Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack and electric equipment. The battery pack comprises a box cover assembly, a box body assembly, a first fixing piece and a sealant, wherein a first connecting part is arranged on the box cover assembly. A second connecting part is arranged on the box body assembly, the first connecting part and the second connecting part are in lap joint to form a glue groove, and the glue groove is located on the outer side of the box body assembly. The first fixing piece penetrates through the first connecting part and the second connecting part, and the sealant is wound in the sealant groove. The battery pack has relatively high sealing performance; the battery pack is easy to disassemble, and cost is saved. The electric equipment has relatively high sealing performance, and is convenient to disassemble and high in working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and an electrical device. Background Art

[0002] Generally, a battery pack includes a box body and a cover body. The box body and the cover body are hermetically connected by a sealant to form a space for accommodating a battery module. In the prior art, the connection between the box body and the cover body is usually sealed by internal sealant application. However, it is difficult to control the amount of sealant in the internal sealant application method, and the operation is inconvenient, resulting in poor sealing performance between the box body and the cover body. At the same time, the internal sealant application structure makes it difficult to disassemble the battery pack in the prior art.

[0003] Therefore, it is urgent to design a battery pack and an electrical device to solve the above technical problems. Summary of the Utility Model

[0004] The first object of the utility model is to provide a battery pack with high sealing performance; the battery pack is easy to disassemble and cost-saving.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model provides a battery pack, including:

[0007] A box cover assembly, on which a first connection part is provided;

[0008] A box body assembly, on which a second connection part is provided. The first connection part and the second connection part overlap to form a glue groove, and the glue groove is located outside the box body assembly;

[0009] A first fixing member, which penetrates through the first connection part and the second connection part;

[0010] A sealant, which is wound in the glue groove.

[0011] As an alternative technical solution of the battery pack, a first mounting hole is provided on the first connection part, a second mounting hole is provided on the second connection part, the first mounting hole and the second mounting hole are arranged in one-to-one correspondence, the first fixing member penetrates through the first mounting hole and the second mounting hole, and the sealant seals the first fixing member.

[0012] As an alternative technical solution of the battery pack, the box cover assembly includes a first cover body and a second cover body. A receiving groove is provided on the second cover body. The first cover body and the second cover body are detachably connected to open or close the receiving groove; the battery pack further includes a charge and discharge assembly, and the charge and discharge assembly is arranged in the receiving groove.

[0013] As an alternative technical solution of the battery pack, the cover assembly includes a second fixing member, a counterbore is provided in the accommodating groove, and the second fixing member is passed through the first cover body and the counterbore.

[0014] As an alternative technical solution of the battery pack, the cover assembly further includes a sealing ring, the sealing ring is wound around the circumference of the first cover body, and the sealing ring is in interference fit with the side wall of the accommodating groove.

[0015] As an alternative technical solution of the battery pack, the charge and discharge assembly includes a circuit board, at least one charging assembly and at least one discharging assembly, and both the charging assembly and the discharging assembly are electrically connected to the circuit board.

[0016] As an alternative technical solution of the battery pack, the box body assembly includes a plurality of battery cells and a plurality of first foam members, and the battery cells and the first foam members are arranged at intervals and stacked into a battery module.

[0017] As an alternative technical solution of the battery pack, the battery cell includes a positive electrode tab and a negative electrode tab, the negative electrode tab has a first bent portion and a second bent portion connected to each other, and the first bent portion and the second bent portion are overlapped, and the second bent portion is connected to the positive electrode tab.

[0018] As an alternative technical solution of the battery pack, the positive electrode tab is provided with an avoidance position, and the avoidance position is configured to expose a part of the negative electrode tab; the box body assembly further includes a collection wire harness, and the collection wire harness is connected to the exposed negative electrode tab.

[0019] The second object of the present invention is to propose an electrical device, which also has high sealing performance, is easy to disassemble, and has high working efficiency.

[0020] To achieve this purpose, the present invention adopts the following technical solutions:

[0021] The present invention provides an electrical device, the electrical device includes the battery pack described above, and the battery pack is used to provide electrical energy for the electrical device.

[0022] The beneficial effects of the present invention at least include:

[0023] The present utility model provides a battery pack, which includes a case cover assembly, a case body assembly, a first fixing member, and a sealant. Among them, a first connecting portion is provided on the case cover assembly. A second connecting portion is provided on the case body assembly. The first connecting portion and the second connecting portion overlap to form a glue groove, and the glue groove is located outside the case body assembly. The first fixing member passes through the first connecting portion and the second connecting portion, and the sealant is wound in the glue groove. Through the settings of the first fixing member, the first connecting portion, and the second connecting portion, the connection between the case cover assembly and the case body assembly can be realized. At the same time, a glue groove is formed at the overlapping portion of the first connecting portion and the second connecting portion. The glue groove is located outside the case body assembly, and the sealant is wound in the glue groove. The setting of the glue groove facilitates the operator to apply glue, so that a circle of sealant can be formed on the glue groove to realize the sealed connection between the case cover assembly and the case body assembly and improve the sealing performance. At the same time, the glue groove is located outside the case body assembly, which is conducive to the operator to apply glue and can flexibly control the amount of glue applied, thereby improving the sealing performance of the case cover assembly and the case body assembly.

[0024] When it is necessary to disassemble the battery pack, the operator can conveniently remove the sealant from the outside of the battery pack, and then release the connection of the first fixing member, thereby realizing the detachable connection between the case cover assembly and the case body assembly, enabling the operator to disassemble the battery pack, and thus eliminating the need to adopt the disassembly method of damaging the battery pack in the prior art, achieving the purpose of cost savings.

[0025] The present utility model also provides an electrical equipment, which has high sealing performance, is convenient to disassemble, and has high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0027] Figure 1 is a schematic structural diagram of the battery pack provided by the embodiment of the present utility model;

[0028] Figure 2 is an exploded view of the battery pack provided by the embodiment of the present utility model;

[0029] Figure 3 is Figure 2 a partial enlarged view of A in;

[0030] Figure 4 is an exploded view of the case cover assembly provided by the embodiment of the present utility model;

[0031] Figure 5 is an exploded view of the box assembly provided by the embodiment of the present utility model;

[0032] Figure 6 is Figure 5 a partial enlarged view of position B in

[0033] Reference numerals

[0034] 100, box cover assembly; 110, first connecting part; 1101, first mounting hole; 120, first cover body; 130, second cover body; 140, accommodating groove; 1401, counterbore; 150, second fixing member; 160, sealing ring; 200, box assembly; 210, second connecting part; 2101, second mounting hole; 220, glue groove; 230, acquisition wire harness; 240, power cable; 250, handle; 300, first fixing member; 400, sealant; 500, charge and discharge assembly; 510, circuit board; 520, charging assembly; 530, discharging assembly; 600, battery module; 610, battery cell; 6101, positive electrode tab; 6102, negative electrode tab; 6103, first bending part; 6104, second bending part; 6105, avoidance position; 620, first foam member; 630, side plate; 640, fiberglass tape; 650, insulating member; 660, second foam member; 670, foaming glue. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0041] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having 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 utility model and should not be construed as a limitation to the present utility model.

[0042] This embodiment provides a battery pack, which has high sealing performance; the battery pack is easy to disassemble and saves costs.

[0043] Such as Figures 1 - 3As shown, the battery pack mainly includes a cover assembly 100, a box body assembly 200, a first fixing member 300, and a sealant 400. Among them, a first connection portion 110 is provided on the cover assembly 100. A second connection portion 210 is provided on the box body assembly 200. The first connection portion 110 and the second connection portion 210 overlap to form a glue groove 220, and the glue groove 220 is located outside the box body assembly 200. The first fixing member 300 passes through the first connection portion 110 and the second connection portion 210, and the sealant 400 is wound in the glue groove 220, and the sealant 400 seals the first fixing member 300.

[0044] Based on the above design, in this embodiment, through the settings of the first fixing member 300, the first connection portion 110, and the second connection portion 210, the connection between the cover assembly 100 and the box body assembly 200 can be realized. At the same time, a glue groove 220 is formed at the overlapping portion of the first connection portion 110 and the second connection portion 210. The glue groove 220 is located outside the box body assembly 200, and the sealant 400 is wound in the glue groove 220. The setting of the glue groove 220 facilitates the operator to apply glue, so that a circle of sealant 400 can be formed on the glue groove 220, realizing the sealed connection between the cover assembly 100 and the box body assembly 200 and improving the sealing performance. At the same time, the glue groove 220 is located outside the box body assembly 200, which is beneficial for the operator to apply glue and can flexibly control the amount of glue applied, thereby improving the sealing performance between the cover assembly 100 and the box body assembly 200. In addition, the sealant 400 seals the connection portion of the first fixing member 300, which can reduce or avoid the phenomenon of rust or damage of the first fixing member 300, improve the safety performance, and extend the service life.

[0045] When the battery pack needs to be disassembled, the operator can conveniently remove the sealant 400 from the outside of the battery pack, and then release the connection of the first fixing member 300, thereby realizing the detachable connection between the cover assembly 100 and the box body assembly 200, enabling the operator to disassemble the battery pack, and thus eliminating the need to adopt the disassembly method that damages the battery pack in the prior art, achieving the purpose of cost savings.

[0046] As Figures 1 - 3 shown, in this embodiment, a first mounting hole 1101 is provided on the first connection portion 110, a second mounting hole 2101 is provided on the second connection portion 210, the first mounting hole 1101 and the second mounting hole 2101 are arranged in one-to-one correspondence, and the first fixing member 300 passes through the first mounting hole 1101 and the second mounting hole 2101.

[0047] Through the settings of the first mounting hole 1101 and the second mounting hole 2101, the stable connection between the first connection portion 110 and the second connection portion 210 can be realized, avoiding the phenomena of loosening and shaking instability of the cover assembly 100 and the box body assembly 200.

[0048] Optionally, both the first mounting holes 1101 and the second mounting holes 2101 in this embodiment can be provided in multiple numbers, and the multiple first mounting holes 1101 are equally spaced, and the multiple second mounting holes 2101 are equally spaced, thereby improving the stress conditions of the first connecting portion 110 and the second connecting portion 210 and avoiding stress concentration.

[0049] As Figure 4 shown, in this embodiment, the lid assembly 100 includes a first lid 120 and a second lid 130. A receiving groove 140 is provided on the second lid 130. The first lid 120 is detachably connected to the second lid 130 to open or close the receiving groove 140; the battery pack further includes a charge and discharge assembly 500, and the charge and discharge assembly 500 is disposed in the receiving groove 140.

[0050] By providing the detachable connection between the first lid 120 and the second lid 130, when the charge and discharge assembly 500 is damaged, the operator only needs to detach the first lid 120 to repair and replace the charge and discharge assembly 500, without disassembling the lid assembly 100 and the box body assembly 200, thereby improving work efficiency.

[0051] As Figure 4 shown, in this embodiment, the lid assembly 100 includes a second fixing member 150. A counterbore 1401 is provided in the receiving groove 140, and the second fixing member 150 passes through the first lid 120 and the counterbore 1401. The provision of the counterbore 1401 is beneficial to the connection between the first lid 120 and the second lid 130. The counterbore 1401 can provide a certain supporting surface for the first lid 120, thereby improving the convenience and reliability of the connection of the first lid 120. At the same time, the charge and discharge assembly 500 is located below the counterbore 1401, avoiding interference with the first lid 120.

[0052] Optionally, the second fixing members 150 can be provided in multiple numbers, and the multiple second fixing members 150 are equally spaced to improve the stress conditions of the first lid 120 and avoid stress concentration.

[0053] Optionally, the first fixing member 300 and the second fixing member 150 can be provided as components such as screws and bolts.

[0054] As Figure 4 shown, in this embodiment, the lid assembly 100 further includes a sealing ring 160. The sealing ring 160 is wound around the circumference of the first lid 120, and the sealing ring 160 is in interference fit with the side wall of the receiving groove 140. By providing the first sealing ring 160, the sealing performance of the connection between the first lid 120 and the second lid 130 can be improved, thereby preventing foreign matters such as moisture and dust from the outside from entering the inside of the receiving groove 140 to contaminate the charge and discharge assembly 500 and improving safety.

[0055] It is understandable that the sealing ring 160 in this embodiment is arranged offset from the second fixing member 150, thereby not affecting the installation of the second fixing member 150 and improving the convenience of installing the second fixing member 150.

[0056] As Figure 4 shown, in this embodiment, the charging and discharging assembly 500 includes a circuit board 510, at least one charging assembly 520, and at least one discharging assembly 530. Both the charging assembly 520 and the discharging assembly 530 are electrically connected to the circuit board 510, and the circuit board 510 is electrically connected to the battery module 600 in the box body assembly 200, thereby facilitating charging or discharging of the battery module 600.

[0057] Optionally, the number of the charging assembly 520 and the discharging assembly 530 is not limited in this embodiment.

[0058] As Figure 5 shown, in this embodiment, the box body assembly 200 further includes a plurality of battery cells 610 and a plurality of first foam members 620. The battery cells 610 and the first foam members 620 are arranged at intervals and stacked to form a battery module 600.

[0059] The battery module 600 further includes side plates 630, insulating members 650, fiberglass tapes 640, second foam members 660, and foaming agents 670. Both the side plates 630 and the insulating members 650 are provided in two. The two side plates 630 are attached to both sides of the battery module 600 and wound together by the fiberglass tapes 640. The two insulating members 650 are respectively arranged at the top and bottom of the battery module 600. The surface of the second foam member 660 is provided with glue and attached to the side plates 630. The second foam member 660 is used to fill the gap between the side plates 630 and the inner wall of the box body assembly 200, and the foaming agent 670 is used to fill the gap between the battery module 600 and the inner wall of the box body assembly 200, thereby improving the stability of the battery module 600 in the box body assembly 200 and avoiding the phenomenon of the battery module 600 shaking.

[0060] As Figures 5 - 6 shown, the battery cell 610 in this embodiment includes a positive electrode tab 6101 and a negative electrode tab 6102. The negative electrode tab 6102 has a first bending portion 6103 and a second bending portion 6104 that are connected to each other. The second bending portion 6104 is connected to the positive electrode tab 6101. By bending the negative electrode tab 6102 twice to form an overlapping first bending portion and a second bending portion, the welding reliability between the negative electrode tab 6102 and the positive electrode tab 6101 can be increased, and the phenomenon of virtual soldering or soldering through can be avoided or reduced when the negative electrode tab 6102 and the positive electrode tab 6101 are welded, thereby improving the welding yield.

[0061] As Figures 5 - 6As shown, in this embodiment, the positive electrode tab 6101 is provided with an avoidance position 6105, and the avoidance position 6105 is configured to expose a part of the negative electrode tab 6102; the box body assembly 200 further includes a collection wire harness 230, and the collection wire harness 230 is connected to the exposed negative electrode tab 6102. By providing the avoidance position 6105, the stability and reliability of the connection between the collection wire harness 230 and the negative electrode tab 6102 can be improved, and the phenomenon of poor soldering such as loosening can be avoided.

[0062] Optionally, in this embodiment, the collection wire harness 230 and the exposed negative electrode tab 6102 can be welded and connected by soldering.

[0063] Optionally, the avoidance position 6105 in this embodiment can be set as a triangular notch, an arc notch, a square notch, etc.

[0064] Optionally, the battery pack in this embodiment further includes a power cable 240, and the power cable 240 is welded to the battery module 600, for example, it can be welded by soldering. The power cable 240 is mainly used for the transmission of large current and high voltage; the collection wire harness 230 is mainly used for the monitoring and signal transmission of the battery pack status.

[0065] As Figure 5 shown, a handle 250 is further provided on the box body assembly 200 in this embodiment, which is convenient for the operator to carry and transfer the battery pack, and improves work efficiency.

[0066] This embodiment also provides an electrical device, and the electrical device includes the above-mentioned battery pack, and the battery pack is used to provide electrical energy for the electrical device.

[0067] Since the electrical device has the above-mentioned battery pack, therefore, the electrical device also has high sealing performance, is convenient to disassemble, and has high work efficiency.

[0068] Obviously, the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

[0069] Note that in the description of this specification, the descriptions referring to the reference terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A battery pack, characterized in that: include: A box cover assembly (100), wherein the box cover assembly (100) is provided with a first connecting portion (110); A box assembly (200), wherein a second connecting portion (210) is provided on the box assembly (200), the first connecting portion (110) and the second connecting portion (210) overlap to form a glue groove (220), and the glue groove (220) is located outside the box assembly (200); A first fixing member (300), the first fixing member (300) being inserted through the first connecting portion (110) and the second connecting portion (210); The sealant (400) is wound in the sealant groove (220).

2. The battery pack according to claim 1, characterized in that: The first connecting portion (110) is provided with a first mounting hole (1101), the second connecting portion (210) is provided with a second mounting hole (2101), the first mounting hole (1101) and the second mounting hole (2101) are arranged in a one-to-one correspondence, the first fixing member (300) is passed through the first mounting hole (1101) and the second mounting hole (2101); and the sealant (400) seals the first fixing member (300).

3. The battery pack according to claim 1, characterized in that: The box cover assembly (100) comprises a first cover body (120) and a second cover body (130), the second cover body (130) being provided with a receiving groove (140), the first cover body (120) and the second cover body (130) being detachably connected to open or close the receiving groove (140); the battery pack further comprises a charge and discharge assembly (500), the charge and discharge assembly (500) being arranged in the receiving groove (140).

4. The battery pack according to claim 3, characterized in that: The box cover assembly (100) comprises a second fixing member (150), a sink (1401) is arranged in the receiving groove (140), and the second fixing member (150) is passed through the first cover body (120) and the sink (1401).

5. The battery pack according to claim 4, characterized in that: The box cover assembly (100) further comprises a sealing ring (160), the sealing ring (160) being arranged around the circumference of the first cover body (120), and the sealing ring (160) being interference fit with the side wall of the accommodating groove (140).

6. The battery pack according to claim 3, characterized in that: The charging and discharging assembly (500) comprises a circuit board (510), at least one charging assembly (520) and at least one discharging assembly (530), wherein both the charging assembly (520) and the discharging assembly (530) are conductively connected to the circuit board (510).

7. The battery pack according to claim 1, characterized in that: The box assembly (200) comprises a plurality of battery cells (610) and a plurality of first foam members (620), wherein the battery cells (610) and the first foam members (620) are arranged at intervals and stacked to form a battery module (600).

8. The battery pack according to claim 7, characterized in that: The battery cell (610) includes a positive electrode ear (6101) and a negative electrode ear (6102), wherein the negative electrode ear (6102) has a first bending portion (6103) and a second bending portion (6104) which are connected to each other, and the first bending portion and the second bending portion are arranged overlappingly, and the second bending portion (6104) is connected to the positive electrode ear (6101).

9. The battery pack according to claim 8, characterized in that: The positive electrode lug (6101) is provided with an avoidance position (6105), and the avoidance position (6105) is configured to expose a portion of the negative electrode lug (6102); the box assembly (200) further comprises a collection harness (230), and the collection harness (230) is connected to the exposed negative electrode lug (6102).

10. Electrical equipment, characterized in that: The electrical device comprises the battery pack according to any one of claims 1 to 9, and the battery pack is used to provide electrical energy to the electrical device.

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