Protective member and battery

Abstract

The utility model relates to new energy battery technical field, specifically provide a protection part and battery. The utility model discloses protection part is used between the isolation protection of battery cover plate and pole group, this protection part includes the main part that sets up with the shape of the battery cover plate shape, and the protection part that sets up in the side of main part width direction. Among them, the main part is equipped with the pole post via hole that the pole post on battery cover plate passes, and the protection part sets up correspondingly, and is connected on the main part through the bendable connecting part, the protection part is equipped with hot melt connecting part, and the main part correspondingly sets up hot melt part, in the case that the main part is pasted in the inboard of battery cover plate, with the bending of connecting part, hot melt connecting part can hot melt solid link on hot melt part, and make the protection part form the covering of the welding part of the pole lug and pole post from pole group. The protection part of the utility model can form the stable and reliable isolation protection of the welding part of the pole lug and pole post of battery.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a protective component. Additionally, this utility model also relates to a battery. Background Technology

[0002] With the development of new energy technologies, lithium-ion batteries, as a typical example, are widely used in new energy vehicles due to their excellent energy storage and safety.

[0003] During battery manufacturing, the electrode assembly located inside the battery casing needs to have tabs extended from it. These tabs, of the same polarity, are then welded to terminals on the cover plate to establish electrical connection between the battery and external electrical components. The welding of the tabs to the terminals is one of the key processes in battery production, and its quality directly affects the battery's safety and reliability.

[0004] In an electrode assembly, the separator is a crucial component for isolating the positive and negative electrodes. If there are protrusions or fallen weld slag at the welding points of the tabs and terminals, these could puncture the electrode assembly, posing a significant risk to the safe operation of the separator and electrodes. For example, if the separator is punctured by weld slag, the positive and negative electrodes will be directly connected, creating a short circuit. The high temperatures generated by this short circuit can trigger a chain reaction inside the battery, leading to electrolyte decomposition, electrode material decomposition, and ultimately thermal runaway. Thermal runaway can not only damage the battery but also threaten the safety of the vehicle, personnel, and the surrounding environment. Utility Model Content

[0005] In view of this, the present invention aims to provide a protective component to provide reliable isolation and protection for the welding parts of the battery's tabs and terminals.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A protective component is used for isolation and protection between a battery cover and an electrode assembly. The protective component includes a main body conforming to the shape of the battery cover and a protective portion disposed on a side portion in the width direction of the main body. The main body has an electrode post through hole for the electrode post on the battery cover to pass through. The protective portion is disposed corresponding to the electrode post through hole and is connected to the main body by a bendable connecting portion. The protective part is provided with a heat-fusion connection part, and the main body is correspondingly provided with a heat-fusion part; when the main body is attached to the inner side of the battery cover, as the connection part bends, the heat-fusion connection part can be heat-fused and fixed to the heat-fusion part, so that the protective part covers the welding part between the electrode tab and the electrode post from the electrode group.

[0007] Furthermore, the pole through holes are two arranged at intervals along the length of the main body, and the two corresponding protective parts are arranged at intervals on the same side of the main body.

[0008] Furthermore, the protective component is integrally injection molded from plastic material; both the main body and the protective part are constructed as sheets.

[0009] Furthermore, the protective portion includes a central region directly opposite the electrode through hole, and an outer region surrounding the central region; the hot-melt connection portion is disposed in the outer region.

[0010] Furthermore, the outer region is provided with two heat-fusion connection portions at intervals; both heat-fusion connection portions are located at the end of the protective portion away from the connection portion, and a channel is formed between the two heat-fusion connection portions for the electrode tab to pass through to the central region.

[0011] Furthermore, a protrusion is formed around the electrode through hole on the side of the main body facing the protective part; when the hot-melt connection part is fixed to the hot-melt part, the electrode tab passing between the main body and the protective part is clamped between the protrusion and the extended region.

[0012] Furthermore, a slag-receiving groove is formed in the central region, and the slag-receiving groove is provided corresponding to the welding parts of the pole post and the pole lug.

[0013] Furthermore, the side wall of the slag receiving trough is provided with holes, and there is a gap between the holes and the bottom of the slag receiving trough.

[0014] Furthermore, the protective part is provided with a boss, the hot-melt connection part includes a hot-melt hole provided on the boss, and the hot-melt part includes a hot-melt column provided on the main body; the hot-melt column is inserted and hot-melt fixedly connected to the hot-melt hole.

[0015] Compared with the prior art, this utility model has the following advantages: (1) The protective component of this utility model is mainly composed of a main body and a protective part that can be bent and folded together. When using the protective component, the main body can be attached to the inside of the battery cover first, and then the tabs leading out from the electrode group can be welded to the corresponding poles. Then the connecting part is bent to fasten the protective part to the main body. In this way, the main body can form a reliable insulation between the battery cover and the tabs, and the protective part covers the welding part between the poles and the tabs, ensuring the isolation and protection effect between the welding part and the electrode group, and preventing welding slag from falling into the electrode group or the welding protrusion from piercing the electrode group. The main body and the protective part are connected by heat fusion, which ensures the reliability of the fastening connection of the protective part on the main body, thereby forming a stable and reliable isolation and protection for the welding part of the battery tabs and poles.

[0016] (2) Two pole holes are provided at intervals on the main body, which is compatible with the case where the battery cover of most batteries has two poles, positive and negative; the two protective parts are set on the same side of the main body, which not only makes the shape of the protective parts in the unfolded state more regular, but also facilitates the standardized stacking and storage of multiple protective parts, and facilitates the integral processing and molding of the protective parts.

[0017] (3) The protective parts are made of plastic injection molding, which not only has good insulation and isolation performance, but also has mature and reliable processing technology. The main body and the protective part are both designed as sheets, which not only ensures the isolation performance of the protective parts, but also has the advantages of saving raw materials and reducing the space occupied by the protective parts inside the battery.

[0018] (4) The protective part is divided into two parts: the central area and the outer extension area. When the central area is directly opposite the pole hole, the outer extension area can extend to the outer edge of the pole hole, thereby more reliably covering the welding part of the pole and the tab. Furthermore, the hot melt connection part is set in the outer extension area, which can avoid interference between the hot melt connection part and the pole, the tab, etc., and provides good space conditions for the tab to be inserted between the main body and the protective part.

[0019] (5) Two hot-melt connection parts are set at intervals, and both hot-melt connection parts are set on the side of the protective part away from the connection part. After the hot-melt connection parts are fixed to the hot-melt part, the two hot-melt connection points cooperate with the connection part to form a triangular distribution of three-point connection form, which can greatly improve the connection reliability between the protective part and the main body, and further improve the stability and reliability of the isolation space formed between the main body and the protective part for the connection of the electrode tab and the electrode post.

[0020] (6) A ring-shaped protrusion is provided at the edge of the through hole of the pole on the main body. After the protective part is fastened to the main body, the gap between the protective part and the protrusion is just enough for the pole ear to pass through. The protrusion and the protective part can better clamp and fix the pole ear that passes through them in the vertical direction.

[0021] (7) A slag receiving groove is set in the middle area of ​​the protective part, which can form a relatively spacious space under the pole post to accommodate the welding protrusion of the pole lug and the pole post, and can also receive foreign objects such as welding slag formed by welding, preventing foreign objects from entering the pole group.

[0022] (8) Opening holes in the side wall of the slag receiving tank not only helps to reduce the weight of the protective parts, but also allows the electrolyte to enter the battery's electrode assembly through the holes in the slag receiving tank and its side wall when the electrolyte is injected into the electrode assembly through the electrode post through the hole.

[0023] (9) By setting a boss on the protective part and setting the hot melt connection part in the form of a hot melt hole on the boss, when the hot melt column on the main body is inserted into the hot melt hole, the hot melt column can be heated and hot melted to be fixed to the hot melt hole; at the same time, since the boss is clamped between the main body and the protective part, by reasonably setting the height of the boss, a suitable gap height between the main body and the protective part can be defined, thereby providing a suitable gap height size for the installation of the electrode tab.

[0024] Another objective of this invention is to provide a battery in which the protective element described in this invention is provided on the battery cover. The battery of this invention possesses the technical advantages of the aforementioned protective element. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model. The directional terms such as front / back, up / down, etc., used therein are only used to indicate relative positional relationships and do not constitute an improper limitation of this utility model. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the protective component described in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the other side of the protective component described in this embodiment of the utility model; Figure 3 This is a schematic diagram of the protective component attached to the battery cover plate according to an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure on the other side of the battery cover and protective components shown; Figure 5 This is a schematic diagram of the structure of the protective component with a slag receiving groove on the protective part according to an embodiment of the present utility model; Figure 6 for Figure 5 A magnified view of the area shown in section A; Figure 7 This is a schematic diagram of the battery structure during the welding of the tabs and terminals according to an embodiment of the present invention; Figure 8 for Figure 7 The front view of the battery shown; Figure 9 for Figure 8 A schematic diagram of the cross-sectional structure of the part shown in BB; Figure 10 This is a three-dimensional structural diagram of the battery described in this embodiment of the present invention, showing the battery cover being fastened to the battery casing; Figure 11 for Figure 10A schematic diagram of the cross-sectional structure of the part shown in CC.

[0026] Explanation of reference numerals in the attached figures: 1. Battery cover; 10. Terminal post; 11. Insulating sleeve; 2. Battery casing; 3. Electrode assembly; 30. Electrode tabs; 4. Main body; 40. Through hole for pole post; 41. Protrusion; 42. Hot melt column; 43. Explosion-proof valve mounting hole; 5. Protective section; 50. Central area; 51. Outer area; 500. Slag receiving groove; 501. Hole; 52. Boss; 520. Hot melt hole; 6. Connecting parts. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be stated that if terms indicating orientation or positional relationship, such as "up," "down," "left," "right," "front," "back," "inner," and "outer," appear, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Taking the battery described in this utility model as an example, the directional terms such as "up," "down," "left," "right," "front," and "back" used in the embodiments are defined based on the battery's vertical direction (also known as the height direction), horizontal direction (also known as the width direction), and front-back direction (also known as the length direction). Specifically, as shown in the accompanying drawings, the X direction is the length direction of the battery, and the Y direction is the width direction of the battery.

[0029] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example 1 This embodiment relates to a protective component for isolating and protecting the battery cover 1 and the electrode assembly 3, providing reliable isolation and protection for the welded joints of the battery tabs 30 and terminals 10; one exemplary structure is as follows: Figure 1 , Figure 2 and Figure 3 As shown.

[0032] Overall, the protective component includes a main body 4 conforming to the shape of the battery cover 1, and a protective portion 5 located on the side of the main body 4 in the width direction. The main body 4 has a terminal through-hole 40 through which the terminal post 10 on the battery cover 1 passes. The protective portion 5 is provided corresponding to the terminal through-hole 40 and is connected to the main body 4 via a bendable connecting portion 6. The protective portion 5 has a heat-fusion connection portion, and the main body 4 has a corresponding heat-fusion portion. When the main body 4 is fitted against the inside of the battery cover 1, the heat-fusion connection portion can be heat-fused and fixed to the heat-fusion portion as the connecting portion 6 bends, thus covering the welding area between the electrode tab 30 from the electrode assembly 3 and the terminal post 10.

[0033] It should be noted that, based on the above overall design concept, the technical solution of this utility model can adopt a variety of different specific implementation structures, forms, or configuration sequences. For example, the above-mentioned hot-melt part and hot-melt connection part can adopt various structural forms suitable for plug-in hot-melt bonding, such as columnar or plate-shaped parts; the main body 4 and the protective part 5 can be made of materials with insulating properties such as rubber or plastic. The specific arrangement sequence and assembly method of the pole post 10 and the protective component on the battery cover 1 can also be flexibly adjusted. For the parts required for the implementation of the overall solution but not involved in the above overall setup, reasonable and flexible design can be carried out by referring to mature setup methods in the field and the actual situation during implementation. The specific implementation schemes described below in this embodiment are only one of the many solutions that can be formed by the above-mentioned combinations and variations. In actual implementation, those skilled in the art can make flexible adjustments and improvements based on the actual situation. Obviously, the many solutions that can be formed by the above-mentioned combinations and variations, as well as the specific implementation schemes of this embodiment, are all within the protection scope of this utility model.

[0034] The number of terminals 10 on the battery cover 1 is typically two, positive and two negative, although there are also cases where multiple positive and negative terminals 10 are provided. The terminal through holes 40 on the main body 4 should be configured to correspond to the arrangement of the terminals 10 on the battery cover 1. To accommodate the typical configuration of the terminals 10 on the battery cover 1, in this embodiment, as... Figure 2 As shown, there are two terminal through holes 40 arranged at intervals along the length of the main body 4. Therefore, there are also two protective parts 5 corresponding to the terminal through holes 40. Preferably, the two protective parts 5 are arranged at intervals on the same side of the main body 4. The arrangement of two terminal through holes 40 at intervals on the main body 4 is compatible with the case where the battery cover plate 1 of most batteries has two positive and negative terminals 10. Arranging the two protective parts 5 on the same side of the main body 4 not only makes the shape of the protective parts in the unfolded state more regular, which is convenient for the standardized stacking and storage of multiple protective parts, but also facilitates the integral processing and molding of the protective parts.

[0035] Typically, an explosion-proof valve is installed in the middle of the battery cover 1, between the two terminals 10; therefore, an explosion-proof valve mounting hole 43 can be correspondingly opened on the main body 4 of this embodiment; as shown Figure 4 As shown, an explosion-proof valve mounting hole 43 is provided in the middle of the main body 4 at the position corresponding to the position on the battery cover plate 1 where the explosion-proof valve is installed. The explosion-proof valve is installed in the explosion-proof valve mounting hole 43. When an abnormality occurs inside the battery and causes the explosion-proof valve to open, the high-pressure gas inside the electrode group 3 can be discharged to the outside of the battery through the explosion-proof valve mounting hole 43 and the explosion-proof valve.

[0036] As mentioned above, the main body 4 and the protective part 5 can be made of various materials such as rubber and plastic; for example, polypropylene can be used. In this embodiment, the protective part is preferably made of plastic material through integral injection molding; and both the main body 4 and the protective part 5 are constructed as sheets. Using plastic integral injection molding to process the protective part not only has good insulation and isolation performance, but also has the advantages of mature and reliable processing technology; designing both the main body 4 and the protective part 5 as sheets not only ensures the isolation performance of the protective part, but also has the advantages of saving raw materials and reducing the space occupied by the protective part inside the battery.

[0037] like Figure 3 , Figure 4 As shown, the protective portion 5 in this embodiment includes a central region 50 directly opposite the electrode through-hole 40, and an outer extension region 51 surrounding the central region 50; furthermore, a heat-fusion connection portion is provided in the outer extension region 51. By dividing the protective portion 5 into the central region 50 and the outer extension region 51, when the central region 50 is directly opposite the electrode through-hole 40, the outer extension region 51 can extend outwards to the outer edge of the electrode through-hole 40, thereby more reliably covering the welding area between the electrode 10 and the electrode tab 30; furthermore, by providing the heat-fusion connection portion in the outer extension region 51, interference between the heat-fusion connection portion and the electrode 10, electrode tab 30, etc., can be avoided, providing good space conditions for the electrode tab 30 to pass through between the main body 4 and the protective portion 5.

[0038] Based on the above configuration, two heat-fused connection parts are spaced apart in the outer region 51 of each protective part 5; both heat-fused connection parts are located at the end of the protective part 5 away from the connecting part 6, forming a channel between the two heat-fused connection parts for the electrode tab 30 to pass through to the central region 50. The spaced arrangement of two heat-fused connection parts, with both located on the side of the protective part 5 away from the connecting part 6, and the two heat-fused connection points, together with the connecting part 6, form a triangular three-point connection, which greatly improves the connection reliability between the protective part 5 and the main body 4, further enhancing the stability and reliability of the isolation space formed between the main body 4 and the protective part 5 for the connection of the electrode tab 30 and the pole post 10. Simultaneously, the channel formed between the two heat-fused connection points allows the electrode tab 30 to pass through, and the two heat-fused connection points, along the length of the main body 4, can limit the passage of the electrode tab 30.

[0039] There are, of course, several options for the specific design of the connecting part 6. For example, the connecting part 6 can be designed as a plate with a thinned center, using a thinning groove in the center to make it easy to bend. Alternatively, the connecting part 6 can be designed as a very thin plate structure, utilizing the deformation properties of the material itself to achieve bending. Or, an elongated hole can be made in the center of the plate-shaped connecting part 6, located at the bending point. Utilizing the weakened structural strength at the location of the elongated hole, the connecting part 6 can also be made easy to bend.

[0040] Of course, the main body 4 can be designed as a neat planar shape; however, in this embodiment, it is still as follows. Figure 4 As shown, a protrusion 41 is formed around the electrode through hole 40 on the side of the main body 4 facing the protective part 5. When the hot-melt connection is fixed to the hot-melt part, the electrode lug 30, which passes between the main body 4 and the protective part 5, is held between the protrusion 41 and the outer extension region 51.

[0041] A ring of protrusions 41 are provided at the edge of the electrode through hole 40 on the main body 4. After the protective part 5 is fastened to the main body 4, the gap between the protective part 5 and the protrusions 41 is just wide enough for the electrode tab 30 to pass through. The protrusions 41 and the protective part 5 can better clamp and fix the electrode tab 30 passing through them in the vertical direction. Furthermore, based on the setting of the protrusions 41, the thickness of the edge of the electrode through hole 40 is increased, and a slot can be provided on the side of the main body 4 facing the battery cover 1, so that the corresponding locking protrusions on the battery cover 1 can engage and cooperate, allowing the main body 4 to fit and be fixed more reliably on the battery cover 1.

[0042] The protective section 5 can also be designed as a neat, flat surface, such as... Figure 4 As shown. Or, as... Figure 5As shown, a recessed slag-receiving groove 500 can be formed in the central region 50 of the protective part 5. This slag-receiving groove 500 is provided corresponding to the welding position of the pole post 10 and the electrode lug 30. Providing the slag-receiving groove 500 in the central region 50 of the protective part 5 can create a relatively spacious area below the pole post 10 to accommodate the welding protrusions of the electrode lug 30 and the pole post 10. At the same time, it can also receive foreign objects such as welding slag formed during welding, preventing foreign objects from entering the electrode assembly 3.

[0043] like Figure 6 As shown, in the case of a slag receiving groove 500, the slag receiving groove 500 in this embodiment has a hole 501 on its side wall, and there is a gap between the hole 501 and the bottom of the slag receiving groove 500. The hole 501 on the side wall of the slag receiving groove 500 not only helps to reduce the weight of the protective component, but also allows the electrolyte to enter the electrode assembly 3 of the battery through the hole 501 on its side wall when electrolyte is injected into the electrode assembly 3 through the electrode post through-hole 40. Furthermore, the gap between the hole 501 and the bottom of the slag receiving groove 500 reduces the risk of welding slag, foreign objects, etc., in the slag receiving groove 500 falling into the electrode assembly 3 through the hole 501. In practical implementation, multiple holes 501 can be evenly distributed along the edge of the slag receiving groove 500. A connecting rib will be formed between two adjacent holes 501. With the help of the elastic deformation performance of the connecting rib, when the bottom of the slag receiving groove 500 abuts against the electrode group 3, the slag receiving groove 500 forms a good elastic support between the electrode group 3 and the protective part 5.

[0044] Continue to refer to Figure 6 As shown, the gap H between the bottom of the hole 501 and the slag receiving groove 500, i.e., the effective depth of the slag receiving groove 500, can be flexibly set within a reasonable range. Preferably, the total depth of the slag receiving groove 500 can be set between 1.5mm and 8.5mm, such as 1.5mm, 4mm, 6mm, 8.5mm, etc. The depth of the slag receiving groove 500 is limited here so that the slag receiving groove 500 can better accommodate the protrusions or welding slag at the welding parts of the electrode tab 30 and the electrode post 10, thereby better reducing the risk of welding slag puncturing the diaphragm. In a further preferred embodiment, the effective depth of the slag receiving groove 500 can be set between 0.3mm and 8mm, such as 0.3mm, 4mm, 6mm, 8mm, etc.

[0045] For the specific design of the heat-fusion section and the heat-fusion connection section, there are naturally many different structural options available; for example, the heat-fusion section can be designed as an insert plate, and the heat-fusion connection section can be designed as an insert joint. In this embodiment, as... Figure 5 , Figure 6As shown, the protective part 5 is provided with a boss 52, and the hot-melt connection part includes a hot-melt hole 520 provided on the boss 52. The hot-melt part includes a hot-melt post 42 provided on the main body 4. After the welding between the electrode tab 30 and the electrode post 10 is completed, the protective part 5 is fastened to the main body 4, and then the hot-melt post 42 is inserted and hot-melted to be fixed to the hot-melt hole 520, so that the protective part 5 can be firmly fixed to the main body 4.

[0046] By providing a boss 52 on the protective part 5 and setting the hot-melt connection part in the form of a hot-melt hole 520 located on the boss 52, when the hot-melt column 42 on the main body 4 is inserted into the hot-melt hole 520, the hot-melt column 42 can be heated and hot-melted to be fixed to the hot-melt hole 520; at the same time, since the boss 52 is clamped between the main body 4 and the protective part 5, by reasonably setting the height of the boss 52, a suitable gap height between the main body 4 and the protective part 5 can be defined, thereby providing a suitable gap height dimension for the insertion of the tab 30.

[0047] In summary, the protective component of this embodiment is mainly composed of a main body 4 and a protective part 5 that can be bent and folded together. When using the protective component, the main body 4 can be first attached to the inside of the battery cover plate 1, and then the tabs 30 leading out from the electrode group 3 can be welded to the corresponding terminals 10. Then, the connecting part 6 is bent to fasten the protective part 5 to the main body 4. In this way, the main body 4 can form a reliable insulating barrier between the battery cover plate 1 and the tabs 30, and the protective part 5 covers the welding area between the terminals 10 and the tabs 30, ensuring the isolation and protection effect between the welding area and the electrode group 3, and preventing welding slag from falling into the electrode group 3 or welding protrusions from piercing the electrode group 3. The main body 4 and the protective part 5 are connected by heat fusion, ensuring the reliability of the fastening connection of the protective part 5 on the main body 4, thereby forming a stable and reliable isolation and protection for the welding area between the battery tabs 30 and the terminals 10.

[0048] Example 2 This embodiment relates to a battery, the battery cover 1 of which is provided with the protective component provided in Embodiment 1; an exemplary structure of the battery is as follows: Figures 7 to 11 As shown.

[0049] When using the protective component of this utility model in a battery, the protective component must first be installed on the battery cover plate 1 pre-installed with the terminal post 10; an insulating sleeve 11 is fitted on the terminal post 10 to achieve insulation isolation between the terminal post 10 and the battery cover plate 1.

[0050] After that, as Figure 7 As shown, the battery cover 1 with protective components is placed on the open side of the battery casing 2, and the tabs 30 leading out from the electrode assembly 3 inside the battery casing 2 are arranged and attached to the bottom of the terminal post 10 for welding. At this time, as shown... Figure 7 , Figure 8 and Figure 9 As shown, the connecting part 6 is not bent, and the protective part 5 is in the unfolded state, providing ample space for the welding operation of the electrode tab 30 and the electrode post 10.

[0051] Without the protective component of this invention, the multiple tabs 30, due to their varying shapes and lengths and their dispersed location, are easily inserted upside down into the electrode assembly 3, causing a short circuit within the electrode assembly 3 and affecting the product's safety and performance. With the protective component of this invention, each tab 30 corresponding to each electrode post 10 can be neatly arranged between the two hot-melt posts 42 and attached to the bottom of the electrode post 10 to complete the welding operation.

[0052] like Figure 10 and Figure 11 As shown, after welding is completed, the connecting part 6 is bent to fasten the protective part 5 onto the main body 4, forming an isolation space between the protective part 5 and the main body 4 to accommodate the welded part. Since the hot melt column 42 is hot melt fixed to the corresponding hot melt hole 520, the connection strength is reliable, thus the protective part 5 is firmly fastened to the main body 4. With the help of the channel formed between the two hot melt fixed points, and the clamping and restraining effect of the protrusion 41 and the protective part 5, a good standard restraint effect is formed on the electrode tab 30 inserted therein. At this time, the protective part 5 clamps and fixes the electrode tab 30 to the main body 4 in the form of pressure lifting, and the electrode tab 30 will no longer bend or deform, or even be inserted upside down into the electrode group 3.

[0053] In summary, by adopting the protective component of this utility model, the shape of the tab 30 is well standardized and maintained before and after the electrode assembly 3 is assembled, which plays a role in fixing and shaping the tab 30. A stable and reliable isolation and protection is formed between the welding part of the electrode assembly 3 and the bottom of the terminal post 10. The tab 30 will not be inserted backward into the electrode assembly 3, and there will be no situation where welding slag punctures or falls into the electrode assembly 3, which reduces the probability of battery short circuit and improves battery safety performance.

[0054] The above description is merely a preferred embodiment of this utility model. Detailed explanations of configurations, examples of specific structural arrangements, and descriptions of assembly and connection methods are provided to ensure sufficient disclosure so that those skilled in the art can better implement this utility model, and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A protective component for isolating and protecting the battery cover and the electrode assembly, characterized in that: The protective component includes a main body conforming to the shape of the battery cover, and a protective portion provided on the side of the main body in the width direction; The main body is provided with a terminal through hole for the terminal on the battery cover to pass through, and the protective part is provided corresponding to the terminal through hole and is connected to the main body by a bendable connecting part; The protective part is provided with a heat-fusion connection part, and the main body is correspondingly provided with a heat-fusion part; when the main body is attached to the inner side of the battery cover, as the connection part bends, the heat-fusion connection part can be heat-fused and fixed to the heat-fusion part, so that the protective part covers the welding part between the electrode tab and the electrode post from the electrode group.

2. The protective component according to claim 1, characterized in that: The pole post through holes are two arranged at intervals along the length of the main body, and the two corresponding protective parts are arranged at intervals on the same side of the main body.

3. The protective component according to claim 1, characterized in that: The protective component is integrally injection molded from plastic material; both the main body and the protective part are constructed as sheets.

4. The protective component according to claim 1, characterized in that: The protective portion includes a central region directly opposite the through hole of the pole post, and an outer region surrounding the central region; the hot-melt connection portion is disposed in the outer region.

5. The protective component according to claim 4, characterized in that: The outer region is provided with two hot-melt connection parts at intervals; both hot-melt connection parts are located at the end of the protective part away from the connection part, and a channel is formed between the two hot-melt connection parts for the electrode tab to pass through to the middle region.

6. The protective component according to claim 4, characterized in that: A protrusion is formed around the through hole of the pole post on the side of the main body facing the protective part; When the hot-melt connection is fixed to the hot-melt part, the tab that passes between the body and the protective part is held between the protrusion and the extension region.

7. The protective component according to claim 1, characterized in that: A slag-receiving groove is formed in the central area, and the slag-receiving groove is set at the welding position of the pole post and the pole lug.

8. The protective component according to claim 7, characterized in that: The slag receiving trough has holes on its side wall, and there is a gap between the holes and the bottom of the slag receiving trough.

9. The protective component according to any one of claims 1 to 8, characterized in that: The protective part is provided with a boss, the hot-melt connection part includes a hot-melt hole provided on the boss, and the hot-melt part includes a hot-melt column provided on the main body; the hot-melt column is inserted and hot-melt fixed in the hot-melt hole.

10. A battery, characterized in that: The battery cover plate of the battery is provided with a protective element as described in any one of claims 1 to 9.

Images