CN219873688U

CN219873688U - Battery pack

Info

Publication number: CN219873688U
Application number: CN202223303073.7U
Authority: CN
Inventors: 王永华; 蔡宁; 张涛; 施婕; 夏雨; 郭良合; 刘明
Original assignee: Shanghai Rongheyuan Energy Storage Co ltd
Current assignee: Shanghai Rongheyuan Energy Storage Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-10-20
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses a battery pack, comprising: the battery module comprises a shell, a plurality of battery modules, an air cooling device and a direct cooling phase change device. The casing has and holds the chamber, and each battery module all sets up in holding the intracavity, and air cooling device connects in casing or battery module, and direct cooling phase change device sets up in holding the intracavity, and direct cooling phase change device has the cavity and sets up the phase change material in the cavity. The battery pack combines the air cooling device and the direct-cooling phase change device, improves the cooling efficiency, can meet the cooling requirement of quick charge and quick discharge of the battery module, has the cooling efficiency close to or higher than that of a liquid cooling system, but has simpler structure, lower manufacturing cost and stronger popularization.

Description

Battery pack

Technical Field

The utility model relates to the technical field of storage battery cooling, in particular to a battery pack.

Background

In recent years, the electromechanical equipment gradually replaces the traditional fuel oil mechanical equipment by the characteristics of energy conservation and environmental protection. The electric machine uses electric energy as power, and drives the machine body to run through the motor. The energy storage battery is used as an electric power source on an electric machine, and along with the efficient use of the energy storage battery, the high-rate charge and discharge scenes are more and more, the heating value of the battery module is increased, and the performance of the storage battery is reduced or the service life of the storage battery is shortened due to the excessive rise of the temperature. In the prior art, an energy storage battery is generally made into a battery pack, and the battery pack mainly comprises a battery module, a battery shell, a cooling system and a circuit system. And meanwhile, a cooling system is added into the battery pack to cool the battery module.

The existing battery module cooling technology comprises an air cooling system and a liquid cooling system, wherein the air cooling system mainly blows air to the battery module through a fan with power so as to achieve the effect of cooling the battery module, and the battery module cooling technology has the defects of poor soaking performance and low cooling efficiency although the cost is low. The liquid cooling system wraps the cooling liquid in the pipeline, the pipeline body is wound around the battery modules, the cooling liquid flows through each battery module to take away heat to cool the battery modules at high temperature, the cooling effect of the liquid cooling system is good, but because the cooling liquid of the liquid cooling system needs to enter and exit the battery pack, the technical material has higher technological requirements, the system has a complex structure and higher manufacturing cost.

In view of this, the present utility model has been made.

Disclosure of Invention

The utility model provides a battery pack.

The utility model provides the following technical scheme:

a battery pack, comprising:

a housing having a receiving cavity;

the battery modules are arranged in the accommodating cavity;

the air cooling device is connected with the shell or the battery module;

the direct-cooling phase change device is arranged in the accommodating cavity and is provided with a cavity and a phase change material arranged in the cavity.

Optionally, the direct-cooling phase change device is arranged between the inner wall of the shell and the battery module;

and/or the direct-cooling phase change device is arranged between the adjacent battery modules.

Optionally, the housing has a bottom wall, a top wall, and a side wall disposed between the bottom wall and the top wall;

the direct-cooling phase change device is arranged on the bottom wall and/or the side wall.

Optionally, the direct-cooling phase change device is sheet-shaped.

Optionally, the direct-cooling phase change device is adhered to the battery module through an adhesive layer.

Optionally, the direct-cooling phase change device is provided with a first plate body and a second plate body;

the first plate body is a straight plate body, the second plate body is provided with a concave-convex shape, the first plate body is attached to the second plate body, and the cavity is formed between the first plate body and the second plate body;

the first plate body is adhered to the battery module.

Optionally, the battery pack includes at least two battery modules, and the number of the direct-cooling phase change devices is equal to the number of the battery modules;

each direct-cooling phase change device is respectively attached to the corresponding battery module.

Optionally, an interlayer cavity is arranged between two adjacent battery modules;

the air suction side or the air blowing side of the air cooling device is opposite to the interlayer cavity.

Optionally, the battery pack comprises an air duct shell;

the air duct shell is arranged between the two battery modules, and extends along the edge of the interlayer cavity so as to seal part of the edge of the interlayer cavity.

Optionally, two sides of the air duct shell are respectively adhered to the battery module through foam.

Optionally, the interlayer cavity has an opening;

the air cooling device is arranged on the air duct shell, and the rotation axis of the fan blade of the air cooling device faces the opening.

Optionally, the battery module comprises a plurality of battery monomers, and each battery monomer is sequentially arranged at intervals;

an inter-cell harmonica pipe is arranged between two adjacent battery monomers, and the inter-cell harmonica pipe is communicated with the interlayer cavity;

the shell is provided with corresponding vent hole groups corresponding to the harmonica pipes among the electric cores respectively.

By adopting the technical scheme, the utility model has the following beneficial effects:

the battery pack combines the air cooling device and the direct-cooling phase change device, improves the cooling efficiency, can meet the cooling requirement of quick charge and quick discharge of the battery module, has the cooling efficiency close to or higher than that of a liquid cooling system, but has simpler structure, lower manufacturing cost and stronger popularization.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

Fig. 1 is a first view of an exploded view of a battery pack according to an embodiment of the present utility model;

fig. 2 is a second view of an exploded view of a battery pack according to an embodiment of the present utility model;

fig. 3 is an exploded view (with a portion of the housing removed) of a battery pack from a side of the battery pack facing away from the fan according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a battery pack according to an embodiment of the present utility model with a portion of the housing and the air cooling device removed;

fig. 5 is a schematic structural diagram of a direct-cooling phase change device of a battery pack according to an embodiment of the present utility model;

fig. 6 is a partial structural sectional view of a direct-cooling phase change device of a battery pack according to an embodiment of the present utility model.

In the figure: the battery pack comprises a shell 1, a bottom wall 11, a top wall 12, side walls 13, a vent hole group 131, a battery module 2, a battery cell 21, an inter-cell harmonica tube 22, an air cooling device 3, a direct cooling phase change device 4, a first plate 41, a second plate 42, a phase change material 43, a glue layer 5, an air duct shell 6, foam 7, an aluminum tube 8 and an opening 9.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "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 apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" 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. 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.

Referring to fig. 1 to 6, an embodiment of the present utility model provides a battery pack including: the battery module comprises a shell 1, a plurality of battery modules 2, an air cooling device 3 and a direct cooling phase change device 4. The shell 1 is provided with a containing cavity, each battery module 2 is arranged in the containing cavity, the air cooling device 3 is connected with the shell 1 or the battery module 2, the direct-cooling phase change device 4 is arranged in the containing cavity, and the direct-cooling phase change device 4 is provided with a cavity and a phase change material 43 arranged in the cavity. When the direct cooling phase-changing device contacts the battery module 2, the phase-changing material 43 in the cavity can absorb and take away heat generated in the charge and discharge processes of the battery module 2, so that the phase of the phase-changing device is changed but the temperature change of the phase-changing device is not large, and the effect of rapidly cooling the battery module 2 is achieved. The battery pack combines the air cooling device 3 and the direct-cooling phase change device 4, improves the cooling efficiency, can meet the cooling requirement of quick charge and quick discharge of the battery module 2, and has the advantages of close or higher cooling efficiency compared with a liquid cooling system, simpler structure, lower manufacturing cost and stronger popularization.

In one possible embodiment, the direct-cooling phase change device 4 is disposed between the inner wall of the case 1 and the battery module 2, and/or the direct-cooling phase change device 4 is disposed between adjacent battery modules 2. The direct-cooling phase change device 4 absorbs heat when contacting the battery module 2, so the closer the direct-cooling phase change device 4 can contact the battery module 2, the better the cooling effect.

In one possible embodiment, the housing 1 has a bottom wall 11, a top wall 12 and a side wall 13 arranged between the bottom wall 11 and the top wall 12, the direct-cooled phase change device 4 being arranged on the bottom wall 11 and/or the side wall 13. Because the top of the battery module 2 is provided with a circuit structure, the direct-cooling phase-change device 4 is inconvenient for the top wall 12, and the side wall 13 is provided with an air outlet of the air cooling system, if the direct-cooling phase-change device 4 is arranged on the side wall 13, the heat dissipation of the hot air discharged by the air cooling system can be blocked. Preferably, the direct cooling phase change device 4 can be arranged on the bottom wall 11, no cooling equipment is arranged on one side, close to the bottom wall 11, of the battery module 2, the direct cooling phase change device 4 is arranged on the bottom wall 11, the occupied space is small, the structure is compact, and the cooling effect is good on one side, close to the bottom wall 11, of the battery module 2.

In one possible embodiment, the direct-cooled phase change device 4 is in the form of a sheet. The flaky direct-cooling phase change device 4 is more beneficial to arrangement, can be attached to the bottom wall 11, is arranged into a flaky shape, has larger surface area, has large contact area with the battery module 2, has higher heat exchange efficiency, is beneficial to absorbing more heat generated in the charging and discharging processes of the battery module 2, and has better cooling effect.

In one possible embodiment, the direct-cooled phase change device 4 is adhered to the battery module 2 by an adhesive layer 5. The direct-cooling phase change device 4 is flaky and is easy to adhere to the battery module 2 through the adhesive layer 5, the adhesive layer 5 adheres to enable the direct-cooling phase change device 4 to be closer to the battery module 2, and the phase change material 43 in the cavity of the direct-cooling phase change device 4 is easier to absorb heat of the battery module 2, so that the battery module 2 is cooled faster.

In one possible embodiment, as shown in fig. 6, the direct-cooled phase change device 4 has a first plate 41 and a second plate 42. The first plate 41 is a flat plate, the second plate 42 has a concave-convex shape, the first plate 41 is attached to the second plate 42, and the cavity is formed between the first plate 41 and the second plate 42. As shown in fig. 5, the dotted line portion may be an aluminum pipe 8, and is used for connecting the interface of the direct-cooling phase-change device 4, and the aluminum pipe 8 may be used to blow air into the cavity, so that the cavity is inflated to form a storage flow channel of the phase-change material 43, the aluminum pipe 8 is used to fill the cavity with the phase-change material 43, and after the filling is completed, the aluminum pipe 8 may be removed, and the direct-cooling phase-change device 4 is sealed, so that the direct-cooling phase-change device 4 is completed. The direct-cooling phase change device 4 is a mature technology in the prior art and is commercially available. For example, a direct-cooling phase-change product of Guangdong new creative technology limited company can be selected, and an expansion plate type vapor chamber produced by the company can be suitable for the direct-cooling phase-change device 4. The first plate 41 is adhered to the battery module 2. The concave-convex shape with respect to the second plate body 42 is not advantageous for adhesion to the battery module 2, and the first plate body 41 is a flat plate body, which is more easily adhered to the battery module 2 using a gel.

In one possible embodiment, the battery pack includes at least two battery modules 2, the number of the direct-cooling phase-change devices 4 is equal to the number of the battery modules 2, and each direct-cooling phase-change device 4 is respectively attached to the corresponding battery module 2. The direct-cooling phase-change device 4 is arranged below each group of battery modules 2, and the direct-cooling phase-change device 4 performs phase-change cooling on each group of battery modules 2, so that the cooling effect is good.

In one possible embodiment, a sandwich chamber is provided between two adjacent battery modules 2, and the suction side or the blowing side of the air cooling device 3 is disposed opposite to the sandwich chamber. When the fan blades of the air cooling device 3 rotate, air is blown into the interlayer cavity, so that air in the interlayer cavity flows, and the flowing air takes away heat generated in the charging and discharging process of the battery module 2, so that the effect of cooling the battery module 2 is achieved.

In one possible embodiment, the battery pack includes a duct case 6, the duct case 6 is disposed between the two battery modules 2, and the duct case 6 is disposed to extend along the edge of the interlayer cavity to block a portion of the edge of the interlayer cavity. If the air duct shell 6 does not exist, high-speed air flow generated by rotation of the fan blade of the air cooling device 3 can be dispersed to the periphery, so that air circulation of the interlayer cavity is not facilitated, the air duct shell 6 is used for blocking part of edges of the interlayer cavity, an air duct beneficial to air circulation is formed, air in the interlayer cavity can circulate at a high speed, and the heat dissipation effect is better.

In one possible embodiment, both sides of the air duct case 6 are adhered to the battery module 2 through foam 7, respectively. The foam 7 is made of foamed plastic particles, and the foam 7 has the characteristics of certain thickness, elasticity, tightness, light weight and the like, and the air duct shell 6 and the battery module 2 are bonded together through the foam 7, so that the air duct shell is easy to bond and is sealed and does not leak air.

In one possible embodiment, the interlayer cavity has an opening 9, the air cooling device 3 is mounted on the air duct housing 6, and the rotation axis of the fan blade of the air cooling device 3 is disposed toward the opening 9. The air flow formed when the fan blade of the air cooling device 3 rotates can smoothly enter/exit the opening 9, so that the air in the interlayer cavity circulates at a high speed.

In one possible embodiment, the battery module 2 includes a plurality of battery cells 21, each battery cell 21 is disposed at intervals in sequence, an inter-cell harmonica tube 22 is disposed between two adjacent battery cells 21, the inter-cell harmonica tubes 22 are communicated with the interlayer cavity, and the housing 1 is provided with a corresponding vent group 131 corresponding to each inter-cell harmonica tube 22. When the fan blades of the air cooling device 3 rotate, high-speed air flow is formed, enters/exits the interlayer cavity through the opening 9, and the high-speed air flow is discharged through the inter-cell harmonica tube 22 on the battery modules 2 on the two sides and then is discharged through the corresponding vent hole group 131 on the shell 1. When the high-speed air flow passes through the gaps of the inter-cell harmonica pipe 22 between the battery cells 21, the area of the high-speed air flow contacting each battery cell 21 is increased, more heat on the surface of the battery cell 21 is taken away, and the cooling effect is better.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the application to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A battery pack, comprising:

a housing having a receiving cavity;

the battery modules are arranged in the accommodating cavity, and an interlayer cavity is arranged between every two adjacent battery modules;

the direct-cooling phase change device is arranged in the accommodating cavity and is provided with a cavity and a phase change material arranged in the cavity;

the air duct shell is arranged between the two battery modules, extends along the edge of the interlayer cavity to block part of the edge of the interlayer cavity, and is adhered to the battery modules through foam cotton at two sides of the air duct shell, and the interlayer cavity is provided with an opening;

the air cooling device is connected to the shell or the battery module, the air cooling device is installed on the air duct shell, and the rotation axis of the fan blade of the air cooling device faces towards the opening.

2. The battery pack according to claim 1, wherein the direct-cooling phase change device is disposed between an inner wall of the case and the battery module;

3. The battery pack of claim 1, wherein the housing has a bottom wall, a top wall, and a side wall disposed between the bottom wall and the top wall;

4. The battery pack of claim 1, wherein the direct-cooled phase change device is sheet-shaped.

5. The battery pack of claim 1, wherein the direct-cooled phase change device is adhered to the battery module by an adhesive layer.

6. The battery pack of claim 5, wherein the direct-cooled phase change device has a first plate and a second plate;

the first plate body is adhered to the battery module.

7. The battery pack according to claim 1, comprising at least two battery modules, the number of the direct-cooling phase change devices being equal to the number of the battery modules;

8. The battery pack according to claim 1, wherein the battery module comprises a plurality of battery cells, each of which is arranged at intervals in sequence;