 12 includes a first beam 121, which is located on one side of the side beam 12 along the second direction Y. Please refer to the diagram for details. Figure 3 As shown, the first beam 121 extends along the first direction X, and the battery control 41 is fixedly connected to the side of the first beam 121 facing the cell 21.

[0064] In this embodiment, by fixing the battery slave controller 41 to the first beam 121, it is beneficial to enhance the structural rigidity of the battery slave controller 41 and reduce the impact of vibration and shock on the battery slave controller 41. On the other hand, when the battery slave controller 41 needs to be maintained or replaced, it can be easily disassembled from the first beam 121 without disassembling the entire battery pack, thus improving maintenance efficiency. Furthermore, it can reduce the lateral space occupied by the battery slave controller 41 in the battery pack, thereby leaving more installation space for the battery cell 21.

[0065] Furthermore, the battery control 41 can be connected to the ribs of the first beam 121 by bolts and / or screws.

[0066] Further, please see Figure 7 As shown, the side beam 12 also includes a second beam 122 and a third beam 123. The second beam 122 is arranged opposite to the first beam 121 along the second direction Y, and the third beam 123 is arranged on both sides of the side beam 12 in the first direction X.

[0067] In some embodiments, see Figure 10 As shown, the battery pack also includes a busbar 50, which is built into the receiving space. The busbar 50 is electrically connected to a plurality of battery cells 21 and extends along a first direction X.

[0068] The battery has a support part 411 on one side of the control 41 along the second direction Y toward the first beam 121. The support part 411 is adapted to fix and support the busbar 50.

[0069] It should be noted that the busbar 50 is often designed to be relatively long because it needs to transmit the total power of the battery pack and the output and input points are far apart. Since the conductive material is mostly metal, which has a high density and a large total weight, it will generate amplitude when the battery pack is under vibration during vehicle operation. Since the two ends of the busbar 50 are electrical connection points, the vibration of the busbar 50 can easily lead to connection failure.

[0070] In this embodiment, since the battery slave control 41 is fixedly connected to the side of the first beam 121 facing the cell 21, a support part 411 is provided on the side of the battery slave control 41 facing the first beam 121 along the second direction Y. The support part 411 further fixes and supports the busbar 50, improves the reliability of the busbar 50 connection, avoids loosening of the connection position due to the shaking of the busbar 50, and thus improves the reliability of the electrical connection of the busbar 50.

[0071] In some embodiments, see Figure 3 As shown, the housing 30 and the first beam 121 are positioned opposite each other along the third direction Z.

[0072] In this embodiment, the housing 30 and the first beam 121 are arranged opposite each other along the third direction Z. On the one hand, the first beam 121 supports the housing 30 in the third direction Z, enhancing the rigidity and stability of the overall battery pack structure. On the other hand, it can reduce the lateral space occupied by the housing 30 in the battery pack, thereby leaving more installation space for the battery cell 21. Furthermore, when it is necessary to maintain or replace the battery control system 40, the housing 30 can be easily removed from the first beam 121 without disassembling the entire battery pack, which helps to improve maintenance efficiency.

[0073] In some embodiments, see Figure 3 As shown, the first liquid cooling plate 14 has a first cooling channel 1402;

[0074] Please combine them together Figure 8 As shown, the battery pack also has a second liquid cooling plate 33, which has a second cooling channel 3301. The second liquid cooling plate 33 is disposed in the third cavity 301 and is located on the side of the first cover 13 facing the housing 30.

[0075] In this embodiment, the first liquid cooling plate 14 has a first cooling channel 1402, which removes the heat generated by the battery cell 21 during operation in a timely manner, facilitating temperature control of the battery cell 21; the housing 30 is provided with a second liquid cooling plate 33, which has a second cooling channel 3301, which removes the heat generated by the battery control system 40 in a timely manner, enhancing the cooling effect on the battery control system 40, realizing independent liquid cooling of the battery control system 40 of the battery pack, and thus achieving separate cooling of the battery cell 21 and the battery control system 40, ensuring the normal operation of the battery pack.

[0076] Further, please see Figure 5 As shown, the first liquid cooling plate 14 includes a first plate body 141 and a second plate body 142. The first plate body 141 is recessed along the third direction Z towards the side facing the battery cell 21 to form a flow channel groove 1411. Please refer to the diagram for details. Figure 4 As shown, the second plate 142 is disposed on the side of the first plate 141 along the third direction Z, closer to the battery cell 21. The second plate 142 is adapted to cover the flow channel groove 1411 and is adapted to form a first cooling flow channel 1402 together with the first plate 141. The first liquid cooling plate 14 is bonded to the battery cell 21 and supports the battery cell 21. The first liquid cooling plate 14 includes the first plate 141 and the second plate 142. The second plate 142 and the first plate 141 together form the first cooling flow channel 1402. The first cooling flow channel 1402 is adapted to circulate a cooling medium, thereby removing the heat generated by the battery cell 21 during operation in a timely manner, which facilitates the temperature control of the battery cell 21.

[0077] Further, please see Figure 4As shown, the first plate 141 includes several connecting platforms 1412, which are disposed between each pair of adjacent flow channel grooves 1411. The connecting platforms 1412 are adapted to be sealed to the second plate 142. The connecting platforms 1412 and the second plate 142 are formed by opening an exhaust port 1401 along the third direction Z. By sealing the connecting platforms 1412 with the second plate 142, leakage and cross-flow of the cooling medium in the first cooling flow channel 1402 are avoided. The connecting platforms 1412 and the second plate 142 are formed by opening an exhaust port 1401 along the third direction Z. The exhaust port 1401 is disposed opposite to the first explosion-proof valve 211 of the battery cell 21 along the third direction Z, and the exhaust port 1401 is connected to the second cavity 102. This not only enables bottom exhaust of the battery pack and optimizes the telecommunications layer setting space of the battery pack, but also enables simultaneous cooling of the battery cell 21, improving the safety of the battery pack.

[0078] Further, please see Figure 4 As shown, a structural adhesive layer 15 is provided on the side of the second plate 142 away from the first plate 141 along the third direction Z. The structural adhesive layer 15 is made of a thermally conductive material and is suitable for bonding the second plate 142 to the battery cell 21. Bonding the second plate 142 to the battery cell 21 through the structural adhesive layer 15 not only enhances the overall battery pack mode but also improves the heat transfer efficiency between the battery cell 21 and the second plate 142, thereby enhancing the cooling effect of the first liquid cooling plate 14 on the battery cell 21.

[0079] In some embodiments, see Figure 9 As shown, the first cover 13 has a third cooling channel 1301.

[0080] In this embodiment, the first cavity 101 is located between the first cover 13 and the first liquid cooling plate 14. The housing 30 is disposed on the side of the first cover 13 away from the bottom plate 11 along the third direction Z. The housing 30 has a third cavity 301. The battery slave controller 41 is disposed in the first cavity 101 and is electrically connected to multiple battery cells 21. The battery master controller 42 is disposed in the third cavity 301. By providing a third cooling channel 1301, the first cover 13 can cool both the battery master controller 42 in the third cavity 301 and the battery slave controller 41 and battery cells 21 in the first cavity 101, which is beneficial to improving the cooling efficiency of the battery pack.

[0081] In some embodiments, see Figure 3 As shown, the first beam 121 has a fourth cavity 1201, which is connected to the second cavity 102; an explosion-proof port 1202 is provided on the side of the first beam 121 away from the first cavity 101, which is connected to the fourth cavity 1201; the box body 10 also includes a second explosion-proof valve 16, which is installed in the explosion-proof port 1202.

[0082] In this embodiment, the fourth cavity 1201 of the first beam 121 is connected to the second cavity 102, thereby introducing high-temperature thermal runaway gas from the second cavity 102 into the fourth cavity 1201. The thermal runaway gas is cooled by the side beam 12 before being discharged, which helps to improve the safety of the battery pack. The fourth cavity 1201 is connected to the explosion-proof port 1202, and the second explosion-proof valve 16 is installed in the explosion-proof port 1202. When the cell 21 experiences thermal runaway, the first explosion-proof valve 211 opens, and the thermal runaway gas is discharged into the second cavity 102 through the exhaust port 1401, then into the fourth cavity 1201, and then into the explosion-proof port 1202. At this time, the second explosion-proof valve 16 opens, and the thermal runaway gas is discharged to the outside of the battery pack, avoiding thermal radiation and damage to the battery control system 40 caused by the thermal runaway gas.

[0083] In some embodiments, see Figure 3 As shown, the housing 10 also includes a cover 17, which is disposed on the side of the first beam 121 away from the first cavity 101 and covers the second explosion-proof valve 16; the side of the cover 17 away from the housing 30 has an opening 171.

[0084] In this embodiment, the second explosion-proof valve 16 is protected by the cover 17, which prevents the second explosion-proof valve 16 from opening abnormally or being damaged due to external interference, thereby improving the safety and reliability of the battery pack. The cover 17 has an opening 171 on the side away from the housing 30, so that when the second explosion-proof valve 16 sprays thermal runaway gas, it can spray towards the ground in the third direction Z through the opening 171, avoiding the direct upward spraying of high-temperature gas and harmful substances, reducing harm to the occupants of the vehicle, and at the same time avoiding damage to the battery control system 40, thus preventing secondary accidents.

[0085] In some embodiments, see Figure 6 As shown, the housing 30 includes a housing body 31 and a second cover 32; the housing body 31 has two opposite sides along the third direction Z, one side of which is connected to the first cover 13, and the other side has an inspection port 3101, which is connected to the third cavity 301; the second cover 32 is connected to the housing body 31 by bolts and / or screws, and the second cover 32 is adapted to cover the inspection port 3101.

[0086] In this embodiment, the third-direction Z side of the shell body 31 is connected to the first cover 13, and an inspection port 3101 is formed on the other side to facilitate maintenance of the battery main control 42 and battery distribution unit 43 in the third cavity 301 through the inspection port 3101. After maintenance is completed, the inspection port 3101 is sealed by the second cover 32 to prevent foreign objects from entering the third cavity 301 and causing damage to the battery main control 42 and battery distribution unit 43.

[0087] According to an embodiment of the present invention, another aspect provides an electrical device including the battery pack described above.

[0088] The electrical equipment in this embodiment, by adopting the aforementioned battery pack, can not only achieve bottom venting, directly guiding high-temperature gas to the housing 10 away from the battery main control 42, reducing heat radiation and damage to key electrical components, but also make more efficient use of the cell installation space in the first cavity 101, thereby leaving more installation space for the cell 21, optimizing the overall layout and structure of the battery pack, and thus solving the problem of limited space for the cell layer inside the battery pack.

[0089] 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 a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other, characterized in that, include: The enclosure (10), the shell (30), multiple battery cells (21) and the battery control system (40); The enclosure (10) includes a bottom plate (11), side beams (12), a first cover (13), and a first liquid cooling plate (14); the bottom plate (11) and the first cover (13) are respectively disposed on opposite sides of the side beams (12) along the third direction (Z), and the bottom plate (11), the side beams (12), and the first cover (13) together enclose a receiving space; the first liquid cooling plate (14) is connected to the side beams (12) and disposed on the first cover (13). 3) Between the base plate (11) and the first liquid cooling plate (14), the first liquid cooling plate (14) divides the accommodating space into a first cavity (101) and a second cavity (102) stacked along the third direction (Z), wherein the first cavity (101) is located between the first cover (13) and the first liquid cooling plate (14), the second cavity (102) is located between the base plate (11) and the first liquid cooling plate (14), and the second cavity (102) communicates with the first cavity (101); The housing (30) is disposed on the side of the first cover (13) away from the bottom plate (11) along the third direction (Z), and the housing (30) and the first cover (13) form a third cavity (301); Multiple battery cells (21) are disposed in the first cavity (101), and the multiple battery cells (21) are bonded to the first liquid cooling plate (14) along the third direction (Z). The battery control system (40) includes a battery slave controller (41) and a battery master controller (42) connected to each other; the battery slave controller (41) is located in the first cavity (101) and is electrically connected to a plurality of battery cells (21); the battery master controller (42) is located in the third cavity (301).

2. The battery pack according to claim 1, characterized in that, The side beam (12) includes a first beam (121) located on one side of the side beam (12) along the second direction (Y), the first beam (121) extending along the first direction (X), and the battery control (41) fixedly connected to the side of the first beam (121) facing the battery cell (21).

3. The battery pack according to claim 2, characterized in that, The battery pack also includes a busbar (50) which is built into the first cavity (101) and extends along the first direction (X); The battery has a support portion (411) on one side of the control (41) along the second direction (Y) toward the first beam (121), and the support portion (411) is adapted to fix and support the busbar (50).

4. The battery pack according to claim 2, characterized in that, The housing (30) and the first beam (121) are arranged opposite each other along the third direction (Z).

5. The battery pack according to claim 4, characterized in that, It also includes a second liquid cooling plate (33), which has a second cooling channel (3301) and is disposed in the third cavity (301) and located on the side of the first cover (13) facing the housing (30).

6. The battery pack according to claim 4, characterized in that, The first cover (13) has a third cooling channel (1301).

7. The battery pack according to claim 5, characterized in that, The first beam (121) has a fourth cavity (1201), which is connected to the second cavity (102); The first beam (121) has an explosion-proof port (1202) on the side away from the first cavity (101), and the explosion-proof port (1202) is connected to the fourth cavity (1201); the box body (10) also includes a second explosion-proof valve (16), which is installed in the explosion-proof port (1202).

8. The battery pack according to claim 7, characterized in that, The housing (10) also includes a cover (17), which is disposed on the side of the first beam (121) away from the first cavity (101) and covers the second explosion-proof valve (16); the cover (17) has an opening (171) on the side away from the housing (30).

9. The battery pack according to any one of claims 1-8, characterized in that, The housing (30) includes a housing body (31) and a second cover (32); the housing body (31) has two sides opposite each other along the third direction (Z), one side of which is connected to the first cover (13), and the other side has an inspection port (3101), which communicates with the third cavity (301); the second cover (32) is connected to the housing body (31) by bolts and / or screws, and the second cover (32) is adapted to cover the inspection port (3101).

10. An electrical appliance, characterized in that, Includes a battery pack as described in any one of claims 1-9 above.

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