Battery shell and battery pack

Abstract

The battery shell comprises a shell cover body and a shell main body, the shell main body comprises an outer shell body and a support, and the support is fixedly installed on the side, facing the shell cover body, of the outer shell body. Wherein the shell cover body is provided with a first protective layer and a second protective layer, a sealant is filled between the first protective layer and the second protective layer, and the shell cover body is hermetically connected with the shell main body. The battery shell and the battery pack disclosed by the utility model are high in waterproof and impact-resistant capabilities.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery casing and a battery pack. Background Art

[0002] The battery casing is an important component of the battery. It can protect the electrolyte and positive and negative electrode materials inside it and prevent the battery from being affected by the external environment during use, such as collision, vibration, humidity and other external interference. At the same time, the battery casing also supports and fixes the internal structure of the battery to ensure the stability and safety of the battery. With the continuous advancement of science and technology, the technology of battery casings is also constantly updated and upgraded to meet the needs of different fields and different application scenarios.

[0003] When using traditional devices, there are the following technical problems: the external protective layer of the battery shell is damaged after being stressed, resulting in the risk of waterproof failure, thus affecting the normal operation of the internal power module. Therefore, a more reliable battery shell is needed to protect the normal operation of its internal structure in harsh environments. Utility Model Content

[0004] In order to overcome the problem of protection failure of the battery casing in the related art when facing external interference, the present disclosure provides a battery casing that can still provide protection function when the outer shell is damaged and has better waterproof sealing.

[0005] In order to achieve the above object, according to one aspect of the present disclosure, a battery shell is provided, comprising a shell cover and a shell body, wherein the shell body comprises a shell body and a bracket, and the bracket is mounted and fixed on a side of the shell body facing the shell cover. The shell cover has a first protective layer and a second protective layer, and a sealant is filled between the first protective layer and the second protective layer, and the shell cover is sealed and connected to the shell body.

[0006] Furthermore, the first protective layer is arranged on the outer side of the shell cover body facing the shell body, and the second protective layer is arranged on the inner side of the shell cover body facing the shell body.

[0007] Furthermore, a reinforced connection structure is provided between the first protective layer and the second protective layer.

[0008] Furthermore, the shell body further comprises at least one first fastener, the bracket is fixed to the outer shell via the at least one first fastener, and a sealing member is provided in the gap formed by the bracket and the outer shell.

[0009] Furthermore, the sealing member is a sealing colloid or a sealing ring.

[0010] Furthermore, the shell body further comprises a PCBA board and at least one second fastener, and the PCBA board is mounted on a side of the bracket facing the shell cover through the at least one second fastener.

[0011] Furthermore, the shell cover includes at least one third fastener, and the shell cover is fixed to the bracket by at least one third fastener, and the sealant is fitted with the seal to fix the shell cover to the shell body.

[0012] Furthermore, a flange is arranged around the side of the bracket facing the shell cover, and at least one first positioning portion is arranged inside the flange.

[0013] Further, the flange is arranged on a side of the second protective layer away from the first protective layer and abuts against the second protective layer, and the first positioning portion cooperates with the third fastener.

[0014] According to another aspect of the present disclosure, a battery pack is provided, comprising a battery cell and a battery casing as described above, wherein the battery cell is disposed in the battery casing.

[0015] Compared with the traditional technology, the present invention has the following beneficial effects: the present invention sets up a double-layer protection structure, so that when the first protection layer fails, the sealant layer and the second protection layer also have waterproof and impact resistance capabilities, the shell cover is sealed and connected to the shell body, and has strong waterproof and impact resistance, and the protection level can reach IP67. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0017] Figure 1 is a schematic diagram of a battery housing according to an embodiment of the present disclosure;

[0018] Figure 2 It is a schematic diagram of the lower cover structure of a battery housing according to an embodiment of the present disclosure;

[0019] Figure 3 An exploded view of an outer shell and a bracket of a battery housing according to an embodiment of the present disclosure;

[0020] Figure 4 An exploded view of a shell body and a shell cover of a battery shell according to an embodiment of the present disclosure;

[0021] Figure 5 A schematic diagram of a bracket structure of a battery housing according to an embodiment of the present disclosure;

[0022] Figure 6The invention is an exploded view of a battery housing including a decorative cover according to an embodiment of the present disclosure.

[0023] Description of reference numerals:

[0024] Shell cover 1, shell body 2, first protective layer 3, second protective layer 4, gap 5, hole 6, second positioning part 7, first fastener 8, bracket 9, outer shell 10, battery cell 11, PCBA board 12, second fastener 13, lower cover 14, seal 15, second connecting part 16, third fastener 17, waterproof cover 18, flange 19, first connecting part 20, first positioning part 21, decorative cover 22, fourth fastener 23, rubber pad 24. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the present disclosure can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to enable those skilled in the art to better understand the scheme of the present disclosure, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only embodiments of a part of the present disclosure, not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work should fall within the scope of protection of the present disclosure.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. In addition, in the description with reference to the drawings, the same marks in different drawings represent the same elements.

[0028] According to one aspect of the present disclosure, Figure 1-6 As shown, a battery shell is provided, which includes a shell cover body 1 and a shell body 2, the shell body 2 includes an outer shell 10 and a bracket 9, the bracket 9 is installed and fixed on the side of the outer shell 10 facing the shell cover body 1, wherein the shell cover body 1 has a first protective layer 3 and a second protective layer 4, and sealant is filled between the first protective layer 3 and the second protective layer 4, and the shell cover body 1 is sealed and connected to the shell body 2.

[0029] By having a double-layer protective structure of the shell cover 1, when the first protective layer 3 fails to protect, the sealant and the second protective layer 4 also have waterproof and impact resistance capabilities, and the protection level can reach IP67.

[0030] In one embodiment of the present disclosure, Figure 2 As shown, the first protective layer 3 is arranged on the outer side of the shell cover 1 facing the shell body 2, and the second protective layer 4 is arranged on the inner side of the shell cover 1 facing the shell body 2.

[0031] In one embodiment of the present disclosure, a reinforced connection structure is provided between the first protective layer 3 and the second protective layer 4 .

[0032] In the present disclosure, there is no limitation on what kind of reinforcement structure is provided between the first protective layer 3 and the second protective layer 4. In one embodiment of the present disclosure, Figure 2 As shown, the reinforcement structure adopts a grid structure, that is, a spacer or a support rod perpendicular to the extension direction of the first protective layer 3 and the second protective layer 4 and connecting the first protective layer 3 and the second protective layer 4. The reinforcement structure has the function of conducting and dispersing force, further improving the force bearing capacity of the protective layer. The gap 5 is surrounded by the first protective layer 3, the second protective layer 4 and the reinforcement structure, and the sealant is filled in the gap 5. The provision of the reinforcement structure also reduces the amount of sealant used and reduces the manufacturing cost.

[0033] In other embodiments, the reinforcement structure may also be a collapsible energy-absorbing structure, and its shape may be a plate, a rod or a polygonal structure.

[0034] In one embodiment of the present disclosure, Figure 3 and Figure 4 As shown, the shell body 2 further includes at least one first fastener 8 , the bracket 9 is fixed to the outer shell 10 via the at least one first fastener 8 , and a seal 15 is provided in the gap formed by the bracket 9 and the outer shell 10 .

[0035] In one embodiment of the present disclosure, Figure 4 As shown, the sealing member 15 is a sealing colloid or a sealing ring.

[0036] In one embodiment of the present disclosure, Figure 5 As shown, the bracket 9 is provided with at least one first connection portion 20 distributed at intervals on the outer side around the side facing the outer shell 10. The first connection portion 20 provides a locking position for the first fastener 8.

[0037] In the present disclosure, there is no limitation on the connection structure between the bracket 9 and the outer shell 10. In one embodiment of the present disclosure, Figure 3 and Figure 5As shown, the first connection portion 20 is a screw hole, and the first fastener 8 adopts a hexagonal cylindrical head M3 screw, and the material is carbon steel zinc-nickel alloy. After locking, the bracket 9 and the outer shell 10 will not move relative to each other due to external force, thereby ensuring the connection stability between the battery shell structure.

[0038] In other embodiments, the bracket 9 and the outer shell 10 may be connected in a riveted structure, a welded structure, a clamping structure, or a keyway structure, or in one or more ways.

[0039] In one embodiment of the present disclosure, Figure 3 As shown, the shell body 2 further includes a PCBA board 12 and at least one second fastener 13 , and the PCBA board 12 is mounted on a side of the bracket 9 facing the shell cover 1 through the at least one second fastener 13 .

[0040] In one embodiment of the present disclosure, further, Figure 3 and Figure 5 As shown, at least one first positioning portion 21 is fixed to the top side of the bracket 9. The first positioning portion 21 guides the assembly of the PCBA board 12, facilitating the installation of the PCBA board 12. At the same time, the bracket 9 separates the PCBA board 12 from the battery cell 11, providing protection for the PCBA board 12.

[0041] In the present disclosure, there is no limitation on the connection structure between the PCBA board 12 and the bracket 9. In one embodiment of the present disclosure, Figure 3 As shown, the second fastener 13 adopts a combination of a hexagonal pan head M3 screw, a spring washer and a flat washer, which increases the contact area between the second fastener 13 and the PCBA board 12, prevents the loosening of the connection, and reduces the loss of the second fastener 13 to the surface of the PCBA board 12 when locking.

[0042] In other embodiments, the second fastener 13 may adopt one or more of a welding structure, a clamping structure and a keyway structure.

[0043] In one embodiment of the present disclosure, Figure 4 As shown, the shell cover 1 includes at least one third fastener 17 , and the shell cover 1 is fixed to the bracket 9 via the at least one third fastener 17 . The sealant fits the sealant 15 , so that the shell cover 1 is fixed to the shell body 2 .

[0044] In one embodiment of the present disclosure, Figure 5 As shown, a flange 19 is arranged around the side of the bracket 9 facing the shell cover 1 , and at least one first positioning portion 21 is arranged inside the flange 19 .

[0045] In the present disclosure, there is no limitation on the connection structure between the housing cover 1 and the bracket 9. In one embodiment of the present disclosure, Figure 2, Figure 4 and Figure 5 As shown, the shell cover body 1 includes a lower cover 14, and the lower cover 14 is provided with spaced second positioning portions 7 around the side facing the shell body 2. The second positioning portions 7 cooperate with the first positioning portions 21 to provide a locking position for the third fastener 17. The third fastener 17 can be a screw connection, a clamping structure or a welded part, and the first positioning portion 21 is a positioning column fixed to the surface of the bracket 9, and the second positioning portion 7 is a positioning column fixed to the surface of the lower cover 14.

[0046] In one embodiment of the present disclosure, further, Figure 4 and Figure 5 As shown, the flange 19 is arranged on a side of the second protective layer 4 away from the first protective layer 3 and abuts against the second protective layer 4 , and the first positioning portion 21 cooperates with the third fastener 17 .

[0047] The bracket 9 provides a uniform and effective locking position for the third fastener 17, and the contact surface between the shell cover 1 and the shell body 2 is sealed. At the same time, the sealant and the sealant 15 are fitted to form an overall sealing structure, which can effectively disperse the force of the shell cover 1 relative to the shell body 2, and at the same time enhance the sealing and integrity of the battery shell.

[0048] The flange 19 around the bracket 9 provides positioning for the installation of the lower cover 14. The flange 19 abuts against the second protective layer 4, so that the lower cover 14 and the outer shell 10 are aligned, ensuring the contact between the sealant and the seal 15, reducing the difficulty of assembly.

[0049] According to another aspect of the present disclosure, a battery pack is provided, including a battery cell 11 and the above-mentioned battery casing, wherein the battery cell 11 is disposed in the battery casing.

[0050] In order to further protect the internal components of the battery pack from external interference, in one embodiment of the present disclosure, Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the shell cover body 1 also includes a waterproof cover 18, a decorative cover 22, a fourth fastener 23 and a rubber pad 24; a waterproof cover 18 is arranged on the top of the lower cover 14, and the decorative cover 22 is fixed by at least one fourth fastener 23, the decorative cover 22 and the waterproof cover 18 cooperate to prevent external moisture from entering the interior of the battery shell through the hole 6 at the top of the shell cover body 1, and the top of the decorative cover 22 is fitted with a rubber pad 24, the rubber pad 24 not only ensures the appearance of the product, but also prevents water accumulation at the fourth fastener 23 in the decorative cover 22, thereby increasing the service life of the fourth fastener 23.

[0051] In the present disclosure, there is no limitation on the connection structure between the decorative cover 22 and the lower cover 14, and a screw connection, a clamping structure or a welding part may be used. In one embodiment of the present disclosure, Figure 2 and Figure 6 As shown, the fourth fastener 23 adopts ST3 hexagonal pan head self-tapping screw, which is made of carbon steel zinc-nickel alloy. After being locked, the strength meets the design requirements, and the tapping operation is eliminated. The fixing force is strong, ensuring the simplicity and firmness of the connection between the lower cover 14 and the decorative cover 22.

[0052] In one embodiment of the present disclosure, further, Figure 6 As shown, the decorative cover 22 can be made of PC or ABS material to reduce the overall weight of the device.

[0053] In one embodiment of the present disclosure, further, Figure 4 As shown, the waterproof cover 18 can be made of PC material, and the bottom of the waterproof cover 18 is in a grid shape, which not only ensures the structural strength of the device but also reduces the production cost.

[0054] The installation process of a battery pack provided by the present invention is as follows: a battery cell 11 to be protected is placed in the inner cavity of the shell body 2, and the first fastener 8 is locked after the bracket 9 is installed on the outer shell 10, and the PCBA board 12 is installed on the top of the bracket 9 through the second fastener 13, and the seal 15 is filled in the gap between the outer shell 10 and the bracket 9, and then the shell cover 1 is covered, and the flange 19 around the bracket 9 abuts the second protective layer 4, which ensures that the shell cover 1 and the outer shell 10 are installed in alignment, and the sealant between the first protective layer 3 and the second protective layer 4 is fitted and connected with the seal 15, forming a battery shell structure that takes both waterproofing and force-bearing into account.

[0055] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the present disclosure. The present disclosure may be subject to various changes and improvements without departing from the spirit and scope of the present disclosure. These changes and improvements fall within the scope of the present disclosure to be protected. The scope of protection claimed by the present disclosure is defined by the attached claims and their equivalents.

Claims

1. A battery casing, characterized in that: include: Shell cover (1); as well as The shell body (2) comprises an outer shell (10) and a bracket (9), wherein the bracket (9) is mounted and fixed on a side of the outer shell (10) facing the shell cover (1); The shell cover (1) comprises a first protective layer (3) and a second protective layer (4), and a sealant is filled between the first protective layer (3) and the second protective layer (4), and the shell cover (1) is sealed and connected to the shell body (2).

2. A battery casing according to claim 1, characterized in that: The first protective layer (3) is arranged on the outer side of the shell cover (1) facing the shell body (2), and the second protective layer (4) is arranged on the inner side of the shell cover (1) facing the shell body (2).

3. A battery casing according to claim 2, characterized in that: A reinforced connection structure is provided between the first protective layer (3) and the second protective layer (4).

4. A battery casing according to claim 1, characterized in that: The shell body (2) further comprises at least one first fastener (8), the bracket (9) is fixed to the outer shell (10) via the at least one first fastener (8), and a sealing member (15) is provided in a gap formed by the bracket (9) and the outer shell (10).

5. A battery casing according to claim 4, characterized in that: The sealing member (15) is a sealing colloid or a sealing ring.

6. A battery casing according to claim 1, characterized in that: The shell body (2) further comprises a PCBA board (12) and at least one second fastener (13); the PCBA board (12) is mounted on a side of the bracket (9) facing the shell cover (1) via the at least one second fastener (13).

7. According to the claim 5 The battery casing is characterized in that: The shell cover (1) comprises at least one third fastener (17), and the shell cover (1) is fixed to the bracket (9) via the at least one third fastener (17). The sealant is in contact with the seal (15), so that the shell cover (1) is fixed to the shell body (2).

8. According to the claim 7 The battery casing is characterized in that: A flange (19) is arranged around the side of the bracket (9) facing the shell cover (1), and at least one first positioning portion (21) is arranged inside the flange (19).

9. A battery casing according to claim 8, characterized in that: The flange (19) is arranged on a side of the second protective layer (4) away from the first protective layer (3) and abuts against the second protective layer (4), and the first positioning portion (21) cooperates with the third fastener (17).

10. A battery pack, characterized in that: It comprises a battery cell (11) and a battery casing according to claim 1, wherein the battery cell (11) is arranged in the battery casing.

Images