Battery shell assembly and battery
By arranging the first and second plastic parts on the inner and outer walls of the battery shell, the tabs are exposed to the outside through the through holes of the two, which solves the problem of insufficient utilization of the internal space of the shell and achieves efficient space utilization and insulation protection.
Patent Information
- Application Number
- CN202422653307.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the prior art, the poles, tabs and connecting pieces of the battery are all arranged inside the shell, resulting in insufficient utilization of the space inside the shell.
A combined structure of a shell body, a first plastic part and a second plastic part is adopted. The first plastic part covers the outer wall of the shell, and the second plastic part covers the inner wall of the shell. The tabs are exposed to the outside world through the through holes of the two plastic parts, and the two plastic parts are injection-molded and fixed on both sides of the shell. The second plastic part is a flat structure to reduce the internal space occupied, and the fixing stability is improved through injection holes and convex bulges.
The utilization rate of the internal space of the shell is improved, the insulation and protection effects are enhanced, while the installation position accuracy and stability are maintained, and the thickness of the shell is avoided to be increased.
Smart Images
Figure CN223462312U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery shell assembly and battery. BACKGROUND
[0002] Battery is a kind of device that can convert chemical energy into electric energy, it can be used as main energy storage component, and has positive and negative division.Using battery as energy source, stable voltage or current can be obtained, it is less affected by external environment, can long-time stable power supply, and battery is convenient to carry, is convenient to install or replace on electric equipment.
[0003] At present, battery is generally protected inside by shell and cover plate, and upper plastic and lower plastic are arranged on the two sides of cover plate to insulate and protect the positive and negative poles of battery.But in the prior art, the pole, tab and connecting piece of battery are all arranged in the shell, and the lower plastic, pole, tab and connecting piece are bulky as a whole, which is not conducive to the utilization of the space inside the shell. UTILITY MODEL CONTENT
[0004] The utility model discloses a battery shell assembly and battery, to solve the problem that the pole, tab and connecting piece of battery in the prior art are all arranged in the shell, and the lower plastic, pole, tab and connecting piece are bulky as a whole, which is not conducive to the utilization of the space inside the shell.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme:
[0006] On the one hand, the utility model provides a kind of battery shell assembly, for installing electric core, the battery shell assembly includes:
[0007] Shell body, the shell body has installation shell wall, the installation shell wall is opened with the tab through-hole that communicates the inside and outside of the shell body;The electric core is located in the shell body;
[0008] First plastic piece, the first plastic piece covers on the outer wall of the installation shell wall;
[0009] Second plastic piece, the second plastic piece covers on the inner wall of the installation shell wall;The first plastic piece and the second plastic piece can be injection molded and fixed on the inside and outside of the installation shell wall;Second plastic piece is flat plate structure, and the tab of the electric core can pass through the first plastic piece, the second plastic piece and the tab through-hole to outside.
[0010] As an optional solution of the above battery shell assembly, a first convex is arranged on the first plastic part, a first injection molding hole is arranged on the outer wall of the mounting shell wall, and the first convex is injection molded and embedded in the first injection molding hole; a second convex is arranged on the second plastic part, a second injection molding hole is arranged on the inner wall of the mounting shell wall, and the second convex is injection molded and embedded in the second injection molding hole.
[0011] As an optional solution of the above battery shell assembly, the first injection molding hole and the second injection molding hole are both blind holes.
[0012] As an optional solution of the above battery shell assembly, the first plastic part is in a split structure or an integral structure; and the second plastic part is in a split structure or an integral structure.
[0013] As an optional solution of the above battery shell assembly, the tab through hole includes a positive electrode through hole, and at least one positive electrode through hole is arranged; or
[0014] the tab through hole includes a negative electrode through hole, and at least one negative electrode through hole is arranged; or
[0015] the tab through hole includes the positive electrode through hole and the negative electrode through hole, and at least one positive electrode through hole and at least one negative electrode through hole are arranged.
[0016] As an optional solution of the above battery shell assembly, the battery shell assembly further comprises an explosion-proof valve, the mounting shell wall is provided with an explosion-proof hole communicating between the inside and the outside of the shell body, and the explosion-proof valve is arranged on the outer wall of the mounting shell wall and covers the explosion-proof hole.
[0017] As an optional solution of the above battery shell assembly, the explosion-proof valve is provided with a notch on one side of the mounting shell wall, or the explosion-proof valve is provided with a notch on the side away from the mounting shell wall.
[0018] As an optional solution of the above battery shell assembly, the first plastic part has a flange, and the width of the flange ranges from 0 to 10 mm.
[0019] As an optional solution of the above battery shell assembly, the wall thickness of the mounting shell wall is H, when the flange of the first plastic part protrudes outward from the mounting shell wall, the distance between the upper surface of the flange and the upper surface of the mounting shell wall ranges from 0 to H; and when the flange of the first plastic part is recessed in the mounting shell wall, the distance between the upper surface of the flange and the upper surface of the mounting shell wall ranges from 0 to 0.5H.
[0020] In another aspect, the utility model provides a kind of battery, including the battery shell assembly as above, and the battery further includes the electric core, and the electric core is located in the shell body.
[0021] The utility model discloses the beneficial effect that:
[0022] The battery shell assembly includes a shell body, a first plastic part, and a second plastic part. The shell body has a mounting shell wall with a tab through hole that communicates between the inside and outside of the shell body. The electric core is disposed inside the shell body. The first plastic part covers the outer wall of the mounting shell wall, and the second plastic part covers the inner wall of the mounting shell wall. The first plastic part and the second plastic part can insulate and protect the two sides of the mounting shell wall and the tab through hole. The second plastic part is a flat plate structure, and the tab of the electric core can pass through the first plastic part, the second plastic part, and the tab through hole to the outside. Therefore, the shell body only has the flat plate type second plastic part with a small thickness inside, and the related devices connected to the tab of the electric core are located outside the shell body. Therefore, the shell body occupies less internal space, and the space utilization rate inside the shell body can be improved. The first plastic part and the second plastic part can be injection molded and fixed on the inside and outside of the mounting shell wall. In this way, the first plastic part and the second plastic part are installed and fixed on the shell body. The first plastic part is integrally formed with the upper wall of the mounting shell wall, and the second plastic part is integrally formed with the lower wall of the mounting shell wall. Therefore, the split injection molding method has high position accuracy, and the installation and fixing method does not increase the thickness of the lower injection molding part, which is beneficial to the utilization of the internal space of the shell body. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 The structure diagram of the battery shell assembly provided by the utility model embodiment is shown.
[0024] Figure 2 The partial exploded view of the battery shell assembly provided by the utility model embodiment is shown.
[0025] Figure 3 The partial cross-sectional view of the battery shell assembly provided by the utility model embodiment is shown.
[0026] Figure 4 The structure diagram of the first plastic part and the second plastic part in another perspective view provided by the utility model embodiment is shown.
[0027] In the figure:
[0028] 1, shell body; 11, mounting shell wall; 111, tab through hole; 112, explosion-proof hole; 113, liquid injection port; 114, mounting groove; 115, first injection hole; 2, first plastic part; 21, first convex bundle; 22, flange edge; 3, second plastic part; 31, second convex bundle; 4, explosion-proof valve. DETAILED DESCRIPTION
[0029] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature on the second feature include the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0032] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0033] As Figures 1-4 shown, the present embodiment provides a battery shell assembly for mounting a battery cell.
[0034] The battery shell assembly comprises a shell body 1, a first plastic part 2 and a second plastic part 3. The shell body 1 has a mounting shell wall 11 provided with a tab through hole 111 for communication between the inside and outside of the shell body 1, and an electric core is arranged in the shell body 1. The first plastic part 2 is arranged on the outer wall of the mounting shell wall 11, and the second plastic part 3 is arranged on the inner wall of the mounting shell wall 11, so that the first plastic part 2 and the second plastic part 3 can insulate and protect the two sides of the mounting shell wall 11 and the tab through hole 111. Optionally, the outer wall of the mounting shell wall 11 is provided with a mounting groove 114, the tab through hole 111 is communicated with the mounting groove 114, and the first plastic part 2 is embedded in the mounting groove 114, so as to reasonably utilize the space position.
[0035] The second plastic part 3 is a flat plate structure, and the tab of the electric core can pass through the first plastic part 2, the second plastic part 3 and the tab through hole 111 to the outside, so that the shell body 1 has only the second plastic part 3 with small thickness inside, and the related devices connected with the tab of the electric core are located outside the shell body 1, thus occupying less space inside the shell body 1, and the space utilization rate in the shell body 1 can be improved. The first plastic part 2 and the second plastic part 3 can be injection molded and fixed on the inner and outer sides of the mounting shell wall 11, so as to realize the mounting and fixing of the first plastic part 2 and the second plastic part 3 on the shell body 1. The first plastic part 2 is integrally formed with the upper wall of the mounting shell wall 11, and the second plastic part 3 is integrally formed with the lower wall of the mounting shell wall 11, so that the split injection molding position has high precision, and the mounting and fixing mode does not increase the thickness of the lower injection molding part, which is beneficial to the utilization of the space inside the shell body 1.
[0036] As shown in Figure 2 and Figure 4 , the first plastic part 2 is provided with a first convex block 21, the outer wall of the mounting shell wall 11 is provided with a first injection molding hole 115, the first convex block 21 is injection molded and embedded in the first injection molding hole 115, the second plastic part 3 is provided with a second convex block 31, the inner wall of the mounting shell wall 11 is provided with a second injection molding hole, and the second convex block 31 is injection molded and embedded in the second injection molding hole. Through the injection molding and embedding of the first convex block 21 in the first injection molding hole 115, the stability of the integral molding of the first plastic part 2 and the outer wall of the mounting shell wall 11 can be improved. Through the injection molding and embedding of the second convex block 31 in the second injection molding hole, the stability of the integral molding of the second plastic part 3 and the inner wall of the mounting shell wall 11 can be improved, and the position precision of the first plastic part 2 and the second plastic part 3 relative to the mounting shell wall 11 is high. Optionally, the first injection molding hole 115 and the second injection molding hole are both blind holes, so that the injection molding of the first plastic part 2 and the outer wall of the mounting shell wall 11 does not affect the injection molding of the second plastic part 3 and the inner wall of the mounting shell wall 11.
[0037] Further, the first plastic part 2 is a split structure or an integral structure, and the second plastic part 3 is a split structure or an integral structure. When the first plastic part 2 is a split structure and the second plastic part 3 is also a split structure, the split structure can facilitate the disassembly and recombination of the first plastic part 2 and the second plastic part 3, so as to adjust the position according to the actual demand and reasonably utilize the space. When the first plastic part 2 is an integral structure and the second plastic part 3 is also an integral structure, the integral structure makes the first plastic part 2 and the second plastic part 3 more integrated and coordinated in design, and fully insulates and protects the installation shell wall 11.
[0038] Further, the tab through hole 111 includes a positive electrode through hole, and at least one positive electrode through hole is provided, so that the installation shell wall 11 can pass through the tab of the positive electrode of the battery cell according to the demand; or the tab through hole 111 includes a negative electrode through hole, and at least one negative electrode through hole is provided, so that the installation shell wall 11 can pass through the tab of the negative electrode of the battery cell according to the demand; or the tab through hole 111 includes a positive electrode through hole and a negative electrode through hole, and at least one positive electrode through hole and at least one negative electrode through hole are provided, so that the installation shell wall 11 can pass through the tabs of the positive electrode and the negative electrode of the battery cell according to the demand, so as to meet the actual arrangement demand.
[0039] As shown in Figure 1 and Figure 2 , the installation shell wall 11 is also provided with a liquid injection port 113. The liquid injection port 113 is communicated between the inside and the outside of the shell body 1 through the second plastic part 3. Through the arrangement of the liquid injection port 113, the electrolyte can be conveniently injected into the battery cell. Optionally, the liquid injection port 113 can be arranged on one side close to the positive electrode through hole, or on one side close to the negative electrode through hole, or between the positive electrode through hole and the negative electrode through hole.
[0040] Further, the hot melt type battery shell assembly further comprises an explosion-proof valve 4. The installation shell wall 11 is provided with an explosion-proof hole 112 communicated between the inside and the outside of the shell body 1. The explosion-proof valve 4 is arranged on the outer wall of the installation shell wall 11 and covers the explosion-proof hole 112. When the internal pressure of the shell body 1 abnormally rises, the explosion-proof valve 4 can automatically open to release the internal pressure, so as to prevent explosion caused by the abnormal rise of the internal pressure of the shell body 1. Optionally, the side of the explosion-proof valve 4 facing the installation shell wall 11 is provided with a notch, or the side of the explosion-proof valve 4 away from the installation shell wall 11 is provided with a notch. Through the arrangement of the notch, the explosion-proof valve 4 can uniformly bear the pressure and crack along the notch, thereby improving the safety of the battery.
[0041] As shown in Figure 2 and Figure 3As shown, the first plastic part 2 has a flange 22, the width of the flange 22 ranges from 0 to 10 mm, by setting the flange 22, the installation of the first plastic part 2 on the installation shell wall 11 can be facilitated, the structural strength of the first plastic part 2 is improved, the stability and reliability of the first plastic part 2 are ensured, and the width of the flange 22 ranges from 0 to 10 mm, the size of the first plastic part 2 as a whole can be controlled, the weight of the first plastic part 2 is controlled, the material and cost are reduced, and meanwhile, the influence on the design of the shell body 1 is avoided. Wherein, the wall thickness of the installation shell wall 11 is H, when the flange 22 of the first plastic part 2 is protruded outside the installation shell wall 11, the distance between the upper surface of the flange 22 and the upper surface of the installation shell wall 11 ranges from 0 to H, in this way, the height of the first plastic part 2 is controlled, and the first plastic part 2 is prevented from being too high to be not conducive to the improvement of the battery volume utilization rate; when the flange 22 of the first plastic part 2 is recessed inside the installation shell wall 11, the distance between the upper surface of the flange 22 and the upper surface of the installation shell wall 11 ranges from 0 to 0.5H, in this way, the height of the first plastic part 2 is controlled, and the position wall thickness of the installation shell body for installing the first plastic part 2 is prevented from being too thin to affect the strength of the shell body 1.
[0042] The embodiment also provides a battery comprising the battery shell assembly as described above, and the battery further comprises an electric core arranged in the shell body 1, by using the battery shell assembly as described above, only the second plastic part 3 with small thickness in the form of a flat plate is arranged inside the shell body 1, and the related devices connected with the tab of the electric core are all arranged outside the shell body 1, in this way, the space utilization rate inside the shell body 1 is improved, and the first plastic part 2 and the second plastic part 3 can be injection molded and fixed on the inner and outer sides of the installation shell wall 11, in this way, the installation and fixation of the first plastic part 2 and the second plastic part 3 on the shell body 1 are realized, the first plastic part 2 is integrally formed with the upper side of the installation shell wall 11, and the second plastic part 3 is integrally formed with the lower side of the installation shell wall 11, therefore, the position precision of the injection molding is high, and the installation and fixation manner does not increase the thickness of the lower injection molding part, and is beneficial to the utilization of the space inside the shell body 1.
[0043] Obviously, the above embodiment of the utility model is only for clear illustration of the utility model, and is not a limitation on the embodiment of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A battery housing assembly for mounting a battery cell, characterized in that: The battery shell assembly comprises: a shell body (1) having a mounting shell wall (11) provided with a tab through hole (111) for communication between the inside and outside of the shell body (1); and a first plastic part (2) covering the outer wall of the mounting shell wall (11); a second plastic part (3) covering the inner wall of the mounting shell wall (11); the first plastic part (2) and the second plastic part (3) can be injection molded and fixed to the inside and outside of the mounting shell wall (11); the second plastic part (3) is a flat plate structure, and the tab of the battery cell can pass through the first plastic part (2), the second plastic part (3) and the tab through hole (111) to the outside.
2. The battery case assembly of claim 1, wherein, The first plastic part (2) is provided with a first convex (21), and the outer wall of the mounting shell wall (11) is provided with a first injection hole (115), and the first convex (21) is injection molded and embedded in the first injection hole (115); the second plastic part (3) is provided with a second convex (31), and the inner wall of the mounting shell wall (11) is provided with a second injection hole, and the second convex (31) is injection molded and embedded in the second injection hole.
3. The battery case assembly of claim 2, wherein, The first injection hole (115) and the second injection hole are both blind holes.
4. The battery case assembly of claim 1, wherein, The first plastic part (2) is a split structure or an integral structure; the second plastic part (3) is a split structure or an integral structure.
5. The battery case assembly of claim 1, wherein, The tab through hole (111) includes a positive pole through hole, and at least one positive pole through hole is provided; or The tab through hole (111) includes a negative pole through hole, and at least one negative pole through hole is provided; or The tab through hole (111) includes the positive pole through hole and the negative pole through hole, and at least one of the positive pole through hole and the negative pole through hole is provided.
6. The battery case assembly of claim 1, wherein, The battery shell assembly further comprises an explosion-proof valve (4), and the mounting shell wall (11) is provided with an explosion-proof hole (112) for communication between the inside and outside of the shell body (1), and the explosion-proof valve (4) is arranged on the outer wall of the mounting shell wall (11) and covers the explosion-proof hole (112).
7. The battery case assembly of claim 6, wherein, The explosion-proof valve (4) is provided with a notch on one side facing the mounting shell wall (11), or the explosion-proof valve (4) is provided with a notch on one side away from the mounting shell wall (11).
8. The battery case assembly of claim 1, wherein, The first plastic part (2) has a flange edge (22), and the width of the flange edge (22) ranges from 0 to 10 mm.
9. The battery case assembly of claim 8, wherein, The wall thickness of the mounting shell wall (11) is H, when the flange edge (22) of the first plastic part (2) is convex on the outside of the mounting shell wall (11), the distance between the upper surface of the flange edge (22) and the upper surface of the mounting shell wall (11) ranges from 0 to H; when the flange edge (22) of the first plastic part (2) is concave in the mounting shell wall (11), the distance between the upper surface of the flange edge (22) and the upper surface of the mounting shell wall (11) ranges from 0 to 0.5H.
10. A battery, characterized by The battery further comprises the electric core which is arranged in the shell body (1).