Protective plate and battery module

Abstract

The utility model discloses a protection plate and a battery module. The protection plate is used for the battery module, the battery module is provided with a body, and the body is provided with an anti-explosion valve; the protection plate comprises a plate body and a cover plate. The plate body is arranged at the top end of the body and provided with a first through hole correspondingly communicated with the pressure relief end of the anti-explosion valve. The cover plate comprises a cover body and a connecting part; the cover body is located in the first through hole or arranged towards the first through hole so as to shield the pressure relief end of the anti-explosion valve. One end of the connecting part is fixedly connected with the cover body, and the other end is fixedly connected with the plate body; at least two connecting parts are arranged at intervals; and when the explosion-proof valve releases pressure, the pressure acts on the cover plate to break the connecting part. The protection plate not only can play a protection role, but also does not influence the normal use of the explosion-proof valve.

Description

Technical Field

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

[0002] For safety reasons, explosion-proof valves need to be installed in the battery cells to prevent the battery cells in the battery module from exploding due to excessive internal pressure. The battery cell's tabs are located at the top, so an integrated busbar needs to be installed at the top of the battery cell. In order to prevent electric shock, dust and foreign objects from damaging the integrated busbar, a protective plate needs to be installed on the top of the integrated busbar.

[0003] However, the pressure relief end of the explosion-proof valve in the battery cell is arranged toward the protective plate. When the explosion-proof valve releases pressure, if the protective plate is not blown open, the protective plate will affect the normal use of the explosion-proof valve, posing a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology, and to provide a protective plate which can play a protective role without affecting the normal use of the explosion-proof valve; and a battery module having the protective plate.

[0005] In order to achieve the above objectives, the present invention and its related embodiments adopt the following technical solutions but are not limited to the following solutions:

[0006] The first technical scheme and its related embodiments relate to a protective plate, which is used for a battery module, wherein the battery module is provided with a main body, and the main body is provided with an explosion-proof valve; the protective plate includes a plate body and a cover body; the plate body is installed at the top end of the main body, and is provided with a first through hole corresponding to the pressure relief end of the explosion-proof valve; the cover plate includes a cover body and a connecting part; the cover body is located in the first through hole or is arranged toward the first through hole to shield the pressure relief end of the explosion-proof valve; one end of the connecting part is fixedly connected to the cover body, and the other end is fixedly connected to the plate body; there are at least two connecting parts and they are arranged at intervals; when the explosion-proof valve releases pressure, it acts on the cover plate to break the connecting part.

[0007] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the cover body is located in the first through hole, and its outer edge forms a gap with the hole wall of the first through hole; the connecting portion is located in the gap and is strip-shaped; one end of the connecting portion is fixedly connected to the outer edge of the cover body, and the other end is fixedly connected to the hole wall of the first through hole.

[0008] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution, wherein the cover plate is flush with the upper surface of the plate body.

[0009] The fourth technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the thickness of the connecting portion is smaller than the thickness of the cover body.

[0010] The fifth technical scheme and its related embodiments relate to a protective plate, which is used for a battery module. The battery module is provided with a main body, and the main body is provided with an explosion-proof valve. The protective plate includes a plate body and a cover plate. The plate body is installed at the top end of the main body and is provided with a first through hole corresponding to the pressure relief end of the explosion-proof valve; the cover plate includes a cover body and a connecting part; the cover body is located in the first through hole or is arranged toward the first through hole to shield the pressure relief end of the explosion-proof valve; the connecting part connects the plate body and the cover body; the thickness of the connecting part is less than the thickness of the cover body; when the explosion-proof valve releases pressure, it acts on the cover plate to break the connecting part.

[0011] The sixth technical solution is based on the fifth technical solution and is a preferred embodiment of the fifth technical solution, wherein the cover plate is located in the first through hole.

[0012] The seventh technical solution is based on the fifth technical solution and is a preferred embodiment of the fifth technical solution, wherein the cover plate is flush with the upper surface of the plate body.

[0013] The eighth technical solution and its related embodiments relate to a battery module, comprising a main body and a protective plate as described in one of the above technical solutions one to seven; the main body is provided with an explosion-proof valve.

[0014] The ninth technical solution is based on the eighth technical solution and is a preferred embodiment of the eighth technical solution, wherein the main body includes an integrated busbar and a plurality of battery cells; each of the battery cells is arranged along a first direction, and each of the battery cells is provided with an explosion-proof valve; the integrated busbar extends along the first direction and is provided at the top of each of the battery cells; the integrated busbar is provided with a second through hole that is connected to the pressure relief end of each explosion-proof valve in a one-to-one correspondence; the plate body is installed on the integrated busbar; the number of the first through holes is the same as the number of the second through holes, and they are connected in a one-to-one correspondence; the number of the cover plates is the same as the number of the second through holes, and they are arranged in a one-to-one correspondence.

[0015] From the above description of the utility model and its specific embodiments, it can be seen that, compared with the prior art, the technical solution of the utility model and its related embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In the first technical solution and related embodiments, the plate is installed on the body to isolate the top of the body from the outside world, which has a protective effect, prevents dust and foreign objects from falling and affecting use, and can prevent electric shock. The cover shields the pressure relief end of the explosion-proof valve and protects the explosion-proof valve. Since the cover body is fixedly connected to the plate body by at least two spaced-apart connecting parts, the size of each connecting part can be set as small as possible and be weaker. When the explosion-proof valve releases pressure and applies force to the cover plate, the connecting part can be broken, and the explosion-proof valve can release pressure through the first through hole, so it will not affect the normal use of the explosion-proof valve. Compared with the prior art, since the prior art does not provide through holes and cover plates, when the explosion-proof valve releases pressure, if the protective plate is not blown open, the corresponding liquid and gas will accumulate inside the battery module, causing damage to internal parts and even further explosion hazards. However, in the present application, when the explosion-proof valve releases pressure, the corresponding liquid and gas are released to the outside of the battery module through the first through hole, which can prevent the liquid and gas from running around inside the battery module during pressure release, causing damage to the battery module and explosion hazards.

[0017] In the second technical solution and related embodiments, the cover body is located in the first through hole, and the connecting portion is located in the gap, so that the cover plate does not protrude from the plate body, does not occupy additional space, and is easier to process.

[0018] In the third technical solution and its related embodiments, the cover plate is flush with the upper surface of the plate body, which is more beautiful.

[0019] In the fourth technical solution and its related embodiments, the thickness of the connecting portion is smaller than the thickness of the cover body, so that the force of breaking the connecting portion is smaller, which is more conducive to the normal use of the explosion-proof valve.

[0020] In the fifth technical solution and its related embodiments, the plate is installed on the main body to isolate the top of the main body from the outside world, which has a protective effect on the integrated busbar, prevents dust and foreign objects from falling and affecting use, and can prevent electric shock. The cover body shields the pressure relief end of the explosion-proof valve and protects the explosion-proof valve. Since the thickness of the connecting part is less than the thickness of the cover body and is weaker, when the explosion-proof valve releases pressure and applies force to the cover plate, the connecting part can be broken, and the explosion-proof valve can release pressure through the first through hole, so it will not affect the normal use of the explosion-proof valve. Compared with the prior art that does not set through holes and cover plates, when the explosion-proof valve releases pressure, the corresponding liquid and gas are released to the outside of the battery module through the first through hole in the present application, which can prevent the liquid and gas from running around inside the battery module during pressure relief, causing damage to the battery module and explosion and other dangers.

[0021] In the sixth technical solution and its related embodiments, the cover plate is located in the first through hole, does not protrude from the plate body, and does not occupy additional space.

[0022] In the seventh technical solution and its related embodiments, the cover plate is flush with the upper surface of the plate body, which is more beautiful.

[0023] In the eighth technical solution and its related embodiments, the battery mold has the above-mentioned protective plate, and thus has all the above-mentioned beneficial effects.

[0024] In the ninth technical solution and its related embodiments, the second through hole, the first through hole and the cover plate are arranged one by one corresponding to each explosion-proof valve. When an explosion-proof valve releases pressure, it will only act on the corresponding cover plate without affecting each other, which is more humane. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a battery module according to an embodiment;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of a protective plate according to an embodiment;

[0028] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0029] Figure 4 This is a schematic diagram of the mechanism of an implementation method in Example 2.

[0030] Description of main reference numerals:

[0031] Battery module 1; battery cell 2; integrated busbar 3; second through hole 31; supporting seat 32; plate body 4; first through hole 41; cover plate 5; cover body 51; connecting portion 52; first direction 6. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0034] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0035] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0036] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0037] Embodiment 1:

[0038] like Figure 1 and Figure 2 As shown, the battery module 1 is provided with a body and a protective plate, and the body is provided with an explosion-proof valve (not shown in the figure). Specifically, the body includes an integrated busbar 3 and a plurality of battery cells 2. Each battery cell 2 is arranged along the first direction 6, and each battery cell 2 is provided with an explosion-proof valve. The integrated busbar 3 extends along the first direction 6 and is arranged at the top of the battery cell 2. The integrated busbar 3 is provided with a second through hole 31 that is connected to the pressure relief end of each explosion-proof valve in a one-to-one correspondence. The upper surface of the integrated busbar 3 is also provided with a plurality of supporting seats 32, and the supporting seats 32 are provided with two rows. The two rows of supporting seats 32 are arranged at intervals along the first direction 6.

[0039] like Figure 2 and 3 As shown, the protective plate includes a plate body 4 and a cover plate 5 .

[0040] like Figure 2 and 3 As shown, the plate body 4 is installed at the top of the body, that is, installed on the integrated busbar 3; the protective plate is located on each support seat 32 and is fixed to the support seat 32 by fasteners. The plate body 4 is provided with a first through hole 41 corresponding to the pressure relief end of each explosion-proof valve. The number of the first through holes 41 is the same as the number of the second through holes 31, and they are connected one by one.

[0041] like Figure 2 and3 As shown, the number of cover plates 5 is the same as the number of second through holes 31, and they are arranged in one-to-one correspondence. Each cover plate 5 includes a cover body 51 and a connecting portion 52. The cover body 51 is located in the first through hole 41 or is arranged toward the first through hole 41 to shield the pressure relief end of the explosion-proof valve. One end of the connecting portion 52 is fixedly connected to the cover body 51, and the other end is fixedly connected to the plate body 4. There are at least two connecting portions 52 and they are arranged at intervals. When the explosion-proof valve releases pressure, it acts on the cover plate 5 to break the connecting portion 52. In this embodiment, the breaking of the connecting portion 52 includes one of the three situations: the breaking of the middle part of the connecting portion 52, the breaking of the connection between the connecting portion 52 and the cover body 51, and the breaking of the connection between the connecting portion 52 and the plate body 4.

[0042] In this embodiment, the shapes of the first through holes 41 and the second through holes 31 are not limited, and the sizes of the first through holes 41 and the second through holes 31 are adapted to the outlets of the pressure relief ends of the explosion-proof valves.

[0043] In one implementation of this embodiment, Figure 3 As shown, the cover body 51 is located in the first through hole 41, and its outer edge forms a gap with the hole wall of the first through hole 41. The connecting portion 52 is located in the gap and is strip-shaped. One end of the connecting portion 52 is fixedly connected to the outer edge of the cover body 51, and the other end is fixedly connected to the hole wall of the first through hole 41. In addition, the cover plate 5 is flush with the upper surface of the plate body 4.

[0044] In this embodiment, the cover body 51 is located in the first through hole 41, and the connecting portion 52 is located in the gap, so that the cover plate 5 does not protrude from the plate body 4, does not occupy additional space, and is easier to process. The cover plate 5 is flush with the upper surface of the plate body 4 and is more beautiful. In an embodiment of this embodiment (not shown in the figure), the cover body 51 is located above the upper surface of the plate body 4 and is arranged toward the first through hole 41. The connecting portion 52 is strip-shaped, extending in the horizontal direction, and one end is fixedly connected to the cover body 51, and the other end is fixedly connected to the plate body 4.

[0045] Furthermore, the thickness of the connecting portion 52 is smaller than the thickness of the cover body 51 .

[0046] In this embodiment, if Figures 1 to 3As shown, the plate 4 is installed on the main body to isolate the integrated busbar 3 at the top of the main body from the outside world, which has a protective effect on the integrated busbar 3, prevents dust and foreign objects from falling and affecting the use, and can prevent electric shock. The cover 51 covers the pressure relief end of the explosion-proof valve and protects the explosion-proof valve. Since the cover 51 is fixed to the plate 4 through at least two spaced connection parts 52, the size of each connection part 52 can be set as small as possible and weaker; when the explosion-proof valve releases pressure and applies force to the cover 5, the connection part 52 can be broken, and the explosion-proof valve can release pressure through the first through hole, so it will not affect the normal use of the explosion-proof valve. Compared with the prior art that does not set a through hole and a cover 5, when the explosion-proof valve releases pressure, the corresponding liquid and gas are released to the outside of the battery module 1 through the first through hole, which can prevent the liquid and gas from running around inside the battery module 1 during pressure relief, causing damage to the battery module 1 and explosion and other dangers. Furthermore, the thickness of the connection portion 52 is smaller than that of the cover body 51, so that the force of breaking the connection portion 52 is smaller, which is more conducive to the normal use of the explosion-proof valve. The second through hole 31, the first through hole 41 and the cover plate 5 are arranged one by one with each explosion-proof valve. When an explosion-proof valve releases pressure, it will only act on the corresponding cover plate 5 without affecting each other, which is more humane.

[0047] Embodiment 2:

[0048] The main difference between this embodiment and the second embodiment lies in the structure of the connecting portion 52 of the protection plate. The protection plate of this embodiment includes a plate body 4 and a cover plate 5.

[0049] The plate body 4 is mounted on the top of the main body and is provided with a first through hole 41 corresponding to the pressure relief end of the explosion-proof valve. The mounting method of the plate body 4 is the same as that of the first embodiment.

[0050] The cover body 51 includes a cover body 51 and a connecting portion 52. The cover body 51 is located in the first through hole 41 or is arranged toward the first through hole 41 to shield the pressure relief end of the explosion-proof valve. The connecting portion 52 connects the plate body 4 and the cover body 51, and the thickness of the connecting portion 52 is less than the thickness of the cover body 51. When the explosion-proof valve releases pressure, it acts on the cover plate 5 to break the connecting portion 52. The cover plate 5 is located in the first through hole 41 and is flush with the upper surface of the plate body 4.

[0051] The connection portion 52 of this embodiment is different from that of the first embodiment in that Figure 4 As shown, the connection part 52 of this embodiment does not need to be arranged at intervals, and only needs to be thinner than the thickness of the cover body 51. For example, the connection part 52 of this embodiment can be arranged around the outer edge of the cover body 51, and the connection part 52 is fixedly connected to the hole wall of the first through hole 41 to shield the first through hole 41 to shield the pressure relief end of the explosion-proof valve.

[0052] In this embodiment, the plate 4 is installed on the body to isolate the top of the body from the outside world, and has a protective effect on the integrated busbar 3, preventing dust and foreign objects from falling and affecting the use, and can prevent electric shock. The cover 51 covers the pressure relief end of the explosion-proof valve and protects the explosion-proof valve. Since the thickness of the connecting portion 52 is less than the thickness of the cover 51, it is weaker. When the explosion-proof valve releases pressure and applies force to the cover 5, the connecting portion 52 can be broken, and the explosion-proof valve can release pressure through the first through hole 41, so it will not affect the normal use of the explosion-proof valve. Compared with the prior art that does not set a through hole and a cover 5, when the explosion-proof valve releases pressure, the corresponding liquid and gas are released to the outside of the battery module 1 through the first through hole 41 in this application, which can prevent the liquid and gas from running around inside the battery module 1 during pressure relief, causing damage to the battery module 1 and explosion and other dangers. The cover 5 is located in the first through hole 41, does not protrude from the plate 4, and does not occupy additional space. The cover 5 is flush with the upper surface of the plate 4, which is more beautiful.

[0053] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A protective plate, used for a battery module (1), wherein the battery module (1) is provided with a body, and the body is provided with an explosion-proof valve; characterized in that: include A plate body (4) is mounted on the top of the main body and is provided with a first through hole (41) corresponding to and communicating with the pressure relief end of the explosion-proof valve; a cover plate (5) comprises a cover body (51) and a connecting portion (52); the cover body (51) is located in the first through hole (41) or is arranged toward the first through hole (41) to shield the pressure relief end of the explosion-proof valve; one end of the connecting portion (52) is fixedly connected to the cover body (51), and the other end is fixedly connected to the plate body (4); at least two connecting portions (52) are provided and are arranged at intervals; when the explosion-proof valve releases pressure, the connecting portion (52) is broken by acting on the cover plate (5).

2. A protective plate as claimed in claim 1, characterized in that: The cover body (51) is located in the first through hole (41), and a gap is formed between the outer edge of the cover body and the hole wall of the first through hole (41); The connecting portion (52) is located in the gap and is strip-shaped; one end of the connecting portion (52) is fixedly connected to the outer edge of the cover body (51), and the other end is fixedly connected to the hole wall of the first through hole (41).

3. A protective plate as claimed in claim 2, characterized in that: The cover plate (5) is flush with the upper surface of the plate body (4).

4. A protective plate as claimed in claim 1, characterized in that: The thickness of the connecting portion (52) is smaller than the thickness of the cover body (51).

5. A protective plate, used for a battery module (1), wherein the battery module (1) is provided with a body, wherein the body is provided with an explosion-proof valve, wherein: include A plate body (4) is mounted on the top of the main body and is provided with a first through hole (41) corresponding to and communicating with the pressure relief end of the explosion-proof valve; a cover plate (5) comprises a cover body (51) and a connecting portion (52); the cover body (51) is located in the first through hole (41) or is arranged toward the first through hole (41) to shield the pressure relief end of the explosion-proof valve; the connecting portion (52) connects the plate body (4) and the cover body (51); the thickness of the connecting portion (52) is less than the thickness of the cover body (51); when the explosion-proof valve releases pressure, it acts on the cover plate (5) to break the connecting portion (52).

6. A protective plate as claimed in claim 5, characterized in that: The cover plate (5) is located in the first through hole (41).

7. A protective plate as claimed in claim 5, characterized in that: The cover plate (5) is flush with the upper surface of the plate body (4).

8. A battery module (1), characterized in that: It comprises a body and a protective plate as claimed in any one of claims 1 to 7; The body is provided with an explosion-proof valve.

9. A battery module (1) according to claim 8, characterized in that: The body comprises an integrated busbar (3) and a plurality of battery cells (2); Each of the battery cells (2) is arranged along a first direction (6), and each of the battery cells (2) is provided with an explosion-proof valve; The integrated busbar (3) extends along the first direction (6) and is arranged on the top of each of the battery cells (2); the integrated busbar (3) is provided with second through holes (31) which are in one-to-one correspondence with the pressure relief ends of each of the explosion-proof valves; The plate body (4) is mounted on the integrated busbar (3); the number of the first through holes (41) is the same as the number of the second through holes (31), and they are connected in a one-to-one correspondence; The number of the cover plates (5) is the same as the number of the second through holes (31), and they are arranged in a one-to-one correspondence.

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