Battery module and electrically driven vehicle

Abstract

The utility model relates to the technical field of energy storage devices, and discloses a battery module and an electrically driven vehicle, the battery module comprises an upper cover and a lower shell, the lower shell is provided with a shell opening used for installing a battery cell, and a first annular step is formed around the shell opening; the upper cover is provided with a second annular step used for being pressed on the first annular step in a sealed mode, and the second annular step and a top plate part of the upper cover define a containing cavity with an opening facing the shell opening. The first annular step part is provided with a first annular vertical plate part and a first horizontal plate part, wherein the first annular vertical plate part upwards extends into the containing cavity, the first horizontal plate part is connected with the first annular vertical plate part so as to support the second annular step, and the first annular step and the second annular step are connected in a sealed mode. According to the battery module and the electrically-driven vehicle, the possibility that external moisture enters the battery module can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of energy storage device technology, and in particular to a battery module and an electric drive vehicle. Background Technology

[0002] A battery module is an energy storage component composed of multiple battery cells connected in series, parallel, or series-parallel configurations. Battery modules are widely used in electric vehicles, energy storage systems, and portable electronic devices.

[0003] Existing battery modules typically consist of an upper cover and a lower shell. The upper cover is press-fitted onto the lower shell, and an annular sealing ring is installed between the two to maintain a seal. However, for electric vehicles, such as golf carts, when operating in rain or humid environments for extended periods, moisture can easily seep slowly along the surface of the annular sealing ring into the inner cavities of the upper cover and lower shell, thus affecting the safety of the battery module.

[0004] Therefore, it is necessary to design a battery module and an electric drive vehicle that can reduce the possibility of external moisture entering the battery module.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a battery module and an electric drive vehicle that can reduce the possibility of external moisture entering the battery module.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A battery module includes an upper cover and a lower shell, the lower shell having an opening for inserting a battery cell and forming a first annular step around the opening; the upper cover having a second annular step for sealingly pressing against the first annular step, the second annular step and the top plate of the upper cover forming a receiving cavity with an opening facing the opening;

[0009] The first annular step portion has a first annular vertical plate portion extending upward into the receiving cavity and a first horizontal plate portion connecting the first annular vertical plate portion to support the second annular step portion, and the first annular step portion and the second annular step portion are sealed together.

[0010] Optionally, the battery module also includes fastening screws and sealing blocks;

[0011] The second annular step includes a second horizontal plate portion for fitting the first horizontal plate portion and a second annular vertical plate portion for fitting the first annular vertical plate portion; the first horizontal plate portion is provided with an array of first connecting through holes, and the second horizontal plate portion is provided with second connecting through holes corresponding to the first connecting through holes;

[0012] The fastening screw passes sequentially through the second connecting through hole and the first connecting through hole and connects to the sealing block, and an elastic sealing ring is provided between the head of the fastening screw and the second horizontal plate; the sealing block seals the gap between the fastening screw and the first horizontal plate.

[0013] Optionally, the battery module also includes a Bluetooth module for connecting to the electric vehicle and a BMS control circuit board installed in the lower housing;

[0014] A placement groove is provided at one end of the lower shell, and the Bluetooth module is installed in the placement groove and electrically connected to the BMS control circuit board.

[0015] Optionally, an overcurrent copper busbar is installed on the BMS control circuit board, and the overcurrent copper busbar is electrically connected to the battery cell unit in the lower housing.

[0016] Optionally, the battery module further includes a cell unit and a limiting guide rail installed in the lower housing. Two limiting guide rails are spaced apart, and both ends of the cell unit abut against the limiting guide rails respectively.

[0017] Optionally, a recessed connecting groove is provided at the end of the lower shell, and a fixing screw mounting hole is provided between the recessed connecting groove and the bottom wall of the lower shell, and the fixing screw mounting hole does not protrude from the outer peripheral wall of the lower shell.

[0018] Optionally, two recessed connecting grooves are provided at both ends of the lower shell, and each recessed connecting groove is connected to the fixing screw mounting hole.

[0019] Optionally, an intermediate sealing ring for fitting onto the fastening screw is provided between the first horizontal plate portion and the second horizontal plate portion.

[0020] Optionally, the first annular upright plate portion is inclined, and an annular sealing strip is provided between the first annular upright plate portion and the second annular upright plate portion.

[0021] An electric vehicle includes a battery module as described in any of the preceding claims.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The battery module and electric drive vehicle provided by this utility model have a sealed connection between the upper cover and the lower shell. The lower shell has a first annular step, and the second annular step on the upper cover is pressed onto the first annular step. The first annular vertical plate of the first annular step extends into the receiving cavity, so that even after water passes through the sealed part, it cannot pass through the first annular vertical plate to enter the inner cavity of the battery module. The combined structure of the first annular step and the second annular step, together with the sealed connection of the first annular step and the second annular step, can effectively prevent external water from entering the inner cavity of the battery module.

[0024] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a top view schematic diagram of the battery module provided in an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure of the battery module;

[0028] Figure 3 yes Figure 2 Enlarged view of the battery module at position A;

[0029] Figure 4 This is an exploded view of the battery module provided in an embodiment of this utility model.

[0030] Reference numerals: 1. Top cover; 101. Placement groove; 102. Recessed connecting groove; 103. Fixing screw mounting hole; 11. Second annular step; 111. Second annular vertical plate; 112. Second horizontal plate; 2. Lower shell; 21. First annular step; 211. First annular vertical plate; 212. First horizontal plate; 3. Fastening screw; 4. Sealing block; 6. Bluetooth module; 7. BMS control circuit board; 71. Overcurrent copper busbar; 8. Battery cell unit; 9. Limiting guide rail. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Example 1

[0041] In view of the aforementioned defects in existing battery modules, the applicant, based on years of extensive practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, actively conducted research and innovation in order to create a technology that could solve the defects in the existing technology and make the battery module more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value was finally created.

[0042] Please refer to Figures 1 to 4This utility model provides a battery module, including an upper cover 1 and a lower shell 2. The lower shell 2 has a shell opening for inserting battery cells, and a first annular step 21 is formed around the shell opening. The upper cover 1 has a second annular step 11 for sealingly pressing against the first annular step 21. The second annular step 11 and the top plate of the upper cover 1 form a receiving cavity with the opening facing the shell opening. It should be noted that the receiving cavity actually constitutes part of the receiving space of the battery module for accommodating the battery cell unit 8.

[0043] The first annular step 21 has a first annular vertical plate 211 extending upward into the receiving cavity and a first horizontal plate 212 connecting the first annular vertical plate 211 to support the second annular step 11, and the first annular step 21 and the second annular step 11 are sealed together.

[0044] In this embodiment, the upper cover 1 and the lower shell 2 are sealed together. The lower shell 2 has a first annular step 21, and the second annular step 11 on the upper cover 1 is pressed onto the first annular step 21. The first annular vertical plate portion 211 of the first annular step 21 extends into the receiving cavity. That is, even if moisture passes through the sealed part between the second annular step 11 and the first annular step 21, it cannot pass through the first annular vertical plate portion 211 and enter the inner cavity of the battery module. The combined structure of the first annular step 21 and the second annular step 11, together with the sealed connection of the first annular step 21 and the second annular step 11, can effectively prevent external moisture from entering the inner cavity of the battery module.

[0045] The battery module in this embodiment is not easily infiltrated by water, even when working in the rain for an extended period of time, thus effectively improving its safety performance.

[0046] Optionally, the battery module further includes fastening screws 3 and sealing blocks 4; the second annular step 11 includes a second horizontal plate portion 112 for fitting the first horizontal plate portion 212 and a second annular vertical plate portion 111 for fitting the first annular vertical plate portion 211; the first horizontal plate portion 212 is provided with an array of first connecting through holes, and the second horizontal plate portion 112 is provided with second connecting through holes corresponding to the first connecting through holes; the fastening screws 3 pass sequentially through the second connecting through holes and the first connecting through holes and are connected to the sealing blocks 4, and an elastic sealing ring 5 is provided between the head of the fastening screws 3 and the second horizontal plate portion 112; the sealing blocks 4 seal the gap between the fastening screws 3 and the first horizontal plate portion 212.

[0047] like Figure 3 As shown, the sealing block 4 has an annular portion that seals the gap between the inner wall of the first connecting through hole and the fastening screw 3, and a raised sealing portion that connects the annular portion. The raised sealing portion is provided with a threaded sealing hole that matches the fastening screw 3, and the threaded sealing hole does not penetrate the raised sealing portion.

[0048] It should also be noted that the elasticity of the elastic sealing ring 5 applies tension to the sealing block 4 through the fastening screw 3, thereby enabling the sealing block 4 to better seal the gap between the inner wall of the first connecting through hole and the fastening screw 3, and keeping the first horizontal plate portion 212 and the second horizontal plate portion 112 in contact, thus improving the sealing effect between the upper cover 1 and the lower shell 2. Furthermore, the elastic sealing ring 5 also helps to prevent moisture from entering the inner wall of the second connecting through hole.

[0049] Optionally, the battery module also includes a Bluetooth module 6 for connecting to the electric vehicle and a BMS control circuit board 7 installed in the lower housing 2; a placement groove 101 is provided at one end of the lower housing 2, and the Bluetooth module 6 is installed in the placement groove 101 and electrically connected to the BMS control circuit board 7.

[0050] It should be noted that the Bluetooth module 6 has an external Bluetooth antenna, enabling communication with the electric vehicle and improving communication efficiency. The electric vehicle can use the Bluetooth module to control and monitor the battery module.

[0051] Optionally, an overcurrent copper busbar 71 is installed on the BMS control circuit board 7, and the overcurrent copper busbar 71 is electrically connected to the battery cell unit 8 in the lower shell 2. In this embodiment, the use of the overcurrent copper busbar 71 for overcurrent can make the internal wiring simpler, make the space more compact, improve the space utilization rate, and help reduce the overall size of the machine.

[0052] Optionally, the battery module further includes a battery cell unit 8 and a limiting guide rail 9 installed in the lower housing 2. Two limiting guide rails 9 are spaced apart, and both ends of the battery cell unit 8 abut against the limiting guide rails 9. The limiting guide rails 9 are used to guide the battery cell unit 8 to accurately enter the appropriate position and accurately position the battery cell unit 8. In this embodiment, the battery cell unit 8 is completely limited and fixed to prevent it from becoming loose.

[0053] Optionally, a recessed connecting groove 102 is provided at the end of the lower shell 2, and a fixing screw mounting hole 103 is provided between the recessed connecting groove 102 and the bottom wall of the lower shell 2, and the fixing screw mounting hole 103 does not protrude from the outer peripheral wall of the lower shell 2. In this embodiment, by providing the recessed connecting groove 102 and the fixing screw mounting hole 103, the mounting base and fixing screw will not protrude from the outer periphery of the lower shell 2, thereby preventing external devices from impacting the mounting base and fixing screw, and also helping to reduce the required installation space.

[0054] Optionally, two recessed connecting grooves 102 are provided at both ends of the lower shell 2, and each recessed connecting groove 102 is connected to a fixing screw mounting hole 103, so that the lower shell 2 is more stably fixed.

[0055] Optionally, an intermediate sealing ring for fitting onto the fastening screw 3 is provided between the first horizontal plate portion 212 and the second horizontal plate portion 112. Specifically, this prevents moisture from entering the first connecting through hole through the gap between the first horizontal plate portion 212 and the second horizontal plate portion 112, thereby improving the sealing effect.

[0056] Optionally, the first annular vertical plate portion 211 is inclined, and an annular sealing strip is provided between the first annular vertical plate portion 211 and the second annular vertical plate portion 111. The annular sealing strip is arranged around the middle of the first annular vertical plate portion 211, and the two opposite sides of the annular sealing strip abut against the first annular vertical plate portion 211 and the second annular vertical plate portion 111, respectively.

[0057] Optionally, the first annular vertical plate portion 211 and the first horizontal plate portion 212 are continuously and sealed together; the second annular vertical plate portion 111 and the second horizontal plate portion 112 are also continuously and sealed together.

[0058] Example 2

[0059] An electric vehicle includes a battery module as described in Embodiment 1. The electric vehicle can be a golf cart, electric motorcycle, electric four-wheeler, electric tricycle, new energy vehicle, or hybrid vehicle, etc.

[0060] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A battery module, comprising an upper cover (1) and a lower shell (2), characterized in that, The lower shell (2) has a shell opening for inserting a battery cell, and a first annular step (21) is formed around the shell opening; the upper cover (1) has a second annular step (11) for sealingly pressing on the first annular step (21), and the second annular step (11) and the top plate of the upper cover (1) form a receiving cavity with an opening facing the shell opening; The first annular step (21) has a first annular vertical plate (211) extending upward into the receiving cavity and a first horizontal plate (212) connecting the first annular vertical plate (211) to support the second annular step (11), and the first annular step (21) and the second annular step (11) are sealed together.

2. The battery module according to claim 1, characterized in that, It also includes fastening screws (3) and sealing blocks (4); The second annular step (11) includes a second horizontal plate portion (112) for fitting the first horizontal plate portion (212) and a second annular vertical plate portion (111) for fitting the first annular vertical plate portion (211); the first horizontal plate portion (212) is provided with an array of first connecting through holes, and the second horizontal plate portion (112) is provided with a second connecting through hole corresponding to the first connecting through hole; The fastening screw (3) passes sequentially through the second connecting through hole and the first connecting through hole and connects to the sealing block (4), and an elastic sealing ring (5) is provided between the head of the fastening screw (3) and the second horizontal plate (112); the sealing block (4) seals the gap between the fastening screw (3) and the first horizontal plate (212).

3. The battery module according to claim 1, characterized in that, It also includes a Bluetooth module (6) for connecting electric vehicles and a BMS control circuit board (7) installed in the lower housing (2). The lower shell (2) has a placement groove (101) at one end, and the Bluetooth module (6) is installed in the placement groove (101) and electrically connected to the BMS control circuit board (7).

4. The battery module according to claim 3, characterized in that, The BMS control circuit board (7) is equipped with an overcurrent copper busbar (71), which is connected to the battery cell unit (8) in the lower shell (2).

5. The battery module according to claim 1, characterized in that, It also includes a battery cell unit (8) and a limiting guide rail (9) installed in the lower shell (2). The limiting guide rail (9) is provided with two rails spaced apart, and the two ends of the battery cell unit (8) respectively abut against the limiting guide rail (9).

6. The battery module according to claim 1, characterized in that, The lower shell (2) has a recessed connecting groove (102) at its end. A fixing screw mounting hole (103) is provided between the recessed connecting groove (102) and the bottom wall of the lower shell (2), and the fixing screw mounting hole (103) does not protrude from the outer peripheral wall of the lower shell (2).

7. The battery module according to claim 6, characterized in that, The lower shell (2) has two recessed connecting grooves (102) at both ends, and each recessed connecting groove (102) is connected to the fixing screw mounting hole (103).

8. The battery module according to claim 2, characterized in that, An intermediate sealing ring for fitting onto the fastening screw (3) is provided between the first horizontal plate portion (212) and the second horizontal plate portion (112).

9. The battery module according to claim 2, characterized in that, The first annular upright plate (211) is inclined, and an annular sealing strip is provided between the first annular upright plate (211) and the second annular upright plate (111).

10. An electric-driven vehicle, characterized in that, It includes a battery module as described in any one of claims 1 to 9.

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