Battery module, battery pack and new energy automobile

Abstract

The embodiment of the utility model provides a battery module, a battery pack and a new energy automobile, and relates to the technical field of power batteries. The battery module comprises a module tray, a plurality of battery cells and a plurality of heat insulation parts, the module tray is provided with a plurality of mounting grooves, the plurality of battery cells are respectively arranged in the plurality of mounting grooves, the plurality of heat insulation parts are respectively arranged in the plurality of mounting grooves, and the heat insulation parts are positioned between the battery cells and the mounting grooves and are used for separating the battery cells from the mounting grooves. According to the battery module, the problem of chain thermal runaway caused by the fact that high temperature is transferred to peripheral battery cells after the battery cells are subjected to thermal runaway can be prevented, and the safety of the module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery module, a battery pack and a new energy vehicle. Background Art

[0002] For the design of cylindrical battery modules, the existing technology usually adopts the method of setting liquid cooling flat tubes between the battery cells and fixing the battery cells with plastic trays. When a single battery cell has thermal runaway, the liquid cooling system is triggered and the heat of the battery cell is quickly reduced by the liquid in the liquid cooling flat tube, thereby preventing the whole battery pack from thermal runaway.

[0003] However, since the bottom of the cylindrical battery cell needs to be inserted into the round hole of the plastic tray to be fixed, the part of the battery cell inserted into the round hole of the tray cannot contact the liquid cooling flat tube. If the battery cell has thermal runaway, the high temperature of the battery cell in the round hole cannot be quickly reduced, causing the round hole to melt through and transfer heat to the surrounding battery cells, which easily leads to the risk of chain thermal runaway of the surrounding battery cells. Utility Model Content

[0004] The purpose of the utility model is to provide a battery module, a battery pack and a new energy vehicle, which can prevent the chain thermal runaway problem caused by the high temperature being transferred to the surrounding battery cells after the thermal runaway occurs in the battery cell, thereby improving the safety of the module.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a battery module, comprising:

[0007] A module tray, wherein the module tray is provided with a plurality of mounting slots;

[0008] a plurality of battery cells, wherein the plurality of battery cells are respectively disposed in the plurality of mounting grooves; and

[0009] A plurality of heat insulating members are respectively disposed in the plurality of mounting grooves, and the heat insulating members are located between the battery core and the mounting grooves to separate the battery core from the mounting grooves.

[0010] In an optional embodiment, the thermal insulation member is a thermal insulation ring or a thermal insulation coating.

[0011] In an optional embodiment, the thickness of the thermal insulation element is 0.1 mm to 0.5 mm.

[0012] In an optional embodiment, a glue coating groove is formed on the bottom wall of each installation groove.

[0013] In an optional embodiment, a bottom wall of each of the glue coating grooves is provided with an avoidance through hole.

[0014] In an optional embodiment, the module tray includes a bottom plate and a first side plate, a second side plate, a first guard plate and a second guard plate connected to the bottom plate, and the bottom plate is provided with the plurality of mounting grooves;

[0015] The first side plate, the first guard plate, the second side plate and the second guard plate are connected end to end in sequence and are combined with the bottom plate to form a battery cell installation cavity. The multiple battery cells are arranged in the battery cell installation cavity.

[0016] In an optional embodiment, the battery module further includes a plurality of liquid cooling components, and the plurality of liquid cooling components are all disposed in the battery cell installation cavity, and the liquid cooling components are disposed on both sides of each of the battery cells.

[0017] In an optional embodiment, the battery module further includes a first end plate and a second end plate, the first end plate is arranged on a side of the first protective plate away from the battery cell installation cavity, and the second end plate is arranged on a side of the second protective plate away from the battery cell installation cavity;

[0018] The first guard plate is provided with a plurality of first avoidance grooves, and one ends of the plurality of liquid-cooling components are respectively passed through the plurality of first avoidance grooves and are simultaneously connected to the first end plate; the second guard plate is provided with a plurality of second avoidance grooves, and the other ends of the plurality of liquid-cooling components are respectively passed through the plurality of second avoidance grooves and are simultaneously connected to the second end plate.

[0019] In an optional embodiment, the battery module also includes a potting glue, and the potting glue is filled between the multiple battery cells, between the battery cell and the liquid cooling component, between the battery cell and the first end plate and the second end plate, and between the battery cell and the first side plate and the second side plate.

[0020] In a second aspect, the utility model provides a battery pack, comprising the battery module described in any one of the aforementioned embodiments.

[0021] In a third aspect, the utility model provides a new energy vehicle, comprising the battery pack described in the aforementioned embodiment.

[0022] The beneficial effects of the embodiments of the utility model include:

[0023] The battery module includes a module tray, a plurality of battery cells and a plurality of thermal insulation members. The module tray is provided with a plurality of mounting grooves, the plurality of battery cells are respectively arranged in the plurality of mounting grooves, the plurality of thermal insulation members are respectively arranged in the plurality of mounting grooves, and the thermal insulation members are located between the battery cells and the mounting grooves to separate the battery cells from the mounting grooves. By setting the thermal insulation members, when a single battery cell has thermal runaway, the thermal insulation members can play a role of blocking high temperature between the battery cell shell and the mounting groove of the module tray, preventing the plastic tray between the battery cells from melting and transferring high temperature to the surrounding adjacent battery cells, thereby causing the problem of chain thermal runaway, thereby improving the safety of the module.

[0024] The battery pack includes a battery module and has all the beneficial effects of the battery module.

[0025] The new energy vehicle includes a battery pack, which has all the beneficial effects of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a new energy vehicle provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model;

[0029] Figure 3 An exploded view of a battery module provided by an embodiment of the utility model;

[0030] Figure 4 A schematic diagram of the structure of a module tray provided in an embodiment of the utility model;

[0031] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0032] Icons: 1000-new energy vehicle; 1100-battery pack; 100-battery module; 10-module tray; 11-installation slot; 12-glue coating slot; 13-avoidance hole; 14-bottom plate; 15-first side plate; 16-second side plate; 17-first guard plate; 171-first avoidance slot; 18-second guard plate; 181-second avoidance slot; 19-battery cell installation cavity; 20-battery cell; 30-thermal insulation; 40-liquid cooling part; 50-first end plate; 60-second end plate; 70-potting glue; 1200-body. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] As described in the background technology, for the design of cylindrical battery modules, the existing technology usually adopts the method of setting liquid cooling flat tubes between battery cells and fixing the battery cells with plastic trays. When a single battery cell has thermal runaway, the liquid cooling system is triggered, and the heat of the battery cell is quickly reduced by the liquid in the liquid cooling flat tube, thereby preventing the whole battery pack from thermal runaway.

[0040] However, the inventors have discovered that since the bottom of the cylindrical battery cell needs to be inserted into the round hole of the plastic tray to be fixed, the maximum height of the liquid-cooling flat tube is limited by the height between the upper and lower plastic trays of the battery cell, and the battery cell fixing holes on the plastic tray also serve to isolate the battery cell. However, the battery cell part inserted into the round hole of the tray cannot contact the liquid-cooling flat tube. If thermal runaway occurs in the battery cell, the high temperature of the battery cell part in the round hole cannot be quickly reduced, causing the round hole to be melted through by the high temperature and transfer the heat to the surrounding battery cells, easily causing the risk of chain thermal runaway in the surrounding battery cells.

[0041] Based on this, please refer to Figure 1-Figure 5 The embodiment of the utility model provides a battery module 100, a battery pack 1100 and a new energy vehicle 1000, which can effectively improve the above-mentioned technical problems, that is, it can prevent the battery cell 20 from transmitting high temperature to the surrounding battery cells 20 after thermal runaway occurs, thereby improving the safety of the module. The battery module 100, the battery pack 1100 and the new energy vehicle 1000 will be described in detail below.

[0042] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the new energy vehicle 1000 provided in this embodiment is combined with Figure 1 The new energy vehicle 1000 includes a battery pack 1100 and a vehicle body 1200 . The battery pack 1100 is installed on the vehicle body 1200 , thereby providing electric energy for the vehicle body 1200 to realize various functions of the vehicle body 1200 .

[0043] Specifically, the battery pack 1100 includes a battery housing and a battery module 100. The battery module 100 is disposed in the battery housing. The battery module 100 serves as an energy source to provide electrical energy to the vehicle body 1200, thereby realizing the normal operation of the new energy vehicle 1000. For those skilled in the art, the battery pack 1100 may also include other components such as a battery management system, which will not be described in detail in this embodiment.

[0044] For further information, please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of the structure of the battery module 100 provided in this embodiment, Figure 3 The exploded view of the battery module 100 provided in this embodiment is combined with Figure 2 and Figure 3 The battery module 100 includes a module tray 10, a plurality of battery cells 20 and a plurality of heat insulating members 30. The module tray 10 is provided with a plurality of mounting grooves 11. The plurality of battery cells 20 are respectively arranged in the plurality of mounting grooves 11. The plurality of heat insulating members 30 are respectively arranged in the plurality of mounting grooves 11, and the heat insulating members 30 are located between the battery cells 20 and the mounting grooves 11 to separate the battery cells 20 from the mounting grooves 11. By setting the heat insulating members 30, when a single battery cell 20 has thermal runaway, the heat insulating members 30 can play a role of blocking high temperature between the outer shell of the battery cell 20 and the mounting groove 11 of the module tray 10, so as to prevent the plastic tray between the battery cells 20 from melting and transferring the high temperature to the surrounding adjacent battery cells 20, thereby causing the problem of chain thermal runaway, thereby improving the safety of the module.

[0045] Combination Figure 2 It should be noted that, in the present embodiment, the thermal insulation member 30 is specifically a thermal insulation ring, which is disposed in the mounting groove 11 and is in contact with the side wall of the mounting groove 11, and the bottom of the battery cell 20 is disposed in the thermal insulation ring, that is, the thermal insulation ring is sleeved on the battery cell 20.

[0046] The heat-insulating ring is made of high-temperature resistant material, such as mica paper, polyimide tape, Teflon tape or stainless steel, etc., which is not limited in this embodiment.

[0047] Of course, in other embodiments, the heat insulating member 30 may also be a heat insulating coating, that is, when assembling the battery module 100 , high temperature resistant coating may be directly sprayed in the installation groove 11 .

[0048] Optionally, the thickness of the thermal insulation member 30 is 0.1 mm to 0.5 mm. For example, the thickness may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, etc. Of course, in some other embodiments, the thermal insulation member 30 may also be other values, and its specific value needs to be determined according to the actual module design requirements.

[0049] Please refer to Figure 4 , Figure 4 The schematic diagram of the structure of the module tray 10 provided in this embodiment, combined with Figure 3 and Figure 4 Specifically, the module tray 10 includes a bottom plate 14 and a first side plate 15, a second side plate 16, a first guard plate 17 and a second guard plate 18 connected to the bottom plate 14 at the same time. The bottom plate 14 is provided with a plurality of mounting grooves 11; the first side plate 15, the first guard plate 17, the second side plate 16 and the second guard plate 18 are sequentially connected end to end and enclosed with the bottom plate 14 to form a battery cell mounting cavity 19, and a plurality of battery cells 20 are arranged in the battery cell mounting cavity 19.

[0050] It is easy to understand that the first side plate 15 , the second side plate 16 , the first protective plate 17 and the second protective plate 18 can protect the battery cells 20 and prevent them from contacting other components of the battery pack 1100 and causing adverse effects.

[0051] In order to cool down and dissipate the heat from the sides of the battery cell 20, in this embodiment, the battery module 100 further includes a plurality of liquid cooling elements 40, which are all disposed in the battery cell installation cavity 19, and a liquid cooling element 40 is disposed on both sides of each battery cell 20. Figure 3 As shown, it can be understood that the multiple battery cells 20 are divided into multiple rows, and liquid cooling parts 40 are provided on both sides of the battery cells 20 in each row. It can also be understood that a liquid cooling part 40 is provided between two adjacent rows of battery cells 20, and multiple rows of battery cells 20 located at both ends are also respectively provided with a liquid cooling part 40, so as to achieve heat conduction and heat dissipation on both sides of all battery cells 20.

[0052] It should be noted that in this embodiment, the battery cell 20 is specifically a cylindrical battery cell, and accordingly, the liquid cooling member 40 is also specifically a liquid cooling flat tube, which is wavy in shape and can better fit the curved side of the cylindrical battery cell. Of course, in other embodiments, if the battery cell 20 is a square battery cell, the liquid cooling member 40 can be a liquid cooling plate.

[0053] Please continue to combine Figure 3 and Figure 4 In order to better install the liquid cooling member 40, in the present embodiment, the battery module 100 further includes a first end plate 50 and a second end plate 60. The first end plate 50 is arranged on a side of the first protective plate 17 away from the battery cell installation cavity 19, and the second end plate 60 is arranged on a side of the second protective plate 18 away from the battery cell installation cavity 19; the first protective plate 17 is provided with a plurality of first avoidance grooves 171, and one ends of the plurality of liquid cooling members 40 are respectively penetrated through the plurality of first avoidance grooves 171, and are connected to the first end plate 50 at the same time; the second protective plate 18 is provided with a plurality of second avoidance grooves 181, and the other ends of the plurality of liquid cooling members 40 are respectively penetrated through the plurality of second avoidance grooves 181, and are connected to the second end plate 60 at the same time.

[0054] It should be noted that the first end plate 50 and the second end plate 60 are respectively provided with a coolant inlet and a coolant outlet, so as to realize the circulation of the coolant in the liquid cooling element 40 .

[0055] Please refer to Figure 5 , Figure 5 for Figure 4 The local enlarged view of A in the middle, combined with Figure 4 and Figure 5 In order to better fix the battery cell 20 in the mounting groove 11 , a glue coating groove 12 is provided on the bottom wall of each mounting groove 11 . It is easy to understand that glue can be applied in the glue coating groove 12 to better fix the battery cell 20 .

[0056] Furthermore, in order to avoid the explosion-proof valve of the battery cell 20 , a avoiding through hole 13 is opened on the bottom wall of each glue coating groove 12 .

[0057] Please continue to combine Figure 2 and Figure 3 In this embodiment, the battery module 100 also includes a potting glue 70, and the potting glue 70 is filled between the multiple battery cells 20, between the battery cells 20 and the liquid cooling component 40, between the battery cells 20 and the first end plate 50 and the second end plate 60, and between the battery cells 20 and the first side plate 15 and the second side plate 16.

[0058] That is to say, during the assembly process of the battery module 100, the thermal insulation member 30 is first set in the installation groove 11, and then the battery cell 20 is set in the thermal insulation member 30, and then the liquid cooling member 40 is brought into contact with the battery cell 20, and the two ends are respectively connected to the first end plate 50 and the second end plate 60; at this time, there are gaps between the battery cells 20 and the battery cells 20, between the battery cells 20 and the liquid cooling member 40, between the battery cells 20 and the first end plate 50 and the second end plate 60, and between the battery cells 20 and the first side plate 15 and the second side plate 16, and an integrated potting structure is formed by filling these gaps with potting glue 70.

[0059] It should be noted that the potting glue 70 has the functions of insulation, waterproof and moisture-proof, heat conduction, shockproof, sealing and corrosion resistance. In this embodiment, by filling the potting glue 70, it can further play the role of blocking the battery cell 20. When the single battery cell 20 has thermal runaway, the potting glue 70 is not easily melted by high temperature, thereby preventing the other surrounding battery cells 20 from having chain thermal runaway; at the same time, the potting glue 70 can form an integrated structure with other components of the module, and can also improve the overall structural strength of the battery module 100; of course, the potting glue 70 set in this embodiment also has the functions of heat conduction, shockproof, insulation, sealing and corrosion resistance.

[0060] In summary, the embodiments of the utility model provide a battery module 100, a battery pack 1100 and a new energy vehicle 1000. The battery module 100 includes a module tray 10, a plurality of battery cells 20 and a plurality of thermal insulation members 30. The module tray 10 is provided with a plurality of mounting grooves 11. The plurality of battery cells 20 are respectively arranged in the plurality of mounting grooves 11. The plurality of thermal insulation members 30 are respectively arranged in the plurality of mounting grooves 11. The thermal insulation members 30 are located between the battery cells 20 and the mounting grooves 11 to separate the battery cells 20 from the mounting grooves 11. By providing the thermal insulation members 30, when a single battery cell 20 has thermal runaway, the thermal insulation members 30 can play a role in blocking high temperature between the outer shell of the battery cell 20 and the mounting groove 11 of the module tray 10, so as to prevent the plastic tray between the battery cells 20 from melting and transferring the high temperature to the surrounding adjacent battery cells 20, thereby causing the problem of chain thermal runaway, thereby improving the safety of the module.

[0061] The battery pack 1100 includes the battery module 100 , and has all the functions and beneficial effects of the battery module 100 .

[0062] The new energy vehicle 1000 includes a battery pack 1100 , which has all the functions and beneficial effects of the battery pack 1100 .

[0063] The above description is only a specific embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may 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 module, characterized in that: include: A module tray (10), wherein the module tray (10) is provided with a plurality of mounting slots (11); A plurality of battery cells (20), the plurality of battery cells (20) being respectively arranged in the plurality of mounting grooves (11); and A plurality of heat insulating members (30), the plurality of heat insulating members (30) being respectively arranged in the plurality of mounting grooves (11), and the heat insulating members (30) being located between the battery core (20) and the mounting groove (11) so as to separate the battery core (20) from the mounting groove (11).

2. The battery module according to claim 1, characterized in that: The heat insulating member (30) is a heat insulating ring or a heat insulating coating.

3. The battery module according to claim 1, characterized in that: The thickness of the thermal insulation member (30) is 0.1 mm to 0.5 mm.

4. The battery module according to claim 1, characterized in that: The bottom wall of each installation groove (11) is provided with a glue coating groove (12).

5. The battery module according to claim 4, characterized in that: The bottom wall of each of the glue coating grooves (12) is provided with an avoidance through hole (13).

6. The battery module according to claim 1, characterized in that: The module tray (10) comprises a bottom plate (14) and a first side plate (15), a second side plate (16), a first guard plate (17) and a second guard plate (18) connected to the bottom plate (14), wherein the bottom plate (14) is provided with the plurality of mounting grooves (11); The first side plate (15), the first protective plate (17), the second side plate (16) and the second protective plate (18) are connected end to end in sequence and enclose the bottom plate (14) to form a battery cell installation cavity (19), and the plurality of battery cells (20) are arranged in the battery cell installation cavity (19).

7. The battery module according to claim 6, characterized in that: The battery module (100) further comprises a plurality of liquid cooling components (40), wherein the plurality of liquid cooling components (40) are all arranged in the battery cell installation cavity (19), and the liquid cooling components (40) are arranged on both sides of each battery cell (20).

8. The battery module according to claim 7, characterized in that: The battery module (100) further comprises a first end plate (50) and a second end plate (60), wherein the first end plate (50) is arranged on a side of the first protective plate (17) away from the battery cell installation cavity (19), and the second end plate (60) is arranged on a side of the second protective plate (18) away from the battery cell installation cavity (19); The first guard plate (17) is provided with a plurality of first avoidance grooves (171), and one ends of the plurality of liquid cooling components (40) are respectively passed through the plurality of first avoidance grooves (171) and are simultaneously connected to the first end plate (50); the second guard plate (18) is provided with a plurality of second avoidance grooves (181), and the other ends of the plurality of liquid cooling components (40) are respectively passed through the plurality of second avoidance grooves (181) and are simultaneously connected to the second end plate (60).

9. The battery module according to claim 8, characterized in that: The battery module (100) further comprises a potting glue (70), and the potting glue (70) is filled between the plurality of battery cells (20), between the battery cell (20) and the liquid cooling element (40), between the battery cell (20) and the first end plate (50) and the second end plate (60), and between the battery cell (20) and the first side plate (15) and the second side plate (16).

10. A battery pack, characterized in that: A battery module (100) comprising any one of claims 1 to 9.

11. A new energy vehicle, characterized in that: Includes the battery pack (1100) as claimed in claim 10.

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