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 lower box body, an upper cover plate, a plurality of battery cells and a plurality of fixing pieces, and the plurality of battery cells are arranged in the lower box body; the plurality of fixing pieces are arranged on the lower box body and are arranged at intervals, a battery cell is arranged between every two adjacent fixing pieces, and the fixing pieces are adhered to the side surfaces of the battery cells; the upper cover plate is arranged on one side, far away from the lower box body, of the battery cell, and the upper cover plate is adhered to the top surface of the battery cell. The battery module can reduce the production cost, is convenient to maintain and improves the working efficiency.

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] With the rapid development of new energy vehicles, power battery technology, which is the power source of new energy vehicles, is also developing rapidly, and the market demand is growing.

[0003] At present, the battery cells in the battery module are usually fixed to the upper and lower cover plates with structural adhesive, which will increase the production cost and make it difficult to repair and replace the battery cells during the maintenance of new energy vehicles, affecting work efficiency. 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 reduce production costs, facilitate maintenance and improve work efficiency.

[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] lower box;

[0008] A plurality of battery cells, wherein the plurality of battery cells are arranged in the lower box;

[0009] A plurality of fixing members, wherein the plurality of fixing members are arranged on the lower box body, and the plurality of fixing members are arranged at intervals, the battery core is arranged between two adjacent fixing members, and the fixing members are bonded to the side surfaces of the battery core; and

[0010] An upper cover plate is arranged on a side of the battery cell away from the lower box body, and the upper cover plate is bonded to the top surface of the battery cell.

[0011] In an optional embodiment, the upper cover plate includes a first side plate, a top plate and a second side plate connected in sequence, the first side plate and the second side plate are respectively arranged on both sides of the plurality of fixing members along the spacing arrangement direction of the plurality of fixing members, and the first side plate and the second side plate are both connected to the lower box body;

[0012] The top plate is arranged on a side of the battery core away from the lower box body and is bonded to the top surface of the battery core.

[0013] In an optional embodiment, the battery module further includes a first end plate and a second end plate, the first end plate and the second end plate are respectively connected to two ends of the plurality of fixing members, and the first end plate and the second end plate are both connected to the lower box body.

[0014] In an optional embodiment, the fixing member is a heating and cooling flat tube.

[0015] In an optional embodiment, the lower box body is provided with a pressure relief chamber and a plurality of pressure relief holes that are all connected to the pressure relief chamber, and the plurality of pressure relief holes are provided in a one-to-one correspondence with the plurality of battery cells.

[0016] In an optional embodiment, the lower box body includes a bottom plate and a pressure relief chamber partition, a portion of the bottom plate is connected to the pressure relief chamber partition, and another portion is spaced apart from the pressure relief chamber partition to form the pressure relief chamber; the pressure relief chamber partition is provided with the multiple pressure relief holes.

[0017] In an optional embodiment, the pressure relief chamber partition is provided with a plurality of protrusions in a direction toward the bottom plate, and the plurality of protrusions are arranged at intervals.

[0018] In an optional embodiment, the battery module further includes an epoxy board, which is disposed between the lower box and the battery cell, and the epoxy board is provided with a plurality of through holes, and the plurality of through holes are disposed in one-to-one correspondence with the plurality of pressure relief holes.

[0019] In a second aspect, the utility model provides a battery pack, comprising a shell and the battery module described in any one of the aforementioned embodiments, wherein the lower box is arranged on the shell.

[0020] In a third aspect, the utility model provides a new energy vehicle, comprising the battery pack described in the aforementioned embodiment.

[0021] The beneficial effects of the embodiments of the utility model include:

[0022] The battery module includes a lower box, an upper cover, a plurality of battery cells and a plurality of fixings, wherein the plurality of battery cells are arranged in the lower box; the plurality of fixings are arranged in the lower box, and the plurality of fixings are arranged at intervals, a battery cell is arranged between two adjacent fixings, and the fixings are bonded to the sides of the battery cells; the upper cover is arranged on the side of the battery cell away from the lower box, and the upper cover is bonded to the top surface of the battery cell. In other words, the fixings can fix the sides of the battery cell by bonding with the sides of the battery cell; and the upper cover is bonded to the top surface of the battery cell and can fix the top of the battery cell; the three sides of the battery cell can be bonded and fixed, and the bottom of the battery cell does not need to be glued, thereby saving the amount of glue used. When the battery cell is repaired and replaced in the later stage, the battery cell can be easily pulled out because there is no restraint at the bottom. Therefore, the battery module can reduce production costs, facilitate maintenance, and improve work efficiency.

[0023] The battery pack includes the battery module and has all the beneficial effects of the battery module.

[0024] The new energy vehicle includes the battery pack and has all the beneficial effects of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 A schematic diagram of the structure of a new energy vehicle provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model;

[0028] Figure 3 An exploded view of a battery module provided by an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the structure of the lower box provided by an embodiment of the utility model;

[0030] Figure 5 A partial structural schematic diagram of the lower box provided in an embodiment of the utility model.

[0031] Icons: 1000-new energy vehicle; 1100-battery pack; 100-battery module; 10-lower box; 11-pressure relief chamber; 12-pressure relief hole; 13-bottom plate; 131-exhaust hole; 14-pressure relief chamber partition; 141-protrusion; 20-battery cell; 30-fixing part; 40-upper cover plate; 41-first side plate; 42-top plate; 43-second side plate; 50-first end plate; 60-second end plate; 70-epoxy plate; 71-through hole; 1200-body. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] As described in the background technology, the battery cells in the current battery module are usually fixed to the upper and lower cover plates with structural adhesive, which will increase the production cost and make it difficult to repair and replace the battery cells during the maintenance of new energy vehicles, affecting work efficiency.

[0039] Based on this, please refer to Figure 1-Figure 5 The embodiments of the utility model provide 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, they can reduce production costs, facilitate maintenance and improve work efficiency.

[0040] It should be noted that the first direction mentioned in the following content is Figure 1-Figure 5 The X direction is shown in Figure 1-Figure 5 The Y direction is shown in the figure, and the third direction is Figure 1-Figure 5 The Z direction is shown in the figure. The battery module 100, the battery pack 1100 and the new energy vehicle 1000 will be described in detail below.

[0041] 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 .

[0042] It can be understood that the battery pack 1100 includes a battery module 100 and a shell, and the battery module 100 is arranged in the shell, that is, the battery module 100 serves as a power source in the battery pack 1100 to provide electrical energy for the vehicle body 1200. For those skilled in the art, it is easy to know that the number of battery modules 100 in the battery pack 1100 can be one or more. When there are multiple battery modules 100, the energy density of the battery pack 1100 can be increased by connecting the battery modules 100 in series and parallel, that is, the storage capacity of the entire battery pack 1100 can be increased. Of course, the battery pack 1100 can also include other devices such as a battery management module and a liquid cooling module.

[0043] Specifically, 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 lower box body 10, an upper cover plate 40, a plurality of battery cells 20 and a plurality of fixing members 30, wherein the plurality of battery cells 20 are arranged in the lower box body 10; the plurality of fixing members 30 are arranged in the lower box body 10, and the plurality of fixing members 30 are arranged at intervals, a battery cell 20 is arranged between two adjacent fixing members 30, and the fixing members 30 are bonded to the side surfaces of the battery cells 20; the upper cover plate 40 is arranged on the side of the battery cell 20 away from the lower box body 10, and the upper cover plate 40 is bonded to the top surface of the battery cell 20.

[0044] That is, the fixing member 30 can fix the side of the battery cell 20 by bonding with the side of the battery cell 20; and the upper cover plate 40 can fix the top of the battery cell 20 by bonding with the top surface of the battery cell 20; the three sides of the battery cell 20 can be bonded and fixed, and the bottom of the battery cell 20 does not need to be glued, thereby saving the amount of glue used. When the battery cell 20 is repaired and replaced later, the battery cell 20 can be easily pulled out because there is no bottom constraint. Therefore, the battery module 100 can reduce production costs, facilitate maintenance, and improve work efficiency.

[0045] It should be noted that, in this embodiment, the fixing member 30 is specifically a heating and cooling flat tube, which can constrain and fix the two sides of the battery cell 20, reduce the number of parts for fixing the bottom of the battery cell 20, and can also pass coolant to cool or heat the battery cell 20. Of course, in other embodiments, the fixing member 30 can also be other fixing structures such as a binding band or a heating wire.

[0046] It is easy to understand that when the fixing member 30 is a heating and cooling flat tube, the contact surface of the heating and cooling flat tube and the battery cell 20 can be bonded by a thermally conductive gel, so that the two sides of the battery cell 20 can be wrapped to improve the heat conduction or heating efficiency. In addition, the upper cover plate 40 and the top of the battery cell 20 can be bonded by a structural adhesive.

[0047] Please continue to combine Figure 3 In order to better fix the fixing member 30, in this embodiment, the battery module 100 further includes a first end plate 50 and a second end plate 60, the first end plate 50 and the second end plate 60 are respectively connected to the two ends of the plurality of fixing members 30, and the first end plate 50 and the second end plate 60 are both connected to the lower box body 10. Figure 3As shown, specifically, a plurality of fixing members 30 are spaced apart along a first direction, and a first end plate 50 and a second end plate 60 are spaced apart along a second direction, wherein the first direction forms an angle with the second direction.

[0048] That is to say, after the fixing member 30 is connected and fixed by the first end plate 50 and the second end plate 60, the first end plate 50 and the second end plate 60 are respectively connected to the lower box body 10, and the connection method between the first end plate 50 and the second end plate 60 and the lower box body 10 can be fixed by bolts, so that they can be disassembled and repaired later.

[0049] Furthermore, the upper cover plate 40 includes a first side plate 41, a top plate 42 and a second side plate 43 which are connected in sequence. The first side plate 41 and the second side plate 43 are respectively arranged on both sides of the plurality of fixing members 30 along the spacing direction of the plurality of fixing members 30, that is, they are spaced along the first direction, and the first side plate 41 and the second side plate 43 are both connected to the lower box body 10; the top plate 42 is arranged on the side of the battery cell 20 away from the lower box body 10, and is bonded to the top surface of the battery cell 20.

[0050] like Figure 3 As shown, the upper cover plate 40 is an integrated structure similar to the "X" shape, and the first side plate 41 and the second side plate 43 can constrain the two outermost fixing members 30 of the multiple fixing members 30, and work together with the top plate 42 to fix the three sides of the battery cell 20; at the same time, the first side plate 41 and the second side plate 43 are also connected to the lower box body 10, which can play a role in fixing the module and further improve the overall stability of the battery module 100. It is easy to understand that when the fixing member 30 is a heating and cooling flat tube, it can also play a role in constraining the deformation of the two outermost heating and cooling flat tubes, further reducing the number of other components and reducing costs.

[0051] Please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the lower box body 10 provided in this embodiment, Figure 5 This is a partial structural diagram of the lower box 10 provided in this embodiment, combined with Figure 4 and Figure 5 In the case of thermal runaway of the battery cell 20, in order to release the generated gas, in this embodiment, the lower box body 10 is provided with a pressure relief chamber 11 and a plurality of pressure relief holes 12 connected to the pressure relief chamber 11, and the plurality of pressure relief holes 12 are provided one-to-one with the plurality of battery cells 20. It can be understood that the explosion-proof valve of the battery cell 20 is provided at the pressure relief hole 12, and when thermal runaway occurs, the gas enters the pressure relief hole 12 and the pressure relief chamber 11 in sequence through the explosion-proof valve for discharge.

[0052] Specifically, the lower box body 10 includes a bottom plate 13 and a pressure relief chamber partition 14, a portion of the bottom plate 13 is connected to the pressure relief chamber partition 14, and the other portion is spaced apart from the pressure relief chamber partition 14 to form a pressure relief chamber 11, that is, spaced apart from the pressure relief chamber partition 14 along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; the pressure relief chamber partition 14 is provided with a plurality of pressure relief holes 12. In other words, the pressure relief chamber partition 14 has the functions of carrying the battery cell 20 and relieving pressure, thereby simplifying the number of components of the battery module 100 and reducing costs.

[0053] In order to improve the bearing strength of the pressure relief chamber partition 14, in this embodiment, further, the pressure relief chamber partition 14 is provided with a plurality of protrusions 141 in the direction of the bottom plate 13, and the plurality of protrusions 141 are arranged at intervals, such as Figure 5 As shown, by supporting the protrusions 141 in contact with the bottom plate 13, the bearing strength of the pressure relief chamber partition 14 is improved while simplifying the design, eliminating the need for module support beams and other components, reducing the overall weight of the battery module 100, and further reducing the production cost.

[0054] In order to facilitate the discharge of the gas in the pressure relief chamber 11, please continue to combine Figure 4 and Figure 5 The bottom plate 13 is provided with a plurality of exhaust holes 131, and the plurality of exhaust holes 131 are spaced apart on one side of the bottom plate 13, so that the gas entering the pressure relief chamber 11 can be discharged from the side of the bottom plate 13 without affecting the normal operation of the battery cell 20 or other components in the battery module 100.

[0055] Please continue to combine Figure 3 In order to improve the insulation effect of the battery cell 20, the battery module 100 also includes an epoxy plate 70, which is arranged between the lower box 10 and the battery cell 20. In the present embodiment, in order to match the battery cell 20 with the pressure relief hole 12, the epoxy plate 70 is provided with a plurality of through holes 71, and the plurality of through holes 71 are arranged in a one-to-one correspondence with the plurality of pressure relief holes 12. That is to say, the bottom of the battery cell 20 is arranged on the epoxy plate 70, and the explosion-proof valve of the battery cell 20 corresponds to the pressure relief hole 12 through the through hole 71, thereby facilitating the gas pressure relief and discharge.

[0056] In summary, the embodiments of the present invention provide a battery module 100, a battery pack 1100 and a new energy vehicle 1000. The battery module 100 includes a lower box body 10, an upper cover plate 40, a plurality of battery cells 20 and a plurality of fixing members 30. The plurality of battery cells 20 are arranged in the lower box body 10; the plurality of fixing members 30 are arranged in the lower box body 10, and the plurality of fixing members 30 are arranged at intervals, a battery cell 20 is arranged between two adjacent fixing members 30, and the fixing members 30 are bonded to the side surfaces of the battery cells 20; the upper cover plate 40 is arranged on the side of the battery cell 20 away from the lower box body 10, and the upper cover plate 40 is bonded to the top surface of the battery cell 20. That is to say, the fixing member 30 is able to fix the side of the battery cell 20 by being bonded to the side of the battery cell 20; and the upper cover plate 40 is bonded to the top surface of the battery cell 20 and can fix the top of the battery cell 20; the three sides of the battery cell 20 can be bonded and fixed, and the bottom of the battery cell 20 does not need to be glued, thereby saving the amount of glue used. When the battery cell 20 is repaired and replaced at a later stage, the battery cell 20 can be easily pulled out because there is no restraint from the bottom.

[0057] Therefore, the battery module 100 can reduce production costs, facilitate maintenance, and improve work efficiency. Furthermore, by setting an upper cover plate 40 similar to a "J"-shaped one-piece molding, it can play a fixing role on the three sides of the battery cell 20, constrain the two outermost fixing members 30 and improve the overall stability of the battery module 100, and reduce the number of other components to reduce costs; in addition, by setting a protrusion 141 on the pressure relief chamber partition 14, while improving the bearing strength of the pressure relief chamber partition 14, it can also simplify the design, eliminate the setting of components such as the module support beam, reduce the overall weight of the battery module 100, and further reduce the production cost.

[0058] The battery pack 1100 includes a shell and a battery module 100 . The battery module 100 is disposed in the shell. The battery pack 1100 has all the functions and beneficial effects of the battery module 100 .

[0059] The new energy vehicle 1000 includes a battery pack 1100 , which has all the functions and beneficial effects of the battery pack 1100 .

[0060] 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: Lower box(10); A plurality of battery cells (20), wherein the plurality of battery cells (20) are arranged in the lower box (10); A plurality of fixing members (30), wherein the plurality of fixing members (30) are arranged on the lower box (10), and the plurality of fixing members (30) are arranged at intervals, the battery core (20) is arranged between two adjacent fixing members (30), and the fixing members (30) are bonded to the side surfaces of the battery core (20); and An upper cover plate (40), the upper cover plate (40) being arranged on a side of the battery cell (20) away from the lower box body (10), and the upper cover plate (40) being bonded to the top surface of the battery cell (20).

2. The battery module according to claim 1, characterized in that: The upper cover plate (40) comprises a first side plate (41), a top plate (42) and a second side plate (43) which are connected in sequence, the first side plate (41) and the second side plate (43) are respectively arranged on both sides of the plurality of fixing members (30) along the spacing arrangement direction of the plurality of fixing members (30), and the first side plate (41) and the second side plate (43) are both connected to the lower box body (10); The top plate (42) is arranged on a side of the battery core (20) away from the lower box (10), and is bonded to the top surface of the battery core (20).

3. The battery module according to claim 1, 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) and the second end plate (60) are respectively connected to two ends of the plurality of fixing members (30), and the first end plate (50) and the second end plate (60) are both connected to the lower box body (10).

4. The battery module according to claim 1, characterized in that: The fixing member (30) is a heating and cooling flat tube.

5. The battery module according to claim 1, characterized in that: The lower box body (10) is provided with a pressure relief chamber (11) and a plurality of pressure relief holes (12) each in communication with the pressure relief chamber (11); the plurality of pressure relief holes (12) are arranged in a one-to-one correspondence with the plurality of battery cells (20).

6. The battery module according to claim 5, characterized in that: The lower box body (10) comprises a bottom plate (13) and a pressure relief chamber partition (14); a portion of the bottom plate (13) is connected to the pressure relief chamber partition (14), and another portion is spaced apart from the pressure relief chamber partition (14) to form the pressure relief chamber (11); the pressure relief chamber partition (14) is provided with the plurality of pressure relief holes (12).

7. The battery module according to claim 6, characterized in that: The pressure relief chamber partition (14) is provided with a plurality of protrusions (141) in a direction toward the bottom plate (13), and the plurality of protrusions (141) are arranged at intervals.

8. The battery module according to claim 5, characterized in that: The battery module (100) further comprises an epoxy plate (70), wherein the epoxy plate (70) is arranged between the lower box (10) and the battery cell (20), and the epoxy plate (70) is provided with a plurality of through holes (71), wherein the plurality of through holes (71) are arranged in a one-to-one correspondence with the plurality of pressure relief holes (12).

9. A battery pack, characterized in that: It comprises a shell and a battery module (100) according to any one of claims 1 to 8, wherein the lower box (10) is arranged on the shell.

10. A new energy vehicle, characterized in that: Includes the battery pack (1100) as claimed in claim 9.

Images