Graphene self-temperature-control assembly of battery pack

Abstract

The invention discloses a graphene automatic temperature control assembly of a battery pack, the battery pack comprises a bottom shell and a plurality of groups of battery modules mounted in the bottom shell, the plurality of groups of battery modules are uniformly arranged and mounted on the inner bottom surface of the bottom shell in an array manner, so that gaps are formed between the battery modules, and the graphene automatic temperature control assembly is arranged between the battery modules. The plurality of battery modules are electrically connected in series in sequence through the electrode conductors and are electrically connected to the charging socket through the controller; the battery pack is characterized in that the automatic temperature control assembly comprises a grid frame body which is arranged in the interval and fixedly connected to the inner bottom face of the bottom shell, the grid frame body is made of a graphene material so as to achieve power-on heating, and each grid of the grid frame body correspondingly surrounds one battery module; each battery module is surrounded by the grid frame body made of the graphene material, and independent temperature control of each battery module is realized by utilizing the characteristic that graphene is electrified to generate heat, so that the local supercooling phenomenon is effectively avoided, and the temperature uniformity of the battery pack is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery pack temperature control, and particularly relates to a graphene self-temperature-control assembly of a battery pack. BACKGROUND

[0002] With the rapid development of new energy technology, the performance and safety of a battery pack as a core component for energy storage and power supply are concerned. However, a large amount of heat is generated during the working process of the battery pack, and if the heat cannot be dissipated or distributed in time, the temperature of the battery module will be too high, thereby affecting the service life of the battery and even causing safety hazards. Traditional temperature control schemes mostly use external heat sinks or fans, but there are problems such as inaccurate temperature control, high energy consumption, and complex structure. In addition, there is a lack of a temperature control scheme that can dynamically adjust according to the actual temperature of the battery module in the prior art, and it is difficult to meet the needs of high-energy-density battery packs.

[0003] Therefore, it is necessary to provide a self-temperature-control assembly that can accurately control the temperature and has a compact structure, so as to improve the performance and safety of the battery pack. SUMMARY

[0004] The application aims to provide a graphene self-temperature-control assembly of a battery pack to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme.

[0006] A graphene self-temperature-control assembly of a battery pack, the battery pack comprising a bottom shell and a plurality of battery modules installed in the bottom shell, the plurality of battery modules being evenly arrayed and installed on the inner bottom surface of the bottom shell, so that the battery modules and the battery modules form a gap, and the plurality of battery modules are electrically connected in series by electrode conductors and connected to a charging socket by a controller; characterized in that the self-temperature-control assembly comprises a lattice frame arranged in the gap and fixedly connected to the inner bottom surface of the bottom shell, the lattice frame is made of graphene material to realize power heating, and each lattice of the lattice frame corresponds to a group of battery modules to realize accurate temperature control.

[0007] Preferably, the lattice frame is composed of a plurality of transverse heating bodies and a plurality of longitudinal heating bodies, the transverse heating bodies and the longitudinal heating bodies are made of graphene material and are electrically connected to the controller to be controlled by the controller to heat.

[0008] Preferably, the lattice frame further comprises a frame fixed to the inner bottom surface of the bottom shell, each intersection in the frame forms a column, the transverse heating bodies are integrally and fixedly arranged in the corresponding columns, and the longitudinal heating bodies are fixedly clamped on the corresponding columns, so that the plurality of transverse heating bodies and the plurality of longitudinal heating bodies are interwoven to form a lattice structure.

[0009] Preferably, one end of all the transverse heating bodies is uniformly connected to the controller as the positive electrode through a wire harness, and the other end is uniformly connected to the controller as the negative electrode through a wire harness; similarly, one end of all the longitudinal heating bodies is uniformly connected to the controller as the positive electrode through a wire harness, and the other end is uniformly connected to the controller as the negative electrode through a wire harness; the power supply heating of the transverse heating bodies or the longitudinal heating bodies can be controlled individually by the controller.

[0010] Preferably, the column is a regular octagonal prism.

[0011] Preferably, the middle grid in the grid frame is provided with at least one temperature sensor, the temperature sensor is arranged on the edge surface of one regular octagonal prism in the grid, and the temperature sensor is electrically connected to the controller.

[0012] Preferably, the edge surface of the regular octagonal prism towards the grid forms an air inlet hole, a prism through hole communicating with the air inlet hole is formed in the regular octagonal prism, a channel communicating with the prism through hole is formed in the frame, and the channel communicates to an exhaust fan arranged on an outer side surface of the bottom shell body, and the exhaust fan exhausts the air in the grid through the corresponding air inlet hole to achieve heat dissipation.

[0013] Preferably, the exhaust fan is provided with two.

[0014] Preferably, the exhaust port of the exhaust fan is provided with a wind deflector, and the air outlet of the wind deflector is arranged upwards.

[0015] Preferably, a cover body is arranged on the opening of the bottom shell body.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The grid frame made of graphene material surrounds each group of battery modules, utilizes the characteristics of graphene power heating, realizes independent temperature control of each group of battery modules, effectively avoids the supercooling phenomenon in a low-temperature environment, and significantly improves the temperature uniformity of the battery pack; in addition, the air inlet hole and the exhaust fan arranged in the grid frame can quickly exhaust the hot air around the battery module, and the further optimized heat dissipation channel design ensures the heat dissipation efficiency and prolongs the service life of the battery.

[0018] 2. The grid frame of the present application is composed of transverse heating bodies and longitudinal heating bodies, which has a simple structure and occupies a small space, can perfectly adapt to the arrangement mode of multiple groups of battery modules, and does not need to occupy additional internal space of the battery pack. At the same time, the power supply heating of the transverse heating bodies or the longitudinal heating bodies is controlled individually by the controller, combined with the feedback of the temperature sensor, dynamic adjustment is realized, and the further optimized control logic ensures the minimization of energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is an exploded view of the present application;

[0020] Figure 2 is a perspective view of the present application (without cover); Figure 1 is a partial enlarged view of A in the middle;

[0021] Figure 3 is a perspective view of the present application (without cover);

[0022] Figure 4 is a top view of the present application (without cover);

[0023] Figure 5 is a perspective view of the lattice frame of the present application;

[0024] Figure 6 is a perspective view of the present application (without cover); Figure 5 is a partial enlarged view of B in the middle;

[0025] Figure 7 is a perspective view of the lattice frame of the present application from another angle;

[0026] Figure 8 is a perspective view of the present application (without cover); Figure 7 is a partial enlarged view of C in the middle.

[0027] In the figure: 1 - bottom shell; 2 - battery module; 3 - electrode conductor; 4 - controller; 5 - charging socket; 6 - lattice frame; 7 - transverse heating body; 8 - longitudinal heating body; 9 - frame; 10 - stand column; 11 - wire harness; 12 - temperature sensor; 13 - air inlet hole; 14 - exhaust fan; 15 - wind deflector; 16 - cover. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] As shown in the drawings, the present application is a self-temperature control assembly applied to a battery of a new energy vehicle, which adopts graphene as a heating material and is mainly used to solve the problem of serious reduction of battery performance in supercooling weather and improve the endurance of the battery in winter. Figures 1 to 8 , Figure 1 , Figure 3 and Figure 4As shown, the battery pack used by the new energy vehicle of the present application generally comprises a bottom shell 1 and a plurality of battery modules 2 installed in the bottom shell 1, the plurality of battery modules 2 are uniformly arrayed and installed on the inner bottom surface of the bottom shell 1, and the battery modules 2 are spaced apart from each other, the plurality of battery modules 2 are electrically connected in series through electrode conductors 3 to form a battery pack with a large voltage, and then the battery pack is electrically connected to a charging socket (5) through a controller 4. The self-temperature control assembly comprises a lattice frame 6 arranged in the space and fixedly connected to the inner bottom surface of the bottom shell 1, and the lattice frame 6 is made of graphene material to realize electric heating. Specifically, each lattice of the lattice frame 6 corresponds to a group of battery modules 2 (the specific arrangement is as shown in Figure 3 and Figure 4 As shown), so that the precise temperature control of each group of battery modules can be realized through the heating characteristics of graphene.

[0030] Further optimization, as shown in Figures 5 to 8 The lattice frame 6 is composed of a plurality of transverse heating bodies 7 and a plurality of longitudinal heating bodies 8, the transverse heating bodies 7 and the longitudinal heating bodies 8 are made of graphene material and are electrically connected to the controller 4, and the power supply and heating are controlled by the controller 4. Preferably, the transverse heating bodies 7 and the longitudinal heating bodies 8 are made of high-purity graphene material to ensure uniform heating and rapid response.

[0031] As shown in Figures 5 to 8 The lattice frame 6 further comprises a frame 9 fixed to the inner bottom surface of the bottom shell 1, and each intersection in the frame 9 forms a column 10 (i.e. the intersection of the transverse frame beams and the longitudinal frame beams in the frame 9 structure forms the column 10). Specifically, the transverse heating bodies 7 are integrally fixed in the corresponding columns 10, and the longitudinal heating bodies 8 are fixedly clamped on the corresponding columns 10, so that the plurality of transverse heating bodies 7 and the plurality of longitudinal heating bodies 8 are interlaced to form a lattice structure. This design not only has a stable structure, but also is convenient for installation and maintenance.

[0032] Further, one end of all the transverse heating bodies 7 is uniformly connected to the controller 4 as a positive electrode through a wire harness 11, and the other end is uniformly connected to the controller 4 as a negative electrode through the wire harness 11; similarly, one end of all the longitudinal heating bodies 8 is uniformly connected to the controller 4 as a positive electrode through the wire harness 11, and the other end is uniformly connected to the controller 4 as a negative electrode through the wire harness 11. The power supply and heating of the transverse heating bodies 7 or the longitudinal heating bodies 8 can be controlled by the controller 4 (the transverse heating bodies 7 can be controlled to heat, and the longitudinal heating bodies 8 do not heat, of course, the transverse heating bodies 7 and the longitudinal heating bodies 8 can also be controlled to heat at the same time, the specific control is determined by the use requirement), so as to realize dynamic temperature adjustment and ensure the accuracy of temperature control.

[0033] As shown in Figure 6 and Figure 8As shown, the column 10 is a regular octagonal prism, which is not only beautiful, but also facilitates the installation and fixation of the transverse heating body 7 and the longitudinal heating body 8. Preferably, as shown in the figure, Figure 6 and Figure 8 As shown, the middle cell in the lattice frame 6 is provided with at least one temperature sensor 12, which is arranged on the edge surface of one regular octagonal prism in the cell and is electrically connected to the controller 4. The temperature of the battery module 2 is monitored in real time by the temperature sensor 12, and the controller 4 adjusts the power supply state of the heating body according to the feedback data to realize intelligent temperature control. In this embodiment, the temperature sensor 12 is arranged in the middle cell of the lattice frame 6, which can measure the temperature in the cell, i.e. the ambient temperature of the battery module 2; in practice, the temperature in each cell of the lattice frame 6 is actually not much different, so at least one temperature sensor 12 is provided in the entire lattice frame 6.

[0034] Further optimization, as shown in the figure, Figure 6 The edge surface of the regular octagonal prism facing the cell forms an air inlet hole 13, a prism through hole is formed in the regular octagonal prism to communicate with the air inlet hole 13, a channel is formed in the frame 9 to communicate with the prism through hole, and the channel communicates to an exhaust fan 14 arranged on an outer side surface of the bottom shell 1. The exhaust fan 14 exhausts the air in the cell through the corresponding air inlet hole 13 to achieve heat dissipation. Specifically, the exhaust fan 14 is provided with two to ensure the heat dissipation efficiency.

[0035] As shown in the figure, Figure 6 The exhaust port of the exhaust fan 14 is communicated with a wind deflector 15, and the outlet of the wind deflector 15 is arranged upward. This design can effectively avoid the backflow of hot air and further improve the heat dissipation effect. In addition, a cover body 16 is arranged on the opening of the bottom shell 1, which provides additional protection function.

[0036] When using the graphene self-control temperature assembly of the battery pack, in the case of overcooling in winter, the controller 4 dynamically adjusts the power supply state of the transverse heating body 7 or the longitudinal heating body 8 (mainly controls and adjusts the voltage or power to realize the power supply state) according to the feedback data of the temperature sensor 12, so that the transverse heating body 7 or the longitudinal heating body 8 generates heat or simultaneously generates heat, to ensure that the temperature of each group of battery modules 2 is in the optimal range. In addition, when the temperature is too high (mainly in summer), the exhaust fan 14 is started to quickly exhaust the hot air through the air inlet hole 13 and the channel to achieve efficient heat dissipation. During the whole process, the structure design and material characteristics of the self-control temperature assembly ensure the accuracy of temperature control and the minimization of energy consumption, so that the battery pack can adapt to the overcooling and overheating environment.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A graphene self-temperature regulating component for a battery pack, the battery pack comprising a bottom shell (1) and multiple sets of battery modules (2) mounted in the bottom shell (1), the multiple sets of battery modules (2) being uniformly arrayed and mounted on the inner bottom surface of the bottom shell (1), such that a gap is formed between the battery modules (2), the multiple sets of battery modules (2) being electrically connected in series in sequence through electrode conductors (3) and electrically connected to a charging port (5) through a controller (4); characterized in that: The self-temperature control component includes a grid frame (6) disposed in the interval and fixedly connected to the inner bottom surface of the bottom shell (1). The grid frame (6) is made of graphene material to achieve heating when energized. Each grid of the grid frame (6) surrounds a set of battery modules (2) to achieve precise temperature control.

2. The graphene self-temperature regulating component for a battery pack according to claim 1, characterized in that: The grid frame (6) is composed of several horizontal heating elements (7) and several vertical heating elements (8) interwoven together. The horizontal heating elements (7) and the vertical heating elements (8) are both made of graphene material and electrically connected to the controller (4), which controls the power supply and heating.

3. The graphene self-temperature regulating component for a battery pack according to claim 2, characterized in that: The grid frame (6) also includes a frame (9) fixed to the inner bottom surface of the bottom shell (1). Each intersection of the frame (9) forms a column (10). The horizontal heating element (7) is integrally fixed in the corresponding column (10). The vertical heating element (8) is fixedly installed on the corresponding column (10), so that a number of horizontal heating elements (7) and a number of vertical heating elements (8) interweave to form a grid structure.

4. The graphene self-temperature regulating component for a battery pack according to claim 3, characterized in that: One end of all the transverse heating elements (7) is uniformly connected to the controller (4) via a wire harness (11) as the positive terminal, and the other end is uniformly connected to the controller (4) via a wire harness (11) as the negative terminal; similarly, one end of all the longitudinal heating elements (8) is uniformly connected to the controller (4) via a wire harness (11) as the positive terminal, and the other end is uniformly connected to the controller (4) via a wire harness (11) as the negative terminal; the controller (4) can control the power supply and heating of the transverse heating elements (7) or the longitudinal heating elements (8) individually.

5. The graphene self-temperature regulating component for a battery pack according to claim 3, characterized in that: The column (10) is a regular octagonal prism.

6. The graphene self-temperature regulating component for a battery pack according to claim 5, characterized in that: At least one temperature sensor (12) is provided in the middle grid of the grid frame (6). The temperature sensor (12) is located on the edge of a regular octagonal prism in the grid and is electrically connected to the controller (4).

7. The graphene self-temperature regulating component for a battery pack according to claim 5, characterized in that: The facets of the regular octagonal prism facing the grid form air intake holes (13), and the octagonal prism body forms prism through holes that connect to the air intake holes (13). The frame (9) forms a channel that connects to the prism through holes. The channel connects to an exhaust fan (14) provided on an outer side of the bottom shell (1). The exhaust fan (14) exhausts air from the grid through the corresponding air intake holes (13) to achieve heat dissipation.

8. The graphene self-temperature regulating component for a battery pack according to claim 7, characterized in that: There are two exhaust fans (14).

9. The graphene self-temperature regulating component for a battery pack according to claim 7, characterized in that: The exhaust port of the exhaust fan (14) is connected to a guide shroud (15), and the air outlet of the guide shroud (15) is set upward.

10. The graphene self-temperature regulating component for a battery pack according to claim 1, characterized in that: The bottom shell (1) is provided with a cover (16) on the opening.

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