CN221262554U - Battery pack and energy storage system - Google Patents

Abstract

The utility model relates to the technical field of energy storage and discloses a battery pack and an energy storage system, wherein the battery pack comprises a battery pack main body and a heat management plate assembly with a flow channel, the bottom surface of the battery pack main body is provided with a containing groove, the heat management plate assembly is arranged in the containing groove and is connected with the bottom surface of the containing groove, and the length dimension of the heat management plate assembly is not greater than the depth dimension of the containing groove along the depth direction of the containing groove, namely, the heat management plate assembly is completely contained in the containing groove. In practical application, the bottom surface of battery package main part is placed on the working plane, because thermal management board subassembly holds in the holding tank completely, and thermal management board subassembly does not need to be as atress structure, consequently, thermal management board subassembly need not to consider its bearing capacity when designing, based on this, the thermal management board subassembly that has the runner, and its wall thickness can design to be littleer to this weight that can lighten thermal management board subassembly makes the battery package can realize the lightweight design.

Description

Battery pack and energy storage system

Technical Field

The utility model relates to the technical field of energy storage, in particular to a battery pack and an energy storage system.

Background

The battery pack is energy storage equipment commonly used in the energy storage industry, wherein, the battery pack includes battery module, box and upper cover, and box and upper cover cooperation define the holding chamber, and battery module sets up in the holding intracavity, and battery module is used for storing and providing the electric energy. In practical application, battery module work can produce heat, if battery module temperature is too high then can influence the normal clear of its work, based on this, the battery package needs to carry out thermal management at the in-process of work, and one of them is the liquid cooling of energy storage trade battery package heat management mode, in the correlation technique, the battery package design has the liquid cooling board of runner, the liquid cooling board sets up in the holding intracavity and with battery module's bottom contact, cold water machine drive coolant liquid flows in the runner of liquid cooling board through the pipeline and circulates, heat takes away through the mode of heat conduction, thereby accomplish the heat management work of battery package. However, such a thermal management structure in which the liquid cooling plate is disposed at the bottom of the battery module requires to participate in structural stress, and therefore, the liquid cooling plate provided with the flow channel requires a sufficiently large wall thickness to have a sufficiently strong bearing capacity so as to bear the pressure of the battery module, and the weight of the liquid cooling plate is increased along with the increase of the wall thickness, so that the liquid cooling plate is applied to the battery pack, which is not beneficial to realizing the lightweight design of the battery pack.

Disclosure of utility model

The primary purpose of the utility model is: a battery pack of a lightweight design is provided.

In order to achieve the above object, the present utility model provides a battery pack, including a battery pack body and a thermal management plate assembly having a flow channel, wherein a receiving groove is formed in a bottom surface of the battery pack body, the thermal management plate assembly is disposed in the receiving groove and is connected to a bottom surface of the receiving groove, and a length dimension of the thermal management plate assembly along a depth direction of the receiving groove is not greater than a depth dimension of the receiving groove.

In a specific embodiment of the present utility model, the battery pack further includes a heat conductive connection layer disposed between the thermal management plate assembly and the bottom surface of the receiving groove, and the heat conductive connection layer connects the thermal management plate assembly and the bottom surface of the receiving groove.

In a specific embodiment of the present utility model, the thermally conductive connection layer is an aluminum-based solder layer.

In a specific embodiment of the present utility model, the thermal management plate assembly includes an inlet split-flow tube, a first harmonica-shaped runner tube, a connecting runner tube, a second harmonica-shaped runner tube and an outlet manifold, wherein the inlet split-flow tube and the connecting runner tube are arranged in parallel along a first direction, the first harmonica-shaped runner tube is connected with the inlet split-flow tube and the connecting runner tube, the second harmonica-shaped runner tube is connected with the connecting runner tube and the outlet manifold, and the inlet split-flow tube, the first harmonica-shaped runner tube, the connecting runner tube, the second harmonica-shaped runner tube and the outlet manifold are matched to form the runner;

And one ends of the first harmonica runner pipe and the second harmonica runner pipe along the thickness direction of the first harmonica runner pipe are connected with the bottom surface of the accommodating groove.

In a specific embodiment of the present utility model, the battery pack main body includes a battery module, a lower case, and a cover, where the cover is connected with the lower case and defines a receiving chamber, the battery module is connected with the lower case, and the battery module is located in the receiving chamber, and the receiving groove is disposed on a bottom surface of the lower case.

In a specific embodiment of the utility model, the lower box body comprises a frame and a temperature-equalizing bottom plate, the frame is provided with a mounting through hole, the bottom of the frame is provided with a supporting convex rod extending along the first direction, both ends of the frame along the second direction are respectively provided with the supporting convex rod, the temperature-equalizing bottom plate is connected with the bottom surface of the frame and shields the mounting through hole, the temperature-equalizing bottom plate is positioned between the two supporting convex rods, the supporting convex rod and the temperature-equalizing bottom plate define the accommodating groove, and both ends of the accommodating groove along the first direction are open ends; the heat management plate assembly is connected with the uniform temperature bottom plate;

the battery module comprises a battery pack and end plates, wherein the two ends of the battery pack in the first direction are connected with the end plates, the end plates are carried on the frame, and the bottom surface of the battery pack is connected with the uniform temperature bottom plate;

wherein the first direction and the second direction are arranged in an intersecting manner.

In a specific embodiment of the present utility model, the lower case further includes a reinforcing rod, the length direction of the reinforcing rod is the first direction, the reinforcing rod is located in the mounting through hole, and two ends of the reinforcing rod along the length direction are connected with the frame.

In a specific embodiment of the present utility model, the frame and the reinforcing rod are of a unitary structure.

In a specific embodiment of the utility model, a lifting hole is formed on the outer side of the frame.

The utility model also provides an energy storage system which comprises the battery pack.

Compared with the prior art, the battery pack and the energy storage system have the beneficial effects that:

In the battery pack of the present utility model, the length dimension of the thermal management plate assembly in the depth direction of the receiving groove is not greater than the depth dimension of the receiving groove, i.e., the thermal management plate assembly is completely received in the receiving groove. In practical application, the bottom surface of battery package main part is placed on the working plane, because thermal management board subassembly holds in the holding tank completely, and thermal management board subassembly does not need to be as atress structure, consequently, thermal management board subassembly need not to consider its bearing capacity when designing, based on this, the thermal management board subassembly that has the runner, and its wall thickness can design to be littleer to this weight that can lighten thermal management board subassembly makes the battery package can realize the lightweight design.

Drawings

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

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

Fig. 3 is a cross-sectional view of a battery pack according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of A in FIG. 3 in accordance with an embodiment of the present utility model;

FIG. 5 is a block diagram of a lower case of an embodiment of the present utility model;

FIG. 6 is a block diagram of a thermal management plate assembly according to an embodiment of the utility model.

In the figure, 1, a battery pack main body; 101. a receiving groove; 102. a receiving chamber; 11. a battery module; 111. a battery pack; 112. an end plate; 12. a lower box body; 121. a frame; 1211. supporting the convex rod; 1212. a hoisting hole; 122. a temperature equalizing bottom plate; 123. a reinforcing rod; 13. a cover body; 2. a thermal management plate assembly; 21. an inlet shunt; 22. a first harmonica flow conduit; 23. connecting a runner pipe; 24. a second harmonica flow conduit; 25. an outlet manifold; 3. a thermally conductive connection layer; x, a first direction; y, second direction.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element 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 application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "plurality" means two or more, unless specifically defined otherwise.

In the description of the present application, 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 either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The utility model provides an energy storage system, which comprises a battery pack, wherein the battery pack is used for storing and providing electric energy.

As shown in fig. 1 to 6, a battery pack according to a preferred embodiment of the present utility model includes a battery pack body 1 and a thermal management plate assembly 2 having a flow path, wherein a receiving groove 101 is formed in a bottom surface of the battery pack body 1, the thermal management plate assembly 2 is disposed in the receiving groove 101 and is connected to a bottom surface of the receiving groove 101, and a length dimension of the thermal management plate assembly 2 along a depth direction of the receiving groove 101 is not greater than a depth dimension of the receiving groove 101, that is, the thermal management plate assembly 2 is completely received in the receiving groove 101.

In practical application, the bottom surface of the battery pack body 1 is placed on the working plane, and since the thermal management board assembly 2 is completely accommodated in the accommodating groove 101, the thermal management board assembly 2 is not used as a stress structure, so that the thermal management board assembly 2 does not need to consider its bearing capacity in design, based on this, the thermal management board assembly 2 with the flow channels can be designed to be smaller in wall thickness, so that the weight of the thermal management board assembly 2 can be reduced, and the battery pack can be designed to be light.

As shown in fig. 4, the battery pack further includes a heat conductive connection layer 3, the heat conductive connection layer 3 is disposed between the heat management plate assembly 2 and the bottom surface of the receiving groove 101, and the heat conductive connection layer 3 connects the heat management plate assembly 2 and the bottom surface of the receiving groove 101. Preferably, the heat conducting connection layer 3 is an aluminum-based brazing material layer, in practical application, the aluminum-based brazing material is coated on one side of the heat management board assembly 2 connected with the bottom surface of the accommodating groove 101 and the bottom surface of the accommodating groove 101, one side of the heat management board assembly and the bottom surface of the accommodating groove 101 coated with the aluminum-based brazing material are attached, and then the heat management board assembly and the accommodating groove are placed into a brazing furnace together for brazing and bonding, so that the aluminum-based brazing material layer is formed. Because the aluminum-based brazing filler metal layer has high heat conductivity, the aluminum-based brazing filler metal layer is selected as the heat conduction connecting layer 3, so that the connection strength of the heat management plate assembly 2 and the battery pack main body 1 can be ensured, good heat conduction between the heat management plate assembly 2 and the battery pack main body 1 can be ensured, and the cooling effect of the heat management plate assembly 2 on the battery pack main body 1 is improved.

In other embodiments, the heat-conducting connection layer 3 may also be a heat-conducting gel layer, which can ensure the connection strength between the heat management plate assembly 2 and the battery pack body 1, and ensure that the heat management plate assembly 2 and the battery pack body 1 form good heat conduction, which is not limited in the present utility model.

As shown in fig. 6, the thermal management plate assembly 2 includes an inlet split-flow tube 21, a first harmonica flow channel tube 22, a connecting flow channel tube 23, a second harmonica flow channel tube 24 and an outlet manifold 25, where the inlet split-flow tube 21 and the outlet manifold 25 are arranged in parallel, the inlet split-flow tube and the connecting flow channel tube 23 are arranged in parallel along a first direction X, the first harmonica flow channel tube 22 connects the inlet split-flow tube 21 and the connecting flow channel tube 23, the second harmonica flow channel tube 24 connects the connecting flow channel tube 23 and the outlet manifold 25, the inlet split-flow tube 21, the first harmonica flow channel tube 22, the connecting flow channel tube 23, the second harmonica flow channel tube 24 and the outlet manifold 25 cooperate to form a flow channel, specifically, the first harmonica flow channel tube 22 and the second harmonica flow channel tube 24 are all provided with a plurality of channels penetrating along the first direction X.

One end of the first harmonica runner pipe 22 and the second harmonica runner pipe 24 along the thickness direction thereof is connected with the bottom surface of the accommodating groove 101, so that the first harmonica runner pipe 22, the second harmonica runner pipe 24 and the battery pack body 1 are ensured to have enough contact areas, and the cooling effect of the thermal management plate assembly 2 on the battery pack body 1 is ensured. In practical application, the cooling liquid is input into the flow channel from the inlet shunt tube 21, and sequentially passes through the first harmonica flow channel tube 22, the connecting flow channel tube 23 and the second harmonica flow channel tube 24 to be output from the outlet collecting tube 25, so as to realize cooling of the battery pack main body 1.

In practical applications, the number of the first harmonica flow channel tubes 22 and the second harmonica flow channel tubes 24 may be set according to the actual size of the battery pack body 1, so as to ensure the normal performance of the thermal management operation of the battery pack, which is not limited in the present utility model. Illustratively, as shown in FIG. 6, the first harmonica flow conduit 22 and the second harmonica flow conduit 24 are each provided with two.

As shown in fig. 2 and 3, the battery pack body 1 includes a battery module 11, a lower case 12, and a cover 13, the cover 13 and the lower case 12 are connected and define a receiving chamber 102, the battery module 11 is connected with the lower case 12, and the battery module 11 is located in the receiving chamber 102, a receiving groove 101 is provided at the bottom surface of the lower case 12, and the battery pack stores and supplies electric energy through the battery module 11.

As shown in fig. 5, the lower case 12 includes a frame 121 and a temperature equalization bottom plate 122, the frame 121 has an installation through hole, the bottom of the frame 121 has a supporting protruding rod 1211 extending along a first direction X, both ends of the frame 121 along a second direction Y are provided with supporting protruding rods 1211, the temperature equalization bottom plate 122 is connected with the bottom surface of the frame 121 and shields the installation through hole, the temperature equalization bottom plate 122 is located between the two supporting protruding rods 1211, the supporting protruding rods 1211 and the temperature equalization bottom plate 122 define a containing groove 101, both ends of the containing groove 101 along the first direction X are open ends, and the thermal management plate assembly 2 is connected with the temperature equalization bottom plate 122. In practical use, the bottom surface of the support rod 1211 is mounted on the work plane. Specifically, in the accommodating groove 101 with the structure, the inlet shunt tube 21 and the outlet manifold 25 can extend out of one open end of the accommodating groove 101, and the connecting runner tube 23 can extend out of the other open end, so that the first harmonica runner tube 22 and the second harmonica runner tube 24 are connected with the uniform temperature base plate 122, and the cooling effect of the thermal management plate assembly 2 on the battery pack main body 1 is guaranteed; it is also advantageous for the inlet manifold 21, the outlet manifold 25 to be connected to the coolant circulation pipes.

As shown in fig. 2, the battery module 11 includes a battery pack 111 and end plates 112, two ends of the battery pack 111 along the first direction X are connected with the end plates 112, as shown in fig. 4, the end plates 112 are mounted on the frame 121, and the bottom surface of the battery pack 111 is connected with the uniform temperature bottom plate 122, so that heat generated by the operation of the battery pack 111 can be better transferred to the thermal management plate assembly 2, so as to ensure the thermal management performance of the battery pack. Specifically, the frame 121 and the temperature-equalizing bottom plate 122 are connected together in a welded manner, in practical application, the frame 121 and the temperature-equalizing bottom plate 122 both play a role in supporting the battery module 11, and the battery pack mainly generates heat for the battery pack 111 in the working process, so that the end plate 112 is mounted on the frame 121, the battery pack 111 is mounted on the temperature-equalizing bottom plate 122, and the cooling effect of the thermal management plate assembly 2 on the battery module 11 can be guaranteed while the stable setting of the battery module 11 is guaranteed.

In this embodiment, the first direction X and the second direction Y are perpendicular, and the first direction X and the second direction Y may be in an intersecting state of 88 ° -89 ° due to an error in the machining process, which is not limited by the present utility model.

As shown in fig. 5, the lower case 12 further includes a reinforcing rod 123, the length direction of the reinforcing rod 123 is a first direction X, the reinforcing rod 123 is located in the mounting through hole, and both ends of the reinforcing rod 123 along the length direction thereof are connected with the frame 121. Specifically, the reinforcing rods 123 may be provided to reinforce the structural strength of the frame 121, so that the battery pack has good structural strength.

The lifting hole 1212 is formed in the outer side of the frame 121, and in practical application, the lifting device is matched with the lifting hole 1212 to carry the battery pack, namely, the lifting hole 1212 is arranged to enable the battery pack to have the characteristic of being convenient to carry.

Further, the frame 121 and the reinforcing rod 123 are integrally formed, specifically, the frame 121 and the reinforcing rod 123 are integrally formed by high-pressure casting, so that the number of processing steps can be reduced, and the processing efficiency can be improved.

In other embodiments, the frame 121 and the reinforcing rod 123 may be formed by welding, which is not limited in the present utility model.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. The utility model provides a battery package, its characterized in that includes battery package main part (1) and has thermal management board subassembly (2) of runner, holding tank (101) are seted up to the bottom surface of battery package main part (1), thermal management board subassembly (2) set up in holding tank (101) and with the tank bottom surface of holding tank (101) is connected, along the depth direction of holding tank (101), the length dimension of thermal management board subassembly (2) is not greater than the depth dimension of holding tank (101).

2. The battery pack according to claim 1, further comprising a thermally conductive connection layer (3), the thermally conductive connection layer (3) being disposed between the thermal management plate assembly (2) and the bottom surface of the receiving groove (101), and the thermally conductive connection layer (3) connecting the thermal management plate assembly (2) and the bottom surface of the receiving groove (101).

3. The battery pack according to claim 2, wherein the thermally conductive connection layer (3) is an aluminum-based solder layer.

4. The battery pack according to claim 1, wherein the thermal management plate assembly (2) comprises an inlet shunt tube (21), a first harmonica flow channel tube (22), a connecting flow channel tube (23), a second harmonica flow channel tube (24) and an outlet manifold (25), the inlet shunt tube (21) and the outlet manifold (25) are arranged in parallel, the inlet shunt tube (21) and the connecting flow channel tube (23) are arranged in parallel along a first direction (X), the first harmonica flow channel tube (22) and the second harmonica flow channel tube (24) are arranged in parallel, the first harmonica flow channel tube (22) connects the inlet shunt tube (21) and the connecting flow channel tube (23), the second harmonica flow channel tube (24) connects the connecting flow channel tube (23) and the outlet manifold (25), and the inlet shunt tube (21), the first harmonica flow channel tube (22), the connecting flow channel tube (23), the second harmonica flow channel tube (24) and the outlet manifold (25) cooperate to form a flow channel;

Wherein, the first harmonica runner pipe (22) and the second harmonica runner pipe (24) are connected with the bottom surface of the accommodating groove (101) along one end of the thickness direction.

5. The battery pack according to claim 1, wherein the battery pack main body (1) comprises a battery module (11), a lower case (12) and a cover body (13), the cover body (13) and the lower case (12) are connected and define a containing cavity (102), the battery module (11) is connected with the lower case (12), and the battery module (11) is located in the containing cavity (102), and the containing groove (101) is formed in the bottom surface of the lower case (12).

6. The battery pack according to claim 5, wherein the lower case (12) includes a frame (121) and a temperature equalizing bottom plate (122), the frame (121) has a mounting through hole, a bottom of the frame (121) has a supporting protruding rod (1211) extending along a first direction (X), both ends of the frame (121) along a second direction (Y) are provided with the supporting protruding rod (1211), the temperature equalizing bottom plate (122) is connected with a bottom surface of the frame (121) and covers the mounting through hole, the temperature equalizing bottom plate (122) is located between the two supporting protruding rods (1211), the supporting protruding rod (1211) and the temperature equalizing bottom plate (122) define the accommodating groove (101), and both ends of the accommodating groove (101) along the first direction (X) are open; the heat management plate assembly (2) is connected with the uniform temperature bottom plate (122);

The battery module (11) comprises a battery pack (111) and end plates (112), the end plates (112) are connected to the battery pack (111) along the two ends of the first direction (X), the end plates (112) are mounted on the frame (121), and the bottom surface of the battery pack (111) is connected with the uniform temperature bottom plate (122);

wherein the first direction (X) and the second direction (Y) are arranged to intersect.

7. The battery pack according to claim 6, wherein the lower case (12) further includes a reinforcing rod (123), a length direction of the reinforcing rod (123) is the first direction (X), the reinforcing rod (123) is located in the mounting through hole, and both ends of the reinforcing rod (123) along the length direction thereof are connected with the frame (121).

8. The battery pack according to claim 7, wherein the frame (121) and the reinforcing rod (123) are of an integral structure.

9. The battery pack according to claim 6, wherein a hanging hole (1212) is formed at the outer side of the frame (121).

10. An energy storage system comprising a battery pack according to any one of claims 1-9.