Battery support structure and power battery

Abstract

The utility model relates to the technical field of power batteries, and provides a battery support structure and a power battery, the battery support structure comprises: a support collet detachably arranged in a mounting groove; the supporting piece is connected to the support bottom support, and the supporting piece is used for abutting against the folding part under the condition that the support bottom support is arranged on the cover plate component. According to the battery bracket structure provided by the utility model, the battery bracket structure is arranged between the cover plate component and the roll core, so that the contact area between the cover plate component and the roll core is effectively increased, and the stability of the battery in the assembling and using processes is improved. And the support sheet can firmly abut against the folding part of the tab, so that the tab is prevented from displacement or deformation in the battery, and the risk of insertion of the tab is effectively avoided. And the bracket bottom support adopts a detachable design, so that the battery bracket structure can be flexibly selected and matched according to an actual production line system, the adaptability and the flexibility of the structure are improved, and the diversified requirements of different production lines on the battery bracket are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially relates to a battery support structure and power battery. BACKGROUND

[0002] In the battery manufacturing industry, the battery support as the key component of the battery assembly, its structure design is directly related to the safety performance, stability and production efficiency of the battery. The traditional battery support design often has the problem of insufficient contact area of the roll core and the cover member, which may cause safety hazards in the use process of the battery, such as poor contact, short circuit, etc. In addition, the tab as an important part of the battery, its installation and fixing mode also directly affect the performance and reliability of the battery. If the tab is improperly installed, it may cause internal insertion risk, that is, the tab is displaced or deformed in the battery, thereby affecting the current transmission efficiency and safety of the battery. SUMMARY

[0003] The utility model provides a battery support structure and power battery to solve the problem of insufficient contact area of the roll core and the cover member and the displacement or deformation of the tab in the battery in the prior art.

[0004] The utility model provides a battery support structure, the cover member and the roll core form installation groove between, be equipped with the tab with folding part in the installation groove, the battery support structure includes:

[0005] The bracket bottom support is detachably arranged in the installation groove;

[0006] The support sheet is connected to the bracket bottom support, and when the bracket bottom support is arranged on the cover member, the support sheet is used to abut against the folding part.

[0007] According to the battery support structure provided by the utility model, one of the bracket bottom support and the cover member is provided with a protrusion, and the other is provided with a positioning groove matched with the protrusion, and the bracket bottom support is connected in the installation groove through the protrusion and the positioning groove.

[0008] According to the battery support structure provided by the utility model, a plurality of protrusions are arranged on the bracket bottom support, and a plurality of positioning grooves corresponding to the protrusions are formed on the cover member, and the bracket bottom support is connected in the installation groove through the plurality of protrusions and the plurality of positioning grooves.

[0009] According to the battery support structure provided by the utility model, the installation groove is provided with a positive tab and a negative tab, and the positive tab and the negative tab both have the folding part;

[0010] The support sheet is provided with two, first support sheet and second support sheet, first support sheet and second support sheet are connected on the support bracket bottom, in the case that the support bracket bottom is arranged on the cover plate component, first support sheet is used for abutting against the folding part of the positive pole lug, and second support sheet is used for abutting against the folding part of the negative pole lug.

[0011] According to the battery support structure, the two sides of the support bracket bottom are provided with a first edge and a second edge, the cover plate component is provided with a first support position matched with the first edge and a second support position matched with the second edge

[0012] The support bracket bottom is slidably arranged on the first support position and the second support position through the first edge and the second edge on the two sides, so as to be slidably arranged in the mounting groove.

[0013] The utility model also provides a power battery, which comprises:

[0014] A cover plate component and a roll core are arranged, and a mounting groove is formed between the cover plate component and the roll core.

[0015] A pole lug is arranged in the mounting groove, and the pole lug has a folding part.

[0016] The battery support structure comprises a support bracket bottom and a support sheet, the support bracket bottom is detachably arranged in the mounting groove, and the support sheet is connected to the support bracket bottom, and in the case that the support bracket bottom is arranged on the cover plate component, the support sheet is used for abutting against the folding part.

[0017] According to the power battery, one of the support bracket bottom and the cover plate component is provided with a protrusion, the other is provided with a positioning groove matched with the protrusion, and the support bracket bottom is connected in the mounting groove through the protrusion and the positioning groove.

[0018] According to the power battery, a plurality of protrusions are arranged on the support bracket bottom, a plurality of positioning grooves corresponding to the protrusions are formed on the cover plate component, and the support bracket bottom is connected in the mounting groove through the plurality of protrusions and the plurality of positioning grooves.

[0019] According to the power battery, the mounting groove is provided with a positive pole lug and a negative pole lug, and the positive pole lug and the negative pole lug both have the folding part.

[0020] The support sheet is provided with two, first support sheet and second support sheet, first support sheet and second support sheet are connected on the support bracket, in the case that the support bracket is arranged on the cover plate component, the first support sheet is used for abutting against the folded part of the positive pole lug, and the second support sheet is used for abutting against the folded part of the negative pole lug.

[0021] According to the power battery provided by the utility model, the two sides of the support bracket are provided with a first edge and a second edge, the support bracket is provided with a first support position matched with the first edge and a second support position matched with the second edge;

[0022] The support bracket is slidably arranged on the first support position and the second support position through the first edge and the second edge on the two sides, so as to be slidably arranged in the mounting groove.

[0023] The battery support structure provided by the utility model sets the battery support structure between the cover plate component and the roll core, effectively increases the contact area between the cover plate component and the roll core, thereby improving the stability of the battery in the assembling and using process, and reducing the safety risk caused by poor contact or short circuit. The support sheet can firmly abut against the folded part of the pole lug, prevent the pole lug from being displaced or deformed in the battery, effectively avoid the risk of inserting the pole lug, and ensure the current transmission efficiency and safety of the battery. The support bracket adopts a detachable design, so that the battery support structure can be flexibly selected according to the actual production line system, improve the adaptability and flexibility of the structure, and meet the diversified needs of different production lines for the battery support. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0025] Figure 1 It is the structural schematic diagram of the power battery provided by the utility model.

[0026] Figure 2 It is the internal cross-section schematic diagram of the power battery provided by the utility model.

[0027] Figure 3 It is the schematic diagram in the installation process of the battery support structure provided by the utility model.

[0028] Figure 4 It is the schematic diagram of the cover plate component and the battery support structure provided by the utility model.

[0029] Reference signs:

[0030] 100, cover plate member; 1100, positioning groove; 1110, first support position; 1120, second support position; 200, roll core; 300, tab; 400, battery support structure; 410, support base; 4110, protrusion; 4120, first edge; 4130, second edge; 420, support sheet. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be clearly and completely described below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] The utility model provides a battery support structure 400 and a power battery, and the battery support structure 400 is arranged between a cover plate member 100 and a roll core 200 of the power battery. Figures 1-4 The power battery in the embodiment usually adopts a lithium battery.

[0033] The utility model provides a kind of battery support structure 400, as Figures 1 to 4 As shown in the drawing, mounting groove is formed between cover plate member 100 and roll core 200, tab 300 with folding portion is arranged in mounting groove, and battery support structure 400 includes: support base 410, which is detachably arranged in mounting groove;Support sheet 420 is connected on support base 410, and in the case that support base 410 is arranged in cover plate member 100, support sheet 420 is used to resist folding portion.

[0034] In the embodiment, support base 410 is detachably arranged in mounting groove. Support base 410 not only can provide additional support force, ensure the stability of battery assembly in mounting groove, but also can optimize the contact area between cover plate member 100 and roll core 200 by arranging support base 410 and support sheet in mounting groove, to improve the safety performance of battery. The detachable design of support base 410 makes battery support structure 400 more flexible, and it is convenient to select and match according to different production line requirements. Support sheet 420 is connected on support base 410, and its main role is to resist the folding portion of tab 300. Enough to ensure that tab 300 does not displace or deform during installation, thereby effectively avoiding the risk of tab 300 insertion. Support sheet 420 not only improves the safety of battery, but also ensures the current transmission efficiency of battery.

[0035] The battery support structure 400 provided by the embodiment of the utility model, through setting battery support structure 400 between cover plate component 100 and roll core 200, effectively increase the contact area between cover plate component 100 and roll core 200, thereby improve the stability of battery in the process of assembling and using, reduce the security risk caused by poor contact or short circuit.Support sheet 420 can firmly resist the folding part of pole lug 300, prevent pole lug 300 from displacement or deformation in the battery, effectively avoid the risk of pole lug 300 insertion, ensure the current transmission efficiency and safety of battery.The detachable design of support bottom bracket 410 makes the battery support structure 400 can be flexibly selected according to the actual production line system, improve the adaptability and flexibility of structure, meet the diversified demand of different production line to battery support.

[0036] In some embodiments, as shown in Figures 1 to 4 One of the support bottom bracket 410 and the cover plate component 100 is provided with a protrusion 4110, and the other is provided with a positioning groove 1100 matched with the protrusion 4110, and the support bottom bracket 410 is connected in the mounting groove through the protrusion 4110 and the positioning groove 1100.

[0037] In this embodiment, one of the support bottom bracket 410 and the cover plate component 100 (for example, the support bottom bracket 410) is provided with a protrusion 4110, and the other (for example, the cover plate component 100) is provided with a positioning groove 1100 matched with the protrusion 4110. The support bottom bracket 410 is stably connected in the mounting groove through the precise matching of the protrusion 4110 and the positioning groove 1100. This connection mode not only ensures the firmness of the support bottom bracket 410, but also greatly simplifies the installation process and improves the production efficiency. The setting of the protrusion 4110 and the positioning groove 1100 avoids the deviation or misplacement of the support bottom bracket 410 in the installation process, thereby ensuring the stability and safety of the battery assembly.

[0038] The operator only needs to align the protrusion 4110 of the support bottom bracket 410 with the positioning groove 1100 of the cover plate component 100, and then gently push it in. This installation method not only saves time, but also reduces the installation difficulty. In addition, the setting of the protrusion 4110 and the positioning groove 1100 enhances the connection strength between the support bottom bracket 410 and the cover plate component 100, thereby improving the overall stability of the battery support structure 400. The improvement of this stability helps to reduce the risk of damage of the battery in the vibration or impact environment.

[0039] In some embodiments, as shown in Figures 1 to 4 The support bottom bracket 410 is connected in the mounting groove through the plurality of protrusions 4110 and the plurality of positioning grooves 1100.

[0040] Specifically, the bracket base 410 has multiple (e.g., three) protrusions 4110 evenly distributed on it to ensure stability and balance within the mounting groove. The cover plate member 100 has multiple (also three) positioning grooves 1100 corresponding one-to-one with these protrusions 4110. The shape, size, and position of these positioning grooves 1100 perfectly match the protrusions 4110, ensuring precise installation of the bracket base 410 onto the cover plate member 100. The bracket base 410 is securely connected to the mounting groove through the precise fit of the multiple protrusions 4110 and the multiple positioning grooves 1100. This connection method not only enhances the connection strength between the bracket base 410 and the cover plate member 100 but also improves the overall stability of the battery bracket structure 400.

[0041] The combination of multiple protrusions 4110 and positioning grooves 1100 makes the installation of the bracket base 410 simpler and faster. The operator simply aligns the protrusions 4110 on the bracket base 410 with the positioning grooves 1100 on the cover plate component 100, and then gently pushes it in. This installation method not only saves time but also reduces installation difficulty and the error rate.

[0042] In some embodiments, such as Figures 1 to 4 As shown, the mounting groove is provided with a positive electrode ear and a negative electrode ear, both of which have folded portions; there are two support plates 420, namely a first support plate and a second support plate, both of which are connected to the bracket base 410. When the bracket base 410 is provided on the cover plate member 100, the first support plate is used to abut the folded portion of the positive electrode ear, and the second support plate is used to abut the folded portion of the negative electrode ear.

[0043] The mounting slot contains positive and negative tabs, both of which have folded sections. The folded sections help to better adapt to spatial layout during battery assembly and also facilitate the connection of the tabs 300 to other internal battery components.

[0044] To ensure that the folded portions of the positive and negative tabs do not shift or deform during installation, a first support plate and a second support plate are provided. Both the first and second support plates are securely connected to the bracket base 410, providing stable support for the folded portions of the tabs 300. When the bracket base 410 is positioned on the cover plate member 100, the first support plate abuts against the folded portion of the positive tab, while the second support plate abuts against the folded portion of the negative tab. This design ensures that the tabs 300 maintain the correct position and shape during installation, thereby avoiding the risk of the tabs 300 being inserted internally and guaranteeing the battery's current transmission efficiency and safety.

[0045] Based on the above embodiments, in some embodiments, as Figures 1 to 4 As shown in FIG. 10, the two sides of the bracket base 410 are provided with a first edge 4120 and a second edge 4130, and the cover plate member 100 is provided with a first support position 1110 adapted to the first edge 4120 and a second support position 1120 adapted to the second edge 4130; the bracket base 410 is slidably arranged on the first support position 1110 and the second support position 1120 through the first edge 4120 and the second edge 4130 on the two sides, so that the bracket base 410 is slidably arranged in the mounting groove.

[0046] Specifically, the first edge 4120 and the second edge 4130 are arranged on the two sides of the bracket base 410. The first edge 4120 and the second edge 4130 provide the necessary guidance and limiting action for the sliding installation of the bracket base 410 in the mounting groove.

[0047] Meanwhile, the first support position 1110 adapted to the first edge 4120 and the second support position 1120 adapted to the second edge 4130 are arranged at the corresponding positions of the mounting groove. The first support position 1110 and the second support position 1120 ensure that the bracket base 410 can stably and smoothly slide in the mounting groove.

[0048] The bracket base 410 is slidably arranged on the first support position 1110 and the second support position 1120 through the first edge 4120 and the second edge 4130 on the two sides. This design enables the bracket base 410 to move and adjust the position flexibly in the mounting groove, thereby meeting the needs of different battery assemblies and layouts. The realization of sliding installation not only simplifies the battery assembly process, but also improves the assembly efficiency and flexibility. The operator only needs to gently push the bracket base 410 to move it to the desired position without using any additional tools or equipment.

[0049] The embodiment of the present application provides a power battery, as shown in Figures 1 to 4 The power battery comprises a cover plate member 100, a roll core 200, a tab 300, and a battery bracket structure 400. A mounting groove is formed between the cover plate member 100 and the roll core 200, the tab 300 with a folding part is arranged in the mounting groove, and the battery bracket structure 400 comprises a bracket base 410 which is detachably arranged in the mounting groove, and a support sheet 420 which is connected to the bracket base 410 and is used to abut against the folding part when the bracket base 410 is arranged on the cover plate member 100.

[0050] In the embodiment, the bracket base 410 is detachably arranged in the mounting groove. The bracket base 410 can not only provide additional support force to ensure the stability of the battery assembly in the mounting groove, but also can optimize the contact area between the cover plate member 100 and the winding core 200 by arranging the bracket base 410 and the support sheet in the mounting groove, thereby improving the safety performance of the battery. The detachable design of the bracket base 410 makes the battery bracket structure 400 more flexible, and facilitates the selection according to different production line requirements. The support sheet 420 is connected to the bracket base 410, and the main function of the support sheet 420 is to resist the folded part of the tab 300. It can ensure that the tab 300 will not be displaced or deformed during the installation process, thereby effectively avoiding the risk of inserting the tab 300. The support sheet 420 not only improves the safety of the battery, but also ensures the current transmission efficiency of the battery.

[0051] The power battery provided in the embodiment of the utility model, through setting battery bracket structure 400 between cover plate member 100 and winding core 200, effectively increased the contact area between cover plate member 100 and winding core 200, thereby improved the stability of battery in the process of assembling and using, reduced the security risk caused by bad contact or short circuit. The support sheet 420 can firmly resist the folded part of the tab 300, prevent the tab 300 from being displaced or deformed inside the battery, effectively avoid the risk of inserting the tab 300, ensure the current transmission efficiency and safety of the battery. The bracket base 410 adopts detachable design, so that the battery bracket structure 400 can be flexibly selected according to the actual production line system, improve the adaptability and flexibility of the structure, meet the diversified needs of different production lines for the battery bracket.

[0052] In some embodiments, as shown in Figures 1 to 4 One of the bracket base 410 and the cover plate member 100 is provided with a protrusion 4110, and the other is provided with a positioning groove 1100 matched with the protrusion 4110, and the bracket base 410 is connected in the mounting groove through the protrusion 4110 and the positioning groove 1100.

[0053] In the embodiment, one of the bracket base 410 and the cover plate member 100 (for example, the bracket base 410) is provided with a protrusion 4110, and the other (for example, the cover plate member 100) is provided with a positioning groove 1100 matched with the protrusion 4110. The bracket base 410 is stably connected in the mounting groove through the precise matching of the protrusion 4110 and the positioning groove 1100. This connection mode not only ensures the firmness of the bracket base 410, but also greatly simplifies the installation process and improves the production efficiency. The arrangement of the protrusion 4110 and the positioning groove 1100 avoids the deviation or misplacement of the bracket base 410 during the installation process, thereby ensuring the stability and safety of the battery assembly.

[0054] The operator only needs to align the protrusions 4110 of the bracket base 410 with the positioning slots 1100 of the cover member 100 and then gently push them in. This installation method not only saves time but also reduces the installation difficulty. In addition, the arrangement of the protrusions 4110 and the positioning slots 1100 enhances the connection strength between the bracket base 410 and the cover member 100, thereby improving the overall stability of the battery bracket structure 400. The improvement of this stability helps to reduce the risk of damage to the battery in a vibration or impact environment.

[0055] In some embodiments, as shown in Figures 1 to 4 The bracket base 410 is connected in the installation slot through the plurality of protrusions 4110 and the plurality of positioning slots 1100.

[0056] Specifically, the bracket base 410 is provided with a plurality of (for example, three) protrusions 4110, which are uniformly distributed on the bracket base 410 to ensure the stability and balance of the bracket base 410 in the installation slot. The cover member 100 is formed with a plurality of (also three) positioning slots 1100 corresponding to the protrusions 4110. The shape, size and position of the positioning slots 1100 are completely matched with the protrusions 4110 to ensure that the bracket base 410 can be accurately installed on the cover member 100. The bracket base 410 is firmly connected in the installation slot through the accurate matching of the plurality of protrusions 4110 and the plurality of positioning slots 1100. This connection method not only enhances the connection strength between the bracket base 410 and the cover member 100, but also improves the overall stability of the battery bracket structure 400.

[0057] The matching of the plurality of protrusions 4110 and the positioning slots 1100 makes the installation of the bracket base 410 more simple and fast. The operator only needs to align the protrusions 4110 on the bracket base 410 with the positioning slots 1100 on the cover member 100 and then gently push them in. This installation method not only saves time but also reduces the installation difficulty and error rate.

[0058] In some embodiments, as shown in Figures 1 to 4 The installation slot is provided with a positive electrode lug and a negative electrode lug, and the positive electrode lug and the negative electrode lug each have a folding portion; the support sheet 420 is provided with two, which are a first support sheet and a second support sheet, and the first support sheet and the second support sheet are connected to the bracket base 410. In the case where the bracket base 410 is arranged on the cover member 100, the first support sheet is used to abut against the folding portion of the positive electrode lug, and the second support sheet is used to abut against the folding portion of the negative electrode lug.

[0059] In the installation groove, the positive and negative tabs are arranged, and both of the tabs 300 have folding parts. The design of the folding parts helps to better adapt to the spatial layout during battery assembly, and also facilitates the connection of the tabs 300 with other components inside the battery.

[0060] In order to ensure that the folding parts of the positive and negative tabs do not displace or deform during installation, first and second support pieces are provided. Both the first and second support pieces are firmly connected to the bracket bottom support 410, providing stable support for the folding parts of the tabs 300. In the case where the bracket bottom support 410 is arranged on the cover plate member 100, the first support piece will abut against the folding part of the positive tab, and the second support piece will abut against the folding part of the negative tab. This design ensures that the tabs 300 can maintain the correct position and shape during installation, thereby avoiding the risk of tab 300 insertion and ensuring the current transmission efficiency and safety of the battery.

[0061] Based on the above embodiments, in some embodiments, as shown in Figures 1 to 4 The two sides of the bracket bottom support 410 are provided with a first edge 4120 and a second edge 4130, and the cover plate member 100 is provided with a first support position 1110 adapted to the first edge 4120 and a second support position 1120 adapted to the second edge 4130; the bracket bottom support 410 is slidably arranged on the first support position 1110 and the second support position 1120 through the first edge 4120 and the second edge 4130 on both sides, so that the bracket bottom support 410 is slidably arranged in the installation groove.

[0062] Specifically, on both sides of the bracket bottom support 410, a first edge 4120 and a second edge 4130 are arranged. The first edge 4120 and the second edge 4130 provide the necessary guidance and limiting action for the sliding installation of the bracket bottom support 410 in the installation groove.

[0063] At the same time, at the corresponding position of the installation groove, a first support position 1110 adapted to the first edge 4120 and a second support position 1120 adapted to the second edge 4130 are arranged. The first support position 1110 and the second support position 1120 ensure that the bracket bottom support 410 can slide stably and smoothly in the installation groove.

[0064] The bracket bottom support 410 is slidably arranged on the first support position 1110 and the second support position 1120 through the first edge 4120 and the second edge 4130 on both sides. This design allows the bracket bottom support 410 to move and adjust its position flexibly in the installation groove, thereby meeting the needs of different battery assembly and layout. The realization of sliding installation not only simplifies the battery assembly process, but also improves the assembly efficiency and flexibility. The operator only needs to gently push the bracket bottom support 410 to move it to the desired position without using any additional tools or equipment.

[0065] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery holder structure (400) characterized by, A mounting groove is formed between the cover plate member (100) and the roll core (200), and a tab (300) having a folded portion is arranged in the mounting groove, and the battery holder structure (400) comprises: a holder base (410) which is detachably arranged in the mounting groove; a support sheet (420) which is connected to the holder base (410) and is used to abut against the folded portion when the holder base (410) is arranged on the cover plate member (100).

2. The battery support structure (400) of claim 1, wherein, One of the holder base (410) and the cover plate member (100) is provided with a protrusion (4110), and the other is provided with a positioning groove (1100) which is matched with the protrusion (4110), and the holder base (410) is connected in the mounting groove through the protrusion (4110) and the positioning groove (1100).

3. The battery holder structure (400) according to claim 2, characterized in that A plurality of protrusions (4110) are arranged on the holder base (410), and a plurality of positioning grooves (1100) which are matched with the protrusions (4110) are formed on the cover plate member (100), and the holder base (410) is connected in the mounting groove through the plurality of protrusions (4110) and the plurality of positioning grooves (1100).

4. The battery support structure (400) of claim 1, wherein, The mounting groove is arranged with a positive tab and a negative tab, and the positive tab and the negative tab both have the folded portion; The support sheet (420) is provided with two first and second support sheets which are both connected to the holder base (410) and are used to abut against the folded portion of the positive tab and the negative tab respectively when the holder base (410) is arranged on the cover plate member (100).

5. The battery holder structure (400) according to any one of claims 1-4, characterized in that, The holder base (410) is provided with a first edge (4120) and a second edge (4130) on both sides, and the cover plate member (100) is provided with a first support position (1110) which is matched with the first edge (4120) and a second support position (1120) which is matched with the second edge (4130); The holder base (410) is slidably arranged on the first support position (1110) and the second support position (1120) through the first edge (4120) and the second edge (4130) on both sides to be slidably arranged in the mounting groove.

6. A power cell, characterized by Comprise: a cover plate member (100) and a roll core (200), a mounting groove is formed between the cover plate member (100) and the roll core (200); a tab (300) which is arranged in the mounting groove, the tab (300) having a folded portion; a battery holder structure (400) comprising a holder base (410) and a support sheet (420), the holder base (410) being detachably arranged in the mounting groove; the support sheet (420) being connected to the holder base (410) and being used to abut against the folded portion when the holder base (410) is arranged on the cover plate member (100).

7. The power cell of claim 6, wherein, One of the bracket base (410) and the cover plate component (100) is provided with a protrusion (4110), and the other is provided with a positioning groove (1100) matched with the protrusion (4110), and the bracket base (410) is connected in the mounting groove through the protrusion (4110) and the positioning groove (1100).

8. The power cell of claim 7, wherein, A plurality of protrusions (4110) are arranged on the bracket base (410), and a plurality of positioning grooves (1100) corresponding to the protrusions (4110) are formed on the cover plate component (100), and the bracket base (410) is connected in the mounting groove through the plurality of protrusions (4110) and the plurality of positioning grooves (1100).

9. The power cell of claim 6, wherein, The mounting groove is provided with a positive electrode lug and a negative electrode lug, and the positive electrode lug and the negative electrode lug each have the folding part; The support piece (420) is provided with two first support pieces and second support pieces, and the first support piece and the second support piece are connected to the bracket base (410), and in the case that the bracket base (410) is arranged on the cover plate component (100), the first support piece is used to abut against the folding part of the positive electrode lug, and the second support piece is used to abut against the folding part of the negative electrode lug.

10. The power cell of any one of claims 6-9, wherein, The bracket base (410) is provided with a first edge (4120) and a second edge (4130) on both sides, and the bracket base (410) is provided with a first support position (1110) matched with the first edge (4120) and a second support position (1120) matched with the second edge (4130); The bracket base (410) is slidably arranged on the first support position (1110) and the second support position (1120) through the first edge (4120) and the second edge (4130) on both sides, so as to be slidably arranged in the mounting groove.

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