CN214043775U

CN214043775U - Battery box and battery package

Info

Publication number: CN214043775U
Application number: CN202023025990.4U
Authority: CN
Inventors: 谭舒
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-24
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses a battery box and battery package. The battery box body comprises a bottom plate, a cavity is arranged in the bottom plate, a heating assembly and a cooling channel are respectively arranged in the cavity, the heating assembly and the cooling channel are distributed at intervals, the heating assembly and the cooling channel are integrated with the bottom plate, the heating assembly seals the cavity, the cooling channel is formed by partition plates at intervals, and cooling liquid flows through the cooling channel. Encapsulate heating element inside the bottom plate, can hide heating element inside the bottom plate, stop the inside coolant liquid of cold liquid passageway and the possibility of heating element contact completely, guarantee heating element's insulation, waterproof and dustproof. Because heating element and cooling channel all integrate in hollow bottom plate, accomplish heating element and cooling channel when making the battery box and arrange and assemble, need not install hot plate and cooling tube additional in follow-up assembly battery box and battery module process, be favorable to simplifying the assembly process of battery package, improve the packaging efficiency of battery package.

Description

Battery box and battery package

Technical Field

The utility model relates to a battery technology field especially relates to a battery box and including battery package of this kind of battery box.

Background

In order to satisfy the use environments of different temperatures of batteries, some cooling and heating integrated battery packs are available on the market, and generally comprise: the box, the battery module, heating device and cooling device, heating device is including the hot plate that has PTC, cooling device includes that inside circulation has the tubular metal resonator of coolant liquid, cooling plate and tubular metal resonator contact with the battery module in the bottom of box through the fastener assembly respectively, the hot plate heats the battery module when ambient temperature is lower, when ambient temperature is higher, the inside liquid of tubular metal resonator cools down the battery module, in order to keep the normal operating temperature of battery, avoid low temperature or high temperature to influence the normal use of battery. The battery pack with the structure has the following defects that the heating plate and the metal pipe are arranged in a split mode and need to be assembled with the box body through the fastening piece respectively, so that the number of parts is large, the battery pack is complex in assembly, and the space utilization rate inside the battery pack is low and the assembly efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at: the battery box body integrates heating and cooling, and is beneficial to simplifying the assembly steps of a battery pack and improving the space utilization rate of the battery pack.

The utility model discloses another aim at: the battery pack is convenient to assemble and high in space interest rate.

In order to achieve the purpose, the utility model adopts the following technical proposal:

on the one hand, the battery box body comprises a bottom plate, a cavity is arranged in the bottom plate, a heating assembly and a cooling channel are respectively arranged in the cavity, the heating assembly and the cooling channel are distributed at intervals, the heating assembly and the cooling channel are integrated with the bottom plate into a whole, the heating assembly is sealed in the cavity, the cooling channel is formed by partition plates at intervals, and cooling liquid flows through the cooling channel.

As a preferable technical solution of the battery box, a sealed cavity is provided in the cavity, and the heating assembly is disposed in the sealed cavity.

As a preferable technical solution of the battery box, the number of the heating assemblies is at least two, all the heating assemblies are distributed at intervals along the width direction of the bottom plate, and the cooling channel is arranged between two adjacent heating assemblies.

As a preferable technical solution of the battery box, the battery box further includes a surrounding plate surrounding the periphery of the bottom plate, the surrounding plate is provided with a connector for connecting with an external power supply, and the connector is electrically connected with the heating assembly through a first lead.

As a preferable technical solution of the battery case, the heating assembly includes at least two PTC heaters, all the PTC heaters in the same heating assembly are connected in series, and all the PTC heaters in the same heating assembly are encapsulated by an insulating heat-conducting adhesive.

As a preferred technical solution of the battery box, the bottom plate is a rectangular parallelepiped structure, the bottom plate includes two first side plates and two second side plates, the two first side plates are distributed along a length direction of the bottom plate at intervals, the two second side plates are distributed along a width direction of the bottom plate at intervals, the partition plate extends along the length direction of the bottom plate, and the partition plate is distributed at least with one first side plate at intervals to form a passage opening for the coolant to pass through, and the seal cavity is distributed at least with one first side plate at intervals along the length direction of the bottom plate to form the passage opening.

As an optimal technical scheme of the battery box body, a liquid inlet joint and a liquid outlet joint are arranged on the same first side plate or the same second side plate, and the liquid inlet joint and the liquid outlet joint are communicated with the cooling channel.

As a preferable technical scheme of the battery box, the bottom plate is formed by extrusion molding of an aluminum profile.

On the other hand, still provide a battery package, including foretell battery box and set up in the battery module of battery box inside, the battery module hugs closely on the bottom plate of battery box.

As a preferable technical solution of the battery pack, a heat conducting sheet is disposed on one side surface of the bottom plate close to the battery module, and the battery module, the heat conducting sheet and the bottom plate are connected by a connecting member.

The utility model has the advantages that: because heating element and cooling channel all integrate in hollow bottom plate, accomplish heating element and cooling channel when making the battery box and arrange and assemble, need not install hot plate and cooling tube additional in follow-up assembly battery box and battery module process, be favorable to simplifying the assembly process of battery package to improve the packaging efficiency of battery package.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is an exploded view of a battery pack according to an embodiment.

Fig. 2 is a structural view of a battery case according to an embodiment (a top cover is not shown).

Fig. 3 is a sectional view of a battery pack according to an embodiment.

Fig. 4 is a cross-sectional view of a base plate according to an embodiment.

Fig. 5 is an enlarged view of a point a in fig. 1.

Fig. 6 is an enlarged view at B in fig. 3.

FIG. 7 is a schematic structural diagram of a heating assembly according to an embodiment.

In the figure:

1. a base plate; 101. a first side plate; 102. a second side plate; 2. enclosing plates; 3. a heating assembly; 301. a PTC heater; 302. insulating heat-conducting glue; 4. a cover plate; 5. a first conductive line; 6. a connector; 7. a cooling channel; 8. a liquid outlet joint; 9. a liquid inlet joint; 10. a heat conductive sheet; 11. a partition plate; 12. a passage port;

100. a battery module is provided.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 7, the present invention provides a battery case body applied to a battery pack. Wherein, the battery box includes bottom plate 1, bounding wall 2 and apron 4, and bounding wall 2 encloses the week portion of establishing at bottom plate 1, and bottom plate 1 and bounding wall 2 form the chamber that holds that is used for holding battery module 100, and apron 4 lid is established at the open end that holds the chamber to with battery module 100 shutoff in holding the intracavity. The inside of bottom plate 1 has the cavity, is provided with heating element 3 and cooling channel 7 in the cavity respectively, and heating element 3 and cooling channel 7 interval distribution, heating element 3 and cooling channel 7 all with bottom plate 1 integrated an organic whole, and heating element 3 seals in the cavity, and cooling channel 7 is formed by 11 intervals of baffle, and cooling channel 7 supplies the coolant liquid circulation.

Specifically, the heating component 3 realizes heat generation of the heating component 3 by electric heating. It can be understood that, the battery box outside is provided with the pump body, radiator and is used for the storage container of storage coolant liquid, cooling channel 7 respectively with the pump body and radiator intercommunication, the pump body is to the input coolant liquid in cooling channel 7, the coolant liquid of cooling channel 7 is discharged to the radiator in, the radiator is gone into and is saved in the storage container after cooling the coolant liquid to make the coolant liquid circulate in cooling channel 7, realize cooling the battery module 100 above bottom plate 1. Encapsulate heating element 3 in the cavity, can hide heating element 3 inside bottom plate 1, stop the inside coolant liquid of cold liquid passageway completely and the possibility of heating element 3 contact, guarantee heating element 3's insulation, waterproof and dustproof. In addition, because the cooling channel 7 is formed by the partition plates 11 at intervals, a cooling pipe for circulating cooling liquid does not need to be arranged on the bottom plate 1, the structures such as the cooling pipe and a component for fixing the cooling pipe are omitted, the manufacturing cost of the battery box is saved, and the space utilization rate inside the bottom plate 1 is improved. Because the heating component 3 and the cooling channel 7 are integrated in the hollow bottom plate 1, the arrangement and the assembly of the heating component 3 and the cooling channel 7 are completed when the battery box body is manufactured, and a heating plate and a cooling pipe do not need to be additionally arranged in the subsequent process of assembling the battery box body and the battery module 100, so that the assembly process of the battery pack is facilitated to be simplified, and the assembly efficiency of the battery pack is improved.

Specifically, a sealed cavity is provided in the cavity, and the heating assembly 3 is provided in the sealed cavity. The sealing cavity is arranged, so that the sealing reliability of the heating assembly 3 can be ensured.

In one embodiment, the number of the heating assemblies 3 is at least two, all the heating assemblies 3 are spaced apart along the width direction of the base plate 1, and a cooling channel 7 is provided between two adjacent heating assemblies 3. Set up two at least heating element 3, a greater number of heating element 3 are favorable to rapid heating up, can improve battery module 100 temperature in the short time. Since all the heating elements 3 are spaced apart in the width direction of the base plate 1, the temperature uniformity of the battery module 100 is improved by increasing the heating area of the battery module 100. In this embodiment, the number of the heating assemblies 3 is three, the three heating assemblies 3 are distributed at intervals along the width direction of the bottom plate 1, and the intervals between two adjacent heating assemblies 3 are equal. Of course, in other implementations, the number of the heating assemblies 3 can be flexibly designed according to the size of the bottom plate 1, for example, the number of the heating assemblies 3 is one, two, four, or five, and the like, wherein the distance between two adjacent heating assemblies 3 can also be flexibly changed according to the requirement.

Specifically, a connector 6 for connecting with an external power supply is arranged on the enclosing plate 2, and the connector 6 is electrically connected with the heating assembly 3 through a first lead 5. It will be appreciated that an external power source is connected to the connector 6 via a power cord to provide power to the heating assembly 3. The connector 6 is provided to facilitate connection of the heating assembly 3 to an external power source. Furthermore, the cavity wall of the sealed cavity is provided with a first wire passing hole for the first wire 5 to pass through, and a gap between the hole wall of the first wire passing hole and the first wire 5 is filled with sealant, so that the sealing performance of the sealed cavity is ensured. Wherein, the bottom plate 1 is provided with the second near connector 6 one end and crosses the line hole, and first wire 5 crosses the second by the inside of bottom plate 1 and crosses the line hole and extend to the top of bottom plate 1 to make first wire 5 be connected with connector 6. And a gap between the hole wall of the second wire passing hole and the first lead 5 is filled with sealant to block a gap between the second wire passing hole and the first lead 5.

In another embodiment, the heating assembly 3 includes at least two PTC heaters 301, PTC (positive Temperature coefficient) heaters, all the PTC heaters 301 in the same heating assembly 3 are connected in series by a second conductive wire (not shown), and all the PTC heaters 301 in the same heating assembly 3 are encapsulated by an insulating heat-conducting adhesive 302, and the second conductive wire is encapsulated inside the heat-conducting adhesive. Specifically, the insulating and thermally conductive adhesive 302 is a silicone adhesive. In this embodiment, all the PTC heaters 301 in the same heating assembly 3 are distributed at intervals along the length direction of the bottom plate 1, and insulating sealant is encapsulated between two adjacent PTC heaters 301 and the periphery of each PTC heater 301, so that the entire heating assembly 3 is in a rectangular parallelepiped structure. The heat generated from the PTC heaters 301 is transferred to the battery module 100 of the base plate 1 through the insulating sealant. In order to further improve the heating efficiency of the heating unit 3, the insulating heat conductive paste 302 located around the PTC heater 301 is closely attached to the cavity wall of the cavity. As shown in fig. 1, the X direction in the figure is the width direction of the base plate 1, and the Y direction in the figure is the length direction of the base plate 1.

Specifically, the bottom plate 1 is a rectangular parallelepiped structure, the bottom plate 1 includes two first side plates 101 and two second side plates 102, the two first side plates 101 are distributed along the length direction of the bottom plate 1 at intervals, the two second side plates 102 are distributed along the width direction of the bottom plate 1 at intervals, the partition plate 11 extends along the length direction of the bottom plate 1, the partition plate 11 is distributed at intervals with at least one first side plate 101 to form a passage opening 12 for passing through of the cooling liquid, and the seal cavity is distributed at intervals with at least one first side plate 101 along the length direction of the bottom plate 1 to form the passage opening 12. It can be understood that, a plurality of vertically arranged partition plates 11 are provided inside the bottom plate 1, the length direction of each partition plate 11 is parallel to the length direction of the bottom plate 1, all the partition plates 11 are respectively distributed at intervals along the width direction of the bottom plate 1, cooling channels 7 are formed between two adjacent partition plates 11, between a partition plate 11 and a second partition plate 11, and between a partition plate 11 and a sealed cavity, and the cooling channels 7 are communicated through channel openings 12 to form channels with a circuitous structure.

Further, a liquid inlet joint 9 and a liquid outlet joint 8 are arranged on the same first side plate 101 or the same second side plate 102, and the liquid inlet joint 9 and the liquid outlet joint 8 are communicated with the cooling channel 7. It will be appreciated that the outlet connection 8 communicates with the radiator via a line and the inlet connection 9 communicates with the pump via a line. The liquid inlet joint 9 and the liquid outlet joint 8 are arranged on the same side plate, so that the arrangement of pipelines is facilitated, and the length of the pipelines is favorably shortened. As shown in fig. 4, the arrows in the drawing indicate the flow direction of the coolant. The cooling liquid enters the cooling channel 7 from the liquid inlet joint 9, flows to the liquid outlet joint 8 along the extension direction of the cooling channel 7, and is discharged to the outside of the bottom plate 1 from the liquid outlet joint 8.

In this embodiment, bottom plate 1 is by aluminium alloy extrusion, and the aluminium alloy has good heat conductivility, guarantees bottom plate 1 and the high efficiency at battery module 100 heat transfer. Preferably, the coaming 2 and the cover plate 4 are formed by extrusion of aluminum profiles, and the overall weight of the battery box body is reduced by utilizing the characteristic of light weight of the aluminum profiles.

In one embodiment, a battery pack is further provided, which includes the battery box of any of the above embodiments and a battery module 100 disposed inside the battery box, wherein the battery module 100 is tightly attached to the bottom plate 1 of the battery box. This kind of battery package encapsulates heating element 3 inside bottom plate 1 in advance, is favorable to simplifying the process of battery package encapsulation, improves the efficiency of battery package encapsulation.

In order to improve the thermal conductivity between the base plate 1 and the battery module 100, a thermal conductive sheet 10 is disposed on one side surface of the base plate 1 close to the battery module 100, and the battery module 100, the thermal conductive sheet 10 and the base plate 1 are connected by a connecting member. Specifically, the heat conductive sheet 10 is spread over the upper surface of the base plate 1. Connect battery module 100, conducting strip 10 and bottom plate 1 through the connecting piece, on the one hand, make battery module 100, conducting strip 10 and the 1 three of bottom plate closely laminate, reduce the heat and scatter and disappear to improve the efficiency of the heating or the cooling of battery module 100, on the other hand, with battery module 100 relatively fixed at bottom plate 1, prevent that battery module 100 from removing on bottom plate 1, strengthen the crashworthiness and the anti vibration of battery box, improve the reliability of battery package. Preferably, the heat conducting sheet 10 is adhered to the bottom plate 1, and during the specific assembly, the heat conducting sheet 10 is firstly adhered to the upper surface of the bottom plate 1, the battery module 100 is placed on the heat conducting sheet 10 after the heat conducting sheet 10 is positioned on the bottom plate 1, and then the battery module 100, the heat conducting sheet 10 and the bottom plate 1 are fixedly connected by using the connecting member. Specifically, the connecting members are connecting screws, and the battery module 100, the heat-conducting sheet 10 and the bottom plate 1 are connected by the connecting screws, so that the battery module 100 and the bottom plate 1 can be conveniently disassembled and assembled.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, which are used for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a battery box, its characterized in that, includes the bottom plate, the inside of bottom plate has the cavity, be provided with heating element and cooling channel in the cavity respectively, heating element with cooling channel interval distribution, heating element and cooling channel all with the bottom plate is integrated as an organic whole, heating element seals in the cavity, cooling channel is formed by the baffle interval, cooling channel supplies the coolant liquid circulation.

2. The battery box body as claimed in claim 1, wherein a sealed cavity is provided in the cavity, and the heating assembly is provided in the sealed cavity.

3. The battery box body as claimed in claim 1, wherein the number of the heating assemblies is at least two, all the heating assemblies are spaced apart along the width direction of the bottom plate, and the cooling channel is provided between two adjacent heating assemblies.

4. The battery box body as claimed in claim 3, further comprising a surrounding plate surrounding the periphery of the bottom plate, wherein a connector for connecting with an external power supply is arranged on the surrounding plate, and the connector is electrically connected with the heating assembly through a first lead.

5. The battery case according to claim 1, wherein the heating assembly includes at least two PTC heaters, all of the PTC heaters in the same heating assembly are connected in series, and all of the PTC heaters in the same heating assembly are encapsulated by an insulating heat conductive paste.

6. The battery box body as claimed in claim 2, wherein the bottom plate is a rectangular parallelepiped structure, the bottom plate includes two first side plates and two second side plates, the two first side plates are spaced apart along a length direction of the bottom plate, the two second side plates are spaced apart along a width direction of the bottom plate, the partition extends along the length direction of the bottom plate, the partition is spaced apart from at least one first side plate to form a passage opening for the cooling liquid to pass through, and the seal cavity is spaced apart from at least one first side plate along the length direction of the bottom plate to form the passage opening.

7. The battery box body as claimed in claim 6, wherein a liquid inlet joint and a liquid outlet joint are arranged on the same first side plate or the same second side plate, and the liquid inlet joint and the liquid outlet joint are communicated with the cooling channel.

8. The battery case according to any one of claims 1 to 7, wherein the bottom plate is extruded from an aluminum profile.

9. A battery pack, comprising the battery case according to any one of claims 1 to 8 and a battery module disposed inside the battery case, wherein the battery module is closely attached to a bottom plate of the battery case.

10. The battery pack according to claim 9, wherein a heat conductive sheet is provided on a side of the base plate adjacent to the battery module, and the battery module, the heat conductive sheet, and the base plate are connected by a connecting member.