Battery

Abstract

This utility model relates to the field of energy storage technology, and particularly to a battery. The battery includes a casing, a top cover, a cell assembly, and an insulating support. The casing has a first cavity, and the top cover is disposed on the top of the casing and closes the first cavity. The top cover is provided with a pressure relief valve. The cell assembly is disposed in the first cavity, and two sides of the cell assembly in a first direction correspond one-to-one with two side walls of the casing in the first direction to form two exhaust channels. Both exhaust channels extend from the bottom surface of the cell assembly to the top surface of the cell assembly. The insulating support is connected to the top cover and is located between the top cover and the cell assembly in a second direction. The insulating support has first exhaust holes on both sides in the first direction. One end of each of the two first exhaust holes is connected to one of the two exhaust channels, and the other end of each of the two first exhaust holes can be connected to the pressure relief valve. The second direction is perpendicular to the first direction.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a battery. Background Technology

[0002] A battery is a device or system that stores electrical energy in the form of chemical energy and releases it back as electrical energy when needed. Batteries are a key component of modern energy systems, especially in the transition to renewable energy, and are one of the core infrastructures for building flexible, stable, clean, and efficient modern energy systems, playing an indispensable role in optimizing energy utilization. A battery consists of cells, a casing, and a top cover, with the cells located within the space enclosed by the casing and top cover. When a battery experiences thermal failure, the cells produce gas. If this gas cannot be released in time, the battery may pose an explosion risk. Therefore, a pressure relief valve is usually installed on the top cover to release the gas generated during thermal failure. However, gas generated at the bottom of the cells cannot be released smoothly from the pressure relief valve in a timely manner, which can cause a sharp increase in internal pressure, potentially leading to damage to the bottom of the battery or even an explosion. Utility Model Content

[0003] This invention provides a battery that allows the gas generated at the bottom of the battery cell during thermal failure to be discharged through a pressure relief valve.

[0004] This utility model provides a battery, comprising: A housing having a first cavity; A top cover, which is disposed on the top of the housing and closes the first cavity, and the top cover is provided with a pressure relief valve; A battery cell assembly, wherein the battery cell assembly is disposed within the first cavity, and two sides of the battery cell assembly in a first direction respectively correspond one-to-one with two side walls of the housing in the first direction to form two exhaust channels, both of which extend from the bottom surface of the battery cell assembly to the top surface of the battery cell assembly; and An insulating support member is connected to the top cover and located in a second direction between the top cover and the battery cell assembly. The insulating support member has a first vent hole on both sides in the first direction. One end of each of the two first vent holes is connected to one of the two vent channels, and the other end of each of the two first vent holes is connected to the pressure relief valve. The second direction is perpendicular to the first direction.

[0005] In some embodiments, the cell assembly includes two cells arranged side-by-side in a third direction. The two sides of the two cells in the first direction are combined to form the two sides of the cell assembly in the first direction. The two sides of the cells in the first direction are both arc surfaces. The side of the cells abuts against the side wall of the housing. The side of the two cells on the same side and the side wall of the housing together form the exhaust channel. The third direction is perpendicular to the first direction and perpendicular to the second direction. In some embodiments, the exhaust passage extends along the second direction, the exhaust passage is located at the middle position of the sidewall in the third direction, and the first exhaust hole is located at the middle position of the insulating support in the third direction.

[0006] In some embodiments, the insulating support includes: The first boss has two first sidewalls facing away from each other in the first direction, and each of the two first sidewalls is provided with a vent that can connect to the pressure relief valve. Two second protrusions are respectively spaced apart on both sides of the first protrusion in the first direction; two first exhaust holes are respectively disposed on the two second protrusions; and the two first exhaust holes are respectively connected to the two vents. Two plates, one of which is connected between the first boss and one of the second bosses, and the other plate is connected between the first boss and the other of the second bosses.

[0007] In some embodiments, both second bosses have second sidewalls, and the two second sidewalls are respectively disposed opposite to the two first sidewalls, with one end of the first vent hole penetrating through the second sidewall; The plate is connected between the first sidewall and the second sidewall. The position of the plate connected to the first sidewall is located between the top cover and the vent in the second direction. The position of the plate connected to the second sidewall is located between the top cover and the first exhaust hole in the second direction.

[0008] In some embodiments, the second boss further has a third sidewall, wherein one end of the first vent hole passes through the third sidewall and communicates with the vent passage in the direction opposite to the first sidewall.

[0009] In some embodiments, the second boss further has a bottom wall connected between the second sidewall and the third sidewall and facing the cell assembly, and one end of the first vent hole penetrates the bottom wall of the second boss and communicates with the vent channel.

[0010] In some embodiments, the end of the first exhaust port that penetrates the second sidewall is positioned directly opposite the vent in the first direction.

[0011] In some embodiments, the two first sidewalls form a second cavity, both of the vents are connected to the second cavity, and the second cavity extends through the surface of the first boss toward the top cover to be able to communicate with the pressure relief valve.

[0012] In some embodiments, the first boss has a bottom wall connected between the two first sidewalls and facing the battery cell assembly, and the bottom wall of the first boss is provided with a through second vent hole, which communicates with the second cavity.

[0013] This application provides a battery that, compared with the prior art, has at least the following advantages: Two exhaust channels are formed by correspondingly venting the sides of the battery cell assembly to the side walls of the casing. This allows the gas generated at the bottom of the battery cell assembly to flow through the exhaust channels to the top of the battery cell assembly, then through the first exhaust hole to the pressure relief valve, and finally out through the pressure relief valve. This prevents gas from accumulating inside the battery and causing a sharp increase in internal pressure, thus avoiding bottom damage or even explosion of the battery. Attached Figure Description

[0014] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the battery structure provided in the embodiments of this application; Figure 2 This is an exploded view of the battery provided in an embodiment of this application; Figure 3 This is a schematic diagram of the shell structure provided in the embodiments of this application; Figure 4 This is a top view of the housing and battery cell assembly in the assembled state provided in the embodiments of this application; Figure 5 This is a schematic diagram of the insulating support member provided in the embodiments of this application from a first-view perspective; Figure 6 This is a schematic diagram of the insulating support member provided in the embodiment of this application from a second perspective; Figure 7 This is a structural schematic diagram of the insulating support member provided in the embodiments of this application from a third-person perspective.

[0016] Figure label: 1-Battery; 11-Shell; 111-First cavity; 12-Top cover; 121-Pressure relief valve; 13-Cell pack; 131-Cell; 14-Insulating support; 141-First boss; 1411-First sidewall; 1412-Vent; 1413-Second cavity; 1414-Second exhaust hole; 142-Second boss; 1421-First exhaust hole; 1422-Second sidewall; 1423-Third sidewall; 143-Plate; 2-Exhaust passage. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In this application, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0020] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0021] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application provides a battery 1, including a housing 11, a top cover 12, a battery cell assembly 131, and an insulating support 14. The housing 11 has a first cavity 111, and the top cover 12 is disposed on the top of the housing 11 and closes the first cavity 111. The top cover 12 is provided with a pressure relief valve 121. The battery cell assembly 131 is disposed within the first cavity 111, and the battery cell assembly 131 is positioned in a first direction (e.g., ...). Figure 1The two sides of the casing 11 (as shown in the X direction) correspond one-to-one with the two side walls in the first direction to form two exhaust channels 2. Both exhaust channels 2 extend from the bottom surface of the battery cell group 131 to the top surface of the battery cell group 131. The insulating support 14 is connected to the top cover 12 and in the second direction (as shown in the X direction) Figure 1 Located between the top cover 12 and the battery cell 131 group 13 (in the Z direction), the insulating support member 14 is provided with first exhaust holes 1421 on both sides in the first direction. One end of the two first exhaust holes 1421 is connected to the two exhaust channels 2 respectively, and the other end of the two first exhaust holes 1421 can be connected to the pressure relief valve 121. The second direction is perpendicular to the first direction.

[0022] The battery 1 provided in this application embodiment can be in the shape of a cuboid when in the assembled state. Of course, the battery 1 can also be other shapes, which are not limited here. For ease of description, this application embodiment uses the shape of the battery 1 as a cuboid as an example. Based on this, the first direction in this application can be the width direction of the battery 1, the second direction can be the height direction of the battery 1, and the third direction mentioned below can be the thickness direction of the battery 1.

[0023] Among them, the sides of the battery cell 131 in the thickness direction (i.e., the third direction below) are roughly in contact with the sidewalls of the housing 11 in the thickness direction, and the side of the battery cell 131 group 13 in the first direction is surrounded by the sidewall of the housing 11 on the same side to form a gap, which is the exhaust channel 2.

[0024] The insulating support member 14 abuts against the top cover 12 and the battery cell 131 assembly 13 on both sides in the second direction, respectively. It should be noted that in this application, the two edges of the insulating support member 14 in the third direction are approximately in contact with the inner wall of the housing 11. A portion of the insulating support member 14 on both sides in the first direction is located in the exhaust channels 2 on both sides. Based on this, the insulating support member 14 is provided with a first exhaust hole 1421 on both sides in the first direction. One end of the first exhaust hole 1421 is opened in the part of the insulating support member 14 located in the exhaust channel 2 to communicate with the exhaust channel 2, so as to prevent the first exhaust hole 1421 from being separated from the exhaust channel 2. The other end of the first exhaust hole 1421 can communicate with the pressure relief valve 121.

[0025] In this embodiment, when the battery cell group 131 experiences thermal failure, the gas generated at the bottom of the battery cell group 131 flows into the exhaust channels 2 on both sides and rises along the exhaust channels 2 to the top of the battery cell group 131. Then, it flows through the first exhaust hole 1421 to the position of the pressure relief valve 121 and finally flows out from the pressure relief valve 121.

[0026] In this embodiment, two exhaust channels 2 are formed by correspondingly matching the side surfaces of the battery cell group 131 and the side walls of the casing 11. This allows the gas generated at the bottom of the battery cell group 131 to flow through the exhaust channels 2 to the top of the battery cell group 131, then through the first exhaust port 1421 to the pressure relief valve 121 and finally discharged by the pressure relief valve 121. This prevents gas from accumulating inside the battery 1 and causing a sharp increase in the internal pressure of the battery 1, thus avoiding bottom damage or even explosion of the battery 1.

[0027] Please participate as well. Figure 1 and Figure 2 In some embodiments, the battery cell group 131 includes two cells in a third-party orientation (e.g., ...). Figure 1 The battery cells 131 are arranged side by side in the first direction (as shown in the Y direction). The two sides of the two battery cells 131 in the first direction are combined to form the two sides of the battery cell group 13 in the first direction. The two sides of the battery cell 131 in the first direction are both arc surfaces. The side of the battery cell 131 abuts against the side wall of the housing 11. The side of the two battery cells 131 on the same side and the side wall of the housing 11 together form the exhaust channel 2. The third direction is perpendicular to the first direction and perpendicular to the second direction. In this embodiment, the battery cell group 131 includes two battery cells 131. Of course, the battery cell group 131 in this application may also include other numbers of battery cells 131, which are not limited here.

[0028] Among them, the two sides of the battery cell 131 in the first direction are arc-shaped. The side of the battery cell 131 abuts against the side wall of the housing 11 and forms a line contact. Therefore, the side of the battery cell 131 in the first direction is divided into two parts by the "line" of the line contact. One part is close to the other battery cell 131, and the other part is far away from the other battery cell 131. The parts of the two battery cells 131 that are close to each other and the side wall form an exhaust channel 2.

[0029] In some embodiments, the exhaust passage 2 extends along a second direction and is located in the middle of the sidewall in the third direction, and the first exhaust port 1421 is located in the middle of the insulating support 14 in the third direction.

[0030] In this embodiment, the exhaust channel 2 extends in the second direction, which can minimize the distance of the exhaust channel 2, allowing the gas generated at the bottom of the battery cell 131 to flow to the top of the battery cell 131 as quickly as possible within the exhaust channel 2. In addition, the exhaust channel 2 is located in the middle of the side wall in the third direction, which allows the gas generated on both sides of the battery cell 131 group 13 in the third direction to reach the exhaust channel 2 at approximately the same time.

[0031] Since the exhaust channel 2 is located in the middle of the side wall in the third direction, in order to match the position of the exhaust channel 2, the first exhaust hole 1421 is also located in the middle of the insulating support 14 in the third direction, so that the first exhaust hole 1421 can communicate with the exhaust channel 2.

[0032] Please refer to the following: Figure 5 , Figure 6 and Figure 7 In some embodiments, the insulating support 14 includes a first boss 141, two second bosses 142, and two plates 143. The first boss 141 has two first sidewalls 1411 facing away from each other in a first direction, and each of the two first sidewalls 1411 is provided with a vent 1412 that can connect to the pressure relief valve 121. The two second bosses 142 are respectively spaced apart on both sides of the first boss 141 in the first direction, and two first vent holes 1421 are respectively provided on the two second bosses 142, and the two first vent holes 1421 are respectively connected to the two vent holes 1412. One plate 143 is connected between the first boss 141 and one of the second bosses 142, and the other plate 143 is connected between the first boss 141 and the other second boss 142.

[0033] Among them, the two first sidewalls 1411 of the first boss 141 face the two second bosses 142 respectively, and each of the two first sidewalls 1411 is provided with a vent 1412, so the two vents 1412 also face the two second bosses 142 respectively.

[0034] In this embodiment, when the battery cell group 131 fails thermally, the gas generated at the bottom of the battery cell group 131 enters the exhaust channels 2 on both sides of the battery cell group 131 and flows from the bottom of the battery cell group 131 to the top of the battery cell group 131 along the exhaust channels 2. Then it flows through the two first exhaust holes 1421 to the two vents 1412 respectively, and then flows through the two vents 1412 to the pressure relief valve 121, and finally flows out through the pressure relief valve 121.

[0035] Please continue reading. Figure 5 , Figure 6 and Figure 7 In some embodiments, both second protrusions 142 have second sidewalls 1422, which are respectively disposed opposite to the two first sidewalls 1411. One end of the first vent 1421 passes through the second sidewall 1422. The plate 143 is connected between the first sidewall 1411 and the second sidewall 1422. The plate 143 is connected to the first sidewall 1411 in the second direction between the top cover 12 and the vent 1412, and the plate 143 is connected to the second sidewall 1422 in the second direction between the top cover 12 and the first vent 1421.

[0036] The second sidewall 1422 is respectively positioned opposite to the two first sidewalls 1411, and one end of the first exhaust hole 1421 penetrates through the second sidewall 1422. Therefore, the end of the first exhaust hole 1421 that penetrates through the second sidewall 1422 faces the corresponding first sidewall 1411, thereby reducing the distance that the gas needs to travel from the first exhaust hole 1421 to the vent 1412.

[0037] Furthermore, the plate 143 is connected to the first side wall 1411 in the second direction between the top cover 12 and the vent 1412, and the plate 143 is connected to the second side wall 1422 in the second direction between the top cover 12 and the first exhaust hole 1421. That is to say, the end of the first exhaust hole 1421 that penetrates the second side wall 1422 and the corresponding vent 1412 are both located on the side of the plate 143 away from the top cover 12. The plate 143 creates space for gas to flow from the first exhaust hole 1421 to the vent 1412 and will not obstruct the flow of gas from the first exhaust hole 1421 to the vent 1412.

[0038] Please continue reading. Figure 5 , Figure 6 and Figure 7 In some embodiments, the second boss 142 also has a third sidewall 1423, which is located in the direction opposite to the first sidewall 1411 of the second sidewall 1422. One end of the first exhaust hole 1421 passes through the third sidewall 1423 and communicates with the exhaust channel 2.

[0039] It should be noted that the third sidewall 1423 forms a gap with the corresponding sidewall of the housing 11 in the first direction, so as to prevent the end of the first exhaust hole 1421 penetrating the third sidewall 1423 from being blocked by the sidewall of the housing 11, so that the end of the first exhaust hole 1421 penetrating the third sidewall 1423 can communicate with the exhaust channel 2.

[0040] In this embodiment, when the battery cell group 131 fails thermally, the gas generated at the bottom of the battery cell group 131 enters the exhaust channels 2 on both sides of the battery cell group 131 and flows from the bottom of the battery cell group 131 to the top of the battery cell group 131 along the exhaust channels 2. Then, it flows into the first exhaust hole 1421 through one end of the third side wall 1423, then through the first exhaust hole 1421 through one end of the second side wall 1422 to the vent 1412, then through the vent 1412 to the pressure relief valve 121, and finally flows out through the pressure relief valve 121.

[0041] In some embodiments, the second boss 142 also has a bottom wall connected between the second side wall 1422 and the third side wall 1423 and facing the battery cell 131 group 13, and one end of the first vent hole 1421 passes through the bottom wall of the second boss 142 and communicates with the vent channel 2.

[0042] One portion of the bottom wall of the second protrusion 142 abuts against the top surface of the battery cell group 131, while the other portion is located in the exhaust channel 2. Therefore, to prevent the end of the first exhaust hole 1421 penetrating the bottom wall from being blocked by the top surface of the battery cell group 131, the end of the first exhaust hole 1421 penetrating the bottom wall is opened in the part of the bottom wall of the second protrusion 142 located in the exhaust channel 2, so that the end of the first exhaust hole 1421 penetrating the bottom wall of the second protrusion 142 can communicate with the exhaust channel 2.

[0043] In this embodiment, when the battery cell group 131 fails thermally, the gas generated at the bottom of the battery cell group 131 enters the exhaust channels 2 on both sides of the battery cell group 131 and flows from the bottom of the battery cell group 131 to the top of the battery cell group 131 along the exhaust channels 2. Then, it flows into the first exhaust hole 1421 through one end of the bottom wall of the second protrusion 142, then through one end of the first exhaust hole 1421 through the second side wall 1422 to the vent 1412, then through the vent 1412 to the pressure relief valve 121, and finally flows out through the pressure relief valve 121.

[0044] In some embodiments, the first vent 1421 is positioned directly opposite the vent 1412 in a first direction, with one end of the first vent 1422 penetrating through the second sidewall 1422.

[0045] In this embodiment, the end of the first exhaust hole 1421 that penetrates the second sidewall 1422 faces the first sidewall 1411, and the vent faces the second sidewall 1422. The end of the first exhaust hole 1421 that penetrates the second sidewall 1422 is directly opposite the vent 1412 in the first direction, which can minimize the distance that the gas travels from the end of the first exhaust hole 1421 that penetrates the second sidewall 1422 to the vent 1412, and shorten the time for gas to be discharged.

[0046] Please refer to the following: Figure 2 and Figure 5 In some embodiments, two first sidewalls 1411 form a second cavity 1413, and two vents 1412 are connected to the second cavity 1413. The second cavity 1413 penetrates the surface of the first boss 141 toward the top cover 12 so as to be able to communicate with the pressure relief valve 121.

[0047] It should be noted that the two first sidewalls 1411 forming the second cavity 1413 means that the two first sidewalls 1411 participate in forming the second cavity 1413. In fact, the second cavity 1413 is jointly formed by the two first sidewalls 1411 and the sidewalls on both sides of the first protrusion 141 in the third direction.

[0048] The first boss 141 is directly opposite the pressure relief valve 121 in the first direction, so that the second cavity 1413 and the pressure relief valve 121 are directly opposite in the first direction, which can shorten the distance that the gas flows from the second cavity 1413 to the pressure relief valve 121 and shorten the time for gas to be discharged.

[0049] In this embodiment, when the battery cell group 131 fails thermally, the gas generated at the bottom of the battery cell group 131 enters the exhaust channels 2 on both sides of the battery cell group 131 and flows from the bottom of the battery cell group 131 to the top of the battery cell group 131 along the exhaust channels 2. Then it flows through the two first exhaust holes 1421 to the two vents 1412 respectively. Then it flows through the two vents 1412 into the second cavity 1413, and then from the second cavity 1413 to the pressure relief valve 121, and finally flows out from the pressure relief valve 121.

[0050] Please refer to it again. Figure 5 , Figure 6 and Figure 7 In some embodiments, the first boss 141 has a bottom wall connected between two first sidewalls 1411 and facing the battery cell 131 group 13. The bottom wall of the first boss 141 is provided with a through second vent hole 1414, which communicates with the second cavity 1413.

[0051] The bottom wall of the first protrusion 141 abuts against the top surface of the battery cell 131 group 13. A second exhaust hole 1414 is opened on the bottom wall of the first protrusion 141 to connect with the second cavity 1413, so that some of the gas generated at the top of the battery cell 131 group 13 can flow directly into the second cavity 1413 through the second exhaust hole 1414, then flow from the second cavity 1413 to the pressure relief valve 121, and finally flow out through the pressure relief valve 121.

[0052] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: A housing having a first cavity; A top cover, which is disposed on the top of the housing and closes the first cavity, and the top cover is provided with a pressure relief valve; The battery cell assembly is disposed in the first cavity, and the two sides of the battery cell assembly in the first direction correspond one-to-one with the two side walls of the housing in the first direction to form two exhaust channels. Both exhaust channels extend from the bottom surface of the battery cell assembly to the top surface of the battery cell assembly. as well as An insulating support member is connected to the top cover and located in a second direction between the top cover and the battery cell assembly. The insulating support member has a first vent hole on both sides in the first direction. One end of each of the two first vent holes is connected to one of the two vent channels, and the other end of each of the two first vent holes is connected to the pressure relief valve. The second direction is perpendicular to the first direction.

2. The battery according to claim 1, characterized in that, The battery cell assembly includes two battery cells arranged side by side in a third direction. The two sides of the two battery cells in the first direction are combined to form the two sides of the battery cell assembly in the first direction. The two sides of the battery cells in the first direction are both arc surfaces. The side of the battery cell abuts against the side wall of the housing. The side of the two battery cells on the same side and the side wall of the housing together form the exhaust channel. The third direction is perpendicular to the first direction and perpendicular to the second direction.

3. The battery according to claim 2, characterized in that, The exhaust channel extends along the second direction and is located at the middle position of the side wall in the third direction. The first exhaust hole is located at the middle position of the insulating support in the third direction.

4. The battery according to any one of claims 1-3, characterized in that, The insulating support includes: The first boss has two first sidewalls facing away from each other in the first direction, and each of the two first sidewalls is provided with a vent that can connect to the pressure relief valve. Two second protrusions are respectively spaced apart on both sides of the first protrusion in the first direction; two first exhaust holes are respectively disposed on the two second protrusions; and the two first exhaust holes are respectively connected to the two vents. Two plates, one of which is connected between the first boss and one of the second bosses, and the other plate is connected between the first boss and the other of the second bosses.

5. The battery according to claim 4, characterized in that, Both second protrusions have second sidewalls, and the two second sidewalls are respectively disposed opposite to the two first sidewalls. One end of the first vent hole passes through the second sidewall. The plate is connected between the first sidewall and the second sidewall. The position of the plate connected to the first sidewall is located between the top cover and the vent in the second direction. The position of the plate connected to the second sidewall is located between the top cover and the first exhaust hole in the second direction.

6. The battery according to claim 5, characterized in that, The second boss also has a third sidewall, in the direction away from the first sidewall, one end of the first exhaust hole passes through the third sidewall and communicates with the exhaust channel.

7. The battery according to claim 5, characterized in that, The second boss also has a bottom wall connected between the second side wall and the third side wall and facing the cell assembly, and one end of the first vent hole penetrates the bottom wall of the second boss and communicates with the vent channel.

8. The battery according to claim 5, characterized in that, The first exhaust port is positioned directly opposite the vent in the first direction at one end that penetrates the second sidewall.

9. The battery according to claim 4, characterized in that, The two first sidewalls form a second cavity, and both vents are connected to the second cavity. The second cavity extends through the surface of the first protrusion facing the top cover so as to be able to communicate with the pressure relief valve.

10. The battery according to claim 9, characterized in that, The first boss has a bottom wall connected between the two first sidewalls and facing the battery cell assembly. The bottom wall of the first boss is provided with a through second vent hole, which communicates with the second cavity.

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