CN217134479U - Battery module, battery package and electric vehicle - Google Patents
Battery module, battery package and electric vehicle Download PDFInfo
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- CN217134479U CN217134479U CN202123323685.8U CN202123323685U CN217134479U CN 217134479 U CN217134479 U CN 217134479U CN 202123323685 U CN202123323685 U CN 202123323685U CN 217134479 U CN217134479 U CN 217134479U
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Abstract
The utility model discloses a battery module, battery package and electric vehicle. The battery module comprises at least two batteries; at least one heat conduction layer is clamped between two adjacent batteries; the heat conduction coefficient of the heat conduction layer is not less than 3W/MK. In the battery module provided by the utility model, a heat conduction layer is arranged between the adjacent batteries, and the heat conduction coefficient of the heat conduction layer is not less than 3W/MK, thereby utilizing the high heat conduction performance of the heat conduction layer; when a certain battery is subjected to thermal runaway temperature rise, the heat conducting layer can rapidly transfer heat of the battery out, so that heat dissipation is accelerated, and heat is restrained from spreading among the batteries.
Description
Technical Field
The utility model relates to an energy storage equipment technical field, more specifically relates to a battery module, battery package and electric vehicle.
Background
With the increasing promotion of new energy automobiles in China, the pure electric automobile with the characteristics of green and environmental protection becomes the inevitable trend of the development of the automobile industry in the future, and the pure electric automobile gradually replaces the traditional fuel passenger car to become a common daily travel vehicle. The power source of the electric automobile is a lithium battery pack, and as an important component part of the electric automobile, the improvement of various performances of the lithium battery pack is always a key point of attention in the industry.
A lithium battery pack generally includes a plurality of unit cells, which are closely arranged together; since the vehicle inevitably has certain vibration, collision, extrusion and the like in the using process, thermal runaway of a certain or some single batteries in the lithium battery pack can be caused. Under the condition, the single battery with thermal runaway can quickly transfer heat to the surrounding single batteries, so that a large amount of single batteries are subjected to interlocking thermal runaway, a battery pack is further ignited and even explodes, and the safety of drivers and passengers is seriously threatened.
At present, the way of delaying thermal diffusion of a lithium battery pack in the prior art is generally to arrange a heat-insulating material between single batteries, however, the effect of inhibiting heat transfer is very limited, and the safety performance of the lithium battery pack cannot be effectively improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery module, battery package and electric vehicle's new technical scheme to the battery package among the solution prior art can't effectively restrain the technical problem that the heat propagated between the battery.
According to the utility model discloses a first aspect provides a battery module, and this battery module includes:
at least two batteries;
at least one heat conduction layer is clamped between two adjacent batteries; the heat conduction coefficient of the heat conduction layer is not less than 3W/MK.
Optionally, at least one thermal insulation layer is further disposed between two adjacent batteries.
Optionally, the number of the heat conduction layers is two, the number of the thermal insulation layers is one, and the thermal insulation layer is clamped between the two heat conduction layers.
Optionally, the number of the heat insulation layers is two, the number of the heat conduction layers is one, and the heat conduction layer is clamped between the two heat insulation layers.
Optionally, the heat conduction layer and the heat insulation layer which are adjacently arranged are connected by bonding or welding.
Optionally, the heat conducting layer and the heat insulating layer which are adjacently arranged are in contact with each other.
Optionally, the thermal conductivity of the thermal insulation layer is not greater than 0.5W/MK.
Optionally, the heat conduction layer is made of a heat conduction material.
Optionally, the heat insulation layer is made of aerogel, polyurethane, rubber, rock wool, a polystyrene board, glass fibers, pre-oxidized fibers or an air layer.
According to a second aspect of the present invention, there is provided a battery pack, comprising a tray and the battery module according to the first aspect; at least one heat conduction layer is arranged between the edge beam of the tray and the battery module.
According to a third aspect of the present invention, there is provided an electric vehicle including the battery pack according to the second aspect.
The utility model discloses a technical scheme can reach following beneficial effect:
in the battery module provided by the utility model, a heat conduction layer is arranged between the adjacent batteries, and the heat conduction coefficient of the heat conduction layer is not less than 3W/MK, thereby utilizing the high heat conduction performance of the heat conduction layer; when a certain battery is subjected to thermal runaway temperature rise, the heat conducting layer can rapidly transfer heat of the battery out, so that heat dissipation is accelerated, and heat is restrained from spreading among the batteries.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view illustrating an overall structure of a battery module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an overall structure of a battery module according to an embodiment of the present invention;
fig. 3 is a schematic view showing the overall structure of a battery module according to an embodiment of the present invention;
fig. 4 is an exploded view schematically illustrating a battery module according to an embodiment of the present invention.
Description of reference numerals:
1. a battery; 2. a heat conductive layer; 3. an insulating layer.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: 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.
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.
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 exemplary only and not as 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.
Referring to fig. 1 to 4, according to an embodiment of the present invention, a battery module is provided. The battery module comprises at least two batteries 1; at least one heat conduction layer 2 is clamped between two adjacent batteries 1; the heat conduction coefficient of the heat conduction layer 2 is not less than 3W/MK.
The embodiment of the utility model provides an among the battery module, be provided with heat-conducting layer 2 between the battery 1 of adjacent setting to heat-conducting layer 2's coefficient of heat conduction is not less than 3W/MK. When a thermal runaway occurs in a certain battery 1 due to a needle stick, local heating, or the like, as shown in fig. 1, for example, a local thermal runaway occurs in the battery 1 provided below in fig. 1, and as shown in fig. 2, the position where the thermal runaway occurs may be a position a located at the center of the battery in fig. 2 or may be a position at the edge of the battery. The temperature at the position a where thermal runaway occurs rapidly increases and rapidly reaches a higher temperature. In this case, the heat conducting layer 2 may rapidly transfer the heat of the battery 1, for example, a heat sink may be provided, and the heat sink is connected to the heat conducting layer 2, so that the heat conducting layer 2 can rapidly transfer the heat of the battery 1 to the heat sink, thereby accelerating the heat dissipation and suppressing the heat from spreading between the batteries.
In one embodiment, at least one thermal insulation layer 3 is further disposed between two adjacent batteries 1.
In this specific example, not only the heat conductive layer 2 but also the heat insulating layer 3 are provided between the two batteries 1 disposed adjacent to each other; when a certain battery 1 is out of thermal runaway due to the situations of needling, local heating and the like, the heat insulation layer 3 can isolate the heat of the battery 1, and the heat of the battery 1 is prevented from being transferred to other batteries 1 which are arranged adjacent to the battery 1.
Further specifically, if the battery 1 at the upper side in fig. 1 has a local thermal runaway, the temperature at the thermal runaway position increases rapidly and reaches a higher temperature rapidly, and after the heat passes through the heat insulating layer 3, the heat conductive layer 2 performs temperature homogenization, so that the temperature of the battery 1 below where the thermal runaway does not occur does not rise, or the temperature of the battery 1 below where the thermal runaway does not occur drops rapidly after rising, thereby suppressing the thermal runaway of the battery 1 below.
In the prior art, in order to improve the heat insulation effect between batteries, a mode of increasing the thickness of a heat insulation material is generally adopted; however, the heat insulating material having a relatively thick thickness may reduce space utilization in the battery module and the battery pack. The embodiment of the utility model provides an among the battery module, combine together thermal insulation material and heat conduction material, not only utilized thermal insulation material's heat-proof quality to utilized the high heat conductivility of heat conduction material, with the heat homogenization after the battery thermal runaway, reduce the highest temperature after the thermal runaway, can effectively restrain the heat to other battery diffusion on taking place thermal runaway's battery next door, reduce the heat of battery after the thermal runaway and carry out the risk of transmitting to near battery or module, improve space utilization.
In one embodiment, further, the number of the heat conduction layers 2 is two, the number of the thermal insulation layers 3 is one, and the thermal insulation layer 3 is sandwiched between the two heat conduction layers 2.
In this particular example, the heat conductive layers 2 are provided in two layers, with two heat conductive layers 2 at the outer layer and the heat insulating layer 3 between the two heat conductive layers 2. In the arrangement mode of the embodiment, the heat conduction layer 2 is directly contacted with the battery 1, when a certain battery 1 is out of control thermally, the temperature of the battery 1 is rapidly increased and rapidly reaches a higher temperature, the heat emitted by the battery can be subjected to heat and temperature homogenization through the heat conduction layer 2 directly connected with the battery 1, and the heat conduction layer 2 can rapidly transfer the heat emitted by the battery to the heat dissipation part; meanwhile, the heat insulation layer 3 arranged between the two heat conduction layers 2 can reduce heat transfer between the adjacent batteries 1, even if a small amount of heat is transferred, the temperature can be homogenized through the other heat conduction layer 2 far away from the thermal runaway battery, so that even if the temperature of the adjacent batteries 1 rises, the temperature can be quickly reduced, the adjacent batteries 1 are protected, and the thermal runaway of the adjacent batteries 1 is avoided.
In one embodiment, further, the number of the thermal insulation layers 3 is two, the number of the heat conduction layers 2 is one, and the heat conduction layers 2 are sandwiched between the two thermal insulation layers 3.
In this particular example, the thermally insulating layer 3 is provided in two layers, with two thermally insulating layers 3 at the outer layer and the thermally conductive layer 2 between the two thermally insulating layers 3. In the mode of setting of this embodiment, insulating layer 3 directly contacts with battery 1, when certain battery 1 takes place the thermal runaway, this battery 1's temperature increases fast, and reach higher temperature rapidly, the heat that it sent can insulate against heat through the insulating layer 3 with this battery 1 lug connection, a small amount of heat that sends after insulating against heat can carry out heat and temperature homogenization through heat-conducting layer 2, the local high temperature of thermal runaway position is reduced and the homogenization, another layer of insulating layer 3 of keeping away from the thermal runaway battery is thermal-insulated again, the temperature of adjacent battery 1 can not rise, or can lower the temperature soon after rising, thereby adjacent battery 1 has been restrained and has taken place the thermal runaway.
In one embodiment, the heat conductive layer 2 and the heat insulating layer 3 are bonded or welded.
In this specific example, the adjacent heat conduction layers 2 and the heat insulation layers 3 are bonded by an adhesive or welded, so that the adjacent heat conduction layers 2 and the heat insulation layers 3 are firmly and reliably connected, and the heat conduction layers 2 and the heat insulation layers 3 can be effectively prevented from moving and being dislocated.
In one embodiment, further, contact is provided between the heat conductive layer 2 and the heat insulating layer 3 which are adjacently arranged.
In this specific example, the adjacent heat conductive layers 2 and heat insulating layers 3 are simply and easily disposed in a stacked contact manner without performing a special connection fixing process.
In one embodiment, further, the thermal conductivity of the thermal insulation layer 3 is not more than 0.5W/MK.
In this particular example, the thermal barrier layer 3 is made of a material having a thermal conductivity of not more than 0.5W/MK, which ensures good thermal insulation of the thermal barrier layer 3.
In one embodiment, the heat conducting layer 2 is made of a heat conducting material. Further specifically, the thermally conductive material comprises at least one of graphene, graphite, carbon fiber, silicon, aluminum, or silicon carbide.
Specifically, when more than two heat conduction layers 2 are arranged, the same material may be selected, for example, graphene is selected for each of the more than two heat conduction layers 2; different materials can also be selected for use, for example, when two heat conduction layers 2 are arranged, graphene is selected for use as one heat conduction layer 2, and graphite is selected for use as the other heat conduction layer 2.
In one embodiment, the material of the thermal insulation layer 3 is aerogel, polyurethane, rubber, rock wool, polystyrene board, glass fiber, pre-oxidized fiber, or an air layer.
Specifically, when more than two heat insulation layers 3 are arranged, the same material may be selected, for example, rubber is used for each of the more than two heat insulation layers 3; different materials can also be selected, for example, when two heat insulation layers 3 are arranged, one heat insulation layer 3 is made of polyurethane, and the other heat insulation layer 3 is made of polystyrene boards. Specifically, when the thermal insulation layer 3 is made of an air layer, that is, when the cells 1 are arranged, a gap portion is reserved between two adjacent cells 1, and the gap portion is the air layer serving as the thermal insulation layer 3.
According to another embodiment of the present invention, there is provided a battery pack including the tray and the battery module as described above; at least one heat conduction layer 2 is arranged between the edge beam of the tray and the battery module.
In this battery pack, the heat conductive layer 2 can transfer the heat of the battery module to the edge beam of the tray, thereby accelerating the heat dissipation of the battery module.
According to still another embodiment of the present invention, there is provided an electric vehicle including the battery pack as described above.
In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A battery module, comprising:
at least two batteries (1);
at least one heat conduction layer (2) is clamped between two adjacent batteries (1); the heat conduction coefficient of the heat conduction layer (2) is not less than 3W/MK.
2. The battery module according to claim 1, wherein at least one thermal insulation layer (3) is further provided between two adjacently arranged batteries (1).
3. The battery module according to claim 2, wherein the number of the heat conductive layers (2) is two, the number of the heat insulating layers (3) is one, and the heat insulating layers (3) are sandwiched between the two heat conductive layers (2).
4. The battery module according to claim 2, wherein the number of the heat insulating layers (3) is two, the number of the heat conducting layers (2) is one, and the heat conducting layers (2) are sandwiched between the two heat insulating layers (3).
5. The battery module according to claim 2, wherein the adjacent heat conducting layer (2) and the heat insulating layer (3) are bonded or welded.
6. The battery module according to claim 2, wherein contact is provided between the adjacently disposed heat conductive layer (2) and the heat insulating layer (3).
7. The battery module according to claim 2, wherein the thermal conductivity of the thermal insulation layer (3) is not more than 0.5W/MK.
8. The battery module according to claim 1, wherein the heat conducting layer (2) is made of a heat conducting material.
9. The battery module according to claim 2, wherein the thermal insulation layer (3) is made of aerogel, polyurethane, rubber, rock wool, polystyrene board, glass fiber, pre-oxidized fiber or an air layer.
10. A battery pack, comprising a tray and the battery module according to any one of claims 1 to 9; at least one heat conduction layer (2) is arranged between the edge beam of the tray and the battery module.
11. An electric vehicle characterized by comprising the battery pack according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123323685.8U CN217134479U (en) | 2021-12-27 | 2021-12-27 | Battery module, battery package and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123323685.8U CN217134479U (en) | 2021-12-27 | 2021-12-27 | Battery module, battery package and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217134479U true CN217134479U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123323685.8U Active CN217134479U (en) | 2021-12-27 | 2021-12-27 | Battery module, battery package and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217134479U (en) |
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2021
- 2021-12-27 CN CN202123323685.8U patent/CN217134479U/en active Active
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