Box cover assembly, battery box and battery pack

Abstract

The utility model relates to the technical field of electric energy storage, and particularly discloses a box cover assembly, a battery box and a battery pack, the box cover assembly comprises a box cover body, and the bottom surface of the box cover body is provided with an anti-condensation block used for inhibiting water vapor from being condensed into condensed water. The box cover assembly, the battery box and the battery pack provided by the utility model can effectively solve the problem that the conventional battery pack is easy to break down due to the dripping of condensed water.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy storage, in particular to a box cover assembly, a battery box and a battery pack. Background Art

[0002] Existing battery packs typically include a box with an upward opening, electrical components located within the box, and a cover assembly located above the box and covering the opening. Specifically, the electrical components include battery modules and a battery management system (BMS).

[0003] When the battery module is operating, it generates heat. The heated air inside the box moves upward. Once it encounters the box cover assembly, which is typically made of cold metal, water vapor in the air condenses on the underside of the cover assembly. This condensed water then drips downward under the force of gravity. If this condensed water drips onto the BMS's data collection line interface, it can easily cause a short circuit in the data collection harness.

[0004] Therefore, it is necessary to improve the existing battery pack to solve the problem that it is prone to failure due to dripping of condensed water.

[0005] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0006] One purpose of the present invention is to provide a box cover assembly, a battery box and a battery pack, which can effectively solve the problem that the existing battery pack is prone to malfunction due to dripping of condensed water.

[0007] To achieve the above objectives, on the one hand, the utility model provides a box cover assembly, including a box cover body, wherein the bottom surface of the box cover body is provided with an anti-condensation block for inhibiting water vapor from condensing into condensed water.

[0008] Optionally, the anti-clotting block is fixed to the bottom of the box cover body by adhesive bonding or magnetic attraction, and protrudes downward from the bottom surface of the box cover body.

[0009] Optionally, the specific heat capacity and thermal conductivity of the anti-clotting block are lower than those of the box cover body.

[0010] Optionally, the middle position of the box cover body is raised upward to form a raised cavity with an opening facing downward, and a plurality of fastening holes for fasteners to pass through are provided at the edge position of the box cover body.

[0011] Optionally, the anti-clotting block is located at a top corner of the elevated cavity.

[0012] Optionally, each corner position of the top surface of the box cover body is provided with a downwardly concave corner recess, an upwardly protruding peripheral reinforcement portion is provided between two adjacent corner recesses, and an upwardly protruding central reinforcement portion is provided at the center position of the top surface of the box cover body;

[0013] Each of the peripheral reinforcements is connected to the central reinforcement.

[0014] Optionally, a water guide groove connected to the corresponding top corner recessed portion is provided between two adjacent peripheral reinforcement portions.

[0015] Optionally, a protective strip is provided at the edge of the box cover body.

[0016] On the other hand, a battery box is provided, comprising a box body with an upward opening, and a box cover assembly located above the box body and covering the opening of the box body.

[0017] In yet another aspect, a battery pack is provided, comprising the battery box and a BMS located in the battery box;

[0018] Wherein, the acquisition line interface of the BMS is located below the anti-clotting block.

[0019] The beneficial effects of the present invention are: providing a box cover assembly, a battery box and a battery pack, wherein an anti-clotting block is provided at a position at the bottom of the box cover body corresponding to the acquisition line interface of the BMS, so that the water vapor in the battery box is difficult to condense into condensed water on the anti-clotting block, thereby effectively preventing the condensed water from falling downward to the acquisition line interface of the BMS, causing a malfunction of the battery pack.

[0020] Therefore, the box cover assembly, battery box and battery pack provided by the present invention can effectively solve the problem that the existing battery pack is prone to malfunction due to dripping of condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the top surface of the box cover assembly provided in the embodiment;

[0023] Figure 2 A schematic diagram of the bottom surface of the box cover assembly provided in the embodiment;

[0024] Figure 3 An exploded schematic diagram of a box cover assembly provided in an embodiment.

[0025] In the picture:

[0026] 1. Box cover body; 101. Heightening cavity; 102. Flange structure; 1021. Fastening hole; 103. Top corner recess; 104. Peripheral reinforcement; 105. Center reinforcement; 106. Water guide groove; 107. Reinforcement boss;

[0027] 2. Anti-clotting;

[0028] 3. Protective layering. DETAILED DESCRIPTION

[0029] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component. When a component is considered to be "disposed on" another component, it may be directly disposed on the other component or there may be a centrally located component.

[0031] In addition, the terms "long", "short", "inside", "outside", etc. that indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientation structure, and should not be understood as a limitation of the present invention.

[0032] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0033] The utility model provides a box cover assembly, a battery box and a battery pack, which are suitable for application scenarios of protecting battery modules and BMS, etc., and can effectively solve the problem that the existing battery pack is prone to malfunction due to dripping of condensed water.

[0034] In this embodiment, the battery pack includes a battery box, a battery module located within the battery box, and a BMS located above or to the side of the battery module. The battery box includes a box body with an upward opening and a box cover assembly located above the box body and covering the opening of the box body.

[0035] See also Figure 1-Figure 3 The lid assembly includes a lid body 1 and an anti-clotting block 2 mounted on the bottom surface of the lid body 1. The anti-clotting block 2 is used to prevent water vapor from condensing into condensed water. Accordingly, the BMS data acquisition line interface is located below the anti-clotting block 2, providing protection for the interface.

[0036] The box cover assembly, battery box and battery pack provided in this embodiment are provided with an anti-coagulation block 2 above the BMS collection line interface. It is difficult for water vapor in the battery box to condense into condensed water on the anti-coagulation block 2, so it can effectively prevent the condensed water from falling down to the BMS collection line interface, causing the battery pack to malfunction.

[0037] Optionally, the anti-clotting block 2 is made of non-metallic materials such as waterproof foam, polystyrene foam (EPS), polyvinyl chloride foam (PVC) or polyurethane foam (PU), and its specific heat capacity and thermal conductivity are much lower than those of the box cover body 1 made of steel. This can prevent the anti-clotting block 2 from forming condensation water due to excessive temperature difference between the inside and outside, like the box cover body 1.

[0038] Alternatively, a hydrophobic coating such as an anti-condensation coating may be applied to the block to reduce surface moisture absorption and the formation of condensed water.

[0039] Therefore, the box cover assembly, battery box and battery pack provided by the present invention can effectively solve the problem that the existing battery pack is prone to malfunction due to dripping of condensed water.

[0040] In this embodiment, the anti-clotting block 2 protrudes downward relative to the box cover body 1. If condensed water accumulates on the bottom surface of the box cover body 1, the anti-clotting block 2 can also limit the condensed water to prevent it from flowing along the box cover body 1 to directly above the BMS, thereby preventing the condensed water from dripping onto the collection line interface of the BMS.

[0041] In this embodiment, the center of the lid body 1 is raised upward to form a downward-opening elevated cavity 101, providing space for the battery module and BMS. The edge of the lid body 1 forms a flange structure 102 and is provided with a plurality of fastening holes 1021 for fasteners (e.g., bolts or screws).

[0042] Optionally, the size of the anti-clotting block 2 is larger than that of the BMS, and one side thereof should extend beyond the edge of the BMS by 30 mm to 40 mm to prevent condensed water from gathering above the BMS.

[0043] Each top corner position of the top surface of the box cover body 1 is provided with a downwardly concave top corner recess 103, and an upwardly protruding peripheral reinforcement portion 104 is provided between two adjacent top corner recesses 103. The center position of the top surface of the box cover body 1 is provided with an upwardly protruding central reinforcement portion 105; each of the peripheral reinforcement portions 104 is connected to the central reinforcement portion 105.

[0044] Because the lid body 1 is an overall flat structure, the torsional resistance of the lid body 1 is relatively poor. Furthermore, the torsional resistance is the worst at the center of the lid body 1. In this embodiment, the lid body 1 is provided with a downwardly concave top corner recess 103 and an upwardly protruding peripheral reinforcement 104, which can effectively improve the torsional resistance of the lid body 1. Furthermore, an upwardly protruding central reinforcement 105 is provided at the center of the top surface of the lid body 1, and each of the peripheral reinforcements 104 is connected to the central reinforcement 105. This can significantly improve the torsional resistance of the lid body 1 at the center, thereby significantly enhancing the structural strength of the entire lid body 1.

[0045] Optionally, a plurality of upwardly protruding reinforcement bosses 107 are further provided at the top corner recess 103 to further enhance the structural strength of the top corner recess 103 .

[0046] Furthermore, the edge of the box cover body 1 is in the form of a flange edge structure 102, and is provided with a protective strip 3. Optionally, the protective strip 3 is made of HC340 / 590DP, which is a steel material with high strength and hardness and is not easy to deform. It can be fixed to the top of the flange edge structure 102 by pasting so as to fit more closely with the box cover.

[0047] The protective bead 3 is generally elongated, with holes punched in the same locations as the fastening holes 1021 in the flange structure 102. This prevents torque decay in the fasteners, thus preventing deformation of the flange structure 102 and poor sealing due to excessive torque in the lid assembly. This not only strengthens the connection between the lid assembly and the battery compartment, but also increases the fastener's securing torque and prevents torque decay, achieving two goals at once.

[0048] Optionally, the spacing between two adjacent fastening holes 1021 is 80mm-100mm. The distance between fastening holes 1021 should be neither too large nor too small. Excessive spacing may result in insufficient torque on the fasteners, affecting airtightness. Excessive spacing may also increase assembly time and lead to excessive design and waste. Experiments have shown that the box cover assembly provided in this embodiment can meet the IPX8 airtightness requirements.

[0049] In this embodiment, the anti-clotting block 2 does not need to cover the entire bottom of the elevated cavity 101. It only needs to be installed in the top corner of the elevated cavity 101, directly above the collection line interface. This structural design can prevent condensed water from dripping onto the collection line interface and prevent the anti-clotting block 2 from blocking a large area of ​​the box cover body 1, thereby preventing poor heat dissipation.

[0050] Optionally, the anti-clotting block 2 is fixed to the bottom of the box cover body 1 by adhesive bonding or magnetic attraction, so as to facilitate rapid adjustment of the position of the anti-clotting block 2 according to the specific position of the acquisition line interface.

[0051] In this embodiment, a water channel 106 is provided between two adjacent peripheral reinforcements 104, communicating with the corresponding corner recesses 103. When water falls onto the lid body 1, it flows along the water channel 106 into the corner recesses 103 and outward, without stagnating on the lid body 1. This prevents corrosion on the top of the lid body 1 caused by accumulated water.

[0052] In summary, the box cover assembly, battery box, and battery pack provided in this embodiment have the following advantages:

[0053] ①An anti-condensation block 2 is provided above the BMS collection line interface, which can effectively prevent condensed water from falling down to the BMS collection line interface and causing battery pack failure;

[0054] ② The top corner recess 103, the upwardly protruding peripheral reinforcement 104 and the central reinforcement 105 are provided on the box cover body 1, so that the structural strength of the entire box cover body 1 is greatly improved;

[0055] ③ A protective pressure strip 3 is provided at the edge of the box cover body 1 to prevent the flange edge structure 102 from being deformed and the airtightness of the battery box from being reduced due to excessive torque of the fasteners;

[0056] ④ The anti-clotting block 2 is only installed in the raised cavity 101 at the top corner position just above the collection line interface, which can prevent condensed water from dripping onto the collection line interface and prevent the anti-clotting block 2 from blocking a large area of ​​the box cover body 1 and causing poor heat dissipation;

[0057] ⑤ A water guide groove 106 is provided on the top of the box cover body 1 to prevent the top of the box cover body 1 from being corroded by accumulated water.

[0058] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0059] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A box cover assembly, characterized in that: The invention comprises a box cover body (1), wherein the bottom surface of the box cover body (1) is provided with an anti-condensation block (2) for inhibiting water vapor from condensing into condensed water.

2. The box cover assembly according to claim 1, characterized in that: The anti-clotting block (2) is fixed to the bottom of the box cover body (1) by adhesive bonding or magnetic attraction, and protrudes downward from the bottom surface of the box cover body (1).

3. The box cover assembly according to claim 1, characterized in that: The specific heat capacity and thermal conductivity of the anti-clotting block (2) are both lower than those of the box cover body (1).

4. The box cover assembly according to claim 1, characterized in that: The middle position of the box cover body (1) is raised upward to form a raised cavity (101) with a downward opening, and a plurality of fastening holes (1021) for fasteners to pass through are provided at the edge of the box cover body (1).

5. The box cover assembly according to claim 4, characterized in that: The anti-clotting block (2) is located at the top corner of the height-increasing cavity (101).

6. The box cover assembly according to claim 4, characterized in that: Each corner position of the top surface of the box cover body (1) is provided with a downwardly concave corner recess (103), an upwardly protruding peripheral reinforcement portion (104) is provided between two adjacent corner recesses (103), and an upwardly protruding central reinforcement portion (105) is provided at the center position of the top surface of the box cover body (1); Each of the peripheral reinforcements (104) is connected to the central reinforcement (105).

7. The box cover assembly according to claim 6, characterized in that: A water guide groove (106) connected to the corresponding top corner recessed portion (103) is provided between two adjacent peripheral reinforcement portions (104).

8. The box cover assembly according to claim 4, characterized in that: A protective pressure strip (3) is provided at the edge of the box cover body (1).

9. A battery box, characterized in that: The invention comprises a box body with an upward opening, and a box cover assembly according to any one of claims 1 to 8, which is located above the box body and covers the opening of the box body.

10. A battery pack, characterized in that: The battery box according to claim 9 and a BMS located in the battery box; The acquisition line interface of the BMS is located below the anti-coagulation block (2).

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