High-voltage electric appliance box and battery pack

Abstract

The utility model discloses a high-voltage electric appliance box and a battery pack. The high-voltage electric appliance box comprises a lower shell and an upper shell, the upper shell is connected with the lower shell, an assembling cavity for assembling electronic devices is formed between the lower shell and the upper shell, the upper shell is made by adopting a plastic uptake process, the wall thickness of the upper shell is d millimeters, and d is more than or equal to 0.4 and less than or equal to 0.6. The lower shell serves as a base shell and is mainly used for bearing electronic devices, the upper shell serves as a cover shell and mainly plays a sealing role, the upper shell is manufactured through the plastic uptake technology, the wall thickness of the upper shell is controlled to range from 0.4 mm to 0.6 mm, and therefore the ultra-thin structure is manufactured, the weight and the thickness of the upper shell are reduced on the premise that the function of the upper shell is not affected, and the cost is reduced. Therefore, more bearing and space for containing the battery cells can be provided in the battery pack, and the energy density of the battery pack is improved.

Description

Technical Field

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

[0002] At present, new energy has been used as clean energy to replace fossil energy. Among new energy, the field of storage batteries has developed relatively well. However, the energy density of current storage batteries is not high. How to improve the energy density of storage batteries so that they can store more electric energy per unit volume is an urgent problem to be solved at present. Summary of the Utility Model

[0003] An object of the utility model is to provide a high-voltage electrical box and a battery pack, aiming to solve the technical problem of the heavy mass of the upper shell.

[0004] To achieve the above object, a solution provided by the utility model is: a high-voltage electrical box, which includes a lower shell and an upper shell; the upper shell is connected to the lower shell, and an assembly cavity for assembling electronic devices is formed between the lower shell and the upper shell. The upper shell is made by a thermoforming process, and the wall thickness of the upper shell is d millimeters, where 0.4 ≤ d ≤ 0.6.

[0005] Optionally, the high-voltage electrical box further includes an adhesive member, which is arranged between the lower shell and the upper shell to bond the lower shell and the upper shell respectively.

[0006] Optionally, the thickness of the adhesive member is D millimeters, where 2.5 ≤ D ≤ 3.5.

[0007] Optionally, the lower shell is provided with a first groove, the upper shell is provided with a second groove, and a part of the adhesive member is arranged in the first groove, and another part of the adhesive member is arranged in the second groove.

[0008] Optionally, the high-voltage electrical box has a first direction and a second direction that are perpendicular to each other, and the number of the adhesive members is multiple; in the first direction and / or the second direction, adhesive members are arranged on opposite sides of the lower shell.

[0009] Optionally, the upper shell includes an integrally formed main body portion and a connecting portion. An assembly cavity is formed between the main body portion and the lower shell, and the connecting portion is bonded to the lower shell through an adhesive member.

[0010] Optionally, the connecting portion is perpendicular to the main body portion. One side of the lower shell facing the upper shell has a top surface, and the connecting portion and the top surface are bonded through an adhesive member, and the adhesive member is arranged between the connecting portion and the top surface.

[0011] Optionally, the number of the connecting portions is four, and the four connecting portions are arranged in pairs along two mutually perpendicular directions.

[0012] Optionally, the connecting part and the main body part are parallel. The lower shell has a peripheral side surface. The connecting part and the peripheral side surface are bonded by an adhesive, and the adhesive is arranged between the connecting part and the peripheral side surface.

[0013] To achieve the above object, a solution provided by the present utility model is: a battery pack, which includes: a plurality of battery cells, electronic devices, and a high-voltage electrical box as described in any one of the above. The electronic devices are assembled in the high-voltage electrical box, and the battery cells and the electronic devices are electrically connected.

[0014] The beneficial effects of the present utility model are as follows:

[0015] In the present utility model, the lower shell serves as the base shell, mainly for carrying electronic devices, and the upper shell serves as the cover shell, mainly for sealing. The upper shell is made by thermoforming process, and the wall thickness of the upper shell is controlled between 0.4 mm and 0.6 mm, so as to form an extremely thin structure. Without affecting the function of the upper shell, the weight and thickness of the upper shell are reduced, so that there can be more load-bearing capacity and space for installing battery cells in the battery pack, thereby improving the energy density of the battery pack. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. 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 structures shown in these drawings.

[0017] Figure 1 It is a schematic assembly structure diagram of the high-voltage electrical box provided by the embodiment of the present utility model;

[0018] Figure 2 It is a schematic exploded structure diagram of the high-voltage electrical box provided by the embodiment of the present utility model;

[0019] Figure 3 It is a schematic cross-sectional structure diagram of an embodiment of the high-voltage electrical box provided by the embodiment of the present utility model;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of another embodiment of the high-voltage electrical box provided by the embodiment of the present utility model.

[0021] Explanation of the reference numerals in the drawings: High-voltage electrical box 10, assembly cavity 101, lower shell 12, first groove 121, top surface 123, peripheral side surface 125, upper shell 14, second groove 141, main body part 143, connecting part 145, adhesive 16. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. 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.

[0023] Please refer to Figures 1 to 3 as shown in Figure 1 which is a schematic assembly structure diagram of the high-voltage electrical box 10 provided by the embodiment of the present utility model, Figure 2 which is a schematic exploded structure diagram of the high-voltage electrical box 10 provided by the embodiment of the present utility model, Figure 3 which is a schematic cross-sectional structure diagram of an embodiment of the high-voltage electrical box 10 provided by the embodiment of the present utility model.

[0024] The embodiment of the present utility model provides a battery pack, which includes a plurality of battery cells, electronic devices, and a high-voltage electrical box 10. The electronic devices are assembled in the high-voltage electrical box 10, and the battery cells and the electronic devices are electrically connected. The electronic devices can be electronic control devices, electronic detection devices, etc. The battery cells can be lithium batteries, sodium batteries, lead-acid batteries, etc. The battery cells, as energy storage and energy release components, can store and release electrical energy repeatedly. The battery cells can be cylindrical, square, or strip-shaped.

[0025] The high-voltage electrical box 10 includes a lower case 12 and an upper case 14. The upper case 14 is connected to the lower case 12, and an assembly cavity 101 for assembling electronic devices is formed between the lower case 12 and the upper case 14. The upper case 14 is made by the thermoforming process, and the wall thickness of the upper case 14 is d millimeters, where 0.4 ≤ d ≤ 0.6, such as 0.4, 0.45, 0.5, 0.55, 0.6, etc.

[0026] The lower case 12, as the base case, is mainly used to carry electronic devices, so it has relatively high requirements for structural strength. The lower case 12 can be made by the injection molding process or by a milling machine. The upper case 14, as the cover case, mainly plays a sealing role, so it has relatively low requirements for structural strength. The upper case 14 is made by the thermoforming process.

[0027] The thermoforming process is a plastic processing process. The main principle is to heat and soften a flat plastic sheet material and then vacuum adsorb it on the surface of the mold and form it after cooling. The main advantages of the thermoforming process are saving raw and auxiliary materials, light weight, convenient transportation, good sealing performance, meeting the requirements of environmental protection and green packaging, and being suitable for mechanization, facilitating modern management, saving manpower, and improving efficiency.

[0028] In this embodiment, the lower shell 12 serves as the base shell, mainly used to carry electronic devices, and the upper shell 14 serves as the cover shell, mainly playing a sealing role. The upper shell 14 is manufactured by the thermoforming process, and the wall thickness of the upper shell 14 is controlled between 0.4 mm and 0.6 mm, so as to form an extremely thin structure, reducing the weight and thickness of the upper shell 14 without affecting its function, so that there is more load-bearing capacity and space for installing battery cells in the battery pack, thereby improving the energy density of the battery pack.

[0029] Compared with the upper shell of the high-voltage box formed by the injection molding process, the injection molding method has the following defects: 1. The upper shell is formed by the injection molding process, and the cost is relatively high; 2. The injection molding process has certain requirements for the thickness of the upper shell and cannot achieve an extremely thin form; 3. The injection-molded upper shell will increase a certain weight.

[0030] The material of the upper shell 14 can be polycarbonate (PC). The upper shell 14 made of this material is resistant to high temperature and electric shock. The material of the upper shell 14 can also be polyvinyl chloride (PVC), polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), etc.

[0031] The high-voltage electrical box 10 further includes an adhesive 16. The adhesive 16 is disposed between the lower shell 12 and the upper shell 14 to bond the lower shell 12 and the upper shell 14 respectively. Both the side of the adhesive 16 facing the upper shell 14 and the side facing the lower shell 12 have adhesiveness. When the lower shell 12 contacts the adhesive 16, the lower shell 12 and the adhesive 16 are bonded together. When the upper shell 14 contacts the adhesive 16, the upper shell 14 and the adhesive 16 are bonded together. The adhesive 16 can be glue, which bonds the upper shell 14 and the lower shell 12 together after solidification, such as composite glue, AB glue, etc. The adhesive 16 can also be a double-sided adhesive sticker for carrying objects.

[0032] To enable those skilled in the art to have a further understanding of this solution, the following will specifically explain the assembly process of the high-voltage electrical box 10. However, it should be noted that it does not impose any limitation on the technical solution of the present invention. The assembly process of the high-voltage electrical box 10 is specifically as follows:

[0033] (1). Assemble the electronic devices in the lower shell 12; (2). Bond the adhesive 16 to the lower shell 12; (3). Bond the upper shell 14 and the adhesive 16 together, and the upper shell 14 and the lower shell 12 are sealed to form an assembly cavity 101.

[0034] During the assembly process of the above-mentioned high-voltage electrical box 10, if the adhesive layer of the adhesive part 16 has a release paper, a step of tearing off the release paper needs to be added.

[0035] In this embodiment, the upper shell 14 and the lower shell 12 are bonded together through the adhesive part 16. Compared with bolt connection, the bonding connection is convenient and fast, which can shorten the assembly working hours of the production line and reduce the assembly cost; compared with snap connection, the design of the bonding connection is more simplified, reducing the design difficulty and the mold opening cost. In addition, in the bonding connection method, the adhesive part 16 can well fill the gap between the upper shell 14 and the lower shell 12, thus playing a sealing role.

[0036] The thickness of the adhesive part 16 is D millimeters, where 2.5 ≤ D ≤ 3.5, such as 2.5, 2.8, 3.0, 3.2, 3.5, etc. The bonding strength of the adhesive part 16 within this thickness range is the most reliable.

[0037] The lower shell 12 is provided with a first groove 121, and the upper shell 14 is provided with a second groove 141. A part of the adhesive part 16 is arranged in the first groove 121, and another part of the adhesive part 16 is arranged in the second groove 141. The first groove 121 and the second groove 141 cooperate with the adhesive part 16 respectively to play a role in limiting the adhesive part 16. In addition, the adhesive part 16 can respectively cooperate with the first groove 121 and the second groove 141 to reversely limit the lower shell 12 and the upper shell 14 respectively, ensuring that the upper shell 14 and the lower shell 12 are aligned to a preset position. The shape of the first groove 121 can be the same as or similar to the shape of the adhesive part 16; the shape of the second groove 141 can be the same as or similar to the shape of the adhesive part 16. For example, the shape of the adhesive part 16 is square, the shape of the first groove 121 is square, and the shape of the second groove 141 is square.

[0038] The number of the adhesive parts 16 is multiple, and the adhesive parts 16 are arranged on the opposite sides of the lower shell 12.

[0039] Specifically, the high-voltage electrical box 10 has a first direction and a second direction that are perpendicular to each other. The first direction can be the length direction of the high-voltage electrical box 10, and the second direction can be the width direction of the high-voltage electrical box 10. The number of the adhesive parts 16 is multiple; in the first direction and / or the second direction, the adhesive parts 16 are arranged on the opposite sides of the lower shell 12. The adhesive parts 16 are symmetrically arranged, so that the stress of the lower shell 12 and the upper shell 14 in a single direction is balanced, and it is not easy for the upper shell 14 and the lower shell 12 to fall off and separate from each other.

[0040] In one case, the adhesive parts 16 are arranged on the opposite sides of the lower shell 12 in the first direction, and the upper shell 14 is adhesively connected to the lower shell 12 through the adhesive parts 16 in the first direction.

[0041] In another case, the bonding members 16 are disposed on opposite sides of the lower housing 12 in the second direction, and the upper housing 14 is adhesively connected to the lower housing 12 through the bonding members 16 in the second direction.

[0042] In one case, the bonding members 16 are disposed on opposite sides of the lower housing 12 in the first direction, and the bonding members 16 are disposed on opposite sides of the lower housing 12 in the second direction. The upper housing 14 is adhesively connected to the lower housing 12 through the bonding members 16 in the first direction and the second direction respectively.

[0043] In the embodiment shown in the drawings, the upper housing 14 is provided with bonding members 16 in both the first direction and the second direction.

[0044] The upper housing 14 includes a main body portion 143 and a connecting portion 145 of an integral structure. The connecting portion 145 is located at the outer peripheral edge of the main body portion 143. An assembly cavity 101 is formed between the main body portion 143 and the lower housing 12. The connecting portion 145 is adhesively bonded to the lower housing 12 through the bonding member 16. The main body portion 143 and the connecting portion 145 are integrally formed by a thermoforming process without being connected to each other through other connecting structures, thereby simplifying the assembly process and manufacturing cost.

[0045] As Figure 3 shown, in one embodiment, the connecting portion 145 is bent relative to the main body portion 143. One side of the lower housing 12 facing the upper housing 14 has a top end surface 123. The connecting portion 145 and the top end surface 123 are adhesively bonded through the bonding member 16. The bonding member 16 is disposed between the connecting portion 145 and the top end surface 123. The bonding member 16 and the lower housing 12 are stacked in the gravity direction. The upper housing 14 is connected to the lower housing 12 in the gravity direction. The lower housing 12 provides a supporting force for the upper housing 14, thereby improving the stability of the upper housing 14. The first groove 121 can be disposed on the top end surface 123.

[0046] As Figure 4 shown, in another embodiment, the connecting portion 145 is parallel to the main body portion 143, that is, the connecting portion 145 is not bent relative to the main body portion 143. The lower housing 12 has a peripheral side surface 125. The peripheral side surface 125 is a surface in the length direction or the width direction of the lower housing 12. The connecting portion 145 and the peripheral side surface 125 are adhesively bonded through the bonding member 16. The bonding member 16 is disposed between the connecting portion 145 and the peripheral side surface 125. In this embodiment compared with the previous embodiment, the connecting portion 145 does not occupy the space in the width direction and the length direction of the main body portion 143. Therefore, the main body portion 143 can be made larger, and the assembly cavity 101 formed between the main body portion 143 and the lower housing 12 can be made larger, so as to more conveniently place electronic devices.

[0047] Furthermore, the number of the connecting portions 145 is four, and the four connecting portions 145 are arranged in pairs in two mutually perpendicular directions.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0049] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element present at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or it can also be indirectly connected to the other element through an intermediate element.

[0050] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0051] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made by using the specification and drawings of the present utility model under the inventive concept of the present utility model, or direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A high voltage electrical box, characterized in that: include: lower shell; as well as The upper shell is connected to the lower shell, and an assembly cavity for assembling electronic devices is formed between the lower shell and the upper shell. The upper shell is made by the vacuum forming process, and the wall thickness of the upper shell is d millimeters, 0.4≤d≤0.

6.

2. The high voltage electrical equipment box according to claim 1, characterized in that: The high-voltage electrical appliance box further comprises an adhesive member, which is arranged between the lower shell and the upper shell to respectively adhere the lower shell and the upper shell.

3. The high voltage electrical equipment box according to claim 2, characterized in that: The thickness of the adhesive is D mm, 2.5≤D≤3.

5.

4. The high voltage electrical equipment box according to claim 2, characterized in that: The lower shell is provided with a first groove, the upper shell is provided with a second groove, a part of the adhesive is provided in the first groove, and another part of the adhesive is provided in the second groove.

5. The high voltage electrical equipment box according to claim 2, characterized in that: There are multiple adhesive components, and the adhesive components are arranged on two opposite sides of the lower shell.

6. The high voltage electrical equipment box according to claim 2, characterized in that: The upper shell includes a main body and a connecting part of an integral structure. The connecting part is located at the peripheral edge of the main body. The assembly cavity is formed between the main body and the lower shell. The connecting part is bonded to the lower shell through the adhesive.

7. The high voltage electrical equipment box according to claim 6, characterized in that: The lower shell has a top end surface on a side facing the upper shell, the connecting portion and the top end surface are bonded by the adhesive, and the adhesive is arranged between the connecting portion and the top end surface.

8. The high voltage electrical equipment box according to claim 7, characterized in that: The number of the connecting parts is four, and the four connecting parts are arranged in pairs along two directions perpendicular to each other.

9. The high voltage electrical equipment box according to claim 6, characterized in that: The connecting portion is parallel to the main body portion, the lower shell has a peripheral side surface, the connecting portion and the peripheral side surface are bonded by the adhesive, and the adhesive is arranged between the connecting portion and the peripheral side surface.

10. A battery pack, characterized in that: The battery pack comprises: a plurality of battery cells, an electronic device and a high-voltage electrical box as claimed in any one of claims 1 to 9, wherein the electronic device is assembled in the high-voltage electrical box, and the battery cells and the electronic device are electrically connected.

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