Battery pack and electric device

Abstract

The utility model relates to power battery technical field discloses a kind of battery pack and electric device, battery pack includes: shell, battery module and sealant, shell includes first shell and second shell, first shell is provided with opening, second shell cover is set on opening, first shell and second shell form mounting cavity by enclosing, first shell and second shell are connected to form integrated structure;Battery module is set in mounting cavity, battery module includes frame, and the outer periphery of the end of frame close to opening is provided with glue groove;Sealant is set in glue groove.The utility model is by injecting sealant at the glue groove on frame, to realize the inside sealing of battery pack shell, by first shell and second shell form integrated structure, realize the outside sealing of battery pack shell, to realize the double sealing of battery pack whole, improve the sealing effect of battery pack, improve the reliability and safety of battery pack;While meeting the sealing requirement, simplify structure design.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to battery pack and electric device. BACKGROUND

[0002] With the rapid development of new energy, battery pack is favored because of its high energy density and energy conversion efficiency, and is widely used in electric bicycles, skateboards and other products. For the battery pack, the sealing of the battery pack is crucial, and the sealing design can prevent external moisture, dust, chemicals and other substances from entering the inside of the battery pack, thereby improving the service life and stability of the battery.

[0003] The battery pack in the prior art adopts an aluminum barrel upper and lower shell structure, and uses a dispensing method for whole package sealing. However, the sealing effect of such battery pack is not ideal. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a battery pack and an electric device to solve the problem of the ideal sealing effect of the battery pack.

[0005] In a first aspect, the utility model provides a battery pack, which comprises: a shell comprising a first shell and a second shell, the first shell is provided with an opening, the second shell cover is arranged on the opening, the first shell and the second shell are enclosed to form a mounting cavity, and the first shell and the second shell are connected to form an integral structure; a battery module arranged in the mounting cavity, the battery module comprises a frame, and a glue groove is formed in the outer periphery of one end of the frame close to the opening; sealing glue arranged in the glue groove to seal the gap between the battery module and the first shell.

[0006] Advantages: by injecting sealing glue at the glue groove on the frame, the inside of the battery pack shell is sealed, the first shell and the second shell form an integral structure, the outside of the battery pack shell is sealed, and the double sealing of the whole battery pack is realized, thereby improving the sealing effect of the battery pack and improving the reliability and safety of the battery pack; the first shell and the second shell form an integral structure, which simplifies the structure design, improves the production efficiency and is convenient for processing and manufacturing while meeting the sealing requirements.

[0007] In an alternative embodiment, the battery module further comprises a battery cell and a management module, the battery cell is arranged in the frame, the management module is electrically connected with the battery cell, and the management module is connected with the frame.

[0008] In an alternative embodiment, the battery module further comprises a wire harness structure, the wire harness structure is electrically connected with the management module, the shell is provided with a through hole, and the wire harness structure is arranged through the through hole.

[0009] In an alternative embodiment, the battery pack further comprises a sealing structure, which is arranged at the gap between the wiring harness structure and the perforation.

[0010] Beneficial effects: By arranging a sealing structure at the gap between the wiring harness structure and the perforation, the overall sealing performance of the battery pack is further improved.

[0011] In an alternative embodiment, the battery pack further comprises a stop buckle, which is arranged on the inner wall of the first shell, is arranged close to the opening, and abuts against one side of the battery module facing the opening.

[0012] Beneficial effects: By arranging a stop buckle, the battery module abuts against the stop buckle after entering the first shell, preventing the battery module from moving within the first shell, ensuring the stable fixation of the battery module, and further improving the safety of the battery pack.

[0013] In an alternative embodiment, the first shell is a plastic structure, the stop buckle is integrally arranged with the first shell, and part of the structure of the first shell protrudes towards the mounting cavity to form the stop buckle.

[0014] Beneficial effects: The stop buckle is integrally formed with the first shell, reducing the splicing assembly and the performance problems caused by improper splicing or assembly.

[0015] In an alternative embodiment, the battery pack further comprises an adhesive structure, which is arranged between the outer shell and the battery module, and the two sides of the adhesive structure are respectively bonded with the outer shell and the battery module.

[0016] Beneficial effects: By arranging an adhesive structure, the fixation of the battery module in the outer shell is more stable and reliable, further reducing the shaking of the battery module in the outer shell.

[0017] In an alternative embodiment, the second shell comprises a main body portion, which covers the opening, and the outer periphery of the main body portion is welded with the first shell; or the second shell comprises a main body portion and an extension portion, the extension portion is arranged along the outer peripheral edge of the main body portion, one end of the extension portion is connected with the main body portion, and the other end of the extension portion extends away from the main body portion, the extension portion is sleeved on the first shell, and the main body portion covers the opening.

[0018] Beneficial effects: By arranging an extension portion, the second shell is sleeved on the outer side of the first shell, improving the connection and sealing performance of the first shell and the second shell.

[0019] In an alternative embodiment, the battery pack further comprises a buffer structure, which is attached to the side of the battery module.

[0020] Beneficial effects: by setting the buffer structure, good buffering effect is achieved, avoiding the battery module from being damaged by knocking against the inner wall of the shell; the buffer structure can also improve the waterproof performance of the battery pack, thereby improving the safety of the battery pack.

[0021] In a second aspect, the utility model also provides a kind of electric device, comprising the battery pack described above.

[0022] Beneficial effects: the battery pack used in electric device has the shell of integrated structure, and the safety and sealing performance of battery pack are good, thereby guaranteeing the reliability and safety of electric device. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 It is an explosion structure schematic view of the battery pack of the utility model embodiment;

[0025] Figure 2 It is an overall structure schematic view of the battery pack of the utility model embodiment;

[0026] Figure 3 It is a structure schematic view of the battery module of the utility model embodiment;

[0027] Figure 4 It is Figure 3 A local enlarged schematic view in the middle;

[0028] Figure 5 It is a partial structure schematic view of the battery pack of the utility model embodiment;

[0029] Figure 6 It is Figure 5 A local enlarged schematic view in the middle B;

[0030] Figure 7 It is Figure 5 A local enlarged schematic view in the middle C;

[0031] Figure 8 It is a structure schematic view of one side of the battery module of the utility model embodiment;

[0032] Figure 9It is the internal section view structure schematic diagram of the battery module of the utility model embodiment.

[0033] Figure 10 It is the structure schematic diagram of the shell of the utility model embodiment.

[0034] Mark explanation:

[0035] 10, shell;11, first shell body;12, second shell body;121, perforation;122, main body part;123, extension part;20, battery module;21, frame body;211, glue groove;22, electric core;23, management module;24, wire harness structure;30, fastener;40, stop buckle;50, buffer structure. Specific implementation

[0036] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0037] The embodiment of the utility model will be described below in conjunction with Figures 1 to 10 .

[0038] According to the embodiment of the utility model, the first aspect provides a kind of battery pack, including shell 10, battery module 20 and sealing glue.The shell 10 includes first shell body 11 and second shell body 12, first shell body 11 is provided with opening, second shell body 12 is covered on opening, first shell body 11 and second shell body 12 are enclosed to form installation cavity, first shell body 11 and second shell body 12 are connected to form integrated structure;Battery module 20 is arranged in installation cavity, and battery module 20 includes frame body 21, and glue groove 211 is opened in the outer periphery of the end of frame body 21 close to opening;Sealing glue is arranged in glue groove 211, to seal the gap between battery module 20 and first shell body 11.

[0039] The battery pack of the embodiment is applied, sealing glue is injected at glue groove 211 on frame body 21, to realize the inside sealing of battery pack shell 10, by first shell body 11 and second shell body 12 form integrated structure, realize the outside sealing of battery pack shell 10, to realize the double sealing of battery pack whole, improve the sealing effect of battery pack, improve the reliability and safety of battery pack;First shell body 11 and second shell body 12 form integrated structure, meet the sealing requirement while simplifying structure design, improve the production efficiency, facilitate processing manufacture.

[0040] Specifically, the sealant is filled in the glue groove 211, and the sealant seals the gap between the battery module 20 and the first shell 11, so as to achieve the sealing of the inside of the battery pack.

[0041] It should be noted that the shell 10 is integrally formed by a blow molding process, and after forming, it is cut into the first shell 11 and the second shell 12. After the battery module 20 is arranged in the mounting cavity, the second shell 12 is arranged on the opening to connect the first shell 11 and the second shell 12.

[0042] Specifically, the first shell 11 and the second shell 12 are ultrasonically welded to form an integrated structure.

[0043] In other alternative embodiments, the first shell 11 and the second shell 12 can also be connected to form an integrated structure by bonding, riveting, etc.

[0044] It should be noted that in the related art, the first shell 11 and the second shell 12 are often sealed by dispensing, and the sealing effect is not ideal, and there is a risk of waterproof failure after long-term use.

[0045] It can be understood that the first shell 11 and the second shell 12 are welded, and the sealing effect of welding is better than that of dispensing, and the waterproof effect of welding is better.

[0046] It should be noted that after the first shell 11 and the second shell 12 are connected, sealant can be applied to the connection part of the first shell 11 and the second shell 12 to improve the sealing effect; or a sealing gasket or the like is arranged between the first shell 11 and the second shell 12 to improve the sealing effect.

[0047] In one embodiment, as shown in Figure 1 and Figure 9 The battery module 20 further includes a cell 22 and a management module 23. The cell 22 is arranged in the frame 21, the management module 23 is electrically connected to the cell 22, the management module 23 is connected to the frame 21, and the battery pack further includes a fastener 30. The fastener 30 penetrates the management module 23 and is fastened to the frame 21. The detachable connection of the management module 23 and the frame 21 is realized by the fastener 30, which facilitates the subsequent maintenance and replacement of the battery module 20.

[0048] Specifically, the management module 23 is fixed above the frame 21 by a screw.

[0049] In other alternative embodiments, the management module 23 can also be connected to the rack 21 by welding, bonding or the like. In this alternative embodiment, if the management module 23 needs to be maintained or replaced, the entire battery module 20 needs to be replaced. However, by using the battery module 20 of the present embodiment, the management module 23 can be disassembled and replaced, thereby reducing the workload.

[0050] In one embodiment, as shown in Figures 1 to 3 The battery module 20 further includes a wire harness structure 24 electrically connected to the management module 23. The housing 10 is provided with a through hole 121, and the wire harness structure 24 passes through the through hole 121.

[0051] Specifically, the through hole 121 is provided on the second housing 12.

[0052] In one embodiment, the battery pack further includes a sealing structure arranged at the gap between the wire harness structure 24 and the through hole 121. By adding a sealing structure at the gap between the wire harness structure 24 and the through hole 121, the overall sealing performance of the battery pack is further improved.

[0053] Specifically, the wire harness structure 24 is a wire harness SR (Strain Relief), that is, a wire harness with a positioning buckle formed at the tail of the plug. The wire harness structure 24 realizes the electrical connection between the battery pack and the outside world.

[0054] It should be noted that the positioning buckle is used to eliminate the stress of the wire harness and prevent the core wire at the connection of the wire harness from breaking.

[0055] Specifically, the sealing structure is a sealing glue.

[0056] It should be noted that the wire harness in the existing wire harness structure 24 is usually cylindrical. After the wire harness passes through the through hole 121, there will be a gap between the wire harness and the hole wall. Dust or liquid can easily enter the inside of the battery pack through the gap and affect the performance stability of the battery pack. Therefore, a sealing structure can be added between the wire harness structure 24 and the through hole 121.

[0057] Of course, in other alternative embodiments, the sealing structure can also be a sealing ring. The sealing ring is sleeved on the wire harness structure 24, and the sealing ring blocks the gap between the wire harness structure 24 and the through hole 121 to prevent dust or liquid from easily entering the battery pack through the gap.

[0058] Of course, in other alternative embodiments, the sealing structure can also be a caulking agent, foam or the like.

[0059] In one embodiment, as shown in Figures 5 to 7As shown, the battery pack further comprises a stop buckle 40, which is arranged on the inner wall of the first shell 11 and is arranged close to the opening. The stop buckle 40 abuts against the side of the battery module 20 facing the opening. By arranging the stop buckle 40, the battery module 20 abuts against the stop buckle 40 after entering the first shell 11, preventing the battery module 20 from moving in the first shell 11, ensuring the stable fixation of the battery module 20, and further improving the safety of the battery pack.

[0060] It should be noted that the position of the stop buckle 40 on the inner wall of the first shell 11 needs to be determined according to the size of the battery module 20.

[0061] It should be noted that in the related art, after the battery module 20 enters the installation cavity, due to the difference between the size of the battery module 20 and the size of the shell 10, the battery module 20 will shake in the installation cavity after being affected by external force. During the shaking process, the battery module 20 and the shell 10 will collide and impact, thereby affecting the safety of the battery module 20.

[0062] In one embodiment, as shown in Figures 5 to 7 The first shell 11 is a plastic structure, the stop buckle 40 is integrally arranged with the first shell 11, and part of the structure of the first shell 11 protrudes into the installation cavity to form the stop buckle 40. The stop buckle 40 is integrally formed with the first shell 11, reducing splicing and assembly, and reducing performance problems caused by improper splicing or assembly.

[0063] Specifically, the shell 10 is a blow molded shell. It can be understood that the blow molded shell has good flexibility, and when the battery module 20 enters the inside of the installation cavity, the first shell 11 can be slightly deformed, so the existence of the stop buckle 40 does not affect the entry of the battery module 20 into the installation cavity.

[0064] Further, the shell 10 can be a polymeric plastic material, such as polyethylene, etc.; the shell 10 can also be a metallic plastic material, such as aluminum alloy, etc.

[0065] Specifically, the battery module 20 and the shell 10 are square structures, and the stop buckle 40 is arranged on the edge of the first shell 11.

[0066] It should be noted that the stop buckle 40 can be provided with a plurality of stop buckles 40, which are used to limit the battery module 20.

[0067] In other alternative embodiments, the stop buckle 40 and the first shell 11 can also be separately arranged, and the stop buckle 40 is fixed on the inner wall of the first shell 11 by bonding or ultrasonic welding.

[0068] In one embodiment, the battery pack further comprises an adhesive structure arranged between the shell 10 and the battery module 20, and two surfaces of the adhesive structure are respectively bonded with the shell 10 and the battery module 20. By arranging the adhesive structure, the fixation of the battery module 20 in the shell 10 is more stable and reliable, and the shaking of the battery module 20 in the shell 10 is further reduced.

[0069] Specifically, the adhesive structure is a structural adhesive, which strengthens the fixation stability between the shell 10 and the battery module 20.

[0070] Of course, in other alternative embodiments, the adhesive structure can also be other materials with adhesive function such as UV glue to bond the shell 10 and the battery module 20.

[0071] In one embodiment, as shown in Figure 10 The second shell 12 comprises a main body part 122 and an extension part 123, the extension part 123 is arranged along the outer peripheral edge of the main body part 122, one end of the extension part 123 is connected with the main body part 122, and the other end of the extension part 123 extends in a direction away from the main body part 122, the extension part 123 is sleeved on the first shell 11, and the main body part 122 covers the opening. By arranging the extension part 123, the second shell 12 is at least partially sleeved on the outside of the first shell 11, and the connection sealing property of the first shell 11 and the second shell 12 is improved.

[0072] Specifically, the main body part 122 and the extension part 123 are connected to form a groove structure, and the end of the first shell 11 provided with the opening is embedded in the groove structure.

[0073] In other alternative embodiments, the second shell 12 can also only comprise the main body part 122, the main body part 122 covers the opening, and the outer periphery of the main body part 122 is ultrasonic welded with the first shell 11. It should be noted that, compared with this alternative embodiment, in the present embodiment, the connection position of the opening of the first shell 11 and the second shell 12 is shielded to the inside of the shell 10 by arranging the extension part 123, and thus the sealing effect is improved. Therefore, it is preferred that the second shell 12 is arranged by connecting the main body part 122 and the extension part 123.

[0074] Specifically, the second shell 12 is integrally formed by a blow molding process.

[0075] In other alternative embodiments, the main body part 122 and the extension part 123 can also be separately arranged and combined by an ultrasonic welding or other connection method.

[0076] In one embodiment, as shown in Figure 1As shown, the battery pack further comprises a buffer structure 50 attached to the side of the battery module 20. By arranging the buffer structure 50, the waterproof performance of the battery pack is improved, thereby improving the safety of the battery pack; the buffer structure 50 can also have a good buffering effect, avoiding damage caused by the collision between the battery module 20 and the inner wall of the shell 10.

[0077] Specifically, in the embodiment, the buffer structure 50 is a foam.

[0078] Of course, in other alternative embodiments, the buffer structure 50 can also be an elastic sealing gasket, a rubber block or other structures.

[0079] In the embodiment, the buffer structure 50 is attached to the two sides of the battery module 20, and the stop buckle 40 is arranged on the four ridges of the first shell 11.

[0080] To install the battery pack of the embodiment, first, the management module 23 is fixed above the frame 21 by the fastener 30, the wire harness structure 24 is connected to the management module 23, and the buffer structure 50 is attached to the two sides of the battery module 20; then, the adhesive structure is brushed on the inner wall of the first shell 11, and the battery module 20 is placed in the installation cavity, and the sealant is applied at the glue groove 211 and the wire outlet position of the wire harness structure 24; then, the second shell 12 is arranged on the first shell 11, and ultrasonic welding is used; finally, the perforation 121, the connection part of the first shell 11 and the second shell 12 are glued.

[0081] According to the embodiment of the utility model, the second aspect further provides a kind of electric device, including above-mentioned battery pack. The battery pack used in electric device has the shell 10 of integrated structure, and the safety and sealing performance of battery pack are good, thereby guaranteeing the reliability and safety of electric device.

[0082] It can be understood that using safe and reliable battery pack to supply power can ensure the power stability of electric device and reduce the failure of power supply.

[0083] Although the embodiments of the utility model are described in combination with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the utility model, and such modifications and changes all fall within the scope defined by the utility model.

Claims

1. A battery pack, characterized by, The application relates to a battery pack, which comprises the following parts: an outer shell (10) comprising a first shell (11) and a second shell (12), the first shell (11) is provided with an opening, the second shell (12) covers the opening, the first shell (11) and the second shell (12) enclose a mounting cavity, and the first shell (11) and the second shell (12) are connected to form an integrated structure; a battery module (20) arranged in the mounting cavity, the battery module (20) comprises a frame (21), and a glue groove (211) is arranged on the outer periphery of one end of the frame (21) close to the opening; sealing glue arranged in the glue groove (211) to seal the gap between the battery module (20) and the first shell (11).

2. The battery pack of claim 1, wherein, The battery module (20) further comprises battery cells (22) arranged in the frame (21) and a management module (23) electrically connected with the battery cells (22), and the management module (23) is connected with the frame (21).

3. The battery pack of claim 2, wherein, The battery module (20) further comprises a wire harness structure (24) electrically connected with the management module (23), and the outer shell (10) is provided with a through hole (121), and the wire harness structure (24) penetrates through the through hole (121) and is arranged.

4. The battery pack of claim 3, wherein, The battery pack further comprises a sealing structure arranged at the gap between the wire harness structure (24) and the through hole (121).

5. The battery pack of any one of claims 1-4, wherein, The battery pack further comprises a stop buckle (40) arranged on the inner wall of the first shell (11), the stop buckle (40) is arranged close to the opening, and the stop buckle (40) abuts against one side of the battery module (20) facing the opening.

6. The battery pack of claim 5, wherein, The first shell (11) is a plastic structure, the stop buckle (40) is integrally arranged with the first shell (11), and part of the structure of the first shell (11) protrudes into the mounting cavity to form the stop buckle (40).

7. The battery pack of any one of claims 1-4, wherein, The battery pack further comprises an adhesive structure arranged between the outer shell (10) and the battery module (20), and two sides of the adhesive structure are respectively bonded with the outer shell (10) and the battery module (20).

8. The battery pack of any one of claims 1-4, wherein, The second shell (12) comprises a main body part (122) covering the opening, and the outer periphery of the main body part (122) is welded with the first shell (11); or The second shell (12) comprises a main body part (122) and an extension part (123), the extension part (123) is arranged along the outer peripheral edge of the main body part (122), one end of the extension part (123) is connected with the main body part (122), the other end of the extension part (123) extends away from the main body part (122), the extension part (123) is sleeved on the first shell (11), and the main body part (122) covers the opening.

9. The battery pack of any one of claims 1-4, wherein, The battery pack further includes a buffer structure (50) attached to a side surface of the battery module (20).

10. An electrical device, characterized by A battery pack including the battery pack of any one of claims 1 to 9.

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