Battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack. The battery pack includes: a case; the at least one reinforcing beam is arranged in the box body; the interior of the box body is divided into a plurality of accommodating spaces by the reinforcing beams; the side face, close to the containing space, of the reinforcing beam is of a wave-shaped structure. The wave-shaped structure is matched with the cylindrical circumferential surface of the cylindrical battery; a plurality of battery rows are placed in the accommodating space; the battery row is formed by arranging a plurality of cylindrical batteries along the same direction; and the extension direction of the battery row is the same as the extension direction of the reinforcing beam. According to the embodiment, the reinforcing beam and the side face, close to the containing space, of the reinforcing beam are of the wave-shaped structure, the wave-shaped structure is matched with the cylindrical circumferential face of the battery row, and therefore the battery row can be directly placed in the position, close to the reinforcing beam, of the containing space, and compared with a reinforcing beam with a rectangular plate face, the space utilization rate can be obviously increased; and the overall energy density of the battery pack can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a battery pack. BACKGROUND

[0002] At present, in order to ensure the structural strength of battery pack, reinforcing beam is usually arranged in the inside of battery pack, and the reinforcing beam is provided with a middle lifting point for hoisting the battery pack. In actual use, since the reinforcing beam is usually rectangular plate structure, the inside of the battery pack is divided into multiple regular rectangular spaces. Under normal circumstances, the traditional square battery can be placed in the rectangular space, and the rectangular space does not limit the direction of the battery.

[0003] However, when the cylindrical battery is installed in the battery pack, the space between the reinforcing beam and the cylindrical battery is wasted due to the insufficient size to accommodate a single cylindrical battery, thereby reducing the space utilization. Moreover, the more reinforcing beams, the more rectangular spaces are divided, and the lower the space utilization. SUMMARY

[0004] Therefore, the utility model provides a battery pack to solve the problem of low space utilization caused by the reinforcing beam arranged in the battery pack.

[0005] In a first aspect, the utility model provides a battery pack, which comprises:

[0006] a box body;

[0007] at least one reinforcing beam arranged in the box body; the reinforcing beam divides the inside of the box body into multiple accommodation spaces; the side surface of the reinforcing beam close to the accommodation space is in a wave shape structure; and the wave shape structure cooperates with the cylindrical surface of the cylindrical battery.

[0008] a plurality of battery rows are placed in the accommodation space; and the battery rows are arranged in the same direction by a plurality of cylindrical batteries.

[0009] Advantages: the reinforcing beam and the wave shape structure close to the side surface of the accommodation space in the embodiment can make the wave shape structure cooperate with the cylindrical surface of the battery row, so that the position close to the reinforcing beam of the accommodation space can directly place the battery row. Compared with the reinforcing beam in the rectangular plate surface, the space utilization can be obviously improved, and the overall energy density of the battery pack can be improved. At the same time, compared with the reinforcing beam in the rectangular plate surface, the wave shape structure of the reinforcing beam has greater structural strength, and can further improve the rigidity and strength of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the related art, the accompanying drawings needed to be used in the description of the specific embodiments or the related art will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0011] Figure 1 The internal structure schematic diagram of the battery pack in the embodiment of the present application is shown in Figure 1.

[0012] Figure 2 The internal structure schematic diagram of the battery pack in the embodiment of the present application is shown in Figure 1. Figure 1 The local enlarged schematic diagram of the A in Figure 1 is shown in Figure 2.

[0013] Figure 3 The local enlarged schematic diagram of the B in Figure 1 is shown in Figure 3. Figure 1

[0014] Figure 4 The structure schematic diagram of the reinforcing beam in the embodiment of the present application is shown in Figure 4.

[0015] Figure 5 The local enlarged schematic diagram of the C in Figure 1 is shown in Figure 5. Figure 4

[0016] The structure schematic diagram of the liquid cooling plate in the embodiment of the present application is shown in Figure 6. Figure 6 Explanation of reference signs:

[0017] 1, box; 2, reinforcing beam; 21, hoisting piece; 22, accommodating groove; 23, reinforcing plate; 24, mounting hole; 25, via hole; 26, connecting piece; 3, battery row; 4, liquid cooling assembly; 41, liquid cooling pipe; 42, liquid cooling plate.

[0018] Specific embodiments In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] ​In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0023] At present, in order to ensure the structural strength of the battery pack, the reinforcing beam 2 is usually arranged in the battery pack, and the middle lifting point for lifting the battery pack is arranged on the reinforcing beam 2. In the actual use process, since the reinforcing beam 2 is usually a rectangular plate structure, the battery pack is divided into multiple regular rectangular spaces. Under normal circumstances, the traditional square battery can be placed in the rectangular space, and the rectangular space does not limit the direction of the battery.

[0024] However, when the cylindrical battery is installed in the battery pack, the space between the reinforcing beam 2 and the cylindrical battery is wasted due to the insufficient size to accommodate a single cylindrical battery, thereby reducing the space utilization. Moreover, the more reinforcing beams 2, the more rectangular spaces are divided, and the lower the space utilization.

[0025] Therefore, the utility model provides a battery pack to solve the problem of low space utilization caused by the reinforcing beam 2 arranged in the battery pack.

[0026] The embodiments of the utility model are described below in combination with Figures 1 to 6 .

[0027] According to the embodiment of the utility model, on the one hand, a battery pack is provided, the battery pack comprises a box body 1, a reinforcing beam 2 and a plurality of battery rows 3.

[0028] In the embodiment, the box body 1 is in a rectangular structure and is internally provided with cavities for placing the battery rows 3. The reinforcing beam 2 is installed inside the box body 1, and the number of the reinforcing beam 2 is not limited by those skilled in the art and can be adjusted according to actual conditions.

[0029] Further, in the embodiment, at least one reinforcing beam 2 is provided, which divides the inside of the box body 1 into a plurality of containing spaces. For example, when one reinforcing beam 2 is provided inside the box body 1, the box body 1 can be directly divided into two containing spaces. When subjected to external impact or pressure, the impact force can be dispersed and absorbed due to the division of the inside of the box body 1 into a plurality of containing spaces by the reinforcing beam 2. Moreover, each containing space can independently place the battery row 3 according to actual requirements and actual space. This design makes the space utilization inside the battery pack more reasonable and can accommodate more batteries, thereby improving the energy density.

[0030] Further, in the embodiment, the side of the reinforcing beam 2 close to the containing space is in a wave-shaped structure, which cooperates with the cylindrical surface of the cylindrical battery. In this way, when the cylindrical battery is placed into the containing space close to the reinforcing beam 2, the cylindrical battery can be directly embedded into the groove of the wave-shaped structure, so that there is no additional gap between the cylindrical battery and the reinforcing beam 2.

[0031] Further, in the embodiment, a plurality of battery rows 3 are placed in the containing space, and the battery rows 3 are arranged in the same direction by a plurality of cylindrical batteries. Specifically, the extension directions of the battery row 3 and the reinforcing beam 2 can be the same or different. As shown in the battery row 3 in the left virtual frame, when the extension directions of the battery row 3 and the reinforcing beam 2 are the same, for example, the battery row 3 is arranged in the longitudinal direction, the reinforcing beam 2 is also arranged in the longitudinal direction, in this way, the battery row 3 can be embedded into the groove of the wave-shaped structure. As shown in the battery row 3 in the right virtual frame, when the extension directions of the battery row 3 and the reinforcing beam 2 are different, there is an included angle between the extension directions of the battery row 3 and the reinforcing beam 2, and it should be noted that at this time, only the last cylindrical battery in each battery row 3 needs to be embedded into the groove of the wave-shaped structure. In this way, the number of cylindrical batteries in each battery row 3 is also different. Figure 1 Figure 1 Further, in the embodiment, a plurality of battery rows 3 are placed in the containing space, and the battery rows 3 are arranged in the same direction by a plurality of cylindrical batteries. Specifically, the extension directions of the battery row 3 and the reinforcing beam 2 can be the same or different. As shown in the battery row 3 in the left virtual frame, when the extension directions of the battery row 3 and the reinforcing beam 2 are the same, for example, the battery row 3 is arranged in the longitudinal direction, the reinforcing beam 2 is also arranged in the longitudinal direction, in this way, the battery row 3 can be embedded into the groove of the wave-shaped structure. As shown in the battery row 3 in the right virtual frame, when the extension directions of the battery row 3 and the reinforcing beam 2 are different, there is an included angle between the extension directions of the battery row 3 and the reinforcing beam 2, and it should be noted that at this time, only the last cylindrical battery in each battery row 3 needs to be embedded into the groove of the wave-shaped structure. In this way, the number of cylindrical batteries in each battery row 3 is also different.

[0032] Moreover, the installation directions of each structural beam can be the same or different, and only the cylindrical battery in the battery row 3 needs to be embedded into the groove of the wave-shaped structure.

[0033] ​The reinforcing beam 2 in this embodiment is in a wavy structure near the side of the accommodating space, which is matched with the cylindrical surface of the battery row 3, so that the position of the accommodating space near the reinforcing beam 2 can directly place the battery row 3, compared with the reinforcing beam 2 with a rectangular plate surface, the space utilization can be obviously improved, and the overall energy density of the battery pack can be improved. At the same time, compared with the reinforcing beam 2 with a rectangular plate surface, the reinforcing beam 2 with a wavy structure can further increase the rigidity and stability of the structure. The wavy structure can better disperse stress and reduce local deformation when stressed. Therefore, the structural strength is greater, and the rigidity and strength of the battery pack itself can be further improved.

[0034] Further, in an optional embodiment, the width of the reinforcing beam 2 is D, and the width of the battery row 3 is E, D is an integer multiple of E. That is, the reinforcing beam 2 does not occupy more space in the box 1, and only the space of a single or multiple battery rows 3 is used for the reinforcing beam 2, so that the structural strength of the battery pack is improved without occupying additional space. And the width of the reinforcing beam 2 can be adjusted according to the actual situation to ensure that the structural strength of the battery pack meets the design standard.

[0035] Further, in an optional embodiment, a plurality of lifting members 21 are arranged on the reinforcing beam 2, and the lifting members 21 are connected with the bottom of the box 1 through fixing members. For example, in this embodiment, the lifting member 21 can be composed of a lifting stud, a lifting bolt and a lifting hole, the lifting hole can be arranged on the reinforcing beam 2, the bottom of the box 1 is provided with a lifting stud corresponding to the lifting hole, the lifting stud extends upward into the lifting hole, and then the lifting bolt is inserted into the lifting hole and screwed with the lifting stud. Of course, the lifting member 21 can also be integrally arranged with the reinforcing beam 2, or the lifting member 21 can be arranged as a single piece and directly installed with the bottom of the box 1.

[0036] Of course, this embodiment only exemplifies the installation method of the lifting member 21 and the specific structure of the lifting member 21, but does not limit it, and those skilled in the art can change it according to the actual situation, which can achieve the same technical effect.

[0037] Further, in an optional embodiment, along the length direction of the reinforcing beam 2, an accommodating groove 22 is arranged between adjacent two lifting members 21, and the accommodating groove 22 is filled with pouring sealant.

[0038] In this way, the accommodating groove 22 can provide additional structural support for the reinforcing beam 2, making the reinforcing beam 2 more stable. After filling the potting glue in the accommodating groove 22, the potting glue can fill the gaps in the accommodating groove 22, increasing the rigidity and stability of the structure. The cured potting glue can form a firm connection, and to some extent, the cured potting glue can prevent the reinforcing beam 2 from displacement or deformation when subjected to external impact.

[0039] In addition, the potting glue has good sealing performance and can also prevent moisture, dust and other impurities from entering the inside of the battery pack, protecting the battery from the influence of the external environment. At the same time, the potting glue has a certain elasticity after curing, which can absorb and buffer vibration and reduce damage to the battery caused by vibration during transportation and use.

[0040] Further, in an optional embodiment, a plurality of reinforcing plates 23 are arranged in the accommodating groove 22, as shown in FIG. 4. Figure 5 The reinforcing plate 23 extends along the length direction of the reinforcing beam 2, and a plurality of reinforcing plates 23 are arranged in sequence along the length direction of the reinforcing beam 2, and a spacing is arranged between adjacent two reinforcing plates 23.

[0041] In the present embodiment, the reinforcing plate 23 can be in a rectangular structure, an isosceles trapezoidal structure, or a right trapezoidal structure. Of course, the present embodiment only exemplifies the structure type of the reinforcing plate 23, but it is not limited thereto, and those skilled in the art can make changes according to the actual situation, as long as the same technical effects can be achieved.

[0042] In this way, the reinforcing plate 23 can significantly increase the structural strength of the accommodating groove 22, making it more solid. Moreover, the combination of the reinforcing beam 2, the accommodating groove 22 and the reinforcing plate 23 forms a multi-layer reinforcing structure, which can better disperse and absorb energy when subjected to external impact, reducing the deformation and damage of the structure. The combination of the reinforcing plate 23 and the potting glue can provide better elastic buffering effect. When the battery pack is subjected to vibration or impact, the reinforcing plate 23 can play a supporting role, while the potting glue can absorb and buffer vibration, reducing the impact on the battery.

[0043] It should be noted that when the reinforcing plate 23 and the reinforcing beam 2 are made of heat-conducting materials, and the potting glue is made of heat-conducting glue, the reinforcing beam 2 as a whole can serve as a heat-conducting path to help conduct the heat generated by the battery to the reinforcing beam 2 and the box 1 outside, further improving the heat dissipation efficiency. At the same time, the spaced arrangement of the plurality of reinforcing plates 23 can ensure that the heat is evenly distributed in the accommodating groove 22, avoiding local overheating and improving the overall heat dissipation performance of the battery.

[0044] Further, in an alternative embodiment, a mounting hole 24 is formed between two adjacent reinforcing plates 23, and a mounting member connects the reinforcing plates 23 and the box 1 through the mounting hole 24.

[0045] Further, the mounting member and the box 1 can be fixedly connected or detachably connected. For fixed connection, welding or bonding can be used. For detachable connection, screw holes can be used, or buckling and slot can be used, or magnetic pieces can be used.

[0046] The detachable connection is described below. For example, a fixed plate can be additionally provided at the bottom of the box 1, and the number of the fixed plate can be changed by those skilled in the art according to actual conditions, such as one, two, three, four, etc. Screw holes are formed in the fixed plate, and another screw hole is formed in the mounting member corresponding to the screw hole. Then, the screws are sequentially inserted through the screw holes in the fixed plate and the mounting member, thereby connecting the box 1 and the mounting member. Further, when buckling and slot are used for fixing, buckles can be additionally provided on the box 1, and the number of the buckles can be changed by those skilled in the art according to actual conditions, such as one, two, three, four, etc. A slot that can work with the buckle is formed in the mounting member corresponding to the buckle. Then, the buckle on the box 1 is directly inserted into the slot on the mounting member, thereby connecting the box 1 and the mounting member. When magnetic attraction is used for fixing, magnetic pieces can be additionally provided on the box 1, and the number of the magnetic pieces can be changed by those skilled in the art according to actual conditions, such as one, two, three, four, etc. A magnetic piece that can attract the magnetic piece is formed in the mounting member corresponding to the magnetic piece. Then, the magnetic piece on the box 1 is directly inserted into the magnetic piece on the mounting member, thereby magnetically connecting the box 1 and the mounting member.

[0047] Of course, the embodiments are only examples of fixed connection and detachable connection, but are not limited thereto. Those skilled in the art can change them according to actual conditions, as long as the same technical effects can be achieved.

[0048] Further, in an alternative embodiment, the battery pack further comprises a liquid cooling assembly 4, which is arranged in the box 1. The liquid cooling assembly 4 is provided with a liquid cooling pipe 41 and a plurality of liquid cooling plates 42 connected with the liquid cooling pipe 41. Corresponding two liquid cooling plates 42 form a containing cavity containing a single battery row 3.

[0049] Further, in an alternative embodiment, the liquid cooling plate 42 is arranged on the side of the battery row 3, and the liquid cooling plate 42 is in the wavy structure, so that the liquid cooling plate 42 is fitted to the cylindrical surface of the battery row 3. At the same time, the liquid cooling plate 42 is arranged in parallel with the reinforcing beam 2, so that the liquid cooling plate 42 extends in the same direction as the reinforcing beam 2. In this way, the liquid cooling plate 42 closest to the reinforcing beam 2 can be closely fitted to the reinforcing beam 2.

[0050] In this way, the wavy structure is fitted to the cylindrical surface of the battery row 3, which can increase the contact area between the battery row 3 and the liquid cooling plate 42, and is conducive to heat conduction and dissipation. This helps to keep the temperature of the battery stable during operation and prolong the service life of the battery.

[0051] Further, in an alternative embodiment, the reinforcing beam 2 is provided with a through hole 25 at the end close to the liquid cooling pipe 41, and the through hole 25 is adapted for the liquid cooling pipe 41 to pass through.

[0052] Generally, the liquid cooling plate 42 will be directly in contact with the cylindrical surface of the battery row 3. When the arrangement direction of the liquid cooling plate 42 is different from or intersects with the arrangement direction of the reinforcing beam 2, the liquid cooling plate 42 will be interrupted by the arrangement of the reinforcing beam 2, so the number of liquid cooling plates 42 and the number of pipe joints need to be increased. In the present application, since the arrangement direction of the liquid cooling plate 42 is the same as the arrangement direction of the battery row 3, the reinforcing beam 2 will not interrupt the liquid cooling plate 42 in a single containing space. At the same time, the liquid cooling pipe 41 is arranged in the present embodiment, and the through hole 25 is adapted for the liquid cooling pipe 41 to pass through. The liquid cooling pipe 41 can directly pass through the reinforcing beam 2 from one containing space to another containing space without the need to add a liquid cooling pipe 41 path or interrupt the liquid cooling pipe 41 path. Moreover, the reinforcing beam 2 can be adjusted in position on the liquid cooling pipe 41 when the reinforcing beam 2 is installed, so the position of the reinforcing beam 2 can be flexibly changed.

[0053] Further, in an alternative embodiment, the reinforcing beam 2 is provided with a connecting piece 26 at the end close to the box 1, and the connecting piece 26 is detachably connected with the box 1.

[0054] Further, the reinforcing beam 2 and the box 1 can be fixedly connected or detachably connected. For fixed connection, welding, bonding and the like can be used. For detachable connection, screw holes can be used for fixation, buckles and slots can be used for fixation, and magnetic pieces can be used for fixation.

[0055] Of course, the embodiment only illustrates the fixed connection mode and the detachable connection mode, but is not limited thereto, and those skilled in the art can change according to actual conditions, and as long as the same technical effects can be achieved.

[0056] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: Box (1); At least one reinforcing beam (2) is provided in the box body (1); The reinforcing beam (2) divides the interior of the box (1) into multiple accommodating spaces; the side of the reinforcing beam (2) near the accommodating space has a wave-shaped structure; the wave-shaped structure matches the cylindrical circumference of the cylindrical battery; The accommodating space contains multiple battery packs (3); the battery packs (3) are composed of multiple cylindrical batteries arranged in the same direction.

2. The battery pack according to claim 1, characterized in that, The width of the reinforcing beam (2) is D, and the width of the battery pack (3) is E, where D is an integer multiple of E.

3. The battery pack according to claim 2, characterized in that, The reinforcing beam (2) is provided with a plurality of lifting components (21), which are connected to the bottom of the box body (1) by means of fixing components.

4. The battery pack according to claim 3, characterized in that, Along the length of the reinforcing beam (2), a receiving groove (22) is provided between two adjacent lifting components (21), and the receiving groove (22) is filled with potting compound.

5. The battery pack according to claim 4, characterized in that, The receiving groove (22) is provided with a plurality of reinforcing plates (23), which are spaced apart along the length of the reinforcing beam (2).

6. The battery pack according to claim 5, characterized in that, An installation hole (24) is provided between two adjacent reinforcing plates (23), and the mounting component connects the reinforcing plate (23) and the box body (1) through the installation hole (24).

7. The battery pack according to any one of claims 1 to 6, characterized in that, The battery pack also includes: A liquid cooling assembly (4) is disposed in the housing (1); the liquid cooling assembly (4) is provided with a liquid cooling pipe (41) and a plurality of liquid cooling plates (42) connected to the liquid cooling pipe (41), and the two corresponding liquid cooling plates (42) surround each other to form a receiving cavity for accommodating a single battery pack (3).

8. The battery pack according to claim 7, characterized in that, The liquid cooling plate (42) is disposed on the side of the battery pack (3), and the liquid cooling plate (42) has a wave-shaped structure, so that the liquid cooling plate (42) is in contact with the cylindrical circumference of the battery pack (3); and the liquid cooling plate (42) is disposed parallel to the reinforcing beam (2), so that the liquid cooling plate (42) and the reinforcing beam (2) extend in the same direction, and the liquid cooling plate (42) closest to the reinforcing beam (2) is in contact with the reinforcing beam (2).

9. The battery pack according to claim 8, characterized in that, The reinforcing beam (2) has a through hole (25) at its end near the liquid cooling pipe (41), the through hole (25) being adapted for the liquid cooling pipe (41) to pass through.

10. The battery pack according to claim 9, characterized in that, The reinforcing beam (2) has a connector (26) at its end near the box body (1), and the connector (26) is detachably connected to the box body (1).

Images