CN212571173U - Battery box - Google Patents

Abstract

The utility model provides a battery box, which comprises an electric core, a heating film and a liquid cooling plate, wherein the heating film is arranged below a plurality of electric cores and comprises a lower insulating layer, an upper insulating layer and a heating component, the upper insulating layer is arranged above the lower insulating layer, and the heating component is positioned between the upper insulating layer and the lower insulating layer; the liquid cooling plate is arranged below the heating film and comprises an upper plate body and a lower plate body which are connected with each other, and a cooling channel is arranged between the upper plate body and the lower plate body; wherein, the lower insulating layer is matched with the upper plate body. By adopting the scheme, the heating film and the liquid cooling plate are arranged below the battery core, the heating film can be adopted for heating at low temperature, the liquid cooling plate can be adopted for heat dissipation at high temperature, the heating film can be used for heat transfer of the battery core and the liquid cooling plate during heat dissipation, and a heat conduction structure is not required to be arranged. Therefore, the scheme has good temperature control effect on the battery box, and has compact structure and low cost.

Description

Battery box

Technical Field

The utility model relates to a battery box technical field particularly, relates to a battery box.

Background

The lithium ion battery gradually becomes a main energy carrier in the field of new energy with excellent charge and discharge performance, but the use of the lithium ion battery is severely limited due to the temperature sensitivity of the lithium ion battery, and a proper working environment must be created to ensure that the battery works in the optimal working temperature range and exert the optimal working state and performance of the battery. The existing battery box has poor temperature control effect and needs to be further optimized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery box to improve the temperature control effect of battery box.

In order to achieve the above object, the utility model provides a battery box, include: a plurality of arranged battery cores; the heating film is arranged below the plurality of battery cores and comprises a lower insulating layer, an upper insulating layer and a heating part, the upper insulating layer is arranged above the lower insulating layer, and the heating part is positioned between the upper insulating layer and the lower insulating layer; the liquid cooling plate is arranged below the heating film and comprises an upper plate body and a lower plate body which are connected with each other, and a cooling channel is arranged between the upper plate body and the lower plate body; wherein, the lower insulating layer is matched with the upper plate body.

Further, the upper side of the upper plate body is provided with a recessed area, and the lower insulating layer is arranged in the recessed area.

Further, the lower insulating layer comprises a connecting strip and a plurality of insulating strips arranged at intervals, and the insulating strips are connected through the connecting strip; the sunken area includes the recess that a plurality of intervals set up, and is a plurality of the insulating strip one-to-one sets up in a plurality of the recess.

Further, the heating part is matched with the lower insulating layer in shape, and the battery box further comprises a cable connector which is connected with the heating part.

Further, go up the plate body and include the body and set up protruding muscle on the body, the orientation of protruding muscle one side of plate body has the subchannel down, protruding muscle is a plurality of, and is a plurality of protruding muscle is arranged and is set up on the body, and is a plurality of the subchannel of protruding muscle communicates in proper order in order to form cooling channel, the periphery of body with the periphery sealing connection of plate body down.

Further, a groove is formed between every two adjacent ribs on the upper side of the body, and the groove is used for accommodating at least part of the structure of the lower insulating layer.

Further, the upper insulating layer is of a flat plate-shaped structure, and the upper surfaces of the plurality of ribs are abutted to the upper insulating layer.

Further, the battery box still includes water supply connector and water connectors, water supply connector with cooling channel's access connection, water connectors with cooling channel's exit linkage.

Further, the lower insulating layer and the upper insulating layer are made of an elastic material.

Further, the battery box also comprises a shell, and the battery core, the heating film and the liquid cooling plate are all arranged in the shell.

The technical scheme of the utility model is applied to provide a battery box, the battery box comprises electric cores, a heating film and a liquid cooling plate, the heating film is arranged below the electric cores and comprises a lower insulating layer, an upper insulating layer and a heating component, the upper insulating layer is arranged above the lower insulating layer, and the heating component is positioned between the upper insulating layer and the lower insulating layer; the liquid cooling plate is arranged below the heating film and comprises an upper plate body and a lower plate body which are connected with each other, and a cooling channel is arranged between the upper plate body and the lower plate body; wherein, the lower insulating layer is matched with the upper plate body. By adopting the scheme, the heating film and the liquid cooling plate are arranged below the battery core, the heating film can be adopted for heating at low temperature, the liquid cooling plate can be adopted for heat dissipation at high temperature, the heating film can be used for heat transfer of the battery core and the liquid cooling plate during heat dissipation, and a heat conduction structure is not required to be arranged. Therefore, the scheme has good temperature control effect on the battery box, and has compact structure and low cost.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a battery box provided by an embodiment of the present invention;

FIG. 2 shows an assembly view of the heating membrane and the liquid-cooled panel of FIG. 1;

FIG. 3 shows a schematic view of the heating film of FIG. 1;

fig. 4 shows a schematic view of the liquid-cooled panel of fig. 1.

Wherein the figures include the following reference numerals:

10. an electric core; 20. heating the film; 21. a lower insulating layer; 22. an upper insulating layer; 23. a connecting strip; 24. an insulating strip; 30. a liquid-cooled plate; 31. an upper plate body; 32. a lower plate body; 33. a groove; 41. a cable joint; 51. a water inlet joint; 52. and a water outlet joint.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in the drawings, embodiments of the present invention provide a battery box, including: a plurality of cells 10 arranged in an array; the heating film 20 is arranged below the plurality of battery cells 10, the heating film 20 comprises a lower insulating layer 21, an upper insulating layer 22 and a heating component, the upper insulating layer 22 is arranged above the lower insulating layer 21, and the heating component is positioned between the upper insulating layer 22 and the lower insulating layer 21; the liquid cooling plate 30 is arranged below the heating film 20, the liquid cooling plate 30 comprises an upper plate body 31 and a lower plate body 32 which are connected with each other, and a cooling channel is arranged between the upper plate body 31 and the lower plate body 32; wherein the lower insulating layer 21 is fitted with the upper plate body 31.

The technical scheme of the utility model is applied, a battery box is provided, the battery box comprises a plurality of battery cores 10, a heating film 20 and a liquid cooling plate 30, the heating film 20 is arranged below the plurality of battery cores 10, the heating film 20 comprises a lower insulating layer 21, an upper insulating layer 22 and a heating component, the upper insulating layer 22 is arranged above the lower insulating layer 21, and the heating component is positioned between the upper insulating layer 22 and the lower insulating layer 21; the liquid cooling plate 30 is arranged below the heating film 20, the liquid cooling plate 30 comprises an upper plate body 31 and a lower plate body 32 which are connected with each other, and a cooling channel is arranged between the upper plate body 31 and the lower plate body 32; wherein the lower insulating layer 21 is fitted with the upper plate body 31. Adopt this scheme, all set up the below at electric core 10 with heating film 20 and liquid cooling plate 30, can adopt heating film 20 heating during the low temperature, can adopt liquid cooling plate 30 heat dissipation during the high temperature, and when the heat dissipation, heating film 20 can be used to electric core 10 and liquid cooling plate 30's heat transfer, need not to set up the heat conduction structure again. Therefore, the scheme has good temperature control effect on the battery box, and has compact structure and low cost.

In the present embodiment, the upper side of the upper plate body 31 has a recessed region in which the lower insulating layer 21 is disposed. By adopting the scheme, the compactness of the battery box can be improved, and the volume of the battery box is reduced.

In the present embodiment, the lower insulation layer 21 includes a connection bar 23 and a plurality of insulation bars 24 arranged at intervals, and the plurality of insulation bars 24 are connected by the connection bar 23; the recessed region includes a plurality of grooves 33 arranged at intervals, and the plurality of insulation strips 24 are arranged in the plurality of grooves 33 in a one-to-one correspondence. With this arrangement, the shape of the lower insulating layer 21 can be matched to the plurality of grooves 33 so that the lower insulating layer 21 is disposed in the grooves 33.

In this embodiment, the heating member is shaped to match the lower insulating layer 21, and the battery box further includes a cable connector 41, and the cable connector 41 is connected to the heating member. This facilitates the arrangement of the heating member between the lower insulating layer 21 and the upper insulating layer 22. The electrical connection to the circuit is facilitated by the provision of the cable connector 41.

In this embodiment, the upper plate body 31 includes the body and sets up the protruding muscle on the body, and the one side of the body 32 has a sub-channel down in the orientation of protruding muscle, and the protruding muscle is a plurality of, and a plurality of protruding muscle are arranged and are set up on the body, and the sub-channel of a plurality of protruding muscle communicates in proper order in order to form cooling channel, the periphery of body and the peripheral sealing connection of the body 32 down. By providing the ribs, it is possible to facilitate the formation of the cooling passage between the lower plate body 32 and the upper plate body 31.

Further, on the upper side of the body, a groove 33 is formed between two adjacent ribs, and the groove 33 is used for accommodating at least a part of the structure of the lower insulating layer 21. At least a portion of the structure of the lower insulating layer 21 can be accommodated by the area between the ribs, which results in a compact structure, a small volume, and good thermal conductivity.

In the present embodiment, the upper insulating layer 22 has a flat plate-like structure, and the upper surfaces of the plurality of ribs are in contact with the upper insulating layer 22. The upper insulating layer 22 is set to be a flat structure, so that each battery cell 10 can be in contact with the upper insulating layer 22, and the heat exchange effect is improved.

In this embodiment, the battery box further includes a water inlet connector 51 and a water outlet connector 52, the water inlet connector 51 is connected to the inlet of the cooling channel, and the water outlet connector 52 is connected to the outlet of the cooling channel. By providing the water inlet connector 51 and the water outlet connector 52, a flowing path is formed by connecting the pipelines, so that cooling by liquid is realized.

In the present embodiment, the lower insulating layer 21 and the upper insulating layer 22 are made of an elastic material. By adopting an elastic material, the lower insulating layer 21 and the upper insulating layer 22 can be elastically deformed after being extruded by the liquid cooling plate 30 and the battery cell 10, so that the battery cell can be fully contacted with the liquid cooling plate 30 and the battery cell 10, and the heat exchange efficiency and the temperature uniformity of different positions of the battery box are improved.

Further, the battery box further comprises a housing, and the plurality of battery cells 10, the heating film 20 and the liquid cooling plate 30 are all disposed in the housing. This provides protection from the housing and facilitates the arrangement of multiple components.

Both sides are the characteristic of insulating elasticity material about this scheme rational utilization heating film, replace heat conduction silica gel pad between liquid cooling board and the electric core module with the heating film, have saved the heat-conducting medium between electric core and the liquid cooling board, moreover rational utilization electric core structural feature, along the principle that electric core inside diaphragm direction thermal conductivity can the best, all rational arrangement is in electric core bottom to heat dissipation and heating, can adopt the heating film heating during low temperature, and the heat dissipation of high temperature liquid cooling board during. The whole structure is compact in design, low in cost, light in weight and high in reliability.

By adopting the structure, the heating film is arranged on the surface of the liquid cooling plate at the bottom of the electric core, the double layers of the gravity of the electric core and the supporting force of the liquid cooling plate are clamped tightly, the contact between the heating film and the electric core and between the liquid cooling plates is good, and the heat source can be ensured to be reliably transmitted between the electric core and the liquid cooling plates and between the heating film effectively and efficiently.

To facilitate understanding of the present solution, the following is further described.

1. The liquid cooling plate is processed by adopting a plate forming process, and a runner which meets the flowing requirement of cooling liquid is processed on an upper plate (namely an upper plate body) of the liquid cooling plate and is welded with a lower plate (namely a lower plate body) to form the liquid cooling plate which can ensure the stable flowing of the cooling liquid.

2. The flow channel of the liquid cooling plate is parallel to the module, and the groove on the liquid cooling plate is ensured to have enough space for accommodating the heating part of the heating film.

3. The flow channel (namely the cooling channel) of the liquid cooling plate is parallel to the module, the surface grooves are communicated with each other, the heating film heating parts accommodated in the liquid cooling plate can be continuously connected with each other, external devices are not needed for connection, and the cost and the space of a connected wire harness and a joint are saved.

4. The heating film is composed of two layers of insulating films (namely a lower insulating layer and an upper insulating layer) with certain heat conduction capacity and a heating component, wherein the lower insulating film adopts a discontinuous mode, the upper insulating film is a layer of insulating film which can completely cover the liquid cooling plate, and the two layers of insulating films have certain elasticity and shearing resistance capacity. The heating element inside the heating film is arranged between the upper and lower insulating films.

5. The shape of the lower insulating film of the heating film is matched with the upper groove of the liquid cooling plate, so that the lower insulating film of the heating film can be perfectly combined together and is completely accommodated in the groove of the liquid cooling plate.

6. The electric core is arranged on the upper insulating layer of the heating film, and the insulating film has certain heat conductivity, so that the heat generated by the electric core can be stably transmitted to the liquid cooling plate through the heating film, and the heat is dissipated through the cooling liquid in the liquid cooling plate.

7. The heating film has certain elasticity and anti-shearing capability, and can ensure that the battery cell is not damaged in the vibration and impact process.

8. The heating part in the heating film is arranged between the insulating films and is accommodated in the groove of the liquid cooling plate, and under the condition that the heating film is locally damaged, the compression thickness of the heating film supports the heating film, so that the insulation protection can be realized between the battery core and the heating part, and the problem of insulation failure is avoided.

9. The heating film and the liquid cooling plate flow passages are mutually staggered, and the size and the interval of the heating film and the liquid cooling plate flow passages are adjusted according to the size and the heat productivity of the battery cell.

10. After the bottom heating, the side heating mode in the ordinary design can be removed, and the cost is expected to be reduced by about 10%.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

Claims (10)

1. A battery box, comprising:

a plurality of arranged battery cells (10);

a heating film (20), the heating film (20) being disposed below the plurality of battery cells (10), the heating film (20) including a lower insulating layer (21), an upper insulating layer (22), and a heating member, the upper insulating layer (22) being disposed above the lower insulating layer (21), the heating member being located between the upper insulating layer (22) and the lower insulating layer (21);

the liquid cooling plate (30) is arranged below the heating film (20), the liquid cooling plate (30) comprises an upper plate body (31) and a lower plate body (32) which are connected with each other, and a cooling channel is arranged between the upper plate body (31) and the lower plate body (32);

wherein the lower insulating layer (21) is matched with the upper plate body (31).

2. The battery box according to claim 1, wherein the upper side of the upper plate body (31) has a recessed area in which the lower insulating layer (21) is disposed.

3. The battery box according to claim 2,

the lower insulating layer (21) comprises a connecting strip (23) and a plurality of insulating strips (24) arranged at intervals, and the insulating strips (24) are connected through the connecting strip (23);

the depressed area comprises a plurality of grooves (33) arranged at intervals, and the insulating strips (24) are arranged in the grooves (33) in a one-to-one correspondence mode.

4. A battery box according to claim 3, characterized in that the heating element is shaped to match the lower insulating layer (21), the battery box further comprising a cable connector (41), the cable connector (41) being connected to the heating element.

5. The battery box according to claim 1, wherein the upper plate (31) comprises a body and a plurality of ribs arranged on the body, a sub-channel is arranged on one side of each rib facing the lower plate (32), the plurality of ribs are arranged on the body, the sub-channels of the plurality of ribs are sequentially communicated to form the cooling channel, and the periphery of the body is hermetically connected with the periphery of the lower plate (32).

6. A battery box according to claim 5, characterized in that on the upper side of the body, between two adjacent ribs there is a groove (33), which groove (33) is intended to receive at least part of the structure of the lower insulating layer (21).

7. The battery box according to claim 5, wherein the upper insulating layer (22) has a flat plate-like structure, and upper surfaces of the plurality of ribs abut against the upper insulating layer (22).

8. The battery box according to claim 1, characterized in that, the battery box further comprises a water inlet connector (51) and a water outlet connector (52), the water inlet connector (51) is connected with the inlet of the cooling channel, and the water outlet connector (52) is connected with the outlet of the cooling channel.

9. The battery case according to claim 1, characterized in that the lower insulating layer (21) and the upper insulating layer (22) are made of an elastic material.

10. The battery box according to claim 1, characterized in that the battery box further comprises a housing, and the plurality of cells (10), the heating film (20), and the liquid-cooled plate (30) are all disposed within the housing.

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