Cross beam, box body and battery pack

Abstract

The invention provides a cross beam, a box body and a battery pack, and relates to the technical field of battery production. The cross beam comprises a beam body, a first supporting seat and a second supporting seat. The beam body comprises a first side face and a top face which are adjacent. The first supporting base comprises a first base body and a sliding block arranged on the first base body in a sliding mode. The first base body is arranged on the top surface. The sliding block is used for being connected with a connecting bar. The second supporting base is arranged on the first side face and used for installing the end, away from the sliding block, of the connecting row. The cross beam is provided with the first supporting seat and the second supporting seat, can integrate high-voltage assemblies of the battery pack, is compact in structure, reasonably utilizes space, and improves the energy density of the battery pack. And interference between the high-voltage assembly and the low-voltage assembly can be avoided, and safety and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and particularly relates to a cross beam, a box body and a battery pack. Background Art

[0002] In existing battery systems, there is an increasing requirement for integration. Especially for the electrical compartment layout at the front end of the battery pack, due to the small space of the electrical compartment, when arranging high and low voltages in the battery system, there will be crossing, overlapping or even interference phenomena, which easily lead to potential safety hazards in the battery system. If sufficient space for high and low voltage layout is reserved in the battery compartment, the overall volume of the battery pack will be larger, or part of the space in the battery compartment will be compressed, reducing the overall energy density of the battery pack. Summary of the Invention

[0003] The purpose of the present invention is to provide a cross beam, a box body and a battery pack, which have a compact structure, high space utilization rate, can improve the energy density of the battery pack, and the high and low voltage layouts of the battery pack do not interfere with each other, being safe and reliable.

[0004] In a first aspect, the present invention provides a cross beam, including: A beam body, the beam body includes an adjacent first side surface and a top surface; A first support seat, the first support seat includes a first base body and a slider slidably arranged on the first base body; the first base body is arranged on the top surface; the slider is used for connecting with a connection row; A second support seat, the second support seat is arranged on the first side surface, and the second support seat is used for installing one end of the connection row away from the slider.

[0005] In an optional embodiment, the beam body is provided with a receiving cavity, and the first support seat and the second support seat are respectively at least partially arranged in the receiving cavity.

[0006] In an optional embodiment, the first base body includes a first substrate, a first wall body and a second wall body arranged oppositely, the first wall body and the second wall body are respectively connected to the first substrate; the first substrate is arranged parallel to the top surface, and the first wall body and the second wall body are arranged in the receiving cavity; The first substrate is provided with a first installation through hole, and the slider is arranged in the first installation through hole and can slide in the first installation through hole.

[0007] In an optional embodiment, a guide rail is arranged on the first wall body and / or the second wall body, and the slider is movably installed on the guide rail; And / or, the first substrate is provided with a second installation through hole, and the top surface is provided with a third installation through hole arranged opposite to the second installation through hole.

[0008] In an alternative embodiment, a threaded hole is provided on the slider, or a nut is embedded in the slider.

[0009] In an alternative embodiment, the second support base includes a second substrate and a mounting portion connected to the second substrate. The second substrate is arranged parallel to the first side surface, the mounting portion is located in the accommodating cavity, and the mounting portion is used for mounting the connection row.

[0010] In an alternative embodiment, the mounting portion includes a peripheral side wall protruding from the second substrate. A limiting card slot is provided on the peripheral side wall. One end of the limiting card slot is provided with a guiding portion, and the other end is provided with a stopping portion. The limiting card slot is used for mounting the connection row; And / or, an insulating protection wing is provided by extending the groove wall of the limiting card slot.

[0011] In an alternative embodiment, the second substrate is provided with a fourth mounting through hole, and the first side surface is provided with a fifth mounting through hole opposite to the fourth mounting through hole.

[0012] In a second aspect, the present invention provides a box body, including a bottom plate, side plates connected around the bottom plate, and a cross beam according to any one of the foregoing embodiments. The bottom plate and the side plates enclose a receiving groove; both ends of the cross beam are respectively connected to the side plates, and the cross beam divides the receiving groove into a first receiving groove and a second receiving groove.

[0013] In a third aspect, the present invention provides a battery pack, including a battery, a connection row, and a box body according to the foregoing embodiment. The battery is arranged in the first receiving groove, the battery is electrically connected to the connection row, the connection row is arranged in the cross beam, and the first side surface of the beam body faces the second receiving groove.

[0014] In an alternative embodiment, the connection row includes a main body portion, a first end portion and a second end portion connected to both ends of the main body portion. The first end portion is provided with an adjustment hole, and the second end portion is provided with a press riveting nut; And / or, the main body portion is coated with an insulating layer.

[0015] The beneficial effects of the cross beam, box body and battery pack provided by the embodiments of the present invention include: For the cross beam provided by the embodiment of the present invention, a first support base and a second support base are provided on the cross beam, and the connection row can be integrated, that is, the layout problem of the high-voltage components of the battery pack is solved. More space and layout flexibility are reserved for the layout of the low-voltage components, and the high-voltage and low-voltage components are not easily crossed and interfered, which is safe and reliable. And the structure is compact, the installation is convenient, the space utilization rate is high, which is beneficial to improving the overall energy density of the battery pack.

[0016] The box body provided by the embodiment of the present invention includes the above-mentioned cross beam, has a compact structure, small volume, high space utilization rate, and is beneficial to improving the overall energy density of the battery pack. Moreover, the layout of high-voltage and low-voltage components is not prone to cross and interference, and is safe and reliable.

[0017] The battery pack provided by the embodiment of the present invention includes the above-mentioned box body, has a compact structure, small volume, large overall energy density, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a partial structural schematic diagram of the battery pack provided by the embodiment of the present invention; Figure 2 It is Figure 1 a partial enlarged schematic diagram of part A in Figure 3 It is a structural schematic diagram of the cross beam provided by the embodiment of the present invention; Figure 4 It is a structural schematic diagram of the beam body provided by the embodiment of the present invention; Figure 5 It is a structural schematic diagram of the first support seat of the cross beam provided by the embodiment of the present invention from the first perspective; Figure 6 It is a structural schematic diagram of the first support seat of the cross beam provided by the embodiment of the present invention from the second perspective; Figure 7 It is a structural schematic diagram of the second support seat of the cross beam provided by the embodiment of the present invention from the first perspective; Figure 8 It is a structural schematic diagram of the second support seat of the cross beam provided by the embodiment of the present invention from the second perspective; Figure 9 It is a structural schematic diagram of the connection row of the battery pack provided by the embodiment of the present invention from the first perspective; Figure 10 It is a structural schematic diagram of the connection row of the battery pack provided by the embodiment of the present invention from the second perspective.

[0020] Icons: 100 - crossbeam; 110 - beam body; 111 - top surface; 112 - third mounting through - hole; 113 - first side surface; 114 - fifth mounting through - hole; 115 - accommodating cavity; 116 - first mounting interface; 117 - second mounting interface; 120 - first support base; 121 - first base body; 122 - first substrate; 123 - first mounting through - hole; 124 - second mounting through - hole; 125 - first wall body; 126 - second wall body; 127 - guide rail; 128 - connecting piece; 130 - slider; 131 - nut; 140 - second support base; 141 - second substrate; 142 - mounting part; 143 - limiting card slot; 144 - guiding part; 145 - stopping part; 146 - insulating protection wing; 147 - fourth mounting through - hole; 148 - sixth mounting through - hole; 200 - battery pack; 210 - box body; 211 - bottom plate; 212 - side plate; 230 - first accommodating groove; 240 - second accommodating groove; 250 - battery; 251 - metal sheet; 252 - fastener; 260 - connecting row; 261 - first end; 262 - second end; 263 - insulating layer; 264 - adjusting hole; 265 - press - riveting nut. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0025] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] Combined Figure 1 and Figure 2 , a cross beam 100 proposed in an embodiment of the present invention is applied to the box body 210 of the battery pack 200. The cross beam 100 is used to divide the accommodation groove of the box body 210 into a first accommodation groove 230 and a second accommodation groove 240. Among them, the first accommodation groove 230 is used to place the battery 250, that is, as a battery compartment. The second accommodation groove 240 serves as an electrical compartment for installing electrical control units such as BDU.

[0029] The battery in the battery compartment needs to be connected to the electronic control unit in the electrical compartment to control the charging and discharging of the battery and monitor the battery status. Generally, a high-voltage copper busbar crosses the crossbeam to electrically connect the battery and the electronic control unit, thus occupying the position of the top area of the crossbeam, interfering with the overall layout of the battery pack. At the same time, it will also cause the copper busbar to be too long, increasing the resistance and power loss. In addition, the longer the copper busbar, the greater the bending and tensile stress it receives. Under the action of variable stresses such as long-term bumps and vibrations, it is more likely to generate mechanical fatigue, resulting in problems such as cracks and fractures in the copper busbar, affecting the durability and lifespan of the battery pack.

[0030] Based on this, in the embodiments of the present invention, the crossbeam 100 includes a beam body 110, a first support seat 120, and a second support seat 140. The beam body 110 includes an adjacent first side surface 113 and a top surface 111. The first support seat 120 includes a first base body 121 and a slider 130 slidably disposed on the first base body 121. The first base body 121 is disposed on the top surface 111. The slider 130 is used to connect with the connection row 260. The second support seat 140 is disposed on the first side surface 113, and the second support seat 140 is used to install one end of the connection row 260 away from the slider 130. The crossbeam 100 is provided with the first support seat 120 and the second support seat 140, which can reasonably arrange the connection row 260 of the battery pack 200, not only solving the layout problem of the high-voltage components of the battery pack 200, but also reserving more space and layout flexibility for the layout of the low-voltage components, and can avoid problems such as crossing, overlapping, and interference in the layout between the high-voltage and low-voltage components, improving safety and reliability. At the same time, the length of the high-voltage busbar is reduced, the overall energy efficiency is improved, and the structure is compact, saving the space of the box body 210 and improving the energy density of the battery pack 200.

[0031] Combined with Figure 3 and Figure 4 , optionally, the beam body 110 is provided with a first installation interface 116 and a second installation interface 117. The first support seat 120 is disposed at the first installation interface 116. The second support seat 140 is disposed at the second installation interface 117.

[0032] In an alternative embodiment, the first installation interface 116 and the second installation interface 117 correspond to each other, so as to introduce the connection row 260 in the battery compartment into the electrical compartment through the first support seat 120 and the second support seat 140. In another embodiment, two first installation interfaces 116 correspond to one second installation interface 117, and the two first installation interfaces 116 are disposed on both sides of the second installation interface 117, so that the two first support seats 120 lead out the two connection rows 260 from the second support seat 140 at the same second installation interface 117, further improving the space utilization rate and reducing the cost at the same time.

[0033] The beam body 110 is provided with a receiving cavity 115, and the first support base 120 and the second support base 140 are respectively at least partially disposed in the receiving cavity 115. In this embodiment, the beam body 110 is made of aluminum profile or aluminum alloy profile and has a hollow structure, that is, the internal cavity of the beam body 110 serves as the receiving cavity 115 for the first support base 120 and the second support base 140. The structure is more compact, reducing the extra volume occupied by the first support base 120 and the second support base 140 in the box body 210, and the space utilization rate is higher.

[0034] It can be understood that one end of the connection row 260 is installed on the first support base 120, and the other end is installed on the second support base 140. The connection row 260 is also disposed in the receiving cavity 115. With this arrangement, most of the magnetic field generated by the connection row 260 is shielded by the beam body 110 made of metal material, thereby reducing the signal interference with other connection rows or low-voltage acquisition wire harnesses and improving the electromagnetic compatibility of the battery pack. The cross beam also plays a certain role in wrapping and fixing the connection row 260, thereby restricting the vibration amplitude of the connection row 260 and reducing problems such as bending, twisting, and breaking of the connection row during vehicle driving due to vibration. At the same time, since the connection row 260 is arranged in the receiving cavity 115 of the beam body 110, the space outside the beam body 110 is saved, making the overall design of the battery pack 200 more flexible and convenient. Moreover, with this arrangement, the length of the connection row 260 can be greatly shortened. At the same time, there is no need to cross the space above the cross beam 100, greatly reducing the occupation of the Z-direction height space and improving the overall energy density. The production and manufacturing of the battery pack 200 products are also more convenient and fast.

[0035] Combined with Figure 5 and Figure 6 , optionally, the first base body 121 includes a first base plate 122, a first wall body 125 and a second wall body 126 which are oppositely arranged. The first wall body 125 and the second wall body 126 are respectively connected to the first base plate 122. The first base plate 122 is arranged parallel to the top surface 111, and the first wall body 125 and the second wall body 126 are disposed in the receiving cavity 115. The first base plate 122 is provided with a first mounting through hole 123, and the slider 130 is disposed in the first mounting through hole 123 and can slide in the first mounting through hole 123. The connection row 260 connected to the first support base 120 is used to connect with the battery 250. By arranging the first base plate 122 on the top surface 111, the connection row 260 and the battery 250 can be installed from above, improving the installation convenience of the connection row 260 and the battery 250. The cross-sectional area of the first mounting through hole 123 is larger than the cross-sectional area of the slider 130, so as to ensure that the slider 130 can slide in the first mounting through hole 123.

[0036] The first wall body 125 and the second wall body 126 are connected to the opposite two side walls along the length direction of the beam body 110 of the first installation through hole 123, so as to clamp the slider 130 between the two parallel first wall body 125 and the second wall body 126, enabling the slider 130 to move along the length direction of the beam body 110 and playing a certain protective role for the slider 130. And a guide rail 127 is provided on the first wall body 125 and / or the second wall body 126, and the slider 130 is movably installed on the guide rail 127, which can limit the position of the slider 130 along the height direction of the beam body 110 and prevent the slider 130 from shifting during the sliding process. In this embodiment, in order to make the slider 130 move more smoothly and smoothly, guide rails 127 are respectively provided on the first wall body 125 and the second wall body 126, and the heights of the two guide rails 127 can be the same or different, which is set according to needs. Of course, in some other embodiments, the guide rail 127 can be provided only on the first wall body 125 or the second wall body 126, which is not specifically limited here.

[0037] Optionally, a second installation through hole 124 is provided on the first substrate 122, and a third installation through hole 112 is provided on the top surface 111 opposite to the second installation through hole 124. By sequentially inserting the connecting member 128 into the second installation through hole 124 and the third installation through hole 112, the fixed connection between the first support base 120 and the beam body 110 can be realized. The connecting member 128 includes but is not limited to screws, bolts, rivets, pins or plastic buckles, etc., which is not specifically limited here. Of course, the first support base 120 and the beam body 110 can also be fixed by clamping, bonding, plugging or other connection methods.

[0038] Optionally, the slider 130 is provided with a threaded hole. Alternatively, a nut 131 is embedded in the slider 130. Such a setting facilitates the fixed connection of the connection row 260 and the slider 130 by using bolts or the like. In this embodiment, a nut 131 is embedded in the slider 130. The threaded hole is provided at the top of the slider 130, and the nut 131 is embedded into the threaded hole from the top of the slider 130, so as to realize the connection of the connection row 260 and improve the operation convenience. It should be noted that the first installation through hole 123 is a long strip hole, and its length direction is the same as the length direction of the beam body 110. When installing the connection row 260 to the first support seat 120, first slide the slider 130 to one end of the first installation through hole 123, at a position away from the connection row 260. Place one end of the connection row 260 into the first installation through hole 123, so that the connection row 260 exposes from the first installation through hole 123, and then slide the slider 130 below the connection row 260, so that the nut 131 on the slider 130 corresponds to the adjustment hole 264 on the connection row 260, and then use a bolt to insert into the adjustment hole 264 and the nut 131 to lock, so as to realize the fixed connection of the connection row 260 and the slider 130. When the connection row 260 needs to be connected to the battery 250 in the battery compartment, set the output pole of the battery on the connection row 260, and use bolts to sequentially pass through the output pole and the connection row, and lock with the nut 131 to further improve the installation efficiency.

[0039] It can be understood that since the slider 130 can move, the installation of the connection row 260 is more convenient. In addition, the adjustment hole 264 provided on the connection row 260 is an oval hole, which allows assembly under certain processing errors or installation errors, reduces the assembly difficulty, and reduces the processing and manufacturing difficulty of parts. It has better flexibility and stronger adaptability. At the same time, the slider 130 is movably arranged, which can adapt to the design of different battery 250 sizes, can adaptively adjust the position of the slider 130 according to the position of the metal sheet, and cooperate with the adjustment of the connection row 260, so as to improve the applicability of the cross beam 100.

[0040] Combined with Figure 7 and Figure 8 Optionally, the second support seat 140 includes a second substrate 141 and a mounting portion 142 connected to the second substrate 141. The second substrate 141 is arranged parallel to the first side surface 113, and the mounting portion 142 is located in the accommodation cavity 115. The mounting portion 142 is used for mounting the connection row 260. The second substrate 141 is arranged on the first side surface 113, and the first side surface 113 corresponds to the electrical compartment, so as to facilitate connection with the electronic control unit, shorten the connection distance between the connection row 260 and the electronic control unit in the electrical compartment. The connection row 260 is connected to the electronic control unit in the electrical compartment through a high-voltage busbar (not shown). Such a design can reduce the length of the high-voltage busbar, reduce the resistance, improve the energy efficiency, and also facilitate the layout of the high-voltage busbar and reduce the space occupied by the high-voltage busbar.

[0041] Optionally, the installation part 142 includes a peripheral side wall protruding from the second substrate 141. The peripheral side wall forms a surrounding frame to accommodate a part of the connection row 260. The peripheral side wall is provided with a limiting card slot 143. One end of the limiting card slot 143 is provided with a guiding part 144, and the other end is provided with a stopping part 145. The guiding part 144 is arranged at one end of the limiting card slot 143 far from the second substrate 141, and the stopping part 145 is arranged at one end of the limiting card slot 143 close to the second substrate 141. The limiting card slot 143 is used for installing the connection row 260. Thus, the connection row 260 can be snapped into the limiting card slot 143 from the end far from the second substrate 141 and finally abutted against the stopping part 145. It can be understood that a chamfer is provided at the notch of the limiting card slot 143 to form the guiding part 144, which is convenient for the connection row 260 to be inserted into the limiting card slot 143, with more convenient operation and higher installation efficiency. The bottom of the limiting card slot 143 serves as the stopping part 145 to limit the connection row 260. The limiting card slot 143 extends in the horizontal direction and can limit the position of the connection row 260 in the horizontal direction. The stopping part 145 is at a preset distance from the second substrate 141, which can prevent the connection row 260 from interfering with the inner wall of the cavity of the beam body 110 and prevent phenomena such as short circuit when the connection row 260 contacts the inner wall of the cavity of the beam body 110 after installation, that is, prevent the connection row 260 from contacting the first side surface 113.

[0042] Optionally, the insulating protection wings 146 are extended and provided on the slot wall of the limiting card slot 143. The insulating protection wings 146 are also for preventing the connection row 260 from contacting the beam body 110 and causing a short circuit. In this embodiment, the insulating protection wings 146 are arranged on the two opposite sides of the limiting card slot 143 in the height direction of the beam body 110, that is, protecting the connection row 260 in the up and down direction to prevent the connection row 260 from contacting the beam body 110, which can prevent the connection row 260 from contacting the top surface 111. At the same time, it can also avoid the fracture of the connection row 260 caused by stress concentration during installation and vibration during use. When an insulating layer 263 is arranged on the periphery of the connection row 260, the insulating protection wings 146 can abut against the insulating layer 263 to ensure overall insulation in the length direction of the connection row 260, and at the same time play a certain role in protecting and restricting the insulating layer 263 to avoid the insulating layer 263 from warping or being punctured.

[0043] Optionally, the second substrate 141 is provided with a fourth installation through hole 147, and the first side surface 113 is provided with a fifth installation through hole 114 opposite to the fourth installation through hole 147. By sequentially inserting the connecting piece 128 into the fourth installation through hole 147 and the fifth installation through hole 114, the fixed connection between the second support seat 140 and the beam body 110 can be realized. The connecting piece 128 includes but is not limited to screws, bolts, rivets, pins or plastic buckles, etc., which are not specifically limited here. Of course, the second support seat 140 and the beam body 110 can also be fixed by clamping, bonding, plugging or other connection methods.

[0044] It should be noted that a sixth mounting through-hole 148 is also provided on the second substrate 141. After the connection row 260 is fixed in the limit card slot 143, the end of the connection row 260 is located in the sixth mounting through-hole 148. Such a setting facilitates the connection between the connection row 260 and the external high-voltage busbar. Optionally, the cross-sectional size of the sixth mounting through-hole 148 can be designed according to the size and shape of the end of the connection row 260. The end of the connection row 260 extends out through the sixth mounting through-hole 148, that is, through the first side surface 113, which is convenient for connecting with the high-voltage busbar in the electrical compartment, avoiding occupying the space at the top of the crossbeam 100, and at the same time is beneficial to reducing the length of the high-voltage busbar and improving energy efficiency.

[0045] Optionally, both the first support base 120 and the second support base 140 in this embodiment are injection molded parts, which are convenient to install, have good insulation performance, and high structural strength.

[0046] Combined with Figure 1 and Figure 2 , an embodiment of the present invention further provides a box body 210, which includes a bottom plate 211, side plates 212 connected around the bottom plate 211, and the aforementioned crossbeam 100. The bottom plate 211 and the side plates 212 enclose a receiving groove. Both ends of the crossbeam 100 are respectively connected to a group of opposite side plates 212, and the crossbeam 100 divides the receiving groove into a first receiving groove 230 and a second receiving groove 240. Among them, the first receiving groove 230 serves as a battery compartment, and the second receiving groove 240 serves as an electrical compartment.

[0047] An embodiment of the present invention further provides a battery pack 200, which includes a battery 250, a connection row 260, and the aforementioned box body 210. The battery 250 is disposed in the first receiving groove 230, the battery 250 is electrically connected to the connection row 260, and the connection row 260 is disposed in the crossbeam 100. It can be understood that the beam body 110 includes a first side surface 113 and a second side surface that are oppositely arranged. Among them, the first side surface 113 of the beam body 110 faces the second receiving groove 240, and the second side surface faces the first receiving groove 230. The second support base 140 is arranged towards the electrical compartment, thereby shortening the overall high-voltage connection path.

[0048] Optionally, the battery 250 is provided with an output positive electrode and an output negative electrode. There are two connecting rows 260, one of the connecting rows 260 is electrically connected to the output positive electrode, and the other connecting row 260 is electrically connected to the output negative electrode. Both of the two connecting rows 260 are disposed in the accommodation cavity 115 of the cross beam 100. The output positive electrode of the battery 250 adopts a metal sheet 251, such as a copper sheet. Mounting holes are provided on the copper sheet, and the mounting holes are correspondingly arranged with the adjustment holes 264 on the connecting row 260 and the nuts 131 on the slider 130. By using fasteners 252 to sequentially pass through the metal sheet 251, the connecting row 260 and the slider 130, a fixed connection between the output positive electrode and the connecting row 260 is achieved. The fasteners 252 include but are not limited to bolts. Similarly, the output negative electrode of the battery 250 adopts a metal sheet 251, such as a copper sheet. The connection manner between the output negative electrode and the other first support seat 120 is the same as the connection manner between the output positive electrode and the first support seat 120.

[0049] The two first support seats 120 are respectively disposed on both sides of the second support seat 140. One ends of the two connecting rows 260 away from the first support seats 120 respectively extend from the inside of the beam body 110 to the second support seat 140 for electrically connecting to an external high-voltage busbar. In this embodiment, the connecting row 260 at the second support seat 140 is used for electrically connecting to the high-voltage busbar in the electrical compartment. It should be noted that two mounting portions 142 are provided on the second support seat 140 along the length direction of the beam body 110, and the limiting card slots 143 opened on the peripheral side walls of the two mounting portions 142 are relatively far away from each other, that is, the limiting card slots 143 are disposed on the relatively far away sides of the peripheral side walls, corresponding to the connecting rows 260 on both sides of the second support seat 140. With such a setting, the second support seat 140 can simultaneously connect two relatively arranged connecting rows 260, further improving the utilization space of the beam body 110, saving costs, and improving the installation efficiency.

[0050] Combined with Figure 9 and Figure 10, Optionally, each connection row 260 includes a main body portion and a first end portion 261 and a second end portion 262 connected to both ends of the main body portion. The first end portion 261 is provided with an adjustment hole 264 for connecting to the slider 130 on the first support base 120. The second end portion 262 is provided with a rivet nut 265, which is located in the sixth mounting through hole 148 of the second support base 140. The adjustment hole 264 is an oval hole, that is, the cross-section of the adjustment hole 264 is a round-headed rectangle. This can absorb the errors during the installation process and make the installation more convenient. The first end portion 261 is bent. Specifically, the first end portion 261 is bent upward along the plane of the main body portion. The second end portion 262 is bent. Specifically, the second end portion 262 is bent downward along the side surface of the main body portion. The first end portion 261 and the second end portion 262 are bent and extended on opposite sides of the main body portion, thereby shortening the length of the connection row 260. At the same time, the first end portion 261 can be exposed from the first mounting through hole 123, and the second end portion 262 can be exposed from the sixth mounting through hole 148, which is beneficial to the connection row 260 to connect the battery 250 and the electronic control unit respectively, improving the operation convenience.

[0051] In this embodiment, the connection row 260 is made of a copper row. The connection row 260 is made of red copper, which has good electrical conductivity. Optionally, the main body portion is coated with an insulating layer 263 to prevent the connection row 260 from contacting the beam body 110 and causing a short circuit. The insulating layer 263 can be heat-shrunk from an EVA insulating material.

[0052] The installation process of the battery pack 200 provided in this embodiment is as follows: Install the cross beam 100 into the box body 210, and both ends of the cross beam 100 are respectively connected to a group of opposite side plates 212. Pre-place the connection row 260 into the accommodation cavity of the beam body 110. First, install the second support base 140 on the first side surface 113 of the beam body 110, and the connection row 260 is snapped into the limit card slot 143. Then install the first support base 120 on the top surface 111 of the beam body. Before installing the first support base 120, first slide the slider 130 to one end, such as the end of the first mounting through hole 123 away from the second support base 140. After the first support base 120 is installed on the beam body 110, move the slider 130 to directly below the connection row 260. Then cover the output positive electrode and the output negative electrode of the battery 250 on the top surface 111 of the beam body 110 respectively, and align them with the positions of the connection rows 260 in the first support base 120. Finally, use bolts to fixedly connect the output positive electrode and the output negative electrode to the two connection rows 260 respectively to achieve an electrical connection relationship.

[0053] The entire installation process is simple, convenient to operate, and has high installation efficiency. It can be understood that the first support base 120 is cooperatively connected to the output positive electrode and the output negative electrode of the battery 250. Due to the setting of the slider 130 of the first support base 120 and the adjustment holes 264 provided on the connection row 260, position adjustment can be achieved, adapting to the high- and low-voltage assemblies of battery packs 200 of different models, with strong adaptability, high flexibility, and a wide range of usage scenarios. The high- and low-voltage assembly of the battery pack 200 includes a wire harness board, on which an FPC flexible circuit board, a bus bar, an output positive electrode, an output negative electrode, etc. are integrated.

[0054] The cross beam 100, the box body 210, and the battery pack 200 provided by the embodiments of the present invention have the following beneficial effects, including: In the cross beam 100 provided by the embodiment of the present invention, a first support base 120 and a second support base 140 are provided on the cross beam 100, and a connection row 260 can be integrated, that is, the layout problem of the high-voltage components of the battery pack 200 is solved. More space and layout flexibility are reserved for the layout of the low-voltage components, and the high- and low-voltage components are not easily crossed or interfered with, being safe and reliable. Moreover, the structure is compact, the installation is convenient, the space utilization rate is high, which is beneficial to improving the overall energy density of the battery pack 200. And the connection row 260 is arranged inside the beam body, further saving the space of the box body 210 of the battery pack 200, and can also play an electromagnetic shielding role to reduce EMC interference.

[0055] The box body 210 provided by the embodiment of the present invention includes the above-mentioned cross beam 100, with a compact structure, small volume, and high space utilization rate, which is beneficial to improving the overall energy density of the battery pack 200. Moreover, the layout of the high- and low-voltage components is not easily crossed or interfered with, being safe and reliable.

[0056] The battery pack 200 provided by the embodiment of the present invention includes the above-mentioned box body 210, with a compact structure, small volume, large overall energy density, and being safe and reliable.

[0057] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; any modifications, equivalent replacements, improvements, etc. should be included within the protection scope of the present invention.

Claims

1. A beam, characterized in that: include: A beam body (110), the beam body (110) comprising adjacent first side surfaces (113) and a top surface (111); a first support seat (120), the first support seat (120) comprising a first base (121) and a sliding block (130) slidably disposed on the first base (121); the first base (121) is disposed on the top surface (111); the sliding block (130) is used to connect to the connection row (260); A second support seat (140), the second support seat (140) is arranged on the first side surface (113), and the second support seat (140) is used to install an end of the connection row (260) away from the sliding block (130).

2. The crossbeam according to claim 1, characterized in that The beam body (110) is provided with a receiving cavity (115), and the first support seat (120) and the second support seat (140) are respectively at least partially disposed in the receiving cavity (115).

3. The crossbeam according to claim 2, characterized in that: The first base body (121) comprises a first substrate (122), a first wall body (125) and a second wall body (126) which are arranged opposite to each other, the first wall body (125) and the second wall body (126) being connected to the first substrate (122) respectively; the first substrate (122) is arranged parallel to the top surface (111), and the first wall body (125) and the second wall body (126) are arranged in the accommodating cavity (115); The first substrate (122) is provided with a first mounting through hole (123), and the sliding block (130) is arranged in the first mounting through hole (123) and can slide in the first mounting through hole (123).

4. The crossbeam according to claim 3, characterized in that: A guide rail (127) is provided on the first wall (125) and / or the second wall (126), and the sliding block (130) is movably mounted on the guide rail (127); And / or, the first substrate (122) is provided with a second mounting through hole (124), and the top surface (111) is provided with a third mounting through hole (112) arranged opposite to the second mounting through hole (124).

5. The crossbeam according to claim 2, characterized in that: The second support seat (140) comprises a second substrate (141) and a mounting portion (142) connected to the second substrate (141); the second substrate (141) and the first side surface (113) are arranged in parallel; the mounting portion (142) is located in the accommodating cavity (115); and the mounting portion (142) is used to mount the connection row (260).

6. The crossbeam according to claim 5, characterized in that The mounting portion (142) comprises a peripheral side wall protruding from the second substrate (141), the peripheral side wall being provided with a limit slot (143), one end of the limit slot (143) being provided with a guide portion (144), and the other end being provided with a stop portion (145), the limit slot (143) being used for mounting the connection row (260); And / or, an insulating protection wing (146) is extended from the groove wall of the limiting groove (143).

7. The crossbeam according to claim 5, characterized in that The second substrate (141) is provided with a fourth mounting through hole (147), and the first side surface (113) is provided with a fifth mounting through hole (114) arranged opposite to the fourth mounting through hole (147).

8. The crossbeam according to any one of claims 1 to 7, characterized in that The slider (130) is provided with a threaded hole, or the slider (130) is embedded with a nut (131).

9. A box, characterized in that: The invention comprises a bottom plate (211), a side plate (212) connected around the bottom plate (211), and a crossbeam according to any one of claims 1 to 8, wherein the bottom plate (211) and the side plate (212) enclose a receiving groove; two ends of the crossbeam are respectively connected to the side plate (212), and the crossbeam divides the receiving groove into a first receiving groove (230) and a second receiving groove (240).

10. A battery pack, characterized in that: Comprising a battery (250), a connection bar (260) and the box body according to claim 9, wherein the battery (250) is arranged in the first receiving groove (230), the battery (250) and the connection bar (260) are electrically connected, the connection bar (260) is arranged in the crossbeam, and the first side surface (113) of the beam body (110) faces the second receiving groove (240); The connecting row (260) comprises a main body, and a first end (261) and a second end (262) connected to both ends of the main body, the first end (261) being provided with an adjustment hole (264), and the second end (262) being provided with a rivet nut (265).

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