Cover plate assembly and battery

Abstract

A cover plate assembly (100) and a battery. The cover plate assembly (100) comprises a mounting member (101) and a current collecting plate (105), wherein the mounting member (101) comprises a main body portion (102) and a blocking portion (103), a mounting side (104) being formed on the main body portion (102), and the blocking portion (103) being connected to the mounting side (104); and the current collecting plate (105) comprises a first connection portion (106), a first bend portion (107) and a second connection portion (108), which are connected in sequence, the first connection portion (106) being mounted on the mounting side (104), and the blocking portion (103) abutting against the side of the first bend portion (107) away from the main body portion (102), such that the first bend portion (107) is located between the main body portion (102) and the blocking portion (103).

Description

Cover assembly and battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 27, 2023, with application number 202323608544.X. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a cover assembly and a battery. Background Art

[0003] In related technologies, the cover assembly of the battery mainly includes a lower plastic part, a pole, a top cover and a current collecting plate, among which the current collecting plate is mainly used to connect the pole and the winding core. The current collecting plate generally includes a pole connecting section, a bending section and a winding core connecting section. During the installation process, the pole connecting section is first welded to the pole, and the current collecting plate is bent for the first time so that the bending section and the winding core connecting section are located below the pole connecting section. Then the second bending is performed so that the winding core connecting section is located below the bending section, which facilitates the connection between the winding core connecting section and the winding core. SUMMARY OF THE INVENTION

[0004] In the related art, during the first bending process of the collecting plate, the welding joints between the pole connecting section and the pole will be pulled. When the pulling force is too large, the collecting plate will be deformed and broken, and even the welding joints between the pole connecting section and the pole will be torn, resulting in the desoldering of the pole connecting section and the pole.

[0005] In a first aspect, the present application provides a cover plate assembly. The cover plate assembly includes:

[0006] The mounting member includes a main body portion and a blocking portion, wherein the main body portion is formed with a mounting side and the blocking portion is connected to the mounting side; and

[0007] The collecting plate includes a first connecting portion, a first bending portion and a second connecting portion connected in sequence. The first connecting portion is installed on the installation side, and the blocking portion abuts against the side of the first bending portion away from the main body portion so that the first bending portion is located between the main body portion and the blocking portion.

[0008] In a second aspect, the present application further provides a battery. The battery includes a cover assembly, the cover assembly including:

[0009] The mounting member includes a main body portion and a blocking portion, wherein the main body portion is formed with a mounting side and the blocking portion is connected to the mounting side; and

[0010] The collecting plate includes a first connecting portion, a first bending portion and a second connecting portion connected in sequence. The first connecting portion is installed on the installation side, and the blocking portion abuts against the side of the first bending portion away from the main body portion so that the first bending portion is located between the main body portion and the blocking portion. Beneficial effects

[0011] In the technical solution of the present application, the first connection part is configured to be connected to the pole of the battery, and the second connection part is configured to be connected to the winding core of the battery. After the first connection part is fixed to the main body, the current collecting disk needs to be bent. By setting a blocking part on the mounting part to cooperate with the bending part, due to the setting of the blocking part, the current collecting disk can only be bent at the first bending part, which can avoid pulling the first connection part or the second connection part during the bending process, causing the first connection part or the second connection part to be deformed and damaged, and unable to be welded normally; since the first connection part is connected to the main body, a pulling force will be generated on the first connection part during the bending process, and the blocking part can resist the pulling force generated during the bending process to prevent the first connection part from separating from the main body; similarly, the second connection part is connected to the winding core, and the winding core will generate a pulling force on the second connection part. The blocking part can resist part of the pulling force to prevent the current collecting disk from being pulled, deformed or even broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic structural diagram of a cover assembly provided by some possible implementations of the present application.

[0013] FIG2 is a schematic structural diagram of the mounting member in FIG1 .

[0014] FIG3 is a schematic structural diagram of the current collecting plate in FIG1 .

[0015] FIG4 is a schematic structural diagram of a cover assembly provided by some other possible implementations of the present application.

[0016] FIG5 is a schematic structural diagram of a cover assembly provided by some further possible implementations of the present application.

[0017] Description of reference numerals:

[0018] 100. Cover plate assembly; 101. Mounting piece; 102. Main body; 103. Blocking portion; 104. Mounting side; 105. Collecting plate; 106. First connecting portion; 107. First bending portion; 108. Second connecting portion; 109. Second bending portion; 110. Transition portion; 111. Mounting groove; 112. Mounting portion; 113. Opening portion; 114. Support platform; 115. Limiting portion; 116. Baffle strip; 117. First section; 118. Second section; 119. Third section; 120. Stopper; 121. First boss; 122. Second boss; 123. Fixing hole; 124. Through hole. Modes for Carrying Out the Invention

[0019] In the related art, the cover assembly of the battery mainly includes a lower plastic part, a pole, a top cover and a current collecting plate, among which the current collecting plate is mainly used to connect the pole and the winding core. The current collecting plate generally includes a pole connecting section, a bending section and a winding core connecting section. During the installation process, the pole connecting section is first welded to the pole, and the current collecting plate is bent for the first time so that the bending section and the winding core connecting section are located below the pole connecting section, and then bent for the second time so that the winding core connecting section is located below the bending section, which facilitates the connection between the winding core connecting section and the winding core; during the first bending process, the welding point between the pole connecting section and the pole will be pulled. When the pulling force is too large, the current collecting plate will be deformed and broken, and even the welding point between the pole connecting section and the pole will be torn, resulting in the desoldering of the pole connecting section and the pole.

[0020] In view of this, the present application proposes a cover plate assembly 100. Figures 1 to 5 are structural schematic diagrams of an embodiment of the cover plate assembly 100 provided by the present application. The cover plate assembly 100 provided by the present application has a simple structure and can prevent the collecting plate from deforming and breaking. The cover plate assembly 100 will be described in detail below in conjunction with the main drawings.

[0021] Please refer to Figures 1, 2 and 3. The collecting plate 105 in Figure 1 is in the unfolded state. The cover assembly 100 includes a mounting member 101 and a collecting plate 105; the mounting member 101 includes a main body 102 and a blocking portion 103, the main body 102 is formed with a mounting side 104, and the blocking portion 103 is connected to the mounting side 104; the collecting plate 105 includes a first connecting portion 106, a first bending portion 107 and a second connecting portion 108 connected in sequence, the first connecting portion 106 is installed on the mounting side 104, and the blocking portion 103 abuts against the side of the first bending portion 107 away from the main body 102, so that the first bending portion 107 is located between the main body 102 and the blocking portion 103.

[0022] In the technical solution of the present application, the first connecting portion 106 is configured to be connected to the pole of the battery, and the second connecting portion 108 is configured to be connected to the winding core of the battery. After the first connecting portion 106 is fixed to the main body 102, the collecting plate 105 needs to be bent. By providing a blocking portion 103 on the mounting member 101 to cooperate with the main body 102, due to the provision of the blocking portion 103, the collecting plate 105 can only be bent at the first bending portion 107, which can avoid pulling the first connecting portion 106 or the second connecting portion 108 during the bending process. This causes the first connection part 106 or the second connection part 108 to be deformed and damaged, and cannot be welded normally; since the first connection part 106 is connected to the main body 102, a pulling force will be generated on the first connection part 106 during the bending process, and the blocking part 103 can resist the pulling force generated during the bending process to prevent the first connection part 106 from separating from the main body 102; similarly, the second connection part 108 is connected to the winding core, and the winding core will generate a pulling force on the second connection part 108. The blocking part 103 can resist part of the pulling force to prevent the collecting plate 105 from being pulled, deformed, or even broken.

[0023] It should be noted that, referring to Figure 3, the current collecting plate 105 also includes a second bending portion 109 and a transition portion 110, and the second bending portion 109 and the transition portion 110 are located between the first bending portion 107 and the second connecting portion 108. Specifically, the transition portion 110 is connected to the first bending portion 107, the transition portion 110 is connected to the second bending portion 109, and the second bending portion 109 is connected to the second connecting portion 108. In the actual installation process, taking the extension direction of the battery as an example, the first connecting portion 106 is welded to the battery pole. After welding is completed, the current collecting plate 105 is bent at the first bending portion so that the transition portion 110, the second bending portion 109 and the second connecting portion 108 are located below the first connecting portion 106. Then the current collecting plate 105 is bent again at the second bending portion 109 so that the second connecting portion 108 is located below the transition portion 110. The second connecting portion 108 is then welded to the winding core of the battery. This arrangement makes rational use of space and improves the compactness of the structure.

[0024] It should be noted that, in this embodiment, the specific type of the mounting member 101 is not limited. The mounting member 101 can be an upper plastic member or a lower plastic member, and the selection can be made according to actual conditions.

[0025] Specifically, in some embodiments, in order to improve space utilization and reduce the weight of the cover assembly 100, a mounting groove 111 is formed on the mounting side 104 of the main body 102; the first connecting portion 106 is arranged in the mounting groove 111, more specifically, the mounting member 101 also includes a mounting portion 112, and the mounting portion 112 is formed in the mounting groove 111; it should be noted that the mounting portion 112 includes two circular bosses, and the two circular bosses are arranged opposite to each other along the groove width direction of the mounting groove 111, and the first connecting portion 106 is connected to the two circular bosses. It should be noted that, in this embodiment, the two circular bosses are the poles of the battery.

[0026] In this embodiment, the blocking portion 103 is spaced apart from the bottom of the mounting groove 111, and the mounting member 101 further includes a limiting portion 115, which is disposed in the mounting groove 111 and is located on the side of the mounting portion 112 away from the blocking portion 103. Specifically, the limiting portion 115, the mounting portion 112, and the blocking portion 103 are arranged along the extension direction of the mounting groove 111, and there is no interference between the three. The height of the limiting portion 115 is higher than the height of the mounting portion 112, so as to avoid the first connecting portion 111 from interfering with each other. 06 exceeds the mounting portion 112; during the installation of the collecting plate 105, the first mounting portion 112 is first passed through the blocking portion 103 until the first connecting portion 106 abuts against the limiting portion 115. At this time, the first connecting portion 106 is just clamped on the mounting portion 112, and the first bending portion 107 is located between the blocking portion 103 and the bottom of the mounting groove 111, thereby completing the pre-fixation of the collecting plate 105. When the pre-fixation of the collecting plate 105 is completed, the first connecting portion 106 is welded to the mounting portion 112.

[0027] In some embodiments, please refer to Figure 3, an opening portion 113 is formed at one end of the mounting groove 111 to pass through the main body 102; when the collecting plate 105 is in the expanded state, the collecting plate 105 enters the mounting groove 111 through the opening portion 113, so that the first connecting portion 106 is connected to the mounting portion 112; it should be noted that the mounting member 101 also includes a support platform 114, which is arranged in the mounting groove 111, and the support platform 114 is located between the mounting portion 112 and the opening portion 113; specifically, the height of the support platform 114 is the same as the height of the mounting portion 112, and the support platform 114 corresponds to the blocking portion 103, and more specifically, the first connecting portion 106 passes through the opening portion 113, so that the first bending portion 107 is located between the support platform 114 and the blocking portion 103. The support platform 114 is used to support the first bending portion 107 so that the first bending portion 107 and the first connecting portion 106 are at the same height, thereby preventing the first bending portion 107 from bending and deforming due to its own weight, thereby preventing it from breaking during the bending process.

[0028] The specific structure of the blocking portion 103 is not limited, as long as it can achieve a blocking effect and prevent the first connecting portion 106 and the mounting portion 112 from being desoldered. Specifically:

[0029] In some embodiments, the blocking portion 103 is a blocking strip, and both ends of the blocking strip are respectively connected to the inner wall of the mounting groove 111. Specifically, please refer to Figure 1. The baffle strip 116 includes a first section 117, a second section 118 and a third section 119 connected in sequence. The first section 117 and the third section 119 are respectively connected to the inner wall of the mounting groove 111. The second section 118 is located between the first section 117 and the third section 119. The second section 118 abuts the first bending portion, and the thickness of the second section 118 is less than the thickness of the first section 117 or the third section 119. It should be noted that after the first bending portion 107 is bent, the second connecting portion 108 will be located below the first connecting portion 106. Therefore, in order to avoid interference of the blocking portion 103 with the second connecting portion 108, the second section 118 is thinned so that the thickness of the second section 118 is smaller than the thickness of the first section 117 or the thickness of the third section 119. In this way, the blocking portion 103 can not only realize the blocking function, resist the pulling force generated during the bending process of the first bending portion 107, avoid the first connecting portion 106 and the mounting portion 112 from detaching, but also avoid affecting the space of the second connecting portion 108.

[0030] More specifically, the thickness of the first section 117 and the thickness of the third section 119 can be set to be the same, or the first section 117 or the third section 119 can be thinned according to actual conditions; in some embodiments, the blocking bar can be set to a cylindrical shape to avoid sharp edges and corners that may cause scratches on the second connecting portion 108 during the bending process.

[0031] In some embodiments, the width of the second section 118 is A1, 1mm≤A1≤5mm, specifically, A1 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm, and it can be selected according to actual conditions; the thickness of the second section 118 is A2, 0.5mm≤A2≤1.5mm, specifically, A2 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm, and it can be selected according to actual conditions.

[0032] In other embodiments, the blocking portion 103 is comprised of two blocks 120, as shown in FIG4 . To prevent the blocking portion 103 from interfering with the second connecting portion 108, the two blocks 120 are respectively connected to the inner sidewalls of the mounting groove 111 and are disposed opposite each other. The two blocks 120 abut the first bend. Specifically, the two blocks 120 are engaged with the edge of the first bend 107, leaving a blank area between the two blocks 120. During the bending process, the second connecting portion 108 can be positioned between the two blocks 120, thereby preventing the blocking portion 103 from interfering with the second connecting portion 108.

[0033] More specifically, each stopper 120 includes a first boss 121 and a second boss 122 connected in sequence. The first boss 121 is connected to the wall of the mounting groove 111, and the second boss 122 corresponds to the first bent portion 107. The thickness of the second boss 122 is less than that of the first boss 121. Specifically, the second boss 122 is thinned so that its thickness is less than that of the first boss 121. In this way, the blocking portion 103 can both perform a blocking function, resisting the pulling force generated during the bending of the first bent portion 107 to prevent the first connecting portion 106 from separating from the mounting portion 112, and avoid affecting the space of the second connecting portion 108.

[0034] In some embodiments, the length of the second boss 122 is L1, 1mm≤L1≤4mm, specifically, L1 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, or 4mm, and can be selected according to actual conditions; the width of the second boss 122 is L2, 1mm≤L2≤5mm, specifically, L2 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm, and can be selected according to actual conditions; the thickness of the second boss 122 is L3, 0.5mm≤L3≤1.5mm. Specifically, L3 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm, and you can choose according to the actual situation.

[0035] In some other embodiments, referring to FIG5 , the mounting member 101 further includes a support platform 114 disposed within the mounting groove 111, with a plurality of fixing holes 123 formed on the support platform 114, and a plurality of through holes 124 formed on the first bent portion 107; the blocking portion 103 is a plurality of screws, each screw passing through a corresponding through hole 124 and being fixed within a corresponding fixing hole 123, thereby fixing the first bent portion 107 to the support platform 114. It should be noted that configuring the blocking portion 103 as a screw allows the first bent portion 107 to be fixed without taking up additional space, thereby achieving a blocking function and resisting the pulling force generated during the bending process of the first bent portion 107, thereby preventing the first connecting portion 106 from separating from the mounting portion 112.

[0036] This application also provides a battery, which includes a cover assembly 100. Since this battery adopts all technical solutions of all embodiments of the cover assembly 100, it has at least all the beneficial effects brought by the technical solutions of the embodiments of the cover assembly 100, which will not be described in detail here.

Claims

1. A cover plate assembly, comprising: The mounting member (101) comprises a main body (102) and a blocking portion (103), wherein the main body (102) is formed with a mounting side (104), and the blocking portion (103) is connected to the mounting side (104); and The collecting plate (105) comprises a first connecting portion (106), a first bending portion (107) and a second connecting portion (108) which are connected in sequence, wherein the first connecting portion (106) is mounted on the mounting side (104), and the blocking portion (103) abuts against a side of the first bending portion (107) which is away from the main body (102), so that the first bending portion (107) is located between the main body (102) and the blocking portion (103).

2. The cover plate assembly according to claim 1, wherein, The collecting plate (105) further comprises a second bending portion (109) and a transition portion (110) which are connected in sequence, wherein the second bending portion (109) and the transition portion (110) are connected between the first bending portion (107) and the second connecting portion (108), and the second bending portion (109) is connected to the second connecting portion (108), and the transition portion (110) is connected to the first bending plate (107).

3. The cover plate assembly according to claim 1 or 2, wherein The mounting side (104) of the main body (102) is formed with a mounting groove (111); The mounting member (101) further comprises a mounting portion (112) arranged in the mounting groove (111), the first connecting portion (106) is connected to the mounting portion (112), and the first bending portion (107) is located between the blocking portion (103) and the bottom of the mounting groove (111).

4. The cover plate assembly according to claim 3, wherein, The mounting member further comprises a limiting portion (115) disposed in the mounting groove (111), the limiting portion (115) being located on a side of the mounting portion (112) away from the blocking portion (103), and the limiting portion (115) being configured to abut against the first connecting portion (106).

5. The cover plate assembly according to claim 3, wherein, An opening portion (113) is formed at one end of the installation groove (111) to penetrate the main body (102); The mounting member (101) further comprises a support platform (114) disposed in the mounting groove (111), wherein the support platform (114) is located between the mounting portion (112) and the opening portion (113); The first connecting portion (106) passes through the opening portion (113), so that the first bending portion (107) is located between the supporting platform (114) and the blocking portion (103).

6. The cover plate assembly according to claim 5, wherein, The height of the support platform (114) is the same as the height of the mounting portion (112).

7. The cover plate assembly according to claim 3, wherein, The blocking portion (103) includes a baffle strip (116), the baffle strip (116) includes a first section (117), a second section (118) and a third section (119) connected in sequence, the first section (117) and the third section (119) are respectively connected to the inner side walls of the mounting groove (111), the second section (118) is located between the first section (117) and the third section (119), the second section (118) abuts against the first bent portion (107), and the thickness of the second section (118) is less than the thickness of the first section (117) or the third section (119).

8. The cover plate assembly according to claim 7, wherein, The baffle strip (116) is a cylindrical baffle strip.

9. The cover plate assembly according to claim 7, wherein, The width of the second section (118) is 1 - 5 mm, and the thickness of the second section (118) is 0.5 - 1.5 mm.

10. The cover plate assembly according to claim 3, wherein, The blocking portion (103) includes two stoppers (120), the two stoppers (120) are respectively connected to the inner side walls of the mounting groove (111) and are arranged oppositely, and the two stoppers (120) abut against the first bent portion (107).

11. The cover plate assembly according to claim 10, wherein, Each stopper (120) includes a first boss (121) and a second boss (122) connected in sequence, the first boss (121) is connected to the groove wall of the mounting groove (111), the second boss (122) corresponds to the first bent portion (107), and the thickness of the second boss (122) is less than the thickness of the first boss (121).

12. The cover plate assembly according to claim 11, wherein, The length of the second boss (122) is L1, 1 mm ≤ L1 ≤ 4 mm, the width of the second boss (122) is L2, 1 mm ≤ L2 ≤ 5 mm, and the thickness of the second boss (122) is L3, 0.5 mm ≤ L3 ≤ 1.5 mm.

13. The cover plate assembly according to claim 3, wherein, The mounting member (101) further includes a support platform (114) provided in the mounting groove (111), a plurality of fixing holes (123) are formed on the support platform (114), and a plurality of through holes (124) are formed on the first bent portion (107); The blocking portion (103) passes through the corresponding through hole (124) and is fixed in the corresponding fixing hole (123) to fix the first bent portion (107) on the support platform (114).

14. A battery, comprising a cover plate assembly (100) according to any one of claims 1 - 13.

15. The battery according to claim 14, further comprising a pole column and a wound core, the pole column is connected to the first connecting portion (106), and the wound core is connected to the second connecting portion (108).

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