Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, the battery pack comprises a battery case, an electrode assembly and a partition plate, the battery case comprises a case body, the case body is a rectangular case, a boss protruding towards the outer side is punched on a first side plate of the case body, an explosion-proof hole is formed in the bottom surface of the boss, and the explosion-proof hole is communicated with the electrode assembly. The first side plate is provided with an explosion-proof hole, the explosion-proof valve is installed at the explosion-proof hole, the electrode assembly is installed in the battery shell, and the partition plate is arranged between the electrode assembly and the first side plate and used for separating the electrode assembly from the first side plate. According to the battery pack disclosed by the embodiment of the utility model, the boss protruding towards the outer side is punched on the first side plate of the shell body, so that the structural strength of the explosion-proof hole can be enhanced, the assembly of the explosion-proof valve can be facilitated, and the assembly efficiency of the explosion-proof valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing.

[0003] Lithium cells are the core components of battery pack safety and assembly, and their structural design is crucial to cell safety. The exhaust effect of lithium batteries in related technologies needs to be improved, and the plate at the explosion-proof valve is prone to deformation, which can easily cause exhaust blockage. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide a battery pack, wherein the battery shell of the battery pack has good exhaust effect and the first side plate at the explosion-proof valve has good structural strength.

[0005] The battery pack according to an embodiment of the utility model includes a battery shell, an electrode assembly and a partition, the battery shell includes: a shell body, the shell body is a rectangular shell, a first side plate of the shell body is stamped with a boss protruding outward, the bottom surface of the boss is provided with an explosion-proof hole, an explosion-proof valve is installed at the explosion-proof hole, the electrode assembly is installed in the battery shell, and the partition is arranged between the electrode assembly and the first side plate, for separating the electrode assembly from the first side plate.

[0006] According to the battery pack of the embodiment of the utility model, when the electrode assembly is in thermal runaway, the high-temperature and high-pressure gas can enter the gap space between the electrode assembly and the first side plate relatively quickly, and then break through the explosion-proof valve to be discharged, with high exhaust efficiency, which can effectively reduce the risk of fire and explosion of the electrode assembly. By stamping a boss protruding outward on the first side plate of the shell body, the structural strength of the explosion-proof hole can be enhanced, which can also facilitate the assembly of the explosion-proof valve and improve the assembly efficiency of the explosion-proof valve.

[0007] The battery pack according to the embodiment of the utility model includes a battery shell and an electrode assembly, and the electrode assembly is installed in the battery shell. When the electrode assembly is in thermal runaway, the high-temperature and high-pressure gas can quickly enter the gap space between the electrode assembly and the first side plate, and then break through the explosion-proof valve to be discharged, with high exhaust efficiency, which can effectively reduce the risk of fire and explosion of the battery pack.

[0008] In addition, the battery pack according to the utility model may also have the following additional technical features:

[0009] In some embodiments of the present invention, the shell body is an integrally formed part.

[0010] In some embodiments of the present invention, both ends of the shell body have openings, and the battery shell further includes a cover plate, which is installed at the openings.

[0011] In some embodiments of the present invention, a pole is installed on the cover plate.

[0012] In some embodiments of the present invention, a support block is provided on a side of the partition facing the first side plate, and the support block is supported between the first side plate and the partition.

[0013] In some embodiments of the present invention, a distance L from the outer periphery of the bottom surface to the outer periphery of the explosion-proof valve satisfies: 0.2 mm ≤ L ≤ 4 mm.

[0014] In some embodiments of the present invention, a plurality of air holes are provided on the partition, and the plurality of air holes are arranged in a matrix.

[0015] The utility model also provides an electrical device having the battery pack of the above embodiment.

[0016] According to the electrical equipment of the embodiment of the utility model, by being provided with the battery pack of the above embodiment, the high-temperature and high-pressure gas can be discharged better when the battery pack has thermal runaway, so that the battery pack is not prone to fire and explosion, which is beneficial to the safety of the electrical equipment.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic structural diagram of a battery pack according to an embodiment of the utility model.

[0020] Figure 2 Detailed description of the invention: FIG. 1 is an exploded view of a battery pack according to an embodiment of the present invention.

[0021] Figure 3 is an exploded view of a battery pack according to another embodiment of the present utility model.

[0022] Figure 4 It is a schematic structural diagram of a partition and an explosion-proof valve of a battery pack according to an embodiment of the utility model.

[0023] Figure 5 It is a cross-sectional view of a battery pack according to an embodiment of the present utility model along the width direction of the partition.

[0024] Figure 6 yes Figure 5 Magnified view of area A.

[0025] Reference numerals:

[0026] Battery case 100,

[0027] Shell body 1, first side plate 11, boss 111, second side plate 12,

[0028] Cover plate 2, explosion-proof valve 3, pole 4,

[0029] Battery pack 1000 , electrode assembly 200 , separator 5 , support block 51 , and vent hole 52 . DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Reference below Figure 1-Figure 6 A battery case 100 according to an embodiment of the present invention is described.

[0034] like Figure 1-Figure 3 As shown, the battery shell 100 according to an embodiment of the utility model includes a shell body 1, the shell body 1 is a rectangular shell, a boss 111 protruding outward is provided on the first side plate 11 of the shell body 1, an explosion-proof hole is provided on the bottom surface of the boss 111, and an explosion-proof valve 3 is installed at the explosion-proof hole.

[0035] Reference Figure 1-Figure 3 As shown, the shell body 1 is an integrally formed part, including a first side plate 11 and a second side plate 12 arranged opposite to each other, the two first side plates 11 are equal in size, the two second side plates 12 are equal in size, the area of ​​the first side plate 11 is smaller than the second side plate 12, the two first side plates 11 and the two second side plates 12 are combined to form a shell body 1 with openings at both ends, there are two cover plates 2, the two cover plates 2 are respectively covered at the two openings, and poles 4 are arranged on the two cover plates 2, one pole 4 can be a positive pole, and the other pole 4 can be a negative pole, and the area of ​​the first side plate 11 is larger than the area of ​​the cover plate 2.

[0036] In the related art, the explosion-proof valve is often installed on the cover plate, while the battery shell 100 of the present application installs the explosion-proof valve 3 on the first side plate 11 having an area larger than the cover plate 2. As a result, the gap space between the electrode assembly 200 and the first side plate 11 is larger than the gap space between the cover plate 2 and the electrode assembly 200. For example, when thermal runaway occurs in the electrode assembly 200, high-temperature and high-pressure gas can enter the gap space between the electrode assembly 200 and the first side plate 11 relatively quickly, and then break through the explosion-proof valve 3 to be discharged. The exhaust efficiency is high, which can effectively reduce the risk of fire and explosion of the electrode assembly 200.

[0037] Further, a boss 111 protruding outward is stamped on the first side plate 11, and an explosion-proof hole is provided on the bottom surface of the boss 111, and the explosion-proof valve 3 is installed at the explosion-proof hole. Here, by making the boss 111 protrude outward, a groove can be formed on the side of the first side plate 11 facing the electrode assembly 200, and the explosion-proof valve 3 can be well installed on the explosion-proof hole from one side of the groove. The assembly method is simple and convenient, and the assembly efficiency can be improved. Further, by providing the boss 111 protruding outward on the first side plate 11, the explosion-proof hole can be increased. The structural strength of the first side plate 11, more specifically, the design of the boss 111 is to enhance the structural strength of the explosion-proof hole, so as to effectively ensure that the explosion-proof valve 3 is not easy to cause the first side plate 11 to deform during assembly. At the same time, when the high-temperature and high-pressure gas flows toward the explosion-proof valve 3, it is not easy to deform the first side plate 11 at the explosion-proof hole. It can be understood that if the first side plate 11 at the explosion-proof hole is deformed, the problem of blocking the explosion-proof hole is likely to occur, affecting the discharge of high-temperature and high-pressure gas, thereby increasing the risk of fire and explosion of the electrode assembly 200. Therefore, the present application can reduce the risk of the first side plate 11 deforming and blocking the explosion-proof hole by increasing the structural strength of the explosion-proof hole, which is beneficial to the discharge of high-temperature and high-pressure gas. At the same time, the structural enhancement of the first side plate 11 at the explosion-proof hole through the boss 111 structure is also beneficial to the thin and light design of the first side plate 11, thereby reducing the weight and cost of the battery shell 100.

[0038] Therefore, according to the battery shell 100 of the embodiment of the utility model, a boss 111 protruding outward is stamped on the first side plate 11 of the shell body 1, which can enhance the structural strength of the explosion-proof hole, facilitate the assembly of the explosion-proof valve 3, and improve the assembly efficiency of the explosion-proof valve 3.

[0039] In some embodiments of the present invention, the shell body 1 is an integrally formed part, that is, the shell body 1 is directly formed into a complete structure through a one-time manufacturing process, for example, the shell body 1 is a metal part, and the shell body 1 is directly formed by casting; for example, the shell body 1 is formed by welding a piece of metal plate after multiple stamping and bending, for example, the shell body 1 is directly formed into a complete structure by injection molding or blow molding of plastic and other materials, and this application does not make any restrictions. The integrally formed shell body 1 has high structural strength, good durability, and good sealing performance. The integral molding process ensures the dimensional accuracy and surface finish of the product, making the appearance of each product more consistent and the quality easier to control.

[0040] In some embodiments of the present invention, Figure 1-Figure 3As shown, both ends of the shell body 1 have openings, and the battery shell 100 also includes a cover plate 2, which is installed at the opening. That is, the electrode assembly 200 can be installed into the shell body 1 from the opening, and then the cover plate 2 is fixedly connected to the shell body 1 to realize the assembly of the battery shell 100, which is simple and convenient to operate. Exemplarily, the cover plate 2 and the shell body 1 can be connected by welding.

[0041] In addition, the explosion-proof valve 3 of the present application is not assembled on the cover plate 2 , which can reduce the difficulty of assembling and producing the cover plate 2 .

[0042] In some embodiments of the present invention, a pole 4 is mounted on the cover plate 2, such as Figure 1-Figure 6 As shown, both ends of the shell body 1 have openings, and two cover plates 2 are provided. The two cover plates 2 are respectively covered at the two openings. The two cover plates 2 can be provided with poles 4. The pole 4 on one cover plate 2 is a positive pole, and the pole 4 on the other cover plate 2 is a negative pole. By arranging the pole 4 on the cover plate 2 and arranging the explosion-proof valve 3 on the first side plate 11, the pole 4 and the explosion-proof valve 3 can be respectively installed on different sides of the battery shell 100, which can reduce the interference between the explosion-proof valve 3 and the pole 4 during design and assembly, and can also avoid the explosion-proof valve 3 from affecting the pole 4 when discharging high-temperature and high-pressure gas. For example, the high-temperature and high-pressure gas causes the battery shell 100 to deform and easily causes the electrode assembly 200 to short-circuit. In other examples, the high-temperature and high-pressure gas causes the battery shell 100 to deform and easily causes the pole 4 to block the explosion-proof valve 3. Therefore, the pole 4 and the explosion-proof valve 3 are respectively installed on different sides of the battery shell 100, which can also reduce the influence of the pole 4 on the explosion-proof valve 3.

[0043] The present invention also provides a battery pack 1000 having the battery shell 100 of the above embodiment.

[0044] like Figure 1-Figure 6 As shown, the battery pack 1000 according to the embodiment of the utility model includes a battery shell 100 and an electrode assembly 200, and the electrode assembly 200 is installed in the battery shell 100. When the electrode assembly 200 is in thermal runaway, the high-temperature and high-pressure gas can quickly enter the gap space between the electrode assembly 200 and the first side plate 11, and then break through the explosion-proof valve 3 to be discharged, with high exhaust efficiency, which can effectively reduce the risk of fire and explosion of the battery pack 1000.

[0045] In some embodiments of the present invention, Figure 1-Figure 6 As shown, the battery pack 1000 further includes a separator 5 , which is disposed between the electrode assembly 200 and the first side plate 11 , and is used to separate the electrode assembly 200 from the first side plate 11 .

[0046] In one example, if Figure 1-Figure 6 As shown, the explosion-proof hole is stamped out of the first side plate 11. Even if the explosion-proof valve 3 is installed at the explosion-proof hole, burrs and other structures are likely to exist at the explosion-proof hole. If the electrode assembly 200 is directly installed in the battery shell 100, the burrs are likely to scratch the electrode assembly 200, thereby causing damage to the electrode assembly 200. By setting a partition 5 between the first side plate 11 and the electrode assembly 200, the partition 5 can better separate the electrode assembly 200 and the first side plate 11, thereby better avoiding the electrode assembly 200 from being damaged by the burrs on the first side plate 11.

[0047] Alternatively, if Figure 1-Figure 6 As shown, a support block 51 is provided on the side of the partition 5 facing the first side plate 11, and the support block 51 is supported between the first side plate 11 and the partition 5. By providing the support block 51, the first side plate 11 and the partition 5 can be separated well, thereby reducing the damage to the first side plate 11 caused by the burrs on the first side plate 11, and also reducing the contact area between the first side plate 11 and the partition 5, thereby reducing the mutual wear between the first side plate 11 and the partition 5.

[0048] Alternatively, if Figure 1-Figure 6 As shown, the support blocks 51 are arranged at both ends of the partition 5, or the support blocks 51 are arranged on both sides of the explosion-proof valve 3. In this way, the support blocks 51 can better support the first side plate 11 at the explosion-proof hole, and can better avoid deformation and damage of the first side plate 11 at the explosion-proof hole.

[0049] In some embodiments of the present invention, the distance L from the support block 51 to the outer periphery of the explosion-proof valve 3 satisfies: 0.2 mm ≤ L ≤ 4 mm. Figure 6 As shown, in the width direction of the partition 5, the distance from the support block 51 to the outer peripheral edge of the explosion-proof valve 3 is L. By designing the above dimensions, a sufficient distance can be provided between the explosion-proof valve 3 and the support block 51, and the support block 51 can better support the first side plate 11 adjacent to the explosion-proof valve 3, with high reliability.

[0050] Optionally, the distance L from the outer periphery to the inner periphery of the bottom surface may be: 0.2 mm, 0.6 mm, 0.9 mm, 1.1 mm, 1.6 mm, 2 mm, 2.5 mm, 2.8 mm, 3 mm, 3.4 mm, or 4 mm.

[0051] Alternatively, if Figure 6 As shown, in the width direction of the partition 5, the size H of the support block 51 satisfies: 0.5mm≤H≤5mm. By designing the size of the support block 51, effective support between the partition 5 and the first side plate 11 can be better met.

[0052] Optionally, the partition 5 is a flat plate, and a plurality of air holes 52 are provided on the partition 5, and the plurality of air holes 52 are arranged in a matrix. Thus, the provision of the air holes 52 can facilitate the discharge of the high-temperature and high-pressure gas generated by the electrode assembly 200, and the matrix arrangement of the plurality of air holes 52 can make the high-temperature and high-pressure gas passing through the partition 5 uniform and stable, which can reduce the impact of the high-temperature and high-pressure gas on the first side plate 11 after it is generated to a certain extent.

[0053] The present invention also provides an electrical device having the battery pack 1000 of the above embodiment.

[0054] According to the electrical equipment of the embodiment of the utility model, by being provided with the battery pack 1000 of the above embodiment, the high-temperature and high-pressure gas can be discharged better when the battery pack 1000 has thermal runaway, so that the battery pack 1000 is not prone to fire and explosion, which is beneficial to the safety of the electrical equipment.

[0055] Optionally, the electrical equipment may be a vehicle, an air conditioner, a television, etc., and this application does not impose any limitation thereto.

[0056] Other structures and operations of the battery case 100, the battery pack 1000 and the electrical device according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0057] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A battery case, the battery case comprising a case body, the case body being a rectangular shell, a boss protruding outward is stamped on a first side plate of the case body, an explosion-proof hole is provided on the bottom surface of the boss, and an explosion-proof valve is installed at the explosion-proof hole; an electrode assembly, the electrode assembly being mounted in the battery case; A separator is disposed between the electrode assembly and the first side plate, and is used to separate the electrode assembly from the first side plate.

2. The battery pack according to claim 1, characterized in that: The shell body is an integrally formed part.

3. The battery pack according to claim 1, characterized in that: Both ends of the shell body have openings, and the battery shell further includes a cover plate installed at the openings.

4. The battery pack according to claim 3, characterized in that: The cover plate is provided with a pole.

5. The battery pack according to claim 1, characterized in that: A support block is provided on one side of the partition plate facing the first side plate, and the support block is supported between the first side plate and the partition plate.

6. The battery pack according to claim 5, characterized in that: The distance L between the support block and the outer periphery of the explosion-proof valve satisfies: 0.2 mm≤L≤4 mm.

7. The battery pack according to claim 1, characterized in that: The partition is provided with a plurality of air holes, and the plurality of air holes are arranged in a matrix.

8. An electrical device, characterized in that: A battery pack comprising any one of claims 1-7.

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