Battery modules and electrical equipment

Abstract

This application discloses a battery module and electrical equipment. [Solution] The battery module comprises a plurality of battery cell units and a housing arranged along a first direction. Each battery cell unit includes a battery cell and a holder. The battery cell comprises an electrode assembly, a battery cell housing, and electrode terminals connected to the electrode assembly and extending out from the battery cell housing. The battery cell housing includes a main body, which includes a first wall and a second wall arranged along a second direction. The electrode assembly is provided within the main body. The holder includes a first portion, which covers at least a portion of the first wall. The housing includes a bottom wall, the first portion is connected to the bottom wall. The bottom wall, the first portion, and the battery cell units are arranged along a second direction, and in the first direction, the first portion is configured to be movable relative to the bottom wall. When the battery cell expands, the main body is configured to be movable relative to the bottom wall by the first portion, making movement easier, protecting the main body, and reducing the risk of damage to the main body that could affect the use of the battery module.

Description

Technical Field

[0001] This application relates to the field of energy storage technologies, and more particularly, to battery modules and electrical devices.

Background Art

[0002] Currently, batteries are usually used with battery cells fixed within a battery housing. When a battery cell expands, although a part of the expanded battery cell housing may be displaced, since the battery cell housing is fixed within the battery housing, there is a problem that the expansion of the battery cell is inhibited, affecting the safety of battery use.

Summary of the Invention

[0003] In view of the above problems, there is a need to provide a battery module and an electrical device in which a battery cell is movable relative to a housing and can protect the battery cell.

[0004] An embodiment of this application provides a battery module, which includes a plurality of battery cell units arranged along a first direction and a housing. Each battery cell unit includes a battery cell and a holder. The battery cell includes an electrode assembly, a battery cell housing, and electrode terminals connected to the electrode assembly and drawn out from the battery cell housing. The battery cell housing includes a main body portion. The main body portion includes a first wall and a second wall arranged along a second direction. The electrode assembly is provided within the main body portion. The holder includes a first portion. The first portion covers at least a part of the first wall. The housing includes a bottom wall. The first portion is connected to the bottom wall. The bottom wall, the first portion, and the battery cell unit are arranged along the second direction, and in the first direction, the first portion is configured to be movable relative to the bottom wall. When the battery cell expands, the main body portion is configured to be movable relative to the bottom wall by the first portion, and the first portion can reduce the friction between the main body portion and the bottom wall during the movement of the main body portion, so that the movement of the main body portion becomes easy, the main body portion is protected, and the risk that the main body portion is damaged and affects the use of the battery module can be reduced.

[0005] In one example of the present invention, in some embodiments, the first portion and the bottom wall are in contact and connected, so that the battery cell moves relative to the bottom wall by the first portion.

[0006] In some embodiments of the present invention, the battery cell housing includes a first sealing portion. The first sealing portion extends from the main body. The first sealing portion includes a first connection portion. The holder includes a second portion that covers at least a portion of the first connection portion. Electrode terminals protrude from the first connection portion and are protected by the second portion.

[0007] As an example of this application, in some embodiments, the first sealing portion is arranged opposite to the second in the second direction. The first 2 connection Department and the third connection part Includes. Second connection part via the first connection Third connection It is connected, and the holder is Second connection section The first side portion that covers and Third connection Including a second side portion that covers, Second connection section and Third connection To protect.

[0008] In some embodiments of the present invention, when viewed from a direction opposite to the third direction, in the first direction, the first side portion does not extend beyond the first portion, and a first gap is formed between adjacent first side portions. This reduces the force acting on the first side, and consequently reduces the force acting on the first sealing portion, which is advantageous for protecting the first sealing portion, and the first gap is also advantageous for heat dissipation of the battery cell.

[0009] In some embodiments of the present invention, when viewed from a direction opposite to the third direction, in the first direction, the second side portion does not extend beyond the first portion, and a second gap is formed between adjacent second side portions. This reduces the force acting on the second side, and consequently further reduces the force acting on the first sealing portion, which is more advantageous for protecting the first sealing portion, and the second gap is also advantageous for heat dissipation of the battery cell.

[0010] As an example of this application, in some embodiments, when viewed from the first direction, 3 In this direction, a part of the first connection is located between the main body and the second part, 2 In this direction, a portion of the first connection is located between the first side and the second side. By covering a portion of the first connection portion with the holder, protection of the first connection portion is enhanced, and by providing a portion of the first connection portion between the main body and the first portion, and between the first side and the second side, an expansion space can be provided in the first sealing portion. This is advantageous for releasing pressure, reduces the impact on the first connection portion due to pressure inside the battery cell, reduces the impact on the sealing performance of the first sealing portion, and is also advantageous for heat dissipation of the first sealing portion.

[0011] As an example of the present invention, in some embodiments, the first side portion and the bottom wall are in contact and connected, making it easier to move the first sealing portion and the main body together, which is advantageous for protecting the first sealing portion.

[0012] In some embodiments of this invention, a first position regulating portion and a second position regulating portion are provided on the bottom wall. The first and second position regulating portions are spaced apart along a third direction. The first portion is located between the first and second position regulating portions. The movement of the battery cell unit is guided by the first and second position regulating portions.

[0013] In some embodiments of the present invention, the housing includes a top wall. The bottom wall and the top wall are positioned opposite each other in a second direction. The holder includes two first parts, the two first parts being positioned opposite each other in a second direction. One of the two first parts is connected to the bottom wall and is configured to be movable relative to the bottom wall. The other of the two first parts covers at least a portion of the second wall and is connected to the top wall and is configured to be movable relative to the top wall. By providing first parts on both the first wall and the second wall, the first parts are configured to be movable not only relative to the bottom wall but also relative to the top wall, thereby facilitating movement of the battery cell unit relative to both the bottom wall and the top wall.

[0014] In some embodiments of this invention, the top wall is provided with a third position regulating section and a fourth position regulating section. The third and fourth position regulating sections are spaced apart along the third direction. The first portion connected to the top wall is located between the third and fourth position regulating sections. The third and fourth position regulating sections guide the movement of the battery cell unit.

[0015] As an example of the present invention, in some embodiments, the battery module further comprises a first elastic member. In a first direction, a plurality of battery cell units and the first elastic member are arranged in a sequence. The first elastic member is configured to provide an expansion space for the battery cells and the battery cell assembly is received pressure This can buffer the force and reduce the impact on the battery module's lifespan.

[0016] As an example of the present invention, in some embodiments, the first elastic member is configured to be able to apply pressure to the battery cell unit. In the first direction, the plurality of battery cell units are under pressure.

[0017] As an example of the present application, in some embodiments, the first elastic member includes a base portion and a bent portion. The base portion is connected to the bent portion. The bent portion is fixed to the housing. The base portion is configured to apply pressure to the battery cell unit, and the bent portion is configured to provide an expansion space for the battery cell unit.

[0018] As an example of the present application, in some embodiments, the bent portion includes a first bent portion and a second bent portion. The first bent portion and the second bent portion are arranged opposite to each other in the second direction. The first bent portion and the second bent portion are arranged opposite to each other in the second direction. The first bent portion and the second bent portion can provide an expansion space for the battery cell unit.

[0019] As an example of the present application, in some embodiments, the first elastic member includes a first connection segment. The first connection segment is connected to a side away from the base of the first bent portion. The first connection segment is fixed to the housing and can transmit the acting force received by the bent portion to the housing.

[0020] As an example of the present application, in some embodiments, the first bent portion includes a first bent segment and a second bent segment. The first bent segment connects the base portion and the second bent segment. The second bent segment is connected to the first connection segment.

[0021] As an example of the present application, in some embodiments, the first connection segment is parallel to the base portion, First which is advantageous for the deformation of the elastic member in the first direction.

[0022] As an example of the present application, in some embodiments, the first bent segment and the base portion form a first angle A1, and the second bent segment and the first connection segment form a second angle B1, and A1≧B1. Thereby, the resistance of the first bent segment to deformation is enhanced, which is advantageous for reducing the risk of deformation of the first elastic member in the first direction.

[0023] As an example of the present application, in some embodiments, the first bending segment and the second bending segment form a third angle C1, and C1 > A1. This is advantageous for improving the uniform deformation of the first bending portion.

[0024] As an example of the present application, in some embodiments, C1 = 2A1 = 2B1. This is advantageous for improving the uniform deformation of the first bending portion.

[0025] As an example of the present application, in some embodiments, the housing includes a first side wall. A first fixing portion is provided on the first side wall. In the first direction, the projection of the first connection segment and the projection of the first fixing portion overlap. The first connection segment is fixed to the first fixing portion and can transmit the acting force received by the bending portion to the first side wall.

[0026] As an example of the present application, in some embodiments, since the structural strength of the first side wall is greater than the structural strength of the first elastic member, the risk of deformation of the first side wall caused by the acting force received by the first bending portion can be reduced.

[0027] As an example of the present application, in some embodiments, the first elastic member includes a second connection segment. The second connection segment is connected to the side away from the base of the second bending portion. The second connection segment is fixed to the housing and can transmit the acting force received by the bending portion to the housing.

[0028] [[ID=2\3]] As an example of the present application, in some embodiments, the second connection segment is parallel to the base, which is advantageous for the deformation of the first elastic member in the first direction.

[0029] As an example of the present application, in some embodiments, a third fixing portion is provided on the bottom wall. The projection of the second connection segment and the projection of the third fixing portion overlap in the first direction. The second connection segment is fixed to the third fixing portion and can transmit the acting force received by the bending portion to the bottom wall.

[0030] As an example of this application, in some embodiments, the structure of the first bent portion and the second bent portion are identical, which is advantageous for uniform force bearing and uniform deformation.

[0031] As an example of the present invention, in some embodiments, a third gap exists between the first wall and the bottom wall in the second direction, making it easier for the first portion to move relative to the bottom wall.

[0032] As an example of the present invention, in some embodiments, the battery module further comprises a filling member provided at a third interval, which can protect the portion of the first wall that is not provided.

[0033] As an example of the present invention, in some embodiments, a fourth gap exists between the top wall and the second wall, and the filling member is provided in the fourth gap to protect the portion of the second wall that is not provided in the first portion.

[0034] As an example of this invention, in some embodiments, the main bodies of adjacent battery cell housings are in contact and connected, making it easier to apply pressure to each other.

[0035] In some embodiments of this application, the battery cell housing includes a third wall and a fourth wall. The third wall and the fourth wall are positioned opposite each other in a first direction. When viewed from a direction opposite to the third direction, in the first direction, the first portion does not extend beyond the third wall, and the first portion does not extend beyond the fourth wall. When the bodies of adjacent battery cells apply pressure to each other, the force applied to the holder can be reduced, and the connection strength between the holder and the battery cells can be increased.

[0036] In some embodiments of the present invention, the electrode assembly is a wound structure and includes a first straight segment, a second straight segment, a first curved segment, and a second curved segment. The first straight segment connects the first curved segment and the second curved segment, and the second straight segment connects the first curved segment and the second curved segment. In the first direction, the projection of the third wall covers the projection of the first straight segment, and the projection of the fourth wall covers the projection of the second straight segment. This is advantageous for applying uniform pressure between the battery cells and can further extend the service life of the battery cells.

[0037] As an example of this application, in some embodiments, in the first direction, the projection of the first portion and the projection of the first curved segment overlap, the projection of the first portion and the projection of the first straight segment are separated, and the projection of the first portion and the projection of the second straight segment are separated. This is advantageous for applying uniform pressure between battery cells and can further extend the service life of the battery cells.

[0038] As an example of this invention, in some embodiments, the holder is integrally molded with the battery cell, which can increase the connection strength between the holder and the battery cell.

[0039] As an example of this invention, in some embodiments, the holder is an insulating holder, which can reduce the risk of short-circuiting between the holder and the battery cell.

[0040] As an example of this application, in some embodiments, the battery cell includes a rectangular battery cell.

[0041] As an example of this application, in some embodiments, when viewed from a direction opposite to the third direction, the second portion is located between the third wall and the fourth wall in the first direction. When the main bodies of adjacent battery cells exert pressure on each other, the force applied to the first sealing portion can be reduced, thereby enhancing the protection of the first sealing portion.

[0042] As an example of the present invention, in some embodiments, when viewed from a direction opposite to the third direction, the first side is located between the third wall and the fourth wall in the first direction. When the bodies of adjacent battery cells exert pressure on each other, the force applied to the first seal can be reduced, and the protection of the first seal can be enhanced.

[0043] In one example of the present invention, in some embodiments, when viewed from a direction opposite to the third direction, the second side is located between the third wall and the fourth wall in the first direction. When the bodies of adjacent battery cells exert pressure on each other, the force applied to the first seal can be reduced, thereby enhancing the protection of the first seal.

[0044] As an example of the present invention, in some embodiments, a sliding member is provided on the side of the first portion that contacts the bottom wall, and the sliding member reduces the contact area between the first portion and the bottom wall, making it easier for the first portion to move relative to the bottom wall.

[0045] In one example of the present invention, in some embodiments, the first portion is connected to both ends of the first wall in a third direction, making it easier for the battery cell unit to move relative to the bottom wall.

[0046] As an example of the present invention, in some embodiments, in a third direction, the first portion can cover the entire first wall, thereby enhancing the protection of the first wall by the first portion.

[0047] As an example of the present invention, in some embodiments, the first portion can cover a portion of the first wall and a portion of the second sealing portion, thereby protecting the first wall and the second sealing portion.

[0048] In some embodiments of this application, the first portion can cover a portion of the second wall and a portion of the second sealing portion, thereby protecting the second wall and the second sealing portion.

[0049] As an example of the present invention, in some embodiments, a second elastic member is provided between a first elastic member and a battery cell, and when the battery cell expands, the second elastic member is compressed, providing the battery cell with further expansion space and allowing further pressure to be applied to the battery cell.

[0050] As an example of the present invention, in some embodiments, a third elastic member is provided between the rear wall and the battery cell, and when the battery cell expands, the third elastic member is compressed, providing the battery cell with further expansion space and allowing further pressure to be applied to the battery cell.

[0051] One embodiment of the present application further provides an electrical device comprising the battery module described in any of the above embodiments.

[0052] In the above-mentioned battery module and electrical equipment, the main body is configured to be movable relative to the bottom wall by the first part, and the friction between the main body and the bottom wall during movement can be reduced by the first part, making movement easier, protecting the main body, and reducing the risk of damage to the main body that may affect the use of the battery module. [Brief explanation of the drawing]

[0053] [Figure 1] This is a schematic diagram of the structure of a battery module according to several embodiments. [Figure 2] This is a schematic diagram of an exploded view of a battery module according to several embodiments. [Figure 3] This is a schematic diagram of the structure of a battery cell and holder according to several embodiments. [Figure 4] This is a schematic diagram of a part of the structure of a battery module according to several embodiments. [Figure 5] This is a schematic diagram of the structure of a battery cell unit according to several embodiments. [Figure 6] This is a partially enlarged schematic diagram of a battery cell unit according to several embodiments. [Figure 7] This is a cross-sectional view of the battery module shown in Figure 1, along the line II-II. [Figure 8] This is a schematic diagram of the structure of a battery cell according to several embodiments. [Figure 9] This is a schematic diagram of the battery cell structure as observed from the direction Z' opposite to the third direction Z in some embodiments. [Figure 10] This is a schematic diagram of an exploded view of a battery cell according to several embodiments. [Figure 11] This is a schematic diagram of the structure of a battery cell according to several other embodiments. [Figure 12] Furthermore, these are schematic diagrams of the battery cell structure as observed from the direction Z' opposite to the third direction Z in several other embodiments. [Figure 13] This is a schematic diagram of the structure of a rectangular battery cell according to several embodiments. [Figure 14] This is a schematic diagram of the structure of an electrode assembly according to several embodiments. [Figure 15] This is a schematic diagram of the structure of a battery cell and holder according to several embodiments. [Figure 16] These are schematic diagrams of the structure of a battery cell and holder from another viewpoint according to several embodiments. [Figure 17] This is a schematic diagram of the structure of a battery cell unit as observed from the direction Z' opposite to the third direction Z in some embodiments. [Figure 18] Figure 15 is a cross-sectional view of the battery cell unit along the IV-IV line. [Figure 19] This is a partially enlarged schematic diagram of a battery cell and holder according to several embodiments. [Figure 20] This is a magnified schematic diagram of another part of a battery cell and holder according to several embodiments. [Figure 21] This is a schematic diagram of the structure of the ceiling wall according to several embodiments. [Figure 22] This is a schematic diagram of the structure of a housing according to several embodiments. [Figure 23] This is a schematic diagram of the structure of a first elastic member according to several embodiments. [Figure 24]This is a cross-sectional view of the battery module shown in Figure 1, along the line II-II. [Figure 25] This is a cross-sectional view of a battery module according to several other embodiments, along line III-III. [Figure 26] This is a schematic diagram of electrical equipment according to several embodiments. [Modes for carrying out the invention]

[0054] The present invention will now be described in detail with reference to the attached drawings, with regard to specific embodiments.

[0055] The following specific embodiments are illustrative and not limiting. They are intended to provide a basic understanding of this application and are not intended to identify any important or definitive elements of this application or to limit the scope of protection. Unless there is a structural conflict, the technical features proposed in each embodiment can be combined in any way.

[0056] When an element is said to be "installed" or "provided" on another element, that element may be directly installed or provided on top of the other element, or there may be an intervening element between them. When an element is said to be "connected" to another element, that element may be directly connected on top of the other element, or there may be an intervening element between them.

[0057] The terms "perpendicular" and "equal" describe an ideal state between two parts. In actual manufacturing or use, the relationship between two parts may be close to perpendicular or equal. For example, based on numerical descriptions, "perpendicular" means that the angle range between two straight lines is 90° ± 10°. It also means that the angle range between two planes is 90° ± 10°. Furthermore, it means that the angle range between a line and a plane is 90° ± 10°. Two parts described as "perpendicular" may not be absolute straight lines or planes, but approximately straight lines or planes. Macroscopically, a part is considered "straight" or "plane" if its overall direction of extension is a straight line or plane.

[0058] The term "parallel" describes the ideal state between two parts. In actual manufacturing or use, the two parts may be close to parallel. For example, based on a numerical description, "parallel" means that the angle range between two straight lines is 180° ± 10°. It also means that the angle range between two planes is 180° ± 10°. Furthermore, it means that the angle range between a straight line and a plane is 180° ± 10°. Two parts described as "parallel" may not be absolute straight lines or planes, but nearly straight lines or planes. Macroscopically, parts are considered "straight" or "plane" if their overall direction of extension is straight or plane.

[0059] Unless otherwise defined, the term “plural” in this specification, when used to describe the number of parts, specifically means two or more of those parts.

[0060] In the first direction X, this includes the first direction X and the direction opposite to the first direction X; in the second direction Y, this includes the second direction Y and the direction opposite to the second direction Y; and in the third direction Z, this includes the third direction Z and the direction opposite to the third direction Z.

[0061] For the sake of explanation, some of the electrode terminals 11c are not bent.

[0062] As shown in Figures 1 to 8, one embodiment of the present invention provides a battery module 100 comprising a plurality of battery cell units 10 and a housing 20. The plurality of battery cell units 10 are arranged along a first direction X, and each battery cell unit 10 includes a battery cell 11 and a holder 12, the holder 12 being connected to the battery cell 11. The battery cell 11 comprises a battery cell housing 11a, an electrode assembly 11b, and electrode terminals 11c connected to the electrode assembly 11b and extending out from the battery cell housing 11a. The battery cell housing 11a includes a main body 111, and the electrode assembly 11b is provided within the main body 111. The main body 111 includes a first wall 111a and a second wall 111b arranged along a second direction Y. The holder 12 includes a first portion 121, the first portion 121 covering at least a portion of the first wall 111a. The housing 20 includes a bottom wall 21, and the bottom wall 21, the first portion 121, and the battery cell unit 10 are arranged along a second direction Y. The first portion 121 is connected to the bottom wall 21. The first portion 121 is configured to be movable relative to the bottom wall 21 along a first direction X. When the battery cell 11 expands, the main body 111 is configured to be movable relative to the bottom wall 21 by the first portion 121, and the friction between the main body 111 and the bottom wall 21 during movement is reduced by the first portion 121, thus making movement easier, protecting the main body 111, and reducing the risk of damage to the main body 111 that could affect the use of the battery module 100.

[0063] In one embodiment, the holder 12 is integrally molded with the battery cell 11, thereby increasing the connection strength between the holder 12 and the battery cell 11. As an example of the present invention, the holder 12 is integrally molded with the battery cell 11 by low-pressure injection molding.

[0064] In one embodiment, the holder 12 is an insulating holder, which reduces the risk of a short circuit between the holder 12 and the battery cell 11.

[0065] As shown in Figures 8 to 11, in one embodiment, the battery cell 11 includes a pouch-encased battery cell. The main body 111 is provided with a housing space, and the main body 111 includes a first case 1111 and a second case 1112. The first case 1111 is provided with a first recess 1111a, and the second case 1112 is provided with a second recess 1112a. The first case 1111 is connected to the second case 1112, forming the housing space. Part of the electrode assembly 11b is provided in the first recess 1111a, and the other part is provided in the second recess 1112a. The circumferential side of the first case 1111 extends outward to form a first extended edge 1113, and the circumferential side of the second case 1112 extends outward to form a second extended edge 1114. After the first case 1111 is connected to the second case 1112, the first extension edge 1113 and the second extension edge 1114 overlap and seal together, forming two first sealing portions 112 and two second sealing portions 113. The two first sealing portions 112 are provided along the third direction Z, and the two second sealing portions 113 are provided along the second direction Y. One of the two first sealing portions 112 is connected to the two second sealing portions 113, and the other first sealing portion 112 is connected to the two second sealing portions 113.

[0066] In one embodiment, the first extended edge 1113 and the second extended edge 1114 overlap and are sealed together to form one first sealing portion 112 and two second sealing portions 113. The two second sealing portions 113 are provided along the second direction Y, and the first sealing portion 112 is connected to the two second sealing portions 113.

[0067] As shown in Figures 8 and 9, in one embodiment, the main body 111 further includes a third wall 111c and a fourth wall 111d. The third wall 111c and the fourth wall 111d are arranged opposite each other in the first direction X. One of the two second sealing parts 113 The second sealing portion 113 is connected to the first wall 111a, and the other second sealing portion 113 is connected to the second wall 111b.

[0068] As shown in Figures 8 and 9, in one embodiment, the main body 111 further includes a fifth wall 111e and a sixth wall 111f, the sixth wall 111f and the fifth wall 111e are provided along the third direction Z. One of the two first sealing portions 112 One first sealing portion 112 is connected to a fifth wall 111e, and the other first sealing portion 112 is connected to a sixth wall 111f, with the third direction Z being perpendicular to both the first direction X and the second direction Y. The fifth wall 111e connects the third wall 111c to one of the first sealing portions 112, and the sixth wall 111f connects the third wall 111c to the other first sealing portion 112.

[0069] As shown in Figure 8, in one embodiment, the battery cell 11 has two electrode terminals 11c, and one of the two electrode terminals 11c is One of the two first sealing portions 112 The first sealing portion 112 extends to the outside of the battery cell housing 11a, and the other electrode terminal 11c extends to the outside of the battery cell housing 11a from the other first sealing portion 112.

[0070] As shown in Figures 11 and 12, in one embodiment, the battery cell 11 comprises two electrode terminals 11c, the two electrode terminals 11c extending from the same first sealing portion 112 to the outside of the battery cell housing 11a.

[0071] As shown in Figure 12, in one embodiment, the main body 111 is provided with a housing space, and the main body 111 includes a first case 1111 and a second case 1112, the first case 1111 is provided with a first recess 1111a, and the second case 1112 is flat. The first case 1111 is connected to the second case 1112 and forms the housing space. The electrode assembly 11b is provided in the first recess 1111a.

[0072] In one embodiment, the main body 111 includes two fifth walls 111e, a sixth wall 111f, and a first sealing portion 112. The main body 111 is provided with a housing space, and the main body 111 includes a first case 1111 and a second case 1112, the first case 1111 being connected to the second case 1112, the first case 1111 being provided with a first recess 1111a, and the second case 1112 being provided with a second recess 1112a, forming the housing space. The electrode assembly 11b is provided within the first recess 1111a and the second recess 1112a. Two electrode terminals 11c extend from the same first sealing portion 112 to the outside of the battery cell housing 11a.

[0073] As an example of this application, there is one sixth wall 111f and one first sealing portion 112. One of the two fifth walls 111e connects the third wall 111c to the first sealing portion 112, and the other fifth wall 111e connects the fourth wall 111d to the first sealing portion 112. Viewed from direction Z' opposite to the third direction Z, the two fifth walls 111e are located on opposite sides of the first sealing portion 112 in the first direction X. Along the first direction X, including the first direction X and the direction opposite to the first direction X.

[0074] As an example of this invention, there are two sixth walls 111f and two first sealing portions 112. One of the two fifth walls 111e is connected to the third wall 111c. One of the two first sealing portions 112 The first sealing portion 112 is connected to the fifth wall 111e, and the other fifth wall 111e is connected to the fourth wall 111d. The other It connects to the first sealing portion 112. Viewed from the direction Z' opposite to the third direction Z, in the first direction X, the two fifth walls 111e are connected to opposite sides of the one first sealing portion 112. One of the two sixth walls 111f connects the third wall 111c to the other first sealing portion 112, and the other sixth wall 111f connects the fourth wall 111d to the other first sealing portion 112. Viewed from the third direction Z, in the first direction X, the two sixth walls 111f are located on opposite sides of the other first sealing portion 112.

[0075] As shown in Figures 8 and 9, in one embodiment, the main body 111 includes two fifth walls 111e, two sixth walls 111f, and two first sealing parts 112. One of the two fifth walls 111e connects the third wall 111c to one of the two first sealing parts 112, and the other fifth wall 111e connects the fourth wall 111d to the first sealing part 112. One of the two sixth walls 111f connects the third wall 111c to the other first sealing part 112, and the other sixth wall 111f connects the fourth wall 111d to The other party It connects to the first sealing portion 112. One of the two electrode terminals 11c extends from one of the two first sealing portions 112 to the outside of the battery cell housing 11a, and the other electrode terminal 11c extends from the other first sealing portion 112 to the outside of the battery cell housing 11a.

[0076] Viewed from the direction Z' opposite to the third direction Z, the two fifth walls 111e are located on opposite sides of the first sealing portion 112 in the first direction X. Viewed from the direction Z' opposite to the third direction Z, in the first direction X, the two sixth walls 111f are The other first sealing portion 112 It is located on both opposing sides.

[0077] In one embodiment, the main body 111 includes one fifth wall 111, one sixth wall 111f, and two first sealing portions 112. The fifth wall 111e is connected to the third wall 111c. One of the two first sealing portions 112 The sixth wall 111f is connected to the first sealing portion 112 and the third wall 111c The otherIt connects to the first sealing portion 112. The main body 111 is provided with a housing space, and the main body 111 includes a first case 1111 and a second case 1112. The first case 1111 is provided with a first recess 1111a, and the second case 1112 is flat. The first case 1111 is connected to the second case 1112 and forms a housing space. The electrode assembly 11b is provided in the first recess 1111a. One of the two electrode terminals 11c extends from one of the two first sealing portions 112 to the outside of the battery cell housing 11a, and the other electrode terminal 11c extends from the other first sealing portion 112 to the outside of the battery cell housing 11a.

[0078] As shown in Figure 12, in one embodiment, the main body 111 includes one fifth wall 111e, one sixth wall 111f, and a first sealing portion 112. The main body 111 is provided with a housing space and includes a first case 1111 and a second case 1112. The first case 1111 is provided with a first recess 1111a, and the second case 1112 is flat. The first case 1111 is connected to the second case 1112, forming the housing space. The electrode assembly 11b is provided in the first recess 1111a. Two electrode terminals 11c extend from the same first sealing portion 112 to the outside of the battery cell housing 11a. Alternatively, there may be only one first sealing portion 112. The fifth wall 111e connects the third wall 111c and the first sealing section 112, and the sixth wall 111f is connected to the third wall 111c. When there are two first sealing sections 112, the fifth wall 111e connects to the third wall 111c and One of the two first sealing portions 112 The sixth wall 111f connects the third wall 111c to the other first sealing part 112, and the sixth wall 111f connects the third wall 111c to the other first sealing part 112.

[0079] As shown in Figures 10, 14 to 18, in one embodiment, the electrode assembly 11b has a wound structure and includes a first straight segment 1116, a second straight segment 1117, a first curved segment 1118, and a second curved segment 1119. The first straight segment 1116 connects the first curved segment 1118 and the second curved segment 1119, and the second straight segment 1117 connects the first curved segment 1118 and the second curved segment 1119. Along the first direction X, the projection of the third wall 111c covers the projection of the first linear segment 1116, the projection of the fourth wall 111d covers the projection of the first linear segment 1116, the projection of the third wall 111c covers the projection of the second linear segment 1117, and the projection of the fourth wall 111d covers the projection of the second linear segment 1117. This is advantageous for applying uniform pressure between the battery cells 11, and can further extend the service life of the battery cells 11.

[0080] In one embodiment, along a first direction X, the projection of the first portion 121 and the projection of the first curved segment 1118 overlap, the projection of the first portion 121 and the projection of the first straight segment 1116 are separated, and the projection of the first portion 121 and the projection of the second straight segment 1117 are separated. The first portion 121 can protect the first curved segment 1118, is advantageous for applying uniform pressure between the battery cells 11, and can further extend the service life of the battery cells 11.

[0081] In one embodiment, the holder includes two first portions, the projection of the other first portion 121 overlaps with the projection of the second curved segment 1119, the projection of the first portion 121 is spaced apart from the projection of the first straight segment 1116, and the projection of the first portion 121 is spaced apart from the projection of the second straight segment 1117. The first portion 121 can protect the second curved segment 1119, is advantageous for applying uniform pressure between the battery cells 11, and can further extend the service life of the battery cells 11.

[0082] In one embodiment, when viewed from a direction Z' opposite to the third direction Z, along the first direction X, the first portion 121 does not extend beyond the third wall 111c, and the first portion 121 does not extend beyond the fourth wall 111d. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force applied to the holder 12 can be reduced, and the connection strength between the holder 12 and the battery cells 11 can be increased.

[0083] As shown in Figures 8 and 15-20, in one embodiment, the first sealing portion 112 extends from the main body portion 111. The first sealing portion 112 includes a first connecting portion 112a, and the electrode terminal 11c extends from the first connecting portion 112a to the outside of the battery cell housing 11a. The holder 12 covers at least a portion of the first connecting portion 112a and protects the first connecting portion 112a.

[0084] In one embodiment, the holder 12 includes a second portion 122, the second portion 122 covering a portion of the first connector 112a, and the electrode terminal 11c protruding from the second portion 122 and protecting a portion of the first connector 112a.

[0085] In one embodiment, when viewed from a direction Z' opposite to the third direction Z, the second portion 122 is located between the third wall 111c and the fourth wall 111d along the first direction X. When the body portions 111 of adjacent battery cells 11 apply pressure to each other, the force applied to the first seal portion 112 can be reduced, thereby enhancing the protection of the first seal portion 112.

[0086] In one embodiment, the first sealing portion 112 includes a second connecting portion 112b and a third connecting portion 112c, the second connecting portion 112b and the third connecting portion 112c being arranged opposite each other in the second direction Y. The second connecting portion 112b is connected to the third connecting portion 112c via the first connecting portion 112a.

[0087] In one embodiment, the holder 12 includes a first side portion 123 and a second side portion 124, with one end of the second portion 122 connected to the first side portion 123 and the other end connected to the second side portion 124, thereby increasing the structural strength of the holder 12. The first side portion 123 covers the second connection portion 112b, and the second side portion 124 covers the third connection portion 112c, thereby protecting the first sealing portion 112.

[0088] In one embodiment, the first side portion 123 is advantageous in covering the connection point between the first connecting portion 112a and the second connecting portion 112b, thereby enhancing the protection of the first sealing portion 112.

[0089] In one embodiment, the second side portion 124 is advantageous in covering the connection point between the first connecting portion 112a and the third connecting portion 112c, thereby enhancing the protection of the first sealing portion 112.

[0090] In one embodiment, since the first side portion 123 and the bottom wall 21 are in contact and connected, the first sealing portion 112 and the main body portion 111 can be moved together, which is advantageous for protecting the first sealing portion 112.

[0091] In one embodiment, when viewed from a direction Z' opposite to the third direction Z, the first side portion 123 is located between the third wall 111c and the fourth wall 111d in the first direction X. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force applied to the first sealing portion 112 can be reduced, thereby enhancing the protection of the first sealing portion 112.

[0092] In one embodiment, when viewed from a direction Z' opposite to the third direction Z, the second side portion 124 is located between the third wall 111c and the fourth wall 111d in the first direction X. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force applied to the first sealing portion 112 can be reduced, thereby enhancing the protection of the first sealing portion 112.

[0093] In one embodiment, in the third direction Z, the projection of the first side portion 123 and the projection of the first curved segment 1118 overlap, the projection of the first side portion 123 and the projection of the first straight segment 1116 are separated, and the projection of the first side portion 123 and the projection of the second straight segment 1117 are separated. This is advantageous for releasing the pressure in the battery cell 11.

[0094] In one embodiment, in the third direction Z, the projection of the second side portion 124 and the projection of the second curved segment 1119 overlap, the projection of the second side portion 124 and the projection of the first straight segment 1116 are separated, and the projection of the second side portion 124 and the projection of the second straight segment 1117 are separated. This is advantageous for releasing the pressure in the battery cell 11.

[0095] As shown in Figures 3 to 6 and Figure 18, in one embodiment, when viewed from the direction Z' opposite to the third direction Z, in the first direction X, the first side portion 123 does not exceed the first portion 121, and a first gap 123a is formed between adjacent first side portions 123. Because adjacent battery cell housings 11a are in contact and connected, the force acting on the first side portion 123 when pressure is applied to each other can be reduced, and consequently, the force acting on the first sealing portion 112 can be reduced, which is advantageous for protecting the first sealing portion 112, and the first gap 123a is also advantageous for heat dissipation of the battery cell 11.

[0096] As shown in Figures 3 to 6 and Figure 18, in one embodiment, when viewed from the direction Z' opposite to the third direction Z, in the first direction X, the second side portion 124 does not exceed the first portion 121, and a second gap 124a is formed between adjacent second side portions 124. Because adjacent battery cell housings 11a are in contact and connected, the force acting on the second side portion 124 when pressure is applied to each other can be reduced, and consequently, the force acting on the first sealing portion 112 can be reduced, which is advantageous for protecting the first sealing portion 112, and the second gap 124a is also advantageous for heat dissipation of the battery cell 11.

[0097] As shown in Figure 16, in one embodiment, when viewed from a first direction X, a portion of the first connection portion 112a is located between the main body portion 111 and the second portion 122 along the third direction Z, and a portion of the first connection portion 112a is located between the first side portion 123 and the second side portion 124 along the second direction Y. Covering a portion of the first connection portion 112a with the holder 12 enhances the protection of the first connection portion 112a, and providing a portion of the first connection portion 112a between the main body portion 111 and the first portion 121, and between the first side portion 123 and the second side portion 124 provides an expansion space for the first sealing portion 112, which is advantageous for releasing pressure, reduces the impact on the first connection portion 112a due to the pressure inside the battery cell 11, reduces the impact on the sealing performance of the first sealing portion 112, and is also advantageous for heat dissipation of the first sealing portion 112.

[0098] As shown in Figures 8 and 15-18, in one embodiment, the holder 12 includes a fourth connector 125, which covers a portion of the fifth wall 111e. One end of the fourth connector 125 is connected to the first side 123, and the other end is connected to the second side 124, which can further increase the structural strength of the holder 12. Viewed from the direction Z' opposite to the third direction Z, in the first direction X, the fourth connector 125 does not extend beyond the third wall 111c, and the fourth connector 125 does not extend beyond the fourth wall 111d. Since the body portions 111 of adjacent battery cells 11 are connected in contact, the force applied to the first seal portion 112 when adjacent battery cells 11 apply pressure to each other by their body portions 111 can be reduced, thereby enhancing the protection of the first seal portion 112.

[0099] In some embodiments, the main body 111 includes a plurality of fifth walls 111e, and the holder 12 includes a corresponding plurality of fourth connectors 125. In one example of the present invention, several fifth walls 111e are provided with a fourth connector 125. In one example of the present invention, each fifth wall 111e is provided with one fourth connector 125.

[0100] In one embodiment, the holder 12 includes a third portion 126, which is connected to the side of the fourth connector 125 toward the second portion 122. The third portion 126 extends from the fourth connector 125 along a third direction Z, and covers a portion of the first seal 112. The third portion 126 can support and protect the connection between the first seal 112 and the fourth connector 125, reducing the risk of damage to the first seal 112 affecting the sealing performance of the battery cell 11.

[0101] In some embodiments, the main body 111 includes a plurality of fifth walls 111e, and the holder 12 includes a plurality of third portions 126 and a plurality of fourth connectors 125. In one example of the present application, several third portions 126 are connected to a fourth connector 125. In one example of the present application, each third portion 126 is connected to one fourth connector 125.

[0102] In one embodiment, along a first direction X, the holder 12 includes a first protrusion 1211 and a third recess 1212, the third recess 1212 being located in the first portion 121, and the first protrusion 1211 extending from the first portion 121. When the body portions 111 of adjacent battery cells 11 are in contact and connected, the first protrusion 1211 is located within the third recess 1212 of the adjacent holder 12, and a gap exists between the first protrusion 1211 and the third recess 1212. The third recess 1212 and the first protrusion 1211 position the adjacent holder 12, reducing misalignment of adjacent body portions 111 and facilitating the application of pressure between multiple body portions 111. Furthermore, the gap between the first protrusion 1211 and the third recess 1212 reduces the force applied to the holder 12, thereby enhancing the protection of the first sealing portion 112 and increasing the connection strength between the holder 12 and the battery cell 11. As shown in Figures 8 and 15 to 20, in one embodiment, the battery cell unit 10 includes two holders 12, one of which is connected to a portion of one of the two first sealing portions 112, and the other holder 12 is connected to a portion of the other first sealing portion 112. One of the two electrode terminals 11c protrudes from the first sealing portion 112 and the holder 12 along a third direction Z, and the other electrode terminal 11c protrudes from the second sealing portion 113 and the holder 12 along a direction Z' opposite to the third direction Z.

[0103] As shown in Figure 13, in one embodiment, the battery cell 11 includes a rectangular battery cell. The rectangular battery cell includes a rigid housing, and the holder 12 is connected to the rigid housing. The rectangular battery cell is configured to be movable relative to the bottom wall 21 by a first portion 121.

[0104] As shown in Figures 2, 7, 15, and 19-22, in one embodiment, the first portion 121 is connected to the bottom wall 21 via a small amount of adhesive (not shown), making it easy to temporarily position the battery cell unit 10 when installing it inside the housing 20. In this application, the adhesive includes an adhesive.

[0105] In one embodiment, the first portion 121 and the bottom wall 21 are in contact and connected, so the first portion 121 is configured to be directly movable relative to the bottom wall 21.

[0106] In one embodiment, a sliding member (not shown) is provided on the side of the first portion 121 that contacts the bottom wall 21. The sliding member reduces the contact area between the first portion 121 and the bottom wall 21, thereby reducing the frictional force between the first portion 121 and the bottom wall 21, making it easier for the first portion 121 to move relative to the bottom wall 21.

[0107] In one embodiment, the first portion 121 is formed by extending from the first side portion 123, thereby increasing the structural strength of the holder 12.

[0108] In one embodiment, the first portion 121 and the first side portion 123 are provided separately, making it easier to adjust the position in which the first portion 121 covers the first wall 111a.

[0109] In one embodiment, the first portion 121 covers a portion of the first wall 111a, and the first portion 121 protrudes from the first wall 111a. In the second direction Y, a third gap 21a exists between the bottom wall 21 and the first wall 111a. As an example of the present invention, the first portion 121 covers any one of the two ends of the first wall 111a. As an example of the present invention, the first portion 121 covers the middle portion of the first wall 111a. As an example of the present invention, the first portion 121 includes a segmented structure of multiple segments. As an example of the present invention, the first portion 121 is connected to both ends of the first wall 111a along the third direction Z, making it easier for the battery cell unit 10 to move relative to the bottom wall 21. As an example of the present invention, some of the first parts 121 are connected to both ends of the first wall 111a along the third direction Z, and some of the first parts 121 are connected to the middle portion of the first wall 111a, making it easier for the battery cell unit 10 to move relative to the bottom wall 21.

[0110] As shown in Figure 23, in one embodiment, the battery module 100 further comprises a filling member 30, which is provided in a third gap 21a and can protect the portion of the first wall 111a that is not provided with a first portion 121. In one example of this application, the filling member 30 is elastic. In one example of this application, the filling member 30 contains foam. In one example of this application, the filling member 30 is not elastic.

[0111] In one embodiment, the first portion 121 covers a portion of the first wall 111a and a portion of the second sealing portion 113, thereby protecting the first wall 111a and the second sealing portion 113.

[0112] In one embodiment, the first portion 121 is provided on both the first wall 111a and the second sealing portion 113, thereby enhancing the protection of the first wall 111a and the second sealing portion 113 by the first portion 121, and further increasing the connection strength between the holder 12 and the battery cell 11.

[0113] As shown in Figures 7 and 22, in one embodiment, the bottom wall 21 is provided with a first position restricting portion 211, which extends along a first direction X. The first portion 121 may be in contact with the first position restricting portion 211, and the movement of the battery cell unit 10 is guided by the first position restricting portion 211. In one example of the present invention, the first position restricting portion 211 is formed to protrude from the bottom wall 21 along a second direction Y.

[0114] In one embodiment, the bottom wall 21 is provided with a second position restricting portion 212, which extends along a first direction X. The first position restricting portion 211 and the second position restricting portion 212 are spaced apart along a third direction Z. The main body portion 111 is located between the first position restricting portion 211 and the second position restricting portion 212, and the first portion 121 connected to the first wall 111a is located between the first position restricting portion 211 and the second position restricting portion 212. The first position restricting portion 211 and the second position restricting portion 212 further guide the movement of the battery cell unit 10. In one example of the present application, the second position restricting portion 212 is formed projecting from the bottom wall 21 along a second direction Y.

[0115] As shown in Figures 2, 7, 15, 19 to 23, in one embodiment, the housing 20 includes a top wall 22, the bottom wall 21 and the top wall 22 are arranged opposite each other in a second direction Y, and the battery cell unit 10 is located between the bottom wall 21 and the top wall 22.

[0116] In one embodiment, the holder 12 includes two first portions 121, the two first portions 121 being positioned opposite each other in a second direction Y. One of the two first portions 121 covers at least a portion of the first wall 111a and is connected to the bottom wall 21, and the other first portion 121 covers at least a portion of the second wall 111b and is connected to the top wall 22. The first portions 121 are configured to be movable relative to the bottom wall 21 and the top wall 22. By providing first portions 121 on both the first wall 111a and the second wall 111b, one of the two first portions 121 is configured to be movable relative to the bottom wall 21, and the other first portion 121 is configured to be movable relative to the top wall 22, thereby enabling the battery cell unit 10 to be movable relative to the top wall 22.

[0117] In one embodiment, since the second side portion 124 and the top wall 22 are in contact and connected, the first sealing portion 112 and the main body portion 111 can be moved more easily together, which is further advantageous for protecting the first sealing portion 112.

[0118] In one embodiment, the first portion 121 is connected to the top wall 22 via a small amount of adhesive (not shown), which facilitates the temporary positioning of the battery cell unit 10 when it is installed inside the housing 20. In this application, the adhesive includes an adhesive.

[0119] In one embodiment, the first portion 121 is in contact with and connected to the top wall 22, so that the first portion 121 is configured to be directly movable relative to the top wall 22.

[0120] In one embodiment, a sliding member (not shown) is provided on the side of the first portion 121 that contacts the top wall 22. The sliding member reduces the contact area between the first portion 121 and the top wall 22, thereby reducing the frictional force between the first portion 121 and the top wall 22, making it easier for the first portion 121 to move relative to the top wall 22.

[0121] In one embodiment, the first portion 121 is formed by extending from the second side portion 124, thereby increasing the structural strength of the holder 12.

[0122] In one embodiment, the first portion 121 and the second side portion 124 are provided separately, making it easier to adjust the position in which the first portion 121 covers the second wall 111b.

[0123] In one embodiment, the first portion 121 covers a portion of the second wall 111b, and the first portion 121 protrudes from the second wall 111b. Along the second direction Y, there is a fourth gap 21b between the top wall 22 and the second wall 111b. As an example of the present invention, the first portion 121 covers any one end of the second wall 111b. As an example of the present invention, the first portion 121 covers the middle portion of the second wall 111b. As an example of the present invention, the first portion 121 covering the second wall 111b includes a multi-stage segmented structure. As an example of the present invention, the first portion 121 is connected to both ends of the second wall 111b along the third direction Z, making it easier for the battery cell unit 10 to move relative to the top wall 22. As an example of the present invention, a portion of the first part 121 is connected to both ends of the second wall 111b along the third direction Z, and a portion of the first part 121 is connected to the middle portion of the second wall 111b, making it easier for the battery cell unit 10 to move relative to the top wall 22.

[0124] In one embodiment, the filler member 30 is provided in the fourth gap 21b and can protect the portion of the second wall 111b where the first portion 121 is not provided. As an example of the present invention, the filler member 30 is elastic. As an example of the present invention, the filler member 30 contains foam. As an example of the present invention, the filler member 30 is not elastic.

[0125] In one embodiment, the first portion 121 can enhance the protection of the second wall 111b by covering the entire second wall 111b.

[0126] In one embodiment, the first portion 121 can protect the second wall 111b and the second sealing portion 113 by covering a portion of the second wall 111b and a portion of the other second sealing portion 113.

[0127] In one embodiment, the first portion 121 is provided on both the second wall 111b and the other second sealing portion 113, thereby enhancing the protection of the second wall 111b and the second sealing portion 113 by the first portion 121, and further increasing the connection strength between the holder 12 and the battery cell 11.

[0128] As shown in Figures 7 and 21, in one embodiment, the top wall 22 is provided with a third position restricting portion 221, which extends along a first direction X, and the first portion 121 can contact the third position restricting portion 221. The movement of the battery cell unit 10 is guided by the third position restricting portion 221. In one example of the present invention, the third position restricting portion 221 is formed projecting from the top wall 22 along a direction Y' opposite to the second direction Y.

[0129] In one embodiment, the top wall 22 is provided with a fourth position restrictor 222, which extends along a first direction X. The third position restrictor 221 and the fourth position restrictor 222 are spaced apart along a third direction Z. The main body 111 is located between the third position restrictor 221 and the fourth position restrictor 222, and the first portion 121 connected to the second wall 111b is located between the third position restrictor 221 and the fourth position restrictor 222. The third position restrictor 221 and the fourth position restrictor 222 further guide the movement of the battery cell unit 10. In one example of the present invention, the fourth position restrictor 222 is formed projecting from the top wall 22 along a direction Y' opposite to the second direction Y.

[0130] In one embodiment, if the battery module 100 includes two holders 12, each holder 12 includes four first parts 121, of which two first parts 121 are provided on both sides of the main body 111 along a second direction Y, and the other two first parts 121 are provided on both sides of the main body 111 along a third direction Z. A first wall 111a is connected to two first parts 121, and a second wall 111b is connected to two first parts 121. By providing two first parts 121 on both the first wall 111a and the second wall 111b, the two first parts 121 are configured to be movable relative to the bottom wall 21 and also movable relative to the top wall 22, making it easier for the battery cell unit 10 to move relative to the bottom wall 21 and the top wall 22.

[0131] As shown in Figures 2 and 7, in one embodiment, the housing 20 includes a rear wall 23, a front wall 24, a first side wall 25, and a second side wall 26. The rear wall 23 and the front wall 24 are provided along a first direction X, and the first side wall 25 and the second side wall 26 are provided along a third direction Z. The rear wall 23 connects the first side wall 25 and the second side wall 26, the front wall 24 connects the first side wall 25 and the second side wall 26, the bottom wall 21 is connected to the rear wall 23, the front wall 24, the first side wall 25, and the second side wall 26, and the top wall 22 is connected to the rear wall 23, the front wall 24, the first side wall 25, and the second side wall 26 to form a first space 20a, and a plurality of battery cell units 10 are provided within the first space 20a.

[0132] As shown in Figures 2, 23 to 25, in one embodiment, the battery module 100 further comprises a first elastic member 40, and in the first direction X, the plurality of battery cell units 10 and the first elastic member 40 are arranged along the first direction X. In one example of the present application, the plurality of battery cell units 10 and the first elastic member 40 are arranged and installed along the first direction X. In one example of the present application, the first elastic member 40 and the plurality of battery cell units 10 are arranged and installed along the first direction X. In the present application, along the first direction X, the first elastic member 40 is located between the plurality of battery cell units 10 and the front wall 24. In another embodiment, along the first direction X, the first elastic member 40 is located between the front wall 24 and the plurality of battery cell units 10.

[0133] The first elastic member 40 is provided between the battery cell unit 10 and the housing 20. When the battery cell 11 expands, the first elastic member 40 is compressed by the battery cell 11, and further provides expansion space for the battery cell 11, thereby buffering the pressure applied to the battery cell unit 10 and reducing the impact on the lifespan of the battery module 100.

[0134] In one embodiment, the first elastic member 40 is configured to apply pressure to the battery cell unit 10, and a plurality of battery cell units 10 arranged along the first direction X are in a pressurized state.

[0135] In one embodiment, when the battery cell 11 is not expanded, the first elastic member 40 provides pressure to be applied to the battery cell 11, and when the battery cell 11 is expanded, the battery cell 11 moves between the bottom wall 21 and the top wall 22, providing expansion space to the battery cell 11 by the first elastic member 40, and also dynamically balancing the multiple battery cell units 10 by continuously applying more pressure to the multiple battery cell units 10.

[0136] In one embodiment, when the battery cell 11 is not expanding, the first elastic member 40 does not apply pressure to the battery cell unit 10. When the battery cell 11 is expanding, the battery cell 11 compresses the first elastic member 40, providing the battery cell 11 with expansion space through the first elastic member 40, and simultaneously applying more pressure to the multiple battery cell units 10 continuously, thereby achieving dynamic balance among the multiple battery cell units 10.

[0137] In one embodiment, the first elastic member 40 includes a base portion 41 and a bent portion 42, the base portion 41 being connected to the bent portion 42, and the bent portion 42 being fixedly connected to the housing 20. The base portion 41 is configured to be able to apply pressure to the battery cell unit 10, and the bent portion 42 is configured to be able to provide an expansion space to the battery cell unit 10.

[0138] In some embodiments, the base 41 is connected to the main body 111 of the outermost battery cell 11. The base 41 is provided with a plurality of protrusions 411 spaced apart along a third direction Z, and the protrusions 411 are formed recessed in the direction away from the main body 111 from the side of the base 41 facing the main body 111, thereby increasing the structural strength of the base 41 and reducing the risk of deformation of the base 41 due to uneven load distribution.

[0139] In some embodiments, the bent portion 42 includes a first bent portion 421 and a second bent portion 422, wherein in the second direction Y, the first bent portion 421 is connected to one side of the base portion 41, and the second bent portion 422 is connected to the base portion 41 other sideIn another embodiment, along the third direction Z, the first bend 421 is connected to one side of the base 41, and the second bend 422 is connected to the base 4 1 It is connected to the other side. The first bent portion 421 and the second bent portion 422 can act on the battery cell unit 10 by the base portion 41, and the first bent portion 421 and the second bent portion 422 can provide expansion space to the battery cell unit 10.

[0140] In some embodiments, the first elastic member 40 includes a first connecting segment 43, which is connected to the side of the first bend 421 away from the base 41, and the first connecting segment 43 is fixed to the housing 20, and the first bend 421 is fixed to the housing 20 via the first connecting segment 43, and the forces acting on the first bend 421 can be transmitted to the housing 20.

[0141] In some embodiments, the first connecting segment 43 is parallel to the base 41, and the first elastic member 40 is favored to deformation in the first direction X.

[0142] In some embodiments, the first elastic member 40 includes a second connecting segment 44, which is connected to the side of the second bent portion 422 away from the base 41, and the second connecting segment 44 is fixed to the housing 20, and the second bent portion 422 is fixed to the housing 20 via the second connecting segment 44, and the force acting on the bent portion 42 can be transmitted to the housing 20.

[0143] In some embodiments, the second connecting segment 44 is parallel to the base 41, and the first elastic member 40 is favored to deformation in the first direction X.

[0144] In some embodiments, the first side wall 25 is provided with a first fixing portion 251, and the projection of the first connecting segment 43 and the projection of the first fixing portion 251 overlap along the first direction X, and the first connecting segment 43 is fixed to the first fixing portion 251. Examples include solder fixing, adhesive fixing, contact fixing, engagement fixing, screw fixing, etc. In some embodiments, the second side wall 26 is provided with a second fixing portion 261, and the projection of the first connecting segment 43 and the projection of the second fixing portion 261 overlap along the first direction X, and the first connecting segment 43 is fixed to the second fixing portion 261. Examples include solder fixing, adhesive fixing, contact fixing, engagement fixing, screw fixing, etc.

[0145] In some embodiments, the first fixing portion 251 is closer to the battery cell unit 10 than the first connection segment 43, making it easier to fix the first fixing portion 251 and the first connection segment 43 together.

[0146] In some embodiments, the second fixing portion 261 is closer to the battery cell unit 10 than the first connection segment 43, making it easier to fix the second fixing portion 261 and the first connection segment 43 together.

[0147] In some embodiments, the structural strength of the first side wall 25 is greater than that of the first elastic member 40, thereby reducing the risk of deformation of the first side wall 25 due to the force acting on the first bent portion 421.

[0148] In some embodiments, the structural strength of the second side wall 26 is greater than that of the first elastic member 40, thereby reducing the risk of deformation of the second side wall 26 due to the force acting on the first bent portion 421.

[0149] In some embodiments, the thickness of the first side wall 25 is greater than the maximum thickness of the base 41, the first bent portion 421, and the first connecting segment 43, thereby increasing the structural strength of the first side wall 25 and reducing the risk of deformation of the first side wall 25 due to the force acting on the first bent portion 421.

[0150] In some embodiments, the thickness of the second side wall 26 is greater than the maximum thickness of the base 41, the first bent portion 421, and the first connecting segment 43, thereby increasing the structural strength of the second side wall 26 and reducing the risk of deformation of the second side wall 26 due to the force acting on the first bent portion 421.

[0151] In some embodiments, the bottom wall 21 is provided with a third fixing portion 213, and the projection of the second connecting segment 44 and the projection of the third fixing portion 213 overlap along the first direction X, and the second connecting segment 44 is fixed to the third fixing portion 213. In one example of the present invention, the bottom wall 21 is provided with a plurality of third fixing portions 213, which are spaced apart along the third direction Z, and the second connecting segment 44 is fixed to the plurality of third fixing portions 213, thereby increasing the connection strength between the second connecting segment 44 and the bottom wall 21. Examples include solder fixing, adhesive fixing, contact fixing, engagement fixing, screw fixing, etc.

[0152] In some embodiments, the third fixing portion 213 is closer to the battery cell unit 10 than the second connection segment 44, making it easier to fix the third fixing portion 213 and the second connection segment 44 together.

[0153] In some embodiments, the structural strength of the bottom wall 21 is greater than that of the first elastic member 40, thus reducing the risk of deformation of the bottom wall 21 due to the force acting on the first bent portion 421.

[0154] In some embodiments, the thickness of the bottom wall 21 is greater than the maximum thickness of the base 41, the second bent portion 422, and the second connecting segment 44, thereby increasing the structural strength of the bottom wall 21 and reducing the risk of deformation of the bottom wall 21 due to the force acting on the second bent portion 422.

[0155] In some embodiments, the first bent portion 421 includes a first bent segment 421a and a second bent segment 421b, the first bent segment 421a being connected to the base 41, and the second bent segment 421b connecting the first bent segment 421a and the first connecting segment 43. The first bent segment 421a and the base 41 form a first angle A1, the second bent segment 421b and the first connecting segment 43 form a second angle B1, and the first bent segment 421a and the second bent segment 421b form a third angle C1, where A1 ≥ B1. This is advantageous in increasing the deformation resistance of the first bent segment 421a and reducing the risk of deformation of the first elastic member 40 in the first direction X.

[0156] In some embodiments, C1 > A1, which is advantageous for improving the uniform deformation of the first bent portion 421.

[0157] In some embodiments, C1=2B1=2A1, which is advantageous for further improving the uniform deformation of the first bent portion 421.

[0158] In some embodiments, the second bent portion 422 includes a third bent segment 422a and a fourth bent segment 422b, the third bent segment 422a being connected to the base 41, and the fourth bent segment 422b connecting the third bent segment 422a to the second connecting segment 44. The third bent segment 422a and the base 41 form a first angle A2, the fourth bent segment 422b and the second connecting segment 44 form a second angle B2, and the third bent segment 422a and the fourth bent segment 422b form a third angle C2, with A2 ≥ B2. This is advantageous in increasing the deformation resistance of the third bent segment 422a and reducing the risk of deformation of the first elastic member 40 in the first direction X.

[0159] In some embodiments, C2 > A2, which is advantageous for improving the uniform deformation of the second bent portion 422.

[0160] In some embodiments, C2 = B2 = 2A2, which is advantageous for further improving the uniform deformation of the second bent portion 422.

[0161] In some embodiments, the structures of the first bent portion 421 and the second bent portion 422 are identical, which is advantageous for uniform force absorption and uniform deformation. In one example of this application, the second bent portion 422 is set to the same angle as the first bent portion 421. When the first bent portion 421 and the second bent portion 422 are subjected to force, they are subjected to force uniformly and deform uniformly, reducing the risk of rotation of the first elastic member 40 due to uneven deformation. In one example of this application, A1=A2, B1=B2, and C1=C2.

[0162] In one embodiment, a second elastic member 45 is provided between the first elastic member 40 and the battery cell 11, and the second elastic member 45 is configured to be compressible, providing further expansion space to the battery cell 11 and allowing further pressure to be applied to the battery cell 11. As an example of the present invention, the second elastic member 45 includes a foam.

[0163] In one embodiment, a third elastic member 46 is provided between the rear wall 23 and the battery cell 11, and when the battery cell 11 expands, the third elastic member 46 is configured to be compressible, providing the battery cell 11 with further expansion space and allowing further pressure to be applied to the battery cell 11. As an example of the present invention, the third elastic member 46 includes a foam.

[0164] As shown in Figure 26, the present invention further provides an electrical device 200 employing the battery module 100. In one embodiment, the electrical device 200 of the present invention may be, but is not limited to, an electronic device, a drone, a backup power supply, an electric vehicle, an electric motorcycle, an electric assist bicycle, a power tool, a large household battery storage module, etc.

[0165] The embodiments described above are for illustrative purposes only and not to limit the present application. Those skilled in the art should recognize that appropriate modifications and changes to the embodiments described above are within the scope of the disclosure, as long as they are within the substantial spirit of the present application. [Explanation of symbols]

[0166] Battery module 100 Battery cell unit 10 Battery cell 11 Battery cell housing 11a Main body 111 Wall 111a The second wall 111b The third wall 111c The fourth wall 111d The fifth wall 111e The 6th Wall 111f Case 1 1111 First recess 1111a Case 2 1112 Second recess 1112a First extension side 1113 Second extension side 1114 First sealing section 112 First connection part 112a Second connection section 112b Third connection part 112c Second sealing section 113 Electrode assembly 11b Electrode terminal 11c Holder 12 Part 1, 121 First protrusion 1211 Third recess 1212 Part 2, 122 First side portion 123 First interval 123a Second side 124 Second interval 124a Fourth connection part 125 Part 3, 126 20 enclosures First space 20a Bottom wall 21 First position regulating unit 211 Second position regulating section 212 Third fixing part 213 Third interval 21a Fourth interval 21b Ceiling Wall 22 Third position regulating section 221 Fourth position regulating section 222 back wall 23 front wall 24 First side wall 25 First fixing part 251 Second side wall 26 Second fixing part 261 Filling material 30 First elastic member 40 base 41 Bending part 42 First bent section 421 First bent segment 421a Second bent segment 421b Second bent section 422 Third bent segment 422a Fourth bend segment 422b First connection segment 43 Second connection segment 44 Second elastic member 45 Third elastic member 46 Electrical equipment 200 1st direction Second direction Y 3rd direction Z

Claims

1. It is a battery module, It comprises multiple battery cell units arranged along a first direction, Each of the aforementioned battery cell units includes a battery cell and a holder, The battery cell includes an electrode assembly, a battery cell housing, and electrode terminals connected to the electrode assembly and extending from the battery cell housing. The battery cell housing includes a main body, the electrode assembly is provided within the main body, and the main body includes a first wall and a second wall arranged along a second direction. The holder includes a first portion, the first portion covering at least a portion of the first wall, The aforementioned battery module further comprises a housing, The aforementioned enclosure includes the bottom wall, The first part is connected to the bottom wall, The bottom wall, the first portion, and the battery cell unit are arranged along the second direction. The first portion is configured to be movable along the first direction relative to the bottom wall, A battery module characterized in that the second direction is perpendicular to the first direction.

2. A battery module according to claim 1, The battery module is characterized in that the first portion is connected in contact with the bottom wall.

3. A battery module according to claim 1 or 2, The battery cell housing includes a first sealing portion, The first sealing portion extends from the main body portion and includes a first connecting portion. The holder includes a second portion that covers at least a part of the first connecting portion, The battery module is characterized in that the electrode terminals protrude from the first connection portion.

4. A battery module according to claim 3, The first sealing portion includes a first bent portion and a second bent portion that are arranged opposite to each other in the second direction, The first bent portion is connected to the second bent portion via the first connecting portion. The battery module is characterized in that the holder includes a first side portion that covers the first bent portion and a second side portion that covers the second bent portion.

5. A battery module according to claim 4, Viewed from the first direction, a portion of the first connecting portion is located between the main body and the second portion in the second direction, and a portion of the first connecting portion is located between the first side and the second side in the third direction. A battery module characterized in that any two of the first, second, and third directions are perpendicular to each other.

6. A battery module according to claim 4 or 5, The battery module is characterized in that the first side portion is connected in contact with the bottom wall.

7. A battery module according to any one of claims 1 to 6, The bottom wall is provided with a first position restricting section and a second position restricting section. The first position restricting portion and the second position restricting portion are provided at intervals along the third direction, The battery module is characterized in that the first portion is located between the first position restricting portion and the second position restricting portion.

8. A battery module according to any one of claims 1 to 7, The enclosure includes the top wall, The bottom wall and the top wall are arranged opposite each other in the second direction. The holder includes two first parts, the two first parts being arranged opposite each other in the second direction, One of the two first parts is connected to the bottom wall, and this first part is configured to be movable relative to the bottom wall. A battery module characterized in that the other first portion of the two first portions covers at least a part of the second wall, and the other first portion is connected to the top wall and is configured to be movable relative to the top wall.

9. A battery module according to claim 8, The aforementioned ceiling wall is provided with a third position restricting section and a fourth position restricting section. The third position restricting portion and the fourth position restricting portion are provided at intervals along the third direction, The battery module is characterized in that the first portion connected to the top wall is located between the third position restricting portion and the fourth position restricting portion.

10. A battery module according to any one of claims 1 to 9, Further comprising a first elastic member, The plurality of battery cell units and the first elastic member are arranged along the first direction, The battery module is characterized in that the first elastic member is configured to provide an expansion space for the battery cell.

11. A battery module according to claim 10, The battery module is characterized in that the first elastic member is configured to be able to apply pressure to the battery cell unit.

12. A battery module according to claim 11, The first elastic member includes a base and a bent portion, The base is connected to the bent portion, The bent portion is fixed to the housing, The base is configured to be able to apply pressure to the battery cell unit, The battery module is characterized in that the bent portion is configured to provide an expansion space for the battery cell unit.

13. A battery module according to claim 12, The aforementioned bent portion includes a first bent portion and a second bent portion, The first bent portion and the second bent portion are arranged opposite each other in the second direction. The first bent portion is connected to one side of the base portion, The battery module is characterized in that the second bent portion is connected to the other side of the base portion.

14. A battery module according to claim 13, The first elastic member includes a first connecting segment, The first connecting segment is connected to the side of the first bent portion away from the base, The battery module is characterized in that the first connection segment is fixed to the housing.

15. A battery module according to claim 13, The first bent portion includes a first bent segment and a second bent segment, The first bent segment connects the base and the second bent segment, A battery module characterized in that the second bent segment is connected to the first connecting segment.

16. A battery module according to claim 15, The first bent segment and the base are at a first angle A １ Forming, The second bent segment and the first connecting segment are at a second angle B １ Forming, A １ ≥ B １ A battery module characterized by the following:

17. A battery module according to claim 16, The first bent segment and the second bent segment are at a third angle C １ Forming, C １ > A １ A battery module characterized by the following:

18. A battery module according to claim 17, C １ = 2A １ = 2B １ A battery module characterized by being as described above.

19. A battery module according to any one of claims 14 to 17, The housing includes a first side wall, The first side wall is provided with a first fixing portion, In the first direction, the projection of the first connecting segment and the projection of the first fixed part overlap. A battery module characterized in that the first connection segment is fixed to the first fixed part.

20. A battery module according to claim 19, A battery module characterized in that the structural strength of the first side wall is greater than the structural strength of the first elastic member.

21. A battery module according to any one of claims 14 to 20, The first elastic member includes a second connecting segment, The second connecting segment is connected to the side of the second bent portion away from the base, The battery module is characterized in that the second connection segment is fixed to the housing.

22. A battery module according to claim 21, The bottom wall is provided with a third fixing part. In the first direction, the projection of the second connecting segment and the projection of the third fixed part overlap. The battery module is characterized in that the second connection segment is fixed to the third fixed portion.

23. A battery module according to any one of claims 13 to 22, A battery module characterized in that the structure of the first bent portion is the same as the structure of the second bent portion.

24. A battery module according to any one of claims 1 to 23, A battery module characterized in that, in the second direction, a third gap exists between the first wall and the bottom wall.

25. A battery module according to claim 24, Further comprising a filling member, The battery module is characterized in that the filling member is provided at the third interval.

26. A battery module according to any one of claims 1 to 25, A battery module characterized in that the main bodies of adjacent battery cell housings are connected in contact.

27. A battery module according to any one of claims 1 to 26, The battery cell housing includes a third wall and a fourth wall, The third wall and the fourth wall are positioned opposite each other in the first direction. A battery module characterized in that, when viewed from a direction opposite to the third direction, in the first direction, the first portion does not extend beyond the third wall, and the first portion does not extend beyond the fourth wall.

28. A battery module according to claim 27, The electrode assembly has a wound structure, It includes a first straight segment, a second straight segment, a first curved segment, and a second curved segment, The first straight segment connects the first curved segment and the second curved segment, The second straight segment connects the first curved segment and the second curved segment, A battery module characterized in that, in the first direction, the projection of the third wall covers the projection of the first linear segment, and the projection of the fourth wall covers the projection of the second linear segment.

29. A battery module according to claim 28, A battery module characterized in that, in the first direction, the projection of the first portion and the projection of the first curved segment overlap, the projection of the first portion and the projection of the first straight segment are separated, and the projection of the first portion and the projection of the second straight segment are separated.

30. A battery module according to any one of claims 1 to 29, The battery module is characterized in that the holder is integrally molded with the battery cell.

31. A battery module according to any one of claims 1 to 30, The battery module is characterized in that the holder is an insulating holder.

32. An electrical device characterized by comprising a battery module according to any one of claims 1 to 31.

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