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 and an insulating separator; the cover plate main body is connected to a battery cell shell; the insulating separator is located on the side of the cover plate main body, and the surface, away from the cover plate main body, of the insulating separator is provided with an accommodating rib to 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 piece; in addition, the accommodating cavity can protect the conductive piece.

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 an 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 for connecting and wrapping the battery cell case of the battery cell, an insulating partition member for 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 an 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 cell includes a battery cell case. The cover plate device includes:

[0007] A cover plate main body for connecting to the battery cell case;

[0008] An insulating partition member located on the side of the cover plate main body. The surface of the insulating partition member away from the cover plate main body has a receiving rib to enclose a receiving cavity.

[0009] According to the cover plate device of the 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 setting of the receiving cavity facilitates the installation and positioning of the conductive member; in addition, the receiving cavity can protect the conductive member.

[0010] Optionally, the cover plate device further includes:

[0011] A conductive member located in the receiving cavity;

[0012] A conductive post is inserted through the cover plate main body and the insulating partition member.

[0013] Among them, the conductive member is used to connect the tab of the battery cell, and the conductive post is electrically connected to the conductive member to connect two battery cells in series.

[0014] 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;

[0015] 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 member for connecting the positive electrode of one battery cell, and the second conductive member is located in the accommodating cavity of the second insulating partition member for connecting the negative electrode of the other battery cell.

[0016] Optionally, a rib for expansion is provided on the surface of the insulating partition member away from the cover plate main body, and the rib for expansion is connected to the rib for accommodation to form a groove for expansion, and the groove for expansion is spaced apart from the accommodating cavity.

[0017] Optionally, the rib for expansion is recessed along the width direction of the insulating partition member to form a mounting groove.

[0018] 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 that 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, and the conductive post is inserted through the second hole section.

[0019] Optionally, the conductive post includes a main body and a ring-shaped flange formed by radially protruding outward from the outer peripheral surface of the main body. The ring-shaped flange is located between the two ends of the conductive post. The main body is inserted through the first conductive member and the second conductive member, and the ring-shaped flange abuts against the first conductive member.

[0020] Optionally, the second insulating partition member has a positioning protrusion, and the positioning protrusion is sleeved on the conductive post and inserted through the cover plate main body.

[0021] 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 and the conductive post.

[0022] Optionally, the sealing member includes a first section and a second section, and the outer diameter of the second section is larger than that of the first section. Along the axial direction of the conductive post, the second section is located on the side of the cover plate main body.

[0023] Optionally, the first section abuts against the positioning protrusion.

[0024] Optionally, the conductive post includes a first part and a second part. The first part includes a copper part, and the second part includes an aluminum part.

[0025] Optionally, along the axial direction of the conductive post, the sealing member covers the connection part of the first part and the second part.

[0026] Optionally, the conductive post is an aluminum part.

[0027] Optionally, the receiving ribs include a first receiving rib and a second receiving rib to form a receiving cavity, and the extending directions of the first receiving rib and the second receiving rib intersect.

[0028] The present utility model also provides a battery, and the battery includes the aforementioned cover plate device.

[0029] For the battery according to the present utility model, 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 receiving cavity facilitates the installation and positioning of the conductive member; in addition, the receiving cavity can protect the conductive member.

[0030] 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.

[0031] The present utility model also provides a battery pack, and the battery pack includes the aforementioned battery.

[0032] For the battery pack according to 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 provision of the receiving cavity facilitates the installation and positioning of the conductive member; in addition, the receiving cavity can protect the conductive member.

[0033] The present utility model also provides a battery pack, and the battery pack includes the aforementioned battery pack.

[0034] For the battery pack according to 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 provision of the receiving cavity facilitates the installation and positioning of the conductive member; in addition, the receiving cavity can protect the conductive member.

[0035] The present utility model also provides an electrical device, and the electrical device includes the aforementioned battery pack.

[0036] For the electrical device according to 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 provision of the receiving cavity facilitates the installation and positioning of the conductive member; in addition, the receiving cavity can protect the conductive member. Description of the Drawings

[0037] 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 specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present utility model, and thus should not be considered as limiting its protection scope. The present utility model will be described and explained with additional features and details through the drawings.

[0038] Figure 1 Schematic perspective view of a battery using a cover plate device according to a preferred embodiment of the present utility model;

[0039] Figure 2 For use Figure 1 Front view schematic of a battery using the cover plate device;

[0040] Figure 3 For use Figure 1 Top view schematic of a battery using the cover plate device;

[0041] Figure 4 For use Figure 2 Partial enlarged schematic at A of a battery using the cover plate device;

[0042] Figure 5 For Figure 1 Schematic perspective view of the cover plate device;

[0043] Figure 6 For Figure 5 Exploded schematic of the cover plate device;

[0044] Figure 7 For Figure 5 Top view schematic of the cover plate device;

[0045] Figure 8 For Figure 7 Cross-sectional schematic at B-B of the cover plate device; and

[0046] Figure 9 For Figure 7 Cross-sectional schematic at C-C of the cover plate device.

[0047] Explanation of reference numerals

[0048] 101: First battery cell case 102: Second battery cell case

[0049] 110: Cover plate main body 111: Cover plate through hole

[0050] 120: Insulating separator 121: First insulating separator

[0051] 122: Second insulating separator 123: Accommodating rib

[0052] 124: Accommodating cavity 125: Expanding rib

[0053] 126: Expansion slot 127: Installation slot

[0054] 128: Insulating through hole 129: Positioning protrusion

[0055] 130: Conductive part 131: First conductive part

[0056] 132: Second conductive part 133: Installation hole

[0057] 134: First hole section 135: Second hole section

[0058] 140: Conductive column 141: Body

[0059] 142: Annular flange 143: First part

[0060] 144: Second part 150: Sealing part

[0061] 151: First section 152: Second section

[0062] 153: Central through hole 160: Positive electrode cover plate

[0063] 161: Negative electrode cover plate 162: Liquid injection hole

[0064] 163: Explosion-proof valve 171: First accommodation rib

[0065] 172: Second accommodation rib Detailed implementation mode

[0066] 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 technical features well known to those skilled in the art are not described.

[0067] 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.

[0068] 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.

[0069] 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 as follows. However, in addition to these detailed descriptions, the present utility model may also have other embodiments.

[0070] 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.

[0071] 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.

[0072] Please refer to Figures 1 to 9 , the cover plate device includes a cover plate main body 110. The cover plate main body 110 can be a rectangular plate member. The cover plate main body 110 can be a metal member. For example, an aluminum alloy member. The battery cell case can be a metal member. (For example, an aluminum alloy member). 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 disposed in the internal cavity of the battery cell case.

[0073] 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 110 is located between the first battery cell case 101 and the second battery cell case 102. The outer edge of the cover plate main body 110 is circumferentially connected (such as welded) to the edge of the connection opening of the first battery cell case 101, and the outer edge of the cover plate main body 110 is also circumferentially connected to the edge of the connection opening of the second battery cell case 102. In this way, the cover plate main body 110 covers the connection openings of the first battery cell case 101 and the second battery cell case 102. The connection strength between the cover plate main body 110 and the two battery cell cases is high. The sealing performance at the connection between the cover plate main body 110 and the two battery cell cases is strong.

[0074] As Figures 5 to 9As shown, the cover plate device further includes an insulating separator 120. The insulating separator 120 can be a rectangular plate member. The insulating separator 120 is made of an insulating material. For example, the insulating separator 120 can be a plastic part. The insulating separator 120 is located on the side of the cover plate body 110. The insulating separator 120 is connected to the cover plate body 110. The projection of the insulating separator 120 on the projection plane covers at least part of the projection of the cover plate body 110 on the projection plane to prevent the electrolyte in the cell case from contacting the cover plate body 110. The projection plane is perpendicular to the axial direction of the conductive post 140 described later. The cover plate body 110 has a cover plate through hole 111.

[0075] As Figures 6 to 9 shown, the surface of the insulating separator 120 away from the cover plate body 110 has a receiving rib 123. The receiving rib 123 extends and protrudes along the thickness direction of the insulating separator 120. The receiving rib 123 forms a receiving cavity 124.

[0076] Optionally, the receiving rib 123 includes a first receiving rib 171 and a second receiving rib 172. The extending direction of the first receiving rib 171 intersects with the extending direction of the second receiving rib 172 to form the receiving cavity 124. Thus, the structure of the receiving rib 123 is simple.

[0077] Optionally, the extending direction of the first receiving rib 171 is perpendicular to the extending direction of the second receiving rib 172. Specifically, the first receiving rib 171 extends along the width direction of the insulating separator 120. The length direction of the second receiving rib 172 is parallel to the length direction of the insulating separator 120. The receiving rib 123 is configured as a circumferentially closed structure. The thickness direction of the insulating separator 120 is parallel to the length direction of the battery. The width direction of the insulating separator 120 is substantially parallel to the thickness direction of the battery. The length direction of the insulating separator 120 is parallel to the width direction of the battery.

[0078] 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 part. The conductive member 130 is located on the side of the part of the insulating separator 120 away from the cover plate body 110. In this way, the insulating separator 120 separates the cover plate body 110 and the conductive member 130, preventing the conductive member 130 from contacting and being electrically connected to the cover plate body 110. The conductive member 130 is used to electrically connect 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.

[0079] The external dimensions of the conductive member 130 are slightly smaller than those of the accommodation cavity 124. In this way, the dimensions of the conductive member 130 correspond to those of the accommodation cavity 124 of the insulating partition member 120 connected thereto. The conductive member 130 is located within the accommodation cavity 124 and does not protrude from the accommodation cavity 124. This facilitates the installation of the conductive member 130. In addition, the first accommodation rib 171 is located on the side of the conductive member 130 along the length direction of the insulating partition member 120, and the second accommodation rib 172 is located on the side of the conductive member 130 along the width direction of the insulating partition member 120. The first accommodation rib 171 and the second accommodation rib 172 can block the conductive member 130, thereby positioning the conductive member 130 so that the subsequent insulating through hole 128 and the mounting hole 133 are substantially coaxial, and further facilitating the penetration of the subsequent conductive column 140 through the subsequent insulating through hole 128. In addition, the insulating partition member 120 can protect the conductive member 130.

[0080] As Figures 6 to 9 shown, the insulating partition member 120 has an insulating through hole 128 communicating with the accommodation cavity 124. The cover device further includes a conductive column 140, which can be a metal member. The conductive column 140 penetrates through the cover through hole 111 of the cover body 110 and the insulating through hole 128 of the insulating partition member 120. The conductive column 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.

[0081] 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 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.

[0082] Optionally, the conductive column 140 penetrates through the subsequent mounting hole 133 of the conductive member 130. This facilitates the installation of the conductive column 140. It can be understood that in an embodiment not shown, the conductive column may not penetrate through the conductive member, as long as the conductive column is located on the side of the part of the conductive member and can be electrically connected to the conductive member.

[0083] Optionally, as Figures 6 to 9 shown, the insulating partition member 120 includes a first insulating partition member 121 and a second insulating partition member 122. The first insulating partition member 121 is located on one side of the cover body 110, and the second insulating partition member 122 is located on the other side of the cover body 110.

[0084] 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 a part of the first insulating partition 121 away from the cover plate body 110. The first conductive member 131 is located in the accommodation cavity 124 of the first insulating partition 121. The first conductive member 131 is used to connect the positive electrode tab of the first battery cell.

[0085] The second conductive member 132 is located on the side of a part of the second insulating partition 122 away from the cover plate body 110. The second conductive member 132 is located in the accommodation cavity 124 of the second insulating partition 122. The second conductive member 132 is used to connect 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, so as to connect the first battery cell and the second battery cell in series.

[0086] Optionally, as Figure 6 shown, an expansion rib 125 is provided on the surface of the insulating partition 120 away from the cover plate body 110. The expansion rib 125 extends and protrudes along the thickness direction of the insulating partition 120. The expansion rib 125 is connected to the first accommodation rib 171 to form an expansion groove 126. The expansion groove 126 is spaced apart from the accommodation cavity 124. Along the length direction of the insulating partition 120, the expansion rib 125 is located at the end of the insulating partition 120. In this way, when the cover plate body 110 is connected to the battery cell case, the expansion groove 126 communicates with the internal cavity of the battery cell case, and thus the battery cell case can accommodate more electrolyte. In addition, the setting of the expansion groove 126 can reduce the weight of the insulating partition 120.

[0087] Optionally, please continue to refer to Figure 6 , the expansion rib 125 is recessed along the width direction of the insulating partition 120 to form a mounting groove 127. Thus, during the production of the battery, the insulating partition 120 can be positioned through the mounting groove 127. In addition, the insulating partition 120 has high strength.

[0088] As Figure 6 、 Figure 8 and Figure 9As 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 that 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 body 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 post 140 described later. The main body 141 of the conductive post 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 post 140 and the conductive member 130 can be welded in the first hole section 134, preventing the welding scar from protruding to the side of the conductive member 130 away from the cover plate body 110, and thus avoiding affecting the welding between the tab and the conductive member 130.

[0089] As Figure 9 shown, the conductive post 140 includes a main 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 main body 141. The annular flange 142 is located between the two ends of the conductive post 140. The main body 141 passes through the first conductive member 131 and the second conductive member 132. Along the axial direction of the main 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 plate body 110. The annular flange 142 abuts against the side of the first conductive member 131 close to the cover plate body 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.

[0090] Please continue to refer to Figure 9 , the second insulating partition 122 has a positioning protrusion 129. The positioning protrusion 129 is sleeved on the main body 141. The positioning protrusion 129 passes through the cover plate body 110. In this way, the cover plate body 110 and the main body 141 of the conductive post 140 can be separated. In addition, the second insulating partition 122 has high strength.

[0091] Optionally, as Figures 6 to 9 shown, the cover plate 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 main body 141. The seal 150 is located between the cover plate body 110 and the conductive post 140 to seal the gap between the cover plate body 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 cases from flowing into each other.

[0092] As Figure 9As 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 that of the second section 152. Along the axial direction of the main body 141, the second section 152 is located between the cover plate main body 110 and the annular flange 142. Thus, the annular flange 142 can press the second section 152 against the side surface of the cover plate main body 110, thereby sealing the gap between the annular flange 142 and the side surface of the cover plate main body 110.

[0093] Furthermore, the first section 151 abuts against the positioning protrusion 129. Thus, the positioning protrusion 129 and the annular flange 142 press the seal 150, which can further improve the sealing performance.

[0094] Optionally, as Figure 8 and Figure 9 shown, the conductive post 140 includes a first part 143 and a second part 144. The first part 143 is configured as an aluminum part made of aluminum material. The second part 144 is configured as a copper part 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 part 144 is used to connect with the copper tab of the battery cell. The first part 143 is used to connect with the aluminum tab of the battery cell.

[0095] Furthermore, along the axial direction of the conductive post 140, the connection part of the first part 143 and the second part 144 is located between the two ends of the first section 151. In this way, along the axial direction of the conductive post 140, the first section 151 of the seal 150 covers the connection part of the first part 143 and the second part 144. Thus, it can be avoided that the electrolyte flows to the connection part of the first part 143 and the second part 144, and further avoid the electro-chemical reaction between the first part 143 and the second part 144.

[0096] 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.

[0097] It can be understood that in an embodiment not shown, the cover plate device may also include two seals. At this time, the second insulating partition has no positioning protrusion. One seal is located between the second insulating partition and the cover plate main body. The other seal is located between the annular flange and the cover plate main body.

[0098] When assembling the cover plate device, first weld the conductive post 140 and the first conductive member 131 into one body. Then, sleeved the central through hole 153 of the seal 150 on the body 141 of the conductive post 140. Place the first conductive member 131 in the accommodation cavity 124 of the first insulating partition 121, so that the conductive post 140 and the seal 150 pass through the insulating through hole 128 of the first insulating partition 121; sleeved the cover through hole 111 of the cover body 110 on the body 141 of the conductive post 140, and abut it against the second section 152 of the seal 150 to press the second section 152 against the annular flange 142; sleeved the insulating through hole 128 of the second insulating partition 122 on the body 141 of the conductive post 140 from the side of the cover body 110 away from the first conductive member 131, so that the positioning protrusion 129 extends into the cover through hole 111; place the second conductive member 132 in the accommodation 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 post 140; then squeeze the opposite two sides of the first conductive member 131 and the second conductive member 132, so that the positioning protrusion 129 presses against the free end of the first section 151 of the seal 150, and then rivet the contact part of the conductive post 140 and the second conductive member 132 to expand the conductive post 140; after the conductive post 140 expands, it tightly holds the second conductive member 132 so that the second conductive member 132 and the conductive post 140 will not become loose; then weld the conductive post 140 and the second conductive member 132 so that the connection part of the conductive post 140 and the second conductive member 132 fuses into one body.

[0099] The present utility model also provides a battery. The battery includes the aforementioned cover plate device.

[0100] In this embodiment, the battery includes the aforementioned cover plate device. The cover plate device is connected to 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.

[0101] 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 battery cell case 101 and the second battery 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 battery cell housing to cover one end opening. The negative cover 161 is connected to the battery 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.

[0102] The present utility model also provides a battery pack. The battery pack includes the aforementioned battery.

[0103] In this embodiment, 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 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.

[0104] The present utility model also provides a battery module. The battery module includes the aforementioned battery pack.

[0105] In this embodiment, the battery module 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 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.

[0106] The present utility model also provides an electrical device. The electrical device includes the aforementioned battery module. The electrical device can be a vehicle.

[0107] In this embodiment, the electrical device includes the aforementioned battery module. The battery module 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 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.

[0108] The present utility model has been described by the above embodiments. 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 within 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.

[0109] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill 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 "mounted" and "arranged" 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 cell includes a battery cell shell, characterized in that: The cover plate device comprises: A cover plate body, the cover plate body being used to be connected to the battery cell shell; The insulating spacer is located on the side of the cover body, and the surface of the insulating spacer away from the cover body has a containing rib to enclose a containing 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 provided through the cover plate body 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 body; 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 body is provided with a capacity expansion rib, the capacity expansion rib is connected to the accommodating rib to form a capacity expansion groove, and the capacity 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 connected to 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 a side of the second hole section away from the cover plate body, 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 3, characterized in that: The second insulating partition has a positioning protrusion, and the positioning protrusion is sleeved on the conductive column and penetrates the cover plate body.

9. The cover device according to claim 8, 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 body and the conductive column.

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

11. The cover device according to claim 10, characterized in that: The first section abuts against the positioning protrusion.

12. The cover device according to claim 9, 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.

13. The cover device according to claim 12, 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.

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

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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