Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack, the battery module comprises: a battery pack, the battery pack comprises a plurality of cells, one end of each cell along a first direction is provided with a pole and an explosion-proof valve; the protection plate assembly is arranged on the side, provided with the pole column, of the battery cell in the first direction, the protection plate assembly is provided with an installation gap and a communication hole which are spaced, and the communication hole is opposite to the anti-explosion valve in the first direction. According to the battery module disclosed by the utility model, hot air and partial impurities flowing out of the explosion-proof valve can be discharged through the communicating hole when the battery cell is subjected to thermal runaway, so that the hot air and partial impurities are prevented from being sprayed out of the explosion-proof valve and then dispersed in any direction, and the damage of the hot air and partial impurities to the protection plate assembly is reduced; and hot air and partial impurities can be prevented from diffusing towards the mounting gap to influence the structures such as the conducting strip, so that the short circuit of the conducting strip is avoided, and the safety of the battery cell is improved.

Description

Technical Field

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

[0002] In the prior art, the material ejected from the battery cell during thermal runaway may adhere to the conductive sheet from the side, above or below the conductive sheet under high temperature and high pressure. At the same time, the commonly used protective plate components such as ceramic composite tape and mica paper will be separated from the conductive sheet under the high-pressure airflow generated during thermal runaway, and lose the protective effect, thereby causing the risk of short circuit between the conductive sheet and the battery cell top cover, and the safety is not high. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module, which reduces the damage of hot air and some impurities to the protective plate assembly, and can prevent hot air and some impurities from diffusing toward the installation gap to affect the conductive sheet, thereby improving the safety of the battery cell.

[0004] The utility model also provides a battery pack, comprising the above-mentioned battery module.

[0005] According to the battery module of the embodiment of the utility model, it includes: a battery pack, the battery pack includes a plurality of battery cells, one end of the battery cell along the first direction has a pole and an explosion-proof valve; a protective plate assembly, the protective plate assembly is arranged on the side of the battery cell having the pole along the first direction, the protective plate assembly has a spaced installation gap and a connecting hole, and the connecting hole is arranged opposite to the explosion-proof valve in the first direction.

[0006] According to the battery module of the embodiment of the utility model, the protective plate assembly is provided with a spaced installation gap and a connecting hole, and the connecting hole is opposite to the explosion-proof valve in the first direction. When the battery cell has thermal runaway, the hot air and some impurities flowing out of the explosion-proof valve can be discharged through the connecting hole, and the hot air and some impurities are prevented from being dispersed in any direction after being ejected from the explosion-proof valve, thereby reducing the damage of the hot air and some impurities to the protective plate assembly, and preventing the hot air and some impurities from diffusing toward the installation gap to affect the conductive sheet and other structures, thereby avoiding the short circuit of the conductive sheet, thereby improving the safety of the battery cell.

[0007] In some embodiments of the present invention, the protective plate assembly includes a first isolation plate and a second isolation plate which are stacked, the first isolation plate being located on a side of the second isolation plate away from the battery cell, the installation gap being defined between the first isolation plate and the second isolation plate, the connecting hole including a first through hole and a second through hole which are interconnected in the first direction, the first through hole being arranged on the first isolation plate, and the second through hole being arranged on the second isolation plate.

[0008] In some embodiments of the present invention, a protrusion is provided on the first isolation plate and is formed to protrude in a direction away from the second isolation plate, and the installation gap is formed between the protrusion and the second isolation plate.

[0009] In some embodiments of the present invention, the protrusions are multiple and spaced apart, a groove is formed between two adjacent protrusions, the first through hole is provided on the bottom wall of the groove, and the groove is spaced apart from the installation gap.

[0010] In some embodiments of the utility model, a first positioning hole is provided on the first isolation plate, and a first positioning pin matching with the first positioning hole is provided on the second isolation plate, or a first positioning pin is provided on the first isolation plate, and a first positioning hole matching with the first positioning pin is provided on the second isolation plate.

[0011] In some embodiments of the present invention, the protective plate assembly further includes: an explosion-proof plate, which is disposed in the first through hole and is used to block the first through hole.

[0012] In some embodiments of the present invention, the protective plate assembly also includes: a third isolation plate, the third isolation plate is embedded in the side of the second isolation plate away from the first isolation plate, and the connecting hole also includes a third through hole, and the third through hole is arranged on the third isolation plate.

[0013] In some embodiments of the utility model, an annular protrusion is provided on the side of the third isolation plate facing the second isolation plate, the annular protrusion is arranged around the third through hole, the annular protrusion is penetrated into the second through hole, an exhaust channel is formed in the annular protrusion, one end of the exhaust channel is connected to the third through hole, and the other end is connected to the first through hole.

[0014] In some embodiments of the utility model, the third isolation plate and the second isolation plate are integrated, and / or the second isolation plate is provided with a second positioning hole, and the third isolation plate is provided with a second positioning pin that matches the second positioning hole, or the second isolation plate is provided with a second positioning pin, and the third isolation plate is provided with a second positioning hole that matches the second positioning pin.

[0015] A battery pack according to an embodiment of the present invention includes the above-mentioned battery module.

[0016] According to the battery pack of the embodiment of the utility model, by setting the above-mentioned battery module, a spaced installation gap and a connecting hole are set on the protective plate assembly, and the connecting hole is opposite to the explosion-proof valve in the first direction. When the battery cell has thermal runaway, the hot air and some impurities flowing out of the explosion-proof valve can be discharged through the connecting hole, preventing the hot air and some impurities from being dispersed in any direction after being ejected from the explosion-proof valve, reducing the damage of the hot air and some impurities to the protective plate assembly, and preventing the hot air and some impurities from diffusing toward the installation gap to affect the conductive sheet and other structures, thereby avoiding the short circuit of the conductive sheet, thereby improving the safety of the battery cell.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is an exploded view of a battery module according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A in the enlarged view;

[0021] Figure 3 yes Figure 1 The enlarged view of point B in the figure;

[0022] Figure 4 yes Figure 1 The enlarged view of point C in the figure;

[0023] Figure 5 yes Figure 1 The enlarged view of D in the figure;

[0024] Figure 6 is a three-dimensional cross-sectional view of the internal structure of a battery pack according to an embodiment of the utility model, wherein the protective plate assembly is a three-dimensional cross-sectional view;

[0025] Figure 7 yes Figure 6 Enlarged view of point E in FIG.

[0026] Reference numerals:

[0027] 100. Battery pack;

[0028] 10. Battery module;

[0029] 1. Battery pack; 11. Battery cell; 12. Terminal; 13. Explosion-proof valve;

[0030] 2. Protective plate assembly; 21. First isolation plate; 211. Protrusion; 212. First positioning hole; 213. Groove; 22. Second isolation plate; 221. First positioning pin; 222. Second positioning hole; 23. Third isolation plate; 231. Annular protrusion; 232. Second positioning pin; 233. Exhaust channel; 24. Installation gap; 25. Communication hole; 251. First through hole; 252. Second through hole; 253. Third through hole; 26. Through hole; 27. Explosion-proof plate;

[0031] 3. Conductive sheet;

[0032] 4. layering strip; 41. main body; 42. side protrusion;

[0033] 5. Low voltage acquisition board. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Reference below Figure 1-Figure 7 A battery module 10 according to an embodiment of the present invention is described.

[0038] like Figure 1-Figure 7 As shown, the battery module 10 according to the embodiment of the utility model includes: a battery pack 1, a protection plate assembly 2 and a conductive sheet 3.

[0039] Specifically, refer to Figure 1-Figure 7 The battery pack 1 includes a plurality of battery cells 11, wherein, for example, in the present invention, the plurality of battery cells 11 are arranged along a third direction (such as Figure 1 c direction as shown), the battery cells 11 are arranged along the first direction (as shown Figure 1 The first direction is perpendicular to the third direction; the protective plate assembly 2 is arranged on the side of the battery cell 11 having the pole 12 along the first direction, and the protective plate assembly 2 has a spaced installation gap 24 and a connecting hole 25, and the connecting hole 25 is opposite to the explosion-proof valve 13 in the first direction. The installation gap 24 extends along the third direction, and the protective plate assembly 2 has a through hole 26 for the pole 12 to pass through; the conductive sheet 3 is arranged in the installation gap 24, and there are multiple conductive sheets 3, and the multiple conductive sheets 3 are used to connect the poles 12 of two adjacent battery cells 11, and the through hole 26 is arranged opposite to the pole 12 in the first direction and is connected to the installation gap 24.

[0040] It should be noted that the pole 12 includes a positive pole 12 and a negative pole 12, each battery cell 11 has a positive pole 12 and a negative pole 12, one end of each conductive sheet 3 is connected to the positive pole 12 of a battery cell 11, and the other end is connected to the negative pole 12 of another adjacent battery cell 11; and the through hole 26 is provided to facilitate the connection between the pole 12 and the conductive sheet 3, wherein there are multiple poles 12, and the through holes 26 are also multiple corresponding to each other, thereby, multiple batteries 11 can be connected in series, thereby increasing the overall voltage of the battery pack 1 and increasing the electric energy of the battery pack 1. At the same time, the conductive sheet 3 is connected to the pole 12 by welding. After the conductive sheet 3 and the pole 12 are welded, the conductive sheet 3 can effectively press the protective plate assembly 2, so that the protective plate assembly 2 fits tightly on the battery cell 11, and the installation reliability of the conductive sheet 3 and the protective plate assembly 2 is improved.

[0041] The explosion-proof valve 13 is provided so that when thermal runaway occurs inside the battery cell 11 , hot gas and some impurities can flow out from the explosion-proof valve 13 , thereby preventing the battery cell 11 from being over-pressurized and exploding, thereby improving safety.

[0042] It is understandable that, since the connecting hole 25 is opposite to the explosion-proof valve 13 in the first direction, when the battery cell 11 has thermal runaway, the hot air and some impurities flowing out of the explosion-proof valve 13 can flow to the outside through the connecting hole 25, thereby preventing the hot air and some impurities from being dispersed in any direction after being ejected from the explosion-proof valve 13, and achieving the directional overflow of the hot air and some impurities to the outside. This reduces the damage of the hot air and some impurities to the protective plate assembly 2, and also reduces the influence of the hot air and some impurities on the connection between the protective plate assembly 2 and the battery cell 11, thereby making the protective plate assembly 2 more stable and improving the protective effect of the protective plate assembly 2.

[0043] At the same time, since the conductive sheet 3 is arranged in the installation gap 24, the installation gap 24 and the connecting hole 25 are separated, it is possible to prevent hot air and some impurities from diffusing toward the installation gap 24 and affecting the conductive sheet 3, thereby preventing impurities from adhering to the conductive sheet 3, and also preventing the protective plate assembly 2 at the conductive sheet 3 from falling off and causing failure, thereby preventing the conductive sheet 3 from short-circuiting, thereby improving the safety of the battery cell 11.

[0044] The conductive sheet 3 may be a copper bar, an aluminum bar, etc., so as to achieve circuit connectivity.

[0045] According to the battery module 10 of the embodiment of the utility model, the protective plate assembly 2 is provided with a spaced installation gap 24 and a connecting hole 25, and the connecting hole 25 is opposite to the explosion-proof valve 13 in the first direction. When the battery cell 11 has thermal runaway, the hot air and some impurities flowing out of the explosion-proof valve 13 can be discharged through the connecting hole 25, so as to prevent the hot air and some impurities from being dispersed in any direction after being ejected from the explosion-proof valve 13, thereby reducing the damage of the hot air and some impurities to the protective plate assembly 2, and preventing the hot air and some impurities from diffusing toward the installation gap 24 to affect the conductive sheet 3 and other structures, thereby preventing the conductive sheet 3 from being short-circuited, thereby improving the safety of the battery cell 11.

[0046] In some embodiments of the present invention, Figure 1-Figure 5 and Figure 7As shown, the protective plate assembly 2 includes a first isolation plate 21 and a second isolation plate 22 which are stacked, the first isolation plate 21 is located on the side of the second isolation plate 22 away from the battery cell 11, an installation gap 24 is defined between the first isolation plate 21 and the second isolation plate 22, and the connecting hole 25 includes a first through hole 251 and a second through hole 252 which are interconnected in a first direction, the first through hole 251 is arranged on the first isolation plate 21, and the second through hole 252 is arranged on the second isolation plate 22.

[0047] It can be understood that an installation gap 24 is defined between the first isolation plate 21 and the second isolation plate 22, and the conductive sheet 3 is arranged in the installation gap 24, so that the first isolation plate 21 and the second isolation plate 22 can form a protection for the conductive sheet 3, wherein the second isolation plate 22 has a through hole 26 for the pole 12 to pass through, thereby facilitating the connection between the pole 12 and the conductive sheet 3. The first through hole 251 penetrates the first isolation plate 21, and the second through hole 252 penetrates the second isolation plate 22, and the first through hole 251 and the second through hole 252 are connected, thereby facilitating the outflow of hot gas and impurities from the first through hole 251 and the second through hole 252.

[0048] At the same time, it can also further prevent hot air and some impurities from dispersing in any direction after being ejected from the explosion-proof valve 13, thereby reducing the damage of hot air and some impurities to the protective plate assembly 2, and also reducing the influence of hot air and some impurities on the connection between the protective plate assembly 2 and the battery cell 11, thereby making the protective plate assembly 2 more stable, thereby improving the protective effect of the protective plate assembly 2.

[0049] Furthermore, the first isolation plate 21 and the second isolation plate 22 can be connected by heat riveting and / or bonding and / or clamping, etc. Thus, the connection reliability of the first isolation plate 21 and the second isolation plate 22 is improved.

[0050] In some embodiments of the present invention, Figure 1 , Figure 5 and Figure 7 As shown, the first isolation plate 21 is provided with a protrusion 211 protruding in a direction away from the second isolation plate 22, and the installation gap 24 is formed between the protrusion 211 and the second isolation plate 22. It can be understood that by providing the protrusion 211, it is convenient to form the installation gap 24 of the utility model, thereby facilitating the installation of structures such as the conductive sheet 3.

[0051] In some embodiments of the present invention, Figure 1 , Figure 5 and Figure 7 As shown, there are a plurality of spaced-apart protrusions 211 , a groove 213 is formed between two adjacent protrusions 211 , a first through hole 251 is provided on the bottom wall of the groove 213 , and the groove 213 is spaced apart from the installation gap 24 .

[0052] For example, in the present invention, there are two protrusions 211 spaced apart along the second direction, but the present invention is not limited thereto, and there may be more protrusions 211 , such as 3, 4, 5 or 6 protrusions.

[0053] It is understandable that when the battery cell 11 has thermal runaway, the hot gas and some impurities are discharged from the explosion-proof valve 13 to the second through hole 252, and then to the first through hole 251. After being discharged from the first through hole 251, they enter the groove 213. At this time, the two side walls in the width direction of the groove 213 can block the hot gas and some impurities, so that the hot gas and some impurities can be discharged from the notch of the groove 213 to the outside, achieving directional overflow of the hot gas and some impurities. As a result, it is further prevented that the hot gas and some impurities are dispersed in any direction after being ejected from the explosion-proof valve 13, thereby reducing the damage of the hot gas and some impurities to the protective plate assembly 2, and also reducing the influence of the hot gas and some impurities on the connection between the protective plate assembly 2 and the battery cell 11, making the protective plate assembly 2 more stable, thereby improving the protective effect of the protective plate assembly 2.

[0054] At the same time, since the groove 213 is separated from the installation gap 24, the two side walls of the groove 213 along the width direction can block hot air and some impurities from diffusing toward the installation gap 24 and affecting the conductive sheet 3, further avoiding the adhesion of impurities to the conductive sheet 3, and also avoiding the protection plate assembly 2 at the conductive sheet 3 from falling off and causing failure, thereby avoiding short circuit of the conductive sheet 3 and improving the safety of the battery cell 11.

[0055] In some embodiments of the present invention, Figure 1 , Figure 4 and Figure 5 As shown, the first isolation plate 21 is provided with a first positioning hole 212, and the second isolation plate 22 is provided with a first positioning pin 221 matched with the first positioning hole 212, or the first isolation plate 21 is provided with a first positioning pin 221, and the second isolation plate 22 is provided with a first positioning hole 212 matched with the first positioning pin 221. For example, in the present utility model, the first positioning hole 212 is provided on the first isolation plate 21, and the first positioning pin 221 is provided on the second isolation plate 22.

[0056] It can be understood that the mutual cooperation between the first positioning hole 212 and the first positioning pin 221 improves the connection reliability of the first isolation plate 21 and the second isolation plate 22. At the same time, the mutual cooperation between the first positioning hole 212 and the first positioning pin 221 improves the portability of the connection between the first isolation plate 21 and the second isolation plate 22, thereby facilitating the subsequent installation and connection of the first isolation plate 21 and the second isolation plate 22 and improving the installation efficiency.

[0057] Furthermore, if Figure 1 , Figure 4 and Figure 5 As shown, the first positioning hole 212 is along the second direction (such as Figure 1 The first isolation plate 21 and the second isolation plate 22 are connected to each other in a plurality of rows (in the direction b shown in the figure), each row of first positioning holes 212 includes a plurality of first positioning holes 212 spaced apart along the third direction, and the first positioning posts are a plurality of first positioning holes 212 corresponding one to one with the first positioning holes 212, thereby further improving the connection reliability of the first isolation plate 21 and the second isolation plate 22. The first direction, the second direction and the third direction are perpendicular to each other.

[0058] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the explosion-proof plate 27 is disposed in the first through hole 251 to block the first through hole 251, thereby improving the sealing performance.

[0059] Furthermore, the thickness of the explosion-proof plate 27 along the first direction is less than the thickness of the first isolation plate 21. It is understandable that when thermal runaway occurs, since the thickness of the explosion-proof plate 27 along the first direction is less than the thickness of the first isolation plate 21, it is convenient for hot gas to break through the explosion-proof plate 27 and flow out from the first through hole 251, so that the first through hole 251 plays a role of drainage, which is further convenient for guiding the hot gas and some impurities flowing out of the explosion-proof valve 13 to the outside for ejection, thereby preventing the hot gas and some impurities from being dispersed in any direction after being ejected from the explosion-proof valve 13, thereby reducing the damage of the hot gas and some impurities to the protective plate assembly 2, and also reducing the influence of the hot gas and some impurities on the connection between the protective plate assembly 2 and the battery cell 11, thereby making the protective plate assembly 2 more stable, thereby improving the protective effect of the protective plate assembly 2.

[0060] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the protective plate assembly 2 also includes: a third isolation plate 23, which is embedded in the side of the second isolation plate 22 away from the first isolation plate 21, and the connecting hole 25 also includes a third through hole 253, and the third through hole 253 is arranged on the third isolation plate 23. The arrangement of the first isolation plate 21, the second isolation plate 22 and the third isolation plate 23 can make the structural strength of the protective plate assembly 2 higher and the structure more stable, thereby improving the protection reliability of the protective plate assembly 2.

[0061] Furthermore, if Figure 1 and Figure 2-Figure 5 As shown, a portion of the first isolation plate 21 protrudes in a direction away from the second isolation plate 22 to form a protrusion 211. In the first direction, the third isolation plate 23 is arranged opposite to the protrusion 211, thereby facilitating the mutual connection of the first through hole 251, the second through hole 252 and the third through hole 253.

[0062] In some embodiments of the present invention, Figure 1 , Figure 3 and Figure 4 As shown, a ring-shaped protrusion 231 is provided on one side of the third isolation plate 23 facing the first isolation plate 21, the ring-shaped protrusion 231 is arranged around the third through hole 253, the ring-shaped protrusion 231 is penetrated in the second through hole 252, an exhaust channel 233 is formed in the ring-shaped protrusion 231, one end of the exhaust channel 233 is connected to the third through hole 253, and the other end is connected to the first through hole 251. It can be understood that when the battery cell 11 has thermal runaway, the gas flows from the explosion-proof valve 13 to the third through hole 253, then enters the exhaust channel 233, and flows to the outside from the first through hole 251.

[0063] Therefore, the setting of the annular protrusion 231 makes it easier for the airflow of thermal runaway to flow from the third through hole 253 to the first through hole 251, thereby further preventing the hot air and some impurities from being sprayed out from the explosion-proof valve 13 and then dispersing in any direction at the second through hole 252. At the same time, it can also further prevent the hot air and some impurities from diffusing toward the installation gap 24 and affecting the conductive sheet 3, thereby avoiding the attachment of impurities to the conductive sheet 3, and also avoiding the failure caused by the falling off of the protective plate assembly 2 at the conductive sheet 3, thereby avoiding the short circuit of the conductive sheet 3 and improving the safety of the battery cell 11.

[0064] Furthermore, if Figure 1 , Figure 3 and Figure 4 As shown, one end of the annular protrusion 231 away from the third isolation plate 23 is flush with one end of the second through hole 252 away from the third isolation plate 23 , thereby avoiding installation interference between the annular protrusion 231 and the first isolation plate 21 .

[0065] In some embodiments of the utility model, the third isolation plate 23 and the second isolation plate 22 are integrated, thereby improving the integrity of the third isolation plate 23 and the second isolation plate 22, thereby improving the sealing between the third isolation plate 23 and the second isolation plate 22, thereby preventing hot air and some impurities from diffusing toward the installation gap 24 through the gap between the second isolation plate 22 and the third isolation plate 23 and affecting the conductive sheet 3, thereby further preventing impurities from adhering to the conductive sheet 3, and also preventing the protective plate assembly 2 at the conductive sheet 3 from falling off and causing failure, thereby avoiding a short circuit of the conductive sheet 3, thereby making the protective plate assembly 2 more stable and reliable, thereby improving the protective effect of the protective plate assembly 2.

[0066] In some embodiments of the present invention, Figure 1 , Figure 3 and Figure 4As shown, the second isolation plate 22 is provided with a second positioning hole 222, and the third isolation plate 23 is provided with a second positioning pin 232 matched with the second positioning hole 222, or the second isolation plate 22 is provided with a second positioning pin 232, and the third isolation plate 23 is provided with a second positioning hole 222 matched with the second positioning pin 232. For example, in the present utility model, the second isolation plate 22 is provided with a second positioning hole 222, and the third isolation plate 23 is provided with a second positioning pin 232 matched with the second positioning hole 222.

[0067] It can be understood that the mutual cooperation between the second positioning hole 222 and the second positioning pin 232 improves the connection reliability between the second isolation plate 22 and the third isolation plate 23. At the same time, the mutual cooperation between the second positioning hole 222 and the second positioning pin 232 improves the portability of the connection between the second isolation plate 22 and the third isolation plate 23, thereby facilitating the subsequent installation and connection of the third isolation plate 23 and the second isolation plate 22 and improving the installation efficiency.

[0068] Furthermore, if Figure 1 , Figure 3 and Figure 4 As shown, the second positioning holes 222 are arranged in multiple rows spaced apart along the second direction, each row of second positioning holes 222 includes multiple second positioning holes 222 spaced apart along the third direction, and the second positioning columns are multiple second positioning holes 222 corresponding one-to-one to the second positioning holes 222, thereby further improving the connection reliability between the third isolation plate 23 and the second isolation plate 22.

[0069] In addition, the third isolation plate 23 and the second isolation plate 22 can be connected by secondary injection molding, gluing, hot melting, riveting, interference fit, ultrasonic welding, etc., thereby improving the connection reliability of the third isolation plate 23 and the second isolation plate 22.

[0070] In some embodiments of the present invention, the first isolation plate 21 is a mica plate; it is understood that the mica plate has good insulation and heat resistance, so the first isolation plate 21 is a mica plate, which can reduce leakage of the battery cell 11 and the conductive sheet 3 and improve safety. At the same time, it also reduces the melting of the first isolation plate 21 when thermal runaway occurs, thereby improving the structural reliability of the first isolation plate 21, thereby improving the protection reliability of the protection plate assembly 2.

[0071] In some embodiments of the present invention, the second isolation plate 22 is a plastic plate; it is understood that the plastic plate has good insulation and heat resistance, so the second isolation plate 22 is a plastic plate, which can reduce leakage of the battery cell 11 and the conductive sheet 3, and avoid short circuit between the battery cell 11 and the conductive sheet 3, thereby improving safety. At the same time, it also reduces the melting of the second isolation plate 22 when thermal runaway occurs, thereby improving the structural reliability of the second isolation plate 22, thereby improving the protection reliability of the protection plate assembly 2.

[0072] In some embodiments of the utility model, the third isolation plate 23 is a plastic plate. It is understood that the plastic plate has good insulation and heat resistance. Therefore, the third isolation plate 23 is a plastic plate, which can reduce leakage of the battery cell 11 and the conductive sheet 3, and avoid short circuit between the battery cell 11 and the conductive sheet 3, thereby improving safety. At the same time, it also reduces the melting of the third isolation plate 23 when thermal runaway occurs, thereby improving the structural reliability of the second isolation plate 22, thereby improving the protection reliability of the protective plate assembly 2.

[0073] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, there are two poles 12 spaced apart along the second direction, the explosion-proof valve 13 is located between the two poles 12, there are two installation gaps 24, and the two installation gaps 24 are respectively arranged opposite to the two poles 12 in the first direction.

[0074] It can be understood that, of the two poles 12, one is the positive pole 12, and the other is the negative pole 12. In two adjacent battery cells 11, the positive pole 12 of one battery cell 11 and the negative pole 12 of the other battery cell 11 are arranged adjacent to each other in a third direction, and the conductive sheet 3 respectively connects the positive pole 12 of one battery cell 11 and the negative pole 12 of the other battery cell 11 of the two adjacent battery cells 11, thereby realizing the positive and negative pole connection of the two adjacent battery cells 11, thereby realizing the series connection of the two adjacent battery cells 11.

[0075] In some embodiments of the present invention, Figure 1 , Figure 6 and Figure 7 As shown, the battery module 10 further includes: a pressure strip 4, the pressure strip 4 and the protection plate assembly 2 are arranged at the same end of the battery cell 11, the pressure strip 4 is connected to the battery cell 11, and a portion of the pressure strip 4 is arranged on the side of the protection plate assembly 2 away from the battery cell 11 and abuts against the protection plate assembly 2. The pressure strip 4 is an insulating member.

[0076] Therefore, by setting the pressure strip 4, the pressure strip 4 can press the protective plate assembly 2, thereby improving the installation stability of the protective plate assembly 2 on the battery cell 11, thereby further reducing the possibility of the protective plate assembly 2 falling off, thereby improving the protection reliability of the protective plate assembly 2 for the conductive sheet 3 and the battery cell 11.

[0077] In some embodiments of the present invention, Figure 1 , Figure 6 and Figure 7 As shown, the pressure strip 4 includes a main body 41 and side protrusions 42 arranged on both sides of the main body 41 along the second direction. The main body 41 is connected to the battery cell 11, and the side protrusions 42 close to the protective plate assembly 2 abut against the side of the protective plate assembly 2 away from the battery cell 11. The first direction, the second direction and the third direction are perpendicular to each other.

[0078] It should be noted that the main body 41 and the battery cell 11 can be connected by bonding and / or fastener connection, thereby improving the connection reliability between the pressure strip 4 and the battery cell 11, so that the pressure strip 4 can further press the protective plate assembly 2, thereby improving the installation stability of the protective plate assembly 2 on the battery cell 11, thereby further reducing the possibility of the protective plate assembly 2 falling off, thereby improving the protection reliability of the protective plate assembly 2 for the conductive sheet 3 and the battery cell 11.

[0079] It can be understood that the side protrusion 42 abuts against the side of the protective plate assembly 2 away from the battery cell 11, so as to facilitate pressing the protective plate assembly 2, thereby limiting the movement of the protective plate assembly 2 in the direction away from the battery cell 11, thereby reducing the possibility of the protective plate assembly 2 falling off, thereby improving the protection reliability of the protective plate assembly 2 for the conductive sheet 3 and the battery cell 11.

[0080] In some embodiments of the present invention, Figure 1 , Figure 6 and Figure 7 As shown, the battery module 10 further includes: a low voltage collection plate 5 , which is disposed in the installation gap 24 , and is disposed on a side of the conductive sheet 3 away from the battery cell 11 and connected to the conductive sheet 3 .

[0081] It can be understood that the low-voltage acquisition board 5 is used to collect the temperature and voltage in each component of the battery module 10, and the low-voltage acquisition board 5 is connected to the conductive sheet 3, so that the battery cell 11 can supply power to the low-voltage acquisition board 5. Since the low-voltage acquisition board 5 is located in the installation gap 24, the installation gap 24 is separated from the connecting hole 25, so that when thermal runaway occurs, the protection board assembly 2 still has a good protection effect on the low-voltage acquisition circuit, and after thermal runaway, the voltage and temperature of each component of the battery module 10 (except the thermal runaway area of ​​the battery cell 11) can still be collected.

[0082] Please refer to the following Figure 6 and attached Figure 7 A battery pack 100 according to an embodiment of the present invention is described.

[0083] like Figure 6 and Figure 7 As shown, a battery pack 100 according to an embodiment of the present invention includes the above-mentioned battery module 10 .

[0084] Specifically, refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the battery modules 10 are multiple and connected to each other along the second direction, and a pressure strip 4 is provided between two adjacent battery modules 10, and one of the side protrusions 42 of the pressure strip 4 abuts against the side of the protective plate assembly 2 of one of the battery modules 10 away from the battery cell 11, and the other side protrusion 42 abuts against the side of the protective plate assembly 2 of another battery module 10 away from the battery cell 11. Thus, the connection between adjacent battery modules 10 can be reliable and stable. In addition, the main body 41 and the protective plate assembly 2 can insulate the adjacent battery modules 10, thereby avoiding short circuits between the conductive sheets 3 in the adjacent battery modules 10, thereby avoiding short circuits between the adjacent battery modules 10.

[0085] According to the battery pack 100 of the embodiment of the utility model, by setting the above-mentioned battery module 10, the spaced installation gap 24 and the connecting hole 25 are set on the protective plate assembly 2, and the connecting hole 25 is opposite to the explosion-proof valve 13 in the first direction. When the battery cell 11 has thermal runaway, the hot air and some impurities flowing out of the explosion-proof valve 13 can be discharged through the connecting hole 25, so as to prevent the hot air and some impurities from being dispersed in any direction after being ejected from the explosion-proof valve 13, thereby reducing the damage of the hot air and some impurities to the protective plate assembly 2, and preventing the hot air and some impurities from diffusing toward the installation gap 24 to affect the conductive sheet 3 and other structures, thereby avoiding the short circuit of the conductive sheet 3, thereby improving the safety of the battery cell 11.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: A battery pack, the battery pack comprising a plurality of battery cells, one end of each battery cell along a first direction having a pole and an explosion-proof valve; A protection plate assembly is arranged on a side of the battery cell having the pole along a first direction, and the protection plate assembly has a spaced-apart installation gap and a connecting hole, and the connecting hole is arranged opposite to the explosion-proof valve in the first direction.

2. The battery module according to claim 1, characterized in that: The protective plate assembly includes a first isolation plate and a second isolation plate which are stacked, wherein the first isolation plate is located on a side of the second isolation plate away from the battery cell, and the installation gap is defined between the first isolation plate and the second isolation plate. The communicating holes include a first through hole and a second through hole that are connected to each other in the first direction, the first through hole is provided on the first isolation plate, and the second through hole is provided on the second isolation plate.

3. The battery module according to claim 2, characterized in that: The first isolation plate is provided with a protrusion that is formed to protrude in a direction away from the second isolation plate, and the installation gap is formed between the protrusion and the second isolation plate.

4. The battery module according to claim 3, characterized in that: The protrusions are multiple and spaced apart, a groove is formed between two adjacent protrusions, the first through hole is arranged on the bottom wall of the groove, and the groove is spaced apart from the installation gap.

5. The battery module according to claim 2, characterized in that: The first isolation plate is provided with a first positioning hole, and the second isolation plate is provided with a first positioning pin matched with the first positioning hole. Alternatively, a first positioning pin is provided on the first isolation plate, and a first positioning hole matching with the first positioning pin is provided on the second isolation plate.

6. The battery module according to claim 2, characterized in that: The protective plate assembly also includes: An explosion-proof plate is disposed in the first through hole and is used to block the first through hole.

7. The battery module according to claim 2, characterized in that: The protection plate assembly further includes: a third isolation plate, which is embedded in a side of the second isolation plate away from the first isolation plate, and the connecting hole further includes a third through hole, which is arranged on the third isolation plate.

8. The battery module according to claim 7, characterized in that: An annular protrusion is provided on one side of the third isolation plate facing the second isolation plate. The annular protrusion is arranged around the third through hole and penetrates into the second through hole. An exhaust channel is formed in the annular protrusion, one end of the exhaust channel is connected to the third through hole, and the other end is connected to the first through hole.

9. The battery module according to claim 7, characterized in that: The third isolation plate and the second isolation plate are integrated into one piece, And / or, the second isolation plate is provided with a second positioning hole, and the third isolation plate is provided with a second positioning pin that matches the second positioning hole, or, the second isolation plate is provided with a second positioning pin, and the third isolation plate is provided with a second positioning hole that matches the second positioning pin.

10. A battery pack, characterized in that: Comprising a battery module according to any one of claims 1-9.

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