Box body and battery pack

Abstract

The invention provides a box body and a battery pack, and relates to the technical field of battery packs. The box body comprises a shell, a baffle and a sealing sleeve. The shell is provided with a containing cavity with an opening in one side. The baffle is arranged in the shell and used for dividing the containing cavity into a first cavity body and a second cavity body. The baffle is provided with a fixing hole communicating with the first cavity and the second cavity. The sealing sleeve is provided with a through hole which is used for being sleeved with an installation component. And the sealing sleeve is arranged between the mounting component and the hole wall of the fixing hole. And a notch communicated with the through hole is formed in the sealing sleeve. The sealing sleeve can achieve sealing and buffering effects, prevents colloid and the like from flowing into the second cavity from the first cavity, and is convenient to install and good in sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a box and a battery pack. Background Art

[0002] The inventors' research has revealed that existing complete machines and vehicles have high requirements for battery life and cost, making battery system safety a crucial component that cannot be ignored. Current cylindrical battery systems have low internal space utilization during the assembly of cylindrical cells, and the assembly process is complex. The battery compartment and electrical cavity may not be properly sealed during assembly, allowing glue from the battery compartment to easily overflow into the electrical compartment, contaminating the compartment and complicating assembly operations. Summary of the Invention

[0003] The object of the present invention is to provide a box and a battery pack with high space utilization, good sealing and low assembly difficulty.

[0004] In a first aspect, the present invention provides a box, comprising:

[0005] A housing having an accommodating cavity with an opening on one side;

[0006] a baffle, the baffle being provided in the housing and being used to divide the accommodating cavity into a first cavity and a second cavity; the baffle being provided with a fixing hole communicating with the first cavity and the second cavity;

[0007] A sealing sleeve, wherein the sealing sleeve is provided with a through hole; the through hole is used to sleeve the mounting component, and the sealing sleeve is provided between the mounting component and the hole wall of the fixing hole;

[0008] The sealing sleeve is provided with a cutout communicated with the through hole.

[0009] In an optional embodiment, the sealing sleeve is provided with a plurality of the cutouts, and the plurality of the cutouts are evenly distributed around the periphery of the through hole.

[0010] In an optional embodiment, the incision includes a first incision and a second incision, the first incision is arranged along the height direction of the baffle, and the second incision is arranged along the width direction of the baffle, the length of the first incision in the height direction is greater than the length of the second incision in the width direction; the height direction and the width direction are respectively perpendicular to the axial direction of the through hole.

[0011] In an optional embodiment, the plurality of first incisions are evenly spaced apart in the width direction, and the plurality of second incisions are evenly spaced apart in the height direction;

[0012] And / or, the lengths of the plurality of first incisions are equal, and the lengths of the plurality of second incisions are equal.

[0013] In an optional embodiment, the distance between two adjacent first incisions is greater than the distance between two adjacent second incisions.

[0014] In an optional embodiment, the sealing sleeve is provided with a plurality of through holes, and the through holes include a first through hole and a second through hole;

[0015] The cross section of the first through hole is rectangular, the first cutouts are spaced apart along the two long sides of the rectangle, and the second cutouts are spaced apart along the two short sides of the rectangle;

[0016] The cross section of the second through hole is circular or elliptical; a plurality of third cutouts are provided on the wall of the second through hole;

[0017] The first through holes and the second through holes are alternately arranged along the length direction of the baffle.

[0018] In an optional embodiment, the third incision is not provided on a side of the second through hole away from the opening of the accommodating cavity;

[0019] And / or, the lengths of the multiple third incisions are not equal, and the multiple third incisions are symmetrically distributed about the center line of the second through hole in the left and right directions, and the left and right directions are the width directions of the baffle; the closer to the center line, the longer the length of the third incision; the farther away from the center line, the shorter the length of the third incision.

[0020] In an optional embodiment, a gap of 0.1 mm to 0.8 mm is provided between the through hole and the mounting component;

[0021] And / or, the width of the incision is no greater than 0.5 mm.

[0022] In an optional embodiment, the baffle is further provided with a pipe fixing hole, a sealing sleeve is provided in the pipe fixing hole, the sealing sleeve is provided with a third through hole, and the hole wall of the third through hole is provided with the incision.

[0023] In a second aspect, the present invention provides a battery pack comprising a box as described in any one of the aforementioned embodiments.

[0024] The box and battery pack provided by the embodiments of the present invention have the following beneficial effects:

[0025] The box provided by the embodiment of the present invention utilizes a baffle to divide the storage cavity into a first cavity and a second cavity. The first cavity serves as the battery compartment, and the second cavity serves as the electrical cavity, with the two cavities being independent of each other. To prevent colloids and other substances in the first cavity from overflowing into the second cavity, a sealing sleeve is provided on the baffle to provide good sealing, and a cutout in the sealing sleeve improves installation convenience. The result is a compact structure with high grouping efficiency, fully utilizing the space within the pack, improving integration and the energy density of the battery pack.

[0026] The battery pack provided by the embodiment of the present invention includes the above-mentioned box body, has a compact structure, high grouping efficiency, good sealing, convenient installation, can fully utilize the space inside the pack, and improve the integration and energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic structural diagram of a box provided in an embodiment of the present invention;

[0029] Figure 2 A schematic structural diagram of a baffle of a box provided in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of the separated baffle and sealing sleeve of the box body provided by an embodiment of the present invention;

[0031] Figure 4 A schematic structural diagram of a sealing sleeve of a box body provided by an embodiment of the present invention;

[0032] Figure 5 A schematic structural diagram of a cutout on a sealing sleeve of a box body provided by an embodiment of the present invention;

[0033] Figure 6 A schematic structural diagram of a battery pack provided in an embodiment of the present invention.

[0034] Icon: 100-box; 110-shell; 101-accommodating chamber; 102-first cavity; 103-second cavity; 120-baffle; 121-fixing hole; 123-pipe fixing hole; 130-sealing sleeve; 131-through hole; 132-incision; 133-first incision; 134-second incision; 135-first through hole; 136-second through hole; 137-third through hole; 138-third incision; 139-fourth incision; 200-battery pack; 210-battery; 222-high-voltage connecting row; 234-liquid inlet pipe; 235-liquid outlet pipe. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0040] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0042] Combine Figures 1 to 3 、 Figure 6 This embodiment provides a box 100 for use in a battery pack 200. The box 100 includes a shell 110, a baffle 120, and a sealing sleeve 130. The shell 110 has a accommodating cavity 101 with an opening on one side. The baffle 120 is arranged in the shell 110, and is used to divide the accommodating cavity 101 into a first cavity 102 and a second cavity 103. Among them, the first cavity 102 serves as a battery 210 compartment for placing multiple batteries 210, and the multiple batteries 210 are connected in series and parallel to form a group. The second cavity 103 is used as an electrical compartment, and can be used to install an electronic control unit BDU, set electrical components, etc. The baffle 120 is provided with a fixing hole 121 that connects the first cavity 102 and the second cavity 103. The sealing sleeve 130 is provided with a through hole 131, and the through hole 131 is used to sleeve the installation component. The sealing sleeve 130 is arranged between the installation component and the hole wall of the fixing hole 121. The sealing sleeve 130 is provided with a cutout 132 communicating with the through hole 131. The sealing sleeve 130 can achieve sealing and buffering effects, preventing colloids and the like from flowing from the first cavity 102 into the second cavity 103, and is easy to install and has good sealing performance.

[0043] It should be noted that in order to better fix the multiple batteries 210 in the first cavity 102, structural adhesive will be poured into the first cavity 102 during the assembly process of the battery pack 200. The structural adhesive plays a role in heat dissipation, insulation, buffering and fixing. Since a fixing hole 121 is provided in the baffle 120, the fixing hole 121 is used to realize the cross-region connection of the installation components in the first cavity 102 and the second cavity 103. The installation components include but are not limited to high and low voltage connectors, such as high-voltage connection bars 222 and low-voltage wiring harnesses. One end of the high-voltage connection bar 222 is used to connect to the output positive pole or output negative pole of the battery 210 in the battery 210 compartment, and the other end is connected to the high-voltage device in the electrical compartment. Therefore, one end of the high-voltage connection bar 222 is located in the battery 210 compartment, and the other end is provided in the electrical compartment through the fixing hole 121 of the baffle 120. To prevent the structural adhesive in the first cavity 102 from overflowing from the fixing holes 121 into the second cavity 103, a sealing sleeve 130 is provided on the baffle 120 in this embodiment to seal the fixing holes 121 of the baffle 120. The sealing sleeve 130 provides sealing, shock absorption, and insulation. The cutout 132 in the sealing sleeve 130 provides better access for mounting components, making installation more convenient.

[0044] It's easy to understand that if the diameter of through-hole 131 in sealing sleeve 130 is too small, mounting components will not fit easily through it, making assembly difficult and inefficient. If the diameter of through-hole 131 in sealing sleeve 130 is too large, the colloid will easily overflow, resulting in poor sealing. Therefore, in this embodiment, notches 132 are provided in the peripheral wall of through-hole 131. This ensures both easy access for mounting components and convenient assembly while also ensuring good sealing. This results in a simple structure, high assembly efficiency, and excellent sealing.

[0045] Optionally, the baffle 120 is provided with a plurality of fixing holes 121. Each fixing hole 121 is provided with a sealing sleeve 130. The sealing sleeve 130 is used to seal the gap between the mounting component and the wall of the fixing hole 121. The multiple sealing sleeves 130 can be provided separately or integrally formed. It is sufficient that the sealing sleeve 130 has a through hole 131 for the mounting component to pass through. Each sealing sleeve 130 can be provided with one or more through holes 131 as needed.

[0046] In this embodiment, the baffle 120 is provided with two spaced apart fixing holes 121. The sealing sleeves 130 in the two fixing holes 121 are integrally formed, meaning a larger sealing sleeve 130 is provided to cover both fixing holes 121. This means that both ends of the sealing sleeve 130 can be embedded in the fixing holes 121, and the center of the sealing sleeve 130 can abut the baffle 120 between the two fixing holes 121, thereby improving the stability of the sealing sleeve 130. To further improve the connection stability, glue can be applied to the center of the sealing sleeve 130 corresponding to the baffle 120, so that the center of the sealing sleeve 130 is adhered to the baffle 120, preventing the sealing sleeve 130 from shifting or falling off during installation. In this embodiment, the sealing sleeve 130 has four spaced apart through-holes 131, each for the positive and negative high-voltage connection bars 222 and the low-voltage wiring harness, respectively. It is understood that the four through-holes 131 in the sealing sleeve 130 include two first through-holes 135 and two second through-holes 136. One first through-hole 135 and one second through-hole 136 are correspondingly disposed in one fixing hole 121, while another first through-hole 135 and another second through-hole 136 are correspondingly disposed in another fixing hole 121. The two first through-holes 135 are used to pass through the positive and negative high-voltage connection bars 222, and the two second through-holes 136 are used to pass through two sets of low-voltage wiring harnesses. The two first through-holes 135 and the two second through-holes 136 are alternately spaced along the length of the baffle 120, so that the positive high-voltage connection bar, the low-voltage wiring harness, the negative high-voltage connection bar, and the low-voltage wiring harness are sequentially arranged along the length of the baffle 120. This ensures electrical clearance between the positive and negative high-voltage connection bars and facilitates the installation of the low-voltage wiring harness, avoiding congestion caused by placing the positive and negative high-voltage connection bars on opposite sides. Having multiple through-holes 131 in a single sealing sleeve 130 helps reduce the number of sealing sleeves 130 used, improves the installation efficiency of the sealing sleeves 130, and thus improves the overall assembly efficiency.

[0047] Of course, in some embodiments, a larger fixing hole 121 may be provided on the baffle 120 , a sealing sleeve 130 is provided in the fixing hole 121 , and a plurality of spaced through holes 131 are provided on the sealing sleeve 130 for the installation components to pass through.

[0048] Optionally, the sealing sleeve 130 is provided with a plurality of cutouts 132 evenly distributed around the periphery of the through-hole 131. If the through-hole 131 is circular, the cutouts 132 are radially disposed along the circle. If the through-hole 131 is rectangular or another polygonal shape, the cutouts 132 are perpendicular to the edges. The shape and size of the through-hole 131 of the sealing sleeve 130 are designed based on the shape and size of the mounting component. The shape, width, number, and distribution of the cutouts 132 can be flexibly determined based on actual needs.

[0049] Optionally, the sealing sleeve 130 is provided with at least two cutouts 132. Thus, a flexible sealing strip can be formed between adjacent cutouts 132. The flexible sealing strip can deform relative to the sealing sleeve 130 body and deform more easily, thereby facilitating the expansion of the mounting aperture of the mounting component and improving the convenience of the mounting component passing through.

[0050] Combine Figure 4 Optionally, the incision 132 provided on the hole wall of the first through hole 135 includes a first incision 133 and a second incision 134. The first incision 133 is provided along the height direction of the baffle 120, and the second incision 134 is provided along the width direction of the baffle 120. The length of the first incision 133 in the height direction is greater than the length of the second incision 134 in the width direction. The height direction and the width direction are respectively perpendicular to the axial direction of the through hole 131. This arrangement is conducive to expanding the installation space in the vertical direction (height direction) and improving the convenience of installation. The width direction is the narrow side of the box body. Compared with the horizontal direction (width direction), the vertical direction is easier to install due to the opening on the top, and the first through hole 135 is provided at the end of the baffle 120 away from the bottom of the shell 110, which further improves the convenience of installation.

[0051] Optionally, the first through hole 135 has a rectangular cross-section, with one or more first cutouts 133 spaced along each of the two long sides of the rectangle, and one or more second cutouts 134 spaced along each of the two short sides of the rectangle. The multiple first cutouts 133 are evenly spaced along the width, and the multiple second cutouts 134 are evenly spaced along the height. This arrangement provides for more uniform force distribution on the sealing sleeve 130, improved sealing, and enhanced ease of installation of mounting components. It will be appreciated that the multiple first cutouts 133 along the two long sides of the rectangle can be arranged opposite each other or staggered, without specific limitation herein.

[0052] Optionally, the first cutouts 133 and the second cutouts 134 are of equal length. In this embodiment, the first cutouts 133 are spaced equidistantly from each other. The second cutouts 134 are spaced equidistantly from each other. The spacing between two adjacent first cutouts 133 is greater than the spacing between two adjacent second cutouts 134. This arrangement enhances the structural strength in the height direction, improves the holding force of the sealing sleeve 130 against the mounting components in the height direction, prevents excessive deformation of the sealing sleeve 130, and thus ensures a reliable seal.

[0053] At least two first cutouts 133 are provided along the width of the baffle 120, forming a flexible sealing strip between the two first cutouts 133. The sealing sleeve 130 is made of silicone rubber, which, due to its inherent adhesiveness, provides adhesion for adjacent flexible sealing strips to form a bond, ensuring a secure fit and improving sealing. Of course, in some embodiments, a single first cutout 133 may be provided.

[0054] Similarly, in the height direction of the baffle 120 , there may be one or more second cutouts 134 , which is not specifically limited here.

[0055] Combine Figure 5 Optionally, the cross-section of the second through hole 136 is circular or elliptical. The wall of the second through hole 136 is provided with a plurality of third cutouts 138. The circular or elliptical cross-section can better fit the low-voltage wiring harness, thereby improving the low-voltage wiring harness's passability and enhancing the sealing performance of the sealing sleeve 130.

[0056] When designing the third incision 138, it was considered that the low-voltage wiring harness is a flexible component and can abut against the lower hole wall of the second through hole 136 by its own weight to play a sealing role, and the lower hole wall of the second through hole 136 can also play a certain supporting role for the low-voltage wiring harness. Therefore, the third incision 138 can be omitted from the lower peripheral wall of the second through hole 136. In other words, the third incision 138 is not provided on the side of the second through hole 136 away from the opening of the accommodating cavity 101. That is, the third incision 138 is only provided in the radial direction on the upper hole wall of the second through hole 136. This can both play a supporting role and improve the sealing effect. It should be noted that the upper side and the lower side are relative here. Taking the center line of the second through hole 136 in the width direction of the baffle 120 as the reference, the third incision 138 can be omitted from the lower side within the range of 0 degrees to 80 degrees from the center line. Of course, the angle range of the deviation from the center line can be flexibly adjusted. For example, the range of not setting the third incision 138 is within 30 degrees of the lower side deviation from the center line, or within 50 degrees of the lower side deviation from the center line. No specific limitation is made here.

[0057] Optionally, the lengths of the plurality of third cuts 138 are unequal, and the plurality of third cuts 138 are symmetrically distributed about the center line of the second through hole 136 in the left-right direction, where the left-right direction is the width direction of the baffle 120. The closer to the center line, the longer the length of the third cut 138; the farther away from the center line, the shorter the length of the third cut 138. Due to the gravity of the low-voltage wiring harness itself, the force on the lower side of the second through hole 136 is greater than the force on the upper side, so the third cut 138 near the upper side of the center line can be longer. This arrangement can not only improve the passability of the low-voltage wiring harness and facilitate installation, but also ensure sealing performance and prevent colloid overflow.

[0058] Optionally, multiple third cutouts 138 are evenly spaced along the circumference, so that the sealing sleeve 130 is subjected to more uniform force, the installation components can pass through better, and the installation convenience is improved. At the same time, it can also prevent excessive deformation of the sealing sleeve 130 and ensure good sealing performance.

[0059] Of course, in some other embodiments, the third incision 138 may also be opened along the entire circumferential direction, or the lengths of the plurality of third incisions 138 may also be completely equal, which is not specifically limited here.

[0060] Optionally, a gap of 0.1mm to 0.8mm is provided between the through hole 131 and the mounting component. This arrangement can prevent the through hole 131 on the sealing sleeve 130 from being excessively deformed and causing glue overflow when the mounting component passes through the sealing sleeve 130. In this embodiment, the gap is approximately 0.5mm. The structural adhesive is made of foam adhesive, which has weak fluidity, and the structural adhesive will not overflow from the 0.5mm gap. Of course, in some other embodiments, the gap between the hole wall of the through hole 131 and the mounting component can also be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or any value between 0.1mm and 0.8mm, which is not specifically limited here.

[0061] It should be noted that the high-voltage connection bar 222 in this embodiment is a copper bar, which is a hard metal material, and the copper bar structure has a bending portion. In order to facilitate the high-voltage connection bar 222 to pass through the sealing sleeve 130 directly and smoothly as a whole, cuts 132 are provided in the width direction and height direction of the sealing sleeve 130, namely the first cut 133 and the second cut 134. The longer the length of the first cut 133 and the second cut 134, the more convenient it is for the high-voltage connection bar 222 to pass through. However, if the length is too long, it is easy to cause bending and glue overflow, and the sealing effect is poor. The shorter the length of the first cut 133 and the second cut 134, the smaller the installation space, the inability to install smoothly, and the greater the difficulty of assembly. The length of the first cut 133 in this embodiment is 1mm to 10mm, preferably 2mm to 6mm. The length of the second cut 134 is 1mm to 5mm, preferably 2mm to 4mm.

[0062] To prevent adhesive overflow and improve sealing, the width of the cutout 132 is no greater than 0.5 mm. In this embodiment, the width of the first cutout 133 and the second cutout 134 is approximately 0.5 mm. Of course, the width of the cutout 132 can also be 0.1 mm, 0.2 mm, 0.3 mm, or 0.4 mm, etc. This prevents structural adhesive from overflowing from the cutout 132, ensuring a good seal.

[0063] In order to ensure that the sealing sleeve 130 has good sealing performance when the first through hole 135 is rectangular, the cutouts 132 on the first through hole 135 were tested and verified. In the verification embodiment, the multiple first cutouts 133 on the long side of the rectangle are evenly spaced and the lengths of the multiple first cutouts 133 are equal. The "number of first cutouts 133 on the long side of the rectangle" in Table 1 refers to the number of first cutouts 133 on one long side. On each of the two short sides of the rectangle, two second cutouts 134 are provided, and the number of second cutouts 134 on both sides is equal. The verification results are shown in Table 1 below:

[0064] Table 1:

[0065]

[0066] As can be seen from Table 1, 2-3 first cutouts 133 are set on each long side of the first through hole 135. When the length of the first cutout 133 is greater than the length of the second cutout 134, the sealing effect is better, glue overflow will not occur, and installation is convenient.

[0067] To ensure good sealing performance of the sealing sleeve 130 when the second through hole 136 is circular, the design of the cutout 132 on the second through hole 136 was tested and verified. In the verification embodiment, the third cutout 138 was not provided within the approximately 120-degree range below. The closer to the upper side of the centerline, the longer the third cutout 138. The verification results are shown in Table 2 below:

[0068] Table 2:

[0069]

[0070] As can be seen from Table 2, the number of third cutouts 138 ranges from 15 to 18, with a minimum length greater than 10 mm and a maximum length no greater than 25 mm. This provides a good sealing effect and prevents glue overflow. Furthermore, the provision of third cutouts 138 improves installation convenience.

[0071] Optionally, the baffle 120 is further provided with two pipe fixing holes 123 for passing pipes through, each of which is equipped with a sealing sleeve 130. The sealing sleeve 130 is provided with a third through-hole 137, and a fourth notch 139 is provided on the outer periphery of the third through-hole 137. In this embodiment, the pipe fixing holes 123 respectively allow the liquid inlet pipe 234 and the liquid outlet pipe 235 to pass through, and the sealing sleeve 130 is used to improve the sealing performance of the liquid inlet pipe 234 and the liquid outlet pipe 235 passing through the fixing holes 121. The shape of the third through-hole 137 matches the cross-sectional shape of the liquid inlet pipe 234 and the liquid outlet pipe 235, respectively. Optionally, the third through-hole 137 is circular. Optionally, multiple fourth notches 139 are evenly spaced along the circumference of the third through-hole 137, and each of the fourth notches 139 has equal length. This improves the convenience of installing the liquid inlet pipe 234 and the liquid outlet pipe 235 while ensuring a good seal and preventing glue overflow.

[0072] Optionally, the two fixing holes 121 for the high- and low-voltage connectors are located at approximately the same height, relatively close to the top of the baffle 120. Two first through holes 135 and two second through holes 136 are spaced apart at the same height, and the two first through holes 135 and the two second through holes 136 are arranged alternately to prevent interference between the high-voltage connection bar 222 and the low-voltage wiring harness after installation, thereby improving electrical insulation performance. The pipe fixing holes 123 are relatively located at the bottom of the baffle 120. That is, the bottom of the baffle 120 is for the liquid inlet pipe 234 and the liquid outlet pipe 235 to pass through, and the upper portion of the baffle 120 is for the high- and low-voltage connectors to pass through. The liquid inlet pipe 234 and the liquid outlet pipe 235 are spaced apart in the height direction from the high- and low-voltage connectors, respectively. This compact structure saves space in the longitudinal direction of the box 100, which is beneficial for improving space utilization and the energy density of the battery pack 200.

[0073] An embodiment of the present invention also provides a battery pack 200, comprising a plurality of batteries 210, a high-voltage connection bar 222, a low-voltage wiring harness, a liquid inlet pipe 234, a liquid outlet pipe 235, a BDU and the aforementioned housing 100. A plurality of batteries 210 are arranged in the first cavity 102. One end of the high-voltage connection bar 222 is connected to the output positive pole or output negative pole of the battery 210, and the other end passes through the baffle 120 and is connected to the positive pole or negative pole of the BDU. One end of the low-voltage wiring harness is connected to the low-voltage connector in the first cavity 102, and the other end passes through the baffle 120 and extends into the second cavity 103. A thermal management interface, a heat exchange plate and a current collector are provided in the first cavity 102 for heat exchange of the batteries 210 in the first cavity 102. One end of the liquid inlet pipe 234 and the liquid outlet pipe 235 are respectively connected to the thermal management interface, and the other end passes through the baffle 120 and extends into the second cavity 103. The sealing sleeve 130 on the baffle 120 plays a sealing connection role, preventing the foam glue from overflowing from the first cavity 102 to the second cavity 103. It also has the functions of buffering, shock absorption and electrical insulation.

[0074] In summary, the box 100 and the battery pack 200 provided by the embodiment of the present invention have the following beneficial effects:

[0075] The box body 100 provided in the embodiment of the present invention utilizes a baffle 120 to divide the accommodating cavity 101 into a first cavity 102 and a second cavity 103. The first cavity 102 serves as a battery 210 compartment, and the second cavity 103 serves as an electrical cavity, and the two cavities are independent of each other. In order to prevent the colloid and other substances in the first cavity 102 from overflowing into the second cavity 103, a sealing sleeve 130 is provided on the baffle 120 to provide good sealing, and a cutout 132 is provided on the sealing sleeve 130 to improve installation convenience, a compact structure, and high grouping efficiency. The thermal management component is provided in the battery 210 compartment, which can make full use of the space inside the package, improve the integration and energy density of the battery pack 200.

[0076] The battery pack 200 provided by the embodiment of the present invention includes the above-mentioned box 100, which has a compact structure, good sealing, convenient installation, and high grouping efficiency. It can fully utilize the space inside the pack, improve the integration and energy density of the battery pack 200.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made should be included in the scope of protection of the present invention.

Claims

1. A box, characterized in that: include: A housing (110), wherein the housing (110) has a receiving cavity (101) with an opening on one side; a baffle (120), the baffle (120) being disposed in the housing (110) and being used to divide the accommodating cavity (101) into a first cavity (102) and a second cavity (103); the baffle (120) being provided with a fixing hole (121) communicating with the first cavity (102) and the second cavity (103); A sealing sleeve (130), wherein the sealing sleeve (130) is provided with a through hole (131); the through hole (131) is used for sleeve-mounting a mounting component, and the sealing sleeve (130) is arranged between the mounting component and the hole wall of the fixing hole (121); The sealing sleeve (130) is provided with a cutout (132) communicating with the through hole (131).

2. The box according to claim 1, characterized in that The sealing sleeve (130) is provided with a plurality of cutouts (132), and the plurality of cutouts (132) are evenly distributed around the periphery of the through hole (131).

3. The box according to claim 1, characterized in that The incision (132) includes a first incision (133) and a second incision (134), wherein the first incision (133) is arranged along the height direction of the baffle (120), and the second incision (134) is arranged along the width direction of the baffle (120), and the length of the first incision (133) in the height direction is greater than the length of the second incision (134) in the width direction; the height direction and the width direction are respectively perpendicular to the axial direction of the through hole (131).

4. The box according to claim 3, characterized in that: The plurality of first cutouts (133) are evenly spaced apart in the width direction, and the plurality of second cutouts (134) are evenly spaced apart in the height direction; And / or, the lengths of the plurality of first incisions (133) are equal, and the lengths of the plurality of second incisions (134) are equal.

5. The box according to claim 4, characterized in that: The distance between two adjacent first incisions (133) is greater than the distance between two adjacent second incisions (134).

6. The box according to claim 3, characterized in that: The sealing sleeve (130) is provided with a plurality of through holes (131), and the through holes (131) include a first through hole (135) and a second through hole (136); The cross section of the first through hole (135) is rectangular, the first cutouts (133) are spaced apart along the two long sides of the rectangle, and the second cutouts (134) are spaced apart along the two short sides of the rectangle; The cross section of the second through hole (136) is circular or elliptical; a plurality of third cutouts (138) are provided on the hole wall of the second through hole (136); The first through holes (135) and the second through holes (136) are alternately arranged along the length direction of the baffle (120).

7. The box according to claim 6, characterized in that: The third incision (138) is not provided on a side of the second through hole (136) away from the opening of the accommodating cavity (101); And / or, the lengths of the plurality of third incisions (138) are not equal, and the plurality of third incisions (138) are symmetrically distributed about the center line of the second through hole (136) in the left-right direction, where the left-right direction is the width direction of the baffle (120); the closer the position is to the center line, the longer the length of the third incision (138); the farther the position is from the center line, the shorter the length of the third incision (138).

8. The box according to claim 1, characterized in that: A gap of 0.1 mm to 0.8 mm is provided between the through hole (131) and the mounting component; And / or, the width of the incision (132) is no greater than 0.5 mm.

9. The box according to claim 1, characterized in that: The baffle (120) is further provided with a pipe fixing hole (123), a sealing sleeve (130) is provided in the pipe fixing hole (123), the sealing sleeve (130) is provided with a third through hole (137), and the hole wall of the third through hole (137) is provided with the notch (132).

10. A battery pack, characterized in that: The invention comprises a box according to any one of claims 1 to 9.

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