Protective isolation plate and battery pack

Abstract

The embodiment of the utility model provides a protective isolation plate and a battery pack, and relates to the field of new energy batteries. The protective isolation plate comprises a first plate body and a second plate body which are connected with each other, wherein at least two spaced safety holes are formed in the first plate body, the first plate body is used for being arranged on the upper side of an anti-explosion valve, the safety holes are used for being arranged corresponding to the anti-explosion valve, and the second plate body is used for being arranged on the upper side of a battery cell. In the working process, when a single battery cell is subjected to thermal runaway, the corresponding anti-explosion valve sprays out an ejection object, the first plate body and the second plate body can protect and block the adjacent battery cells, the contact probability of the ejection object and the adjacent battery cells is reduced, short circuit and thermal runaway of the adjacent battery cells caused by the thermal runaway of the single battery cell are further prevented, and the service life of the battery cells is prolonged. Therefore, potential safety hazards of the battery pack are reduced. The battery pack comprises the protective isolation plate and has all functions of the protective isolation plate.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and in particular to a protective isolation plate and a battery pack. Background Art

[0002] During the operation of the battery pack, there is a lack of protection between adjacent battery cells. When thermal runaway occurs in individual battery cells, the spray from the explosion-proof valve can easily cause a short circuit between adjacent battery cells, thereby triggering thermal runaway of adjacent battery cells, posing a major safety hazard. Utility Model Content

[0003] The utility model provides a protective isolation plate and a battery pack, which can protect adjacent battery cells, avoid thermal runaway of a single battery cell causing thermal runaway of adjacent battery cells, and thus reduce the safety risks of the battery pack.

[0004] The embodiment of the present utility model can be implemented as follows:

[0005] An embodiment of the present invention provides a protective isolation plate, which includes:

[0006] A first plate body and a second plate body connected to each other;

[0007] Among them, at least two safety holes spaced apart are opened on the first plate body, the first plate body is used to be arranged on the upper side of the explosion-proof valve, the safety holes are used to be arranged corresponding to the explosion-proof valve, and the second plate body is used to be arranged on the upper side of the battery core.

[0008] Optionally, the second plate is arranged higher than the first plate.

[0009] Optionally, the protective isolation plate further includes a third plate body, wherein the third plate body is connected between the first plate body and the second plate body, and is arranged at an angle with the first plate body and the second plate body.

[0010] Optionally, the third plate is arranged at an angle, and the angles between the third plate and the first plate and the second plate are all obtuse angles.

[0011] Optionally, the protective isolation plate further includes a fourth plate body, which is connected to the bottom surface of the second plate body and is used to support the battery core.

[0012] Optionally, there are two second plates, and the two second plates are symmetrically arranged on both sides of the first plate.

[0013] Optionally, the number of the safety holes is at least three, and the at least three safety holes are arranged at equal intervals.

[0014] Optionally, the opening size of the safety hole is adapted to the end face size of the explosion-proof valve.

[0015] Optionally, the bottom surface of the first plate is coated with a protective layer.

[0016] An embodiment of the present invention further provides a battery pack, comprising:

[0017] At least two battery cells, at least two explosion-proof valves and the protective isolation plate;

[0018] The at least two explosion-proof valves are arranged in a one-to-one correspondence on the at least two battery cells, and the at least two explosion-proof valves are arranged in a one-to-one correspondence with the at least two safety holes.

[0019] The protective isolation plate and battery pack of the present invention have the following beneficial effects, for example:

[0020] The protective isolation plate comprises a first plate and a second plate connected to each other. The first plate is provided with at least two spaced-apart safety holes. The first plate is configured to be positioned above an explosion-proof valve, with the safety holes corresponding to the explosion-proof valve. The second plate is configured to be positioned above a battery cell. During operation, if a single battery cell experiences thermal runaway, its corresponding explosion-proof valve ejects a jet. The first and second plates act as a protective barrier for adjacent battery cells, reducing the likelihood of the jet contacting adjacent cells. This prevents thermal runaway of a single battery cell from causing a short circuit or thermal runaway in adjacent cells, thereby reducing potential safety risks in the battery pack.

[0021] The battery pack includes a protective isolation plate, which has all the functions of a protective isolation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention 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 any creative work.

[0023] Figure 1 This is a schematic structural diagram of the protective isolation plate provided in an embodiment of the present utility model at a first viewing angle;

[0024] Figure 2 This is a schematic structural diagram of the protective isolation plate provided in an embodiment of the present utility model at a second viewing angle;

[0025] Figure 3 This is a working schematic diagram of the protective isolation plate provided in an embodiment of the present utility model.

[0026] Icon: 100-protective isolation plate; 110-first plate; 112-safety hole; 120-second plate; 130-third plate; 140-fourth plate. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] 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 claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0029] 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, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention 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. Therefore, it cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0032] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] Unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0035] As mentioned in the background technology, during the operation of the battery pack, there is a lack of protection between adjacent battery cells. When thermal runaway occurs in individual battery cells, the spray from the explosion-proof valve can easily cause a short circuit between adjacent battery cells, thereby triggering thermal runaway of adjacent battery cells, posing a major safety hazard.

[0036] Please refer to Figure 1-Figure 3 The protective isolation plate 100 and the battery pack provided in the embodiment of the present invention can solve the above problems, which will be described in detail below.

[0037] The protective isolation plate 100 is applied to a battery pack, and includes a first plate body 110 and a second plate body 120 connected to each other;

[0038] Among them, at least two safety holes 112 spaced apart are opened on the first plate 110. The first plate 110 is used to be set on the upper side of the explosion-proof valve. The safety holes 112 are used to be set corresponding to the explosion-proof valve. The second plate 120 is used to be set on the upper side of the battery cell.

[0039] During operation, when a single battery cell experiences thermal runaway, its corresponding explosion-proof valve sprays out a jet, and the first plate 110 and the second plate 120 can serve as a protective barrier for adjacent battery cells, reducing the probability of contact between the jet and adjacent battery cells, thereby preventing the thermal runaway of a single battery cell from causing a short circuit and thermal runaway of adjacent battery cells, thereby reducing the safety risks of the battery pack.

[0040] It should be noted that the number of battery cells in a single battery pack is usually multiple, and the multiple battery cells are arranged in multiple rows and columns, so that the multiple battery cells in the same row correspond to one protective isolation plate 100, because the first plate body 110 of the protective isolation plate 100 is provided with multiple safety holes 112. Because the arrangement of the battery cells is relatively regular, the number of safety holes 112 can be at least three, and at least three safety holes 112 are arranged at equal distances.

[0041] It is worth noting that, in order to ensure that the arrangement of the first plate 110 does not hinder the ejection of the explosion-proof valve, the opening size of the safety hole 112 can be no smaller than the end face size of the explosion-proof valve.

[0042] In this embodiment, in order to avoid obstruction of the spray and improve the protection effect, the opening size of the safety hole 112 can be adapted to the end face size of the explosion-proof valve. In addition, the end face of the explosion-proof valve is elliptical, and the corresponding opening cross-section of the safety hole 112 is also elliptical.

[0043] Of course, in other embodiments of the present invention, the opening size of the safety hole 112 can also be larger than the end face size of the explosion-proof valve. In addition, the opening cross-section of the safety hole 112 can be circular, rectangular, triangular, fan-shaped, or other shapes, and the specific shape is not limited.

[0044] refer to Figure 1 and Figure 2 Because high-pressure gas flows around the battery cell, in order to prevent the high-pressure gas from gathering due to the second plate 120 and affecting the working effect of the battery cell, the second plate 120 can be set higher than the first plate 110.

[0045] It can be understood that the distance between the second plate 120 and the battery cell is greater than the distance between the first plate 110 and the explosion-proof valve, thereby forming an exhaust channel between the second plate 120 and the battery cell, thereby facilitating the discharge of high-pressure gas and preventing the accumulation of high-pressure gas from affecting the working performance of the battery cell.

[0046] Specifically, in order to facilitate the stable connection between the first plate 110 and the second plate 120, the protective isolation plate 100 may also include a third plate 130, which is connected between the first plate 110 and the second plate 120, and is set at an angle to the first plate 110 and the second plate 120.

[0047] In this embodiment, the third plate 130 is a straight plate and is arranged at an angle. The angles between the third plate 130 and the first plate 110 and the second plate 120 are all obtuse angles. In addition, the third plate 130 can also be perpendicular to the first plate 110 and the second plate 120 at the same time, that is, the angles between the third plate 130 and the first plate 110 and the second plate 120 are all right angles. The angles between the third plate 130 and the first plate 110 and the second plate 120 can also be acute angles.

[0048] Of course, in other embodiments of the present invention, the third plate 130 may also be a curved plate, and there is no limitation on the specific curved structure type of the third plate 130 , as long as it is connected between the first plate 110 and the second plate 120 .

[0049] At the same time, in order to prevent the second plate 120 from deflecting near the battery cell in the working state and prevent a negative impact on the flow of high-pressure gas, the protective isolation plate 100 can also include a fourth plate 140, which is connected to the bottom surface of the second plate 120 and is used to support the battery cell.

[0050] In this embodiment, the fourth plate 140 is disposed in the middle of the second plate 120. Of course, in other embodiments of the present invention, the fourth plate 140 may also be disposed on a side of the second plate 120 closer to the first plate 110, or on a side of the second plate 120 farther from the first plate 110. The specific location of the fourth plate 140 on the second plate 120 is not limited.

[0051] In this embodiment, the number of fourth plates 140 is one, and both ends of the fourth plate 140 are arranged flush with both ends of the second plate 120; of course, in other embodiments of the present invention, the number of fourth plates 140 connected to a single second plate 120 can also be two, three, five, eight, etc., and there is no limitation on the specific number of the fourth plates 140; and the fourth plate 140 can be shorter than the second plate 120 or longer than the second plate 120, and there is no limitation on the specific extension length of the fourth plate 140.

[0052] refer to Figure 1 and Figure 2 The number of the second plate bodies 120 in a single protective isolation plate 100 is two, and the two second plate bodies 120 are symmetrically arranged on both sides of the first plate body 110. In addition, the number of the first plate body 110 in a single protective isolation plate 100 is one.

[0053] That is, the number of the third plate bodies 130 in a single protective isolation plate 100 is also two, so that the entire protective isolation plate 100 can have a double-wing structure, which helps to make the structural strength of the entire protective isolation plate 100 higher.

[0054] refer to Figure 1 and Figure 2 In order to further improve the protection effect, a protective layer can be coated on the bottom surface of the first plate body 110. The bottom surface of the first plate body 110 can be understood as the side close to the explosion-proof valve. The protective layer can specifically be a high-temperature resistant material. There is no limitation on the specific material type of the protective layer.

[0055] The present invention also provides a battery pack comprising at least two battery cells, at least two explosion-proof valves, and a protective isolation plate 100. The at least two explosion-proof valves are disposed in a one-to-one correspondence with the at least two battery cells, and the at least two explosion-proof valves are disposed in a one-to-one correspondence with the at least two safety vents 112. The battery pack, including the protective isolation plate 100, possesses all the functions of the protective isolation plate 100.

[0056] Typically, a battery pack includes multiple rows and columns of cells, allowing one protective isolation plate 100 to cover cells in the same row. Consequently, multiple rows of cells require multiple protective isolation plates 100 to cover them uniformly. When multiple protective isolation plates 100 are present, the edges of adjacent protective isolation plates 100 (i.e., the side of the second plate 120 facing away from the first plate 110) can be brought into contact, or the contacting portions can be connected, thereby improving the relative positional stability of the multiple protective isolation plates 100.

[0057] It is worth noting that in order to prevent the explosion-proof valve from being splashed onto the sprayed material of the adjacent explosion-proof valve, a protective layer can also be coated on the end face of the explosion-proof valve. The protective layer is a high-temperature resistant material layer. While protecting the end face of the explosion-proof valve, it will not hinder the explosion-proof spraying operation.

[0058] In summary, the protective isolation plate 100 and the battery pack provided by the embodiments of the present invention have at least the following advantages:

[0059] (1) During operation, when a single battery cell experiences thermal runaway, its corresponding explosion-proof valve ejects a jet, and the first plate 110 and the second plate 120 can act as a protective barrier for the adjacent battery cells, reducing the probability of the jet contacting the adjacent battery cells, thereby preventing the thermal runaway of a single battery cell from causing a short circuit and thermal runaway of the adjacent battery cells, thereby reducing the safety risks of the battery pack.

[0060] (2) By limiting the spacing between the second plate 120 and the battery cell, an exhaust passage for the explosion-proof high-pressure gas to circulate exists between the second plate 120 and the battery cell, thereby facilitating the discharge of the high-pressure gas and preventing the accumulation of high-pressure gas from affecting the working performance of the battery cell.

[0061] (3) By connecting two third plates 130 on both sides of the first plate 110, and connecting the second plate 120 on the side away from the first plate 110, the third plates 130 are also limited to be inclined, so that the overall protective isolation plate 100 has a double-wing structure, which helps to improve the structural strength of the overall protective isolation plate 100 and thus achieve a better protective isolation effect.

[0062] (4) By connecting the fourth plate 140 to the bottom surface of the second plate 120 and making the bottom end of the fourth plate 140 abut against the battery cell, a good supporting effect is provided for the second plate 120, ensuring that the second plate 120 will not be easily deflected during operation, thereby ensuring the flow stability of the high-pressure gas.

[0063] (5) By applying a protective layer on the side of the first plate 110 close to the explosion-proof valve and the end face of the explosion-proof valve, and making the protective layer a high-temperature resistant material layer, the first plate 110 and the explosion-proof valve can be better protected.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A protective isolation board, characterized in that: include: A first plate body (110) and a second plate body (120) connected to each other; The first plate (110) is provided with at least two safety holes (112) spaced apart from each other. The first plate (110) is used to be arranged on the upper side of the explosion-proof valve. The safety holes (112) are used to be arranged corresponding to the explosion-proof valve. The second plate (120) is used to be arranged on the upper side of the battery cell.

2. The protective isolation plate according to claim 1, characterized in that: The second plate body (120) is arranged higher than the first plate body (110).

3. The protective isolation plate according to claim 1, characterized in that: The protective isolation plate further comprises a third plate body (130), wherein the third plate body (130) is connected between the first plate body (110) and the second plate body (120), and is arranged at an angle with the first plate body (110) and the second plate body (120).

4. The protective isolation plate according to claim 3, characterized in that: The third plate (130) is arranged at an angle, and the angles between the third plate (130), the first plate (110), and the second plate (120) are all obtuse angles.

5. The protective isolation plate according to any one of claims 1 to 4, characterized in that: The protective isolation plate further comprises a fourth plate body (140), wherein the fourth plate body (140) is connected to the bottom surface of the second plate body (120) and is used to abut against the battery core.

6. The protective isolation plate according to any one of claims 1 to 4, characterized in that: The number of the second plate bodies (120) is two, and the two second plate bodies (120) are symmetrically arranged on both sides of the first plate body (110).

7. The protective isolation plate according to any one of claims 1 to 4, characterized in that: The number of the safety holes (112) is at least three, and the at least three safety holes (112) are arranged at equal intervals.

8. The protective isolation plate according to any one of claims 1 to 4, characterized in that: The opening size of the safety hole (112) is adapted to the end face size of the explosion-proof valve.

9. The protective isolation plate according to any one of claims 1 to 4, characterized in that: The bottom surface of the first plate (110) is coated with a protective layer.

10. A battery pack, characterized in that: include: At least two battery cells, at least two explosion-proof valves, and the protective isolation plate according to any one of claims 1 to 9; The at least two explosion-proof valves are arranged in a one-to-one correspondence on the at least two battery cells, and the at least two explosion-proof valves are arranged in a one-to-one correspondence with the at least two safety holes (112).

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