Battery box and battery pack

Abstract

The utility model discloses a battery box which comprises a lower box body, the lower box body comprises a bottom plate and four side plates, and the four side plates and the bottom plate are arranged in a split mode; the bottom plate is provided with a mounting position for mounting the battery module; a ventilation opening is formed in at least one side plate; the upper cover is provided with a heat dissipation module; after the battery module is arranged at the mounting position, the four side plates surround the periphery of the bottom plate so as to form an accommodating space among the four side plates, the battery module is positioned in the accommodating space, and the upper cover covers the tops of the side plates so as to seal the top of the accommodating space; the battery pack comprises a battery box and a battery module, and the battery module is arranged at the mounting position; through the split arrangement of the bottom plate and the side plates of the lower box body, the side plates and the bottom plate can be mounted after the battery module is mounted to the mounting position of the bottom plate, the battery module is not blocked by the side plates during mounting, the battery module does not need to be excessively carried, the working intensity is reduced, and the product yield is improved; the heat dissipation effect of the battery box is enhanced through double heat dissipation of the ventilation openings and the heat dissipation modules.

Description

Technical Field

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

[0002] With the development of the battery industry, in existing battery packs, the battery box usually includes a lower box body and an upper cover, and the lower box body has all the side panels and the bottom plate as a whole. After the battery module is installed in the lower box body, the upper cover is closed on the lower box body.

[0003] Therefore, when assembling the battery module, it is usually necessary to move the battery module and then assemble it with the lower box. This method can easily cause the battery module to be misaligned and the employee's operating intensity is too high, which makes it difficult to improve the product yield. Utility Model Content

[0004] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a battery box and a battery pack. By separating the bottom plate and the side plate of the lower box body, the battery module can be installed to the installation position of the bottom plate, and then the side plate and the bottom plate can be installed. In this way, there is no obstruction of the side plate when the battery module is installed, and there is no need to carry the battery module too much, which reduces the work intensity and improves the yield of the product. At the same time, the dual heat dissipation of the vents and the heat dissipation module enhances the heat dissipation effect of the battery box.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A battery box, comprising:

[0007] The lower box body comprises a bottom plate and four side plates, wherein the four side plates are separately arranged from the bottom plate;

[0008] The bottom plate is provided with a mounting position identical to that for the battery module;

[0009] At least one of the side panels is provided with a vent;

[0010] An upper cover, which is provided with a heat dissipation module;

[0011] After the battery module is set at the installation position, the four side panels are surrounded by the base plate to form a storage space between the four. The battery module is located in the storage space. The upper cover is set relative to the base plate to cover the top of the side panels to close the top of the storage space.

[0012] Furthermore, limiting blocks are arranged at two opposite ends of the bottom plate, and the installation position is formed between the two limiting blocks.

[0013] Furthermore, the heat dissipation module includes a heat conducting member, a heat sink and a mounting seat;

[0014] The mounting seat is arranged on the upper cover, the heat conducting member is arranged on one side of the mounting seat, and the heat sink is arranged on the other side of the mounting seat relative to the heat conducting member;

[0015] After the upper cover is covered on the top of the side plate, the heat conducting member is located in the accommodating space, and the heat sink is located outside the accommodating space.

[0016] Furthermore, the heat dissipation module also includes a heat conducting member;

[0017] The upper cover is provided with a second mounting opening, the mounting seat is arranged in the second mounting opening, and the heat sink and the mounting seat are both arranged on the mounting seat.

[0018] Furthermore, the heat conducting member is a heat conducting sheet or a heat conducting pipe.

[0019] Furthermore, the mounting base is detachably connected to the heat sink.

[0020] Furthermore, a bayonet is provided on the mounting seat, and a clamping protrusion is provided on the heat sink;

[0021] The clamping protrusion is clamped on the clamping port to achieve detachable installation between the heat sink and the mounting seat.

[0022] Furthermore, the bayonet is provided with a card slot, and the card connection protrusion is provided with an anti-dropping block;

[0023] The anti-dropping block is engaged with the slot to prevent the heat sink from dropping out of the mounting seat.

[0024] Further, it also includes a gasket;

[0025] The gasket is arranged at the inner side of the limiting block to prevent the collision between the battery module and the limiting block and to fill the gap between the battery module and the limiting block.

[0026] Furthermore, the two oppositely arranged side panels are provided with the ventilation openings.

[0027] A battery pack comprises the battery box and a battery module, wherein the battery module is arranged at the installation position.

[0028] Further, it also includes a ventilation duct;

[0029] The battery module includes a plurality of battery cells arranged in sequence, and a ventilation pipe is provided between two adjacent battery cells.

[0030] In summary, the battery box and battery pack provided by the utility model have the following technical effects:

[0031] 1) Install the battery module to the installation position of the bottom plate first, and then install the side plate on the bottom plate. This avoids the interference of the side plate on the installation of the battery module, avoids the misalignment of the battery module installation, and reduces the handling workload of the battery module, thereby better improving the product yield rate. In addition, the side plate and the top cover are provided with ventilation holes and heat dissipation modules, and both structures have heat dissipation functions, thereby better improving the heat dissipation efficiency of the battery box.

[0032] 2) The heat dissipation module uses a heat conductive member to speed up the outward transfer of heat from the accommodation space, so as to transfer the heat to the heat sink more quickly, thereby enhancing the heat dissipation effect of the heat sink; in addition, the heat sink and the mounting base are detachably connected, especially by a snap-on method, which facilitates installation and disassembly between the two connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is an explosion diagram of the utility model;

[0034] Figure 2 It is a structural schematic diagram of the utility model;

[0035] Figure 3 This is the second explosion schematic diagram of the utility model;

[0036] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0037] Figure 5 This is a schematic diagram of the installation of the battery cell, end plate and ventilation pipe of the utility model;

[0038] Figure 6 It is a schematic diagram of the detachable connection between the heat sink and the mounting base of the utility model;

[0039] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0040] The meanings of the reference numerals are as follows:

[0041] 1. Lower box; 11. Bottom plate; 12. Side plate; 2. Mounting position; 3. Ventilation port; 4. Upper cover; 41. Heat dissipation module; 411. Heat conducting member; 4111. Heat conducting sheet; 4112. Heat conducting pipe; 412. Heat sink; 413. Mounting seat; 5. Limit block; 6. Clamp; 61. Card slot; 7. Card protrusion; 71. Anti-drop block; 8. Battery cell; 9. End plate; 10. Ventilation pipe; 13. Fixing protrusion; 14. Gasket. DETAILED DESCRIPTION

[0042] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0045] Embodiment 1

[0046] See also Figure 1 and Figure 2 The utility model discloses a battery box, comprising:

[0047] The lower box body 1 includes a bottom plate 11 and four side plates 12, and the four side plates 12 are separately arranged from the bottom plate 11; preferably, according to the prior art, the bottom plate 11 is a square plate of a quadrilateral; the bottom plate 11 is provided with a mounting position 2 which is the same as the battery module installation; preferably, in this embodiment, the mounting position 2 is composed of: limiting blocks 5 are provided at opposite ends of the bottom plate 11, and the mounting position 2 is formed between the two limiting blocks 5, and specifically, the limiting blocks 5 are two mouth-shaped profiles; if in this embodiment, the bottom plate 11 is a rectangular plate, the profile is provided on the long side of the bottom plate 11, and the other two side sides are short sides, so there is no enclosure at both ends where the short sides of the mounting position 2 are located.

[0048] Alternatively, a through slot with openings at both ends may be provided on the bottom plate 11 as the installation position 2 .

[0049] At least one side panel 12 is provided with a vent 3; it can be known that the vent 3 can be provided on all side panels. Specifically, a first mounting port is provided on the side panel 12, and the ventilation plate is provided on the first mounting port. In particular, a plurality of through holes are provided on the ventilation plate to form the vent 3. In addition, a filter net is also provided on the inner side of the plurality of ventilation holes to block impurities in the air; it can be known from the above that the side panels provided with the vent 3 can be one, two, three or even four.

[0050] More preferably, in this embodiment, the ventilation openings 3 are provided on the side panels 12 on both sides of the bottom panel 11 .

[0051] Furthermore, after the upper cover 4 and the battery module are set in the installation position, the four side panels 12 are surrounded by the four sides of the bottom plate 11 to form a receiving space therebetween, the battery module is located in the receiving space, and the upper cover 4 is covered on the top of the side panels 12 to close the top of the receiving space.

[0052] The upper cover 4 is provided with a heat dissipation module 41; in this embodiment, the heat dissipation module 41 at least includes a heat sink 412, and the heat sink 412 is arranged on the top of the upper cover 4, so that the heat inside the battery box can be transported outward through the upper cover 4 and the heat sink 412; more preferably, in order to better transport the heat in the battery box outward, it can be referred to that a second mounting port is provided on the upper cover 4 (in this embodiment, the second mounting port is a through hole connecting the inside and outside of the upper cover 4), so that the heat dissipation module 41 also includes a mounting seat 413, preferably, the mounting seat 413 is a mounting plate, and the mounting plate is a metal plate with good thermal conductivity, so the mounting plate can be detachably mounted on the second mounting port by bolts or the like, and the heat sink 412 is arranged on the mounting plate. In this embodiment, the number of heat sinks 412 is multiple, and multiple heat sinks 412 are arranged on the mounting plate to enhance the heat dissipation effect.

[0053] Furthermore, according to the heat dissipation requirements, the heat dissipation module 41 also includes a heat conductor 411. Specifically, the heat conductor 411 is arranged on the inner side of the mounting plate relative to the heat sink 412, that is, the heat conductor 411 is located in the accommodating cavity, and the heat sink 412 is located outside the accommodating cavity). Its function is to transfer the heat in the battery box to the heat sink 412, thereby enhancing the heat dissipation effect to a greater extent.

[0054] Preferably, see Figure 1 The heat conducting member 411 is a heat conducting sheet 4111 , and more specifically, the heat conducting sheet 4111 is a semiconductor heat conducting sheet.

[0055] For others, see Figure 3 The heat conducting member 411 is a heat conducting pipe 4112 . Specifically, the heat conducting pipe 4112 is a serpentine pipe. Cooling liquid passes through the heat conducting pipe 4112 to transfer the heat in the battery box.

[0056] In addition, when the second mounting port and the mounting seat 413 are not set, the heat conductor 411 can be directly pasted or fixed on the inner wall of the upper cover 4, and the heat conductor 411 first transfers the heat to the upper cover 4, and then transfers the heat to the heat sink 412 through the upper cover 4 to dissipate the heat outward; of course, when the second mounting port is not set, but the mounting seat 413 is set, the mounting seat 413 can be set on the outer wall of the upper cover 4. In this way, the heat transmission path to the outside is the heat conductor 411, the upper cover 4, the mounting seat 413, and the heat sink 412 in sequence.

[0057] A battery pack includes a battery box and a battery module. The battery module is arranged at an installation position 2. More specifically, the battery module includes a plurality of arranged battery cells 8. According to the prior art, each of the outer portions of the battery cells 8 near the short sides is provided with an end plate 9 to clamp the battery cells 8 and provide a pre-tightening force. According to the above, the installation process of the battery cells 8 is as follows: Figure 5 First, fix one end plate 9 on the bottom plate 11, and then place the battery cells 8 in the installation positions 2 one by one. After the battery cells 8 are placed, squeeze all the battery cells 8 through another end plate 9, and screw the other end plate 9 to the bottom plate 11 with bolts.

[0058] After the battery cells 8 and the end plates 9 are installed, the side plates 12 are installed on the sides of the bottom plate 11. Preferably, the side plates 12 are detachably connected to the bottom plate 11, and the connection method includes but is not limited to screw connection. In addition, the upper cover 4 and the side plates 12 may also adopt the above-mentioned detachable connection method.

[0059] In particular, since there is no supporting point in the middle of the side panel 12 at the short side of the bottom plate 11, a fixing protrusion 13 is provided in the middle of the short side of the bottom plate 11. In this way, the inner wall in the middle of the side panel 12 on the short side of the bottom plate 11 can abut and be connected to the fixing protrusion 13, thereby enhancing the connection strength of the side panel 12 and preventing deformation of the middle portion.

[0060] It is important that, as mentioned above, the side panels 12 on both sides of the bottom panel 11 are provided with vents 3 (that is, the vents 3 are located on one side of the small side of the battery cell 8), and the vents 3 can provide air cooling for all the battery cells 8; more importantly, the two vents 3 are arranged opposite to each other, one vent 3 serves as an air inlet and the other serves as an air outlet, so as to enhance air convection; of course, in other embodiments, vents 3 may also be provided on the other two side panels 12.

[0061] Further, see Figure 4 It can be known that there may be a gap between the above-mentioned limit blocks 5 and the battery modules, which is not conducive to the fixation of the battery modules. Therefore, a gasket 14 is provided on the inner side of the limit block 5. Preferably, the gasket 14 can be an elastic plastic, which has both a buffering and a filling effect.

[0062] Preferably, the gasket 14 can be a rectangular piece and is only arranged on the inner side of the limit block 5; of course, it can also be arranged in an L-shaped structure, with one side arranged on the inner side of the limit block 5 and the other side arranged on the top of the limit block 5, that is, it is buckled on the limit block 5, which is more conducive to the installation of the gasket 14 and is not easy to cause the gasket 14 to slip.

[0063] Embodiment 2

[0064] On the basis of implementation one, see Figure 1 and Figure 3The battery pack also includes a ventilation pipe 10; the battery module includes a plurality of battery cells 8 arranged in sequence, and a ventilation pipe 10 is provided between two adjacent battery cells 8; in this embodiment, the square battery cells 8 have ventilation pipes 10 in corresponding directions, and the two ends of the ventilation pipe 10 are respectively close to the two ventilation ports 3, which is conducive to the external wind passing through the ventilation pipe 10 through the air inlet to take away the heat in the middle of the battery cells 8.

[0065] According to the above, the ventilation duct 10 is installed alternately with the battery cell 8 in the installation position 2. Furthermore, in order to improve the installation positioning of the ventilation duct 10, in this embodiment, a positioning step is provided at the end of the ventilation duct 10, and the positioning step can be only provided at the upper or lower part of the end of the ventilation duct 10, or at both the upper and lower parts. What is important is that when the ventilation duct 10 is installed in the installation position 2, the positioning step overlaps the top of the limit block 5.

[0066] Embodiment 3

[0067] Based on the first or second embodiment, it can be known that the heat sink 412 is installed on the mounting seat 413. In this embodiment, the mounting seat 413 and the heat sink 412 are detachably connected.

[0068] See also Figure 6 and Figure 7 Preferably, a bayonet 6 is provided on the mounting seat 413, and a snap-in protrusion 7 is provided on the heat sink 412. More specifically, a bayonet 6 is provided on the top of the mounting seat 413, and a snap-in protrusion 7 is provided on the bottom of the heat sink 412; the snap-in protrusion 7 is snapped into the bayonet 6 to realize the detachable installation between the heat sink 412 and the mounting seat 413; specifically, the bayonet 6 is a U-shaped structure with a larger bottom and a smaller top, and the snap-in protrusion 7 corresponds to the bayonet 6. The snap-in protrusion 7 is pressed into the bayonet 6 from top to bottom, and the upper part of the bayonet 6 is opened. After the lower part of the snap-in protrusion 7 is snapped with the bayonet 6, the upper part of the bayonet 6 shrinks, and the wrapping limit of the snap-in protrusion 7 is completed.

[0069] Furthermore, in order to improve the reliability of the clamping connection between the bayonet 6 and the clamping protrusion 7, the bayonet 6 is provided with a clamping slot 61, and the clamping protrusion 7 is provided with an anti-slip block 71; the anti-slip block 71 is engaged with the clamping slot 61 to prevent the heat sink 412 from detaching from the mounting seat 413; in this embodiment, the two sides of the lower part of the bayonet 6 are respectively provided with clamping slots 61, and the two sides of the clamping protrusion 7 are also correspondingly provided with anti-slip blocks 71, so that the clamping balance between the two can be achieved. In particular, the two anti-slip blocks 71 are respectively arranged obliquely downward on both sides, so that the anti-slip blocks 71 are conveniently inserted into the clamping slot 61 from top to bottom; in addition, the outer end of the anti-slip block 71 is chamfered or rounded to prevent the anti-slip block 71 from colliding with the inside of the bayonet 6.

[0070] In other cases, the heat sink 412 may be directly detachably connected to the mounting base 413 by screws, which will not be listed here one by one.

[0071] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: A lower box body (1), comprising a bottom plate (11) and four side plates (12), wherein the four side plates (12) and the bottom plate (11) are separately arranged; The bottom plate (11) is provided with a mounting position (2) which is the same as that for mounting a battery module; At least one of the side panels (12) is provided with a vent (3); An upper cover (4) provided with a heat dissipation module (41); After the battery module is arranged at the installation position (2), the four side panels (12) are surrounded on all sides of the bottom panel (11) to form a storage space between the four. The battery module is located in the storage space. The upper cover (4) is arranged relative to the bottom panel (11) to cover the top of the side panels (12) to close the top of the storage space.

2. A battery box according to claim 1, characterized in that: Limiting blocks (5) are provided at two opposite ends of the bottom plate (11), and the installation position (2) is formed between the two limiting blocks (5).

3. A battery box according to claim 1, characterized in that: The heat dissipation module (41) comprises a heat conducting member (411), a heat sink (412) and a mounting seat (413); The mounting seat (413) is arranged on the upper cover (4), the heat conducting member (411) is arranged on one side of the mounting seat (413), and the heat sink (412) is arranged on the other side of the mounting seat (413) relative to the heat conducting member (411); After the upper cover (4) is covered on the top of the side plate (12), the heat conducting member (411) is located in the accommodating space, and the heat sink (412) is located outside the accommodating space.

4. A battery box according to claim 3, characterized in that: The upper cover (4) is provided with a second mounting opening, the mounting seat (413) is arranged in the second mounting opening, and the heat sink (412) and the mounting seat (413) are both arranged on the mounting seat (413).

5. A battery box according to claim 3, characterized in that: The mounting seat (413) is provided with a bayonet (6), and the heat sink (412) is provided with a bayonet protrusion (7); The snap-fit ​​protrusion (7) is snap-fitted to the snap-fit ​​port (6) to achieve detachable installation between the heat sink (412) and the mounting seat (413).

6. A battery box according to claim 5, characterized in that: The bayonet (6) is provided with a bayonet groove (61), and the bayonet protrusion (7) is provided with an anti-dropping block (71); The anti-detachment block (71) is engaged with the latching slot (61) to prevent the heat sink (412) from detaching from the mounting seat (413).

7. A battery box according to claim 2, characterized in that: Also includes a gasket (14); The gasket (14) is arranged on the inner side of the limiting block (5) to prevent collision between the battery module and the limiting block (5) and to fill the gap between the battery module and the limiting block (5).

8. A battery box according to any one of claims 1 to 7, characterized in that: The two side panels (12) arranged opposite to each other are provided with the ventilation openings (3).

9. A battery pack, characterized in that: It comprises a battery box and a battery module as claimed in any one of claims 1 to 8, wherein the battery module is arranged at the installation position (2).

10. A battery pack according to claim 9, characterized in that: Also includes a ventilation pipe (10); The battery module comprises a plurality of battery cells (8) arranged in sequence, and a ventilation pipe (10) is provided between two adjacent battery cells (8).

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