Air-cooled battery pack

Abstract

The utility model discloses an air-cooled battery pack, and belongs to the technical field of batteries. The air-cooled battery pack comprises a box shell, a battery module and a battery management unit, the battery management unit is located above the battery module, and a collection wire harness of the battery module extends out of the upper end of the battery module and is connected with the battery management unit, so that the length of the collection wire harness between the battery module and the battery management unit can be shortened, wire harness disorder is avoided, and the service life of the battery module is prolonged. The wire harness is located in the box shell, the aging rate of the wire harness can be delayed, and the service life of the wire harness is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to an air-cooled battery pack. Background Art

[0002] The air-cooled battery pack includes a box shell, a battery module, a battery management unit, and a fan. Among them, the battery module is installed inside the box shell, and both the battery management unit and the fan are arranged outside the box shell. The acquisition wiring harness of the battery module needs to extend outside the box shell to be connected to the battery management unit, making the length of the acquisition wiring harness relatively long, and it is easy to cause chaos of the wiring harness outside the box shell. The wiring harness is located outside the box shell for a long time and is prone to aging and cracking, affecting the service life of the wiring harness.

[0003] Therefore, there is an urgent need to provide an air-cooled battery pack to solve the above problems. Utility Model Content

[0004] An object of this application is to provide an air-cooled battery pack, which shortens the length of the acquisition wiring harness between the battery module and the battery management unit, avoids wiring harness chaos, delays the aging rate of the wiring harness, and increases the service life of the wiring harness.

[0005] To achieve the above object, this application adopts the following technical solutions:

[0006] An air-cooled battery pack, comprising:

[0007] A box shell;

[0008] A battery module installed inside the box shell;

[0009] A battery management unit installed inside the box shell and located above the battery module, and the acquisition wiring harness of the battery module extends from the upper end of the battery module and is connected to the battery management unit.

[0010] As an alternative solution of the air-cooled battery pack, it further includes a support bracket, the support bracket includes a first connection part, a support part, and a second connection part connected to each other. The first connection part is fixedly connected to the peripheral side wall of the box shell, the support part is located above the battery module and is used to place at least part of the battery management unit, and the second connection part is fixedly connected to the battery management unit; and / or

[0011] It further includes a fixing bracket, the fixing bracket includes a fixing part and a bearing part connected to each other. The fixing part is fixedly connected to the top side wall of the box shell, and the bearing part is located above the battery module and is used to place at least part of the battery management unit.

[0012] As an alternative to the air-cooled battery pack, the number of the second connecting parts is two, the two second connecting parts are connected to two sides of the supporting part, and the battery management unit is located between the two second connecting parts.

[0013] As an alternative to the air-cooled battery pack, the number of the fixing brackets is two, the two fixing brackets are arranged corresponding to the two second connecting parts one by one, and the bearing parts of the two fixing brackets jointly bear the battery management unit.

[0014] As an alternative to the air-cooled battery pack, the fixing bracket further includes a guiding structure, the guiding structure is connected to one end of the fixing bracket close to the supporting part, the guiding structures of the two fixing brackets jointly form a guiding space, and the guiding space has a flared end facing the supporting part.

[0015] As an alternative to the air-cooled battery pack, the air-cooled battery pack further includes a fan, the fan is installed in the box shell and is located at the same end of the battery module as the battery management unit, and the fan is electrically connected to the battery management unit.

[0016] As an alternative to the air-cooled battery pack, the peripheral side wall of the box shell has an installation opening corresponding to the fan.

[0017] As an alternative to the air-cooled battery pack, the peripheral side wall of the box shell further has a maintenance opening, the maintenance opening is located on one side of the installation opening and corresponds to the battery management unit.

[0018] As an alternative to the air-cooled battery pack, the box shell further includes a maintenance window plate, the maintenance window plate is detachably installed outside the box shell and covers the installation opening and the maintenance opening, and the maintenance window plate has an opening communicated with the inlet end or the outlet end of the fan.

[0019] As an alternative to the air-cooled battery pack, it further includes a wire routing member, the wire routing member is installed in the box shell, the wire routing member has a wire routing groove for an external wire harness to pass through, and the box shell has an inlet hole communicated with the wire routing groove and an outlet hole communicated with the wire routing groove.

[0020] The beneficial effects of the present application are as follows:

[0021] The air-cooled battery pack provided by the present application includes a box shell, a battery module and a battery management unit. The battery management unit is located above the battery module. The acquisition wire harness of the battery module extends out from the upper end of the battery module and is connected to the battery management unit, which can shorten the length of the acquisition wire harness between the battery module and the battery management unit, avoid wire harness chaos, and the wire harness is located in the box shell, which can delay the aging rate of the wire harness and increase the service life of the wire harness. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the content of the embodiments of the present application and these drawings.

[0023] Figure 1 Shows a schematic structural diagram of the air-cooled battery pack provided by the present application;

[0024] Figure 2 Shows Figure 1 A partial cross-sectional view of the air-cooled battery pack in

[0025] Figure 3 Shows a partial structural diagram of the air-cooled battery pack (excluding the cover plate) provided by the present application;

[0026] Figure 4 Shows a partial structural diagram of the air-cooled battery pack (excluding the case and the battery management unit) provided by the present application;

[0027] Figure 5 Shows an exploded structural diagram of the air-cooled battery pack provided by the present application.

[0028] Reference numerals:

[0029] 1, case; 11, box body; 12, cover plate; 101, inlet hole; 102, outlet hole; 103, installation opening; 104, maintenance opening; 13, maintenance window plate; 131, opening;

[0030] 2, battery module;

[0031] 3, battery management unit;

[0032] 4, fan;

[0033] 5, support bracket; 51, first connection part; 52, support part; 53, second connection part;

[0034] 6, fixing bracket; 61, fixing part; 62, bearing part; 63, guiding structure; 631, first guiding plate; 632, second guiding plate;

[0035] 7, wire routing member; 71, wire routing groove. Detailed implementation manners

[0036] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0037] In this application, the terms "comprise", "include", "have" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element.

[0038] In this application, the term "and / or" describes the relationship between associated objects and indicates that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0039] In this application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or can be indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need for an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0040] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances due to manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus of a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. A numerical value without a relative term should also be disclosed as a particular value with a tolerance. In addition, when expressing a relative angular position relationship (such as substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus of a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0041] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0042] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "rear" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the orientation terms such as the upper side, lower side, left side, right side, front side, and rear side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0043] Figure 1 The structural schematic diagram of the air-cooled battery pack provided by this application is shown. Figure 2 Shown is Figure 1 The partial cross-sectional view of the air-cooled battery pack in Figures 1 to 2 As shown, the air-cooled battery pack provided by this application includes a box shell 1, a battery module 2, a battery management unit 3, and a fan 4. The battery module 2, the battery management unit 3, and the fan 4 are all installed in the box shell 1 to reduce the risk of short circuit of the battery management unit 3 and the fan 4 due to dripping water; the fan 4 is located at the end of the battery module 2. The box shell 1 has an air inlet communicating with the air inlet end of the fan 4 and an air outlet communicating with the air outlet end of the fan 4 to achieve air-cooled heat dissipation for the electrical components in the box shell 1; the battery management unit 3 is located above the battery module 2. The acquisition wire harness of the battery module 2 extends from the upper end of the battery module 2 and is connected to the battery management unit 3, which can shorten the length of the acquisition wire harness between the battery module 2 and the battery management unit 3, avoid wire harness chaos, and the wire harness is located in the box shell 1, which can delay the aging rate of the wire harness and increase the service life of the wire harness.

[0044] For convenience of description, referring to Figure 1 , the height direction of the box shell 1 is defined as "upper" and "lower", the end of the box shell 1 with the fan 4 is defined as "front", the end opposite to the "front" is defined as "rear", and the remaining two sides of the box shell 1 are defined as "left" and "right".

[0045] In one embodiment, the box shell 1 includes a box body 11 and a cover plate 12. The upper end of the box body 11 has a pick-and-place opening, and the battery module 2 and the battery management unit 3 are installed in the box body 11 through this pick-and-place opening. The cover plate 12 is detachably covered at the pick-and-place opening of the box body 11.

[0046] Figure 3 The partial structural schematic diagram of the air-cooled battery pack (omitting the cover plate 12) provided by this application is shown. Figure 4The figure shows a partial structural schematic diagram of the air-cooled battery pack provided by the present application (the case 1 and the battery management unit 3 are omitted). As Figures 3 to 4 shown, the air-cooled battery pack further includes a support bracket 5. The support bracket 5 includes a first connection part 51, a support part 52 and a second connection part 53 which are connected to each other. The first connection part 51 is fixedly connected to the peripheral side wall of the case 1. The support part 52 is located above the battery module 2 and is used for placing at least part of the battery management unit 3. The second connection part 53 is fixedly connected to the battery management unit 3. Further, the first connection part 51 is fixedly connected to the front side wall of the box body 11, and the second connection part 53 is fixedly connected to the battery management unit 3, so as to fixedly connect the battery management unit 3 to the front side wall of the box body 11 and limit the battery management unit 3 in the front-back direction.

[0047] The number of the second connection parts 53 is two. The two second connection parts 53 are connected to both sides of the support part 52, and the battery management unit 3 is located between the two second connection parts 53. Specifically, the two second connection parts 53 are respectively located on both sides of the support part 52 in the left-right direction. One second connection part 53 is fixedly connected to the left side of the battery management unit 3, and the other second connection part 53 is fixedly connected to the right side of the battery management unit 3. The battery management unit 3 can also be limited in the left-right direction through the two second connection parts 53.

[0048] In one embodiment, the second connection part 53 and the battery management unit 3 are detachably fixedly connected by screws. In another embodiment, the second connection part 53 and the battery management unit 3 can also be fixedly connected by other detachable means, which is not limited herein.

[0049] The first connection part 51 and the support part 52 are connected in a stepped manner. With such a setting, compared with the scheme in which the first connection part 51 and the support part 52 are flush-connected, the bending strength and the bearing strength of the first connection part 51 and the support part 52 can be improved, and thus the battery management unit 3 can be stably supported.

[0050] The fan 4 and the first connection part 51 are installed on the same peripheral side wall of the case 1, which can, to a certain extent, reduce the distance between the fan 4 and the battery management unit 3, and further shorten the length of the connecting wire harness between the two, avoiding the chaos caused by too long wire harness.

[0051] The air-cooled battery pack further includes a fixing bracket 6. The fixing bracket 6 includes a connected fixing part 61 and a bearing part 62. The fixing part 61 is fixedly connected to the top side wall of the box shell 1, and the bearing part 62 is located above the battery module 2 and is used to place at least part of the battery management unit 3. Further, the fixing part 61 is fixedly connected to the cover plate 12. The bearing part 62 is located below the fixing part 61. The battery management unit 3 is placed on the bearing part 62, and under the combined action of the bearing part 62 and the cover plate 12, the battery management unit 3 can be limited in the up-and-down direction.

[0052] It can be understood that in this embodiment, the battery management unit 3 is installed in the box shell 1 through the support bracket 5 and the fixing bracket 6, which can improve the stability of the battery management unit 3. In other embodiments, the battery management unit 3 can also be installed in the box shell 1 only through the support bracket 5 or the fixing bracket 6, and the installation and positioning of the battery management unit 3 can also be realized.

[0053] In this embodiment, the fixing part 61 and the bearing part 62 are connected in a stepped shape, which can improve the bending resistance and bearing strength of the fixing bracket 6.

[0054] The number of the fixing brackets 6 is two. The two fixing brackets 6 are arranged in one-to-one correspondence with the two second connecting parts 53. The bearing parts 62 of the two fixing brackets 6 jointly bear the battery management unit 3. Specifically, the two fixing brackets 6 are located on both sides of the battery management unit 3 in the left-right direction, and the battery management unit 3 is jointly borne and supported by the bearing parts 62 of the two fixing brackets 6 and the supporting part 52 of the support bracket 5.

[0055] The fixing bracket 6 further includes a guiding structure 63. The guiding structure 63 is connected to one end of the fixing bracket 6 close to the supporting part 52. The guiding structures 63 of the two fixing brackets 6 jointly form a guiding space, and the flared end of the guiding space faces the supporting part 52. When installing the battery management unit 3, on the one hand, the first connecting part 51 of the support bracket 5 is fixed to the front side wall of the box body 11, and then the battery management unit 3 is placed on the supporting part 52 of the support bracket 5; on the other hand, the two fixing brackets 6 are installed on the cover plate 12; when assembling the cover plate 12 and the box body 11, the cover plate 12 is assembled in a way of advancing from the rear side of the box body 11 to the front side. During this process, the flared end of the guiding structure 63 of the fixing bracket 6 can ensure that the battery management unit 3 smoothly enters between the two fixing brackets 6.

[0056] In this embodiment, the forming method of the guiding structure 63 is to bend one end of the connecting part of the fixing part 61 and the bearing part 62 outward to form a first guiding plate 631, and bend the same end of the bearing part 62 outward to form a second guiding plate 632. The first guiding plate 631 and the second guiding plate 632 jointly form the guiding structure 63.

[0057] Such asFigure 4 Combined Figure 1 As shown, the air-cooled battery pack further includes a wiring member 7. The wiring member 7 is installed inside the housing 1. The wiring member 7 has a wiring groove 71 for an external wiring harness to pass through. The housing 1 has an inlet hole 101 communicating with the wiring groove 71 and an outlet hole 102 communicating with the wiring groove 71, so as to facilitate the external wiring harness to enter the housing 1 and at the same time facilitate the wiring harness inside the housing 1 to extend out from the outlet hole 102, which can effectively avoid the problem of messy wiring harnesses and reduce the risk of short circuit caused by wiring harness contact. Further, the outlet hole 102 is located on the side of the housing 1 close to the battery management unit 3 to shorten the length of the external wiring harness inside and outside the housing 1, avoid chaos caused by too long wiring harnesses, and at the same time reduce the wiring harness cost.

[0058] Figure 5 Shows an exploded structural schematic diagram of the air-cooled battery pack provided by the present application. As Figure 5 Combined Figure 2 As shown, the peripheral side wall of the box body 11 has a mounting opening 103 corresponding to the fan 4 to facilitate the installation and maintenance of the fan 4. In addition, the air-cooled battery pack further includes a maintenance window plate 13. The maintenance window plate 13 is detachably installed outside the box body 11. The maintenance window plate 13 has a plurality of openings 131 arranged in a matrix. When the fan 4 is exhausting air inward, it can prevent large-particle sundries from entering the housing 1 and improve the safety of the battery pack.

[0059] The peripheral side wall of the box body 11 also has a maintenance opening 104. The maintenance opening 104 is located above the mounting opening 103 and corresponds to the battery management unit 3. The maintenance window plate 13 can also cover the maintenance opening 104 to protect the battery management unit 3. In addition, after removing the maintenance window plate 13, both the fan 4 and the battery management unit 3 can be maintained. Of course, in other embodiments, the maintenance opening 104 can also be located in other positions of the mounting opening 103, as long as it is on one side of the mounting opening 103 and does not affect the installation of the fan 4, which is not limited here.

[0060] In summary, the air-cooled battery pack provided by the present application has the following advantages: 1) The battery management unit 3 and the fan 4 are built-in. With the protection level of the housing 1 itself, the risk of condensation and failure is greatly reduced, and the overall service life of the battery pack and even the system is improved. 2) The battery management unit 3 is fixed inside the housing 1 by two brackets, namely a support bracket 5 and a fixing bracket 6, which can improve the stability of the battery management unit 3. 3) The battery management unit 3 is installed above the battery module 2. The acquisition wiring harness of the battery module 2 can be directly connected to the battery management unit 3 without passing through the air duct between the battery modules 2, and there is no need to worry about the aging problem of the wiring harness affected by the hot air. 4) The connection between the battery management unit 3 and the external wiring can effectively avoid the fan 4 through the wiring groove 71, and there is no need to worry about the aging problem of the wiring harness affected by the hot air.

[0061] The basic principles, main features and advantages of the present application have been shown and described above. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. An air-cooled battery pack, characterized in that, Comprising: A box housing (1); A battery module (2), installed inside the box housing (1); A battery management unit (3), installed inside the box housing (1) and located above the battery module (2), and the acquisition wire harness of the battery module (2) extends from the upper end of the battery module (2) and is connected to the battery management unit (3).

2. The air-cooled battery pack according to claim 1, wherein It further includes a support bracket (5), the support bracket (5) includes a connected first connection part (51), a support part (52) and a second connection part (53), the first connection part (51) is fixedly connected to the peripheral side wall of the box housing (1), the support part (52) is located above the battery module (2) and is used to place at least part of the battery management unit (3), and the second connection part (53) is fixedly connected to the battery management unit (3); and / or It further includes a fixing bracket (6), the fixing bracket (6) includes a connected fixing part (61) and a bearing part (62), the fixing part (61) is fixedly connected to the top side wall of the box housing (1), and the bearing part (62) is located above the battery module (2) and is used to place at least part of the battery management unit (3).

3. The air-cooled battery pack according to claim 2, wherein The number of the second connection parts (53) is two, the two second connection parts (53) are connected to both sides of the support part (52), and the battery management unit (3) is located between the two second connection parts (53).

4. The air-cooled battery pack according to claim 3, wherein The number of the fixing brackets (6) is two, the two fixing brackets (6) are arranged in one-to-one correspondence with the two second connection parts (53), and the bearing parts (62) of the two fixing brackets (6) jointly bear the battery management unit (3).

5. The air-cooled battery pack according to claim 4, wherein The fixing bracket (6) further includes a guiding structure (63), the guiding structure (63) is connected to one end of the fixing bracket (6) close to the support part (52), the guiding structures (63) of the two fixing brackets (6) jointly form a guiding space, and the guiding space has a flared end facing the support part (52).

6. The air-cooled battery pack according to claim 1, wherein, The air-cooled battery pack further includes a fan (4), the fan (4) is installed inside the box housing (1) and is located at the same end of the battery module (2) as the battery management unit (3), and the fan (4) is electrically connected to the battery management unit (3).

7. The air-cooled battery pack according to claim 6, characterized in that: The peripheral side wall of the box housing (1) has an installation opening (103) corresponding to the fan (4).

8. The air-cooled battery pack according to claim 7, characterized in that: The peripheral side wall of the box housing (1) further has a maintenance opening (104), the maintenance opening (104) is located on one side of the installation opening (103) and corresponds to the battery management unit (3).

9. The air-cooled battery pack according to claim 8, wherein, The box housing (1) further includes a maintenance window plate (13), the maintenance window plate (13) is detachably installed outside the box housing (1) and covers the installation opening (103) and the maintenance opening (104), and the maintenance window plate (13) has an opening (131) communicating with the inlet end or the outlet end of the fan (4).

10. The air-cooled battery pack according to any one of claims 1-9, characterized in that, It further includes a wire routing member (7), the wire routing member (7) is installed inside the box housing (1), the wire routing member (7) has a wire routing groove (71) for an external wiring harness to pass through, and the box housing (1) has an inlet hole (101) communicating with the wire routing groove (71) and an outlet hole (102) communicating with the wire routing groove (71).

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