Battery box body and battery pack

Abstract

The utility model provides a battery box body and battery pack, battery box body includes box body frame, heat conducting plate and guard plate, box body frame forms the mounting space of battery cell, heat conducting plate is provided in the bottom of box body frame, heat conducting plate has a plurality of radiating fins that extend towards the one side away from battery cell, guard plate is connected with box body frame, and the heat conducting plate is connected with the box body frame. The protective plate is arranged on one side, deviating from the battery cell, of the heat-conducting plate; an air passage is formed between the protective plate and the heat-conducting plate. According to the battery box body and the battery pack provided by the utility model, the problem of low heat dissipation efficiency of a battery box body in the prior art can be solved by arranging the heat conducting plate and the protective plate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery-related structures, and in particular to a battery box and a battery pack. Background Art

[0002] The battery operates within a preset temperature range, for example, 20°C-60°C. The battery output efficiency is highest in this state. Therefore, the thermal management in the battery pack needs to maintain the battery in a preset temperature range.

[0003] There are currently three mainstream heat dissipation methods for battery packs: liquid cooling, direct cooling with refrigerant, and natural cooling. When dissipating heat through natural cooling, the current method is to contact the battery cell with the battery case frame, and use heat dissipation materials such as aluminum as the material of the battery case frame to achieve natural cooling of the battery cell through the battery case frame.

[0004] However, the current method of dissipating heat from battery cells through the battery box frame has the problem of low heat dissipation efficiency.

[0005] As can be seen from the above, the heat dissipation of the current battery box has the problem of low heat dissipation efficiency. Utility Model Content

[0006] The main purpose of the utility model is to provide a battery box and a battery pack to solve the problem of low heat dissipation efficiency of the battery box in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery box is provided, which includes a box frame, which forms an installation space for the battery cell; a heat conducting plate, which is arranged at the bottom of the box frame, and has a plurality of heat dissipating fins extending toward a side away from the battery cell; and a guard plate, which is connected to the box frame, and is arranged on a side of the heat conducting plate away from the battery cell, and an air passage is formed between the guard plate and the heat conducting plate.

[0008] Furthermore, the air passage is arranged along a first direction, a plurality of heat dissipation fins are arranged at intervals along a second direction perpendicular to the first direction, and each heat dissipation fin extends along the first direction.

[0009] Furthermore, the heat conducting plate includes a flat plate structure and heat dissipation fins. The flat plate structure is arranged at the bottom opening of the box frame, and the heat dissipation fins are arranged on a side of the flat plate structure away from the battery core.

[0010] Furthermore, the guard plate includes a bottom plate section, which is spaced apart from the flat plate structure and abuts against one end of the heat dissipation fin away from the battery cell; a side plate section, which is arranged on both sides of the bottom plate section along the second direction and between the bottom plate section and the box frame.

[0011] Further, at least one heat conducting plate is provided, and when a plurality of heat conducting plates are provided, the plurality of heat conducting plates are connected and provided along the first direction.

[0012] Furthermore, a plurality of heat conducting plates are provided, and the plurality of heat conducting plates are fixed by welding.

[0013] Furthermore, the heat conducting plate is fixed to the box frame by welding; and / or the battery box further comprises fasteners, and the guard plate is connected to the box frame by the fasteners.

[0014] Furthermore, the battery box also includes a filter, and the air inlet and the air outlet of the air passage are both provided with filters.

[0015] Furthermore, the battery box also includes a wind shield, which is detachably arranged on the box frame and is used to shield the air inlet and the air outlet of the wind passage.

[0016] According to another aspect of the utility model, a battery pack is provided, which includes a plurality of battery cells and the above-mentioned battery box, wherein the plurality of battery cells are installed inside a box frame of the battery box.

[0017] By applying the technical solution of the utility model, the battery box includes a box frame, a heat conducting plate and a protective plate. The box frame forms an installation space for the battery cell. The heat conducting plate is arranged at the bottom of the box frame. The heat conducting plate has a plurality of heat dissipating fins extending toward a side away from the battery cell. The protective plate is connected to the box frame. The protective plate is arranged on a side of the heat conducting plate away from the battery cell. An air passage is formed between the protective plate and the heat conducting plate.

[0018] As can be seen from the above, the present application adopts a heat conducting plate and a protective plate at the bottom of the box frame, and the air passage formed between the heat conducting plate and the protective plate is used to realize heat exchange between the gas and the cooling fins when the gas flows through the air passage, thereby realizing cooling of the battery cells inside the battery box, which is beneficial to improving the heat dissipation efficiency of the battery cells; at the same time, the protective plate is provided to protect the cooling fins, box frame and battery cells, thereby preventing the cooling fins, box frame and battery cells from being damaged, causing the battery box to fail to work or affecting the heat dissipation performance.

[0019] The present application increases the area in contact with the gas by providing a plurality of heat dissipating fins. When the gas flows through the heat dissipating fins, the gas takes away the heat on the heat dissipating fins. The heat dissipating fins have an external leakage structure, which is beneficial to enhancing the heat dissipation efficiency of the battery box.

[0020] The present application adopts the method of abutting the bottom plate section of the guard plate against the heat dissipation fins. The heat dissipation fins can be used as structural parts. When the bottom plate section of the guard plate is subjected to impact force in a third direction, it collapses and absorbs energy to provide protection, thereby improving the overall stability of the battery box.

[0021] The battery cell of the present application is supported on a heat-conducting plate to achieve contact between the battery cell and the heat-conducting plate, thereby facilitating improvement of the heat dissipation efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the three-dimensional structure of the battery pack of the present utility model is shown;

[0024] Figure 2 Another three-dimensional structural schematic diagram of the battery box of the utility model is shown;

[0025] Figure 3 A side view of a battery box of the present utility model is shown;

[0026] Figure 4 A cross-sectional view of a battery box of the present utility model is shown;

[0027] Figure 5 An exploded view showing a battery pack of the present invention without a windshield;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of the battery box of the utility model without the guard plate is shown;

[0029] Figure 7 A schematic diagram of the three-dimensional structure of the heat conducting plate of the utility model is shown;

[0030] Figure 8 An exploded view of the battery pack of the present invention is shown;

[0031] Fig. 9 A schematic diagram of the installation structure of the windshield of the utility model is shown;

[0032] Fig.10 A three-dimensional structural schematic diagram of the windshield of the utility model is shown.

[0033] The above drawings include the following reference numerals:

[0034] 10. Box frame; 20. Battery cell; 30. Heat conducting plate; 310. Flat plate structure; 320. Heat dissipating fins; 40. Protective plate; 50. Air passage; 60. Heating film; 70. Wind shield. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0037] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0038] Embodiment 1

[0039] In order to solve the problem of low heat dissipation efficiency of the battery box in the prior art, this embodiment provides a battery box to improve the heat dissipation efficiency.

[0040] like Figures 1 to 7 As shown, the battery box includes a box frame 10, a heat conductive plate 30 and a protective plate 40. The box frame 10 forms an installation space for the battery cell 20. The heat conductive plate 30 is arranged at the bottom of the box frame 10. The heat conductive plate 30 has a plurality of heat dissipation fins 320 extending toward the side away from the battery cell 20. The protective plate 40 is connected to the box frame 10. The protective plate 40 is arranged on the side of the heat conductive plate 30 away from the battery cell 20. An air passage 50 is formed between the protective plate 40 and the heat conductive plate 30.

[0041] Specifically, the present application adopts a heat conducting plate 30 and a protective plate 40 set at the bottom of the box frame 10, and through the air passage 50 formed between the heat conducting plate 30 and the protective plate 40, when the gas flows through the air passage 50, the gas exchanges heat with the heat dissipation fins 320, thereby achieving cooling of the battery cells 20 inside the box frame 10, which is beneficial to improving the heat dissipation efficiency of the battery cells 20.

[0042] Furthermore, the present application provides a protective plate 40 to protect the heat dissipation fins 320, the box frame 10 and the battery cells 20, so as to prevent the heat dissipation fins 320, the box frame 10 and the battery cells 20 from being damaged, which may cause the battery box to fail to work or affect the heat dissipation performance. For example, it is prevented that external gravel or raised obstacles directly hit the heat dissipation fins 320. The protective plate 40 is made of a rigid material, such as steel.

[0043] Furthermore, the heat conducting plate 30 is made of copper or aluminum with good thermal conductivity to facilitate welding with the box frame 10. At the same time, the heat conducting plate 30 can also achieve a heat conducting effect during the use of the battery pack.

[0044] In this embodiment, multiple heat dissipation fins 320 are provided to increase the area in contact with the gas. When the gas flows through the heat dissipation fins 320, the gas takes away the heat on the heat dissipation fins 320. The heat dissipation fins 320 are of an external leakage structure, which is beneficial to enhancing the heat dissipation efficiency of the battery box.

[0045] It should be noted that the number of the heat dissipation fins 320 of the present application can be adaptively set according to needs.

[0046] like Figure 2 As shown, the air passage 50 is arranged along a first direction, a plurality of heat dissipation fins 320 are arranged at intervals along a second direction perpendicular to the first direction, and each heat dissipation fin 320 extends along the first direction.

[0047] The first direction is Figure 2 The X direction is shown, and the second direction is Figure 2 Y direction shown.

[0048] Specifically, when the battery box is installed on a vehicle, the first direction is the length direction of the vehicle body, so that when the vehicle is moving, gas can flow through the air passage 50, thereby improving the heat dissipation efficiency of the battery box.

[0049] Further, a plurality of heat dissipation fins 320 are arranged at intervals along the second direction, and a sub-air duct is formed between two adjacent heat dissipation fins 320 , and the sub-air duct is arranged along the first direction.

[0050] like Figures 5 to 7 As shown, the heat conducting plate 30 is connected to the bottom surface of the box frame 10, and the heat conducting plate 30 includes a flat plate structure 310 and heat dissipation fins 320 arranged on the flat plate structure 310, and the heat dissipation fins 320 are arranged on the side of the flat plate structure 310 away from the battery cell 20, and the flat plate structure 310 is arranged at the bottom opening of the box frame 10.

[0051] Specifically, the battery cell 20 is disposed inside the box frame 10 and supported on the flat plate structure 310 . The flat plate structure 310 can be used for heat conduction to assist the battery cell 20 in dissipating heat, thereby improving the use efficiency of the battery cell 20 .

[0052] The battery cell 20 and the flat plate structure 310 may be in direct contact, or a colloid may be disposed between the battery cell 20 and the flat plate structure 310 to achieve that the battery cell 20 is disposed on the flat plate structure 310 .

[0053] Furthermore, the box frame 10 has a top opening and a bottom opening along the third direction, the heat conducting plate 30 is arranged at the bottom opening, and the battery cell 20 is supported on the heat conducting plate 30 to achieve contact between the battery cell 20 and the heat conducting plate 30, which is beneficial to improve the heat dissipation efficiency of the battery cell 20.

[0054] Furthermore, the flat plate structure 310 and the heat dissipation fins 320 are an integrated structure, which is convenient for processing and helps to enhance the connection strength between the flat plate structure 310 and the heat dissipation fins 320 .

[0055] In this embodiment, the protective plate 40 includes a bottom plate section and a side plate section. The bottom plate section is spaced apart from the flat plate structure 310. The bottom plate section abuts against one end of the heat dissipation fin 320 away from the battery cell 20. The side plate sections are arranged on both sides of the bottom plate section along the second direction. The side plate sections are arranged between the bottom plate section and the box frame 10.

[0056] Specifically, the side panel sections are arranged in pairs on the bottom panel sections, so that when the side panel sections are connected to the box frame 10, the bottom panel sections can abut against the heat dissipation fins 320. The present application adopts the bottom panel sections of the protective plate 40 to abut against the heat dissipation fins 320. The heat dissipation fins 320 can be used as structural parts. When the bottom panel section of the protective plate 40 is subjected to impact force in a third direction, it can collapse and absorb energy to provide protection, thereby improving the overall stability of the battery box.

[0057] Among them, the third direction is Figure 2 The Z direction shown is the height direction of the box frame 10 .

[0058] Further, the present application provides at least one heat conducting plate 30 , and when multiple heat conducting plates 30 are provided, the multiple heat conducting plates 30 are connected and provided along the first direction.

[0059] Furthermore, the plurality of heat conducting plates 30 are fixed by welding, and the specific welding method may be stir friction welding.

[0060] In this embodiment, the heat conducting plate 30 is fixed to the box frame 10 by welding, and the welding fixation method is beneficial to improving the installation strength and installation stability of the heat conducting plate 30 .

[0061] In this embodiment, the battery box further includes fasteners, and the guard plate 40 is connected to the box frame 10 through the fasteners, and the fasteners can be structural parts such as bolts and pins to facilitate the removal and replacement of the guard plate 40. Specifically, the box frame 10 is provided with threaded holes corresponding to the guard plate 40, so that the guard plate 40 and the box frame 10 can be locked and fixed by fasteners.

[0062] In this embodiment, the battery box also includes a filter, and the filter is provided at the air inlet and the air outlet of the air passage 50. By providing the filter at the air inlet and the air outlet of the air passage 50, a filtering effect is achieved to prevent external particles such as gravel from entering the air passage 50, causing abnormal noise and damaging the heat dissipation fins 320, which is conducive to improving the safety and user experience of the battery box.

[0063] like Figures 8 to 10 As shown, the battery box further includes a wind shield 70 , which is detachably disposed on the box frame 10 of the battery box. The wind shield 70 is used to shield the air inlet and the air outlet of the air passage 50 .

[0064] Among them, the wind shield 70 is detachably arranged on the box frame 10. When the wind shield 70 is installed on the box frame 10, the wind shield 70 is located at the air inlet and the air outlet to achieve shielding of the air inlet and the air outlet, that is, the wind shield 70 is used to block the gas from flowing into the air passage 50, thereby achieving low temperature conditions, such as winter, to prevent cold air from entering the air passage 50, causing the ambient temperature of the battery cell 20 to drop, thereby affecting the use efficiency of the battery cell 20.

[0065] Furthermore, the battery case also includes a heating film 60. When there are multiple battery cells 20, the multiple battery cells 20 are stacked to form at least one battery cell group. The multiple battery cell groups can be arranged at intervals along the first direction and / or the second direction. The heating film 60 extends along the direction of battery cell stacking. Each battery cell group is provided with a heating film 60 on both sides perpendicular to the battery cell stacking direction, which is used to heat the battery cell groups respectively. By providing the heating film 60, when the ambient temperature of the battery case is low, the heating film 60 is provided to heat the battery cell 20, thereby improving the use efficiency of the battery cell 20.

[0066] Furthermore, the heating film 60 is adhered to the side surface of the battery cell group.

[0067] Embodiment 2

[0068] This embodiment provides a battery pack, which includes a plurality of battery cells 20 and the battery box in the first embodiment.

[0069] In this embodiment, a plurality of battery cells 20 are installed inside the box frame 10 of the battery box.

[0070] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0071] The embodiment of the present application adopts a method of setting a heat conducting plate 30 and a protective plate 40 at the bottom of the box frame 10. Through the air passage 50 formed between the heat conducting plate 30 and the protective plate 40, when the gas flows through the air passage 50, the gas exchanges heat with the heat dissipation fins 320, thereby cooling the battery cells 20 inside the box frame 10, which is beneficial to improving the heat dissipation efficiency of the battery cells 20; at the same time, by setting the protective plate 40, the heat dissipation fins 320, the box frame 10 and the battery cells 20 are protected to avoid damage to the heat dissipation fins 320, the box frame 10 and the battery cells 20, which may cause the battery box to fail to work or affect the heat dissipation performance.

[0072] The present application increases the area in contact with the gas by providing a plurality of heat dissipation fins 320 . When the gas flows through the heat dissipation fins 320 , the gas takes away the heat on the heat dissipation fins 320 . The heat dissipation fins 320 are of an external leakage structure, which is beneficial to enhancing the heat dissipation efficiency of the battery box.

[0073] In the present application, the bottom plate section of the guard plate 40 is connected to the heat dissipation fins 320. The heat dissipation fins 320 can be used as a structural member. When the bottom plate section of the guard plate 40 is subjected to impact force in a third direction, it collapses and absorbs energy to provide protection, thereby improving the overall stability of the battery box.

[0074] The battery cell 20 of the present application is supported on the heat conducting plate 30 , so that the battery cell 20 is in direct contact with the heat conducting plate 30 , thereby facilitating improving the heat dissipation efficiency of the battery cell 20 .

[0075] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0076] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0077] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0078] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: A box frame (10), wherein the box frame (10) forms an installation space for the battery cell (20); A heat conducting plate (30), the heat conducting plate (30) being arranged at the bottom of the box frame (10), the heat conducting plate (30) having a plurality of heat dissipation fins (320) extending toward a side away from the battery core (20); A protective plate (40), the protective plate (40) being connected to the box frame (10), the protective plate (40) being arranged on a side of the heat conducting plate (30) facing away from the battery core (20), and an air passage (50) being formed between the protective plate (40) and the heat conducting plate (30).

2. The battery box according to claim 1, characterized in that: The air passage (50) is arranged along a first direction, a plurality of the heat dissipation fins (320) are arranged at intervals along a second direction perpendicular to the first direction, and each of the heat dissipation fins (320) extends along the first direction.

3. The battery box according to claim 1, characterized in that: The heat conducting plate (30) comprises a flat plate structure (310) and heat dissipation fins (320); the flat plate structure (310) is arranged at the bottom opening of the box frame (10); and the heat dissipation fins (320) are arranged on a side of the flat plate structure (310) that is away from the battery core (20).

4. The battery box according to claim 3, characterized in that: The guard plate (40) comprises: a bottom plate section, the bottom plate section being spaced apart from the flat plate structure (310), the bottom plate section abutting against an end of the heat dissipation fin (320) away from the battery core (20); Side plate sections are arranged on both sides of the bottom plate section along the second direction, and the side plate sections are arranged between the bottom plate section and the box frame (10).

5. The battery box according to claim 1, characterized in that: At least one heat conducting plate (30) is provided. When a plurality of heat conducting plates (30) are provided, the plurality of heat conducting plates (30) are connected and arranged along a first direction.

6. The battery box according to claim 5, characterized in that: A plurality of the heat conducting plates (30) are provided, and the plurality of heat conducting plates (30) are fixed by welding.

7. The battery case according to any one of claims 1 to 6, characterized in that: The heat conducting plate (30) is fixed to the box frame (10) by welding; and / or The battery box also includes a fastener, and the guard plate (40) is connected to the box frame (10) via the fastener.

8. The battery case according to any one of claims 1 to 6, characterized in that: The battery box also includes a filter, and the filter is arranged at the air inlet and the air outlet of the air passage (50).

9. The battery case according to any one of claims 1 to 6, characterized in that: The battery box also includes: A wind shield (70), wherein the wind shield (70) is detachably arranged on the box frame (10), and the wind shield (70) is used to shield the air inlet and the air outlet of the air passage (50).

10. A battery pack, characterized in that: The battery pack comprises a plurality of battery cells (20) and a battery case according to any one of claims 1 to 9, wherein the plurality of battery cells (20) are installed inside a case frame (10) of the battery case.

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