Battery and power consuming device

Abstract

The application relates to the battery technical field and particularly discloses a battery and a power utilization device, wherein the battery comprises a shell, a battery cell and a retainer. The battery cell is arranged in the shell and has a plurality of tabs which are gathered and form a tab group; the retainer is arranged in the shell and comprises a support body and a folding piece which are connected, the folding piece can be folded relative to the support body and form a gathering cavity, and the tab group is stacked and gathered in the gathering cavity; the folding piece is provided with a thinning groove which is located on a side facing away from the gathering cavity. In the application, the thinning groove is arranged on the side of the folding piece facing away from the gathering cavity, the slotting space is sufficient and the depth is easy to control; meanwhile, the thinning groove is located on a non-contact side, the contact area of the tab group and the bending part is reduced, and excessive extrusion of the tab group on the retainer during welding is prevented to prevent scorching; the folding piece is connected with the support body and can be folded to form the gathering cavity, so that the redundant part of the tab group is stably gathered.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and specifically discloses a battery and an electrical device. Background Technology

[0002] In some batteries, after the tabs are welded to the terminals, there is still a redundant portion at the end of the tab. This necessitates the use of a bendable retainer to fold and retract this redundant portion. Specifically, the bending section of the retainer typically features a thinning groove to facilitate the bending operation.

[0003] However, the existing partial retainers have thinning grooves facing inward in the bending direction, making grooving difficult and the groove depth hard to control. In addition, some retainers also have bosses at the thinning grooves, which makes the contact area between the tab and the bending part larger. When welding the tab, the tab will excessively squeeze the bending part of the retainer, which can easily cause the bending part to heat up. Utility Model Content

[0004] This application provides a battery and an electrical device to at least solve the problem of excessive pressure on the cage bending portion caused by the tabs.

[0005] In a first aspect, this application provides a battery, including a casing, a cell, and a retainer. The cell is disposed inside the casing and has multiple tabs, which are folded together to form a tab assembly. The retainer is disposed inside the casing and includes a support body and a folding member connected to each other. The folding member can be folded relative to the support body to form a folding cavity, and the tab assembly is stacked and folded within the folding cavity. The folding member has a thinning groove located on the side opposite to the folding cavity.

[0006] Secondly, this application also provides an electrical device, including the battery of the first aspect.

[0007] This application has at least the following beneficial effects: In this application, by setting the thinning groove on the "side facing away from the closing cavity" of the folded part (i.e., the outer side that is not in contact with the electrode tabs), the traditional grooving method facing the inner side of the bend is changed, solving the problems of difficult processing and depth control of the inner side grooving; Specifically, the outer side grooving has sufficient space, good tool accessibility, and easy depth control; At the same time, the thinning groove is located on the non-contact surface, avoiding the formation of bosses, reducing the contact area between the electrode tab assembly and the bending part, and preventing the electrode tab assembly from excessively squeezing the retainer during welding, which would cause it to overheat; The folded part is connected to the bracket body and can be folded to form a closing cavity, realizing the stable closing of the redundant part of the electrode tab assembly. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the overall structure of the battery proposed in some embodiments of this application; Figure 2 This is a partial cross-sectional structural diagram of the battery proposed in some embodiments of this application (the cage is in a folded state). Figure 3 for Figure 2 A magnified structural diagram at point A; Figure 4 This is a first isometric view of the cage proposed in some embodiments of this application (the cage is in the unfolded state). Figure 5 for Figure 4 A magnified structural diagram at point B; Figure 6 This is a second isometric schematic diagram of the cage proposed in some embodiments of this application (the cage is in the unfolded state).

[0010] Explanation of reference numerals in the attached figures: 10. Housing; 20. Cell; 201. Electrode assembly; 2011. Welding part; 2012. Folding part; 30. Cage; 301. Support body; 3011. Main plate; 3012. Support part; 3013. Locking block protrusion; 302. Folding part; 3021. Connecting part; 3022. Supporting part; 3023. First plate; 3024. Second plate; 3025. Slot; 303. Closing cavity; 304. Thinning groove; 40. Electrode post; 50. Soldering flux. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0012] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0013] According to the embodiments of this application, and referring to Figures 1 to 5 In a first aspect, a battery is provided, comprising a housing 10, a cell 20, and a retainer 30. The cell 20 is disposed inside the housing 10 and has multiple tabs, which are folded together to form a tab assembly 201. The retainer 30 is disposed inside the housing 10 and includes a support body 301 and a folding member 302 connected to each other. The folding member 302 can be folded relative to the support body 301 to form a folding cavity 303, in which the tab assembly 201 is stacked and folded together. The folding member 302 is provided with a thinning groove 304, which is located on the side opposite to the folding cavity 303.

[0014] In this embodiment, by setting the thinning groove 304 on the side of the folded part 302 facing away from the gathering cavity 303 (i.e., the outer side that is not in contact with the tabs), the traditional grooving method facing the inner side of the bend is changed, which solves the problems of difficult processing and difficult depth control of the inner side grooving. Specifically, the outer side grooving has sufficient space, good tool accessibility, and easy depth control. At the same time, the thinning groove 304 is located on the non-contact surface, avoiding the formation of bosses, reducing the contact area between the tab assembly 201 and the bending part, and preventing the tab assembly 201 from excessively squeezing the retainer 30 during welding, which would cause it to overheat. The folded part 302 is connected to the bracket body 301 and can be folded to form the gathering cavity 303, realizing the stable gathering of the redundant part of the tab assembly 201.

[0015] In some embodiments, refer to Figures 2 to 5 The thinning groove 304 is located at the connection between the folding member 302 and the bracket body 301.

[0016] In this embodiment, the thinning groove 304 is located at the "connection" (key part of folding) between the folding member 302 and the support body 301, precisely weakening the rigidity of the connection to achieve smooth folding; the connection is usually a narrow area, and setting a groove here can reduce the amount of material removed and improve processing efficiency; at the same time, as the connection is near the folding axis, thinning can reduce the folding resistance, ensuring that the folding member 302 is stably folded relative to the support body 301 to form the gathering cavity 303, improving the reliability of the construction of the gathering cavity 303.

[0017] In some embodiments, refer to Figure 3 and Figure 5 The cross-sectional shape of the thinning groove 304 is V-shaped or semi-circular.

[0018] In this embodiment, the V-shaped cross-section is easy to process (easy to form by milling / stamping), and the sharp bottom of the groove facilitates concentrated thinning, resulting in less stress concentration during folding; the semi-circular cross-section has a smooth transition, avoiding stress concentration that could lead to breakage of the connection part 3021. Both shapes maintain the structural strength of the connection part 3021 while ensuring ease of folding, improving the durability of the retainer 30, and preventing failure due to excessive or insufficient thinning.

[0019] In some embodiments, refer to Figure 2 , Figure 4 and Figure 6 The folding member 302 includes a connecting part 3021 and a support member 3022. The connecting part 3021 connects the support member 3022 and the bracket body 301. The thinning groove 304 is provided in the connecting part 3021. The connecting part 3021 has an arc-shaped structure. The support member 3022 and the bracket body 301 are spaced apart and form a folding cavity 303.

[0020] In this embodiment, the connecting part 3021, with its "arc-shaped structure," possesses inherent flexibility. Combined with the thinning groove 304, it further reduces bending stiffness, making folding smoother. The "support member 3022 and the bracket body 301 are spaced apart," clearly defining the space of the folding cavity 303 and ensuring the stability of the stacked and folded tab assembly 201. The thinning groove 304 is located on the arc-shaped connecting part 3021, utilizing the deformation coordination of the arc-shaped structure to enhance structural adaptability during folding and avoid excessive local stress leading to breakage.

[0021] In some embodiments, the thickness of the connecting portion 3021 is d1mm, the depth of the thinning groove 304 is d2mm, and the condition 0.4≤d2 / d1≤0.6 is satisfied.

[0022] In this embodiment, the d2 / d1 ratio is limited to balance the ease of folding and structural strength. When d2 / d1 < 0.4, the thinning will be insufficient and folding will be difficult; when d2 / d1 > 0.6, the remaining thickness of the connecting part 3021 is too small and it is easy to break. This range ensures that the connecting part 3021 can still maintain reliable strength after thinning, while significantly reducing the folding resistance.

[0023] Specifically, d2 / d1 can take any one of the values ​​of 0.4, 0.45, 0.5, 0.55, and 0.6, or fall within the range of any two of these values.

[0024] In some embodiments, the thickness d1mm of the connecting portion 3021 satisfies 0.3mm≤d1mm≤0.6mm.

[0025] In this embodiment, the overall thickness of the connecting portion 3021 is within the range of 0.3mm to 0.6mm. This avoids the initial strength being insufficient and easily deformed due to being too thin (<0.3mm), or the folding resistance being too large due to being too thick (>0.6mm). This thickness ensures basic strength and, together with the thinning groove 304, enables controllable folding, thereby improving the overall structural stability of the cage 30.

[0026] Specifically, d1mm can be any one of 0.3mm, 0.4mm, 0.5mm and 0.6mm or fall within the range of any two of these values.

[0027] In some embodiments, the depth d2mm of the thinning groove 304 satisfies 0.15mm≤d2mm≤0.3mm.

[0028] In this embodiment, the depth is in the range of 0.15mm to 0.3mm to avoid being too shallow (<0.15mm) resulting in ineffective thinning and difficulty in folding, or too deep (>0.3mm) causing the remaining thickness of the connecting part 3021 to be too small. This depth can effectively reduce the folding stiffness and prevent the connecting part 3021 from breaking.

[0029] Specifically, d2mm can be any one of 0.15mm, 0.2mm, 0.25mm and 0.3mm or a range between any two of these values.

[0030] In some embodiments, refer to Figure 2 , Figure 4 and Figure 6 The support member 3022 includes a first plate 3023 and a second plate 3024 arranged at an angle. The first plate 3023 is arranged opposite to the bracket body 301, and the first plate 3023 and the bracket body 301 limit the tab assembly 201. The second plate 3024 is close to one end of the tab assembly 201 that leads out from the cell 20.

[0031] In this embodiment, the first plate 3023 and the bracket body 301 are "relatively set" to form a limiting structure to prevent the tab assembly 201 from shifting; the second plate 3024 is close to or abuts against one end of the lead-out tab assembly 201 of the battery cell 20 to fix the position of the tab assembly 201; the two are "set at an angle" to form a three-dimensional support, which enhances the clamping stability of the gathering cavity 303 on the tab assembly 201, avoids the tab assembly 201 from loosening, and improves the gathering effect.

[0032] In some embodiments, refer to Figure 6 The first plate 3023 and the bracket body 301 are provided with a locking protrusion 3013 and the other is provided with a locking groove 3025, and the locking protrusion 3013 and the locking groove 3025 are engaged.

[0033] In this embodiment, the support member 3022 and the bracket body 301 are detachably / securely connected by the "locking block protrusion 3013 and the locking groove 3025". This prevents the support member 3022 from shifting after the folding member 302 is folded, and ensures the structural stability of the folding cavity 303. The locking structure facilitates assembly and positioning, and improves assembly efficiency.

[0034] In some embodiments, refer to Figure 4 and Figure 6The support body 301 includes a main plate 3011 and two support parts 3012 connected to both ends of the main plate 3011. A folding member 302 is disposed between the two support parts 3012. At least part of the structure of the main plate 3011 corresponds to the first plate 3023. The electrode assembly 201 is disposed between the main plate 3011 and the first plate 3023.

[0035] In this embodiment, the "two support parts 3012" limit the installation space of the folding member 302 to ensure that it folds in the preset position; the "at least part of the structure of the main body plate 3011 corresponds to the first plate 3023" to form the receiving space of the tab assembly 201; the two end support parts 3012 and the middle folding member 302 cooperate to build a stable frame, improve the overall rigidity of the retainer 30, and prevent the shrinking cavity 303 from deforming.

[0036] In some embodiments, refer to Figure 2 The battery also includes a terminal post 40, which is located on the main body plate 3011 and is electrically connected to the tab assembly 201 through the main body plate 3011.

[0037] In this embodiment, "the pole post 40 is limited to the main body plate 3011" to ensure accurate welding position; "the pole post 40 passes through the main body plate 3011 and is electrically connected to the electrode lug group 201" to shorten the current path and reduce internal resistance; the main body plate 3011 acts as a limiting structure to prevent the pole post 40 from shaking and improve the reliability of electrical connection.

[0038] In some embodiments, refer to Figure 2 The tab assembly 201 includes a welding part 2011 and a folding part 2012. The folding part 2012 is connected to the end of the welding part 2011 away from the cell 20. The welding part 2011 is close to the main plate 3011 and welded to the pole post 40. The folding part 2012 is folded towards the side close to the first plate 3023.

[0039] In this embodiment, the "welding part 2011 close to the main body plate 3011" facilitates the welding operation with the pole post 40; the "folding part 2012 folds towards the side close to the first plate 3023" (i.e. enters the folding cavity 303) to realize the folding of the redundant part; the partition design of the welding part 2011 (welding function) and the folding part 2012 (folding function) is clearly defined to improve the orderliness of the folding of the pole lug assembly 201.

[0040] In some embodiments, refer to Figure 2 The battery also includes a soldering sheet 50, which is located between the welding part 2011 and the folding part 2012, and is connected to the welding part 2011.

[0041] In this embodiment, the flux sheet 50 is located between the welding part 2011 and the folding part 2012 and is connected to the welding part 2011. This not only enhances the welding strength between the welding part 2011 and the pole post 40 (reducing incomplete welds), but also guides the folding part 2012 to be subjected to uniform force when folding, avoiding pulling the welding part 2011 and causing detachment, thus improving the structural stability of the welding part 2011.

[0042] In some embodiments, refer to Figure 2 The welding part 2011 and the folding part 2012 are spaced apart, and the gap between them is greater than the thickness of the welding flux 50.

[0043] In this embodiment, "the gap is greater than the thickness of the flux sheet 50" ensures that after the flux sheet 50 is installed, there is still room for movement between the welding part 2011 and the folding part 2012; when folding, the folding part 2012 can move slightly relative to the welding part 2011 without squeezing the flux sheet 50, thus preventing the flux sheet 50 from falling off or deforming, and ensuring the fluxing effect and folding smoothness.

[0044] Secondly, embodiments of this application provide an electrical device that includes the battery of the first aspect. Therefore, the electrical device of the second aspect possesses all the technical effects of the battery of the first aspect, the specific technical effects of which will not be elaborated further. It should be understood that the electrical device includes other components besides the battery, which will not be described in detail here.

[0045] It should be noted that battery devices can serve as the operating power source for electrical devices, or as the driving power source for electrical devices, replacing or partially replacing fuel or natural gas to provide propulsion for vehicles. Electrical devices include devices in a wide range of technological fields such as energy storage equipment, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric cars, military equipment, and aerospace.

[0046] In particular, the term "and / or" in this application should be understood as follows: In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0047] In the second case, the term "and / or" between the last two of three or more subjects means that at least one of the subjects is included. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject; Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0048] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that, include: Shell (10); The battery cell (20) is located inside the housing (10) and has multiple tabs, which are brought together to form a tab group (201). The retainer (30) is located inside the housing (10) and includes a support body (301) and a folding member (302) connected to each other. The folding member (302) can be folded relative to the support body (301) to form a folding cavity (303). The tab assembly (201) is stacked and folded in the folding cavity (303). The folding member (302) is provided with a thinning groove (304), which is located on the side facing away from the folding cavity (303).

2. The battery according to claim 1, characterized in that, The thinning groove (304) is located at the connection between the folding member (302) and the support body (301).

3. The battery according to claim 1, characterized in that, The cross-sectional shape of the thinning groove (304) is V-shaped or semi-circular.

4. The battery according to claim 1, characterized in that, The folding member (302) includes a connecting part (3021) and a support member (3022). The connecting part (3021) connects the support member (3022) and the bracket body (301). The thinning groove (304) is provided on the connecting part (3021). The connecting part (3021) has an arc-shaped structure. The support member (3022) is spaced apart from the bracket body (301) and forms a folding cavity (303).

5. The battery according to claim 4, characterized in that, The thickness of the connecting part (3021) is d1mm, the depth of the thinning groove (304) is d2mm, and the condition 0.4≤d2 / d1≤0.6 is satisfied.

6. The battery according to claim 5, characterized in that, The thickness d1mm of the connecting part (3021) satisfies 0.3mm≤d1mm≤0.6mm.

7. The battery according to claim 5, characterized in that, The depth d2mm of the thinning groove (304) satisfies 0.15mm≤d2mm≤0.3mm.

8. The battery according to claim 4, characterized in that, The support member (3022) includes a first plate (3023) and a second plate (3024) arranged at an angle. The first plate (3023) is arranged opposite to the bracket body (301), and the first plate (3023) and the bracket body (301) limit the tab assembly (201). The second plate (3024) leads out one end of the tab assembly (201) near the battery cell (20).

9. The battery according to claim 8, characterized in that, The first plate (3023) and the bracket body (301) are provided with a locking protrusion (3013) and the other is provided with a locking groove (3025), and the locking protrusion (3013) and the locking groove (3025) are engaged.

10. The battery according to claim 8, characterized in that, The support body (301) includes a main plate (3011) and two support parts (3012) connected to both ends of the main plate (3011). The folding member (302) is disposed between the two support parts (3012). At least part of the structure of the main plate (3011) corresponds to the first plate (3023). The tab assembly (201) is disposed between the main plate (3011) and the first plate (3023).

11. The battery according to claim 10, characterized in that, The battery also includes a terminal post (40) which is located on the main body plate (3011) and is electrically connected to the tab assembly (201) through the main body plate (3011).

12. The battery according to claim 11, characterized in that, The electrode assembly (201) includes a welding part (2011) and a folding part (2012). The folding part (2012) is connected to the end of the welding part (2011) away from the battery cell (20). The welding part (2011) is close to the main plate (3011) and welded to the electrode post (40). The folding part (2012) is folded towards the side close to the first plate (3023).

13. The battery according to claim 12, characterized in that, The battery also includes a soldering tab (50) located between the welding portion (2011) and the folding portion (2012), and the soldering tab (50) is connected to the welding portion (2011).

14. The battery according to claim 13, characterized in that, The welding part (2011) and the folding part (2012) are spaced apart, and the gap between them is greater than the thickness of the welding flux (50).

15. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 14.

Images