Cover plate device, battery, battery pack, battery pack and electric equipment

Abstract

The utility model discloses a cover plate device, a battery, a battery pack, a battery pack and electric equipment. The cover plate device comprises a cover plate main body assembly and an insulating separator; the cover plate main body assembly comprises a first cover plate main body, a second cover plate main body and a main body insulating part; the first cover plate main body is used for being connected to a battery cell shell; the second cover plate main body is used for being connected to another battery cell shell; the main body insulating part is positioned between the first cover plate main body and the second cover plate main body; the insulating separator is located on the side of the cover plate main body assembly, and accommodating ribs arranged on the surface, away from the cover plate main body assembly, of the insulating separator define an accommodating cavity. Therefore, the cover plate device is connected with the two battery cell shells and is connected with the two battery cells in series, so that the voltage of the battery is increased; the arrangement of the accommodating cavity facilitates the installation and positioning of the conductive member.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, and particularly to a cover plate device, a battery, a battery pack, a battery pack and electrical equipment. Background Art

[0002] Existing electrical equipment includes a battery. The battery includes a cover plate device. Two battery cells of the battery are connected in series through the cover plate device. The cover plate device includes a conductive member for connecting to the tab of the battery cell, a cover plate main body connecting and wrapping the battery cell case, an insulating partition member separating the cover plate main body and the conductive member, and a conductive column. The conductive column penetrates through the cover plate main body, the insulating partition member and the conductive member, so that two battery cells of the battery can be connected in series.

[0003] Among them, the conductive member is directly attached to the insulating partition member. In this way, when installing the cover plate device, it is necessary to position the conductive member relative to the insulating partition member to align the hole for the conductive column of the conductive member and the hole for the conductive column of the insulating partition member, and the operation is complicated.

[0004] Therefore, the utility model provides a cover plate device, a battery, a battery pack, a battery pack and electrical equipment to at least partially solve the above problems. Summary of the Utility Model

[0005] A series of simplified concepts are introduced in the summary of the utility model part, which will be further described in detail in the specific embodiment part. The summary of the utility model part of the utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above technical problems, the utility model provides a cover plate device for connecting two battery cells in series. The battery cells are wrapped with battery cell cases. The cover plate device includes:

[0007] A cover plate main body assembly, which includes:

[0008] A first cover plate main body for connecting to one battery cell case;

[0009] A second cover plate main body for connecting to the other battery cell case;

[0010] A main body insulating member located between the first cover plate main body and the second cover plate main body;

[0011] An insulating partition member located on the side of the cover plate main body assembly. The surface of the insulating partition member away from the cover plate main body assembly has receiving ribs surrounding a receiving cavity.

[0012] According to the cover plate device of the present utility model, the cover plate device connects two battery cell cases and connects two battery cells in series to increase the voltage of the battery; the provision of the accommodation cavity facilitates the installation and positioning of the conductive member; in addition, the accommodation cavity can protect the conductive member; the cover plate main body assembly includes the first cover plate main body, the second cover plate main body and the main body insulating member, which avoids the electrical connection between the first cover plate main body and the second cover plate main body, thereby avoiding the electrical connection between the first battery cell case and the second battery cell case, and further reducing the possibility of battery short circuit.

[0013] Optionally, the cover plate device further includes:

[0014] A conductive member, which is located in the accommodation cavity;

[0015] A conductive post, which penetrates through the cover plate main body assembly and the insulating partition member;

[0016] Wherein, the conductive member is used to connect the ear of the battery cell, and the conductive post is electrically connected to the conductive member to connect two battery cells in series.

[0017] Optionally, the insulating partition member includes a first insulating partition member and a second insulating partition member, and the first insulating partition member and the second insulating partition member are respectively located on both sides of the cover plate main body assembly;

[0018] The conductive member includes a first conductive member and a second conductive member. The first conductive member is located in the accommodation cavity of the first insulating partition member for connecting the positive electrode of one battery cell, and the second conductive member is located in the accommodation cavity of the second insulating partition member for connecting the negative electrode of the other battery cell.

[0019] Optionally, the surface of the insulating partition member away from the cover plate main body assembly is provided with an expansion rib, and the expansion rib is connected to the accommodation rib to form an expansion groove, and the expansion groove is spaced apart from the accommodation cavity.

[0020] Optionally, the expansion rib is recessed along the width direction of the insulating partition member to form a mounting groove.

[0021] Optionally, the conductive member has a mounting hole, and the mounting hole includes a first hole section and a second hole section that communicate with each other. The inner diameter of the first hole section is larger than the inner diameter of the second hole section. The first hole section is located on the side of the second hole section away from the cover plate main body assembly, and the conductive post penetrates through the second hole section.

[0022] Optionally, the conductive post includes a main body and an annular flange radially protruding outward from the outer peripheral surface of the main body. The annular flange is located between the two ends of the conductive post. The main body penetrates through the first conductive member and the second conductive member, and the annular flange abuts against the first conductive member.

[0023] Optionally, the cover plate device further includes a sealing member, and the sealing member is sleeved on the conductive post and is located between the cover plate main body assembly and the conductive post.

[0024] Optionally, the seal includes a first section and a second section, the outer diameter of the second section being greater than that of the first section, and along the axial direction of the conductive post, the second section is located on the side of the cover plate main body assembly.

[0025] Optionally, the conductive post includes a first part and a second part, the first part including a copper part and the second part including an aluminum part.

[0026] Optionally, along the axial direction of the conductive post, the seal covers the connection between the first part and the second part.

[0027] Optionally, the conductive post is an aluminum part.

[0028] Optionally, the first cover plate main body has a first cover plate positioning part, the main body insulator has a first main body positioning part corresponding to the first cover plate positioning part, and one of the first cover plate positioning part and the first main body positioning part extends into the other.

[0029] Optionally, the second cover plate main body has a second cover plate positioning part, the main body insulator has a second main body positioning part corresponding to the second cover plate positioning part, and one of the second cover plate positioning part and the second main body positioning part extends into the other.

[0030] The present utility model also provides a battery, the battery including the aforementioned cover plate device.

[0031] For the battery according to the present utility model, the battery includes the aforementioned cover plate device, the cover plate device connecting two battery cell cases and connecting two battery cells in series so as to increase the voltage of the battery; the provision of the accommodation cavity facilitates the installation and positioning of the conductive member; in addition, the accommodation cavity can protect the conductive member; the cover plate main body assembly including the first cover plate main body, the second cover plate main body and the main body insulator is provided to prevent the first cover plate main body and the second cover plate main body from being electrically connected, thereby preventing the first battery cell case and the second battery cell case from being electrically connected, and further reducing the possibility of battery short - circuit.

[0032] Optionally, the battery has an end cover plate, and the end cover plate is provided with at least one of a liquid injection hole and an explosion - proof valve.

[0033] Optionally, the accommodation ribs include a first accommodation rib and a second accommodation rib to enclose the accommodation cavity, and the extending direction of the first accommodation rib intersects with the extending direction of the second accommodation rib.

[0034] The present utility model also provides a battery pack, the battery pack including the aforementioned battery.

[0035] According to the battery pack of the present utility model, the battery pack includes the aforementioned battery, the battery includes the aforementioned cover plate device, the cover plate device connects two battery cell cases and connects two battery cells in series to increase the voltage of the battery; the setting of the accommodation cavity facilitates the installation and positioning of the conductive member; in addition, the accommodation cavity can protect the conductive member; the cover plate main body assembly includes the first cover plate main body, the second cover plate main body and the main body insulating member, which avoids the electrical connection between the first cover plate main body and the second cover plate main body, thereby avoiding the electrical connection between the first battery cell case and the second battery cell case, and further reducing the possibility of battery short circuit.

[0036] The present utility model also provides a battery pack, which includes the aforementioned battery pack.

[0037] According to the battery pack of the present utility model, the battery pack includes the aforementioned battery pack, the battery pack includes the aforementioned battery, the battery includes the aforementioned cover plate device, the cover plate device connects two battery cell cases and connects two battery cells in series to increase the voltage of the battery; the setting of the accommodation cavity facilitates the installation and positioning of the conductive member; in addition, the accommodation cavity can protect the conductive member; the cover plate main body assembly includes the first cover plate main body, the second cover plate main body and the main body insulating member, which avoids the electrical connection between the first cover plate main body and the second cover plate main body, thereby avoiding the electrical connection between the first battery cell case and the second battery cell case, and further reducing the possibility of battery short circuit.

[0038] The present utility model also provides an electrical device, which includes the aforementioned battery pack.

[0039] According to the electrical device of the present utility model, the electrical device includes the aforementioned battery pack, the battery pack includes the aforementioned battery pack, the battery pack includes the aforementioned battery, the battery includes the aforementioned cover plate device, the cover plate device connects two battery cell cases and connects two battery cells in series to increase the voltage of the battery; the setting of the accommodation cavity facilitates the installation and positioning of the conductive member; in addition, the accommodation cavity can protect the conductive member; the cover plate main body assembly includes the first cover plate main body, the second cover plate main body and the main body insulating member, which avoids the electrical connection between the first cover plate main body and the second cover plate main body, thereby avoiding the electrical connection between the first battery cell case and the second battery cell case, and further reducing the possibility of battery short circuit. Description of the Drawings

[0040] In order to make the advantages of the present utility model easier to understand, the present utility model briefly described above will be described in more detail by referring to the specific embodiments shown in the drawings. It can be understood that these drawings only depict the typical embodiments of the present utility model, and therefore should not be considered as a limitation to its protection scope. The present utility model is described and explained with additional features and details through the drawings.

[0041] Figure 1 Stereoscopic schematic diagram of a battery using the cover plate device according to a preferred embodiment of the present utility model;

[0042] Figure 2 Front view schematic diagram of the battery using the Figure 1 cover plate device;

[0043] Figure 3 Front view schematic diagram of the battery using the Figure 1 cover plate device;

[0044] Figure 4 Partial enlarged schematic diagram at position A of the battery using the Figure 2 cover plate device;

[0045] Figure 5 Isometric schematic diagram of the Figure 1 cover plate device;

[0046] Figure 6 Exploded schematic diagram of the Figure 5 cover plate device;

[0047] Figure 7 Top view schematic diagram of the Figure 5 cover plate device;

[0048] Figure 8 Cross-sectional schematic diagram taken along line B-B of the Figure 7 cover plate device; and

[0049] Figure 9 Cross-sectional schematic diagram taken along line C-C of the Figure 7 cover plate device.

[0050] Explanation of reference numerals

[0051] 101: First battery cell case 102: Second battery cell case

[0052] 110: Cover plate main assembly 111: First cover plate main body

[0053] 112: First cover plate through hole 113: First cover plate positioning part

[0054] 114: Second cover plate main body 115: Second cover plate through hole

[0055] 116: Second cover plate positioning part 120: Insulating partition

[0056] 121: First insulating partition 122: Second insulating partition

[0057] 123: Accommodating rib 124: Accommodating cavity

[0058] 125: Expanding rib 126: Expanding groove

[0059] 127: Mounting groove 128: Insulating through hole

[0060] 130: Conductive part 131: First conductive part

[0061] 132: Second conductive part 133: Mounting hole

[0062] 134: First hole section 135: Second hole section

[0063] 140: Conductive column 141: Body

[0064] 142: Annular flange 143: First part

[0065] 144: Second part 150: Sealing part

[0066] 151: First section 152: Second section

[0067] 153: Central through hole 155: First sealing part

[0068] 156: Second sealing part 160: Positive electrode cover plate

[0069] 161: Negative electrode cover plate 162: Liquid injection hole

[0070] 163: Explosion-proof valve 171: Main body insulating part

[0071] 172: Main body through hole 173: First main body positioning part

[0072] 174: Second main body positioning part 173: Cover plate through hole

[0073] 181: First accommodating rib 182: Second accommodating rib Detailed implementation mode

[0074] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the embodiments of the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present utility model, some well-known technical features in the art are not described.

[0075] The preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are for illustrative purposes only and not for limitation.

[0076] In this article, the ordinal numbers such as "first" and "second" cited in the present utility model are only identifiers and do not have any other meanings, such as a specific order, etc.

[0077] To thoroughly understand the embodiments of the present utility model, detailed structures will be presented in the following description. Apparently, the implementation of the embodiments of the present utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model may also have other embodiments.

[0078] The present utility model provides a cover plate device. The cover plate device can be used for a battery. The battery can be a blade battery. The battery includes two battery cells. It can be understood that in embodiments not shown, the battery can also be in a cuboid structure or other shapes.

[0079] Please refer to Figures 1 to 4 , the two battery cells include a first battery cell and a second battery cell. The battery further includes a first battery cell case 101 (an example of a battery cell case) and a second battery cell case 102 (another example of a battery cell case). The first battery cell case 101 wraps the first battery cell. The second battery cell case 102 wraps the second battery cell. The cover plate device can connect the first battery cell case 101 and the second battery cell case 102 and connect the first battery cell and the second battery cell in series.

[0080] Please refer to Figures 1 to 9 , the cover plate device includes a cover plate main body assembly 110. The cover plate main body assembly 110 includes a first cover plate main body 111, a second cover plate main body 114, and a main body insulating member 171.

[0081] The battery cell case can be a metal part (such as an aluminum alloy part). The battery cell case has an internal cavity. The end of the battery cell case along the length direction of the battery has a connection opening. The connection opening communicates with the internal cavity of the battery cell case. The battery cell is arranged in the internal cavity of the battery cell case.

[0082] As Figures 1 to 3 shown, along the length direction of the battery ( Figure 3 the left - right direction), the first battery cell case 101 and the second battery cell case 102 are arranged in sequence. The connection openings of the first battery cell case 101 and the second battery cell case 102 face each other. Along the length direction of the battery, the cover plate main body assembly 110 is located between the first battery cell case 101 and the second battery cell case 102.

[0083] As Figure 6 shown, the first cover plate main body 111 can be a rectangular plate part. The first cover plate main body 111 can be a metal part. Such as an aluminum alloy part. The outer edge of the first cover plate main body 111 is circumferentially connected (such as welded) to the edge of the connection opening of the first battery cell case 101 to cover the connection opening of the first battery cell case 101. In this way, the connection strength between the first cover plate main body 111 and the first battery cell case 101 is high. The sealing performance at the connection between the first cover plate main body 111 and the first battery cell case 101 is strong.

[0084] The second cover body 114 can be a rectangular plate member. The second cover body 114 can be a metal member. For example, an aluminum alloy member. The outer edge of the second cover body 114 is circumferentially connected (e.g., welded) to the edge of the connection opening of the second battery cell case 102 to cover the connection opening of the second battery cell case 102. In this way, the connection strength between the second cover body 114 and the second battery cell case 102 is high. The sealing performance at the connection between the second cover body 114 and the second battery cell case 102 is strong.

[0085] The main body insulating member 171 can be a rectangular plate member. The main body insulating member 171 is made of an insulating material. For example, the main body insulating member 171 can be a plastic member. The main body insulating member 171 is located between the first cover body 111 and the second cover body 114. In this way, the main body insulating member 171 can separate the first cover body 111 and the second cover body 114, avoiding electrical connection between the first cover body 111 and the second cover body 114, thereby avoiding electrical connection between the first battery cell case 101 and the second battery cell case 102, and further reducing the possibility of battery short circuit.

[0086] Please continue to refer to Figure 6 , the first cover body 111 has a first cover through hole 112. The second cover body 114 has a second cover through hole 115. The main body insulating member 171 has a main body through hole 172. The first cover body 111, the second cover body 114 and the main body insulating member 171 are connected so that the first cover through hole 112, the second cover through hole 115 and the main body through hole 172 communicate with each other to form a cover through hole 173.

[0087] As Figures 5 to 9 shown, the cover device further includes an insulating partition member 120. The insulating partition member 120 can be a rectangular plate member. The insulating partition member 120 is made of an insulating material. For example, the insulating partition member 120 can be a plastic member. The insulating partition member 120 is located on the side of the cover body assembly 110. The insulating partition member 120 is connected to the cover body assembly 110. The projection of the insulating partition member 120 on the projection plane covers at least part of the projection of the cover body assembly 110 on the projection plane to prevent the electrolyte in the battery cell case from contacting the cover body assembly 110. The projection plane is perpendicular to the axial direction of the conductive post 140 described later.

[0088] As Figures 6 to 9 shown, the surface of the insulating partition member 120 away from the cover body assembly 110 has a receiving rib 123. The receiving rib 123 extends and protrudes in the thickness direction of the insulating partition member 120. The receiving rib 123 forms a receiving cavity 124.

[0089] Optionally, the receiving rib 123 includes a first receiving rib 181 and a second receiving rib 182. The extending direction of the first receiving rib 181 intersects with the extending direction of the second receiving rib 182 to form the receiving cavity 124. Thus, the structure of the receiving rib 123 is simple.

[0090] Optionally, the extending direction of the first receiving rib 181 is perpendicular to that of the second receiving rib 182. Specifically, the first receiving rib 181 extends along the width direction of the insulating partition 120. The length direction of the second receiving rib 182 is parallel to the length direction of the insulating partition 120. The receiving rib 123 is configured as a circumferentially closed structure. The thickness direction of the insulating partition 120 is parallel to the length direction of the battery. The width direction of the insulating partition 120 is substantially parallel to the thickness direction of the battery. The length direction of the insulating partition 120 is parallel to the width direction of the battery.

[0091] Please continue to refer to Figures 6 to 9 , the cover plate device further includes a conductive member 130. The conductive member 130 can be a rectangular plate member. The conductive member 130 is a metal member. The part of the conductive member 130 located on the insulating partition 120 is on the side away from the cover plate main body assembly 110. In this way, the insulating partition 120 separates the cover plate main body assembly 110 and the conductive member 130, preventing the conductive member 130 from contacting and being electrically connected to the cover plate main body assembly 110. The conductive member 130 is used for electrically connecting the tab of the battery cell. In this way, the contact area between the tab of the battery cell and the conductive member 130 is large, facilitating the connection.

[0092] The external dimension of the conductive member 130 is slightly smaller than the dimension of the receiving cavity 124. In this way, the dimension of the conductive member 130 corresponds to that of the receiving cavity 124 of the insulating partition 120 connected thereto. The conductive member 130 is located in the receiving cavity 124 and does not protrude from the receiving cavity 124. In this way, it is convenient to install the conductive member 130. In addition, the first receiving rib 181 is located on the side of the conductive member 130 along the length direction of the insulating partition 120. The second receiving rib 182 is located on the side of the conductive member 130 along the width direction of the insulating partition 120. The first receiving rib 181 and the second receiving rib 182 can block the conductive member 130, thereby positioning the conductive member 130, so that the insulating through hole 128 and the mounting hole 133 described later are substantially coaxial, and further facilitating the penetration of the conductive post 140 through the insulating through hole 128 described later. In addition, the insulating partition 120 can protect the conductive member 130.

[0093] As Figures 6 to 9As shown, the insulating separator 120 has an insulating through-hole 128 communicating with the accommodating cavity 124. The cover device further includes a conductive post 140. The conductive post 140 can be a metal part. The conductive post 140 passes through the cover through-hole 173 of the cover body assembly 110 (passing through the first cover through-hole 112, the second cover through-hole 115 and the main body through-hole 172) and the insulating through-hole 128 of the insulating separator 120. The conductive post 140 is electrically connected (e.g., welded to) the conductive member 130 to connect two battery cells in series. In this way, in a battery of the same volume, the voltage of the battery including the first battery cell and the second battery cell can be increased. At the same battery voltage, more battery cells can be added, thereby increasing the battery capacity.

[0094] In this embodiment, the cover device connects two battery cell cases and connects two battery cells in series to increase the voltage of the battery; the provision of the accommodating cavity 124 facilitates the installation and positioning of the conductive member 130; in addition, the accommodating cavity 124 can protect the conductive member 130; the cover body assembly 110 includes the first cover body 111, the second cover body 114 and the main body insulating member 171, which avoids the electrical connection between the first cover body 111 and the second cover body 114, thereby avoiding the electrical connection between the first battery cell case 101 and the second battery cell case 102, and further reducing the possibility of battery short circuit.

[0095] Optionally, the conductive post 140 passes through the mounting hole 133 behind the conductive member 130. Thus, it is convenient to install the conductive post 140. It can be understood that in an embodiment not shown, the conductive post may not pass through the conductive member, as long as the part of the conductive post located on the side of the conductive member can electrically connect the conductive member.

[0096] Optionally, as Figures 6 to 9 shown, the insulating separator 120 includes a first insulating separator 121 and a second insulating separator 122. The first insulating separator 121 is located on one side of the cover body assembly 110. The second insulating separator 122 is located on the other side of the cover body assembly 110.

[0097] The conductive member 130 includes a first conductive member 131 and a second conductive member 132. The first conductive member 131 is located on the side of the part of the first insulating separator 121 away from the cover body assembly 110. The first conductive member 131 is located in the accommodating cavity 124 of the first insulating separator 121. The first conductive member 131 is used to connect the positive electrode tab of the first battery cell.

[0098] The second conductive member 132 is located on the side of the portion of the second insulating partition member 122 away from the cover plate main body assembly 110. The second conductive member 132 is located within the accommodation cavity 124 of the second insulating partition member 122. The second conductive member 132 is used to connect to the negative electrode tab of the second battery cell. In this way, the positive electrode tab of the first battery cell is electrically connected to the negative electrode tab of the second battery cell through the first conductive member 131, the conductive column 140, and the second conductive member 132, thereby connecting the first battery cell and the second battery cell in series.

[0099] Optionally, as Figure 6 shown, an expansion rib 125 is provided on the surface of the insulating partition member 120 away from the cover plate main body assembly 110. The expansion rib 125 protrudes along the thickness direction of the insulating partition member 120. The expansion rib 125 is connected to the first accommodation rib 181 to form an expansion groove 126. The expansion groove 126 and the accommodation cavity 124 are spaced apart. Along the length direction of the insulating partition member 120, the expansion rib 125 is located at the end of the insulating partition member 120. In this way, when the cover plate main body assembly 110 is connected to the battery cell housing, the expansion groove 126 communicates with the internal cavity of the battery cell housing, and thus the battery cell housing can accommodate more electrolyte. In addition, the provision of the expansion groove 126 can reduce the weight of the insulating partition member 120. Optionally, please continue to refer to Figure 6 , the expansion rib 125 is recessed along the width direction of the insulating partition member 120 to form a mounting groove 127. Thereby, during the production of the battery, the insulating partition member 120 can be positioned through the mounting groove 127. In addition, the insulating partition member 120 has high strength.

[0100] As Figure 6 , Figure 8 and Figure 9 shown, the conductive member 130 has a mounting hole 133. The mounting hole 133 includes a first hole section 134 and a second hole section 135. Along the axial direction of the mounting hole 133, the first hole section 134 and the second hole section 135 are arranged in sequence. The first hole section 134 communicates with the second hole section 135. The inner diameter of the first hole section 134 is larger than the inner diameter of the second hole section 135. The first hole section 134 is located on the side of the second hole section 135 away from the cover plate main body assembly 110. The inner diameter of the second hole section 135 is slightly larger than the outer diameter of the main body 141 of the conductive column 140 described later. The main body 141 of the conductive column 140 described later passes through the second hole section 135. The end face of the main body 141 is substantially flush with the transition surface between the first hole section 134 and the second hole section 135. In this way, the conductive column 140 and the conductive member 130 can be welded within the first hole section 134, preventing the welding scar from protruding to the side of the conductive member 130 away from the cover plate main body assembly 110, and thus avoiding affecting the welding of the electrode tab and the conductive member 130.

[0101] As Figure 9As shown, the conductive post 140 includes a body 141 and an annular flange 142. The annular flange 142 is configured to radially extend and protrude outward from the outer peripheral surface of the body 141. The annular flange 142 is located between the two ends of the conductive post 140. The body 141 passes through the first conductive member 131 and the second conductive member 132. Along the axial direction of the body 141 (i.e., the axial direction of the conductive post 140), the annular flange 142 is located between the first conductive member 131 and the cover body assembly 110. The annular flange 142 abuts against the side surface of the first conductive member 131 close to the cover body assembly 110. Thus, the annular flange 142 can define the relative position between the conductive post 140 and the first conductive member 131, facilitating the installation operation of the conductive post 140 passing through the first conductive member 131.

[0102] Optionally, as Figures 6 to 9 shown, the cover device further includes a seal 150. The seal 150 can be made of rubber material. The seal 150 is a sleeve-like structure. The central through hole 153 of the seal 150 is sleeved on the body 141. The seal 150 is located between the cover body assembly 110 and the conductive post 140 to seal the gap between the cover body assembly 110 and the conductive post 140. Thus, the first battery cell and the second battery cell can be separated, preventing the electrolyte in the two battery cell housings from flowing into each other.

[0103] As Figure 9 shown, the seal 150 includes a first section 151 and a second section 152. The outer diameter of the first section 151 is smaller than the outer diameter of the second section 152. Along the axial direction of the body 141, the second section 152 is located on the side of the cover body assembly 110.

[0104] Specifically, the cover device includes two seals 150. The two seals 150 include a first seal 155 and a second seal 156. The second section 152 of the first seal 155 is located between the annular flange 142 and the side surface of the cover body assembly 110. Thus, the annular flange 142 can press the second section 152 of the first seal 155 against the side surface of the cover body assembly 110, thereby sealing the gap between the annular flange 142 and the side surface of the cover body assembly 110.

[0105] The second section 152 of the second seal 156 is located between the second insulating partition 122 and the side surface of the cover body assembly 110. Thus, the second insulating partition 122 can press the second section 152 of the second seal 156 against the side surface of the cover body assembly 110, thereby sealing the gap between the second insulating partition 122 and the side surface of the cover body assembly 110.

[0106] Optionally, as Figure 8 and Figure 9As shown, the conductive post 140 includes a first portion 143 and a second portion 144. The first portion 143 is configured as an aluminum portion made of aluminum material. The second portion 144 is configured as a copper portion made of copper material. In this way, the battery can be a lithium battery. The positive electrode tab of the lithium battery cell is an aluminum tab, and the negative electrode tab is a copper tab. The second portion 144 is used to connect to the copper tab of the battery cell. The first portion 143 is used to connect to the aluminum tab of the battery cell.

[0107] Further, along the axial direction of the conductive post 140, the connection portion between the first portion 143 and the second portion 144 is located between the two ends of the first section 151 of the first seal 155. In this way, along the axial direction of the conductive post 140, the first section 151 of the first seal 155 covers the connection portion between the first portion 143 and the second portion 144. Thereby, it is possible to prevent the electrolyte from flowing to the connection portion between the first portion 143 and the second portion 144, and further prevent an electrochemical reaction from occurring between the first portion 143 and the second portion 144.

[0108] It can be understood that in an embodiment not shown, along the axial direction of the conductive post, the connection portion between the first portion and the second portion can be located between the two ends of the first section of the second seal. In this way, along the axial direction of the conductive post, the first section of the second seal covers the connection portion between the first portion 143 and the second portion.

[0109] It can be understood that in an embodiment not shown, the conductive post is made of aluminum material. In this way, the battery can be a sodium battery. Both the positive electrode tab and the negative electrode tab of the sodium battery are aluminum parts.

[0110] Optionally, as shown in 6 and Figure 9 As shown, the first cover body 111 has a first cover positioning portion 113. The main body insulator 171 has a first main body positioning portion 173. The first main body positioning portion 173 corresponds to the first cover positioning portion 113. One of the first cover positioning portion 113 and the first main body positioning portion 173 extends into the other. Thereby, it is convenient to position the relative position between the first cover body 111 and the main body insulator 171.

[0111] Specifically, the surface of the first cover body 111 close to the main body insulator 171 is recessed to form the first cover positioning portion 113. The surface of the main body insulator 171 close to the first cover body 111 extends and protrudes to form the first main body positioning portion 173. The first main body positioning portion 173 extends into the first cover positioning portion 113. Thereby, the strength of the main body insulator 171 is high.

[0112] Further, the first cover positioning portion 113 and the first main body positioning portion 173 are configured as a corresponding stepped structure. Thereby, the structures of the first cover positioning portion 113 and the first main body positioning portion 173 are simple.

[0113] It can be understood that in an embodiment not shown, it is also possible that the first cover plate positioning portion extends into the first main body positioning portion.

[0114] Optionally, as shown in FIGS. 6 and Figure 9 As shown, the second cover plate main body 114 has a second cover plate positioning portion 116. The main body insulating member 171 has a second main body positioning portion 174. The second main body positioning portion 174 and the second cover plate positioning portion 116 correspond to each other. One of the second cover plate positioning portion 116 and the second main body positioning portion 174 extends into the other. Thereby, it is convenient to position the relative positions between the second cover plate main body 114 and the main body insulating member 171.

[0115] Specifically, the surface of the second cover plate main body 114 close to the main body insulating member 171 is recessed to form the second cover plate positioning portion 116. The surface of the main body insulating member 171 close to the second cover plate main body 114 extends and protrudes to form the second main body positioning portion 174. The second main body positioning portion 174 extends into the second cover plate positioning portion 116. Thereby, the strength of the main body insulating member 171 is high.

[0116] Furthermore, the second cover plate positioning portion 116 and the second main body positioning portion 174 are configured as a corresponding stepped structure. Thereby, the structures of the second cover plate positioning portion 116 and the second main body positioning portion 174 are simple.

[0117] It can be understood that in an embodiment not shown, it is also possible that the second cover plate positioning portion extends into the second main body positioning portion.

[0118] When assembling the cover plate device, the first cover plate body 111, the second cover plate body 114 and the main body insulating member 171 are connected to form the cover plate main body assembly 110; the conductive column 140 and the first conductive member 131 are welded into one body; then the central through hole 153 of the first sealing member 155 is sleeved on the body 141 of the conductive column 140; the first conductive member 131 is set in the accommodating cavity 124 of the first insulating partition 121, so that the conductive column 140 and the first sealing member 155 are inserted into the first insulating partition. The cover plate through hole 173 of the cover plate main body assembly 110 is sleeved on the body 141 of the conductive column 140 and abutted against the second section 152 of the first sealing member 155 to press the second section 152 of the first sealing member 155 to the annular flange 142; the central through hole 153 of the second sealing member 156 is sleeved on the body 141 of the conductive column 140 so that the first section 151 of the second sealing member 156 extends into the cover plate through hole 173; the second insulating spacer 122 The insulating through hole 128 of the cover plate main body assembly 110 is sleeved on the body 141 of the conductive column 140 from the side away from the first conductive member 131, and is sleeved on the second section 152 of the second sealing member 156; the second conductive member 132 is arranged in the accommodating cavity 124 of the second insulating partition 122, so that the mounting hole 133 of the second conductive member 132 is sleeved on the body 141 of the conductive column 140 and presses the second section 152 of the second sealing member 156; then the first conductive member 131 and the second conductive member are squeezed. The two opposite sides of the member 132 are connected so that the second section 152 of the second sealing member 156 presses the cover plate main body assembly 110, and then the contact portion between the conductive column 140 and the second conductive member 132 is riveted to expand the conductive column 140; after the conductive column 140 expands, it holds the second conductive member 132 tightly so that the second conductive member 132 and the conductive column 140 will not loosen; then the conductive column 140 and the second conductive member 132 are welded to fuse the connection between the conductive column 140 and the second conductive member 132 into one.

[0119] The utility model also provides a battery, which includes the aforementioned cover plate device.

[0120] In this embodiment, the battery includes the aforementioned cover device, which connects the two battery shells and connects the two battery cells in series to increase the voltage of the battery; the setting of the accommodating chamber 124 facilitates the installation and positioning of the conductive member 130; in addition, the accommodating chamber 124 can protect the conductive member 130; the cover body assembly 110 includes a first cover body 111, a second cover body 114 and a main body insulating member 171, which avoids electrical connection between the first cover body 111 and the second cover body 114, thereby avoiding electrical connection between the first battery shell 101 and the second battery shell 102, thereby reducing the possibility of battery short circuit.

[0121] Please return Figures 1 to 3, the battery further includes end covers. The end covers include a positive cover 160 and a negative cover 161. The first cell case 101 and the second cell case 102 form a battery case. Both ends of the battery case in the length direction of the battery have end openings. The positive cover 160 is connected to the cell housing to cover one end opening. The negative cover 161 is connected to the cell housing to cover the other end opening. The positive cover 160 is provided with the positive electrode of the battery. The negative cover 161 is provided with the negative electrode of the battery. Among them, at least one of the positive cover 160 and the negative cover 161 is provided with a liquid injection hole 162. At least one of the positive cover 160 and the negative cover 161 is provided with an explosion-proof valve 163.

[0122] The present utility model also provides a battery pack. The battery pack includes the aforementioned battery.

[0123] In this embodiment, the battery pack includes the aforementioned battery, the battery includes the aforementioned cover device, the cover device connects the two cell cases and connects the two cells in series to increase the voltage of the battery; the provision of the accommodating cavity 124 facilitates the installation and positioning of the conductive member 130; in addition, the accommodating cavity 124 can protect the conductive member 130; the cover body assembly 110 includes the first cover body 111, the second cover body 114 and the body insulating member 171, which avoids the electrical connection between the first cover body 111 and the second cover body 114, thereby avoiding the electrical connection between the first cell case 101 and the second cell case 102, and further reducing the possibility of battery short circuit.

[0124] The present utility model also provides a battery pack. The battery pack includes the aforementioned battery pack.

[0125] In this embodiment, the battery pack includes the aforementioned battery pack, the battery pack includes the aforementioned battery, the battery includes the aforementioned cover device, the cover device connects the two cell cases and connects the two cells in series to increase the voltage of the battery; the provision of the accommodating cavity 124 facilitates the installation and positioning of the conductive member 130; in addition, the accommodating cavity 124 can protect the conductive member 130; the cover body assembly 110 includes the first cover body 111, the second cover body 114 and the body insulating member 171, which avoids the electrical connection between the first cover body 111 and the second cover body 114, thereby avoiding the electrical connection between the first cell case 101 and the second cell case 102, and further reducing the possibility of battery short circuit.

[0126] The present utility model also provides an electrical device. The electrical device includes the aforementioned battery pack. The electrical device can be a vehicle.

[0127] In this embodiment, the electrical device includes the aforementioned battery pack, the battery pack includes the aforementioned battery module, the battery module includes the aforementioned battery, the battery includes the aforementioned cover plate device, the cover plate device connects two battery cell cases and connects two battery cells in series to increase the voltage of the battery; the provision of the accommodation cavity 124 facilitates the installation and positioning of the conductive member 130; in addition, the accommodation cavity 124 can protect the conductive member 130; the provision of the cover plate main body assembly 110 including the first cover plate main body 111, the second cover plate main body 114 and the main body insulating member 171 prevents the first cover plate main body 111 from being electrically connected to the second cover plate main body 114, thereby preventing the first battery cell case 101 from being electrically connected to the second battery cell case 102, and further reducing the possibility of battery short circuit.

[0128] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model to the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

[0129] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present utility model. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. Terms such as "component" that appear herein can represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" that appear herein can represent either a component being directly attached to another component or a component being attached to another component through an intermediate member. Features described in one embodiment herein can be applied alone or in combination with other features to another embodiment, unless the feature is not applicable or otherwise stated in that other embodiment.

Claims

1. A cover plate device, the cover plate device is used to connect two battery cells in series, the battery cells are wrapped with a battery cell shell, characterized in that: The cover plate device comprises: A cover plate main body assembly, the cover plate main body assembly comprising: A first cover plate body, the first cover plate body being used to be connected to one of the battery cell shells; A second cover plate body, the second cover plate body being used to be connected to another of the battery cell shells; a main body insulating member, the main body insulating member being located between the first cover plate main body and the second cover plate main body; An insulating spacer is located on the side of the cover plate main body component, and a surface of the insulating spacer away from the cover plate main body component has accommodating ribs that form an accommodating cavity.

2. The cover device according to claim 1, characterized in that: The cover plate device also includes: A conductive member, the conductive member is located in the accommodating cavity; A conductive column, the conductive column is arranged through the cover plate main body component and the insulating separator; The conductive member is used to connect the tabs of the battery cell, and the conductive column is electrically connected to the conductive member to connect the two battery cells in series.

3. The cover device according to claim 2, characterized in that: The insulating spacer comprises a first insulating spacer and a second insulating spacer, wherein the first insulating spacer and the second insulating spacer are respectively located on two sides of the cover plate main body assembly; The conductive member includes a first conductive member and a second conductive member, the first conductive member is located in the accommodating cavity of the first insulating partition for connecting the positive electrode of one of the battery cells, and the second conductive member is located in the accommodating cavity of the second insulating partition for connecting the negative electrode of another of the battery cells.

4. The cover device according to claim 1, characterized in that: A surface of the insulating spacer away from the cover plate main body assembly is provided with an expansion rib, the expansion rib is connected to the accommodating rib to form an expansion groove, and the expansion groove is spaced apart from the accommodating cavity.

5. The cover device according to claim 4, characterized in that: The capacity expansion rib is recessed along the width direction of the insulating spacer to form a mounting groove.

6. The cover device according to claim 2, characterized in that: The conductive part has a mounting hole, which includes a first hole section and a second hole section that are interconnected. The inner diameter of the first hole section is larger than the inner diameter of the second hole section. The first hole section is located on a side of the second hole section that is away from the cover plate main body component, and the conductive column is passed through the second hole section.

7. The cover device according to claim 3, characterized in that: The conductive column includes a body and an annular flange formed by radially extending outward from the outer circumferential surface of the body, the annular flange is located between the two ends of the conductive column, the body is penetrated by the first conductive member and the second conductive member, and the annular flange abuts against the first conductive member.

8. The cover device according to claim 2, characterized in that: The cover plate device further comprises a sealing member, which is sleeved on the conductive column and located between the cover plate main body component and the conductive column.

9. The cover device according to claim 8, characterized in that: The sealing member includes a first section and a second section, the outer diameter of the second section is greater than the outer diameter of the first section, and along the axial direction of the conductive column, the second section is located on the side of the cover plate main body assembly.

10. The cover device according to claim 8, characterized in that: The conductive pillar includes a first portion and a second portion, the first portion includes a copper portion, and the second portion includes an aluminum portion.

11. The cover device according to claim 10, characterized in that: Along the axial direction of the conductive column, the sealing member covers a connection between the first portion and the second portion.

12. The cover device according to claim 2, characterized in that: The conductive pillar is an aluminum part.

13. The cover device according to claim 1, characterized in that: The first cover plate body has a first cover plate positioning portion, the main body insulating member has a first main body positioning portion corresponding to the first cover plate positioning portion, and one of the first cover plate positioning portion and the first main body positioning portion extends into the other.

14. The cover device according to claim 1, characterized in that: The second cover plate body has a second cover plate positioning portion, the main body insulating member has a second body positioning portion corresponding to the second cover plate positioning portion, and one of the second cover plate positioning portion and the second body positioning portion extends into the other.

15. The cover device according to claim 1, characterized in that: The accommodating ribs include a first accommodating rib and a second accommodating rib to enclose the accommodating cavity, and an extending direction of the first accommodating rib and an extending direction of the second accommodating rib intersect.

16. A battery, characterized in that: The battery comprises a cover plate device according to any one of claims 1 to 15.

17. The battery according to claim 16, characterized in that The battery has an end cover plate, and the end cover plate is provided with at least one of a liquid injection hole and an explosion-proof valve.

18. A battery pack, characterized in that: The battery pack comprises the battery according to claim 16 or 17.

19. A battery pack, characterized in that: The battery pack includes the battery pack according to claim 18.

20. An electrical equipment, characterized in that: The electric device comprises the battery pack according to claim 19.

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