Battery module and vehicle

Abstract

The invention discloses a battery module and a vehicle. The battery module comprises a battery and a protection assembly, and an anti-explosion valve is arranged at one end of the battery; the protection assembly comprises a first protection plate and a second protection plate, the first protection plate is connected to the battery, the first protection plate is provided with a pressure relief hole corresponding to the anti-explosion valve, the second protection plate is connected to the side, opposite to the battery, of the first protection plate, and the second protection plate is provided with an avoiding hole corresponding to the pressure relief hole; the protection assembly further comprises a third protection plate, the third protection plate is connected to the side, back on to the battery, of the second protection plate so as to cover the pressure relief hole, and the connection strength between the first protection plate and the second protection plate is larger than that between the second protection plate and the third protection plate. According to the protection assembly, the third protection plate is arranged, so that the anti-explosion valve can be protected, the probability that the second protection plate is separated from the first protection plate can be reduced, and the protection capacity of the protection assembly can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and more particularly to a battery module and a vehicle. Background Art

[0002] The explosion-proof valve is an important structure of the power battery. It can be opened after the battery undergoes thermal runaway, so that the high-temperature, high-pressure gas and particulate matter inside the battery can be discharged from the explosion-proof valve in time. In order to prevent the sprayed high-temperature gas and particulate matter from diffusing randomly and damaging other structures of the battery, some current battery modules are provided with an inner protection plate and an outer protection plate that can withstand high temperatures. The inner protection plate is attached to one end of the battery where the explosion-proof valve is located, and a pressure relief hole is provided corresponding to the explosion-proof valve. The outer protection plate is connected to the outside of the inner protection plate, and a weak area is provided at the position corresponding to the pressure relief hole. When the battery undergoes thermal runaway, the high-temperature gas and particulate matter inside can be guided by the pressure relief hole to break through the weak area, realizing the directional spraying of gas and matter. However, due to the relatively large spraying pressure, it is easy to cause separation between the outer protection plate and the inner protection plate, allowing the high-temperature gas and particulate matter to enter from the separation part between the two, thereby damaging other battery structures between the inner and outer protection plates. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a battery module that can enhance the protection ability of the protection component.

[0004] The present invention also provides a vehicle using the battery module.

[0005] According to the battery module in the first aspect of the present invention, it includes: a battery, with an explosion-proof valve provided at one end of the battery; a protection component, including a first protection plate and a second protection plate. The first protection plate is connected to the battery, and the first protection plate has a pressure relief hole provided corresponding to the explosion-proof valve. The second protection plate is connected to the side of the first protection plate facing away from the battery, and the second protection plate has an avoidance hole provided corresponding to the pressure relief hole; wherein, the protection component further includes a third protection plate, the third protection plate is connected to the side of the second protection plate facing away from the battery to cover the pressure relief hole, and the connection strength between the first protection plate and the second protection plate is greater than the connection strength between the second protection plate and the third protection plate.

[0006] The battery module according to the embodiment of the present invention has at least the following beneficial effects: By providing the third protective plate, the protection component can not only protect the explosion-proof valve but also reduce the probability of separation between the second protective plate and the first protective plate, which helps improve the protection ability of the protection component.

[0007] In other embodiments of the present invention, the first protective plate includes a first main body portion and a protruding portion. The first main body portion is connected to the battery, and the first main body portion is provided with the pressure relief hole. The protruding portion is connected to the main body portion and surrounds the pressure relief hole, and the protruding portion extends in a direction away from the battery. The second protective plate includes a second main body portion and a first connecting portion. The second main body portion is connected to the first protective plate through the first connecting portion, and the first connecting portion is provided with the avoidance hole. Wherein, the protruding portion passes through the avoidance hole so that the side of the protruding portion facing away from the battery is higher than the side of the first connecting portion facing the battery.

[0008] In other embodiments of the present invention, the second protective plate includes a second main body portion and a first connecting portion. The second main body portion is connected to the first protective plate through the first connecting portion, and the first connecting portion is provided with the avoidance hole. Wherein, the second main body portion protrudes in a direction away from the battery relative to the first connecting portion, so that the second main body portion and the first connecting portion define a guiding cavity, and the side of the second main body portion facing away from the battery is higher than the side of the third protective plate facing away from the battery.

[0009] In other embodiments of the present invention, along the projection direction from the protection component to the battery, the projection of the second protective plate on the battery partially overlaps with the projection of the first protective plate on the battery.

[0010] In other embodiments of the present invention, the second protective plate includes a second main body portion and a first connecting portion. The second main body portion is connected to the first protective plate through the first connecting portion, and the first connecting portion is provided with the avoidance hole. Wherein, the projection of the second main body portion on the battery is at least partially located outside the projection of the first protective plate on the battery. The battery module further includes a functional device electrically connected to the battery, and the functional device is disposed between the second main body portion and the battery.

[0011] In other embodiments of the present invention, the battery further includes a battery cell and a pole column electrically connected to the battery cell. Wherein, the functional device is configured as a conductive member, and the conductive member is electrically connected to the pole column. And / or, the functional device is configured as a circuit board, and the circuit board is electrically connected to the pole column.

[0012] In other embodiments of the present invention, the second main body portion protrudes away from the battery relative to the first connecting portion, so as to form an installation cavity between the second main body portion and the battery, and the functional device is arranged in the installation cavity.

[0013] In other embodiments of the present invention, the third protection plate is provided with a weakening area corresponding to the pressure relief hole.

[0014] In other embodiments of the present invention, the connection area between the first protection plate and the second protection plate is larger than the connection area between the second protection plate and the third protection plate.

[0015] The vehicle according to the embodiment of the second aspect of the present invention includes the battery module described above.

[0016] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0017] The following will further illustrate the present invention in conjunction with the drawings and embodiments, where: Figure 1 is a schematic diagram of a battery module in the related art; Figure 2 is a three-dimensional schematic diagram of the battery module in the embodiment of the present invention; Figure 3 is Figure 1 a partial schematic diagram of the battery module in; Figure 4 is Figure 1 a cross-sectional view of the battery module in; Figure 5 is Figure 4 a partial schematic diagram of the battery module in.

[0018] Reference Signs: Cover sheet 1, pressure relief valve 11, inner protection plate 2, through hole 21, outer protection plate 3, blasting area 31; Battery module 10; Battery 100, battery housing 110, cover 120, explosion-proof valve 121, terminal 122; Protection assembly 200, first protection plate 210, pressure relief hole 211, first main body portion 212, protruding portion 213, inner plate member 214, outer plate member 215, second protection plate 220, avoidance hole 221, second main body portion 222, first connecting portion 223, third protection plate 230, weakening area 231, third main body portion 232, second connecting portion 233, guiding cavity 201, installation cavity 202; Functional device 300, conductive member 310, and circuit board 320. Detailed implementation manners

[0019] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. This 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, and therefore should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0023] In the description of the present invention, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0024] Refer to Figure 1, which shows a schematic diagram of the connection between a single cell and a protection component in the related art. As shown in the figure, the single cell includes a cover sheet 1, and the protection component includes an inner protection plate 2 and an outer protection plate 3. The inner protection plate 2 is attached to the upper side of the cover sheet 1, and a through hole 21 is provided at a position corresponding to the pressure relief valve 11 of the cover sheet 1. The outer protection plate 3 is attached to the upper side of the inner protection plate 2, and a bursting area 31 is provided at a position corresponding to the pressure relief valve 11. When the battery undergoes thermal runaway, the high-temperature gas and particulate matter inside first break through the pressure relief valve 11, are guided by the through hole 21 and ejected in a specific direction, and break through the bursting area 31, thereby achieving pressure relief. However, due to the relatively large ejection pressure, it is easy for the outer protection plate 3 and the inner protection plate 2 to separate during the process of breaking through the bursting area 31, allowing the high-temperature gas and particulate matter to enter from the separation part between the two, and further damaging other battery structures between the inner and outer protection plates. Based on this, the embodiment of the present invention proposes a battery module that can improve the above problems and enhance the protection ability of the battery.

[0025] Referring to Figure 2 , the battery module 10 includes a battery 100 and a protection component 200. The protection component 200 is used to protect other batteries or other functional devices (such as conductive parts, circuit boards, etc.) in the battery module when thermal runaway occurs inside a certain battery 100. Exemplarily, the battery module 10 includes a plurality of batteries 100, and the plurality of batteries 100 are arranged according to a certain rule. For example Figure 2 as shown, the plurality of batteries 100 are divided into two groups in the left-right direction, and the batteries 100 within each group are distributed in the front-back direction.

[0026] An explosion-proof valve 121 is provided at one end of the battery 100. When thermal runaway occurs inside the battery 100, gas and internal substances can be ejected from the explosion-proof valve 121 to prevent the pressure inside the battery 100 from becoming too large and causing an explosion. As a typical battery structure, it specifically includes a battery housing 110, a cover 120, and an electric core. Taking a rectangular battery as an example, the battery housing 110 is usually set as a rectangular housing with one end open. The cover 120 is connected to the open end of the battery housing 110 by welding or other means, thereby jointly defining an inner cavity with the battery housing 110. The electric core is arranged in the inner cavity, and the cover 120 is provided with an explosion-proof valve 121. In some embodiments, the cover 120 is further provided with a terminal post 122. One end of the terminal post 122 is located inside the inner cavity and is connected to the tab of the electric core, and the other end is exposed outside the battery for realizing the electrical connection between the electric core and external electrical components. Specifically, the terminal post 122 includes a positive terminal post and a negative terminal post. The positive terminal post is connected to the positive tab of the electric core, and the negative terminal post is connected to the negative tab of the electric core.

[0027] Without additional protection, when a thermal runaway occurs in a certain battery 100, the ejected high-temperature gas and particulate matter will further damage other batteries 100 or other functional components of the battery module 10, accelerating the runaway of the entire module. Based on this, the battery module of this embodiment further includes a protection component 200. Referring to Figures 3 to 5 , the protection component 200 includes a first protection plate 210 and a second protection plate 220, which are stacked together to jointly achieve the protection function.

[0028] Among them, the first protection plate 210 is connected to the battery 100. Specifically, when the battery 100 adopts the aforementioned typical structure, the first protection plate 210 is connected to the cover 120 (for the convenience of description, the connection and positional relationship between the protection component 200 and the battery 100 will be described based on the cover 120 hereinafter). Exemplarily, the lower end surface of the first protection plate 210 is in close contact with the upper end surface of the cover 120. The first protection plate 210 has a pressure relief hole 211 corresponding to the explosion-proof valve 121. Exemplarily, the shape of the pressure relief hole 211 is adapted to the shape of the explosion-proof valve 121, and the area of the pressure relief hole 211 is equal to or slightly larger than the size of the explosion-proof valve 121. When a thermal runaway occurs inside the battery 100, after the high-temperature gas and particulate matter break through the explosion-proof valve 121, they will be guided by the hole wall of the pressure relief hole 211 and ejected upward in a specific direction, which can prevent the high-temperature gas and particulate matter from spreading in any direction after ejection.

[0029] The second protection plate 220 is connected to the side of the first protection plate 210 facing away from the cover 120. Exemplarily, the lower end surface of the second protection plate 220 is in close contact with the upper end surface of the first protection plate 210 and is fixed by means such as bonding and welding. The second protection plate 220 has an avoidance hole 221 corresponding to the pressure relief hole 211. Exemplarily, the shape of the avoidance hole 221 is adapted to the shape of the pressure relief hole 211, and the area of the avoidance hole 221 is equal to or slightly larger than the size of the pressure relief hole 211, so as to prevent the second protection plate 220 from obstructing the ejection of the gas and matter inside the battery 100.

[0030] In the above structure, the first protection plate 210 is directly in contact with the cover 120, and can direct the ejected gas and matter through the pressure relief hole 211. The second protection plate 220 mainly plays a shielding function, that is, after the gas and matter ejected from the pressure relief hole 211 fall back, they will fall on the second protection plate 220 and will not damage other batteries shielded by the second protection plate 220 or other functional components of the battery module 10. Based on this, both the first protection plate 210 and the second protection plate 220 are made of materials that can withstand high temperatures. Exemplarily, the first protection plate 210 is made of high-temperature resistant plastic, and the second protection plate 220 is made of mica.

[0031] In this embodiment, the protection component 200 further includes a third protection plate 230. The third protection plate 230 is connected to the side of the second protection plate 220 facing away from the cover 120. Exemplarily, the lower end surface of the third protection plate 230 is in close contact with the upper end surface of the second protection plate 220 and is fixed by means such as bonding, welding, and hot riveting. The third protection plate 230 can cover the pressure relief hole 211. In this way, even if a certain battery 100 undergoes thermal runaway, the ejected high-temperature gas and substances will be blocked by the third protection plate 230 and will not damage the explosion-proof valve 121 of other batteries. For the battery that has undergone thermal runaway, the area of the third protection plate 230 corresponding to the explosion-proof valve 121 can break open under pressure and will not hinder the discharge of the gas and substances inside the battery. In addition, in this embodiment, the connection strength between the first protection plate 210 and the second protection plate 220 is greater than the connection strength between the second protection plate 220 and the third protection plate 230, so that when the impact force of the gas and substances inside the battery is relatively large, the connection part between the third protection plate 230 and the second protection plate 220 can be damaged prior to the connection part between the second protection plate 220 and the first protection plate 210, avoiding the separation between the second protection plate 220 and the first protection plate 210 and preventing high-temperature gas and substances from entering the space between the second protection plate 220 and the cover 120.

[0032] Based on the above, by providing the third protection plate 230, the protection component 200 can not only protect the explosion-proof valve 121 but also reduce the probability of separation between the second protection plate 220 and the first protection plate 210, which helps to improve the protection ability of the protection component 200.

[0033] It should be noted that the first protection plate 210 can be of an integral structure or a split structure. For example, Figure 4 as shown, the first protection plate 210 includes an inner plate member 214 and an outer plate member 215. The inner plate member 214 is connected to the cover 120, and the outer plate member 215 is connected to the side of the inner plate member 214 facing away from the cover 120. The inner plate member 214 and the outer plate member 215 can be connected by means such as secondary injection molding, adhesives, heat melting, riveting, and ultrasonic welding. When the first protection plate 210 includes the inner plate member 214 and the outer plate member 215, the "connection strength between the first protection plate 210 and the second protection plate 220" mentioned above specifically refers to the connection strength between the outer plate member 215 and the second protection plate 220.

[0034] On the basis of the foregoing embodiment, with reference to Figure 3, in some embodiments of the present invention, the connection area between the first protection plate 210 and the second protection plate 220 is larger than the connection area between the second protection plate 220 and the third protection plate 230. When the same connection method is adopted for the three, the above setting can make the connection strength between the first protection plate 210 and the second protection plate 220 greater than the connection strength between the second protection plate 220 and the third protection plate 230. In other embodiments, different connection methods can also be adopted for the three to achieve this purpose.

[0035] Based on the foregoing embodiments, in some embodiments of the present invention, referring to Figures 3 to 5 , the first protection plate 210 includes a first main body portion 212 and a protruding portion 213. The first main body portion 212 is connected to the cover 120, and the first main body portion 212 is provided with a pressure relief hole 211. Exemplarily, the first main body portion 212 is attached to the upper end surface of the cover 120. The protruding portion 213 is connected to the first main body portion 212 and surrounds the pressure relief hole 211, and the protruding portion 213 extends in a direction away from the cover 120. Thus, the guiding hole defined by the protruding portion 213 communicates with the pressure relief hole 211 and together forms a pressure relief channel, thereby extending the guiding distance of the first protection plate 210 for high-temperature gas and particulate matter. It should be noted that when the first protection plate 210 includes the aforementioned inner plate member 214 and outer plate member 215, the flat portion of the inner plate member 214 and the outer plate member 215 together form the first main body portion 212, and the flange portion of the inner plate member 214 forms the protruding portion 213.

[0036] The second protection plate 220 includes a second main body portion 222 and a first connecting portion 223. The second main body portion 222 is connected to the first protection plate 210 through the first connecting portion 223, and the first connecting portion 223 is provided with an avoidance hole 221. Exemplarily, the first connecting portion 223 is set as a flat plate structure, which is attached to and fixed to the upper end surface of the first main body portion 212. When the first protection plate 210 includes the aforementioned inner plate member 214 and outer plate member 215, the first connecting portion 223 is specifically attached to the upper end surface of the outer plate member 215.

[0037] In this embodiment, the protruding portion 213 passes through the avoidance hole 221, so that the side of the protruding portion 213 facing away from the cover 120 (such as Figure 5 the upper side in Figure 5 ) is higher than the side of the first connecting portion 223 facing the cover 120 (such as Figure 5 the lower side in Figure 5 ). The side of the first connecting portion 223 facing the cover 120 is the side where the first connecting portion 223 is connected to the first main body portion 212. In other words, the protruding portion 213 will be higher than the connection portion between the first protection plate 210 and the second protection plate 220, so as to reduce the probability that high-temperature gas and particulate matter directly impact the connection portion and cause the separation of the first protection plate 210 and the second protection plate 220, which helps to improve the protection ability.

[0038] In some more specific embodiments, the side of the convex portion 213 facing away from the cover 120 (e.g., Figure 5 the upper side in Figure 5 ) is higher than the side of the first connecting portion 223 facing away from the cover 120 (e.g.,

[0039] ) in this way, it can further keep the high-temperature gas and particulate matter away from the connection part of the first protection plate 210 and the second protection plate 220. Figures 3 to 5 On the basis of the foregoing embodiments, in some embodiments of the present invention, referring to

[0040] , the third protection plate 230 includes a third main body portion 232 and a second connecting portion 233. The third main body portion 232 is connected to the second protection plate 220 through the second connecting portion 233. Exemplarily, the second connecting portion 233 is arranged as a flat plate structure and is attached to and fixed to the first connecting portion 223 of the second protection plate 220. The third main body portion 232 covers the pressure relief hole 211 to play a role in protecting the explosion-proof valve 121. Figure 4 It should be noted that when the convex portion 213 is higher than the first connecting portion 223 as shown in

[0041] , the third main body portion 232 is arranged to protrude in a direction away from the cover 120 relative to the second connecting portion 233 to avoid the convex portion 213. Figures 3 to 5 On the basis of the foregoing embodiments, in some embodiments of the present invention, referring to

[0042] , the second protection plate 220 includes a second main body portion 222 and a first connecting portion 223. The second main body portion 222 is connected to the first protection plate 210 through the first connecting portion 223, and the first connecting portion 223 is provided with an avoidance hole 221. This part of the structure can be understood with reference to the foregoing embodiments.

[0043] Based on the foregoing embodiments, in some embodiments of the present invention, along the projection direction from the protection component 200 to the battery 100, that is, the height direction of the battery, the projection of the second protection plate 220 on the cover 120 partially overlaps with the projection of the first protection plate 210 on the cover 120. In other words, a part of the second protection plate 220 overlaps with the first protection plate 210, and the other part does not overlap with the first protection plate 210 to play a further shielding role. As described above, the first protection plate 210 is mainly used to restrict the ejection direction of gas and substances, and its main structure is concentrated near the explosion-proof valve 121. The shielding area can be set smaller to save materials, while the second protection plate 220 plays a major shielding role and the shielding area is set larger. The two are set as a split structure to reduce the complexity of the structure and facilitate molding. Taking Figure 2 as an example, the explosion-proof valve 121 is arranged at the center position of the cover 120, and the two pole columns 122 are distributed on opposite sides of the explosion-proof valve 121. The left part of the second protection plate 220 shields the left area of each cover 120 of the same group of batteries 100, and the right part of the second protection plate 220 shields the right area of each cover 120 of the same group of batteries 100. It should be noted that the left part and the right part of the second protection plate 220 can be a split structure or connected as an integral structure.

[0044] In some more specific embodiments, referring to Figures 3 to 5 , the second protection plate 220 includes a second main body portion 222 and a first connection portion 223. The second main body portion 222 is connected to the first protection plate 210 through the first connection portion 223, and the first connection portion 223 is provided with an avoidance hole 221. This part of the structure can be understood with reference to the foregoing embodiments.

[0045] In this embodiment, the projection of the second main body portion 222 on the cover 120 is at least partially located outside the projection of the first protection plate 210 on the cover 120. It should be noted that the projection of the second main body portion 222 being located outside the projection of the first protection plate 210 should be understood as the projections of the two not overlapping or partially overlapping, rather than one being located outside the other. The battery module 10 further includes a functional device 300 electrically connected to the battery 100. The functional device 300 is arranged between the second main body portion 222 and the cover 120. That is, the second protection plate 220 of this embodiment can shield the functional device 300 through the second main body portion 222 to prevent high-temperature gas and particulate matter from damaging it.

[0046] Among them, the functional device 300 may include a conductive member 310, which is used to achieve electrical connection between the batteries 100. Exemplarily, the conductive member 310 is set as a copper bar or an aluminum bar. One end of the conductive member 310 is connected to the positive electrode post of one battery 100 by means of welding or the like, and the other end is connected to the negative electrode post of the adjacent battery 100, so as to realize the series connection of the batteries 100. It can be understood that by adjusting the connection relationship of the conductive member 310, the parallel connection of the batteries 100 can also be realized. In some more specific embodiments, after the conductive member 310 is connected to the electrode post 122, the conductive member 310 can press the first protective plate 210 against the cover 120, so as to realize the close fit between the first protective plate 210 and the cover 120.

[0047] The functional device 300 may also include a circuit board 320, which is electrically connected to the electrode post 122, takes power from the battery core and is used to collect parameters such as the temperature and voltage of the battery module. When the functional device 300 further includes a conductive member 310, the circuit board 320 can be electrically connected to the electrode post 122 through the conductive member 310.

[0048] When the second protective plate 220 includes a second main body portion 222 and a first connecting portion 223, in some embodiments of the present invention, referring to Figures 3 to 5 , the second main body portion 222 protrudes in a direction away from the cover 120 relative to the first connecting portion 223, so as to form an installation cavity 202 between the second main body portion 222 and the cover 120. The functional device 300 is arranged in the installation cavity 202, which can avoid direct contact with the ejected high-temperature gas and particulate matter. Combining the foregoing, setting the second main body portion 222 to protrude in a direction away from the cover 120 relative to the first connecting portion 223 can not only form a guiding cavity 201 for restricting the ejection direction of gas and matter on the outside through the second main body portion 222 and the first connecting portion 223, but also form an installation cavity 202 for installing the functional device 300 with the cover 120 on the inside, so as to realize the integration of functions through a simple structure.

[0049] On the basis of the foregoing embodiments, in some embodiments of the present invention, referring to Figure 4 、 Figure 5 , the third protective plate 230 is provided with a weakening area 231 corresponding to the pressure relief hole 211. The weakening area 231 can reduce the difficulty of the gas and matter breaking through and facilitate the release of pressure. In some specific embodiments, the wall thickness of the weakening area 231 is smaller than that of other parts to reduce the strength of the weakening area 231; in other specific embodiments, the weakening area 231 is provided with a notch that is easy to break.

[0050] In the second aspect of the embodiments of the present invention, a vehicle is further provided. The vehicle can be a private car, such as a sedan, an SUV, an MPV or a pickup truck, etc. The vehicle can also be an operating vehicle, such as a minibus, a bus, a light truck or a large trailer, etc. The vehicle can be a fuel vehicle or a new energy vehicle. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle. In this embodiment, the vehicle includes the battery module in the foregoing embodiments.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery module, characterized in that: include: A battery, wherein one end of the battery is provided with an explosion-proof valve; A protection assembly, comprising a first protection plate and a second protection plate, wherein the first protection plate is connected to the battery and has a pressure relief hole corresponding to the explosion-proof valve, and the second protection plate is connected to a side of the first protection plate facing away from the battery and has an avoidance hole corresponding to the pressure relief hole; Wherein, the protective assembly also includes a third protective plate, which is connected to the side of the second protective plate facing away from the battery to cover the pressure relief hole, and the connection strength between the first protective plate and the second protective plate is greater than the connection strength between the second protective plate and the third protective plate.

2. The battery module according to claim 1, characterized in that: The first protective plate includes a first main body and a protruding portion, wherein the first main body is connected to the battery and is provided with the pressure relief hole, the protruding portion is connected to the first main body and surrounds the pressure relief hole, and the protruding portion is extended in a direction away from the battery; The second protection plate includes a second main body and a first connecting portion, the second main body is connected to the first protection plate through the first connecting portion, and the first connecting portion is provided with the avoidance hole; The protrusion is inserted into the avoidance hole so that a side of the protrusion facing away from the battery is higher than a side of the first connection portion facing the battery.

3. The battery module according to claim 1, characterized in that: The second protection plate includes a second main body and a first connecting portion, the second main body is connected to the first protection plate through the first connecting portion, and the first connecting portion is provided with the avoidance hole; The second main body protrudes relative to the first connecting portion in a direction away from the battery, so that the second main body and the first connecting portion define a guide cavity, and a side of the second main body facing away from the battery is higher than a side of the third protective plate facing away from the battery.

4. The battery module according to claim 1, characterized in that: Along the projection direction from the protective assembly to the battery, the projection of the second protective plate on the battery partially overlaps with the projection of the first protective plate on the battery.

5. The battery module according to claim 4, characterized in that: The second protection plate includes a second main body and a first connecting portion, the second main body is connected to the first protection plate through the first connecting portion, and the first connecting portion is provided with the avoidance hole; The projection of the second main body on the battery is at least partially located outside the projection of the first protective plate on the battery, and the battery module also includes a functional device electrically connected to the battery, and the functional device is arranged between the second main body and the battery.

6. The battery module according to claim 5, characterized in that: The battery also includes a battery cell and a pole electrically connected to the battery cell; Wherein, the functional device is configured as a conductive member, and the conductive member is electrically connected to the pole; And / or, the functional device is configured as a circuit board, and the circuit board is electrically connected to the pole.

7. The battery module according to claim 5, characterized in that: The second main body portion protrudes relative to the first connecting portion in a direction away from the battery, so that a mounting cavity is formed between the second main body portion and the battery, and the functional device is disposed in the mounting cavity.

8. The battery module according to claim 1, characterized in that: The third protective plate is provided with a weakened area corresponding to the pressure relief hole.

9. The battery module according to claim 1, characterized in that: A connection area between the first protective plate and the second protective plate is greater than a connection area between the second protective plate and the third protective plate.

10. A vehicle, characterized in that A battery module comprising any one of claims 1 to 9.

Images