CN111416175A

CN111416175A - Battery module

Info

Publication number: CN111416175A
Application number: CN202010211390.2A
Authority: CN
Inventors: 李永通; 周凌; 郭良银; 敖长宣
Original assignee: Zhuhai Kechuang Power Electronics Co ltd
Current assignee: Zhuhai Kechuang Power Electronics Co ltd
Priority date: 2020-02-12
Filing date: 2020-03-24
Publication date: 2020-07-14

Abstract

The invention discloses a battery module, comprising: an electric core; the battery cell is arranged on the mounting parts, and a channel for air to flow up and down is formed between every two adjacent mounting parts; the upper air duct structure is arranged at the upper end of the fixing part, the lower air duct structure is arranged at the lower end of the fixing part, and a first ventilation opening and a second ventilation opening are respectively formed in the upper air duct structure and the lower air duct structure. The upper air duct structural member and the lower air duct structural member are adopted to form the air ducts connected in parallel, the electric cores are subjected to heat convection through cold air pumped into the external environment, the temperature of the electric cores is reduced, and the temperature uniformity among the electric cores is good.

Description

Battery module

Technical Field

The invention relates to the field of batteries, in particular to a battery module.

Background

The battery module is an integral power supply unit formed by a plurality of batteries in a series-parallel connection mode, and because the number of the batteries is large, the battery module can generate a large amount of heat in the charging and discharging process, and the heat needs to be dissipated in time in order to ensure the stable operation of a system. At present, the heat is mainly dissipated by adopting an air cooling mode, a heat dissipation fan is arranged on one side of each electric core, the heat dissipation air channel is arranged left and right or front and back, and is in series connection with each other and needs to be dissipated through a plurality of electric cores, so that the problem of temperature difference of the battery around the battery exists, and the heat dissipation is uneven.

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 battery module which can improve the temperature uniformity among the battery cores in the module.

A battery module according to the present invention includes: a plurality of battery cells; the battery cell is arranged in the fixing piece, and a channel for air to flow up and down is formed between every two adjacent battery cells; the upper air duct structure is arranged at the upper end of the fixing part, the lower air duct structure is arranged at the lower end of the fixing part, and a first ventilation opening and a second ventilation opening are respectively arranged on the upper air duct structure and the lower air duct structure; the channels are connected with the single battery cell in parallel, and two ends of each channel are respectively communicated with the upper air duct structural member and the lower air duct structural member.

The battery module according to the embodiment of the invention at least has the following beneficial effects: adopt the parallel passageway between last wind channel structure and lower wind channel structure and the electric core to form the heat dissipation wind channel, the wind channel is upper and lower ventilation mode, can be the bottom air inlet, the top air-out, also can be the top air inlet, the bottom air-out, cold wind through the external environment carries out the heat convection to electric core, reduce electric core temperature, cold wind just discharges through the passageway between single electric core, it dispels the heat through a plurality of electric cores not to repeat, avoid behind refrigerated air temperature to promote and lead to electric core temperature to have the difference, temperature homogeneity between the electric core is good.

According to some embodiments of the invention, the upper duct structure and the lower duct structure are both wedge-shaped, and the upper duct structure and the lower duct structure are arranged in opposite directions.

According to some embodiments of the invention, the fixing member includes a fixing frame, a first partition plate and a second partition plate, the first partition plate and the second partition plate are disposed in the fixing frame, the fixing frame is divided into the plurality of mounting portions by the first partition plate and the second partition plate, the mounting portions are used for placing the battery cells, the channel for the gas to flow up and down is disposed between the adjacent mounting portions, and the bottom of the mounting portion is provided with a convex edge.

According to some embodiments of the invention, the middle part of the second partition board is a hollow structure or the second partition board is provided with a groove which is through up and down.

According to some embodiments of the invention, the device further comprises a shell, the upper end of the shell is open, the fixing piece is arranged in the shell, and the bottom of the shell is provided with a through hole.

According to some embodiments of the invention, the lower duct structure is provided with a baffle.

According to some embodiments of the invention, the first ventilation opening is provided at a side of the upper duct structure, and the second ventilation opening is provided at a side of the lower duct structure.

According to some embodiments of the invention, the first ventilation opening is disposed at a side surface of the upper duct structure, and the second ventilation opening is disposed at a bottom surface of the lower duct structure.

According to some embodiments of the invention, a fan is disposed on the first vent or the second vent.

According to some embodiments of the invention, the upper end of the cell is provided with a busbar.

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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is an exploded view of a battery module according to another embodiment of the present invention;

fig. 5 is a schematic structural view of a battery module according to another embodiment of the present invention;

fig. 6 is a sectional view B-B of fig. 5.

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 of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the 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.

The battery module provided by the embodiment of the invention comprises a plurality of battery cells 1, fixing pieces 2, an upper air duct structural member 3 and a lower air duct structural member 4. The battery cells 1 are arranged in the fixing piece 2, and a channel 7 for air to flow up and down is arranged between every two adjacent battery cells; the upper air duct structural member 3 is arranged at the upper end of the fixing member 2, the lower air duct structural member 4 is arranged at the lower end of the fixing member 2, and the upper air duct structural member 3 and the lower air duct structural member 4 are respectively provided with a first ventilation opening 31 and a second ventilation opening 41; the channels 7 are connected with the single battery cell 1 in parallel, and two ends of each channel 7 are respectively communicated with the upper air duct structural member 3 and the lower air duct structural member 4. When using, with first vent 31 or second vent 41 towards air conditioner or the cooling fan who is equipped with in the battery management system, adopt the parallel passageway 7 between last wind channel structure 3 and lower wind channel structure 4 and the electric core to form the heat dissipation wind channel, the wind channel is upper and lower ventilation mode, can be the bottom air inlet, the top air-out, also can be the top air inlet, the bottom air-out, single passageway 7 connects in parallel between single electric core 1, consequently outside cooling wind just flows out the battery module through parallelly connected passageway 7 cooling single electric core 1, because every electric core 1 all is equipped with the passageway 7 of respective cold wind business turn over, so the effect difference of every electric core 1 cooling is little, the problem of battery temperature difference around can not having, can improve the temperature homogeneity between the electric core 1 in the module, improve battery life.

Referring to fig. 1, 2 and 3, in some embodiments, the upper duct structural member 3 and the lower duct structural member 4 are wedge-shaped, and the upper duct structural member 3 and the lower duct structural member 4 are arranged in opposite directions, so that the wedge-shaped structural members are complementary to form a rectangular structure. The upper air duct structural member 3 and the lower air duct structural member 4 can be made of metal materials, plastic materials and the like, and the flame-retardant insulating plastic materials are recommended to be used, so that the safety performance is good. After the upper air duct structural member 3 and the lower air duct structural member 4 are assembled, the upper air duct structural member 3 and the lower air duct structural member 4 are mutually wedged, so that the occupied space of the upper air duct structural member 3 and the occupied space of the lower air duct structural member 4 can be reduced, and the space utilization rate can be effectively improved.

In some embodiments of the present invention, the second ventilation opening 41 is disposed on the side of the lower air duct structure 4, so that the battery modules can be stacked up and down conveniently in use. The second ventilation opening 41 is provided with a fan 42, and cold air pumped into the external environment through the fan 42 carries out convection heat exchange on the electric core 1, so that the temperature of the electric core 1 is reduced. This embodiment does not use an external air conditioner or a heat radiation fan, and draws or exhausts air through the fan 42 provided in the embodiment. The fans 42 may accordingly be provided in one or more. The first ventilation opening 31 is arranged on the thick side face of the wedge-shaped structure, and can be round, rectangular or other, or the thick side face can be removed to form a large air outlet face. In some embodiments, the fan 42 may also be disposed at the first vent 31.

The lower air duct structural member 4 is provided with a plurality of baffles 43. The baffle 43 may be a curved structure or a flat structure, and is used to adjust air flow and perform heat convection to the channels 7 between the cells 1 through which air can be uniformly distributed. The baffle 43 may be mounted on a separate structural member, or may be integrally formed with the lower duct structural member 4, for example, by mold-opening injection molding

In some embodiments of the present invention, the fixing member 2 includes a fixing frame 21, a first partition plate 22 and a second partition plate 23, the first partition plate 22 and the second partition plate 23 are disposed in the fixing frame 21, the first partition plate 22 is disposed on the second partition plate 23 or the fixing frame 21 and is perpendicular to the second partition plate 23, the fixing frame 21 is divided into a plurality of rectangular mounting portions by the first partition plate 22 and the second partition plate 23, the electric core 1 is placed in the mounting portion, the second partition plate 23 is provided with a channel 7 for allowing the gas to flow up and down, the bottom of the mounting portion is provided with a convex edge 24, and the convex edge 24 is used for abutting against the bottom of the electric core 1 and placing the electric core 1 to prevent the electric core 1 from sliding.

Referring to fig. 1, the middle of the second partition 23 is a hollow structure, and when the battery cell 1 is placed, a channel 7 for air to flow up and down is formed. It is conceivable that the second partition 23 is provided with a groove extending vertically therethrough, and that the passage 7 for the gas to flow vertically therethrough may be formed.

The battery module of the embodiment of the invention further comprises a shell 5, the upper end of the shell 5 is open, the fixing piece 2 is arranged in the shell 5, the bottom of the shell 5 is provided with a through hole 51, the lower end of the shell 5 is provided with a lower air duct structural piece 4, and the upper end of the shell 5 is provided with an upper air duct structural piece 3. The housing 5 is used to protect the fixing member 2 and the internal battery core 1. Specifically, one or more through holes 51 may be provided, the through holes 51 are located below the channel 7, and the shape of the through holes 51 is not limited, for example, the through holes 51 are in the shape of a strip, a circle, a square, or the like. Through the arrangement of the through holes 51, the upper end and the lower end of the lower air duct structural member 4, the shell 5, the fixing member 2 and the upper air duct structural member 3 are communicated, so that the air flow is facilitated.

In some embodiments of the present invention, the upper end of the battery cell 1 is provided with a bus bar 6. The bus bar 6 can be made of aluminum bars or copper bars and other materials with good conductivity, and the bus bar 6 is used for connecting the battery cell 1 and an external lead.

Referring to fig. 4 to 6, another embodiment of the present invention includes a plurality of battery cells 1, a fixing member 2, an upper duct structural member 3, and a lower duct structural member 4. The battery cells 1 are arranged in the fixing piece 2, and a channel 7 for air to flow up and down is arranged between every two adjacent battery cells; the upper air duct structural member 3 is arranged at the upper end of the fixing member 2, the lower air duct structural member 4 is arranged at the lower end of the fixing member 2, and the upper air duct structural member 3 and the lower air duct structural member 4 are respectively provided with a first ventilation opening 31 and a second ventilation opening 41; the channels 7 are connected with the single battery cell 1 in parallel, and two ends of each channel 7 are respectively communicated with the upper air duct structural member 3 and the lower air duct structural member 4. The battery module of this embodiment still includes

casing

5, 5 upper end openings of casing, mounting 2 sets up in the

casing

5, 5 bottoms of casing are equipped with through-hole 51, the lower extreme of casing 5 is equipped with down wind channel structure 4, the upper end of casing 5 is equipped with wind channel structure 3. The housing 5 is used to protect the fixing member 2 and the internal battery core 1.

Referring to fig. 4, the upper duct structural member 3 and the lower duct structural member 4 are both rectangular frames, and one side of the upper duct structural member 3 is provided with a first vent 31. The second ventilation openings 41 are formed in the bottom of the lower air duct structural member 4, four second ventilation openings 41 are formed in the bottom of the specific lower air duct structural member 4, a fan 41 is arranged at the bottom of each second ventilation opening 41, the fan 41 sucks external air and enables the external air to flow through the channel 7 and the upper air duct structural member 3 to be discharged, and the external air cools each battery cell 1 through the parallel channel 7.

This embodiment adopts the bottom air inlet, the mode of top air-out, single passageway 7 connects in parallel between single electric core 1, therefore the single electric core 1 of outside cooling wind cooling through parallelly connected passageway 7 just flows out the battery module, because every electric core 1 all is equipped with the passageway 7 of respective cold wind business turn over, so the effect difference of every electric core 1 cooling is little, the problem of battery temperature difference around can not having, can improve the temperature homogeneity between the electric core 1 in the module, improve battery life.

Claims

1. A battery module, comprising:

a plurality of cells (1);

the battery cell comprises a fixing piece (2), wherein the battery cells (1) are arranged in the fixing piece (2), and a channel (7) for air to flow up and down is formed between every two adjacent battery cells;

the air conditioner comprises an upper air duct structural part (3) and a lower air duct structural part (4), wherein the upper air duct structural part (3) is arranged at the upper end of a fixing part (2), the lower air duct structural part (4) is arranged at the lower end of the fixing part (2), and a first ventilation opening (31) and a second ventilation opening (41) are respectively arranged on the upper air duct structural part (3) and the lower air duct structural part (4);

the channels (7) are connected with the single battery cell (1) in parallel, and two ends of each channel (7) are respectively communicated with the upper air duct structural member (3) and the lower air duct structural member (4).

2. The battery module according to claim 1, wherein: the upper air duct structural part (3) and the lower air duct structural part (4) are both wedge-shaped, and the upper air duct structural part (3) and the lower air duct structural part (4) are arranged in opposite directions.

3. The battery module according to claim 1, wherein: mounting (2) are including mount (21), first baffle (22) and second baffle (23), and first baffle (22) and second baffle (23) set up in mount (21), first baffle (22) and second baffle (23) will mount (21) are separated for a plurality of the installation department, the installation department is used for placing electric core (1), it circulates about having the gas between the adjacent installation department passageway (7), the bottom of installation department is equipped with protruding edge (24).

4. The battery module according to claim 3, wherein: the middle part of the second clapboard (23) is of a hollow structure or the second clapboard (23) is provided with a groove which is communicated up and down.

5. The battery module according to claim 1, wherein: still include casing (5), casing (5) upper end opening, mounting (2) set up in casing (5), casing (5) bottom is equipped with through-hole (51).

6. The battery module according to claim 1, wherein: and a baffle (43) is arranged on the lower air duct structural part (4).

7. The battery module according to claim 1, wherein: the first ventilation opening (31) is arranged on the side face of the upper air duct structural member (3), and the second ventilation opening (41) is arranged on the side face of the lower air duct structural member (4).

8. The battery module according to claim 1, wherein: the first ventilation opening (31) is arranged on the side face of the upper air duct structural member (3), and the second ventilation opening (41) is arranged on the bottom face of the lower air duct structural member (4).

9. The battery module according to claim 1, 7 or 8, wherein: and a fan (42) is arranged on the first ventilation opening (31) or the second ventilation opening (41).

10. The battery module according to claim 1, wherein: and a bus bar (6) is arranged at the upper end of the battery cell (1).