Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a battery module, a heat dissipation assembly and a shell, the battery module and the heat dissipation assembly are both arranged in the shell, the heat dissipation assembly is located on the side face of the battery module, and a heat dissipation opening is formed in the position, corresponding to the heat dissipation assembly, of a side plate of the shell. The problem of local overheating caused by poor heat dissipation effect of the battery pack is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack. BACKGROUND

[0002] Battery pack as commonly used energy storage product, in the process of accompanying charging or discharging, battery pack itself can produce certain heat, to avoid the heat causes the overheating of battery pack, usually set up heat dissipation assembly, such as fan, in the end of battery module, fan blows to the outside to carry out heat dissipation.

[0003] Therefore, the fan of the end of electromagnetic module is difficult to take away the heat of the middle of battery module, and the battery module is prone to local overheating. SUMMARY

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides a battery pack to solve the problem of local overheating caused by poor heat dissipation effect of battery pack.

[0005] The utility model discloses a technical scheme that solves the problem:

[0006] A battery pack, comprising a battery module, a heat dissipation assembly and a shell.

[0007] The battery module and the heat dissipation assembly are arranged in the shell, and the heat dissipation assembly is located on the side of the battery module, and the side plate of the shell is provided with a heat dissipation opening corresponding to the position of the heat dissipation assembly.

[0008] Further, the end plate at one end of the shell is provided with a positive terminal post and a negative terminal post.

[0009] One end of the positive terminal post and the negative terminal post is connected to the battery module, and the other end extends out of the end plate.

[0010] Further, the heat dissipation assembly comprises a plurality of fans arranged along the length direction of the battery module.

[0011] Further, the heat dissipation opening comprises a plurality of heat dissipation holes, and the plurality of heat dissipation holes and the plurality of fans are arranged one by one.

[0012] Further, a plurality of partition strips are arranged in the heat dissipation holes.

[0013] Further, the plurality of partition strips are a plurality of circular rings with different diameters and at least one straight strip for connecting the plurality of circular rings.

[0014] The straight bar connects the plurality of annular rings through connection into one body, and the plurality of annular rings are located in the heat dissipation holes.

[0015] Further, the battery module has and only one side provided with the heat dissipation assembly, and the shell is provided with a convection hole on the side plate of the side of the battery module away from the heat dissipation assembly.

[0016] Further, the battery module has and only one side provided with the heat dissipation assembly, and the shell is provided with a convection hole on the side plate of the side of the battery module away from the heat dissipation assembly.

[0017] Further, the battery module has and only one side provided with the heat dissipation assembly, and the shell is provided with a convection hole on the side plate of the side of the battery module away from the heat dissipation assembly.

[0018] In summary, the battery pack has the following technical effects:

[0019] The heat dissipation assembly is arranged on the side surface of the battery module, so that:

[0020] 1) The heat dissipation assembly is arranged on the side surface of the battery module, and compared with the heat dissipation assembly arranged on the end portion of the battery module, the heat dissipation assembly arranged on the side surface of the battery module has a shorter straight line distance from the center of the battery module, and the heat dissipation assembly arranged on the side surface of the battery module has a more balanced straight line distance from each point of the battery module, so that the balance of the heat dissipation of the battery module is beneficial, and the problem of difficult heat dissipation in the middle part is not prone to occur.

[0021] 2) The heat dissipation port on the shell is also transferred from the previous end portion to the side plate, so that the accommodation space on one end plate can be used for integrated installation of all external components of the battery pack, and the end plate does not need to be replaced during installation of the external components, the installation efficiency of the external components is improved, and in addition, all the external components are arranged on one end plate, so that the single direction of the connection wiring direction of the external components and the battery module is limited, that is, all the lines of the battery module connected with the external components have only one direction, and the wiring difficulty is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is one of the structural schematic diagrams of the utility model embodiment;

[0023] Figure 2 It is another structural schematic diagram of the utility model embodiment;

[0024] Figure 3 It is an explosion schematic diagram of the utility model embodiment.

[0025] Among them, the reference signs are:

[0026] 10, battery module; 20, heat dissipation assembly; 30, shell; 31, lower shell; 32, cover; 40, heat dissipation opening; 41, blocking strip; 50, positive electrode terminal post; 60, negative electrode terminal post; 70, convection hole; 80, external terminal. DETAILED DESCRIPTION

[0027] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0028] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0030] Referring to Figure 1 , Figure 2 and Figure 3 , the present application discloses a battery pack, comprising a battery module 10, a heat dissipation assembly 20 and a shell 30. The battery module 10 and the heat dissipation assembly 20 are both arranged in the shell 30, and the heat dissipation assembly 20 is located on the side of the battery module 10, and the side plate of the shell 30 is provided with a heat dissipation opening 40 corresponding to the position of the heat dissipation assembly 20.

[0031] Among them, the present embodiment takes the shell 30 of cuboid structure as an example, it can be known that the shell 30 includes a lower shell 31 and a cover 32, the battery module 10 is arranged in the lower shell 31 and covered by the cover 32; the plate arranged on the side of the battery module 10 along the length direction of the lower shell 31 is a side plate, and it can be known by analogy that the plate arranged on the end surface of the battery module 10 along the width direction of the lower shell 31 is an end plate.

[0032] The battery module 10 is composed of a plurality of battery monomers in series, and one battery pack can include a plurality of battery modules 10, each battery module can be used to power the electric equipment independently, or can be connected in series or parallel to power the electric equipment.

[0033] The embodiment focuses on that the heat dissipation assembly 20 is arranged in the shell 30 and located at the side of the battery module 10. It can be known that the battery module 10 is also arranged along the direction of the lower shell 31 in the lower shell 31, so that the end (positive / negative end) of the battery module 10 is arranged close to the end plate. In the embodiment, the heat dissipation assembly 20 is located at the side of the battery module 10, preferably, the heat dissipation assembly 20 is arranged at the center position of the side of the battery module 10.

[0034] In the above, the heat dissipation assembly 20 is arranged at the side of the battery module 10. First, in terms of position, the heat dissipation assembly 20 located at the side of the battery module 10 has a shorter straight-line distance to the center of the battery module 10 than the heat dissipation assembly 20 located at the end of the battery module 10, and the heat dissipation assembly 20 located at the side of the battery module 10 has a more balanced straight-line distance to each point of the battery module 10. Therefore, it is beneficial to the balance of the heat dissipation of the battery module 10, and the problem of difficult heat dissipation in the middle part is not easy to occur.

[0035] Optionally, the end plate at one end of the shell 30 is provided with a positive terminal post 50 and a negative terminal post 60; one end of the positive terminal post 50 is connected to the battery module 10, and the other end extends out of the end plate; one end of the negative terminal post 60 is connected to the battery module 10, and the other end extends out of the end plate.

[0036] Among them, the positive terminal post 50 and the negative terminal post 60 are arranged on the end plate, and the two are respectively electrically connected with the battery module 10, which is all prior art and will not be repeated here. The important content of the embodiment is that the above-mentioned positive terminal post 50 and the negative terminal post 60 are arranged on the same end plate. For the convenience of description, the positive terminal post 50 and the negative terminal post 60 are classified as external components, so that more external components are integrated on one end plate. It should be noted that, based on the above-mentioned arrangement of the heat dissipation assembly 20 at the side of the battery module 10, the heat dissipation port 40 is correspondingly transferred to the side plate of the lower shell 31, thereby leaving more mounting positions for arranging external components on the end plate. The above-mentioned external components are arranged on the same end plate in the embodiment, and the technical effects brought by this arrangement include: first, the accommodation space on the same end plate can be used to integrate and install all external components of the battery pack, and the external component installation process does not need to change the end plate, thereby improving the installation efficiency of the external components; second, all external components are arranged on one end plate, which limits the single direction of the connection wiring direction between the external components and the battery module 10, that is, all lines connected with the external components of the battery module have only one direction, which greatly reduces the difficulty of wiring.

[0037] In addition, other external components, such as a screen for displaying battery module 10 data, an indicator light for detecting the working state of the battery module 10, can also be arranged on the same end plate as the positive terminal post 50 and the negative terminal post 60.

[0038] Further, to protect the positive terminal post 50 and the negative terminal post 60 from extending to the outside of the end plate, a protective cap can be provided on the outer end of the positive terminal post 50 and the negative terminal post 60.

[0039] Optionally, the heat dissipation assembly 20 includes a plurality of fans arranged along the length direction of the battery module 10.

[0040] Among them, the plurality of fans are arranged from the middle to both ends of the battery module 10, and similarly, the plurality of heat dissipation openings 40 are also arranged from the middle to both ends of the side plate. In the case of an even number of heat dissipation openings 40, the even number of heat dissipation openings 40 are symmetrically arranged about the center line in the height direction of the side plate, with half of the heat dissipation openings 40 arranged on each side of the center line. If the number of heat dissipation openings 40 is odd (more than one), the median heat dissipation opening 40 is arranged with its center on the center line, and the remaining heat dissipation openings 40 are evenly arranged on both sides of the median heat dissipation opening 40.

[0041] Of course, it needs to be emphasized that the above-mentioned one-to-one corresponding alignment relationship between the heat dissipation openings 40 and the fans, after the battery module 10 is installed into the lower shell 31, the center line in the height direction of the side of the battery module 10 is coplanar with the two symmetry lines of the two side plates of the lower shell 31, and then the plurality of fans are also symmetrically arranged about the center line in the height direction of the side of the battery module 10, and the plurality of fans and the plurality of heat dissipation openings 40 are thus one-to-one corresponding. In addition, the spacing between each fan is uniform.

[0042] The above-mentioned statement that the center line of each heat dissipation opening 40 or each fan is symmetrically arranged is to prioritize heat dissipation in the middle of the battery module 10, solving the problem of difficult heat dissipation in the middle of the conventional battery module 10.

[0043] In addition, the heat dissipation assembly 20 is usually connected to an external power source through an external terminal 80, and the external terminal 80 can be arranged on the same end plate as the positive terminal post 50 and the negative terminal post 60.

[0044] Optionally, a plurality of partition strips 41 are arranged in the heat dissipation holes.

[0045] The heat dissipation holes can be of any shape, and the barrier strips 41 can be straight strips arranged in the heat dissipation holes. The arrangement angle and the interval between two adjacent straight strips can be set as required, which will not be repeated here. In addition, when the heat dissipation holes are circular holes, a plurality of barrier strips 41 can be a plurality of circular rings with different diameters. The plurality of circular rings are concentrically arranged from small to large in diameter, and the plurality of circular rings are connected by one or more straight strips to form a circular overall contour. The overall contour can be arranged in the circular heat dissipation holes. For example, two straight strips are arranged in a cross shape, and a plurality of circular rings are connected to the two straight strips, respectively. The ends of the two straight strips are connected to the edges of the heat dissipation holes, respectively.

[0046] Optionally, the battery module 10 has and only one side provided with the heat dissipation assembly 20, and the housing 30 is provided with the convection hole 70 on the side plate of the side of the battery module 10 away from the heat dissipation assembly 20.

[0047] It can be understood that if the lower shell 31 is provided with the heat dissipation hole on one side, when the fan blows outward, a negative pressure can be formed in the inside of the housing 30, which is not conducive to the formation of convection and reduces the heat dissipation efficiency. The opposite side of the present embodiment is provided with the convection hole 70, which solves the problem of poor convection.

[0048] For example, the convection hole 70 can be provided in the form of a small hole with multiple holes.

[0049] Optionally, the battery module 10 is provided with the heat dissipation assembly 20 on both sides.

[0050] It can be understood that the more the number of heat dissipation assemblies 20, the greater the heat dissipation rate, and correspondingly, the heat dissipation holes are arranged on the two opposite side plates of the lower shell 31 according to the number of fans included in the heat dissipation assembly 20 on one side.

[0051] Further, the positional relationship between the two groups of heat dissipation assemblies 20 can be symmetrically arranged or staggered. Taking the example that each group of heat dissipation assemblies 20 includes three fans, the symmetrically arranged is explained as: the three fans of the two groups of heat dissipation assemblies 20 are symmetrically arranged about the center line of the length direction of the battery module 10. The staggered arrangement is explained as: the three fans of one group of heat dissipation assemblies 20 are the reference group, the reference group has an installation gap between the two adjacent fans, and the three fans correspond to the two installation gaps. The three fans of the other group are the opposite group, and after the installation of the three fans of the opposite group, the projection of the three fans of the opposite group on the width direction of the battery module 10 is aligned with the two installation gaps one by one, and the last fan of the opposite group is located on the outside of one of the fans of the reference group. In this way, the staggered arrangement is formed.

[0052] In summary, in the symmetric arrangement, the blowing directions of the two symmetric fans are opposite, and a strong convection is formed between the two, improving the air outlet speed.

[0053] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. A battery pack, characterized by, The battery module (10), the heat dissipation assembly (20) and the shell (30) are included. The battery module (10) and the heat dissipation assembly (20) are arranged in the shell (30), and the heat dissipation assembly (20) is located at the side of the battery module (10), and the side plate of the shell (30) is provided with a heat dissipation opening (40) corresponding to the position of the heat dissipation assembly (20).

2. The battery pack of claim 1, wherein, The end plate of one end of the shell (30) is provided with a positive terminal post (50) and a negative terminal post (60). The positive terminal post (50) and the negative terminal post (60) are respectively connected to the battery module (10) at one end and extended to the outside of the end plate at the other end.

3. The battery pack of claim 1 or 2, wherein, The heat dissipation assembly (20) includes a plurality of fans arranged along the length direction of the battery module (10).

4. The battery pack of claim 3, wherein, The heat dissipation opening (40) includes a plurality of heat dissipation holes, and the plurality of heat dissipation holes and the plurality of fans are arranged one by one.

5. The battery pack of claim 4, wherein, A plurality of the barrier strips (41) are arranged in the heat dissipation holes.

6. The battery pack of claim 5, wherein, The plurality of barrier strips (41) are a plurality of circular rings with different diameters and at least one straight strip for connecting the plurality of circular rings. The straight strip connects the plurality of circular rings into one body, the plurality of circular rings are located in the heat dissipation holes, and the two ends of the straight strip are respectively connected to the edges of the heat dissipation holes.

7. The battery pack of claim 1, 2, 4, 5, or 6, wherein, The battery module (10) has and only one side provided with the heat dissipation assembly (20), and the shell (30) is provided with a convection hole (70) on the side plate of the side of the battery module (10) away from the heat dissipation assembly (20).

8. The battery pack of claim 1, 2, 4, 5, or 6, wherein, The battery module (10) is provided with the heat dissipation assembly (20) on both sides.

9. The battery pack of claim 8, wherein, The two side plates of the shell (30) located on both sides of the battery module (10) are provided with the heat dissipation opening (40).

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