Battery pack heating integrated design structure coping with low-temperature use environment

Abstract

Disclosed in the present utility model is a battery pack heating integrated design structure coping with a low-temperature use environment, comprising a battery pack cold plate. The surface of the battery pack cold plate facing battery cells is provided with accommodating cavities, a heating piece is arranged in each accommodating cavity, and heat preservation cotton is arranged between each heating piece and the inner surface of the corresponding accommodating cavity; and the surface of the battery pack cold plate facing the battery cells is also provided with a heat-conducting layer. According to the present utility model, the heating piece design is integrated on the basis of the liquid heating and direct heating design, the slotting design is carried out on the basis of conventional battery pack cold plates, a heating piece mounting space is reserved, and the heating piece is built-in, thereby increasing the heating speed, improving the heating efficiency, saving the heating time, and mitigating the problem of occupying additional design space and weight in conventional heating piece mounting schemes; in addition, by adopting a built-in heating piece scheme, the heat efficiency is higher, heat loss is avoided, and the heating reliability is improved; the present utility model achieve sthe use of new energy electric vehicles in a low-temperature environment, and the use environment area of the new energy electric vehicles is widened.

Description

A battery pack heating integrated design structure for low-temperature use environments Technical Field

[0001] The utility model relates to the technical field of battery pack heating, and in particular to a battery pack heating integrated design structure for coping with low-temperature use environments. Background Art

[0002] New energy electric vehicles are powered by electricity and control the vehicle through the output of electricity through the battery pack. Under the current technical background, the charging and discharging performance of the on-board battery pack will become very poor in low temperature environments, and the battery pack may even lose power. Based on this, the use of new energy electric vehicles will be greatly restricted in cold winters or cold areas at high latitudes. In order to ensure that the battery pack of new energy electric vehicles can work normally in low temperature environments, it is necessary to have a corresponding heating strategy for the on-board battery pack.

[0003] Conventional single heating designs mostly use liquid heating, heating plates, direct heating and other solutions. When dealing with such low-temperature working conditions, there are problems such as slow temperature rise and long heating time. In particular, the heating plate design will add extra weight, which is not conducive to lightweighting. The design space requirements are high and the installation is complicated. At the same time, the external heating plate design has a certain amount of heat loss and poor heat conversion efficiency. Therefore, it is necessary to redesign the heating strategy to expand the use environment area of ​​new energy electric vehicles.

[0004] Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the present invention provides a battery pack heating integrated design structure for use in low-temperature environments.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A battery pack heating integrated design structure for use in low-temperature environments includes a battery pack cold plate, a receiving cavity is provided on the surface of the battery pack cold plate facing the battery cell, a heating plate is provided inside the receiving cavity, and thermal insulation cotton is provided between the heating plate and the inner surface of the receiving cavity; a heat-conducting layer is also provided on the surface of the battery pack cold plate facing the battery cell.

[0008] As a preferred embodiment of the present invention, the accommodating cavity is a groove structure with an opening.

[0009] As a preferred embodiment of the present invention, thermal insulation cotton is provided between the heating plate and the inner bottom of the groove structure accommodating cavity to avoid heat loss caused by direct contact between the heating plate and the battery pack cold plate.

[0010] Furthermore, the thermal insulation cotton is glued to the inner bottom of the groove structure accommodating cavity, and the thermal insulation cotton and the heating plate are also glued together; this facilitates the fixing of the thermal insulation cotton and the heating plate, and the installation is simple and convenient.

[0011] As a preferred embodiment of the present invention, the heat conductive layer covers the groove structure accommodating cavity and is in thermal contact with the heating plate inside the groove structure accommodating cavity; ensuring sufficient contact between the heating plate and the battery pack cold plate and the battery cell, thereby improving heat exchange efficiency.

[0012] As a preferred embodiment of the present invention, the heat-conducting layer is a heat-conducting glue or a heat-conducting pad; when the heat-conducting layer is a heat-conducting glue, the heat-conducting glue is applied to the surface of the battery pack cold plate and the surface of the heating plate.

[0013] As a preferred embodiment of the present invention, the battery pack cold plate is a harmonica tube type cold plate or a stamped cold plate; in this technical solution, the battery pack cold plates are all cold plates at the bottom of the battery cell. In actual application, it can also be simultaneously expanded to the integrated heating design of the battery cell side cold plate and the integrated heating design of the battery cell large surface cold plate.

[0014] The utility model is beneficial in that:

[0015] The integrated heating plate design is realized on the basis of liquid heating and direct heating design. The slot design is carried out on the basis of the conventional battery pack cold plate to reserve space for the installation of the heating plate. The heating plate adopts a built-in solution to speed up the heating speed, improve the heating efficiency and save heating time; it improves the problem of the conventional heating plate installation solution occupying additional design space and weight, and the installation is simple and convenient; in addition, the built-in heating plate solution has higher thermal efficiency, avoids heat loss and improves heating reliability; it is conducive to the use of new energy electric vehicles in low temperature environments, and broadens the use environment area of ​​new energy electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of an embodiment of the present invention;

[0017] FIG2 is a schematic structural diagram of another embodiment of the present invention;

[0018] The meaning of the reference numerals in the figure: 1-battery pack cold plate, 2-accommodation cavity, 3-heating plate, 4-insulation cotton, 5-thermal pad; 10-flow channel, 11-load-bearing plate, 12-flow channel plate. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] As shown in Figure 1, this embodiment is a battery pack heating integrated design structure for low-temperature use environments, including a battery pack cold plate 1, a receiving cavity 2 is provided on the surface of the battery pack cold plate 1 facing the battery cell, a heating plate 3 is provided inside the receiving cavity 2, and thermal insulation cotton 4 is provided between the heating plate 3 and the inner surface of the receiving cavity 2; a heat-conducting layer is also provided on the surface of the battery pack cold plate 1 facing the battery cell.

[0021] In this embodiment, the accommodating cavity 2 is a groove structure with an opening, and thermal insulation cotton 4 is arranged between the heating plate 3 and the inner bottom of the groove structure accommodating cavity 2; to avoid direct contact between the heating plate 3 and the battery pack cold plate 1 to cause heat loss; the thermal insulation cotton 4 is glued to the inner bottom of the groove structure accommodating cavity 2, and the thermal insulation cotton 4 and the heating plate 3 are also glued; it is easy to fix the thermal insulation cotton 4 and the heating plate 3, and the installation is simple and convenient.

[0022] In this embodiment, the thermal conductive layer covers the groove structure accommodating cavity 2 and is in thermal contact with the heating plate 3 inside the groove structure accommodating cavity 2; ensuring sufficient contact between the heating plate 3 and the battery pack cold plate 1 and the battery cell to improve heat exchange efficiency; the thermal conductive layer in this embodiment is a thermal pad 5; of course, the thermal conductive layer can also be made of thermal conductive glue, which is applied to the surface of the battery pack cold plate 1 and the surface of the heating plate 3.

[0023] In this embodiment, the battery pack cold plate 1 is a harmonica tube type cold plate, and a flow channel 10 is provided inside the harmonica tube type cold plate.

[0024] As shown in FIG2 , as another embodiment of the present invention, the battery pack cold plate 1 may also be a stamped cold plate; an accommodating cavity 2 is stamped on the load-bearing plate 11 of the stamped cold plate, and a flow channel plate 12 is provided on the surface of the load-bearing plate 11 facing away from the battery cell, forming a flow channel 10 between the flow channel plate 12 and the load-bearing plate 11.

[0025] In the above two embodiments, the battery pack cold plate 1 is the bottom cold plate of the battery cell. In actual application, it can also be simultaneously expanded to the battery cell side cold plate integrated heating design and the battery cell large surface cold plate integrated heating design.

[0026] The utility model realizes an integrated heating plate design based on the design of liquid heating and direct heating, and performs a slot design on the basis of the conventional battery pack cold plate, reserving space for the installation of the heating plate. The heating plate adopts a built-in solution to accelerate the heating speed, improve the heating efficiency, and save heating time; it improves the problem of the conventional heating plate installation solution occupying additional design space and weight, and the installation is simple and convenient; in addition, the built-in heating plate solution has higher thermal efficiency, avoids heat loss, and improves heating reliability; it is conducive to the use of new energy electric vehicles in low temperature environments, and broadens the use environment area of ​​new energy electric vehicles.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "formation" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] In the description of the present invention, reference to terms such as "embodiment", "specific example" or "practical application" means that the specific features, structures, materials or characteristics described in combination with the embodiment are included in at least one embodiment or example of the present invention; the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. An integrated design structure for heating a battery pack to cope with low-temperature usage environments, characterized in that: It includes a battery pack cold plate. A receiving cavity is provided on the surface of the battery pack cold plate facing the battery cells. A heating sheet is arranged inside the receiving cavity, and heat insulation cotton is arranged between the heating sheet and the inner surface of the receiving cavity; a heat conduction layer is also provided on the surface of the battery pack cold plate facing the battery cells.

2. The integrated design structure of battery pack heating for coping with low-temperature usage environment according to claim 1, characterized in that, The receiving cavity is a groove structure with an opening.

3. The integrated design structure for heating a battery pack to cope with low-temperature usage environments according to claim 2, wherein, Heat insulation cotton is arranged between the heating sheet and the inner bottom of the receiving cavity of the groove structure.

4. The integrated design structure for heating a battery pack to cope with a low-temperature usage environment according to claim 3, characterized in that, The heat insulation cotton is adhesively connected to the inner bottom of the receiving cavity of the groove structure, and the heat insulation cotton is also adhesively connected to the heating sheet.

5. The integrated design structure of a battery pack heating for coping with a low-temperature usage environment according to claim 2, characterized in that, The heat conduction layer covers the receiving cavity of the groove structure and is in heat conduction contact with the heating sheet inside the receiving cavity of the groove structure.

6. The integrated design structure of a battery pack heating for coping with a low-temperature usage environment according to claim 1 or 5, characterized in that, The heat conduction layer is a heat conduction adhesive or a heat conduction pad.

7. An integrated design structure for heating a battery pack to cope with a low-temperature usage environment according to claim 1, characterized in that, The battery pack cold plate is a harmonica tube type cold plate or a stamping type cold plate.

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