Battery pack housing assembly, battery pack, and electric device

Abstract

The present disclosure relates to a battery pack shell assembly, a battery pack and an electric device, the shell assembly can comprise a shell, a beam body and a reinforcing structure; wherein the beam body can be arranged in the shell to divide the shell into multiple compartments, the beam body can comprise at least one connecting part, the connecting part is connected with the shell through a connecting piece, the connecting piece penetrates the shell and the connecting part; the reinforcing structure can be arranged on a first side of the at least one connecting part away from the shell, the reinforcing structure is connected with the beam body and the penetrating part of the connecting piece on the first side. The shell of the present disclosure is provided with a reinforcing structure, which increases the connection area and / or contact area between the connecting piece and the beam body, ensures the stability of the connection between the beam body and the shell, so that when the shell assembly is impacted by external force, the sealing failure between the inside of the shell assembly and the outside and / or between the multiple compartments of the shell assembly can be reduced or even avoided, thereby improving the sealing and safety of the battery pack.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack technology, specifically to a battery pack housing assembly, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, when a battery pack is subjected to an external impact, the seal between the inside of the battery pack's housing assembly and the outside, and / or between the various compartments inside the housing assembly, may fail, thereby reducing the safety of the battery pack. Utility Model Content

[0003] The purpose of this disclosure is to provide a housing assembly for a battery pack, a battery pack, and an electrical device, wherein the housing assembly for the battery pack solves at least partially the above-mentioned technical problems by providing a reinforcing structure on the beam of the housing.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a battery pack housing assembly, comprising: a housing; a beam disposed within the housing to divide the housing into multiple compartments, the beam including at least one connecting portion connected to the housing via a connector, the connector penetrating the housing and the connecting portion; and a reinforcing structure disposed on a first side opposite to the at least one connecting portion, the reinforcing structure being connected to the beam and to a through portion of the connector located on the first side. The reinforcing structure increases the connection area and / or contact area between the connector and the beam, thereby improving the stability of the connection between the beam 200 and the housing 100, ensuring the sealing and safety of the battery pack.

[0005] In some possible implementations, the beam has a first end and a second end opposite each other along a first direction, at least one of the first end and the second end being provided with the connecting portion, and the reinforcing structure being located between the first end and the second end. This arrangement can make full use of the space at both ends of the beam and reduce the impact of the reinforcing structure on other structures in the shell.

[0006] In some possible implementations, the beam has at least one chamber located between the first end and the second end, and the reinforcing structure is disposed within at least one of the chambers. The arrangement of the chambers allows at least a portion of the interior of the beam to be hollow, thereby reducing the weight of the beam and facilitating the transfer and absorption of the expansion forces of the battery cells.

[0007] In some possible implementations, there are multiple chambers, with the wall of at least one of the chambers located at the first end and the chambers located at the second end forming the connecting portion. The multiple-chamber configuration can improve the structural strength of the beam to a certain extent while ensuring a lightweight beam design.

[0008] In some possible implementations, both the first end and the second end are provided with the connecting portion, the number of chambers is one, and the reinforcing structure is disposed within the chamber and connected to the through portion of the connector on at least one of the connecting portions. This allows for a lightweight beam design while maximizing the connection strength between the beam and the shell to ensure a tight seal between them.

[0009] In some possible implementations, the reinforcing structure fills at least a portion of the cavity in which it resides to cover at least a portion of the through portion. The reinforcing structure being disposed in a filling manner within the cavity simplifies the internal structure of the beam and facilitates beam forming.

[0010] In some possible implementations, the reinforcing structure includes a first colloidal structure. The cured adhesive forms this first colloidal structure, improving the bonding efficiency of the reinforcing structure.

[0011] In some possible implementations, the housing includes a bottom plate and a cover plate opposite each other along a first direction. A first end of the beam is adjacent to the bottom plate, and a second end of the beam is adjacent to the cover plate. One of the first and second ends of the beam is provided with the connecting portion, and the connecting member on the connecting portion is connected to the reinforcing structure. The other of the first and second ends of the beam is provided with a structural plate portion, which is bonded to or spaced apart from the corresponding bottom plate or cover plate. Alternatively, both the first and second ends of the beam are provided with the connecting portion, and at least one of the connecting members on each connecting portion is connected to the reinforcing structure. One end of the beam can be connected to the housing via the reinforcing structure and the connecting member, while the other end can be connected to the housing in other ways or spaced apart. Therefore, the reinforcing structure of this disclosure can be applied to battery packs with different requirements, thus improving the applicability of the reinforcing structure.

[0012] In some possible implementations, the beam extends along a second direction and is located between two adjacent compartments along a third direction. The beam includes two opposing side plates along the third direction, and the connecting portion and / or the structural plate portion is connected to the two side plates. One or more cavities are formed between the two side plates, and at least one of the cavities contains the reinforcing structure. That is, the reinforcing structure can be located inside the beam, so that the reinforcing structure does not occupy the space outside the beam and avoids the reinforcing structure affecting the installation of other structures in the shell.

[0013] In some possible implementations, the plurality of chambers are separated by one or more partitions connected between the two side plates. The partitions can provide some support to the beam, thereby increasing the structural strength of the beam.

[0014] In some possible implementations, the reinforcing structure is integrally formed with the beam. The reinforcing structure can be constructed as a solid structure integrally formed with the beam, and the through portion of the connector can be inserted into the solid structure. The solid structure can ensure the connection stability between the shell and the beam by limiting the sway of the connector.

[0015] In some possible implementations, the connecting part and the housing are sealed together by a first seal. This ensures the airtightness between the connecting part and the housing, and also ensures that the compartments on both sides of the beam are sealed apart by the first seal, thereby reducing or even preventing the impact on components in adjacent compartments when a component in one compartment malfunctions.

[0016] In some possible implementations, the housing includes a bottom plate and a cover plate opposite each other along a first direction. First seals are provided between the beam and the bottom plate, and between the beam and the cover plate, to isolate the plurality of compartments on both sides of the beam. The first seals ensure a sealed interval between the compartments, so that if a component in one compartment malfunctions, components in the other compartments can still function normally.

[0017] In some possible implementations, the plurality of compartments includes a plurality of battery compartments separated by the beams; the housing assembly of the battery pack also includes an electrical compartment located on the side of the cover plate opposite to the base plate. The electrical compartment is located outside the housing to allow more space inside the housing for the battery compartments, thereby increasing the number of individual battery cells 500 and improving the power output of the battery pack.

[0018] In some possible implementations, the plurality of compartments includes a battery compartment and an electrical compartment, with adjacent battery compartments and electrical compartments separated by at least a portion of the beams; and / or, two adjacent battery compartments are separated by at least a portion of the beams. The electrical compartment may be located inside the housing and adjacent to at least one battery compartment, such that the electrical compartment does not occupy space outside the housing, which can reduce the volume of the housing assembly and the overall battery pack to some extent.

[0019] A second aspect of this disclosure provides a battery pack including battery cells and a housing assembly of the battery pack, wherein the battery cells are disposed in a compartment configured as a battery compartment.

[0020] In some possible implementations, the beam extends along a second direction to separate two adjacent battery compartments along a third direction, the second direction being perpendicular to the third direction. The beam has two sidewalls facing away from each other along the third direction. Each battery cell includes two first sidewalls facing each other along the third direction and two second sidewalls facing each other along the second direction. The area of ​​the first sidewalls is larger than the area of ​​the second sidewalls, and the first sidewalls are parallel to the sidewalls. That is, the larger surface of the battery cell can be positioned opposite the beam to transmit and absorb the expansion force of the battery cell.

[0021] In some possible implementations, an insulating structure is provided on the sidewall surface of the beam. The insulating structure can provide insulation and protection between the beam and the battery cells.

[0022] In some possible implementations, an electrical module in the electrical compartment of the battery pack is connected to a battery cell in an adjacent battery compartment via an electrical connector. The electrical connector passes through a through-hole in a partition structure between the battery compartment and the electrical compartment. A seal is provided between the electrical connector and the through-hole. The partition structure is at least a portion of the beam between the electrical compartment and the battery compartment, or it may be a portion of the housing between the electrical compartment and the battery compartment. The seal ensures a tight seal between the electrical compartment and the battery compartment while the electrical module and battery cell are connected via the electrical connector, allowing components in other compartments to function normally if a component in one compartment malfunctions.

[0023] In some possible implementations, the seal includes a sleeve portion fitted onto the electrical connector and an annular flange portion disposed on the outer peripheral wall of the sleeve portion. The sleeve portion passes through the through hole, and the annular flange portion is sealingly connected to the partition structure. The sleeve portion and the annular flange portion can increase the contact area between the seal and the partition structure, thereby ensuring the airtightness between the electrical compartment and the battery compartment.

[0024] In some possible implementations, a sealing ring is provided between the annular flange portion and the partition structure, and the annular flange portion has a groove for accommodating the sealing ring; and / or, an annular weldable structural member is connected to the outer periphery of the annular flange portion, and the weldable structural member is connected to the partition structure. The sealing ring further ensures the airtightness between the electrical compartment and the battery compartment, and the weldable structure facilitates the connection between the electrical connector and the partition structure.

[0025] A third aspect of this disclosure provides an electrical device including the aforementioned battery pack.

[0026] Through the above technical solution, the housing of this disclosure is provided with a reinforcing structure. The reinforcing structure can be set on the first side away from the housing at the connection part of the beam, so as to connect the beam and the connecting part through the first side. This increases the connection area and / or contact area between the connecting part and the beam, ensuring the connection stability between the beam and the connecting part, and thus also improving the connection stability between the beam and the housing. In this way, when the housing assembly is subjected to external impact, the sealing failure between the inside of the housing assembly and the outside world and / or between the various compartments inside the housing assembly can be reduced or even avoided, thereby improving the sealing performance and safety of the battery pack.

[0027] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional view of the connection between the beam and the shell provided in an embodiment of this disclosure; Figure 2 This is an axonometric view of the beam provided in an embodiment of this disclosure; Figure 3 This is a first-angle exploded view of the battery pack provided in an embodiment of this disclosure; Figure 4 This is a second exploded view of the battery pack provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the external structure of the battery pack provided in an embodiment of this disclosure; Figure 6 This is a top view of the internal structure of the battery pack provided in an embodiment of this disclosure; Figure 7 This is a cross-sectional view of the internal structure of the battery pack provided in an embodiment of this disclosure; Figure 8 This is a top view of the external structure of the battery pack provided in an embodiment of this disclosure; Figure 9 This is a cross-sectional view of the electrical connector, through hole, seal, sealing ring, and weldable structural component provided in the embodiments of this disclosure.

[0029] Explanation of reference numerals in the attached figures 1-Connecting part; 101-First side; 2-Reinforcing structure; 3-Cavity; 31-First chamber; 32-Second chamber; 4-Structural plate; 5-Side plate; 6-Partition; 7-First seal; 8-Buffer structure; 9-Insulation structure; 10-Electrical connector; 11-Through hole; 12-Seal; 121-Sleeve part; 122-Annular flange part; 1221-Groove; 13-Sealing ring; 14-Weldable structure Components; 100-Shell; 110-Base plate; 120-Cover plate; 200-Beam; 210-First end; 220-Second end; 300-Compartment; 310-Battery compartment; 320-Electrical compartment; 400-Connector; 410-Through section; 500-Battery cell; 510-First side; 520-Second side; 600-Partition structure; A-First direction; B-Second direction; C-Third direction. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself; "first direction" refers to the height direction of the housing; "second direction" can be the lateral or longitudinal direction of the housing; "third direction" can be the lateral or longitudinal direction of the housing, and this direction is perpendicular to the second direction. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In addition, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0032] The housing assembly and battery pack of the exemplary embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0033] refer to Figures 1 to 9 As shown, in a first aspect of this disclosure, a housing assembly for a battery pack is provided. The housing assembly may include a housing 100, a beam 200, and a reinforcing structure 2. The beam 200 may be disposed within the housing 100 to divide the housing 100 into a plurality of compartments 300. The beam 200 may include at least one connecting portion 1, which is connected to the housing 100 via a connector 400, the connector 400 penetrating through the housing 100 and the connecting portion 1. The reinforcing structure 2 may be disposed on a first side 101 away from the housing 100 of the at least one connecting portion 1, and the reinforcing structure 2 is connected to the beam 200 and to the through portion 410 of the connector 400 located on the first side 101.

[0034] The reinforcement structure 2 allows the through portion 410 of the connector 400 to also connect to the beam 200. For example, the reinforcement structure 2 can be disposed on the wall of the beam 200 on the first side 101 of the connecting portion 1 away from the housing 100, so that the through portion 410 of the connector 400 can connect or abut against the wall of the beam 200, excluding the connecting portion 1, through the reinforcement structure 2; or, the reinforcement structure 2 can be disposed on the first side 101 of the connecting portion 1, so that the through portion 410 of the connector 400 can connect to the connecting portion 1 of the beam 200 through the reinforcement structure 2. The first side 101 is connected or abutted; or, the reinforcing structure 2 can be provided on the first side 101 of the connecting part 1 and the wall surface of the beam 200, so that the through part 410 of the connector 400 can be connected through the reinforcing structure 2 and the wall surface of the beam 200 and the first side 101 of the connecting part 1. In this way, the connection area and / or contact area between the connector 400 and the beam 200 can be increased, thereby ensuring the connection stability between the beam 200 and the connector 400, and further improving the connection stability between the beam 200 and the shell 100.

[0035] Taking the battery pack in a vehicle as an example, when the vehicle is scraped or hit by a ball at the bottom, the housing assembly will be subjected to external impact. The reinforcement structure 2 can reduce or even avoid the sealing failure between the inside of the housing assembly and the outside world and / or between the various compartments 300 inside the housing assembly. This ensures that under extreme conditions, such as when all compartments 300 in the battery pack need to be sealed, if a battery cell 500 in one compartment 300 of the housing 100 experiences thermal runaway, the battery cells 500 in other compartments 300 will not be affected, thus ensuring that the battery pack can still supply power to the vehicle normally for a certain period of time. Alternatively, it can also prevent foreign objects such as moisture or dust from entering the battery pack and affecting its normal use. Based on this, the sealing performance and safety of the battery pack are improved.

[0036] It should be noted that when there are multiple connecting parts 1, at least one connecting member 400 on at least one connecting part 1 can achieve the technical effect of this disclosure by connecting the reinforcing structure 2 and the beam 200. Other connecting parts 1 can be connected to the housing 100 by connecting member 400 alone.

[0037] This disclosure does not specifically limit the number of connecting parts 1 or the number of connecting pieces 400 that can be connected to the reinforcing structure 2 through the through part 410.

[0038] Furthermore, the number of beams 200 and their specific positions within the housing 100 can be adaptively adjusted according to the needs of the battery pack. For example, one beam 200 may be provided and located in the middle of the housing 100 to evenly divide the interior of the housing 100 into two compartments 300 in the transverse or longitudinal direction. Alternatively, multiple beams 200 may be provided, and the multiple beams 200 may be spaced apart along the transverse or longitudinal direction of the housing 100 to evenly divide the interior of the housing 100 into multiple compartments 300. This disclosure does not limit the scope of the invention.

[0039] In embodiments of this disclosure, such as Figure 1 As shown, the beam 200 may have a first end 210 and a second end 220 opposite each other along a first direction A. At least one of the first end 210 and the second end 220 is provided with a connecting portion 1, and the reinforcing structure 2 is located between the first end 210 and the second end 220. This arrangement can make full use of the space at both ends of the beam 200, reduce the space occupied by the reinforcing structure 2 in the second direction B or the third direction C, and reduce or even avoid the impact of the reinforcing structure 2 on other structures in the shell 100.

[0040] In addition, such as Figure 1 and Figure 2 As shown, the beam 200 may have at least one chamber 3 located between the first end 210 and the second end 220, and the reinforcing structure 2 is disposed within the at least one chamber 3. The arrangement of the chamber 3 allows at least a portion of the interior of the beam 200 to be hollow, thus ensuring a lightweight design of the beam 200 and reducing the weight of the casing 100 while simultaneously transmitting and absorbing the expansion force of the battery cell 500.

[0041] Among them, such as Figure 1 and Figure 2 As shown, in some possible embodiments, the beam 200 may extend along the second direction B and be located between two adjacent compartments 300 along the third direction C. The beam 200 may include two opposite side plates 5 along the third direction C, with a connecting portion 1 and / or a structural plate portion 4 connected to the two side plates 5, forming one or more cavities 3 between the two side plates 5. At least one cavity 3 is provided with a reinforcing structure 2. That is, the reinforcing structure 2 may be disposed inside the beam 200. In this way, the reinforcing structure 2 can enhance the structural strength of the beam 200 itself while ensuring the stability of the connection between the beam 200 and the shell 100, and the reinforcing structure 2 will not occupy the space outside the beam 200, thus avoiding the situation where the reinforcing structure 2 affects the installation of other structures in the shell 100.

[0042] like Figure 1 and Figure 2As shown, multiple chambers 3 can be separated by one or more partitions 6 connected between two side plates 5. The partitions 6 can be inserted or snapped onto the side plates 5 to reduce the connection structure between the partitions 6 and the side plates 5 and improve the efficiency of disassembly and assembly of the partitions 6; or, the partitions 6 can be integrally formed with the side plates 5.

[0043] The partition 6 can provide some support for the beam 200, thereby improving the structural strength of the beam 200.

[0044] When there are multiple chambers 3, the number of chambers 3 can ensure the structural strength of the beam 200 to a certain extent while meeting the lightweight requirements of the beam 200 and shell 100, reducing or even avoiding damage to the beam 200 after being subjected to external impact. The reinforcing structure 2 can be set in one or more different chambers 3 as needed.

[0045] Furthermore, when there are multiple chambers 3, the wall of at least one of the chambers 3 located at the first end 210 and the chambers 3 located at the second end 220 can form a connecting portion 1.

[0046] For example, such as Figure 1 and Figure 2 As shown, the chamber 3 located at the first end 210 can be a first chamber 31, and the chamber 3 located at the second end 220 can be a second chamber 32. The connecting part 1 can be located in the first chamber 31 and / or the second chamber 32. When the connecting part 1 is located in the first chamber 31, the wall of the first chamber 31 near the first end 210 can form the connecting part 1. When the connecting part 1 is located in the second chamber 32, the wall of the second chamber 32 near the second end 220 can form the connecting part 1. The first chamber 31 and the second chamber 32 can be connected to the shell 100 in different ways as needed. For example, in one possible embodiment, one of the first chamber 31 and the second chamber 32 can be provided with a reinforcing structure 2, which is connected to the through portion 410 of the connector 400 to connect the beam 200 and the shell 100. The other chamber can be connected to the beam 200 and the shell 100 only through the connector 400. Alternatively, the other chamber can be arranged at intervals from the shell 100. This can improve the connection strength between the first end 210 or the second end 220 of the beam 200 and the shell 100, ensuring the sealing of the shell 100 and the beam 200. Alternatively, in another possible embodiment, both the first chamber 31 and the second chamber 32 can be provided with a reinforcing structure 2. This can improve the connection strength between the first end 210 and the second end 220 of the beam 200 and the shell 100, thereby maximizing the connection strength between the beam 200 and the shell 100 to ensure the sealing of the two.

[0047] Of course, other chambers 3 can also be provided between the first chamber 31 and the second chamber 32. The provision of multiple chambers 3 can increase the connection structure within the beam 200, so as to maximize the structural strength of the beam 200.

[0048] When there is only one chamber 3, the weight of the beam 200 and the housing 100 can be reduced to the maximum extent so that the battery pack meets the requirements of lightweight design. The reinforcing structure 2 can be set in the chamber 3 on the side close to the first end 210 and / or the second end 220 as needed, so as to occupy part of the space in the chamber 3 and realize the connection between the connector 400 and the beam 200.

[0049] For example, such as Figure 1 and Figure 2 As shown, both the first end 210 and the second end 220 may be provided with a connecting part 1, the number of chambers 3 is one, and the reinforcing structure 2 is provided in the chamber 3 and connected to the through part 410 of the connector 400 on at least one connecting part 1. The connecting portion 1 on the first end 210 and the connecting portion 1 on the second end 220 can be connected to the housing 100 in different ways as needed. For example, in one possible embodiment, the connecting portion 1 of one of the first end 210 and the second end 220 can be provided with a reinforcing structure 2, while the other can be connected to the beam 200 and the housing 100 only by a connector 400. Alternatively, the other can be arranged in a way that is spaced apart from the housing 100. This can improve the connection strength between the first end 210 or the second end 220 of the beam 200 and the housing 100. Alternatively, in another possible embodiment, the connecting portion 1 of both the first end 210 and the second end 220 can be provided with a reinforcing structure 2. This can improve the connection strength between the first end 210 and the second end 220 of the beam 200 and the housing 100, thereby maximizing the connection strength between the beam 200 and the housing 100 to ensure the sealing between them.

[0050] In some embodiments not shown, the reinforcing structure 2 may also be disposed outside the beam 200. For example, the connecting portion 1 located at the first end 210 and / or the second end 220 of the beam 200 may have a flange structure extending toward the side of the beam 200. The connector 400 may penetrate the housing 100 and the flange structure to connect the housing 100 and the beam 200 together. The reinforcing structure 2 may be located on the side of the flange structure away from the housing 100 or on the outer side wall of the beam 200. The connector 400 and the reinforcing structure 2 are located on the outside of the beam 200, which facilitates their installation.

[0051] In addition, the reinforcing structure 2 can be set both inside and outside the beam 200, thereby further increasing the connection strength between the beam 200 and the shell 100, thus ensuring the sealing between the beam 200 and the shell 100 and the safety of the battery pack.

[0052] In addition, such as Figure 1 and Figure 2 As shown, the reinforcing structure 2 can be disposed on the beam 200 in various ways. For example, the reinforcing structure 2 can fill at least part of the cavity 3 in which it is located to cover at least part of the through portion 410. By filling the cavity 3 with the reinforcing structure 2, compared to disposing of a solid structure within the cavity 3, the structure within the beam 200 can be simplified, facilitating the forming of the beam 200. Furthermore, such a reinforcing structure 2 can fully contact the gaps and rough areas within the beam 200, thereby increasing the connection area between the reinforcing structure 2 and the connecting portion 1 or other walls within the beam 200, ensuring the connection stability after the reinforcing structure 2 is connected to the beam 200.

[0053] For example, when a cavity 3 is provided inside the beam 200, the worker can fill the reinforcing structure 2 into the side of the cavity 3 near the first end 210 and / or the side of the cavity 3 near the second end 220. Thus, the reinforcing structure 2 can fill part of the cavity 3 and connect with the connector 400 in the cavity 3. The remaining space in the cavity 3 can make the beam 200 a hollow structure, so as to reduce the weight of the beam 200 and be able to transmit and absorb the expansion force of the battery cell 500.

[0054] When multiple chambers 3 are provided in the beam 200, for example, a first chamber 31 near the first end 210 and a second chamber 32 near the second end 220 can be included. Workers can fill at least a portion of the first chamber 31 and / or the second chamber 32 with reinforcing structures 2 so that the reinforcing structures 2 can be connected to the connectors 400 in the corresponding chambers 3. This can reduce the weight of the beam 200 while improving the structural strength of the beam 200 to a certain extent.

[0055] The reinforcing structure 2 may include a first colloidal structure. This first colloidal structure can be formed from a cured adhesive. For example, the adhesive can be configured as a potting compound. When the reinforcing structure 2 is installed within the beam 200, the adhesive can be filled into the cavity 3. The amount of adhesive filled can be adjusted adaptively according to requirements, as long as it ensures that the adhesive can cover the through portion 410 of the connector 400, the cavity 3, and / or the connector 1 after curing. Furthermore, using the first colloidal structure as the reinforcing structure 2 can also improve the connection efficiency of the reinforcing structure 2.

[0056] In some possible implementations, the reinforcing structure 2 can be integrally formed into the beam 200. The specific construction of the reinforcing structure 2 can be adaptively adjusted according to the needs of the battery pack. For example, the reinforcing structure 2 can be constructed as a rod or plate on the wall of the beam 200 or on the connecting part 1. The rod-shaped or plate-shaped reinforcing structure 2 can extend toward the through portion 410 of the connector 400 and abut against at least a portion of the through portion 410. Alternatively, at least a portion of the beam 200 can be a solid structure, which can form the aforementioned reinforcing structure 2. The solid reinforcing structure 2 can surround the outer periphery of the through portion 410 and abut against the through portion 410. In this way, when the battery pack is impacted by an external force, the reinforcing structure 2 can suppress the shaking of the connector 400 to a certain extent, thereby ensuring the connection strength between the beam 200 and the shell 100, and thus ensuring the stability and sealing of the connection between the two.

[0057] For example, when a chamber 3 is provided inside the beam 200, a portion of the area near the first end 210 of the beam 200 and a portion of the area near the second end 220 of the beam 200 can be constructed as a solid structure, which can form the reinforcing structure 2 of this disclosure. Another portion can be constructed as a hollow structure. A connection hole can be formed on the solid structure for the insertion of the through portion 410 of the connector 400. In this way, the hollow structure can reduce the weight of the beam 200 and can transmit and absorb the expansion force of the battery cell 500. The connection hole of the solid structure can suppress the shaking of the connector 400 to ensure the sealing between the beam 200 and the housing 100.

[0058] When multiple chambers 3 are provided in the beam 200, for example, a first chamber 31 near the first end 210 and a second chamber 32 near the second end 220 may be included. At least a portion of the first chamber 31 and the second chamber 32 may be configured as solid structures, and the solid structures may include connecting holes for the insertion of the through portion 410 of the connector 400. Thus, the solid structures can suppress the shaking of the connector 400 to ensure the sealing between the beam 200 and the housing 100.

[0059] In some possible implementations, the connecting portion 1 and the housing 100 can be sealed together by a first sealing element 7. The connecting portion 1 can be provided at the first end 210 and / or the second end 220 of the beam 200 to ensure the sealing between the beam 200 and the housing 100. When the connecting portion 1 is located at the first end 210 or the second end 220, it can improve the impact of components in the compartment 300 on one side of the beam 200 on components in the adjacent compartment 300 to a certain extent. When the connecting portion 1 is located at the first end 210 and the second end 220, it can ensure a sealed interval between two adjacent compartments 300. Thus, it reduces or even avoids the impact on components in the adjacent compartments 300 when a component in one compartment 300 has a problem.

[0060] In embodiments of this disclosure, such as Figures 1 to 5 As shown, the housing 100 may include a bottom plate 110 and a cover plate 120 opposite each other along a first direction A. The first end 210 of the beam 200 is adjacent to the bottom plate 110, and the second end 220 of the beam 200 is adjacent to the cover plate 120. That is, the first end 210 of the beam 200 can be located near the bottom of the housing 100, and the second end 220 of the beam 200 can be located near the top of the housing 100. One of the first end 210 and the second end 220 of the beam 200 is provided with a connecting portion 1, and a connecting member 400 on the connecting portion 1 is connected to a reinforcing structure 2. The other of the first end 210 and the second end 220 of the beam 200 is provided with a structural plate portion 4, which is bonded to or spaced apart from the corresponding bottom plate 110 or cover plate 120. Taking a battery pack in a vehicle as an example, the housing of the battery pack... The components are generally located at the bottom of the vehicle. During vehicle operation, the vehicle is prone to scraping the bottom or being hit by a ball. Under such conditions, the bottom of the housing 100 will be subjected to greater impact than the top. Therefore, for example, the first end 210 of the beam 200 can be provided with a connecting part 1, and the reinforcing structure 2 and the connecting part 410 of the connecting member 400 through the bottom plate 110 are connected to the connecting part 1 to increase the connection strength between the beam 200 and the bottom plate 110. The second end 220 of the beam 200 can be bonded to the cover plate 120 with an adhesive such as potting compound. Alternatively, there can be a certain gap between the second end 220 of the beam 200 and the cover plate 120. The operator can make adaptive adjustments to the connection method between the second end 220 of the beam 200 and the cover plate 120 according to the needs of the battery pack.

[0061] As can be seen, one end of the beam 200 can be connected to the connector 400 through the reinforcing structure 2, and the other end can be connected to the shell 100 in other ways or set at intervals. It can be seen that the reinforcing structure 2 of this disclosure can be applied to different types of battery packs, thus improving the applicability of the reinforcing structure 2.

[0062] Or, such as Figure 1 and Figure 2 As shown, in order to maximize the connection strength between the beam 200 and the housing 100, both the first end 210 and the second end 220 of the beam 200 can be provided with a connecting portion 1, and at least one of the connecting members 400 on each connecting portion 1 is connected with a reinforcing structure 2. That is, one of the connecting members 400 on the first end 210 and the second end 220 of the beam 200 can be provided with a reinforcing structure 2, while the other can connect the housing 100 and the beam 200 together solely through the connecting member 400. The first end 210 and the second end 220 of the beam 200 are both connected to the housing 100 through the connecting member 400, which can ensure the stability of the connection between the beam 200 and the housing 100; or, both the connecting members 400 on the first end 210 and the second end 220 of the beam 200 can be provided with a reinforcing structure 2, which can maximize the connection strength between the housing 100 and the beam 200, so as to ensure the sealing and safety of the battery pack when subjected to external forces.

[0063] In addition, to ensure the airtightness between the compartments 300 within the shell 100, such as Figure 3 As shown, a first sealing element 7 is provided between the beam 200 and the base plate 110, and between the beam 200 and the cover plate 120, to isolate multiple compartments 300 on both sides of the beam 200. In this way, the sealing performance between adjacent compartments 300 can be improved as much as possible. If a battery cell 500 in one compartment 300 experiences extreme conditions, such as thermal runaway or water ingress into the compartment 300, the well-sealed compartment 300 can prevent the battery cells 500 in other compartments 300 from being affected. This allows the battery cells 500 in other compartments 300 to still supply power to the electrical equipment with the battery pack, ensuring the normal operation of the electrical equipment for at least a period of time.

[0064] Of course, a first sealing element 7 can also be provided between the frame of the housing 100 and the bottom plate 110, and between the frame of the housing 100 and the cover plate 120. This can ensure the sealing between the inside of the battery pack and the outside world, and prevent external moisture or dust and other impurities from entering the battery pack and affecting the normal use of the battery pack.

[0065] The battery pack can contain various compartments 300 with different functions, such as a battery compartment 310 containing individual battery cells 500, and an electrical compartment 320 containing electrical modules. The individual battery cells 500 in the battery compartment 310 can supply power to electrical devices equipped with the battery pack. The electrical modules in the electrical compartment 320 can be connected to the individual battery cells 500 and configured as components for power management, transmission, control, and protection. For example, the electrical module can include one or more of a battery circuit breaker unit (BDU), a charging control unit (CCU), a battery management unit (BMS), and an inverter unit (VZL).

[0066] Additionally, it should be noted that, in the case of a sealed gap between battery compartments 310, explosion-proof valves and pressure relief valves can be installed on battery compartments 310 to balance the air pressure inside the battery compartments.

[0067] The battery compartment 310 and the electrical compartment 320 can be arranged in various ways, for example, such as Figures 3 to 8 As shown, the multiple compartments 300 within the housing 100 may include multiple battery compartments 310 separated by beams 200; the battery pack housing assembly may also include an electrical compartment 320 located on the side of the cover plate 120 facing away from the bottom plate 110. That is, the electrical compartment 320 is located outside the housing 100. This arrangement of the electrical compartment 320 does not occupy the internal space of the housing 100, allowing more space within the housing 100 to accommodate the battery compartments 310, thereby increasing the number of battery cells 500 and improving the power output of the battery pack.

[0068] Alternatively, in a plurality of compartments 300 including battery compartment 310 and electrical compartment 320, adjacent battery compartments 310 and electrical compartments 320 may be separated by at least a portion of beams 200; and / or, two adjacent battery compartments 310 may be separated by at least a portion of beams 200. That is, the electrical compartment 320 may be located inside the housing 100 and adjacent to at least one battery compartment 310. The electrical compartment 320 arranged in this way will not occupy space outside the housing 100, which can reduce the volume of the housing assembly and the battery pack as a whole to a certain extent, and facilitate the arrangement and installation of other structures outside the battery pack.

[0069] As can be seen, staff can adapt the arrangement of the electrical compartment 320 and the battery compartment 310 according to the installation environment and usage requirements of the battery pack.

[0070] In addition, an electrical module in an electrical compartment 320 can correspond to one or more battery cells 500 in a battery compartment 310. Compared with the one-to-one correspondence between electrical compartments 320 and battery compartments 310, this arrangement can minimize the number of electrical compartments 320, thereby reducing the overall volume of the housing assembly.

[0071] The second aspect of this disclosure, such as Figures 3 to 8 As shown, a battery pack is provided, including a battery cell 500 and a housing assembly of the battery pack described above. The battery cell 500 can be disposed in a compartment 300 configured as a battery compartment 310. It should be noted that this battery pack can have all the beneficial effects of the housing assembly of the battery pack described above, which will not be repeated here.

[0072] In embodiments of this disclosure, such as Figures 3 to 7 As shown, the beam 200 can extend along the second direction B to separate two adjacent battery compartments 310 along the third direction C. The second direction B is perpendicular to the third direction C. The beam 200 has two sidewalls facing away from each other along the third direction C. The battery cell 500 can include two first sidewalls 510 arranged opposite each other along the third direction C and two second sidewalls 520 arranged opposite each other along the second direction B. The area of ​​the first sidewalls 510 is larger than the area of ​​the second sidewalls 520, and the first sidewalls 510 are parallel to the sidewalls. That is, the larger surface of the battery cell 500 can be arranged opposite to the beam 200. In this way, the contact area between the battery cell 500 and the beam 200 can be increased directly or indirectly. Therefore, when the battery cell 500 generates expansion force due to charging and discharging, the beam 200 can play a role in transmitting and absorbing the expansion force to a certain extent.

[0073] In addition, in order for beam 200 to better transmit and absorb expansion forces, its interior can be designed as a hollow structure.

[0074] The aforementioned direct increase in the contact area between the battery cell 500 and the beam 200 means that the battery cell 500 can directly contact the beam 200, thereby enabling the beam 200 to transmit and absorb the expansion force generated by the battery cell 500. The indirect increase in the contact area between the battery cell 500 and the beam 200 means that when there is a certain gap between the battery cell 500 and the beam 200, some buffer structures 8 can be set in the gap. The buffer structures 8 can indirectly transmit the expansion force generated by the battery cell 500 to the beam 200, so that the beam 200 can transmit and absorb the expansion force.

[0075] In addition, such as Figure 7As shown, the buffer structure 8 can be set at different positions in the housing 100 as needed. A buffer structure 8 is provided between two opposing first sides 510 of adjacent battery cells 500 along the third direction C; and / or, along the third direction C, a buffer structure 8 is provided between the housing 100 and the first side 510 of adjacent battery cells 500; and / or, along the third direction C, a buffer structure 8 is provided between the beam 200 and the first side 510 of adjacent battery cells 500. It can be seen that the buffer structure 8 not only absorbs and transmits expansion force when the battery cell 500 generates expansion force, but also absorbs and transmits external force to a certain extent when the battery pack is subjected to external impact. Therefore, it reduces the damage caused to the battery cells 500 by external impact, providing a certain degree of protection for the battery cells 500 and improving the safety of the battery pack.

[0076] For example, the buffer structure 8 may include at least one of a heat exchange plate structure, such as a cold plate, a second colloid structure, such as potting compound, and a buffer pad. Using a heat exchange plate structure as the buffer structure 8 can regulate the temperature of the battery cell 500 while providing a buffering effect, so as to ensure that the operating temperature of the battery cell 500 is maintained within the normal range. Using potting compound as the buffer structure 8 can simplify the structure in the housing 100 while providing a buffering effect. Using a buffer pad as the buffer structure 8 eliminates the need for other connecting structures, thereby improving the assembly and disassembly efficiency of the buffer structure 8.

[0077] In some possible implementations, such as Figure 2 As shown, an insulating structure 9 can be provided on the side wall of the beam 200. Since the two sides of the beam 200 may be adjacent to the battery cell 500, and the beam 200 itself may be made of metal structures such as aluminum profiles, an insulating structure 9 can be provided on the side wall of the beam 200 and the battery cell 500, which can play the role of insulation protection.

[0078] Among them, the insulation structure 9 can be selected from epoxy resin insulation layer, polyamide insulation layer, etc., and the insulation structure 9 can be set on the side wall surface by bonding or spraying.

[0079] In embodiments of this disclosure, such as Figures 3 to 5 , Figure 8 and Figure 9As shown, the electrical modules in the electrical compartment 320 of the battery pack can be connected to the battery cells 500 in the battery compartment 310 adjacent to the electrical compartment 320 via electrical connectors 10. The electrical connectors 10 pass through a through hole 11 on the partition structure 600 between the battery compartment 310 and the electrical compartment 320. A seal 12 is provided between the electrical connectors 10 and the through hole 11. The partition structure 600 is at least a portion of the beam 200 between the electrical compartment 320 and the battery compartment 310, or the partition structure 600 is a portion of the housing 100 between the electrical compartment 320 and the battery compartment 310. The sealing element 12 ensures the airtightness between the electrical compartment 320 and the battery compartment 310 while the electrical module and battery cell 500 are connected through the electrical connector 10. In this way, when the battery pack is under extreme conditions, such as thermal runaway of the battery cell 500 or water ingress into the battery compartment 310 causing the battery cell 500 to malfunction, it will not affect the electrical module in the electrical compartment 320 or the battery cells 500 in the other battery compartments 310, thus ensuring that the battery pack can work normally for a period of time.

[0080] For example, when the electrical compartment 320 is disposed on the cover plate 120 of the housing 100, that is, when the electrical compartment 320 is located outside the housing 100, the cover plate 120 of the housing 100 can form the aforementioned partition structure 600; and when the electrical compartment 320 is disposed inside the housing 100, that is, when at least one compartment 300 inside the housing 100 forms the electrical compartment 320, the beam 200 used to separate the multiple compartments 300 can form the aforementioned partition structure 600.

[0081] In addition, such as Figure 9 As shown, the seal 12 may include a sleeve portion 121 fitted onto the electrical connector 10 and an annular flange portion 122 disposed on the outer peripheral wall of the sleeve portion 121. The sleeve portion 121 passes through the through hole 11, and the annular flange portion 122 is sealingly connected to the partition structure 600. The sleeve portion 121 can cover the electrical connector 10 as much as possible. Under the combined action of the sleeve portion 121 and the annular flange portion 122, it can increase the contact area between the seal 12 and the electrical connector 10, and between the seal 12 and the partition structure 600, thereby ensuring the sealing between the electrical compartment 320 and the battery compartment 310.

[0082] In addition, such as Figure 9 As shown, in order to further ensure the airtightness of the electrical compartment 320 and the battery compartment 310, a sealing ring 13 can be provided between the annular flange portion 122 and the partition structure 600, and the annular flange portion 122 can be provided with a groove 1221 to accommodate the sealing ring 13.

[0083] In addition, such as Figure 9As shown, a ring-shaped weldable structural member 14 is connected to the outer periphery of the annular flange portion 122. The weldable structural member 14 is connected to the partition structure 600. The weldable structural member 14 can be a metal part to facilitate welding it to the partition structure 600. It can be connected to the annular flange portion 122 by adhesive bonding or hot riveting.

[0084] A third aspect of this disclosure is the provision of an electrical device that may include the aforementioned battery pack. It should be noted that all the beneficial effects of including the aforementioned battery pack in the electrical device are not elaborated upon here.

[0085] In addition, the aforementioned electrical equipment includes, but is not limited to, vehicles, electrical appliances, and energy storage equipment.

[0086] In summary, this disclosure exemplarily illustrates application scenarios for battery packs and the role of reinforcing structures in such scenarios.

[0087] Taking the battery pack on the vehicle as an example, the beam 200 can divide the interior of the housing 100 into two battery compartments 310 in the horizontal or vertical direction. The electrical compartment 320 can be set on the cover plate 120 of the housing 100 and sealed and separated from the battery compartment 310. The electrical module in the electrical compartment 320 can be connected to the battery cell 500 in the battery compartment 310 through the electrical connector 10.

[0088] Multiple chambers 3 can be provided inside the beam body 200. The first chamber 31 of the beam body 200 can be located near the bottom plate 110 of the shell 100, and the second chamber 32 of the beam body 200 can be located near the cover plate 120 of the shell 100. A connecting part 1 can be provided on the first chamber 31 and / or the second chamber 32. The through part 410 of the connector 400 can pass through the shell 100 and the connecting part 1 to enter the interior of the first chamber 31 and / or the second chamber 32. A reinforcing structure 2 can be provided in the first chamber 31 and / or the second chamber 32 so that the through part 410 of the connector 400 can be connected to the wall of the connecting part 1 and / or the chamber 3 through the reinforcing structure 2, thereby increasing the connection area and / or contact area between the connector 400 and the beam body 200 and improving the connection strength between the two. In this way, when the bottom of the vehicle is impacted, the sealing failure between the inside of the housing assembly and the outside and / or between the various compartments 300 inside the housing assembly can be reduced or even avoided, thereby improving the sealing and safety of the battery pack.

[0089] In addition, the interior of the beam 200 can be hollow and an insulating structure 9 can be provided on its side wall. Thus, the beam 200 can also play a role in transmitting and absorbing the expansion force of the battery cell 500.

[0090] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0092] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A housing assembly for a battery pack, characterized in that, include: case; A beam, disposed within the shell to divide the shell into multiple compartments, the beam including at least one connecting portion connected to the shell via a connector, the connector extending through the shell and the connecting portion; and, A reinforcing structure is provided on at least one of the connecting portions on a first side away from the housing, the reinforcing structure being connected to the beam and to the through portion of the connector located on the first side.

2. The housing assembly of the battery pack according to claim 1, characterized in that, The beam has a first end and a second end opposite to each other along a first direction, at least one of the first end and the second end is provided with the connecting portion, and the reinforcing structure is located between the first end and the second end.

3. The housing assembly of the battery pack according to claim 2, characterized in that, The beam has at least one chamber located between the first end and the second end, and the reinforcing structure is disposed in at least one of the chambers.

4. The housing assembly of the battery pack according to claim 3, characterized in that, The number of chambers is multiple, and the wall of at least one of the chambers located at the first end and the chambers located at the second end forms the connecting portion.

5. The housing assembly of the battery pack according to claim 3, characterized in that, Both the first end and the second end are provided with the connecting portion, the number of the chambers is one, the reinforcing structure is disposed in the chamber and connected to the through portion of the connector on at least one of the connecting portions.

6. The housing assembly of the battery pack according to claim 3, characterized in that, The reinforcing structure fills at least a portion of the cavity in which it is located to cover at least a portion of the through portion.

7. The housing assembly of the battery pack according to claim 6, characterized in that, The reinforcing structure includes a first colloidal structure.

8. The housing assembly of the battery pack according to claim 2, characterized in that, The housing includes a bottom plate and a cover plate opposite each other along a first direction, a first end of the beam is adjacent to the bottom plate, and a second end of the beam is adjacent to the cover plate. One of the first and second ends of the beam is provided with the connecting portion, and the connecting member on the connecting portion is connected to the reinforcing structure; the other of the first and second ends of the beam is provided with a structural plate portion, which is bonded to or spaced apart from the corresponding bottom plate or cover plate; or... The first and second ends of the beam are each provided with the connecting portion, and at least one of the connecting members on each connecting portion is connected to the reinforcing structure.

9. The housing assembly of the battery pack according to claim 8, characterized in that, The beam extends along a second direction and is located between two adjacent compartments along a third direction. The beam includes two opposite side plates along the third direction. The connecting portion and / or the structural plate portion are connected to the two side plates. One or more cavities are formed between the two side plates. The reinforcing structure is provided in at least one of the cavities.

10. The housing assembly of the battery pack according to claim 9, characterized in that, The multiple chambers are separated by one or more partitions connected between the two side plates.

11. The housing assembly of the battery pack according to claim 1 or 2, characterized in that, The reinforcing structure is integrally formed into the beam.

12. The housing assembly of the battery pack according to claim 1, characterized in that, The connecting part and the housing are sealed together by a first sealing element.

13. The housing assembly of the battery pack according to claim 1, characterized in that, The housing includes a bottom plate and a cover plate opposite each other along a first direction. A first sealing element is provided between the beam and the bottom plate, and between the beam and the cover plate, to isolate the multiple compartments on both sides of the beam.

14. The housing assembly of the battery pack according to claim 13, characterized in that, The plurality of compartments includes a plurality of battery compartments separated by the beam; The battery pack housing assembly also includes an electrical compartment located on the side of the cover plate opposite to the base plate.

15. The housing assembly of the battery pack according to claim 13, characterized in that, The multiple compartments include battery compartments and electrical compartments. The adjacent battery compartment and the electrical compartment are separated by at least a portion of the beams; and / or, The two adjacent battery compartments are separated by at least part of the beam.

16. A battery pack, characterized in that, The battery pack includes a housing assembly comprising a battery cell and a battery pack according to any one of claims 1-15, wherein the battery cell is disposed in a compartment configured as a battery compartment.

17. The battery pack according to claim 16, characterized in that, The beam extends along a second direction to separate two adjacent battery compartments along a third direction, the second direction being perpendicular to the third direction. The beam has two sidewalls facing away from each other along the third direction. The battery cell includes two first sidewalls facing away from each other along the third direction and two second sidewalls facing away from each other along the second direction. The area of ​​the first sidewalls is larger than the area of ​​the second sidewalls, and the first sidewalls are parallel to the sidewalls.

18. The battery pack according to claim 17, characterized in that, An insulating structure is provided on the side wall surface of the beam.

19. The battery pack according to claim 17, characterized in that, The electrical modules in the electrical compartment of the battery pack are connected to individual battery cells in the adjacent battery compartment via electrical connectors. The electrical connectors pass through a through-hole in the partition structure between the battery compartment and the electrical compartment. A seal is provided between the electrical connectors and the through-hole. The partition structure is at least a portion of the beam between the electrical compartment and the battery compartment, or the partition structure is a portion of the housing between the electrical compartment and the battery compartment.

20. The battery pack according to claim 19, characterized in that, The sealing element includes a sleeve portion fitted onto the electrical connector and an annular flange portion disposed on the outer peripheral wall of the sleeve portion. The sleeve portion passes through the through hole, and the annular flange portion is sealed to the partition structure.

21. The battery pack according to claim 20, characterized in that, A sealing ring is provided between the annular flange portion and the partition structure, and the annular flange portion is provided with a groove to accommodate the sealing ring; and / or, The outer periphery of the annular flange portion is connected to an annular weldable structural component, which is connected to the partition structure.

22. An electrical appliance, characterized in that, The battery pack includes any one of claims 16-21.

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