Directional exhaust structure, battery and battery pack

Abstract

The utility model discloses a directional exhaust structure, a battery and a battery pack, and belongs to the technical field of battery packs. The directional exhaust structure comprises an exhaust main body, a plugging piece and a compression piece; a first cavity and a second cavity which are communicated with each other are formed in the exhaust main body, the first cavity is communicated with the interior of the battery cell, and the second cavity is located outside the battery cell; the plugging piece is arranged in the second cavity in a sliding manner; the compression piece is limited between the plugging piece and the first inner side wall of the second cavity; the plugging piece can move along a first direction under the action of gas generated in the battery cell until the first cavity is communicated with the second cavity; and the blocking piece is driven to move in the second direction to separate the first cavity from the second cavity under the action of the elastic force of the compression piece or under the action of the gravity of the blocking piece and the compression piece. The directional exhaust structure can separate the first cavity from the second cavity, and can ensure that the directional exhaust structure still has sealing performance after the internal pressure of the battery cell is released, so that the directional exhaust structure can be repeatedly used, and the pressure relief cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a directional exhaust structure, a battery and a battery pack. Background Art

[0002] Soft-pack batteries are enclosed spaces formed by aluminum-plastic film packaging. Gas will be generated during the circulation process of soft-pack batteries, and the generated gas will cause the pressure inside the battery to increase, which may easily cause the battery's cycle performance to fail. Moreover, when the pressure value inside the battery exceeds the preset threshold, it will cause the aluminum-plastic film to burst, posing a major safety hazard.

[0003] At present, a pressure relief valve is usually used to release the pressure of the gas in the battery cell; however, the pressure relief valve usually fails after it is opened once, and the pressure relief cost is high; moreover, the explosion-proof plate of the pressure relief valve cannot be restored after the valve is opened, resulting in the connection between the inside of the battery cell and the external environment, and there is a risk of fire and explosion due to air, moisture and debris in the external environment entering the battery cell.

[0004] In view of the above problems, directional exhaust structures, batteries and battery packs are urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a directional exhaust structure, a battery and a battery pack, which can ensure that the directional exhaust structure is still sealed after the internal pressure of the battery cell is released, so that the directional exhaust structure can be reused.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Directional exhaust structure, including:

[0008] An exhaust body, in which a first cavity and a second cavity are formed in communication, the first cavity is in communication with the interior of the battery cell, and the second cavity is located outside the battery cell;

[0009] A blocking member, slidably disposed in the second cavity;

[0010] A compression member, limitedly located between the blocking member and the first inner wall of the second cavity;

[0011] Wherein, the blocking member can move along the first direction under the action of the gas generated in the battery cell to connect the first cavity with the second cavity; and under the action of the elastic force of the compression member itself or the gravity of the blocking member and the compression member, the blocking member is driven to move along the second direction to separate the first cavity from the second cavity, and the first direction is opposite to the second direction.

[0012] As an optional solution, the directional exhaust structure further includes:

[0013] The mounting member is connected to the first surface of the blocking member, and the compression member is located between the mounting member and the first inner wall of the second cavity.

[0014] As an optional solution, the compression element includes:

[0015] The elastic member has a compression limit located between the mounting member and the first inner wall of the second cavity, and the gas generated in the battery cell can pass through the elastic member, and under the action of the elastic force of the elastic member itself, the blocking member is driven to move along the second direction to separate the first cavity and the second cavity.

[0016] As an optional solution, when the battery cell is placed vertically, the compression member includes:

[0017] A first guide rod, one end of which is connected to the mounting member, and drives the blocking member to move along a second direction to separate the first cavity and the second cavity under the action of the blocking member, the mounting member and the first guide rod's own gravity;

[0018] A second guide rod, one end of which is slidably connected to the other end of the first guide rod in a vertical direction;

[0019] A baffle is connected to the other end of the second guide rod, and the baffle is connected to the first inner wall of the second cavity, and the gas generated in the battery core can pass through the baffle.

[0020] As an optional solution, the directional exhaust structure further includes:

[0021] A sealing component is connected to the second surface of the blocking member facing the first cavity, and is used for sealingly abutting against the second inner wall of the second cavity close to the first cavity to seal and separate the first cavity and the second cavity.

[0022] As an optional solution, the sealing assembly includes:

[0023] A fixing member connected to the second surface of the blocking member so that a clamping groove is formed between the fixing member and the blocking member;

[0024] The sealing member is installed in the clamping groove.

[0025] As an optional solution, the directional exhaust structure further includes:

[0026] The guide member is connected to the first surface of the blocking member, and the compression member is slidably disposed in the guide member.

[0027] As an alternative, a third cavity communicating with the second cavity is further formed in the exhaust body. The third cavity is located outside the battery cell, and the second cavity is located between the first cavity and the second cavity. In the third direction, the size of the second cavity is greater than the size of the first cavity and the size of the third cavity respectively, and the third direction is perpendicular to the first direction and the second direction respectively.

[0028] A battery, comprising a battery cell and the directional exhaust structure as described above.

[0029] A battery pack, comprising a plurality of batteries as described above.

[0030] The beneficial effects of the present utility model are as follows:

[0031] By forming a first cavity and a second cavity communicating with each other in the exhaust body, the first cavity is communicated with the inside of the battery cell, the second cavity is located outside the battery cell, and the plugging member is slidably arranged in the second cavity, and at the same time, the compression member is limited between the plugging member and the first inner wall of the second cavity; when the pressure value inside the battery cell exceeds the preset threshold value, the gas generated inside the battery cell at this time can directly push the plugging member to move along the first direction to communicate the first cavity with the second cavity, so that the gas inside the battery cell is discharged directionally through the first cavity and the second cavity in sequence, and the internal pressure of the battery cell can be quickly released to ensure the normal use performance and safety of the battery cell; when the pressure value discharged to the inside of the battery cell is less than the preset threshold value, at this time, the plugging member can be automatically driven to move along the second direction under the action of the self-elastic force of the compression member or under the action of the self-gravity of the plugging member and the compression member, so as to cut off the first cavity from the second cavity through the plugging member, ensure the sealing performance of the directional exhaust structure after the pressure is released, and prevent safety risks such as fire and explosion caused by air, moisture and sundries in the external environment entering the inside of the battery cell through the first cavity, and can ensure the safety of the battery; and, since the directional exhaust structure still has sealing performance after the pressure is released, the sealing effect on the battery cell can be ensured, so as to facilitate the next exhaust, that is, the directional exhaust structure can be reused, reducing the pressure relief cost of the battery cell. Description of the Drawings

[0032] Figure 1 is a schematic assembly structure diagram between the battery cell and the directional exhaust structure provided by the present utility model;

[0033] Figure 2 is a schematic structural diagram of the directional exhaust structure (the first cavity is communicated with the second cavity) provided in the first embodiment of the present utility model;

[0034] Figure 3 is a schematic structural diagram of the directional exhaust structure (the first cavity is separated from the second cavity) provided in the second embodiment of the present utility model.

[0035] Description of reference numerals:

[0036] 1-Battery cell;

[0037] 2-directional exhaust structure; 21-exhaust body; 211-first cavity; 212-second cavity; 213-third cavity; 214-first connection port; 215-second connection port; 216-first inner wall; 217-second inner wall; 22-blocking member; 221-first surface; 231-elastic member; 232-first guide rod; 233-second guide rod; 234-baffle; 24-mounting member; 25-sealing assembly; 251-fixing member; 2511-first fixing member; 2512-second fixing member; 252-sealing member; 26-guide member. DETAILED DESCRIPTION

[0038] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0039] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0040] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0041] Embodiment 1

[0042] like Figure 1 As shown, in this embodiment, a directional exhaust structure 2 and a battery including the directional exhaust structure 2 are proposed. The battery also includes a battery cell 1. The directional exhaust structure 2 is used to exhaust the gas inside the battery cell 1 in a directional manner so that the gas pressure inside the battery cell 1 is less than a preset threshold, thereby ensuring the normal performance and safety of the battery cell 1, and further ensuring the performance and safety of the entire battery. Among them, the preset threshold needs to be determined according to the specific operating conditions of the battery, and is not specifically limited here. In this embodiment, the battery can specifically be a soft-pack battery.

[0043] Specifically, Figure 1 and Figure 2As shown, the directional exhaust structure 2 includes an exhaust body 21, a plugging member 22 and a compression member; wherein, a first cavity 211 and a second cavity 212 are formed in the exhaust body 21, the first cavity 211 is connected to the inside of the battery cell 1, and the second cavity 212 is located outside the battery cell 1; the plugging member 22 is slidably arranged in the second cavity 212 along the first direction or the second direction; the compression member is limited between the plugging member 22 and the first inner side wall 216 of the second cavity 212; specifically, the plugging member 22 can move along the first direction under the action of the gas generated in the battery cell 1 to make the first cavity 211 and the second cavity 212 connected, so as to discharge the gas in the battery cell 1 in a directional manner; and under the action of the elastic force of the compression member itself or the gravity of the plugging member 22 and the compression member, the plugging member 22 is driven to move along the second direction to separate the first cavity 211 and the second cavity 212, so as to seal the battery cell 1. In this embodiment, the exhaust body 21 can be specifically a copper tube. The first direction is opposite to the second direction. Figure 2 As shown by arrow A in FIG. , the second direction is as follows Figure 2 As shown by arrow B in FIG.

[0044] Compared with the prior art, the directional exhaust structure 2 in this embodiment changes the exhaust method of the gas inside the battery cell 1; by forming a first cavity 211 and a second cavity 212 that are interconnected in the exhaust body 21, the first cavity 211 is connected to the inside of the battery cell 1, the second cavity 212 is located outside the battery cell 1, and the blocking member 22 is slidably set in the second cavity 212, and the compression member is limited between the blocking member 22 and the first inner wall 216 of the second cavity 212; when the pressure value inside the battery cell 1 exceeds the preset threshold value, the gas generated in the battery cell 1 at this time can directly push the blocking member 22 to move along the first direction to connect the first cavity 211 with the second cavity 212, so that the gas in the battery cell 1 is directionally discharged through the first cavity 211 and the second cavity 212 in turn, which can quickly release the internal pressure of the battery cell 1. The normal performance and safety of the battery cell 1 are ensured; when the pressure value discharged into the battery cell 1 is less than the preset threshold value, at this time, the sealing member 22 can be automatically driven to move along the second direction under the action of the elastic force of the compression member itself or under the action of the sealing member 22 and the self-gravity of the compression member, so as to separate the first cavity 211 and the second cavity 212 through the sealing member 22, so as to ensure that the directional exhaust structure 2 is still sealed after the pressure is released, and prevent the safety risks such as fire and explosion caused by the air and moisture in the external environment entering the interior of the battery cell 1 through the first cavity 211, so as to ensure the safety of the battery; and, because the directional exhaust structure 2 is still sealed after the pressure is released, so as to ensure the sealing effect of the battery cell 1, so as to facilitate the next exhaust, that is, the directional exhaust structure 2 can be reused, which reduces the pressure relief cost of the battery cell 1.

[0045] It is worth noting that by allowing the gas in the battery cell 1 to be discharged in a directed manner through the first cavity 211 and the second cavity 212 in sequence, it will not be discharged from other positions to the outside of the battery cell 1, thereby avoiding the gas inside the battery cell 1 from being discharged everywhere and affecting other battery cells 1 or other structures of the battery, which can better protect other battery cells 1 and other structures of the battery and ensure that the safety of the entire battery is higher.

[0046] Furthermore, if Figure 2 As shown, the directional exhaust structure 2 further includes a mounting member 24, which is fixedly connected to the first surface 221 of the blocking member 22, and the compression member is limited between the mounting member 24 and the first inner wall 216 of the second cavity 212. In this embodiment, the mounting member 24 can be a mounting block, and the blocking member 22 can be a blocking block.

[0047] Furthermore, if Figure 2 As shown, the compression member includes an elastic member 231, one end of the elastic member 231 is connected to the mounting member 24, and the other end of the elastic member 231 is connected to the first inner wall 216 of the second cavity 212. Under the action of the elastic force of the elastic member 231 itself, the blocking member 22 can be driven to move along the second direction to separate the first cavity 211 and the second cavity 212.

[0048] Specifically, Figure 2 As shown, the gas generated in the battery cell 1 can be discharged through the elastic member 231, so as to avoid the elastic member 231 blocking the discharge of the gas flowing into the second cavity 212, thereby ensuring that the gas generated in the battery cell 1 is discharged through the first cavity 211 and the second cavity 212 in sequence, ensuring the smoothness and reliability of the exhaust. In this embodiment, the elastic member 231 can be specifically a compression spring.

[0049] By setting the elastic member 231, when the pressure value inside the battery cell 1 is less than the preset threshold value, since the pressure of the gas inside the battery cell 1 cannot overcome the elastic force of the elastic member 231 at this time, the elastic force of the elastic member 231 can push the sealing member 22 and the mounting member 24 to move as a whole along the second direction, so that the sealing member 22 moves to separate the first cavity 211 and the second cavity 212. The operation is simple and convenient, and the sealing effect on the battery cell 1 is better. In addition, the movement of the elastic member 231 can also provide guidance for the movement of the sealing member 22, thereby ensuring the guidance and reliability of the movement of the sealing member 22 in the first direction or the second direction.

[0050] Furthermore, if Figure 2As shown, the elastic member 231 is compressed and limited between the mounting member 24 and the first inner side wall 216 of the second cavity 212. That is, when the plugging member 22 separates the first cavity 211 from the second cavity 212, the elastic member 231 is in a compressed state. At this time, the elastic force of the elastic member 231 can push the plugging member 22 to move closer to the first cavity 211 along the second direction, so as to ensure a better separation effect between the first cavity 211 and the second cavity 212, and further ensure a better sealing effect on the battery cell 1.

[0051] Furthermore, as Figure 2 shown, the directional exhaust structure 2 further includes a sealing assembly 25. The sealing assembly 25 is connected to the second surface of the plugging member 22 facing the first cavity 211. That is, the first surface 221 and the second surface on the plugging member 22 are oppositely arranged; the sealing assembly 25 is used for sealingly abutting against the second inner side wall 217 in the second cavity 212 close to the first cavity 211 to sealingly separate the first cavity 211 from the second cavity 212. Among them, the first inner side wall 216 and the second inner side wall 217 in the second cavity 212 are oppositely arranged.

[0052] By providing the sealing assembly 25 to sealingly separate the first cavity 211 from the second cavity 212, it can ensure a better separation effect between the first cavity 211 and the second cavity 212, so as to ensure a better sealing effect on the battery cell 1, and further better prevent safety risks such as fire and explosion caused by air, moisture, etc. in the external environment entering the interior of the battery cell 1 through the first cavity 211.

[0053] Specifically, as Figure 2 shown, the sealing assembly 25 includes a fixing member 251 and a sealing member 252; among them, the fixing member 251 is fixedly connected to the second surface of the plugging member 22, so as to form a clamping groove between the fixing member 251 and the plugging member 22, and the sealing member 252 is installed in the clamping groove to realize the installation of the sealing member 252 between the fixing member 251 and the plugging member 22. Among them, the fixing member 251 extends towards the inside of the first cavity 211 to avoid interference between the fixing member 251 and the second inner side wall 217 in the second cavity 212 during the movement of the plugging member 22.

[0054] Furthermore, the sealing member 252 can specifically be a sealing ring capable of elastic deformation, so as to ensure a tighter abutment between the sealing ring and the second inner side wall 217 through the elastic deformation of the sealing ring, thereby ensuring a better sealing effect on the battery cell 1. In other embodiments, the sealing member 252 can specifically be a sealing gasket.

[0055] Specifically, as Figure 2As shown, the fixing member 251 includes a first fixing member 2511 and a second fixing member 2512. A through hole is provided on the sealing member 252. One end of the first fixing member 2511 is fixedly connected to the second surface of the plugging member 22. The middle part of the second fixing member 2512 is vertically connected to the other end of the first fixing member 2511 to form a fixing member 251 with a T-shaped structure. At the same time, a placement groove is formed on one side of the plugging member 22 facing the second surface. The sealing member 252 is sleeved on the first fixing member 2511 through the through hole thereon and placed in the placement groove, and one side of the sealing member 252 abuts against the second surface, and the second fixing member 2512 abuts against the other side of the sealing member 252. That is, the placement groove, the first fixing member 2511, and the second fixing member 2512 form the above-mentioned clamping groove with each other. In this embodiment, the first fixing member 2511 and the second fixing member 2512 are integrally formed structures, and the first fixing member 2511 and the second fixing member 2512 can specifically be fixing blocks.

[0056] By setting the fixing member 251 with the above structure to fix the sealing member 252, the fixing method is simple and convenient, and the cost of the fixing member 251 is relatively low, so that the pressure relief cost can be lower, and at the same time, the fixing effect on the sealing member 252 can be ensured to be better.

[0057] It should be noted that, as Figure 2 shown, in the third direction, the size of the second fixing member 2512 is smaller than the size of the first cavity 211, so as to avoid interference between the second fixing member 2512 and the second inner side wall 217 in the second cavity 212 during the movement of the plugging member 22. Among them, the third direction is perpendicular to the first direction and the second direction respectively, and the third direction is specifically as Figure 2 shown by the arrow C in

[0058] Specifically, as Figure 2 shown, the directional exhaust structure 2 further includes a guiding member 26. The guiding member 26 is connected to the first surface 221 of the plugging member 22. The compression member is slidably arranged in the guiding member 26, and the mounting member 24 is located in the guiding member 26. In this embodiment, the guiding member 26 can specifically be a hollow annular structure.

[0059] By setting the guiding member 26, it can provide a guiding function for the movement of the compression member, avoid the problem of deflection of the compression member during the movement process, so as to ensure the guiding property and reliability of the movement of the compression member, and further ensure the accuracy and reliability of the abutment between the sealing member 252 and the second inner side wall 217.

[0060] It should be noted that, as Figure 2As shown, there is a gap between the outer periphery of the guiding member 26 and the inner peripheral wall of the second cavity 212, so that the gas entering the second cavity 212 can be discharged through this gap, avoiding interference of the guiding member 26 with the discharge of the gas in the second cavity 212.

[0061] Furthermore, as Figure 2 shown, a third cavity 213 communicating with the second cavity 212 is further formed in the exhaust body 21. The third cavity 213 is located outside the battery cell 1, and the second cavity 212 is located between the first cavity 211 and the second cavity 212, so that the gas generated in the battery cell 1 is discharged through the first cavity 211, the second cavity 212 and the third cavity 213 in sequence.

[0062] By providing the third cavity 213, the guiding and draining effect can be further provided for the gas generated in the battery cell 1, ensuring better directivity of gas discharge.

[0063] Specifically, as Figure 2 shown, in the third direction, the size of the second cavity 212 is larger than the size of the first cavity 211 and the size of the third cavity 213 respectively. On the one hand, it is convenient to arrange the plugging member 22, the sealing assembly 25, the mounting member 24 and the compression member in the second cavity 212; on the other hand, it is relatively easy to plug the smaller-sized first cavity 211, making the operation of sealing the battery cell 1 relatively easy and convenient. Among them, in the third direction, the size of the first cavity 211 and the size of the third cavity 213 may be equal or not equal, and no specific limitation is made here.

[0064] Furthermore, as Figure 2 shown, a first connection port 214 is formed at the connection position between the first cavity 211 and the second cavity 212. The plugging member 22 can open or close the first connection port 214, and a second connection port 215 is formed at the connection position between the second cavity 212 and the third cavity 213. Among them, in the third direction, the size of the sealing member 252 is larger than the size of the first connection port 214 to ensure that the sealing member 252 can completely seal the first connection port 214, realizing the isolation between the first cavity 211 and the second cavity 212, and preventing sundries and gas in the external environment from entering the interior of the battery cell 1 through the first connection port 214 and causing a short circuit.

[0065] Specifically, the discharge path of the gas generated in the battery cell 1 is specifically: passing through the first cavity 211, the first connection port 214, the second cavity 212, the second connection port 215, and the third cavity 213 in sequence, and then being discharged to the outside of the battery cell 1 through the third cavity 213.

[0066] It should be noted that the battery in this embodiment is formed in a vacuum environment. Therefore, the pressure inside the battery cell 1 is less than the pressure outside the battery cell 1. Thus, before the battery cell 1 generates gas, the seal 252 can tightly abut against the second inner wall 217 under the action of the pressure difference, thereby ensuring a better sealing effect for the battery cell 1.

[0067] The specific working process of the directional exhaust structure 2 in this embodiment is as follows:

[0068] When the pressure value inside the battery cell 1 exceeds the preset threshold:

[0069] Since the pressure inside the battery cell 1 can overcome the elastic force of the elastic member 231 at this time, the gas generated inside the battery cell 1 directly pushes the seal 252 and the plugging member 22 as a whole to move along the first direction, so as to connect the first cavity 211 with the second cavity 212, so that the gas sequentially passes through the first cavity 211, the first connection port 214, the second cavity 212, the second connection port 215, and the third cavity 213 and is discharged; meanwhile, the elastic member 231 is compressed.

[0070] When the exhaust reaches that the pressure value inside the battery cell 1 is less than the preset threshold:

[0071] Since the pressure of the gas inside the battery cell 1 cannot overcome the elastic force of the elastic member 231 at this time, therefore, the elastic force of the elastic member 231 can act to push the seal 252 to automatically reset along the second direction until the seal 252 moves to re-separate the first cavity 211 from the second cavity 212. At this time, the seal 252 abuts tightly against the second inner wall 217.

[0072] The directional exhaust structure 2 in this embodiment can ensure that the seal 252 tightly abuts against the second inner wall 217 through the compression of the elastic member 231, ensuring a better sealing effect for the battery cell 1; meanwhile, by making the size of the seal 252 larger than the size of the first connection port 214 in the third direction, it is ensured that the seal 252 can completely cover the first connection port 214, thereby ensuring a better sealing effect for the battery cell 1; and, by making the seal 252 an elastic deformable sealing ring, it can ensure a closer abutment between the sealing ring and the second inner wall 217, further ensuring a better sealing effect for the battery cell 1; moreover, by providing the first cavity 211, the second cavity 212 and the third cavity 213, it can provide a guiding drainage for the gas inside the battery cell 1, ensuring that the gas inside the battery cell 1 can be discharged directionally.

[0073] Embodiment Two

[0074] As Figure 3As shown, in this embodiment, a directional exhaust structure 2 is proposed. The directional exhaust structure 2 is basically the same as the structure in the first embodiment, except that the structure of the compression member in this embodiment is different from that of the compression member in the first embodiment.

[0075] Specifically, as Figure 3 shown, when the battery cell 1 is placed vertically, the compression member includes a first guide rod 232, a second guide rod 233, and a baffle 234; wherein, one end of the first guide rod 232 is connected to the mounting member 24, and one end of the second guide rod 233 is slidably connected vertically to the other end of the first guide rod 232; the baffle 234 is connected to the other end of the second guide rod 233, and the baffle 234 is connected to the first inner side wall 216 of the second cavity 212. The gas generated in the battery cell 1 can pass through the baffle 234 and enter the third cavity 213 through the second connection port 215, so as to facilitate the discharge of the gas from the third cavity 213 and ensure the smoothness and reliability of the exhaust. Among them, the vertical direction is specifically as Figure 3 shown by the arrow D in.

[0076] The specific working process of the directional exhaust structure 2 in this embodiment is as follows:

[0077] When the pressure value inside the battery cell 1 exceeds the preset threshold:

[0078] Since the pressure inside the battery cell 1 can overcome the self-gravity of the plugging member 22, the mounting member 24, the sealing assembly 25, and the first guide rod 232, as well as the connection force between the first guide rod 232 and the second guide rod 233 at this time, the gas generated inside the battery cell 1 directly pushes the sealing member 252 and the plugging member 22 as a whole to move along the first direction, so as to connect the first cavity 211 and the second cavity 212, so that the gas sequentially passes through the first cavity 211, the first connection port 214, the second cavity 212, the second connection port 215, and the third cavity 213 and is discharged.

[0079] At the same time, the first guide rod 232 slides vertically outside the second guide rod 233 to provide a guiding effect for the vertical movement of the sealing member 252 and the plugging member 22, and ensure the guiding property and reliability of the movement of the sealing member 252 and the plugging member 22.

[0080] When the pressure value inside the battery cell 1 is less than the preset threshold during exhaust:

[0081] Since the pressure of the gas inside the battery cell 1 at this time cannot overcome the self - gravity of the plugging member 22, the mounting member 24, the sealing assembly 25 and the first guide rod 232, as well as the connection force between the first guide rod 232 and the second guide rod 233, therefore, due to the self - gravity of the plugging member 22, the mounting member 24, the sealing assembly 25 and the first guide rod 232, the plugging member 22 and the sealing member 252 as a whole can automatically reset in the vertical direction until the sealing member 252 moves to re - separate the first cavity 211 from the second cavity 212.

[0082] Meanwhile, the first guide rod 232 slides reversely along the first direction outside the second guide rod 233 to provide a guiding effect for the movement of the sealing member 252 and the plugging member 22 in the vertical direction, ensuring the guiding property and reliability of the movement of the sealing member 252 and the plugging member 22.

[0083] Embodiment Three

[0084] In this embodiment, a battery pack is proposed, which includes a plurality of batteries as in Embodiment One or Embodiment Two.

[0085] The above content is only the preferred embodiment of the present utility model. For those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. Directional exhaust structure, characterized in that, include: An exhaust body (21) having a first cavity (211) and a second cavity (212) formed therein, the first cavity (211) being in communication with the interior of the battery cell (1), and the second cavity (212) being located outside the battery cell (1); A blocking member (22) slidably disposed in the second cavity (212); A compression member, located between the blocking member (22) and a first inner wall (216) of the second cavity (212); Wherein, the blocking member (22) can move along a first direction under the action of gas generated in the battery cell (1) to connect the first cavity (211) with the second cavity (212); and under the action of the elastic force of the compression member itself or under the action of the blocking member (22) and the gravity of the compression member itself, the blocking member (22) is driven to move along a second direction to separate the first cavity (211) from the second cavity (212), and the first direction is opposite to the second direction.

2. The directional exhaust structure according to claim 1, wherein The directional exhaust structure also includes: The mounting member (24) is connected to the first surface (221) of the blocking member (22), and the compression member is located between the mounting member (24) and the first inner wall (216) of the second cavity (212).

3. The directional exhaust structure according to claim 2, wherein, The compression element comprises: The elastic member (231) has a compression limit located between the mounting member (24) and the first inner wall (216) of the second cavity (212), and the gas generated in the battery cell (1) can pass through the elastic member (231). Under the action of the elastic force of the elastic member (231), the blocking member (22) is driven to move along the second direction to separate the first cavity (211) and the second cavity (212).

4. The directional exhaust structure according to claim 2, wherein When the battery cell (1) is placed vertically, the compression member comprises: A first guide rod (232), one end of which is connected to the mounting member (24), and drives the blocking member (22) to move along a second direction to separate the first cavity (211) and the second cavity (212) under the action of the self-weight of the blocking member (22), the mounting member (24) and the first guide rod (232); A second guide rod (233), one end of the second guide rod (233) being slidably connected to the other end of the first guide rod (232) in a vertical direction; A baffle (234) is connected to the other end of the second guide rod (233), and the baffle (234) is connected to the first inner wall (216) of the second cavity (212), and the gas generated in the battery cell (1) can pass through the baffle (234).

5. The directional exhaust structure according to any one of claims 1-4, characterized in that, The directional exhaust structure also includes: A sealing component (25) is connected to a second surface of the sealing member (22) facing the first cavity (211), and the sealing component (25) is used to seal against a second inner wall (217) in the second cavity (212) close to the first cavity (211) to seal and separate the first cavity (211) and the second cavity (212).

6. The directional exhaust structure according to claim 5, wherein, The sealing assembly (25) comprises: A fixing member (251) is connected to the second surface of the plugging member (22) to form a clamping groove between the fixing member (251) and the plugging member (22). A sealing member (252) is installed in the clamping groove.

7. The directional exhaust structure according to any one of claims 1-4, characterized in that, The directional exhaust structure further includes: A guiding member (26) is connected to the first surface (221) of the plugging member (22), and the compression member is slidably disposed in the guiding member (26).

8. The directional exhaust structure according to any one of claims 1-4, characterized in that A third cavity (213) communicating with the second cavity (212) is further formed in the exhaust main body (21). The third cavity (213) is located outside the battery cell (1). The second cavity (212) is located between the first cavity (211) and the second cavity (212). In the third direction, the size of the second cavity (212) is respectively larger than the size of the first cavity (211) and the size of the third cavity (213). The third direction is respectively perpendicular to the first direction and the second direction.

9. A battery, characterized in that, It includes a battery cell (1) and the directional exhaust structure according to any one of claims 1-8.

10. Battery pack, characterized in that, It includes a plurality of batteries according to claim 9.

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