CN220439775U

CN220439775U - Bus liquid cooling battery box

Info

Publication number: CN220439775U
Application number: CN202321931913.6U
Authority: CN
Inventors: 冯筱峰; 许科; 朱兴发; 章志宏
Original assignee: Wanxiang A123 Systems Asia Co Ltd
Current assignee: Wanxiang A123 Systems Asia Co Ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2024-02-02
Anticipated expiration: 2033-07-21

Abstract

The utility model relates to a bus liquid cooling battery box, which comprises a lower shell and an upper shell which are detachably connected, wherein a plurality of supporting structures are arranged at the bottoms of two sides of the lower shell, a flow channel path for cooling liquid to flow is arranged on a bottom plate of the lower shell, a plurality of water nozzles are arranged on the front end surface of the lower shell, and the water nozzles are communicated with a water inlet and a water outlet pipeline of the flow channel path. The utility model adopts the welding of the aluminum profile, can realize the simple and practical parts, reduces the mould cost of the parts, can realize the adjustment of the length of the battery pack by cutting different lengths according to the requirements, reduces the number of parts, improves the assembly efficiency, increases the liquid leakage risk of the liquid cooling of the blade, improves the working efficiency of the liquid cooling, and reduces the time cost, the design cost and the verification cost of the assembly of the battery box.

Description

Bus liquid cooling battery box

Technical Field

The utility model belongs to the field of lithium batteries, relates to a battery box for a bus, and particularly relates to a liquid cooling battery box for the bus.

Background

Under the pressure of the world energy crisis and the gradual decline of environmental quality, the electric automobile is environment-friendly compared with the internal combustion engine automobile, and has no energy dependence and other advantages. Electric bus plays an important role in town traffic. The lithium battery is safe and environment-friendly, and the lithium battery becomes the first choice of a bus power supply due to the advantage of high energy density. The bus power supply is mostly positioned at the bottom of the bus, the use environment condition is poor, the temperature is high in summer, the temperature is low in winter, the normal operation of the lithium battery can be influenced by humidity in rainy days, the lithium battery can not be discharged, the charging can not be carried out, or the micro short circuit can not be realized. In order to make the lithium battery for the bus work better and charge and discharge to the maximum extent, a good charge and discharge environment must be provided for the lithium battery.

The battery pack of the existing electric bus adopts air cooling to dissipate heat at present, but the battery pack adopting liquid cooling to dissipate heat is not in a form of adding a liquid cooling plate, and the following problems exist:

1) The installation of the liquid cooling plate in the assembly of the battery pack requires an additional increase in the size of the battery pack.

2) And correspondingly increasing working hours for assembling the liquid cooling plate.

3) The assembly liquid cooling plate needs to be applied to a plurality of water nozzle water piping connection's pipeline, and the risk of gas leakage weeping is high.

4) The later maintenance difficulty is high and the maintenance cost is high.

Disclosure of Invention

In order to solve the problem, the utility model provides a bus liquid cooling battery box, the battery box of the utility model lets the size arrangement of bus more nimble, can let the demand electric quantity of bus have more choices, can reduce time cost, design cost, the verification cost etc. of battery package.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a bus liquid cooling battery box which comprises a lower shell and an upper shell which are detachably connected, wherein a plurality of supporting structures are arranged at the bottoms of two sides of the lower shell, a flow channel path for cooling liquid to flow is arranged on a bottom plate of the lower shell, a plurality of water nozzles are arranged on the front end face of the lower shell, and the water nozzles are communicated with a water inlet and a water outlet pipeline of the flow channel path.

As a preferable mode of the utility model, the flow path comprises a first flow path group and a second flow path group, wherein the first flow path group and the second flow path group are four flow paths, and the end parts of the flow paths are communicated.

As a preferable scheme of the utility model, the utility model further comprises a third flow passage group and a fourth flow passage group, wherein the first flow passage group is communicated with the water inlet, and the flow direction of the second flow passage group is opposite to that of the first flow passage group; the third flow passage group and the first flow passage group have the same flow direction, the fourth flow passage group and the second flow passage group have the same flow direction, and the fourth flow passage group is communicated with the water outlet.

As a preferable scheme of the utility model, the supporting structure is a triangular supporting structure, and the supporting structures positioned at two sides of the lower shell are symmetrically arranged.

As a preferred embodiment of the present utility model, the number of the supporting structures is three, and the supporting structures are sequentially arranged at the front part, the middle part and the rear part of the lower housing.

As a preferable scheme of the utility model, the lower shell and the upper shell are fixed through a plurality of waterproof rivet nuts, and a waterproof sealing ring is arranged between the lower shell and the upper shell.

As a preferable scheme of the utility model, the upper shell is internally provided with heat insulation cotton.

As a preferable mode of the utility model, the number of the battery boxes can be multiple, and the welded multiple lower shells are fixed with the welded multiple upper shells.

Compared with the prior art, the utility model has the following beneficial effects:

1) The utility model can adjust the modular design of the length dimension of the battery box.

2) The utility model can adjust the length of the battery box and the size of the battery module according to the requirements of the vehicle.

3) The utility model adopts the welding of the aluminum profile, can realize the simple and practical parts, reduces the mould cost of the parts, and can realize the adjustment of the length of the battery pack only by cutting different lengths according to the requirements.

4) The utility model reduces the number of parts, improves the assembly efficiency, increases the leakage risk of liquid cooling of the blade, improves the working efficiency of liquid cooling, and reduces the time cost, the design cost and the verification cost of the assembly of the battery box.

Drawings

Fig. 1 is a schematic view of a lower housing of the present utility model.

Fig. 2 is a bottom view of the present utility model.

Fig. 3 is a cross-sectional view of the present utility model.

Fig. 4 is an assembly view of embodiment 1 of the present utility model.

Fig. 5 is an assembly view of embodiment 2 of the present utility model.

In the figure, 1. Lower housing; 2. a bottom plate; 3. a support structure; 4. a water tap; 5. waterproof rivet nut; 6. a waterproof sealing ring; 7. a water inlet; 8. a water outlet; 9. a flow path; 91. a first flow channel group; 92. a second flow path group; 93. a third flow path group; 94. a fourth flow channel group; 10. a battery module; 11. an upper case.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the utility model.

Referring to fig. 1 and 2, the utility model provides a bus liquid cooling battery box, comprising a lower shell 1 and an upper shell 11 which are detachably connected, wherein the bottoms of two sides of the lower shell 1 are respectively provided with a plurality of support structures 3, a bottom plate 2 of the lower shell 1 is provided with a flow channel path 9 for flowing cooling liquid, the front end surface of the lower shell 1 is provided with a plurality of water nozzles 4, the water nozzles 4 are communicated with a water inlet 7 and a water outlet 8 of the flow channel path 9 in a pipeline manner,

referring to fig. 2, the flow path 9 includes a first flow path group 91, a second flow path group 92, a third flow path group 93 and a fourth flow path group 94, the first flow path group 91 communicating with the water inlet 7, the second flow path group 92 having a flow direction opposite to that of the first flow path group 91; the third flow channel group 93 has the same flow direction as the first flow channel group 91, the fourth flow channel group 94 has the same flow direction as the second flow channel group 92, the fourth flow channel group 94 is communicated with the water outlet 8, the first flow channel group 91, the second flow channel group 92, the third flow channel group 93 and the fourth flow channel group 94 are four flow channels, and the end parts of the flow channels are communicated.

Referring to fig. 3, the number of the supporting structures 3 is three, and the supporting structures 3 are triangular supporting structures and are symmetrically arranged at the two sides of the lower shell, wherein the supporting structures are sequentially arranged at the front part, the middle part and the rear part of the lower shell.

The lower case 1 is internally provided with a fixing structure for fixing the battery module 10 (the fixing structure is matched with the existing battery module, not required).

The lower shell 1 and the upper shell 11 are fixed through a plurality of waterproof rivet nuts 5, a waterproof sealing ring 6 is further arranged between the lower shell 1 and the upper shell 11, and heat preservation cotton (not shown in the figure) is arranged inside the upper shell 11.

The upper housing 11, the lower housing 1, the supporting structure 3, and the bottom plate 2 are all formed by processing aluminum profiles, and the utility model processes a fixing structure for mounting and fixing the battery module 10 inside the lower housing 1, and the fixing structure is adapted to the existing battery module 10, which is not an improvement point of the utility model and is not repeated.

The aluminum profile is adopted to process the fixing structure, so that the defects of stress concentration and the like caused by welding can be eliminated.

Example 1

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, in the bus liquid cooling battery box disclosed in the present embodiment, the fixing structure of the battery box module 10 is obtained by processing front and rear aluminum profiles of the lower housing 1, and the fixing structure in this form can eliminate defects such as stress concentration caused by welding;

the supporting structure 3 adopts a special-shaped triangular supporting structure, the structural shell greatly improves the overall structural strength of the box body, reduces the distortion deformation amount of the aluminum profile caused by overlong, provides feasibility for flexibly adjusting the length size of the battery pack, has good stability when being used for designing a fixing structure and a hoisting structure of the box body, and can be used for mechanically cutting out parts which do not affect the structural strength to reduce the weight of the box body and improve the overall specific energy of the battery.

The regular runner path 9 is formed by machining the hollow space of the bottom plate 2, as shown in fig. 2, the runner path 9 is designed into a four-loop runner, the water inlet and outlet of the runner is directly connected to the water nozzle 4 outside the box body through welding, the use of pipeline connection is avoided, and the risk of air leakage and liquid leakage can be reduced.

The waterproof rivet nut 5 is matched with the waterproof sealing ring 6 on the installation surfaces of the lower shell 1 and the upper shell 11 of the battery box, so that the overall air tightness of the battery pack can be Ip67; the heat insulation cotton needs to be adhered to the inside of the upper shell 11, so that heat conduction between the inside of the battery box and the outside is reduced, and the working efficiency of liquid cooling and the working performance of the battery are improved.

Example 2

Referring to fig. 5, the present embodiment is basically the same as embodiment 1, except that the upper case 11 of the present utility model is formed by welding 2 separate upper cases, the lower case 1 is formed by welding two separate lower cases, and after the two battery modules 10 are respectively mounted and fixed, the upper case 11 and the lower case 1 are mounted and fixed, thereby completing the assembly of the battery case.

Of course, the utility model is not only a combination of a single upper shell and a lower shell or two upper shells and a plurality of lower shells, but also can adjust the length of the battery box and the size of the battery module according to the requirement of a vehicle, and the battery box lower shells with different length sizes can be assembled by cutting the aluminum profiles of the bottom plate of the lower shells and the left and right profiles of the lower shells with different lengths and welding the lower shells with different length sizes.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. The utility model provides a bus liquid cooling battery box, its characterized in that, including lower casing and the last casing of detachable connection, lower casing both sides bottom all is equipped with a plurality of bearing structure, the bottom plate of lower casing is equipped with the runner route that is used for the coolant liquid to flow, the terminal surface is equipped with a plurality of water injection well choke before the lower casing, water injection well choke and the water inlet and the delivery port pipeline intercommunication of runner route.

2. The bus liquid-cooled battery box of claim 1, wherein the flow path comprises a first flow path group and a second flow path group, the first flow path group and the second flow path group are four flow paths, and the end parts of the flow paths are communicated.

3. The bus liquid-cooled battery box of claim 2, further comprising a third flow channel set and a fourth flow channel set, wherein the first flow channel set is in communication with the water inlet, and the second flow channel set is opposite to the first flow channel set in flow direction; the third flow passage group and the first flow passage group have the same flow direction, the fourth flow passage group and the second flow passage group have the same flow direction, and the fourth flow passage group is communicated with the water outlet.

4. The bus liquid cooling battery box according to claim 1, wherein the supporting structure is a triangular supporting structure, and the supporting structures located at two sides of the lower shell are symmetrically arranged.

5. The bus liquid-cooled battery box of claim 1, wherein the number of the supporting structures is three, and the supporting structures are sequentially arranged at the front part, the middle part and the rear part of the lower shell.

6. The bus liquid cooling battery box according to claim 1, wherein the lower shell and the upper shell are fixed through a plurality of waterproof rivet nuts, and a waterproof sealing ring is further arranged between the lower shell and the upper shell.

7. The bus liquid cooling battery box according to claim 1, wherein heat preservation cotton is arranged inside the upper shell.

8. The bus liquid-cooled battery box according to claim 1, wherein the number of the battery boxes is plural, and the welded lower shells are fixed with the welded upper shells.