CN114678639A

CN114678639A - Module upper cover, battery module and battery pack

Info

Publication number: CN114678639A
Application number: CN202210333791.4A
Authority: CN
Inventors: 梁吉旺; 罗峥; 文立
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-06-28
Anticipated expiration: 2042-03-31
Also published as: CN114678639B

Abstract

The invention provides a module upper cover, a battery module and a battery pack. The module upper cover comprises a cover plate and movable covers, the cover plate is provided with at least one first exhaust hole, the movable covers are movably connected with the cover plate, the movable covers are arranged on the upper side of the cover plate, and each movable cover covers and seals the at least one first exhaust hole; the movable cover can move upwards to release the sealing of the first exhaust hole by the movable cover. This module upper cover, its movable cover can move in order to open first exhaust hole for the apron, and moreover, thereby the movable cover can also reset and seal first exhaust hole again after gas outgoing, keeps the dustproof, the waterproof effect of module upper cover.

Description

Module upper cover, battery module and battery pack

Technical Field

The invention relates to the technical field of batteries, in particular to a module upper cover, a battery module and a battery pack.

Background

A battery module generally includes a module case and a plurality of unit batteries, which are disposed inside the module case. For the battery module, when the battery module high load operation, the battery cell can exhaust gas to inside the module shell, if these high temperature gas can not in time be discharged, the battery module can be impaired, can arouse incident such as explosion even.

Outside can in time discharge battery module in order to guarantee high-temperature gas, in order to avoid the outside dust of battery module and the inside that water got into battery module simultaneously, the upper cover of the battery module of some producers can be provided with explosion-proof valve. When the battery module runs at low load, the explosion-proof valve is in a closed state, and the explosion-proof valve can prevent dust and water from entering the module; when the air pressure in the module shell is increased to a certain value, the explosion-proof valve is opened, and high-temperature gas can be discharged through the explosion-proof valve.

However, the explosion-proof valve is mostly disposable, and the valve plate of the explosion-proof valve can be broken under the action of high gas pressure; the gas in the module can be discharged from the crack of the valve plate, and the explosion-proof valve cannot be waterproof and dustproof after the crack is formed.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a module upper cover which can prevent water and dust and exhaust high-temperature gas, and after the exhaust is finished, the module upper cover can prevent water and dust.

The invention also provides a battery module with the module upper cover.

The invention also provides a battery pack with the battery module.

According to the first aspect of the invention, the module upper cover comprises: a cap plate for covering a top of the battery, the cap plate having at least one first vent hole; the movable cover is movably connected with the cover plate and arranged on the upper side of the cover plate, each movable cover covers and seals at least one first exhaust hole, and the movable cover can be pushed by gas below the movable cover to move upwards so as to remove the sealing of the first exhaust hole by the movable cover.

The module upper cover provided by the embodiment of the invention at least has the following beneficial effects: when the air pressure below the upper cover of the module is small, the movable cover can keep sealing the first exhaust hole, and water and dust outside the module shell are difficult to enter the module shell from the first exhaust hole under the blocking effect of the movable cover; when the air pressure below the upper cover of the module is higher, the air below the movable cover can push the movable cover open, the movable cover is removed from sealing the first exhaust hole, and then the air below the upper cover of the module can be exhausted through the first exhaust hole. The movable cover covers the first exhaust hole again along with the reduction of the air pressure below the upper cover of the high-temperature and high-pressure air exhaust module. The movable cover of the module upper cover can move relative to the cover plate to open the first exhaust hole, and can reset after gas is exhausted to close the first exhaust hole again, so that the dustproof and waterproof effects of the module upper cover are maintained.

According to some embodiments of the invention, the cover plate comprises a cover portion and at least one mounting portion, the first air vent is provided in the cover portion; the mounting part is connected to the top of the covering part and protrudes relative to the top of the covering part, and the mounting part is provided with a mounting hole; the movable cover comprises a baffle plate and a connecting body, the baffle plate covers the first exhaust hole, one end of the baffle plate is connected with the side part of the connecting body, and the end part of the connecting body is rotatably arranged in the mounting hole.

According to some embodiments of the invention, the baffle comprises a constricted portion and a main body portion, the main body portion and the connecting body being connected to two sides of the constricted portion respectively; along the axial direction of the connecting body, the end of the main body part is protruded relative to the contraction part, and the end of the connecting body is protruded relative to the contraction part, so that a first accommodating groove is defined by the connecting body, the main body part and the contraction part together, and a part of the mounting part is accommodated in the first accommodating groove.

According to some embodiments of the invention, the cover plate comprises a cover portion and at least one mounting portion, the first air vent being provided in the cover portion; the mounting part is connected to the top of the covering part and protrudes relative to the top of the covering part, and the mounting part is provided with a sliding groove; the movable cover comprises a baffle plate and a connecting body, the baffle plate covers the first exhaust hole, one end of the baffle plate is connected with the side portion of the connecting body, the connecting body is slidably arranged in the sliding groove, and the connecting body can slide up and down along the sliding groove.

According to some embodiments of the invention, each of the connecting bodies is connected to two of the mounting portions; for two installation parts connected with the same connecting body, one side of any installation part, facing to the other installation part, can be abutted against the baffle plate so as to block the baffle plate from moving along the axial direction of the connecting body.

According to some embodiments of the invention, the number of the movable covers is multiple, one end of each movable cover, which is used for being connected with the cover plate, is a connecting end, and one end of each movable cover, which is far away from the connecting end, is a movable end; and for two adjacent movable covers, the movable end of one movable cover is arranged adjacent to the connecting end of the other movable cover along the arrangement direction of the plurality of movable covers.

According to some embodiments of the invention, the cover plate and the movable cover are both made of an insulating material.

A battery module according to an embodiment of a second aspect of the invention includes: the module upper cover is connected to the module lower shell to cover the first accommodating cavity, and the first exhaust hole is communicated with the first accommodating cavity; the battery is provided with a plurality of, the battery hold in first holding chamber, the top of battery has explosion-proof valve, explosion-proof valve with first exhaust hole is relative.

According to some embodiments of the present invention, the battery module further comprises: the connecting pieces are arranged to be conductors and are electrically connected with the batteries so that the batteries in the battery module are connected in series or in parallel; the electrical isolation plate is insulated, the connecting piece is installed in the electrical isolation plate, the electrical isolation plate is arranged in the first accommodating cavity, the electrical isolation plate covers the top of the battery, the electrical isolation plate is provided with a second exhaust hole, the second exhaust hole is opposite to the explosion-proof valve, and the first exhaust hole is opposite to the second exhaust hole.

A battery module according to an embodiment of a third aspect of the invention includes: the box body is internally provided with a second accommodating cavity and is also provided with a third exhaust hole which is communicated with the second accommodating cavity; the battery module of the second aspect embodiment is provided with a plurality of battery modules, and the plurality of battery modules are accommodated in the second accommodating cavity.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic perspective view of an upper cover of a module according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of the upper cover of the module shown in FIG. 1;

FIG. 3 is an exploded view of the mounting portion and the baffle of the upper cover of the module shown in FIG. 2;

FIG. 4 is a perspective view of a battery according to an embodiment of the present invention;

FIG. 5 is a simplified diagram of a baffle covering a first exhaust opening in accordance with an embodiment of the present invention;

FIG. 6 is a simplified schematic illustration of the structure of FIG. 5 with the flapper uncovered for the first venting aperture;

FIG. 7 is an exploded view of the shutter and the mounting portion slidably coupled to each other in an embodiment of the present invention;

fig. 8 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 9 is an assembly view of the electrical isolation plate and the battery in the battery module according to the embodiment of the present invention;

FIG. 10 is a schematic diagram showing the relative positions of the explosion-proof valve, the first vent hole and the second vent hole;

fig. 11 is a schematic diagram (top view) illustrating a plurality of batteries connected in series in a battery module;

fig. 12 is a schematic diagram (top view) illustrating a plurality of batteries connected in parallel in a battery module;

FIG. 13 is a schematic view of a battery pack according to an embodiment of the present invention;

fig. 14 is a schematic view of the case of the battery pack for preventing the movable cover from rotating upward.

Reference numerals: 100-module upper cover, 101-cover plate, 102-removable cover, 103-first vent hole, 104-second receiving groove, 201-mounting part, 202-cover part, 301-mounting hole, 302-constriction part, 303-connector, 304-body part, 305-first receiving groove, 306-baffle, 401-battery, 402-case, 403-top cover, 404-explosion-proof valve, 405-positive pole, 406-negative pole, 407-pole, 501-module lower case, 502-first receiving cavity, 503-module housing, 701-sliding groove, 800-battery module, 801-electrical isolation plate, 901-positioning hole, 902-second vent hole, 1001-connecting piece, 1301-battery pack, 1302-box, 1303-second accommodating chamber, 1304-third exhaust hole, 1401-top plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present numbers, and larger, smaller, inner, etc. are understood as including the present numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention provides a module upper cover 100, and referring to fig. 1, the module upper cover 100 includes a cover plate 101 and a movable cover 102.

The cover plate 101 is used for covering the top of the battery 401, and referring to fig. 1 and 2, the cover plate 101 has at least one first venting hole 103 (the first venting hole 103 is configured as a through hole), the movable cover 102 is also configured with at least one, and the movable cover 102 at least covers and closes the first venting hole 103. The movable cover 102 is movably connected with the cover plate 101, and the movable cover 102 is disposed on the upper side of the cover plate 101.

For the convenience of explaining the operation principle of the module upper cover 100, the battery module 800 and the battery 401 in the battery module 800 will be briefly described. Referring to fig. 4 and 5, the battery module 800 includes a module case 503 and a plurality of batteries 401, and referring to fig. 5, the module upper cover 100 serves as a part of the module case 503, and the batteries 401 may be disposed inside the module case 503. Referring to fig. 4, a battery 401 includes a case 402, a jelly roll, an electrolyte, and a top cover 403 (jelly roll and electrolyte are not shown); casing 402 is hollow, and top cap 403 is connected at the top of casing 402, and electrolyte and core are all set up in the inside of casing 402, and the core that rolls soaks in electrolyte. The top cover 403 has an explosion-proof valve 404, and when the gas inside the case 402 is excessive, the gas inside the case 402 is discharged to the outside of the battery 401 through the explosion-proof valve 404, and then the gas is discharged to the outside of the battery module 800.

Referring to fig. 5, the movable cover 102 may cover the first exhaust hole 103 by its own weight, and accordingly, if the gas inside the module case 503 needs to be exhausted, the gas inside the module case 503 needs to overcome the gas pressure outside the module case 503 and the weight of the movable cover 102. When the battery module 800 is in a low-load operating state, the battery 401 discharges no gas, or the battery 401 discharges only a small amount of gas, and the gas pressure inside the module case 503 is small and insufficient to push open the movable cover 102. The movable cover 102 keeps the first exhaust hole 103 closed, and water and dust located outside the module case 503 are hard to enter the inside of the module case 503 from the first exhaust hole 103 by the blocking action of the movable cover 102.

When the battery module 800 is in a high-load operation state (for example, the battery 401 in the battery module 800 is being charged or discharged rapidly), the battery 401 discharges more high-temperature gas, the gas pressure inside the module housing 503 is higher, the gas inside the module housing 503 can push the movable cover 102 open, the movable cover 102 can release the first vent 103, and then the gas can be discharged to the outside of the module housing 503 through the first vent 103 (as shown in fig. 6).

As the high-temperature and high-pressure gas is discharged to the outside of the module case 503, the pressure inside the module case 503 gradually decreases; when the air pressure inside the module case 503 is reduced to a certain degree, the movable cover 102 covers the first exhaust hole 103 again.

The movable cover 102 of the module top cover 100 can move relative to the cover plate 101 to open the first venting hole 103, and can be reset after the gas is exhausted to close the first venting hole 103 again, so that the dustproof and waterproof effects of the module top cover 100 are maintained. In addition, the module upper cover 100 of the present invention realizes the sealing and exhausting functions by closing the first exhaust hole 103 with the movable cover 102 capable of moving up and down, and the module upper cover 100 has a simple structure and a low cost.

Referring to fig. 1 and 2, in some embodiments, a plurality of the movable covers 102 and the first exhaust holes 103 are provided, the number of the movable covers 102 is equal to that of the first exhaust holes 103, and each movable cover 102 is used for covering one first exhaust hole 103. Of course, the number of the movable covers 102 and the first exhaust holes 103 is not necessarily equal, the number of the movable covers 102 may be less than that of the first exhaust holes 103, and each movable cover 102 may cover a plurality of the first exhaust holes 103. For example, in some embodiments, each movable cover 102 is used to cover two first exhaust holes 103; still alternatively, in some embodiments, only one movable cover 102 is provided, and one movable cover 102 may cover all the first exhaust holes 103 at the same time. In addition, only one first exhaust hole 103 may be provided, and a plurality of movable covers 102 may be provided, where the plurality of movable covers 102 collectively cover one first exhaust hole 103; accordingly, in order to ensure airtightness, edges of adjacent movable covers 102 need to be fitted to reduce a gap between the movable covers 102.

The movable connection between the movable cover 102 and the cover plate 101 may be a rotating connection or a sliding connection.

For example, referring to fig. 2, 3, 5 and 6, in some embodiments, the cover plate 101 includes a covering portion 202 and a mounting portion 201, the movable cover 102 includes a baffle 306 and a connecting body 303, the connecting body 303 is connected to the mounting portion 201, and the movable cover 102 can rotate around an axis of the connecting body 303 (the connecting body 303 may be provided in a cylindrical shape). Referring to fig. 8, cover 202 may cover the top of battery 401; referring to fig. 2 and 3, the first exhaust hole 103 is provided on the cover portion 202, the mounting portion 201 is coupled to a top portion of the cover portion 202, and the mounting portion 201 protrudes with respect to the top portion of the cover portion 202, the mounting portion 201 having a mounting hole 301. The baffle 306 is used for covering the first exhaust hole 103, one end of the baffle 306 is connected with the side part of the connecting body 303, and the connecting body 303 is rotatably arranged in the mounting hole 301 in a penetrating way. In this arrangement, the gas to be discharged pushes the movable cover 102, specifically, the baffle 306, and causes the movable cover 102 to rotate upward.

In other embodiments, the cover plate 101 includes a covering portion 202 and a mounting portion 201 protruding from the top of the covering portion 202, and the movable cover 102 also includes a baffle 306 and a connecting portion 303 connected to one end of the baffle 306, but the connecting portion 303 is slidably disposed in the mounting portion 201. Referring to fig. 7, the mounting portion 201 has a sliding groove 701, the connection body 303 is slidably disposed in the sliding groove 701, and the connection body 303 can slide up and down along the sliding groove 701. In this arrangement, the gas to be discharged pushes the movable cover 102, specifically, the baffle 306, and moves the movable cover 102 upward as a whole.

Both the cap plate 101 and the movable cover 102 may be made of an insulating material to improve electrical safety of the battery module 800. For example, the insulating material used for manufacturing the cover plate 101 and the movable cover 102 may be specifically plastic, resin, mica, or the like. If the cover plate 101 and the movable cover 102 are both made of plastic, the baffle 306 and the connecting body 303 can be injection molded together, and the cover portion 202 and the mounting portion 201 can also be injection molded together. Of course, the connecting body 303 and the baffle 306 may also be two separate components, for example, a through hole for the connecting body 303 to pass through is provided at one end of the baffle 306, and after the movable cover 102 and the cover plate 101 are assembled, the connecting body 303 may pass through the baffle 306 and penetrate into the mounting hole 301.

In the case where the mounting portion 201 is provided with the mounting hole 301, a bottom end wall surface of the mounting hole 301 may be spaced apart from a top surface of the covering portion 202 in order to facilitate insertion of the connector 303 into the mounting hole 301. Accordingly, the connecting body 303 and the top surface of the covering portion 202 have a gap therebetween; on this basis, the end of the baffle 306 close to the connector 303 is bent towards the direction away from the covering part 202 (or the end of the baffle 306 close to the connector 303 is tilted upwards), so that the bottom surface of the baffle 306 can be well attached to the top surface of the covering part 202, and the sealing effect of the baffle 306 on the first exhaust hole 103 can be ensured.

In some embodiments, one movable cover 102 may be connected to only one mounting portion 201, that is, one connecting body 303 is inserted into only one mounting hole 301, or one connecting body 303 is disposed in only one sliding groove 701. The arrangement facilitates the detachment or installation between the connecting body 303 and the installation part 201, when the movable cover 102 needs to be detached, the user can pull the connecting body 303 away from the installation hole 301 along the axial direction of the connecting body 303, and similarly, when the movable cover 102 needs to be installed, the user can insert the connecting body 303 into the installation hole 301 along the axial direction of the connecting body 303.

In some embodiments, one movable cover 102 may be connected to two mounting portions 201, and two ends of one connecting body 303 are respectively penetrated with different mounting holes 301; alternatively, both ends of one connecting body 303 are respectively disposed in different sliding grooves 701.

Taking fig. 3 as an example, two mounting portions 201 are arranged at intervals, each mounting portion 201 has a mounting hole 301 (in fig. 3, the front mounting portion 201, the mounting hole 301 of which is arranged at the rear side of the mounting portion 201, not specifically shown), and two ends of the connecting body 303 are respectively arranged in different mounting holes 301. For two mounting parts 201 connected with the same connecting body 303, one side surface of any mounting part 201 facing the other mounting part 201 can be abutted against the baffle 306 to prevent the baffle 306 from moving along the axial direction of the connecting body 303. For example, in fig. 3, the rear surface of the front one of the mounting portions 201 can abut against the baffle 306, so as to prevent the baffle 306 from moving forward; the rear one of the mounting portions 201 has a front surface capable of abutting against the shutter 306, thereby blocking the backward movement of the shutter 306. Therefore, if one movable cover 102 is connected to two mounting portions 201, the two mounting portions 201 can jointly restrain the movement of the movable cover 102 in the axial direction of the connecting body 303; after the movable cover 102 is rotated upward and falls down for a plurality of times, the position of the movable cover 102 in the axial direction of the connecting body 303 still does not change greatly under the constraint of the two mounting portions 201, and the movable cover 102 can still accurately cover the first exhaust hole 103 and close the first exhaust hole 103. The movable cover 102 can be limited by the connection 303 and the hole wall of the mounting hole 301 when moving along the radial direction of the connection 303.

Similarly, referring to fig. 7, each mounting portion 201 has a sliding groove 701 (in fig. 3, the front mounting portion 201, the sliding groove 701 of which is disposed at the rear side of the mounting portion 201, not specifically shown), and both ends of the connecting body 303 are respectively inserted into the different sliding grooves 701. In fig. 7, the front one of the mounting portions 201 has a rear surface capable of abutting against the shutter 306, thereby blocking the forward movement of the shutter 306; the rear one of the mounting portions 201 has a front surface capable of abutting against the shutter 306, thereby blocking the backward movement of the shutter 306. After the movable cover 102 is moved upward and dropped, the movable cover 102 can still accurately cover the first exhaust hole 103.

In the case where both ends of the connection body 303 are connected to the two mounting parts 201, respectively, the mounting parts 201 may be provided to have certain elasticity in order to facilitate assembly between the connection body 303 and the mounting parts 201, for example, the mounting parts 201 are made of plastic having elasticity. When it is necessary to assemble the connecting body 303 with the mounting parts 201, a user can first break off one of the mounting parts 201 by hand to slightly increase the distance between the two mounting parts 201, and then insert the connecting body 303 between the two mounting parts 201.

In some embodiments, the movable cover 102 has a first receiving groove 305, and the first receiving groove 305 can receive a portion of the mounting portion 201. Referring to fig. 3, the baffle 306 includes a contracting portion 302 and a main body portion 304, the main body portion 304 and the connecting body 303 are both connected to the contracting portion 302, and along an axial direction of the connecting body 303 (which may correspond to a front-back direction in fig. 3), an end portion of the main body portion 304 protrudes with respect to the contracting portion 302, and an end portion of the connecting body 303 protrudes with respect to the contracting portion 302; the connecting body 303, the contracting portion 302 and the body portion 304 together define a first receiving groove 305. Referring to fig. 2 and 3, after the connecting body 303 is inserted into the mounting hole 301, a portion of the mounting portion 201 is received in the first receiving groove 305. The first receiving groove 305 can reduce the volume of the movable cover 102, and save the material required for the movable cover 102, thereby saving the cost of the module top cover 100.

In the above-mentioned embodiment, the movable cover 102 is mainly covered on the first exhaust hole 103 by its own weight. In the module upper cover 100 in which the movable cover 102 is rotatably connected to the cover plate 101, if the rotation range of the movable cover 102 is not restricted, the movable cover 102 may be pushed open by the gas to be discharged to an angle at which the movable cover 102 cannot be returned by its own weight. To ensure that the movable cover 102 can be reset, the rotation range of the movable cover 102 may be restricted. For example, referring to fig. 13, in some embodiments, a battery pack 1301 includes a plurality of battery modules 800, the battery pack 1301 includes a case 1302, and the plurality of battery modules 800 are each accommodated in the case 1302; referring to fig. 14, a case 1302 of a battery pack 1301 includes a top plate 1401 (the top plate 1401 is omitted in fig. 13), and the top plate 1401 may abut against the movable cover 102, thereby preventing the movable cover 102 from being rotated upward by an excessive angle.

Referring to fig. 1 and 2, in some embodiments, the arrangement directions of two adjacent movable covers 102 may be opposite to each other, so as to allow a larger operation space for installing the movable covers 102. Specifically, when one end of the movable cover 102 for connection to the mounting portion 201 is referred to as a connection end and one end of the movable cover 102 away from the connection end is referred to as a movable end, the connection end of any one movable cover 102 is provided adjacent to the movable end of the other movable cover 102 with respect to two adjacent movable covers 102. For example, taking fig. 1 or fig. 2 as an example, the left end of one of the movable covers 102 is used for connecting with the mounting portion 201, the left end of the movable cover 102 is the connecting end thereof, and the right end of the movable cover 102 is the movable end thereof; accordingly, the left end of one movable cover 102 adjacent to the movable cover 102 is a movable end, and the right end thereof is a connection end.

In this arrangement, the distance between the mounting portions 201 for connecting different movable covers 102 is relatively large along the arrangement direction of the movable covers 102, so that a relatively large operating space can be reserved for the hand of a user, and the user can conveniently mount or dismount the movable covers 102.

The present invention also provides a battery module 800, wherein the battery module 800 comprises a module housing 503 and a plurality of batteries 401, wherein the module housing 503 comprises a module lower case 501 and the module upper cover 100 in any of the above embodiments. Referring to fig. 5 or 6, the module lower case 501 has a first receiving cavity 502, and the module upper cover 100 is coupled to the module lower case 501 and covers the first receiving cavity 502. Specifically, the module upper cover 100 and the module lower cover 501 can be connected by screws, the module upper cover 100 and the module lower cover 501 can be bonded by glue, and the module upper cover 100 and the module lower cover 501 can be connected by clamping; the connection between the module top cover 100 and the module bottom cover 501 is not necessarily an example. The battery 401 is accommodated in the first accommodating cavity 502, and the first air vent 103 is communicated with the first accommodating cavity 502. The gas in the battery 401 is firstly exhausted into the first accommodating cavity 502 through the explosion-proof valve 404 of the battery 401, and when the gas pressure in the first accommodating cavity 502 is sufficiently large, the gas in the first accommodating cavity 502 is exhausted through the first exhaust hole 103.

The battery module 800 further includes a tab 1001 for connecting the plurality of cells 401 in the battery module 800 in series or in parallel, and an electrical separator 801 for primarily mounting the tab 1001.

Referring to fig. 4, the top cover 403 of the battery 401 also includes a pole 407, the pole 407 including a positive pole 405 and a negative pole 406. Referring to fig. 8 and 9, an electrical isolation plate 801 is placed on top of the battery 401, and the positive post 405 and the negative post 406 of the battery 401 pass through the electrical isolation plate 801 from bottom to top. Referring to fig. 9, electrical isolation plate 801 has positioning hole 901, positive post 405 and negative post 406 are disposed in positioning hole 901, and connection piece 1001 may also be disposed in positioning hole 901. The connection tab 1001 is provided as a conductor (for example, the connection tab 1001 is provided as a sheet of aluminum), and the top surface of the positive post 405 and the top surface of the negative post 406 may be welded (or bonded by conductive paste) to the connection tab 1001.

The connection tab 1001 is provided in plurality, and the connection tab 1001 can connect a plurality of cells 401 in series. For example, referring to fig. 9 and 11, a part of the connection tab 1001 may be connected to one positive post 405 and one negative post 406 at the same time, and the positive post 405 and the negative post 406 connected to the same connection tab 1001 belong to different batteries 401, respectively. Accordingly, the arrangement of the two adjacent batteries 401 is opposite. For example, referring to fig. 11, for one of the cells 401, its positive post 405 is on the right side and its negative post 406 is on the left side; and the adjacent cell 401 has its positive post 405 on the left and its negative post 406 on the right. And one end of the battery module 800 has a connection tab 1001 connected only to the positive post 405, and the other end of the battery module 800 has a connection tab 1001 connected only to the negative post 406, and these two connection tabs 1001 may be connected to conductive members (cables, copper bars, etc.) outside the battery module 800, so as to output the electric power of the battery module 800.

Connection tab 1001 may also connect multiple cells 401 in parallel. For example, referring to fig. 12, two connection pieces 1001 are provided, the negative posts 406 of all the cells 401 are connected to one of the connection pieces 1001, and the positive posts 405 of all the cells 401 are connected to the other connection piece 1001. Both the connection tabs 1001 are used to connect with conductive members outside the battery module 800, thereby outputting electric power of the battery module 800.

Referring to fig. 9 and 10, the electrical isolation plate 801 may have a second vent hole 902, the explosion proof valve 404 being opposite to the second vent hole 902, and the second vent hole 902 being opposite to the first vent hole 103. Under such a setting, the gas flowing out of the explosion-proof valve 404 may sequentially pass through the second exhaust hole 902 and the first exhaust hole 103 from bottom to top, and thus flow out to the outside of the battery module 800, the exhaust path of the gas is short, and the tortuosity of the path is also low, which is advantageous to reduce the exhaust resistance of the battery module 800, so that the gas is rapidly exhausted to the outside of the battery module 800.

It should be noted that, referring to fig. 1, the cover plate 101 further has a second receiving groove 104, the second receiving groove 104 is used for receiving an output electrode holder or a connector (not specifically shown) of the battery module 800, after the battery module 800 is assembled, the second receiving groove 104 is blocked by the output electrode holder or the connector, and the gas inside the battery module 800 is not discharged through the second receiving groove 104.

The invention further provides a battery pack 1301, wherein the battery pack 1301 comprises a plurality of battery modules 800 in any of the above embodiments, and a box 1302. Referring to fig. 13, the case 1302 has a second receiving cavity 1303 and a third exhaust hole 1304, the third exhaust hole 1304 is communicated with the second receiving cavity 1303, and the battery module 800 is received in the second receiving cavity 1303. The gas exhausted from the battery module 800 is firstly exhausted into the second receiving cavity 1303, and then exhausted from the third exhaust hole 1304 to the outside of the battery pack 1301, so as to prevent the battery pack 1301 from being damaged or causing safety accidents due to the accumulation of high-temperature gas inside the case 1302.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims

1. Module upper cover, its characterized in that includes:

a cap plate for covering a top of the battery, the cap plate having at least one first vent hole;

the movable cover is movably connected with the cover plate and arranged on the upper side of the cover plate, each movable cover covers and seals at least one first exhaust hole, and the movable cover can be pushed by gas below the movable cover to move upwards so as to remove the sealing of the first exhaust hole by the movable cover.

2. The modular cover of claim 1, wherein the cover plate comprises a cover portion and at least one mounting portion, the first venting aperture being disposed in the cover portion; the mounting part is connected to the top of the covering part and protrudes relative to the top of the covering part, and the mounting part is provided with a mounting hole;

the movable cover comprises a baffle plate and a connecting body, the baffle plate covers the first exhaust hole, one end of the baffle plate is connected with the side part of the connecting body, and the end part of the connecting body is rotatably arranged in the mounting hole.

3. The modular upper cover according to claim 2, wherein the baffle comprises a constriction and a main body, the main body and the connecting body being connected to two sides of the constriction, respectively;

along the axial direction of the connecting body, the end of the main body part is protruded relative to the contraction part, and the end of the connecting body is protruded relative to the contraction part, so that a first accommodating groove is defined by the connecting body, the main body part and the contraction part together, and a part of the mounting part is accommodated in the first accommodating groove.

4. The modular cover of claim 1, wherein the cover plate comprises a cover portion and at least one mounting portion, the first venting aperture being disposed in the cover portion; the mounting part is connected to the top of the covering part and protrudes relative to the top of the covering part, and the mounting part is provided with a sliding groove;

the movable cover comprises a baffle plate and a connecting body, the baffle plate covers the first exhaust hole, one end of the baffle plate is connected with the side portion of the connecting body, the connecting body is slidably arranged in the sliding groove, and the connecting body can slide up and down along the sliding groove.

5. The modular upper cover according to any one of claims 2 to 4, wherein each of the connecting bodies is connected to two of the mounting portions; for two installation parts connected with the same connecting body, one side of any installation part, facing to the other installation part, can be abutted against the baffle plate so as to block the baffle plate from moving along the axial direction of the connecting body.

6. The module upper cover according to claim 1, wherein a plurality of movable covers are provided, one end of each movable cover, which is used for being connected with the cover plate, is a connecting end, and the end, which is far away from the connecting end, of each movable cover is a movable end;

and for two adjacent movable covers, the movable end of one movable cover is arranged adjacent to the connecting end of the other movable cover along the arrangement direction of the plurality of movable covers.

7. The modular cover of claim 1, wherein the cover plate and the removable cover are each made of an insulating material.

8. Battery module, its characterized in that includes:

a module case including a module lower case having a first accommodation chamber, and a module upper cover as recited in any one of claims 1 to 7, the module upper cover being attached to the module lower case to cover the first accommodation chamber, the first vent hole communicating with the first accommodation chamber;

the battery is provided with a plurality of, the battery hold in first holding chamber, the top of battery has explosion-proof valve, explosion-proof valve with first exhaust hole is relative.

9. The battery module according to claim 8, further comprising:

the connecting sheets are arranged as conductors and are electrically connected with the batteries so as to enable the batteries in the battery module to be connected in series or in parallel;

the electrical isolation plate is insulated, the connecting piece is installed in the electrical isolation plate, the electrical isolation plate is arranged in the first accommodating cavity, the electrical isolation plate covers the top of the battery, the electrical isolation plate is provided with a second exhaust hole, the second exhaust hole is opposite to the explosion-proof valve, and the first exhaust hole is opposite to the second exhaust hole.

10. A battery pack, comprising:

the box body is internally provided with a second accommodating cavity and is also provided with a third exhaust hole which is communicated with the second accommodating cavity;

the battery module according to claim 8 or 9, wherein a plurality of battery modules are provided, and the plurality of battery modules are accommodated in the second accommodating cavity.