CN214957070U - Battery pack heat exchange device and battery system - Google Patents
Battery pack heat exchange device and battery system Download PDFInfo
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- CN214957070U CN214957070U CN202121414560.3U CN202121414560U CN214957070U CN 214957070 U CN214957070 U CN 214957070U CN 202121414560 U CN202121414560 U CN 202121414560U CN 214957070 U CN214957070 U CN 214957070U
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- cooling liquid
- battery pack
- bottom plate
- liquid flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to the technical field of lithium batteries, and discloses a battery pack heat exchange device and a battery system, the battery pack heat exchange device comprises a lower box body and a plurality of heating elements, the lower box body is provided with a bottom plate made of heat conduction materials, a cooling liquid flow passage for circulating cooling liquid is arranged in the bottom plate, the bottom plate is provided with an inner plate for supporting an electric core module, and an outer plate which is connected with the inner plate in a sealing way to form the cooling liquid flow passage, the inner plate is made of heat conduction materials, and the outer wall of the outer plate is provided with a heat preservation layer or is made of heat insulation materials; the plurality of heating elements are sequentially distributed in the cooling liquid flow channel at intervals along the first direction. The utility model discloses it is integrated inside the bottom plate to flow the way with the coolant liquid to regard as the cold drawing with the bottom plate to use, not only need not to set up the cold drawing alone, still follow the interval distribution in proper order in the coolant liquid flow way with a plurality of heating element, solved because of set external PTC heater and increase whole battery system occupation space's problem.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a battery package heat transfer device and battery system.
Background
The electric core module of lithium cell is installed in the battery package box usually, utilizes the battery package box to fix the electric core module. Can produce the heat in the lithium cell working process, in order to dispel the heat to the lithium cell, set up the cold drawing usually between the box diapire of battery package box and electric core module, paste the upper surface of cold drawing in the lower surface of electric core module, paste the lower surface of cold drawing in the interior diapire of battery package box, the interior circulation coolant liquid of cold drawing for cool off the lithium cell.
In order to guarantee under the low temperature condition, electric core module can normally work. The PTC heater that sets up outside the battery package box usually among the prior art, when ambient temperature is lower, PTC heater start work is in order to heat the coolant liquid, and the coolant liquid carries out the heat transfer with electric core module, realizes heating electric core module.
In order to facilitate the circulation of the cooling liquid, a cold plate is arranged between the bottom plate and the battery cell module, and a cooling liquid flow channel is arranged in the cold plate and used for circulating the cooling liquid. The height of the whole battery pack can be increased due to the arrangement of the cold plate, the space requirement of the external PTC heater is large, and the occupied space of the battery system can be further increased. Therefore, a heat exchange device for a battery pack is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery package heat transfer device and battery system can solve because of set cold drawing and external PTC heater and increase the problem of whole battery system occupation space.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery pack heat transfer device comprising:
the battery cell module comprises a lower box body, a bottom plate of the lower box body is internally provided with a cooling liquid flow channel, the cooling liquid flow channel is used for circulating cooling liquid, the bottom plate is provided with an inner plate used for supporting the battery cell module and an outer plate which is hermetically connected with the inner plate to form the cooling liquid flow channel, the inner plate is made of heat conducting materials, and the outer wall of the outer plate is provided with a heat insulation layer or is made of heat insulating materials;
the heating elements are arranged in the cooling liquid flow channel, and are arranged in a plurality of the heating elements which are sequentially distributed at intervals along a first direction.
As a preferable technical solution of the heat exchanger for battery pack, the heating element is a PTC heater.
As a preferable technical solution of the above battery pack heat exchanging device, the heating element includes a heating wire, the heating wire has two opposite ends, and each of the two opposite ends penetrates through the side wall of the bottom plate so that the plurality of heating elements are electrically connected in series and/or in parallel to form a positive connection end and a negative connection end.
As a preferable technical scheme of the heat exchanger for battery packs, the lower box body is a metal piece, an insulating layer is sleeved outside each end part, the insulating layer is made of a high-temperature-resistant material, a through hole for penetrating the heating element is formed in the side wall of the bottom plate, and the insulating layer is located in the through hole.
As a preferable technical solution of the heat exchanger for battery pack, a metal welding layer is sleeved outside the insulating layer, and the heating element is welded and connected to the side wall of the bottom plate through the metal welding layer.
As a preferable mode of the heat exchanger for battery pack, the lower case is made of aluminum.
As a preferable technical solution of the heat exchanger for battery pack, the sidewall is made of a non-metallic insulating material, and the sidewall and the heating wire are integrally injection-molded.
As a preferable technical solution of the heat exchanger for battery pack, the bottom plate includes a body and side walls located at two opposite ends of the body, the coolant flow channel is disposed in the body, and the side walls are used for blocking the coolant flow channel.
As a preferable technical solution of the heat exchanger for battery pack, the side wall and the body are welded and fixed.
The utility model also provides a battery system, including foretell battery package heat transfer device.
The utility model has the advantages that: the cooling liquid flow channel is integrated in the bottom plate, so that the bottom plate is used as a cold plate, the cold plate does not need to be arranged independently, and the heating elements are distributed in the cooling liquid flow channel at intervals along the first direction in turn, thereby solving the problem that the occupied space of the whole battery system is increased due to the arrangement of an external PTC heater; the heating element directly heats the cooling liquid in the cooling liquid flow channel, the inner plate is made of heat conducting materials, and the heat exchange efficiency of heat exchange between the cooling liquid and the battery cell module is high; moreover, the outer wall of the outer plate is provided with the heat-insulating layer or the outer plate made of heat-insulating materials is adopted, so that the energy dissipated outside through the outer plate can be reduced, and the energy utilization rate is improved; when needs cool off electric core module, the coolant liquid in the coolant liquid runner carries out the heat exchange efficiency height of heat transfer with electric core module.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a bottom plate (with a heating element) of a lower box provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the bottom plate (with heating elements) of the lower housing provided by an embodiment of the present invention;
fig. 3 is a schematic partial structural view of a heating element provided in an embodiment of the present invention;
fig. 4 is a schematic diagram of the connection among the coolant pipeline, the upper cover and the joint provided by the embodiment of the invention.
In the figure:
1. a base plate; 11. a body; 111. a coolant flow passage; 12. a side wall;
21. an electric heating wire; 22. an insulating layer; 23. welding a metal layer;
3. an upper cover;
4. a coolant line; 41. a first flange plate;
5. a joint; 52. a second flange.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
As shown in fig. 1 to 3, the present embodiment provides a heat exchange device for a battery pack, which includes a lower case and a plurality of heating elements, wherein the lower case has a bottom plate 1 made of a heat conductive material, a cooling liquid channel 111 for circulating a cooling liquid is disposed in the bottom plate 1, the bottom plate 1 has an inner plate for supporting a battery cell module and an outer plate hermetically connected with the inner plate to form the cooling liquid channel 111, and an insulating layer is disposed on an outer wall of the outer plate; the plurality of heating elements are sequentially distributed in the cooling liquid channel 111 at intervals along the first direction.
In the embodiment, the cooling liquid flow channel 111 is integrated inside the base plate 1, so that the base plate 1 is used as a cold plate, a cold plate does not need to be arranged independently, and a plurality of heating elements are sequentially distributed in the cooling liquid flow channel 111 at intervals along the first direction, thereby solving the problem that the occupied space of the whole battery system is increased due to the arrangement of an external PTC heater; the heating element directly heats the cooling liquid in the cooling liquid flow channel 111, the inner plate is made of heat conducting materials, and the heat exchange efficiency of heat exchange between the cooling liquid and the battery cell module is high; moreover, the outer wall of the outer plate is provided with the heat-insulating layer or the outer plate made of heat-insulating materials is adopted, so that the energy dissipated outside through the outer plate can be reduced, and the energy utilization rate is improved; when needs cool off electric core module, the coolant liquid in coolant liquid runner 111 carries out the heat exchange efficiency height of heat transfer with electric core module.
Further, the heating element includes a heating wire 21, the heating wire 21 has two opposite ends, each end is extended out from the side wall 12 of the bottom plate 1 to electrically connect the plurality of heating elements in series and/or in parallel to form a positive connection end and a negative connection end, and the positive connection end and the negative connection end are connected to the positive and negative poles of the power supply through an electromagnetic switch. In other embodiments, a PTC heater may be used instead of the heating wire 21.
In this embodiment, the lower box body is a metal member, each end portion is sleeved with an insulating layer 22, the insulating layer 22 is made of a high-temperature-resistant material, the side wall 12 of the bottom plate 1 is provided with a through hole for penetrating a heating element, and the insulating layer 22 is located in the through hole. The heating element is insulated and protected by the insulating layer 22, and the insulating layer 22 made of high-temperature resistant material is adopted to prevent partial heat from diffusing outwards through the insulating layer 22 and the box body when the heating wire 21 works so as to reduce the heat utilization rate.
Further, in order to connect the heating element to the side wall 12 of the base plate 1, in the present embodiment, the insulating layer 22 is coated with a metal welding layer, and the heating element is connected to the side wall 12 of the base plate 1 by welding through the metal welding layer. Preferably, the metal welding layer is made of aluminum, and the internal insulation layer 22 and the metal welding layer are integrally injection molded.
It should be noted that, when the lower case is made of a non-metallic insulating material, such as a plastic material, since the lower case itself has an insulating property, it is not necessary to provide a metal welding layer and an insulating layer 22, and the heating wire 21 and the sidewall 12 of the bottom plate 1 may be integrally injection-molded.
In this embodiment, the bottom plate 1 includes a body 11 and side walls 12 respectively located at two opposite ends of the body 11, the cooling liquid channel 111 is disposed in the body 11, and the cooling liquid channel 111 is blocked by the side walls 12. Preferably, the side wall 12 is welded to the body 11.
Further, as shown in fig. 4, the heat exchanger for a battery pack further includes an upper cover 3, a coolant pipe 4 and a connector 5, wherein one end of the coolant pipe 4 is communicated with the coolant flow channel 111, and the other end of the coolant pipe 4 extends out of the upper cover 3 and is inserted into and hermetically connected with the connector 5. Specifically, one end of the coolant pipe 4 is inserted into the joint 5, and a sealing member such as a packing or the like is provided between an inner wall of the joint 5 and an outer wall of the coolant pipe 4 to prevent the coolant in the coolant pipe 4 from overflowing through a gap between the joint 5 and the coolant pipe 4.
In this embodiment, there are two cooling liquid pipelines 4, which are a liquid inlet pipeline and a liquid outlet pipeline, respectively, and each cooling liquid pipeline 4 is provided with a joint 5; the heat exchange device for the battery pack further comprises a circulating pump, wherein the circulating pump is used for sending the cooling liquid into the cooling liquid flow channel 111 through a liquid inlet pipeline and discharging the cooling liquid in the cooling liquid flow channel 111 through a liquid outlet pipeline. The circulation of coolant liquid is realized through the circulating pump, and the uniformity of coolant liquid and electric core module heat transfer is improved.
A temperature sensor is arranged in the cooling liquid flow passage 111, and the temperature in the cooling liquid flow passage 111 is detected in real time through the temperature sensor so as to control the temperature in the cooling liquid flow passage 111 within a required range.
Furthermore, a first flange 41 is integrally arranged on the cooling liquid pipeline 4, and the first flange 41 is abutted against the inner wall of the upper cover 3 so as to support the upper cover 3 by the first flange 41; the joint 5 is connected with a second flange 52 which is arranged integrally with the joint, a sealing ring is arranged between the second flange 52 and the outer wall of the upper cover 3, and water vapor is prevented from entering an installation space through a gap between the upper cover 3 and the cooling liquid pipeline 4 by arranging a sealing element between the second flange 52 and the outer wall of the upper cover 3.
The embodiment also provides a battery system which comprises the battery pack heat exchange device.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (10)
1. A battery pack heat transfer apparatus, comprising:
the battery cell module comprises a lower box body, wherein the lower box body is provided with a bottom plate (1), a cooling liquid flow channel (111) is arranged in the bottom plate (1), the cooling liquid flow channel (111) is used for circulating cooling liquid, the bottom plate (1) is provided with an inner plate used for supporting the battery cell module and an outer plate which is hermetically connected with the inner plate to form the cooling liquid flow channel, the inner plate is made of heat conducting materials, and the outer wall of the outer plate is provided with a heat insulation layer or is made of heat insulation materials;
the heating elements are arranged in the cooling liquid flow channel (111), and are arranged in a plurality of sequentially distributed at intervals along a first direction.
2. The battery pack heat exchange device of claim 1, wherein the heating element is a PTC heater.
3. The battery pack heat exchanger according to claim 1, wherein the heating elements comprise heating wires (21), the heating wires (21) having two oppositely disposed ends, each end protruding from the side wall (12) of the base plate (1) to electrically connect the plurality of heating elements in series and/or in parallel to form a positive connection end and a negative connection end.
4. The battery pack heat exchange device according to claim 3, wherein the lower box body is a metal piece, an insulating layer (22) is sleeved outside each end part, the insulating layer (22) is made of a high-temperature-resistant material, a through hole for penetrating the heating element is formed in the side wall (12) of the bottom plate (1), and the insulating layer (22) is located in the through hole.
5. The battery pack heat exchanger according to claim 4, wherein the insulating layer (22) is sheathed with a metal welding layer by which the heating element is welded to the side wall (12) of the base plate (1).
6. The battery pack heat exchange apparatus of claim 5, wherein the lower case is made of aluminum.
7. The battery pack heat exchanger according to claim 3, wherein the side wall is made of a non-metallic insulating material, and the side wall (12) is injection molded integrally with the heating wire (21).
8. The battery pack heat exchanging device according to claim 1, wherein the bottom plate (1) comprises a body (11) and side walls (12) at two opposite ends of the body (11), the cooling liquid flow channel (111) is disposed in the body (11), and the side walls (12) are used for blocking the cooling liquid flow channel (111).
9. The battery pack heat exchanger according to claim 8, wherein the side wall (12) is welded to the body (11).
10. A battery system comprising the battery pack heat exchanging apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121414560.3U CN214957070U (en) | 2021-06-24 | 2021-06-24 | Battery pack heat exchange device and battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121414560.3U CN214957070U (en) | 2021-06-24 | 2021-06-24 | Battery pack heat exchange device and battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214957070U true CN214957070U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121414560.3U Active CN214957070U (en) | 2021-06-24 | 2021-06-24 | Battery pack heat exchange device and battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214957070U (en) |
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2021
- 2021-06-24 CN CN202121414560.3U patent/CN214957070U/en active Active
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