Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment.The battery pack comprises a box body, a partition plate and battery monomers, the box body defines a containing space, the partition plate is arranged in the containing space and divides the containing space into a first cavity and a second cavity, and the battery monomers are arranged in the first cavity; the battery monomer comprises a first wall and a pressure relief mechanism, the pressure relief mechanism is arranged on the first wall, the first wall and the pressure relief mechanism face the partition plate, the partition plate comprises a first plate part, a blocking ring and a second plate part, the first plate part is provided with a first through hole, the first through hole penetrates through the first plate part in the first direction, and the second plate part is provided with a second through hole; the blocking ring is arranged between the hole wall of the first through hole and the outer circumferential face of the second plate part so as to separate the first plate part from the second plate part, and the blocking ring is configured to be an insulating piece. The technical problem that short circuit of a battery pack is easily caused by sprayed high-temperature and high-pressure substances when thermal runaway occurs to single batteries is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an electrical equipment. BACKGROUND

[0002] With the increasing of electrical equipment, the use of batteries is more and more widely. The battery pack divides the internal space into an exhaust area and a battery area by a partition plate. The battery monomer is arranged in the battery area. The battery monomer has an explosion-proof valve (which is actually a pressure relief mechanism). The explosion-proof valve faces the exhaust area. When the battery monomer is in thermal runaway, the high-temperature and high-pressure substances sprayed from the explosion-proof valve rush to the exhaust area, reducing the influence of the runaway battery monomer on the normal battery monomer. However, in the related art, when the battery monomer is in thermal runaway, the high-temperature and high-pressure substances sprayed are easy to damage the insulating layer on the partition plate, thereby causing short circuit of the battery pack. SUMMARY

[0003] The present application provides a battery pack and an electrical equipment, which solves the technical problem that when the battery monomer is in thermal runaway, the high-temperature and high-pressure substances sprayed are easy to cause short circuit of the battery pack.

[0004] In order to achieve the above purpose, the main technical scheme adopted by the present application includes:

[0005] In a first aspect, the present application provides a battery pack. The battery pack includes a box body, a partition plate, and a battery monomer. The box body defines an accommodation space. The partition plate is arranged in the accommodation space and divides the accommodation space into a first chamber and a second chamber. The battery monomer is arranged in the first chamber. The battery monomer includes a first wall and a pressure relief mechanism. The pressure relief mechanism is arranged on the first wall. Both the first wall and the pressure relief mechanism face the partition plate. The partition plate includes a first plate portion, a blocking ring, and a second plate portion. The first plate portion has a first through hole. In a first direction, the first through hole penetrates the first plate portion. The second plate portion is fixedly installed in the first through hole. The partition plate fixedly connects the first plate portion and the second plate portion. The second plate portion has a second through hole. In the first direction, the second through hole penetrates the second plate portion and is arranged opposite to the pressure relief mechanism. The blocking ring is arranged between the hole wall of the first through hole and the outer circumferential surface of the second plate portion to separate the first plate portion and the second plate portion. The blocking ring is configured as an insulating piece. The first direction is parallel to the thickness direction of the partition plate.

[0006] The battery pack provided by the embodiments of the present application is characterized in that the blocking ring is arranged between the hole wall of the first through hole and the outer circumferential surface of the second plate part. When the battery monomer is out of control, the high-temperature conductive substance is sprayed from the pressure relief mechanism. Since the pressure relief mechanism is arranged opposite to the second through hole, the high-temperature conductive substance can contact the second plate part. The blocking ring is arranged between the second plate part and the first plate part, and can block the electrical connection between the first plate part and the second plate part, so as to ensure the insulation between the thermal runaway battery monomer and other normal battery monomers, avoid the thermal runaway battery monomer from being connected to other normal battery monomers through the discharged high-temperature high-pressure substance and the partition plate, and cause short circuit due to the electrical connection between the thermal runaway battery monomer and other normal battery monomers, thereby improving the use safety and reliability of the battery pack.

[0007] Optionally, the first plate part and the second plate part are both metal pieces.

[0008] The first plate part and the second plate part are metal pieces, which can make the first plate part and the second plate part have high strength and hardness, effectively resist external impact and vibration, thereby preventing the battery monomers inside the battery pack from being damaged and improving the strength and durability of the structure of the battery pack.

[0009] Optionally, the structural strength of any one of the first plate part and the second plate part is greater than the structural strength of the blocking ring.

[0010] The structural strength of any one of the first plate part and the second plate part is greater than the structural strength of the blocking ring, which can avoid the high-pressure substance sprayed from the thermal runaway battery monomer from damaging the first plate part or the second plate part, thereby improving the reliability of the battery pack.

[0011] Optionally, along the first direction, the partition plate has a first side surface facing the first wall and a second side surface away from the first wall, and along the first direction, the blocking ring includes a blocking ring body and a first limiting part. The blocking ring body is arranged between the hole wall of the first through hole and the outer circumferential surface of the second plate part, and the first limiting part protrudes from the first side surface and contacts the first wall.

[0012] The first limiting part protrudes from the first side surface and contacts the first wall. The first limiting part can reduce the probability of the first wall contacting the first plate part and the second plate part, thereby reducing the probability of the battery monomer being short-circuited, and improving the stability and reliability of the battery pack.

[0013] Optionally, along the first direction, the area of the first limiting part in the orthographic projection of the first wall is greater than the area of the blocking ring body in the orthographic projection of the first wall.

[0014] The first limiting part has a projection area on the first wall greater than the projection area of the blocking ring body on the first wall, so that the first limiting part fully abuts against the first side surface, the blocking ring is more firmly connected with the first plate part and the second plate part, the probability of disconnection of the blocking ring from the first plate part or the second plate part is reduced, the stability of insulation between the first plate part and the second plate part is ensured, and the stability and reliability of the battery pack are improved.

[0015] Optionally, along the first direction, the blocking ring further comprises a second limiting part, the second limiting part and the first limiting part are respectively arranged at two ends of the blocking ring body, and the second limiting part protrudes from the second side surface.

[0016] The second limiting part can also protrude from the second side surface, the second limiting part extends away from the second through hole, the second limiting part abuts against the second side surface, the connection between the blocking ring and the first plate part or the second plate part is more stable, the risk of connection failure of the two is reduced, and the probability of failure of the battery pack is reduced.

[0017] Optionally, along the first direction, the second limiting part has a projection area on the first wall greater than the projection area of the blocking ring body on the first wall.

[0018] The second limiting part has a projection area on the first wall greater than the projection area of the blocking ring body on the first wall, so that the second limiting part fully abuts against the second side surface, the blocking ring is more firmly connected with the first plate part and the second plate part, the probability of disconnection of the blocking ring from the first plate part or the second plate part is reduced, the stability of insulation between the first plate part and the second plate part is ensured, and the stability and reliability of the battery pack are improved.

[0019] Optionally, along the first direction, the pressure relief mechanism has a projection on the second plate part falling into the second through hole.

[0020] The pressure relief mechanism has a projection on the second plate part falling into the second through hole, so that high-temperature and high-pressure substances discharged by the thermal runaway battery monomer cannot damage the blocking ring, other normal battery monomers are prevented from being affected, and the safety of the battery pack is improved.

[0021] Optionally, along the first direction, the blocking ring has a projection on the first wall surrounding the pressure relief mechanism, and the first through hole has a projection on the first wall covering the pressure relief mechanism.

[0022] The blocking ring has a projection on the first wall surrounding the pressure relief mechanism, and the first through hole has a projection on the first wall covering the pressure relief mechanism, so that high-temperature and high-pressure substances discharged by the thermal runaway battery monomer cannot damage the blocking ring, other normal battery monomers are prevented from being affected, and the safety of the battery pack is improved.

[0023] Optionally, the battery pack comprises a plurality of battery cell groups arranged along a third direction, each battery cell group comprises a plurality of battery cells arranged along a second direction, the first direction, the second direction and the third direction are perpendicular to each other, the first through hole, the barrier ring and the second plate part are all a plurality of, the barrier ring is arranged between the hole wall of the corresponding first through hole and the outer circumferential surface of the corresponding second plate part, and along the first direction, the pressure relief mechanism of each battery cell is arranged opposite to the second through hole of the corresponding second plate part.

[0024] The pressure relief mechanism of each battery cell is arranged opposite to the second through hole of the corresponding second plate part, when thermal runaway occurs in the battery cell, the high-temperature conductive substance can be sprayed out through the pressure relief mechanism, then enter the second cavity along the second through hole, and then realize the discharge of the high-temperature and high-pressure substance, ensure the separation of the high-temperature and high-pressure substance and the battery cell in the first cavity, ensure that other normal battery cells are not affected by the high-temperature and high-pressure substance discharged by the thermal runaway battery cell, avoid the thermal runaway chain reaction caused by thermal diffusion, and effectively improve the safety of the battery pack.

[0025] In a second aspect, the embodiments of the present application further provide a power consumption device comprising the battery pack of any one of the embodiments of the present application.

[0026] The power consumption device provided by the embodiments of the present application, the barrier ring is arranged between the hole wall of the first through hole and the outer circumferential surface of the second plate part, when the battery cell loses control, when the high-temperature and high-pressure substance is sprayed out from the pressure relief mechanism, the high-temperature conductive substance will contact the second plate part because the pressure relief mechanism is arranged opposite to the second through hole, the barrier ring is arranged between the second plate part and the first plate part, can block the electrical connection between the first plate part and the second plate part, ensure the insulation between the thermal runaway battery cell and other normal battery cells, avoid the thermal runaway battery cell connected to the separation plate through the discharged high-temperature and high-pressure substance, and cause short circuit with other normal battery cells, and improve the safety of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0028] Figure 1 The structural schematic diagram of the battery pack provided by an embodiment of the present application is shown in the figure;

[0029] Figure 2 The top view of Figure 1 ;

[0030] Figure 3 TheFigure 2 A-A direction;

[0031] Figure 4 is an exploded structural schematic view; Figure 1

[0032] Figure 5 shows the structure of the pressure relief mechanism and the partition plate;

[0033] Figure 6 shows the structure of the blocking ring of an embodiment of the present application.

[0034]

BRIEF DESCRIPTION OF DRAWINGS

[0035] Battery pack 100; box 110; partition plate 120; first side 120A; second side 120B; first plate portion 121; first through hole 121A; blocking ring 122; blocking ring body 122A; first limiting portion 122B; second limiting portion 122C; second plate portion 123; second through hole 123A; first cavity 130; second cavity 140; battery monomer group 150; battery monomer 150A; first wall 160; pressure relief mechanism 161; adhesive layer 170; containing space 180; first direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0036] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise, belong to the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" in the specification and claims of the present application and their any variants are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0038] ​Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to one of ordinary skill in the art, embodiments described in this application can be combined with one another.

[0039] In the description of the application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] The term "and / or" in this application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0041] "Multiple" appearing in this application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] With the increasing of electrical equipment, the use of batteries is more and more widely. The battery pack divides the internal space into an exhaust area and a battery area by a partition plate, and the partition plate is mostly made of metal material, which has relatively good mechanical properties and thermal conductivity. The battery monomer is arranged in the battery area, and the battery monomer has an explosion-proof valve (i.e., a pressure relief mechanism), which faces the exhaust area. When the battery monomer is in thermal runaway, the high-temperature and high-pressure substances sprayed from the explosion-proof valve rush to the exhaust area through the through hole of the partition plate, reducing the influence of the runaway battery monomer on the normal battery monomer.

[0043] However, in the related art, the high-temperature and high-pressure substances sprayed when the battery monomer is in thermal runaway have conductivity, which easily damages the insulating layer on the partition plate and contacts the partition plate, thereby causing short circuit of the battery pack or other electrical components.

[0044] In view of this, in order to solve the technical problem that the battery monomer in thermal runaway sprays high-temperature and high-pressure substances, which easily causes short circuit of the battery pack, embodiments of the application provide a battery pack and an electrical equipment. The battery pack comprises a box body, a partition plate and a battery monomer.

[0045] The box body defines a containing space, a partition plate is arranged in the containing space and separates the containing space into a first chamber and a second chamber, a battery monomer is arranged in the first chamber, the battery monomer comprises a first wall and a pressure relief mechanism, the pressure relief mechanism is arranged on the first wall, and the first wall and the pressure relief mechanism are both towards the partition plate, wherein the partition plate comprises a first plate part, a blocking ring and a second plate part, the first plate part has a first through hole, the first through hole penetrates through the first plate part in the thickness direction of the partition plate, the second plate part is fixedly installed in the first through hole, the partition plate fixedly connects the first plate part and the second plate part, the second plate part has a second through hole, the second through hole penetrates through the second plate part in the thickness direction of the partition plate and is arranged opposite to the pressure relief mechanism, and the blocking ring is arranged between the hole wall of the first through hole and the outer circumferential surface of the second plate part to space the first plate part and the second plate part apart, and the blocking ring is configured as an insulating piece.

[0046] In the above scheme, along the first direction, the second through hole penetrates through the second plate part and is arranged opposite to the pressure relief mechanism, substances sprayed out when the battery monomer is out of control can be sprayed out through the second through hole, the probability of normal voltage being destroyed is reduced, the blocking ring is arranged between the hole wall of the first through hole and the outer circumferential surface of the second plate part to space the first plate part and the second plate part apart, and the blocking ring is configured as an insulating piece, so that the conduction between the first plate part and the second plate part is interrupted, and the probability of short circuit of the battery pack is reduced.

[0047] The following embodiments are described by taking the battery pack 100 of an embodiment of the application as an example for convenience of description.

[0048] Please refer to Figures 1 to 5 , Figure 1 the structural schematic diagram of the battery pack 100 provided by an embodiment of the application; Figure 2 is Figure 1 a top view; Figure 3 is Figure 2 a sectional view in the A-A direction; Figure 4 is Figure 1 an exploded structural schematic diagram of the battery pack 100; Figure 5 The structure of the pressure relief mechanism 161 and the partition plate 120 is shown.

[0049] The embodiment of the present application provides a battery pack 100, the battery pack 100 comprises a box body 110, a partition plate 120 and a battery monomer 150A, the box body 110 defines a containing space 180, the partition plate 120 is arranged in the containing space 180 and separates the containing space 180 into a first chamber 130 and a second chamber 140, the battery monomer 150A is arranged in the first chamber 130, the battery monomer 150A comprises a first wall 160 and a pressure relief mechanism 161, the pressure relief mechanism 161 is arranged in the first wall 160, and the first wall 160 and the pressure relief mechanism 161 both face the partition plate 120, wherein the partition plate 120 comprises a first plate part 121, a blocking ring 122 and a second plate part 123, the first plate part 121 has a first through hole 121A, the first through hole 121A penetrates through the first plate part 121 along a first direction X, the second plate part 123 is fixedly installed in the first through hole 121A, the partition plate 120 fixedly connects the first plate part 121 and the second plate part 123, the second plate part 123 has a second through hole 123A, the second through hole 123A penetrates through the second plate part 123 and is oppositely arranged with the pressure relief mechanism 161 along the first direction X, and the blocking ring 122 is arranged between the hole wall of the first through hole 121A and the outer circumferential surface of the second plate part 123 to space the first plate part 121 and the second plate part 123 apart, and the blocking ring 122 is configured as an insulating piece.

[0050] The containing space 180 is arranged inside the box body 110, the partition plate 120 is arranged in the containing space 180, the partition plate 120 separates the containing space 180 into the first chamber 130 and the second chamber 140, that is to say, the first chamber 130 and the second chamber 140 jointly constitute the containing space 180. The battery monomer 150A is arranged in the first chamber 130, the battery monomer 150A comprises the first wall 160 and the pressure relief mechanism 161, the pressure relief mechanism 161 is arranged in the first wall 160, and the first wall 160 and the pressure relief mechanism 161 are both arranged in the first chamber 130. The first wall 160 and the pressure relief mechanism 161 both face the partition plate 120, that is to say, the first wall 160 and the pressure relief mechanism 161 both face the second chamber 140, when the battery monomer 150A overheats and heat runaway occurs, high-temperature substances inside the battery monomer 150A can be sprayed out from the pressure relief mechanism 161, and the high-temperature substances enter the inside of the second chamber 140.

[0051] The partition plate 120 comprises a first plate portion 121, a barrier ring 122 and a second plate portion 123, the first plate portion 121 is provided with a first through hole 121A, the first plate portion 121 is connected with the second plate portion 123 through the barrier ring 122, and it can be understood that the second plate portion 123 and the barrier ring 122 are arranged in the first through hole 121A. The second plate portion 123 is provided with a second through hole 123A, the second through hole 123A is actually arranged inside the first through hole 121A, the second through hole 123A penetrates the second plate portion 123 along the first direction, and the second through hole 123A is arranged opposite to the pressure relief mechanism 161, so that when the battery monomer 150A overheats and causes thermal runaway, the high-temperature substances inside the battery monomer 150A are sprayed out from the pressure relief mechanism 161, and the high-temperature substances enter the inside of the second cavity 140 through the second through hole 123A. The barrier ring 122 is arranged between the hole wall of the first through hole 121A and the outer circumferential surface of the second plate portion 123, the barrier ring 122 separates the first plate portion 121 and the second plate portion 123, and actually the first plate portion 121 and the second plate portion 123 are connected together through the barrier ring 122, and the first plate portion 121, the barrier ring 122 and the second plate portion 123 jointly constitute the partition plate 120.

[0052] Since the partition plate 120 is mostly made of metal material, the partition plate 120 has good electrical conductivity and heat conductivity, and the first plate portion 121 and the second plate portion 123 also have good electrical conductivity. The barrier ring 122 is arranged between the first plate portion 121 and the second plate portion 123, so that the first plate portion 121 and the second plate portion 123 are insulated from each other, and the current cannot flow from the first plate portion 121 to the second plate portion 123, and the current cannot flow from the second plate portion 123 to the first plate portion 121.

[0053] Specifically, the partition plate 120 is arranged in the containing space 180 and separates the containing space 180 into the first cavity 130 and the second cavity 140, so that the first cavity 130 and the second cavity 140 are separated, and harmful gas or electrolyte generated when the battery monomer 150A fails (such as thermal runaway, short circuit, etc.) can be prevented from directly contacting other parts of the battery box 110, thereby reducing the probability of fire or explosion. Moreover, the partition plate 120 can also serve as a barrier to prevent external objects or liquids from entering the first cavity 130 and damaging the battery monomer 150A, thereby reducing the probability of failure of the battery monomer 150A. The presence of the partition plate 120 can also increase the structural strength of the battery box 110, and when subjected to external impact or vibration, the battery monomer 150A can be better protected.

[0054] In some embodiments of the present application, the wall where the electrode terminal of the battery cell 150A is located can be oppositely arranged with the first wall 160. For example, the electrode terminal of the battery cell 150A can be arranged on the top wall, and the first wall 160 can be the bottom wall.

[0055] The battery cell 150A includes a first wall 160 and a pressure relief mechanism 161, both of which are directed towards the partition plate 120. The pressure relief mechanism 161 can provide a safe channel for releasing pressure when the pressure inside the battery cell 150A abnormally rises, thereby reducing the probability of explosion of the battery. The blocking ring 122 is arranged between the hole wall of the first through hole 121A and the outer circumferential surface of the second plate portion 123. When the battery cell 150A loses control and the high-temperature conductive substance is ejected from the pressure relief mechanism 161, the high-temperature conductive substance will come into contact with the second plate portion 123 due to the opposite arrangement of the pressure relief mechanism 161 and the second through hole 123A. The blocking ring 122 is arranged between the second plate portion 123 and the first plate portion 121, which can block the electrical connection between the first plate portion 121 and the second plate portion 123, ensure the insulation between the thermal runaway battery cell 150A and other normal battery cells 150A, and avoid the thermal runaway battery cell 150A connecting with other normal battery cells 150A through the discharged high-temperature and high-pressure substance and the partition plate 120, so as to cause short circuit, thereby improving the safety and reliability of the battery pack 100.

[0056] In some embodiments, the material of the insulating member can be silicon nitride, polyimide, polytetrafluoroethylene, and polyphenylene sulfide. Silicon nitride has extremely high high-temperature resistance, with a melting point as high as 1900℃, and can maintain stable insulation performance even under extreme high-temperature conditions, and also has excellent high-pressure resistance, corrosion resistance, and radiation resistance. Polyimide has excellent high-temperature resistance, with a long-term use temperature range of -200℃ to 300℃, and also has good mechanical properties, electrical properties, chemical resistance, and flame retardancy. Polytetrafluoroethylene has excellent high-temperature resistance, with a glass transition temperature as high as 143℃ and a melting point of 343℃, and also has good mechanical properties, chemical resistance, self-lubricating properties, and wear resistance. Polyphenylene sulfide has high mechanical strength, high-temperature resistance, and chemical resistance, and can maintain stable performance under high-temperature and harsh chemical environments.

[0057] Please refer to Figures 1 to 5 In the present embodiment, the first plate portion 121 and the second plate portion 123 are both configured as metal members.

[0058] The first plate portion 121 and the second plate portion 123 are metal pieces, which can have high strength and hardness, effectively resist external impact and vibration, and thus keep the battery monomer 150A inside the battery pack 100 from being damaged, and improve the strength and durability of the structure of the battery pack 100. In addition, the metal pieces have good heat conduction performance, and when the battery monomer 150A fails due to thermal runaway, etc., the first plate portion 121 and the second plate portion 123 can effectively conduct the heat generated by the battery monomer 150A away, reduce the temperature of the battery monomer 150A, and thus reduce the probability of failure of the good battery monomer 150A. It can be understood that the first plate portion 121 and the second plate portion 123 are metal pieces, which can also provide the battery pack 100 with electromagnetic shielding function, prevent the electromagnetic field generated by the battery monomer 150A from interfering with external equipment or personnel, and ensure the electromagnetic compatibility and electromagnetic interference protection of the battery pack 100. Since the metal piece has excellent corrosion resistance, the first plate portion 121 and the second plate portion 123 are metal pieces, which can also prolong the service life of the battery pack 100.

[0059] In some embodiments, the metal piece can be made of metal materials such as stainless steel, magnesium alloy, and aluminum alloy.

[0060] In some embodiments, an adhesive layer 170 can be further arranged between the partition plate 120 and the battery monomer 150A, and the first through hole 121A penetrates the adhesive layer 170, which can further reduce the probability of the high-temperature conductive material sprayed by the out-of-control battery monomer 150A damaging the good battery monomer 150A, and improve the use stability and reliability of the battery monomer 150A.

[0061] The adhesive layer 170 can adhere and fix the battery monomer 150A to the partition plate 120, and the adhesive layer 170 can also be configured as an insulating piece, thereby insulating and isolating the battery monomer 150A from the partition plate 120.

[0062] Please refer to Figures 1 to 5 In this embodiment, the structural strength of any one of the first plate portion 121 and the second plate portion 123 is greater than that of the blocking ring 122.

[0063] The structural strength of any one of the first plate portion 121 and the second plate portion 123 is greater than that of the blocking ring 122, which can avoid the high-pressure material sprayed by the thermal runaway battery monomer 150A from damaging the first plate portion 121 or the second plate portion 123, and improve the reliability of the battery pack 100.

[0064] Please refer to Figure 6 , Figure 6The structure of the barrier ring 122 of an embodiment of the present application is shown. In the embodiment, along the first direction X, the partition plate 120 has a first side 120A facing the first wall 160 and a second side 120B away from the first wall 160, and along the first direction X, the barrier ring 122 includes a barrier ring body 122A and a first limiting portion 122B, the barrier ring body 122A is arranged between the hole wall of the first through hole 121A and the outer circumferential surface of the second plate portion 123, and the first limiting portion 122B protrudes from the first side 120A and is in contact with the first wall 160.

[0065] The first side 120A faces the battery monomer 150A, the distance between the first side 120A and the battery monomer 150A is closer than the distance between the second side 120B and the battery monomer 150A, the first side 120A is arranged in the first cavity 130, and the second side 120B is arranged in the second cavity 140. The barrier ring 122 includes the barrier ring body 122A and the first limiting portion 122B, the barrier ring body 122A is arranged between the hole wall of the first through hole 121A and the outer circumferential surface of the second plate portion 123, that is, the barrier ring body 122A is arranged between the first plate portion 121 and the second plate portion 123, and it can be understood that the barrier ring body 122A is actually also located between the first side 120A and the second side 120B. The first limiting portion 122B protrudes from the first side 120A, the first limiting portion 122B can extend on the first side 120A so that the first limiting portion 122B is in abutment with the first side 120A, and the first limiting portion 122B protrudes from the first side 120A and is in contact with the first wall 160, so that the first limiting portion 122B can reduce the probability of the first wall 160 contacting the first plate portion 121 and the second plate portion 123, thereby reducing the probability of short circuit of the battery monomer 150A, and further reducing the probability of failure of the battery monomer 150A with good quality, and improving the stability and reliability of the use of the battery pack 100.

[0066] In some embodiments of the present application, since the first limiting portion 122B protrudes from the first side 120A and is in contact with the first wall 160, the first wall 160 is spaced apart from the first plate portion 121 and the second plate portion 123.

[0067] Please refer to Figure 6 In the embodiment, along the first direction X, the area of the orthographic projection of the first limiting portion 122B on the first wall 160 is greater than the area of the orthographic projection of the barrier ring body 122A on the first wall 160.

[0068] The first limiting portion 122B can fully abut against the first side surface 120A, and the blocking ring 122 is more firmly connected with the first plate portion 121 and the second plate portion 123, so that the probability of disconnection of the blocking ring 122 from the first plate portion 121 or the second plate portion 123 is reduced, the stability of the insulation between the first plate portion 121 and the second plate portion 123 is ensured, and the stability and reliability of the battery pack 100 are improved.

[0069] Please refer to Figure 6 In this embodiment, along the first direction X, the blocking ring 122 further comprises a second limiting portion 122C, the second limiting portion 122C and the first limiting portion 122B are respectively arranged at two ends of the blocking ring body 122A, and the second limiting portion 122C protrudes from the second side surface 120B.

[0070] The second limiting portion 122C can also protrude from the second side surface 120B, the second limiting portion 122C extends away from the second through hole 123A, and the second limiting portion 122C can abut against the second side surface 120B, so that the connection between the blocking ring 122 and the first plate portion 121 or the second plate portion 123 is more stable, the risk of connection failure is reduced, and the probability of failure of the battery pack 100 is reduced.

[0071] Please refer to Figure 6 In this embodiment, along the first direction X, the second limiting portion 122C has a larger area of the orthogonal projection on the first wall 160 than the blocking ring body 122A.

[0072] The second limiting portion 122C can fully abut against the second side surface 120B, and the blocking ring 122 is more firmly connected with the first plate portion 121 and the second plate portion 123, so that the probability of disconnection of the blocking ring 122 from the first plate portion 121 or the second plate portion 123 is reduced, the stability of the insulation between the first plate portion 121 and the second plate portion 123 is ensured, and the stability and reliability of the battery pack 100 are improved.

[0073] Please refer to Figures 1 to 5 In this embodiment, along the first direction X, the pressure relief mechanism 161 has an orthogonal projection on the second plate portion 123 falling into the second through hole 123A.

[0074] The thermal runaway battery cell 150A can spray the high-temperature conductive substance through the pressure relief mechanism 161, and then enter the inside of the second cavity 140 from the second through hole 123A. The pressure relief mechanism 161 can avoid the high-temperature and high-pressure substance discharged by the thermal runaway battery cell 150A from damaging the blocking ring 122, prevent affecting other normal battery cells 150A, and improve the safety of the battery pack 100.

[0075] Please refer to Figures 1 to 5 In this embodiment, along the first direction X, the orthographic projection of the blocking ring 122 on the first wall 160 surrounds the pressure relief mechanism 161, and the orthographic projection of the first through hole 121A on the first wall 160 covers the pressure relief mechanism 161.

[0076] The orthographic projection of the blocking ring 122 on the first wall 160 surrounds the pressure relief mechanism 161, and the orthographic projection of the first through hole 121A on the first wall 160 covers the pressure relief mechanism 161, which can avoid the high-temperature and high-pressure substance discharged by the thermal runaway battery cell 150A from damaging the blocking ring 122, prevent affecting other normal battery cells 150A, and improve the safety of the battery pack 100.

[0077] Please refer to Figures 1 to 5 In this embodiment, the battery pack 100 includes a plurality of battery cell groups 150, the plurality of battery cell groups 150 are arranged along a third direction Z, each battery cell group 150 includes a plurality of battery cells 150A arranged along a second direction Y, the first direction X, the third direction Z and the second direction Y are perpendicular to each other, the first through hole 121A, the blocking ring 122 and the second plate 123 are all a plurality of, the blocking ring 122 is arranged between the hole wall of the corresponding first through hole 121A and the outer circumferential surface of the corresponding second plate 123, along the first direction X, the pressure relief mechanism 161 of each battery cell 150A is arranged opposite to the second through hole 123A of the corresponding second plate 123.

[0078] The battery pack 100 includes a plurality of battery cell groups 150, each battery cell group 150 includes a plurality of battery cells 150A, the plurality of battery cell groups 150 are arranged along a third direction Z, the battery cells 150A in each battery cell group 150 are arranged along a second direction Y, the first direction X, the third direction Z and the second direction Y are perpendicular to each other, it can be understood that the arrangement shape of the battery cell group 150 is approximately rectangular, which can make full use of the internal space of the battery pack 100, improve the space utilization rate of the battery pack 100, and reduce the risk of short circuit between the battery cells 150A and the battery cells 150A through such reasonable arrangement.

[0079] The first through hole 121A, the barrier ring 122 and the second plate part 123 are all multiple, that is, each battery monomer 150A corresponds to a first through hole 121A, a barrier ring 122 and a second plate part 123, and the pressure relief mechanism 161 of each battery monomer 150A is arranged opposite to the second through hole 123A of the second plate part 123. In this way, when each battery monomer 150A fails due to thermal runaway, the high-temperature conductive material can be sprayed out through the pressure relief mechanism 161, then enter the second cavity 140 along the second through hole 123A, and then realize the discharge of the high-temperature and high-pressure material, ensure that the high-temperature and high-pressure material and the battery monomer 150A in the first cavity 130 are separated, ensure that other normal battery monomers 150A are not affected by the high-temperature and high-pressure material discharged by the thermal runaway battery monomer 150A, avoid the thermal runaway chain reaction to cause thermal diffusion, and effectively improve the safety of the battery pack 100.

[0080] The embodiment of the application also provides a battery pack 100.

[0081] The barrier ring 122 is arranged between the hole wall of the first through hole 121A and the outer circumferential surface of the second plate part 123. When the battery monomer 150A fails, the high-temperature and high-pressure material is sprayed out from the pressure relief mechanism 161. Since the pressure relief mechanism 161 is arranged opposite to the second through hole 123A, the high-temperature conductive material will contact the second plate part 123. The barrier ring 122 is arranged between the second plate part 123 and the first plate part 121, and can block the electrical connection between the first plate part 121 and the second plate part 123, ensure the insulation between the thermal runaway battery monomer 150A and other normal battery monomers 150, avoid the thermal runaway battery monomer 150A being connected to other normal battery monomers 150A through the discharged high-temperature and high-pressure material and the partition plate 122, cause short circuit due to electrical connection, and improve the safety of the battery pack 100.

[0082] It should be further understood that the terms "comprise", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0083] The various embodiments described in this specification are described using a numbering of embodiments approach: this means that each feature can be present in each embodiment, and the various features of the embodiments can be combined in any combination, unless the context clearly indicates otherwise. The descriptions and illustrations herein teach those skilled in the art the best way to make and use the application. Although the application has been described in detail with reference to certain embodiments, variations and modifications exist within the spirit and scope of the application as described and defined in the following claims.

[0084] The application described herein is not limited to the embodiments described above. It should be appreciated by persons skilled in the art that any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the application are included in the scope of the claims of the application.

[0085] Although the embodiments of the present application are described with reference to the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes should fall within the scope of the appended claims.

Claims

1. A battery pack (100), characterized in that: include: The box body (110) defines a receiving space (180); a partition plate (120) disposed in the accommodating space (180) and dividing the accommodating space (180) into a first chamber (130) and a second chamber (140); A battery cell (150A) is disposed in the first chamber (130), the battery cell (150A) comprising a first wall (160) and a pressure relief mechanism (161), the pressure relief mechanism (161) being disposed on the first wall (160), and both the first wall (160) and the pressure relief mechanism (161) facing the partition plate (120); The partition plate (120) includes a first plate portion (121), a blocking ring (122) and a second plate portion (123), wherein the first plate portion (121) has a first through hole (121A), and along a first direction (X), the first through hole (121A) passes through the first plate portion (121), and the second plate portion (123) is fixedly installed in the first through hole (121A). The partition plate (120) fixedly connects the first plate portion (121) and the second plate portion (123), and the second plate portion (123) has There is a second through hole (123A), along the first direction (X), the second through hole (123A) passes through the second plate portion (123) and is arranged opposite to the pressure relief mechanism (161), the blocking ring (122) is arranged between the hole wall of the first through hole (121A) and the outer peripheral surface of the second plate portion (123) to separate the first plate portion (121) and the second plate portion (123), the blocking ring (122) is constructed as an insulating part, and the first direction (X) is parallel to the thickness direction of the partition plate (120).

2. The battery pack (100) according to claim 1, characterized in that The first plate portion (121) and the second plate portion (123) are both constructed as metal parts.

3. The battery pack (100) according to claim 1, characterized in that Along the first direction (X), the partition plate (120) has a first side surface (120A) facing the first wall (160) and a second side surface (120B) away from the first wall (160); Along the first direction (X), the blocking ring (122) includes a blocking ring body (122A) and a first limiting portion (122B), the blocking ring body (122A) is arranged between the hole wall of the first through hole (121A) and the outer peripheral surface of the second plate portion (123), and the first limiting portion (122B) protrudes from the first side surface (120A) and contacts the first wall (160).

4. The battery pack (100) according to claim 3, characterized in that: Along the first direction (X), the orthographic projection area of ​​the first limiting portion (122B) on the first wall (160) is larger than the orthographic projection area of ​​the blocking ring body (122A) on the first wall (160).

5. The battery pack (100) according to claim 3, characterized in that: Along the first direction (X), the barrier ring (122) further includes a second limiting portion (122C), the second limiting portion (122C) and the first limiting portion (122B) are respectively arranged at two ends of the barrier ring body (122A), and the second limiting portion (122C) protrudes from the second side surface (120B).

6. The battery pack (100) according to claim 5, characterized in that: Along the first direction (X), the orthographic projection area of ​​the second limiting portion (122C) on the first wall (160) is larger than the orthographic projection area of ​​the blocking ring body (122A) on the first wall (160).

7. The battery pack (100) according to claim 1, characterized in that Along the first direction (X), the orthographic projection of the pressure relief mechanism (161) on the second plate portion (123) falls into the second through hole (123A).

8. The battery pack (100) according to claim 7, characterized in that: Along the first direction (X), the orthographic projection of the blocking ring (122) on the first wall (160) surrounds the pressure relief mechanism (161), and the orthographic projection of the first through hole (121A) on the first wall (160) covers the pressure relief mechanism (161).

9. The battery pack (100) according to claim 1, characterized in that: The battery pack (100) includes a plurality of battery cell groups (150), the plurality of battery cell groups (150) are arranged along a third direction (Z), each of the battery cell groups (150) includes a plurality of battery cells (150A) arranged along a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (Z) intersect in pairs; There are multiple first through holes (121A), multiple blocking rings (122) and multiple second plate portions (123); the blocking rings (122) are arranged between the hole wall of the corresponding first through hole (121A) and the outer peripheral surface of the corresponding second plate portion (123); along the first direction (X), the pressure relief mechanism (161) of each battery cell (150A) is arranged opposite to the second through hole (123A) of the corresponding second plate portion (123).

10. The battery pack (100) according to claim 1 or 2, characterized in that: The structural strength of either the first plate portion (121) or the second plate portion (123) is greater than the structural strength of the barrier ring (122).

11. An electrical device, characterized in that: A battery pack (100) comprising any one of claims 1 to 9.

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