Insulation structure and battery

Abstract

An insulation structure (100) and a battery (10). The insulation structure (100) comprises an insulation body (110) and a block plate (120); the block plate (120) is provided on at least one side of the insulation body (110) in the width direction; the block plate (120) is rotatably connected to the insulation body (110); the rotation axis of the block plate (120) extends in the length direction of the insulation body (110); the block plate (120) comprises connecting portions (121) and a block plate body (122) which are connected to each other; the block plate body (122) extends in the length direction of the insulation body (110); the connecting portions (121) are rotatably connected to the insulation body (110); and the block plate body (122) is separated from the insulation body (110).

Description

Insulation structure and battery

[0001] This application claims priority to Chinese Patent Application No. 202421388446.1, filed with the Chinese Patent Office on June 17, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to an insulation structure and a battery. Background Technology

[0003] A battery generally consists of a cell, a casing, a cover, an insulating structure, and terminals. The cover seals the casing, forming a protective shell. The cell is housed within this protective shell. The insulating structure isolates the cover from the cell. Terminals typically pass through the cover and the insulating structure to lead the positive and negative terminals of the cell to the outside of the protective shell. In related technologies, to prevent short circuits caused by the cell terminals contacting the inner wall of the casing when bent, a bendable baffle is incorporated into the insulating structure to isolate the cell terminals from the casing. However, this baffle generates significant stress concentration during bending, affecting the stability of the insulating structure and consequently impacting the overall performance of the battery. Invention Overview

[0004] The embodiments of this application provide an insulating structure and a battery that can improve the technical problem of stress concentration caused by the baffle during the process of isolating the cell tabs from the battery casing.

[0005] In a first aspect, embodiments of this application provide an insulating structure, comprising:

[0006] An insulating body is used to isolate the cover plate and the battery cell in a battery; the insulating body includes a first side and a second side facing each other, the first side being for connection with the cover plate and the second side being for facing the battery cell.

[0007] A baffle is disposed on at least one side of the insulating body along the width direction, the baffle is rotatably connected to the insulating body, and the axis of rotation of the baffle extends along the length direction of the insulating body;

[0008] The baffle includes a baffle body and a connecting part that are connected to each other. The baffle body extends along the length of the insulating body to isolate the electrode tab of the cell from the battery casing. The connecting part is rotatably connected to the insulating body. The baffle body and the insulating body are separately set.

[0009] Secondly, embodiments of this application provide a battery, the battery comprising:

[0010] The outer shell forms a receiving cavity;

[0011] A cover plate, connected to the outer shell, has a through hole communicating with the receiving cavity;

[0012] The insulating structure of any of the above-mentioned items is located on the side of the cover plate facing the receiving cavity, and the insulating structure is connected to the cover plate; the baffle in the insulating structure is bent toward the receiving cavity relative to the insulating body;

[0013] The pole is connected to the cover plate, and the pole passes through the through hole and the mounting hole on the insulating body in sequence.

[0014] The battery cell is located inside the housing cavity. The tabs of the battery cell are electrically connected to the terminals. The tabs of the battery cell are located on the side of the baffle away from the outer casing. Beneficial effects

[0015] In embodiments of this application, the insulating structure includes an insulating body and a baffle. The insulating body is used to isolate the cover plate and the battery cell in the battery. The insulating body includes a first side and a second side facing each other. The first side is used to connect with the cover plate, and the second side is used to face the battery cell. The baffle is disposed on at least one side of the insulating body along the width direction. The baffle is rotatably connected to the insulating body, and the rotation axis of the baffle extends along the length direction of the insulating body. The baffle includes a baffle body and a connecting part that are connected to each other. The baffle body extends along the length direction of the insulating body to isolate the electrode tab of the battery cell from the battery casing. The connecting part is rotatably connected to the insulating body, and the baffle body is separately disposed from the insulating body. This application provides a baffle on at least one side of the insulating body along its width direction, and uses the rotatable connection between the baffle and the insulating body to isolate the cell tab from the battery casing, thereby reducing the risk of short circuit due to contact between the cell tab and the battery casing when the cell tab is bent. At the same time, by separating the baffle body from the insulating body and connecting it to the insulating body only through the connecting part, this application can reduce the stress generated when the baffle is bent relative to the insulating body, as well as the stress generated when the cell tab squeezes the baffle when bent, thereby helping to ensure the structural stability of the insulation structure during use. Attached Figure Description

[0016] Figure 1 is a three-dimensional structural schematic diagram of an insulation structure provided in an embodiment of this application;

[0017] Figure 2 is an enlarged structural schematic diagram of region A in Figure 1 provided by an embodiment of this application;

[0018] Figure 3 is a top view of an insulation structure provided in an embodiment of this application;

[0019] Figure 4 is a front view schematic diagram of an insulation structure provided in an embodiment of this application;

[0020] Figure 5 is an enlarged structural schematic diagram of region B in Figure 4 provided by an embodiment of this application;

[0021] Figure 6 is a three-dimensional structural diagram of the insulation structure from another perspective provided by an embodiment of this application;

[0022] Figure 7 is a partial structural schematic diagram of a battery provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. Battery;

[0025] 100. Insulation structure; 110. Insulation body; 111. First surface; 112. Second surface; 113. Snap-fit ​​groove; 114. Mounting hole; 115. Groove; 120. Baffle; 121. Connecting part; 122. Baffle body; 123. Snap-fit ​​part; 1231. Connecting sub-part; 1232. Snap-fit ​​sub-part; 130. Bending area; 140. Reinforcing rib; a. Rotation axis; X. Length direction; Y. Width direction; Z. Thickness direction;

[0026] 200. Outer shell; 210. Receiving cavity;

[0027] 300, cover plate; 310, through hole;

[0028] 400, pole;

[0029] 500, battery cell; 510, electrode tab; 511, protrusion. Embodiments of the present invention

[0030] This application provides an insulating structure, as shown in Figures 1 and 2. The insulating structure 100 includes an insulating body 110, which isolates the cover plate 300 and the battery cell 500 in the battery 10. The insulating body 110 includes a first surface 111 and a second surface 112 facing each other. The first surface 111 is used to connect with the cover plate 300, and the second surface 112 faces the battery cell 500. That is, when assembling the battery 10, the insulating body 110 is located between the cover plate 300 and the battery cell 500 to avoid direct contact between the battery cell 500 and the cover plate 300, thereby facilitating the electrical connection or insulation design between the battery cell 500 and the cover plate 300.

[0031] The insulation structure 100 also includes a baffle 120, which is disposed on at least one side of the insulation body 110 along the width direction Y. The baffle 120 is rotatably connected to the insulation body 110, and the rotation axis a of the baffle 120 extends along the length direction X of the insulation body 110. That is, the baffle 120 can rotate relative to the insulating body 110 in the direction of the first surface 111 or the second surface 112, that is, the baffle 120 can rotate relative to the insulating body 110 in the direction of approaching or moving away from the cell 500; when assembling the battery 10, the cover plate 300 and the insulating body 110 are provided with the terminal post 400. After the welding of the cell 500's tab 510 and the terminal post 400 is completed, the cell 500's tab 510 will be bent. At this time, the baffle 120 is bent relative to the insulating body 110 in the direction of approaching the cell 500, so that the baffle 120 is isolated between the cell 500's tab 510 and the battery 10's casing 200. This can effectively prevent the tab 510 from short-circuiting due to direct contact with the battery 10's casing 200 in the bent state, thereby ensuring the normal use of the battery 10.

[0032] As shown in Figure 3, the baffle 120 includes a baffle body 122 and a connecting part 121 connected to each other. The baffle body 122 extends along the length direction X of the insulating body 110 to isolate the tab 510 of the cell 500 from the outer casing 200 of the battery 10. The connecting part 121 is rotatably connected to the insulating body 110, and the baffle body 122 is separated from the insulating body 110. The baffle 120 is rotatably connected to the insulating body 110 via the connecting part 121. The baffle body 122, which is used to isolate the tab 510 of the cell 500 from the outer casing 200 of the battery 10, is completely separated from the insulating body 110. This structural design means that when the insulating structure 100 is applied to the battery 10, no stress is generated between the insulating body 110 and the baffle body 122 after the baffle 120 is rotated and bent relative to the insulating body 110 towards the cell 500. Moreover, the baffle body 122 has a larger area than the connecting part 121, which helps to reduce the stress between the insulating body 110 and the baffle 120 as a whole. It also helps to reduce the stress generated when the tab 510 of the cell 500 is squeezed by the baffle 120 in a bent state, thereby ensuring the structural stability of the insulating structure 100 during use.

[0033] It should be noted that, since the tab 510 of the cell 500 is bent in one direction after being welded to the terminal post 400, a baffle 120 can be provided only on one side of the insulation body 110 in the width direction Y corresponding to the bending direction of the tab 510, so as to isolate the tab 510 of the cell 500 from the casing 200 of the battery 10. Of course, depending on the structure of the battery 10, baffles 120 can also be provided on both opposite sides of the insulation body 110 in the width direction Y, so as to further reduce the risk of short circuit when the tab 510 of the cell 500 comes into contact with the casing 200 of the battery 10. The specific setting of the baffle 120 can be selected and adjusted according to the actual design requirements, and no special restrictions are imposed here.

[0034] The insulating structure 100 in this embodiment includes an insulating body 110 and a baffle 120. The insulating body 110 is used to isolate the cover plate 300 and the cell 500 in the battery 10. The insulating body 110 includes a first surface 111 and a second surface 112 facing each other. The first surface 111 is used to connect with the cover plate 300, and the second surface 112 is used to face the cell 500. The baffle 120 is disposed on at least one side of the insulating body 110 along the width direction Y. The baffle 120 is rotatably connected to the insulating body 110, and the rotation axis a of the baffle 120 extends along the length direction X of the insulating body 110. The baffle 120 includes a baffle body 122 and a connecting part 121 connected to each other. The baffle body 122 extends along the length direction X of the insulating body 110 to isolate the tab 510 of the cell 500 from the outer casing 200 of the battery 10. The connecting part 121 is rotatably connected to the insulating body 110, and the baffle body 122 is separately disposed from the insulating body 110. This application provides a baffle 120 on at least one side of the insulating body 110 along the width direction Y. The rotatable connection between the baffle 120 and the insulating body 110 isolates the tab 510 of the cell 500 from the casing 200 of the battery 10, thereby reducing the risk of short circuit when the tab 510 of the cell 500 comes into contact with the casing 200 of the battery 10 in a bent state. At the same time, by separating the baffle body 122 of the baffle 120 from the insulating body 110 and connecting it to the insulating body 110 only through the connecting part 121, this application can reduce the stress generated when the baffle 120 is bent relative to the insulating body 110, as well as the stress generated when the tab 510 of the cell 500 is squeezed against the baffle 120 in a bent state, thereby helping to ensure the structural stability of the insulating structure 100 during use.

[0035] In some embodiments, the baffle 120 includes two connecting portions 121 disposed opposite to each other along the length X of the insulating body 110, and the baffle body 122 is connected between the two connecting portions 121. That is, the baffle body 122 is connected to the insulating body 110 through the connecting portions 121 located at its two ends. This reduces the stress generated when the baffle 120 is bent relative to the insulating body 110, as well as the stress generated when the electrode tab 510 of the battery cell 500 is squeezed against the baffle 120 in a bent state. It also helps to improve the connection stability between the baffle 120 and the insulating body 110, thereby further improving the overall structural stability of the insulating structure 100 during use.

[0036] Optionally, the baffle 120 has an unfolded position and a snap-fit ​​position. When the baffle 120 is in the unfolded position, the baffle 120 and the insulating body 110 can be located on the same plane, so that the insulating structure 100 can be laid flat on the cover plate 300 before welding the tab 510 of the cell 500 to the terminal 400, thereby facilitating the welding of the tab 510 of the cell 500 to the terminal 400. After the welding of the tab 510 of the cell 500 to the terminal 400 is completed, the baffle 120 needs to be bent relative to the insulating body 110 so that the baffle 120 is in the snap-fit ​​position. At this time, the baffle 120 and the insulating body 110 form an angle (such as perpendicular), and the baffle 120 and the insulating body 110 snap together to facilitate the subsequent casing operation. At the same time, the bent baffle 120 can also isolate the tab 510 of the cell 500 from the outer casing 200 of the battery 10 to avoid short circuit.

[0037] Specifically, when the baffle 120 rotates from the unfolded position to the latched position, the baffle 120 rotates relative to the insulating body 110 toward the second surface 112, that is, the baffle 120 rotates relative to the insulating body 110 toward the direction closer to the battery cell 500; when the baffle 120 rotates from the latched position to the unfolded position, the baffle 120 rotates relative to the insulating body 110 toward the first surface 111, that is, the baffle 120 rotates relative to the insulating body 110 toward the direction away from the battery cell 500.

[0038] In some embodiments, when the baffle 120 is rotated to the snap-fit ​​position, the side of the baffle body 122 facing the cover plate 300 is used to abut against the cover plate 300. That is, when the insulating structure 100 is applied to the battery 10, the baffle 120 is in the snap-fit ​​position after bending. The side of the bent baffle body 122 facing the cover plate 300 directly abuts against the cover plate 300. The interaction force between the cover plate 300 and the baffle body 122 can reduce the risk of the baffle 120 deforming under the pressure of the cell 500 tab 510, thereby reducing the risk of short circuit caused by the cell 500 tab 510 contacting the battery 10 casing 200.

[0039] The height of the baffle 120 can be designed based on the height of the battery cell 500 tab 510 after bending. It is only necessary to ensure that the height of the baffle 120 is not less than the height of the battery cell 500 tab 510 after bending. No special restrictions are imposed here.

[0040] Optionally, as shown in Figures 4 and 5, the baffle 120 has a protruding snap-fit ​​portion 123 on its surface, and the insulating body 110 has a snap-fit ​​groove 113 on the side facing the baffle 120 corresponding to the snap-fit ​​portion 123. When the baffle 120 is rotated relative to the insulating body 110 toward the second surface 112 to the locking position, the snap-fit ​​portion 123 is used to snap into the snap-fit ​​groove 113. That is, when the insulating structure 100 is applied to the battery 10, the baffle 120 is rotated and bent relative to the insulating body 110 toward the second surface 112. After rotation, the snap-fit ​​portion 123 on the baffle 120 will snap into the snap-fit ​​groove 113 on the insulating body 110, ensuring the relative stability of the position of the baffle 120 after rotation and bending, and preventing the baffle 120 from rebounding under the stress between the connecting portion 121 and the insulating body 110, or under the squeezing action of the battery cell 500 tab 510, thereby ensuring the overall structural stability of the insulating structure 100 during use.

[0041] The snap-fit ​​part 123 can be disposed on the connecting part 121, or on the baffle body 122, or on both the connecting part 121 and the baffle body 122. Its specific placement position can be selected and adjusted according to actual design requirements. It is only necessary to ensure that when the baffle 120 is in the snap-fit ​​position, the snap-fit ​​part 123 can be stably snapped into the snap-fit ​​groove 113 to ensure the overall structural stability of the insulation structure 100. No special restrictions are imposed here.

[0042] It should be noted that the positions of the snap-fit ​​part 123 and the snap-fit ​​groove 113 can be interchanged. That is, the snap-fit ​​part 123 is located on the side of the insulating body 110 facing the connecting part 121, and the snap-fit ​​groove 113 is correspondingly located on the surface of the baffle 120. The specific arrangement can be selected and adjusted according to the actual design requirements, and no special restrictions are imposed here.

[0043] In some embodiments, the snap-fit ​​portion 123 includes a connecting sub-portion 1231 connected to the baffle 120, and two snap-fit ​​sub-portions 1232 connected to the connecting sub-portion 1231 on the side opposite to the baffle 120. The two snap-fit ​​sub-portions 1232 are spaced apart along the length X of the insulating body 110. When the baffle 120 rotates relative to the insulating body 110 toward the second surface 112 to the snap-fit ​​position, the snap-fit ​​sub-portions 1232 are used to snap into the snap-fit ​​groove 113. That is, when the baffle 120 rotates and bends relative to the insulating body 110 toward the second surface 112, the two snap-fit ​​sub-portions 1232 deform towards each other under the force of the side wall of the snap-fit ​​groove 113 when they come into contact with it. After the two snap-fit ​​sub-portions 1232 pass through the snap-fit ​​groove 113, they spring back in opposite directions under the action of the rebound force, thereby realizing the snap-fit ​​between the two snap-fit ​​sub-portions 1232 and the snap-fit ​​groove 113.

[0044] In some embodiments, as shown in FIG5, the connecting part 1231 has a first orthographic projection on the insulating body 110 in the width direction Y. The first orthographic projection is located in the snap-fit ​​groove 113 on opposite sides of the insulating body 110 in the length direction X. The distance D1 between the opposite sides of the first orthographic projection in the length direction X of the insulating body 110 and the sidewall of the corresponding snap-fit ​​groove 113 is less than or equal to 0.2mm. If the distance D1 is too large, it may cause poor snap-fit ​​effect between the snap-fit ​​part 1232 and the snap-fit ​​groove 113, making the snap-fit ​​part 1232 easy to detach from the snap-fit ​​groove 113 under the action of external force, thereby affecting the overall structural stability of the insulating structure 100.

[0045] Specifically, in the actual manufacturing process, the spacing D1 can be set to 0.05mm, 0.1mm, 0.15mm or 0.2mm, etc. The specific value can be selected and adjusted according to the actual design requirements. As long as the effective engagement between the snap-fit ​​part 1232 and the snap-fit ​​groove 113 is ensured, there are no special restrictions here.

[0046] In some embodiments, in the width direction Y of the insulating body 110, the opposite sides of the two snap-fit ​​portions 1232 have a second orthographic projection on the insulating body 110. The second orthographic projection portion is located outside the snap-fit ​​groove 113. The ratio of the maximum value D2 of the distance between the portion of the second orthographic projection outside the snap-fit ​​groove 113 and the corresponding sidewall of the snap-fit ​​groove 113 to the thickness T of the insulating body 110 is greater than or equal to 0.25 and less than or equal to 1. If this ratio is too large, it means that D2 is larger, that is, the more the snap-fit ​​portion 1232 protrudes, which may cause the snap-fit ​​portion 1232 to fail to snap into the snap-fit ​​groove 113; if this ratio is too small, it means that D2 is smaller, that is, the less the snap-fit ​​portion 1232 protrudes, which may cause the snap-fit ​​portion 1232 to detach from the snap-fit ​​groove 113 during use.

[0047] Specifically, in the actual manufacturing process, this ratio can be set to 0.25, 0.5, 0.75 or 1, etc. The specific value can be selected and adjusted according to the actual design requirements. It is only necessary to ensure the effective engagement between the snap-fit ​​part 1232 and the snap-fit ​​slot 113. No special restrictions are imposed here.

[0048] The outer surface of the snap-fit ​​part 1232 can be set as an arc surface, and the snap-fit ​​part 1232 is generally spherical, which helps the snap-fit ​​part 1232 to smoothly pass through the side wall of the snap-fit ​​groove 113 and snap into the snap-fit ​​groove 113; of course, the snap-fit ​​part 1232 can also be set as other shapes, as long as it can be smoothly snapped into the snap-fit ​​groove 113, and there are no special restrictions here.

[0049] Optionally, the baffle 120 and the insulating body 110 are integrally formed, and a bending region 130 is formed at the connection between the connecting part 121 and the insulating body 110. The maximum thickness of the bending region 130 is less than the thickness of the connecting part 121, so that the connecting part 121 and the insulating body 110 are rotatably connected. That is, the baffle 120 and the insulating body 110 are an integral structure, and the bending region 130 is the thinning region between the baffle 120 and the insulating body 110. By setting the maximum thickness of the bending region 130 to be less than the thickness of the connecting part 121, the baffle 120 can be rotated and bent relative to the insulating body 110 through the bending region 130, thereby achieving the isolation of the cell 500 tab 510 and the battery 10 casing 200 by the baffle 120.

[0050] In addition to thinning, the bending area 130 can also have multiple through holes spaced apart to improve its bendability. The specific arrangement can be selected and adjusted according to the actual design requirements. It is only necessary to ensure that the baffle 120 can be bent relative to the insulating body 110 through the bending area 130. No special restrictions are imposed here.

[0051] In some embodiments, as shown in FIG3, a reinforcing rib 140 is provided on the baffle body 122. The reinforcing rib 140 extends along the length direction X of the insulating body 110, that is, the baffle body 122 is provided with a strip-shaped reinforcing rib 140. Since the baffle 120 itself is made of relatively soft material, it is easy to deform during use. By providing a reinforcing rib 140 on the baffle 120, it is possible to effectively prevent the baffle 120 from bending during use and affecting the insertion of the insulating structure 100 into the shell.

[0052] In other embodiments, as shown in FIG6, an mounting hole 114 is provided on the insulating body 110, the mounting hole 114 extending through the insulating body 110 along the thickness direction Z, and the mounting hole 114 is used to mount the terminal post 400 of the battery 10; at least two grooves 115 are provided on one side of the insulating body 110 along the width direction Y, the grooves 115 extending along the width direction Y of the insulating body 110, and the grooves 115 are distributed on opposite sides of the mounting hole 114 along the length direction X of the insulating body 110. That is, the grooves 115 distributed on opposite sides of the mounting hole 114 constitute a shock-absorbing structure. During the use of the battery 10, when the terminal post 400 is subjected to pressure, this shock-absorbing structure can play a buffering role, thereby protecting the battery cell 500 tab 510 from damage, and thus ensuring the performance of the battery 10.

[0053] Secondly, this application provides a battery that includes an insulating structure. The specific structure of the insulating structure is as described in the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0054] As shown in Figure 7, the battery 10 includes a casing 200, a cover plate 300, an insulating structure 100, a terminal post 400, and a battery cell 500. The casing 200 forms a receiving cavity 210. The cover plate 300 is connected to the casing 200, and a through hole 310 communicating with the receiving cavity 210 is provided on the cover plate 300. The insulating structure 100 is located on the side of the cover plate 300 facing the receiving cavity 210 and is connected to the cover plate 300. The baffle 120 in the insulating structure 100 is bent towards the receiving cavity 210 relative to the insulating body 110. The terminal post 400 is connected to the cover plate 300 and passes through the through hole 310 and the mounting hole 114 on the insulating body 110 in sequence. The battery cell 500 is located inside the receiving cavity 210, and the tab 510 of the battery cell 500 is electrically connected to the terminal post 400. The tab 510 of the battery cell 500 is located on the side of the baffle 120 away from the casing 200.

[0055] When assembling the battery 10, the terminal 400 passes through the cover plate 300 and the insulating body 110. After the electrode tab 510 of the cell 500 is welded to the terminal 400, the electrode tab 510 of the cell 500 is bent. At this time, the baffle 120 is bent relative to the insulating body 110 towards the cell 500, so that the baffle 120 is in the snap-fit ​​position. The baffle 120 is isolated between the electrode tab 510 of the cell 500 and the outer casing 200 of the battery 10, which can effectively prevent the electrode tab 510 from short-circuiting due to direct contact with the outer casing 200 of the battery 10 in the bent state, thereby ensuring the normal use of the battery 10.

[0056] When the baffle 120 is bent relative to the insulating body 110 toward the direction of the cell 500, the baffle 120 will squeeze the tab 510, so that the tab 510 is dispersed under the squeezing action of the baffle 120, that is, the two adjacent tabs 510 are not in a tightly attached state, so as to avoid the tab 510 from overheating due to overcurrent. At the same time, the tab 510 will bulge toward the baffle 120 under the squeezing action of the baffle 120 and form a protrusion 511. Since the tab 510 is in a dispersed state, the formation of the protrusion 511 helps to increase the heat dissipation area of ​​the tab 510, thereby helping to improve the overall heat dissipation effect of the tab 510, further avoiding the overheating caused by overcurrent, and thus improving the performance of the battery 10.

[0057] Specifically, as shown in Figures 1 to 3, the insulating structure 100 includes an insulating body 110 and a baffle 120. The insulating body 110 is used to isolate the cover plate 300 and the cell 500 in the battery 10. The insulating body 110 includes a first surface 111 and a second surface 112 facing each other. The first surface 111 is used to connect with the cover plate 300, and the second surface 112 is used to face the cell 500. The baffle 120 is disposed on at least one side of the insulating body 110 along the width direction Y. The baffle 120 is rotatably connected to the insulating body 110, and the rotation axis a of the baffle 120 extends along the length direction X of the insulating body 110. The baffle 120 includes a baffle body 122 and a connecting part 121 connected to each other. The baffle body 122 extends along the length direction X of the insulating body 110 to isolate the tab 510 of the cell 500 from the outer casing 200 of the battery 10. The connecting part 121 is rotatably connected to the insulating body 110, and the baffle body 122 is separately disposed from the insulating body 110.

[0058] This application provides a baffle 120 on at least one side of the insulating body 110 along the width direction Y. The rotatable connection between the baffle 120 and the insulating body 110 isolates the tab 510 of the cell 500 from the casing 200 of the battery 10, thereby reducing the risk of short circuit when the tab 510 of the cell 500 comes into contact with the casing 200 of the battery 10 in a bent state. At the same time, by separating the baffle body 122 of the baffle 120 from the insulating body 110 and connecting it to the insulating body 110 only through the connecting part 121, this application can reduce the stress generated when the baffle 120 is bent relative to the insulating body 110, as well as the stress generated when the tab 510 of the cell 500 is squeezed against the baffle 120 in a bent state. This helps to ensure the structural stability of the insulating structure 100 during use, thereby ensuring the performance of the battery 10.

Claims

1. An insulating structure (100), comprising: An insulating body (110) is used to isolate the cover plate (300) and the cell (500) in the battery (10); the insulating body (110) includes a first surface (111) and a second surface (112) facing each other, the first surface (111) being connected to the cover plate (300) and the second surface (112) being facing the cell (500). A baffle (120) is disposed on at least one side of the insulating body (110) along the width direction. The baffle (120) is rotatably connected to the insulating body (110), and the axis of rotation of the baffle (120) extends along the length direction of the insulating body (110). The baffle (120) includes a baffle body (122) and a connecting part (121) connected to each other. The baffle body (122) extends along the length direction of the insulating body (110) to isolate the tab (510) of the cell (500) from the outer shell (200) of the battery (10). The connecting part (121) is rotatably connected to the insulating body (110). The baffle body (122) is separated from the insulating body (110).

2. The insulation structure (100) according to claim 1, wherein, The baffle (120) includes two connecting portions (121) arranged opposite each other along the length of the insulating body (110), and the baffle body (122) is connected between the two connecting portions (121).

3. The insulation structure (100) according to claim 1, wherein, The baffle (120) has an unfolded position and a snap-fit ​​position. When the baffle (120) rotates from the unfolded position to the snap-fit ​​position, the baffle (120) rotates relative to the insulating body (110) toward the second surface (112). When the baffle (120) rotates from the snap-fit ​​position to the unfolded position, the baffle (120) rotates relative to the insulating body (110) toward the first surface (111).

4. The insulation structure (100) according to claim 3, wherein, When the baffle (120) is rotated to the engaging position, the side of the baffle body (122) facing the cover plate (300) is used to abut against the cover plate (300).

5. The insulation structure (100) according to claim 3, wherein, The baffle (120) has a protruding snap-fit ​​part (123) on its surface. The insulating body (110) has a snap-fit ​​groove (113) on the side facing the baffle (120) corresponding to the snap-fit ​​part (123). When the baffle (120) rotates relative to the insulating body (110) toward the second surface (112) to the snap-fit ​​position, the snap-fit ​​part (123) is used to snap into the snap-fit ​​groove (113).

6. The insulation structure (100) according to claim 5, wherein, The outer surface of the snap-fit ​​part (1232) is set as an arc surface.

7. The insulation structure (100) according to claim 5, wherein, The snap-fit ​​portion (123) includes a connecting sub-portion (1231) connected to the baffle (120), and two snap-fit ​​sub-portions (1232) connected to the connecting sub-portion (1231) on the side away from the baffle (120). The two snap-fit ​​sub-portions (1232) are spaced apart along the length direction of the insulating body (110). When the baffle (120) rotates relative to the insulating body (110) toward the second surface (112) to the snap-fit ​​position, the snap-fit ​​sub-portion (1232) is used to snap into the snap-fit ​​groove (113).

8. The insulation structure (100) according to claim 7, wherein, In the width direction of the insulating body (110), the connecting sub-part (1231) has a first orthographic projection on the insulating body (110). The first orthographic projection is located in the snap-fit ​​groove (113) on opposite sides of the length direction of the insulating body (110). The distance between the first orthographic projection on opposite sides of the length direction of the insulating body (110) and the sidewall of the corresponding snap-fit ​​groove (113) is less than or equal to 0.2 mm.

9. The insulation structure (100) according to claim 7, wherein, In the width direction of the insulating body (110), the two opposite sides of the snap-fit ​​parts (1232) have a second orthographic projection on the insulating body (110). The second orthographic projection portion is located outside the snap-fit ​​groove (113). The ratio of the maximum value of the distance between the portion of the second orthographic projection outside the snap-fit ​​groove (113) and the sidewall corresponding to the snap-fit ​​groove (113) to the thickness of the insulating body (110) is greater than or equal to 0.25 and less than or equal to 1.

10. The insulating structure (100) according to any one of claims 1 to 9, wherein, The baffle (120) is integrally formed with the insulating body (110).

11. The insulation structure (100) according to claim 10, wherein, A bending area (130) is formed at the connection between the connecting part (121) and the insulating body (110). The maximum thickness of the bending area (130) is less than the thickness of the connecting part (121) so that the connecting part (121) and the insulating body (110) are rotatably connected.

12. The insulating structure (100) according to any one of claims 1 to 9, wherein, The baffle body (122) is provided with reinforcing ribs (140), which extend along the length direction of the insulating body (110).

13. The insulating structure (100) according to any one of claims 1 to 9, wherein, The insulating body (110) has a mounting hole (114) that penetrates the insulating body (110) along its thickness direction and is used to mount the terminal post (400) of the battery (10). The insulating body (110) has at least two grooves (115) on one side along its width direction. The grooves (115) extend along the width direction of the insulating body (110). Along the length direction of the insulating body (110), the grooves (115) are distributed on opposite sides of the mounting hole (114).

14. A battery (10), the battery (10) comprising: The outer shell (200) has a receiving cavity (210); A cover plate (300) is connected to the outer shell (200), and the cover plate (300) has a through hole (310) communicating with the receiving cavity (210). The insulating structure (100) according to any one of claims 1 to 13, wherein the insulating structure (100) is located on the side of the cover plate (300) facing the receiving cavity (210), and the insulating structure (100) is connected to the cover plate (300); the baffle (120) in the insulating structure (100) is bent toward the receiving cavity (210) relative to the insulating body (110); The pole (400) is connected to the cover plate (300), and the pole (400) passes through the through hole (310) and the mounting hole (114) on the insulating body (110) in sequence. The battery cell (500) is located inside the receiving cavity (210). The tab (510) of the battery cell (500) is electrically connected to the terminal post (400). The tab (510) of the battery cell (500) is located on the side of the baffle (120) away from the outer shell (200).

15. The battery (10) according to claim 14, wherein, The tabs (510) are dispersed, and the tabs (510) protrude toward the baffle (120) to form protrusions (511).

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