Storage battery shell assembly

Abstract

The utility model relates to a storage battery shell component, which comprises a first shell, a second shell and a threaded connecting piece for connecting the first shell and the second shell, the first shell and the second shell are plastic pieces, and a metal nut is embedded in the first shell, so that the strength of the first shell can be increased, the first shell is prevented from cracking due to overlarge locking force, and the service life of the first shell is prolonged. The second shell is provided with a metal shaft sleeve, the metal shaft sleeve comprises a sleeving part and an abutting part, the abutting part extends outwards in the radial direction of the sleeving part, the sleeving part is provided with a sleeving hole, the threaded connecting piece penetrates through the sleeving hole and is connected to the metal nut, and the head of the threaded connecting piece abuts against the abutting part so that the second shell can make indirect contact with the head of the threaded connecting piece. The situation that in the prior art, due to the fact that acting force is directly exerted on the second shell through a threaded connecting piece (screw), the second shell cracks is avoided, the first shell and the metal nut are fixedly connected in an embedded mode, and a plastic piece in a locking area of the storage battery shell is prevented from cracking.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a storage battery housing assembly. Background Art

[0002] Storage batteries are widely used, and the application scenarios are complex and changeable. Therefore, higher requirements are put forward for the storage battery housing (such as impact resistance, waterproof, flame retardant, etc.) to fully protect the storage battery in the housing. The housing of the storage battery is usually made of plastic. For the housing with a high requirement for protection safety level, in order to reach the IP67 level, a copper nut and a screw are usually used to lock and connect between the upper shell and the lower shell. The screw passes through the mounting hole of the lower shell and is connected to the copper nut of the upper shell to lock the upper and lower shells, ensuring the tight fit of the upper and lower shells. In this state, the upper and lower shells are in a state of being locked by screws for a long time. Due to the insufficient strength and toughness of the plastic itself, the plastic parts at the locking positions of the upper and lower shells are cracked. Summary of the Invention

[0003] The purpose of the utility model is to provide a storage battery housing assembly to solve the problem that the plastic parts at the locking area of the existing storage battery housing are cracked.

[0004] To achieve the above purpose, the technical solution of the utility model is: a storage battery housing assembly, including a first housing, a second housing, and a threaded connector connecting the first housing and the second housing. Both the first housing and the second housing are plastic parts. A metal nut is embedded in the first housing, and a metal bushing is provided on the second housing. The metal bushing includes a socket part and an abutting part. The abutting part extends radially outward along the socket part. The socket part is provided with a socket hole. The threaded connector passes through the socket hole and is connected to the metal nut. The head of the threaded connector abuts against the abutting part, so that the second housing forms an indirect contact with the head of the threaded connector.

[0005] In one embodiment, the contact between the abutting part and the second housing is a surface contact.

[0006] In one embodiment, the contact surface between the abutting part and the second housing is a plane.

[0007] In one embodiment, the second housing is provided with a connection hole. The end of the connection hole close to the first housing is the first end of the connection hole, and the end opposite to the first end is the second end. The end surface of the second end of the connection hole forms the contact surface.

[0008] In one embodiment, the second housing is provided with a guiding hole which is coaxial with the connecting hole and located at the second end of the connecting hole. The inner diameter of the guiding hole is larger than that of the connecting hole, and a guiding structure is provided at one end of the guiding hole close to the connecting hole.

[0009] In one embodiment, a plurality of guiding ribs are provided on the inner wall of the guiding hole. The plurality of guiding ribs are circumferentially and spacedly distributed along the connecting hole, and the plurality of guiding ribs cooperate to form the guiding structure.

[0010] In one embodiment, the socket part is inserted into the connecting hole, and the outer diameter of the socket part is smaller than the inner diameter of the connecting hole.

[0011] In one embodiment, a tapered guiding structure is provided at one end of the socket hole away from the first housing.

[0012] In one embodiment, the first housing is an upper housing, the second housing is a lower housing, the first housing is provided with a blind hole, the metal nut is fixedly arranged in the blind hole, and the opening of the blind hole faces the second housing.

[0013] In one embodiment, the threaded connecting piece is a pan head combination screw, including a screw body and a washer. The head of the screw body is the head of the threaded connecting piece, so that the head of the threaded connecting piece indirectly abuts against the abutting part through the washer.

[0014] In one embodiment, the storage battery is a lithium battery.

[0015] In one embodiment, the metal is copper.

[0016] The beneficial effects of the present utility model are as follows: by embedding a metal nut in the first housing and arranging a metal bushing in the second housing, and indirectly abutting the head of the threaded connecting piece and the second housing through the metal bushing, the present utility model avoids the cracking of the second housing caused by the threaded connecting piece (screw) directly applying the acting force on the second housing in the prior art. The first housing and the metal nut are fixedly connected by an inlaying method, so that the strength of the first housing can be increased, and the first housing is prevented from cracking due to excessive locking force, that is, the plastic parts in the locking area of the storage battery housing are prevented from cracking. Description of the Drawings

[0017] Figure 1 is a perspective view of an embodiment of the present utility model.

[0018] Figure 2 is a top view of an embodiment of the present utility model.

[0019] Figure 3 isFigure 2 A - A sectional view.

[0020] Figure 4 is Figure 3 Partial enlarged view at position B.

[0021] Figure 5 It is a structural diagram of the metal bushing of the embodiment of the present utility model.

[0022] Figure 6 It is a sectional view of the second housing of the embodiment of the present utility model.

[0023] Wherein: 1 is the first housing, 11 is the blind hole, 2 is the second housing, 21 is the connection hole, 211 is the contact surface, 22 is the guiding hole, 220 is the guiding structure, 221 is the guiding rib, 3 is the threaded connecting member, 31 is the screw body, 32 is the washer, 4 is the metal nut, 5 is the metal bushing, 51 is the sleeved portion, 510 is the sleeved hole, and 52 is the abutting portion. Specific embodiments

[0024] To further illustrate the embodiments, the present utility model provides drawings. These drawings are part of the disclosure of the present utility model, which are mainly used to illustrate the embodiments and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] Refer to Figures 1 to 6 As shown, the present utility model discloses a battery housing assembly, including a first housing 1, a second housing 2, and a threaded connecting member 3 connecting the first housing 1 and the second housing 2. Both the first housing 1 and the second housing 2 are plastic parts. The first housing 1 is embedded with a metal nut 4, the second housing 2 is provided with a metal bushing 5. The metal bushing 5 includes a sleeved portion 51 and an abutting portion 52. The abutting portion 52 extends radially outward along the sleeved portion 51. The sleeved portion 51 is provided with a sleeved hole 510. The threaded connecting member 3 passes through the sleeved hole 510 and is connected to the metal nut 4. The head of the threaded connecting member 3 abuts against the abutting portion 52, so that the second housing 2 forms an indirect contact with the head of the threaded connecting member 3.

[0026] In the present utility model, a metal nut 4 and a metal bushing 5 are respectively arranged on a first housing 1 and a second housing 2, and the first housing 1 and the second housing 2 are respectively indirectly connected to a threaded connector 3 by connecting the metal nut 4 and the metal bushing 5 to the threaded connector 3. More specifically, the threaded connector 3 is threadedly connected to the metal nut 4, and after the threaded connector 3 passes through the metal bushing 5, the head of the threaded connector 3 abuts against the metal bushing 5, so that the first housing 1 and the second housing 2 form a relatively fixed connection. The metal nut 4 is embedded in the first housing 1, so the connection strength between the two is relatively large, and the strength of the metal nut 4 itself is much greater than that of the first housing 1 made of plastic. Therefore, the metal nut 4 can bear the tensile force of the threaded connector 3 without causing the first housing 1 to bear excessive force and deform or even crack. The threaded connector 3 passes through a socket hole 510 provided in a socket portion 51 of the metal bushing 5 and abuts against an abutting portion 52 of the metal bushing 5, so that the second housing 2 and the threaded connector 3 are in indirect contact. Moreover, the abutting portion 52 extends radially outward from the socket portion 51, so the abutting portion 52 can press the second housing 2 towards the direction where the first housing 1 is located, so that the first housing 1 and the second housing 2 form a fixed connection. Through the metal bushing 5, the current situation that the head of the threaded connector 3 directly abuts against the second housing 2 in the prior art, causing cracking near the mounting hole of the second housing 2, is changed, and the role of reducing the local force on the second housing 2 is played, thereby preventing the second housing 2 from cracking near the locking position.

[0027] Among them, the metal nut 4 can be embedded in the first housing 1 by insert injection molding, that is, the metal nut 4 is placed in the cavity of the injection mold during the injection molding process of the first housing 1, and after the injection molding is completed, the metal nut 4 is fixed in the first housing 1; it can also be embedded in the first housing 1 by interference fit, that is, after the first housing 1 is injection molded, the metal nut 4 is assembled into a metal nut assembly hole reserved in the first housing 1. In this example, insert injection molding is preferably adopted.

[0028] The metal in this example is copper, that is, the metal nut 4 and the metal bushing 5 are a copper nut and a copper bushing respectively. In other embodiments, the metal can also be selected from iron, steel or other metal materials.

[0029] Refer to Figures 4 to 6 As shown, in order to ensure that the local force on the second housing 2 is fully reduced, the contact between the abutting portion 52 and the second housing 2 is surface contact. In other embodiments, the contact between the abutting portion 52 and the second housing 2 can also be multi-point contact, and the distribution between the contact points should be relatively close to ensure that the local force on the second housing 2 is small. Further, the contact surface between the abutting portion 52 and the second housing 2 in this example is a plane. In other embodiments, the contact surface can also be a curved surface or a composite surface formed by a curved surface and a plane together.

[0030] The second housing 2 is provided with a connection hole 21. The end of the connection hole 21 close to the first housing 1 is the first end of the connection hole 21, and the end opposite to the first end is the second end. The end face of the second end of the connection hole 21 forms a contact surface 211.

[0031] The second housing 2 is provided with a guiding hole 22. The guiding hole 22 is coaxial with the connection hole 21, and the guiding hole 22 is located at the second end of the connection hole 21. The inner diameter of the guiding hole 22 is larger than the inner diameter of the connection hole 21, so that the metal bushing 5 can pass through the guiding hole 22 and be inserted into the connection hole 21, and at the same time, it is convenient for the threaded connector 3 to pass through the guiding hole 22 and be inserted into the metal bushing 5. One end of the guiding hole 22 close to the connection hole 21 is provided with a guiding structure 220. The guiding structure 220 is used to guide the threaded connector 3 to be inserted into the socket hole 510, and is also used to guide the metal bushing 5 to be inserted into the connection hole 21. In this example, the second housing 2 is relatively high in height and the guiding hole 22 is relatively deep. Therefore, it is difficult for the metal bushing 5 and the threaded connector 3 to accurately enter the connection hole 21 or the socket hole 510. The setting of the guiding structure can play a certain guiding role in the installation of the metal bushing 5 and the threaded connector 3, thereby reducing the assembly difficulty of the metal bushing 5 and the threaded connector 3.

[0032] Specifically: A plurality of guiding ribs 221 are provided on the inner wall of the guiding hole 22. The plurality of guiding ribs 221 are circumferentially spaced along the connection hole 21, and the plurality of guiding ribs 221 cooperate to form a guiding structure 220. In other embodiments, the guiding structure can also be formed by one or more guiding blocks.

[0033] The socket part 51 of the metal bushing 5 is inserted into the connection hole 21, and the outer diameter of the socket part 51 is smaller than the inner diameter of the connection hole 21. Therefore, the socket part 51 is not in direct contact with the connection hole 21, and only the abutting part 52 forms an abutting fit with the end face of the second end of the connection hole 21, making the installation of the metal bushing 5 easier. In order to make it easier for the threaded connector 3 to be inserted into the socket hole 510, a tapered guiding structure is provided at one end of the socket hole 510 away from the first housing 1.

[0034] Refer to Figure 1 and Figure 4 As shown, the first housing 1 is an upper housing, the second housing 2 is a lower housing, the first housing 1 is provided with a blind hole 11, the metal nut 4 is fixedly arranged in the blind hole 11, and the opening of the blind hole 11 faces the second housing 2. Since the metal nut 4 in this example is embedded in the first housing 1 by insert molding, the blind hole of the first housing 1 in this example is naturally formed by insert molding. In other embodiments, for the case where the metal nut 4 is installed in the first housing 1 by later interference fit, the blind hole of the first housing 1 is reserved during molding to facilitate the installation and fixation of the metal nut 4.

[0035] The threaded connector 3 in this example is a pan-head combination screw, which includes a screw body 31 and a washer 32. The head of the screw body 31 is the head of the threaded connector 3, so that the head of the threaded connector 3 indirectly abuts against the abutting portion 52 through the washer 32. More specifically, the washer 32 of the pan-head combination screw includes an elastic washer and a flat washer.

[0036] In this example, the battery is a lithium battery; in other embodiments, the battery may also be other types of batteries such as lead-acid batteries, nickel-chromium batteries, and hydrogen energy batteries.

[0037] In the above embodiment, the first housing 1 is an upper housing, and the second housing 2 is a lower housing. The screw is installed from bottom to top to sequentially connect the lower housing and the upper housing. In other embodiments, it is also feasible to swap the first housing 1 and the second housing 2, that is, the first housing 1 is used as the lower housing, and the second housing 2 is used as the upper housing. At this time, the screw is installed from top to bottom to sequentially connect the upper housing and the lower housing. Among them, the lower housing is a container for installing the battery, and the upper housing is a cover body covering the opening of the lower housing. After the upper housing and the lower housing are assembled, the direction of the lower housing relative to the upper housing is down, and the opposite direction is up.

[0038] Although the present invention has been specifically shown and described in combination with the preferred embodiments, those skilled in the art should understand that the remaining parts not described are the prior art, and various changes made to the present invention in form and details without departing from the spirit and scope of the present invention defined by the appended claims all fall within the protection scope of the present invention.

Claims

1. A battery housing assembly, comprising a first housing, a second housing and a threaded connector connecting the first housing and the second housing, wherein the first housing and the second housing are both plastic parts, characterized in that: The first shell is embedded with a metal nut, and the second shell is provided with a metal sleeve. The metal sleeve includes a sleeve portion and an abutment portion. The abutment portion extends radially outward from the sleeve portion. The sleeve portion is provided with a sleeve hole. The threaded connector passes through the sleeve hole and is connected to the metal nut. The head of the threaded connector abuts against the abutment portion so that the second shell forms indirect contact with the head of the threaded connector.

2. A battery housing assembly according to claim 1, characterized in that: The contact between the abutting portion and the second shell is surface contact.

3. A battery housing assembly according to claim 2, characterized in that: A contact surface between the abutting portion and the second shell is a plane.

4. A battery housing assembly according to claim 3, characterized in that: The second shell is provided with a connecting hole, the end of the connecting hole close to the first shell is the first end of the connecting hole, the end opposite to the first end is the second end, and the end surface of the second end of the connecting hole forms the contact surface.

5. A battery housing assembly according to claim 4, characterized in that: The second shell is provided with a guide hole, which is coaxial with the connecting hole and located at the second end of the connecting hole. The inner diameter of the guide hole is larger than the inner diameter of the connecting hole, and a guide structure is provided at one end of the guide hole close to the connecting hole.

6. A battery housing assembly according to claim 5, characterized in that: The inner wall of the guide hole is provided with a plurality of guide ribs, the plurality of guide ribs are distributed at intervals along the circumference of the connection hole, and the plurality of guide ribs cooperate to form the guide structure.

7. A battery housing assembly according to claim 4, characterized in that: The sleeve portion is inserted into the connecting hole, and the outer diameter of the sleeve portion is smaller than the inner diameter of the connecting hole.

8. The battery housing assembly according to claim 1, characterized in that: A conical guiding structure is provided at one end of the sleeve hole away from the first shell.

9. A battery housing assembly according to claim 1, characterized in that: The first shell is an upper shell, the second shell is a lower shell, the first shell is provided with a blind hole, the metal nut is fixedly disposed in the blind hole, and the opening of the blind hole faces the second shell.

10. The battery housing assembly according to claim 1, characterized in that: The threaded connector is a pan head combination screw, comprising a screw body and a washer, the head of the screw body is the head of the threaded connector, so that the head of the threaded connector indirectly abuts against the abutment portion through the washer; and / or the storage battery is a lithium battery; And / or, the metal is copper.

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