Battery module housing and battery module

Abstract

The utility model relates to the battery module shell and battery module in the field of battery, including casing and the shell cover of pairing installation on casing, the inside of casing is provided with the containing cavity for containing the cell subassembly, the shell cover is connected with casing through the connecting assembly and is paired, and the casing forms the protruding plug -in protruding, and the casing forms the positioning flange, the inside of shell cover is provided with the plug -in recess, and the edge of shell cover forms the positioning baffle, and the first layer sealing structure is formed to the pairing of positioning baffle and positioning flange, and the sealing recess is seted up on the plug -in protruding, and the sealing recess is filled with the sealing rubber ring for sealing, and the pairing plug -in of shell cover and casing makes the sealing rubber ring and shell cover form the second sealing structure, the utility model shell cover and the buckle structure of casing avoid the connection deviation caused by the structural misplacement during assembly, reduce the problem that the sealing effect is poor due to uneven bolt pretightening force, improve the assembly accuracy and connection stability of shell cover and casing buckle connection.

Description

Technical Field

[0001] This utility model relates to the field of batteries, specifically to a battery module housing and a battery module. Background Technology

[0002] Battery module housings are primarily used in the fields of new energy power battery technology and power electronic device protection technology. Their core function is to provide mechanical protection and environmental isolation for battery cells (such as lithium-ion batteries), ensuring stable operation of the battery module under complex operating conditions (such as vibration and shock), while also meeting electrical safety and fire / explosion protection requirements. With the global energy structure transformation and rapid development, the design of battery module housings has become a key factor affecting the energy density, safety performance, and lifespan of battery systems.

[0003] The main components of the battery module housing are as follows: Housing: As the main frame, it is usually made of aluminum alloy, high-strength steel or composite materials, which has the characteristics of lightweight and high rigidity; Cover: It cooperates with the housing to form a closed cavity; Sealing components: such as rubber sealing rings, sealant or welded structures, to ensure the protective effect of the joint surface between the housing and the cover; Connection and fixing structure: including bolts, buckles, rivets or laser welding points, used to achieve reliable connection between the housing and the cover and the installation and positioning of the module in the equipment.

[0004] However, traditional battery module housings have the following key design flaws: The connection between the existing housing and the cover typically relies on bolts. The mating structure between the cover and the housing is relatively simple. When using bolts for tightening, the bolt torque and tightening sequence must be controlled. Due to the elasticity of the sealing ring, uneven bolt preload can easily lead to uneven pressure on the sealing surfaces of the cover and the housing, affecting the bolt connection efficiency and causing loosening. This, in turn, affects the assembly efficiency and stability of the cover-to-housing fastening connection. Furthermore, traditional covers and housings lack multi-directional constraint mechanisms, affecting the stability of the cover-to-housing fastening connection. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned defects and provide a battery module housing and a battery module, so as to solve the technical problem in the background art of how to improve the assembly accuracy and stability of the housing and the casing, so as to reduce the uneven pressure on the sealing surface of the housing and the casing caused by uneven bolt preload, which affects the assembly efficiency and sealing effect.

[0006] The objective of this utility model is achieved through the following means:

[0007] The battery module housing includes a housing and a cover mounted on the housing. The housing has an internal cavity for accommodating battery cell components. The cover is connected to the housing via a connecting component, allowing it to cover and seal the opening of the cavity. The housing has a raised insertion protrusion and a positioning flange, which forms a stepped shape with the insertion protrusion. The inner side of the cover has an insertion groove for engaging with the insertion protrusion, and the edge of the cover has a positioning stop for engaging with the positioning flange. The engagement of the positioning stop and the positioning flange forms a first sealing structure. The insertion protrusion has a sealing groove filled with a sealing ring. The mating of the cover and the housing creates a second sealing structure with the sealing ring and the cover.

[0008] Furthermore, as described above, the insertion protrusion is provided with multiple positioning holes, which are distributed at the four corners of the insertion protrusion, and positioning posts that are paired and inserted into the positioning holes are formed in the insertion groove.

[0009] The precise insertion and engagement of the positioning holes and positioning pins provide initial positioning guidance during the assembly of the cover and the housing, preventing the cover from shifting due to lack of constraint and significantly improving assembly accuracy. At the same time, the positioning structure distributed at the four corners can evenly distribute assembly stress, reducing uneven pressure on the sealing surface caused by uneven bolt preload, providing a stable foundation for subsequent bolt connections, thereby improving assembly efficiency and sealing reliability.

[0010] Furthermore, as described above, the cover has multiple through mounting holes, and the insert protrusion has a fixing hole that is coaxially matched with the mounting holes, so that the connecting component passes through the mounting holes and connects with the fixing hole. The connecting component is composed of multiple bolts.

[0011] The coaxial matching design of the mounting holes and fixing holes ensures precise alignment of the holes during bolt connection, avoiding bolt installation difficulties or uneven preload caused by hole misalignment; the even distribution of multiple bolts can balance the connection force, improve the stability of the connection between the cover and the housing and the uniformity of the sealing surface pressure, thereby improving the bolt connection efficiency and assembly stability.

[0012] Furthermore, as described above, the two sides of the insertion protrusion are formed with limiting grooves that are recessed into the receiving cavity, and the inner wall of the insertion groove is formed with a limiting protrusion that is inserted and fitted with the limiting groove, so that the cover is inserted through the insertion groove and the insertion protrusion, and the limiting protrusion and the limiting groove are locked and limited.

[0013] The insertion and fitting of the limiting groove and the limiting protrusion can provide lateral mechanical constraint when the cover and the housing are assembled, further preventing the cover from sliding or shifting due to external force or vibration. This multi-directional constraint mechanism makes up for the single constraint defect of traditional bolt connection, and enhances the stability and reliability of the fastening connection between the cover and the housing.

[0014] Furthermore, as described above, the bottom wall of the insertion groove is formed with a raised limiting protrusion, and an insertion gap is formed between the outer side of the limiting protrusion and the inner wall of the insertion groove, so that the cover can be paired and held with the insertion protrusion through the insertion gap.

[0015] The fit between the limiting protrusion and the insertion gap further enhances the multi-directional constraint capability between the cover and the housing, improves the stability of the snap-fit ​​connection, and ensures precise contact of the sealing structure.

[0016] Furthermore, as described above, the outer side of the insert protrusion is mated and connected to the inner wall of the shell cover by being coated with waterproof adhesive.

[0017] The application of waterproof adhesive forms an additional sealing layer that fills the tiny gaps between the shell cover and the insert protrusion, compensating for any localized sealing deficiencies that may exist with the sealing ring. Specifically, the contact between the positioning flange and the positioning edge forms the first sealing structure, further enhancing the overall sealing performance and waterproof reliability.

[0018] Furthermore, as described above, a connecting portion is formed on the side of the housing, and a connecting hole for positioning and connection with the outside is provided on the connecting portion, and a protective plate is connected to the bottom of the housing.

[0019] The design of the connecting parts and connecting holes facilitates the precise positioning and fixation of the battery module housing to the external structure (such as the equipment frame), improving the overall installation stability; the bottom protective plate can effectively resist external collisions, scratches or foreign object impacts, protect the bottom structure of the housing and the internal battery cell components, extend the service life of the battery module and improve the safety of use.

[0020] A battery module includes a cell assembly and a battery module housing. The cell assembly consists of a plurality of cells and a support frame, and the cell assembly is housed within a cavity of the housing.

[0021] Furthermore, as described above, the battery cell assembly is electrically connected to a positive terminal and a negative terminal, which are exposed on the outer side of the housing through the receiving cavity.

[0022] The beneficial effects of this utility model are as follows: The matching design of the positioning flange on the shell and the positioning flange on the cover forms the first layer of sealing structure, which can provide initial positioning and basic sealing when the cover and the shell are connected. The sealing groove and the sealing ring on the insert protrusion are compressed and adhered to the cover when the cover and the shell are inserted together, forming the second layer of sealing structure. This second layer of sealing structure works in conjunction with the first layer of sealing structure to enhance the overall sealing effect and ensure the sealing reliability and stability of the connection between the cover and the shell. The matching and interlocking structure of the insert protrusion on the shell and the insert groove in the cover avoids connection deviation caused by structural misalignment during assembly, reduces the problem of poor sealing effect caused by uneven bolt preload, reduces the stringent control requirements on bolt torque and installation sequence during assembly, improves the assembly accuracy and connection stability of the connection between the cover and the shell, and enhances assembly efficiency and sealing stability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first orientation of the battery module housing in this embodiment;

[0024] Figure 2 This is a schematic diagram of the second-direction structure of the battery module housing in this embodiment;

[0025] Figure 3 This is a schematic diagram of the exploded structure of the battery module casing in this embodiment;

[0026] Figure 4 This is a schematic diagram of the shell cover in this embodiment;

[0027] Figure 5 This is a schematic diagram of the shell structure in this embodiment;

[0028] Figure 6 This is a schematic diagram of the overall structure of the battery module in this embodiment;

[0029] Figure 7 This is a cross-sectional view of the battery module in this embodiment;

[0030] The reference numerals in the figure are as follows:

[0031] 100-Shell, 101-Receiving cavity, 102-Insertion protrusion, 103-Positioning flange, 104-Sealing groove, 105-Positioning hole, 106-Fixing hole, 107-Limiting groove, 108-Connecting part, 109-Connecting hole, 200-Shell cover, 201-Insertion groove, 202-Positioning flange, 203-Positioning post, 204-Mounting hole, 205-Limiting protrusion, 206-Limiting protrusion, 300-Sealing ring, 400-Bolt, 500-Protective plate, 600-Cell assembly, 601-Cell, 602-Bracket, 700-Positive terminal connector, 800-Negative terminal connector. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] In this embodiment, refer to Figures 1-7 The battery module housing, specifically implemented therein, includes a housing 100 and a cover 200 mating and mounted on the housing 100. The housing 100 has an internal cavity 101 for accommodating a battery cell assembly 600. The cover 200 is mated and connected to the housing 100 via a connecting assembly, allowing the cover 200 to cover and seal the opening of the cavity 101. The housing 100 has a raised insertion protrusion 102 and a positioning flange 103, which forms a stepped shape with the insertion protrusion 102. The inner side of the cover 200 is provided with a insertion groove 201 for mating and engaging with the insertion protrusion 102, and the edge of the cover 200 is formed with a positioning stop 202 for mating with the positioning flange 103. The mating of the positioning stop 202 and the positioning flange 103 forms a first sealing structure. The insertion protrusion 102 is provided with a sealing groove 104, and the sealing groove 104 is filled with a sealing ring 300 for sealing. The mating insertion of the cover 200 and the housing 100 forms a second sealing structure with the sealing ring 300 and the cover 200.

[0034] The insertion protrusion 102 is provided with positioning holes 105, which are distributed at the four corners of the insertion protrusion 102. Positioning posts 203 are formed in the insertion groove 201 to be paired and inserted with the positioning holes 105.

[0035] The precise insertion and engagement of the positioning hole 105 and the positioning post 203 provides initial positioning guidance during the assembly of the cover 200 and the housing 100, preventing the cover 200 from shifting due to lack of constraint and significantly improving assembly accuracy. At the same time, the positioning structure distributed at the four corners can evenly distribute assembly stress, reducing the problem of uneven pressure on the sealing surface caused by uneven preload of bolts 400, providing a stable foundation for subsequent bolt 400 connection, thereby improving assembly efficiency and sealing reliability.

[0036] The cover 200 has a through mounting hole 204, and the insert protrusion 102 has a fixing hole 106 that is coaxially matched with the mounting hole 204, so that the connecting component passes through the mounting hole 204 and connects with the fixing hole 106. The connecting component is composed of multiple bolts 400.

[0037] The coaxial pairing design of mounting hole 204 and fixing hole 106 ensures precise alignment of the hole positions when the bolt 400 is connected, avoiding difficulties in bolt 400 installation or uneven preload due to hole position misalignment; the uniform distribution of bolt 400 can balance the connection force, improve the stability of the connection between cover 200 and housing 100 and the uniformity of sealing surface pressure, thereby improving the bolt 400 connection efficiency and assembly stability.

[0038] The two sides of the insertion protrusion 102 are formed with limiting grooves 107 that are recessed into the receiving cavity 101. The inner wall of the insertion groove 201 is formed with limiting protrusions 205 that are inserted and fitted with the limiting groove 107. The cover 200 is inserted into the insertion groove 201 and the insertion protrusion 102, so that the limiting protrusions 205 and the limiting groove 107 are locked and limited.

[0039] The insertion and engagement of the limiting groove 107 and the limiting protrusion 205 can provide lateral mechanical constraint when the cover 200 and the housing 100 are assembled, further preventing the cover 200 from sliding or shifting due to external force or vibration. This multi-directional constraint mechanism makes up for the single constraint defect of the traditional connection that relies solely on bolts 400, and enhances the stability and reliability of the snap-fit ​​connection between the cover 200 and the housing 100.

[0040] The bottom wall of the insertion groove 201 has a raised limiting protrusion 206. An insertion gap is formed between the outer side of the limiting protrusion 206 and the inner wall of the insertion groove 201, allowing the cover 200 to engage with the insertion protrusion 102 through the insertion gap. The cooperation between the limiting protrusion 206 and the insertion gap further strengthens the multi-directional constraint capability between the cover 200 and the housing 100, improves the stability of the snap-fit ​​connection, and ensures precise contact of the sealing structure.

[0041] The outer surface of the insert protrusion 102 is mated and connected to the inner wall of the cover 200 by applying a waterproof adhesive. The application of the waterproof adhesive forms an additional sealing layer, which can fill the tiny gap between the cover 200 and the insert protrusion 102, and make up for any possible local sealing deficiencies of the sealing ring 300. Specifically, the contact between the positioning flange 202 and the positioning flange 103 forms the first sealing structure, further improving the overall sealing performance and waterproof reliability.

[0042] The housing 100 has a connecting portion 108 on its side, and a connecting hole 109 for external connection and positioning is provided on the connecting portion 108. A protective plate 500 is connected to the bottom of the housing 100. The design of the connecting portion 108 and the connecting hole 109 facilitates the precise positioning and fixation of the battery module housing to the external structure (such as the equipment frame), improving the overall installation stability. The bottom protective plate 500 can effectively resist external collisions, scratches, or impacts from foreign objects, protecting the bottom structure of the housing 100 and the internal battery cell assembly 600, extending the service life of the battery module and improving the safety of use.

[0043] The battery module includes a cell assembly 600 and a battery module housing. The cell assembly 600 is composed of individual cells 601 and a support 602, and the cell assembly 600 is housed in the receiving cavity 101 of the housing 100.

[0044] The battery cell assembly 600 is electrically connected to a positive terminal 700 and a negative terminal 800, which are exposed on the outer side of the housing 100 through the receiving cavity 101.

[0045] The specific operating principle in this embodiment is as follows:

[0046] The sealing ring 300 is installed in the sealing groove 104. The cover 200 is inserted and paired with the insertion protrusion 102 of the housing 100 through the insertion groove 201. Pressure is applied to the cover 200 to fasten it with the housing 100. The positioning flange 202 is locked in contact with the positioning flange 103. At the same time, the positioning pin 203 on the inner wall of the cover 200 passes through the positioning hole 105 of the insertion protrusion 102. There are four positioning pins 203 and positioning holes 105, which are paired and distributed at the four corners of the cover 200 and the housing 100 to ensure the stability of the insertion connection between the cover 200 and the housing 100. This facilitates the fixing connection by bolts 400 passing through the mounting hole 204 and fixing hole 106, so that the cover 200 and the housing 100 can be locked by bolts 400 diagonally.

[0047] The matching design of the positioning flange 103 on the housing 100 and the positioning flange 202 on the housing cover 200 forms the first sealing structure, which can provide initial positioning and basic sealing when the housing cover 200 is connected to the housing 100. The sealing groove 104 and the filling sealing ring 300 on the insertion protrusion 102 fit the housing cover 200 when the housing cover 200 is inserted into the housing 100, forming the second sealing structure. This works in conjunction with the first sealing structure to enhance the overall sealing effect and ensure the sealing reliability and stability of the connection between the housing cover 200 and the housing 100.

[0048] The insertion and assembly of the insertion groove 201 and the insertion protrusion 102, as well as the pairing and holding of the limiting protrusion 205 and the limiting groove 107, ensure the stability and reliability of the insertion of the cover 200 and the housing 100. At the same time, the precise insertion and engagement of the positioning hole 105 and the positioning post 203 can provide positioning guidance during the assembly of the cover 200 and the housing 100, preventing the cover 200 from shifting due to lack of constraint, and significantly improving assembly accuracy. Meanwhile, the positioning structure distributed at the four corners and the holding of the limiting protrusion 205 and the limiting groove 107 can evenly distribute the assembly stress, reduce the problem of uneven pressure on the sealing surface caused by uneven preload of the bolts 400, provide a stable foundation for the subsequent bolt 400 connection, thereby improving assembly efficiency and sealing reliability.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A battery module housing, comprising a housing and a cover mating and mounted on the housing, characterized in that: The housing has an internal cavity for accommodating the battery cell assembly. The housing cover is connected to the housing via a connecting assembly, allowing the housing cover to cover and seal the opening of the cavity. The housing has a raised insertion protrusion and a positioning flange, which forms a stepped shape with the insertion protrusion. The inner side of the housing cover has an insertion groove for mating and engaging with the insertion protrusion, and the edge of the housing cover has a positioning stop for mating with the positioning flange. The mating of the positioning stop and the positioning flange forms a first sealing structure. The insertion protrusion has a sealing groove filled with a sealing ring. The mating insertion of the housing cover and the housing forms a second sealing structure with the sealing ring and the housing cover.

2. The battery module housing according to claim 1, characterized in that: The insertion protrusion has multiple positioning holes distributed at the four corners of the insertion protrusion, and positioning posts that are paired and inserted into the positioning holes are formed in the insertion groove.

3. The battery module housing according to claim 1, characterized in that: The cover has multiple through mounting holes, and the insert protrusion has a fixing hole that is coaxially matched with the mounting holes, so that the connecting component passes through the mounting holes and connects with the fixing hole. The connecting component is composed of multiple bolts.

4. The battery module housing according to claim 1, characterized in that: The two sides of the insertion protrusion are formed with limiting grooves that are recessed into the receiving cavity. The inner wall of the insertion groove is formed with a limiting protrusion that is inserted and matched with the limiting groove, so that the cover is inserted through the insertion groove and the insertion protrusion, and the limiting protrusion and the limiting groove are locked and limited.

5. The battery module housing according to claim 4, characterized in that: The bottom wall of the insertion groove has a raised limiting protrusion, and an insertion gap is formed between the outer side of the limiting protrusion and the inner wall of the insertion groove, so that the cover can be matched and held with the insertion protrusion through the insertion gap.

6. The battery module housing according to claim 5, characterized in that: The outer side of the insert protrusion is mated and connected to the inner wall of the shell cover by being coated with waterproof adhesive.

7. The battery module housing according to any one of claims 1-5, characterized in that: The side of the housing has a connecting part, and the connecting part has a connecting hole for positioning and connection with the outside. A protective plate is connected to the bottom of the housing.

8. A battery module, characterized in that: The battery module includes a cell assembly and a battery module housing as described in any one of claims 1-7, wherein the cell assembly is composed of a plurality of cells and a support, and the cell assembly is housed within the housing cavity.

9. The battery module according to claim 8, characterized in that: The battery cell assembly is electrically connected to a positive terminal and a negative terminal, which are exposed on the outer side of the housing through the receiving cavity.

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