CN217158537U - Box and battery pack - Google Patents

Abstract

The utility model provides a box and battery package. The box body comprises an upper shell and a lower shell. The upper shell covers the top of the lower shell, the upper shell and the lower shell jointly enclose an accommodating cavity, and the lower shell comprises a first end plate and two side plates; the inside of first end plate has first flow channel, and the inside of curb plate has the side flow channel, and first flow channel communicates with the side flow channel, and the top surface of curb plate has at least one first air inlet, and first end plate has the gas vent, and holding chamber and side flow channel all communicate with first air inlet, first flow channel and gas vent intercommunication. The battery pack comprises the box body. The box body and the battery pack provided by the utility model have the advantages that the gas in the box body can be discharged out of the box body, so that the battery pack is prevented from thermal runaway; in addition, since the first air inlet is provided at the top surface of the side plate, the distance between the battery and the side plate can be set small, which is advantageous to improve the energy density of the battery pack.

Description

Box and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a box and battery package.

Background

During high load operation of the battery pack, the batteries in the battery pack may discharge a large amount of high-temperature gas; in order to avoid thermal runaway of the battery pack, the box body of the battery pack is provided with an exhaust channel so that the high-temperature gas is exhausted out of the box body. However, in some battery packs, the arrangement of the air inlet of the air exhaust channel is not reasonable, which limits the layout of the battery pack, thereby affecting the energy density of the battery pack.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a box has the gas outgoing's that can supply the box inside passageway, and the position that supplies the air inlet that the gas got into this passageway in the box sets up rationally, is favorable to improving the energy density of battery package.

The utility model also provides a battery package of having above-mentioned box.

According to the utility model discloses a box of first aspect embodiment, include: an upper shell; the upper shell covers the top of the lower shell, the upper shell and the lower shell jointly enclose an accommodating cavity, the lower shell comprises a first end plate and two side plates, the two side plates are arranged at intervals, the first end plate is connected with the end parts of the side plates, and the two side plates are respectively connected to the two ends of the first end plate; the first end plate is provided with a first flow channel inside, the side plate is provided with a side flow channel inside, the first flow channel is communicated with the side flow channel, the top surface of the side plate is provided with at least one first air inlet, one side of the first end plate, which is opposite to the accommodating cavity, is provided with an air outlet, the accommodating cavity and the side flow channel are communicated with the first air inlet, and the first flow channel is communicated with the air outlet.

According to the utility model discloses box has following beneficial effect at least: when the battery discharges more high-temperature gas, the air pressure in the accommodating cavity is increased, and the gas (containing the high-temperature gas discharged by the battery) in the accommodating cavity can enter the side flow channel through the first air inlet, then flow along the side flow channel and enter the first flow channel, and finally flow out through the air outlet. High-temperature gas in the box body can be smoothly discharged, and thermal runaway of the battery pack caused by accumulation of the high-temperature gas is avoided. Because first air inlet is seted up at the top surface of curb plate, even if the distance between battery and the curb plate sets up for lessly, thereby the first air inlet can not appear and sheltered from the condition that influences the inside of high-temperature gas entering curb plate. Therefore, the box body provided by the utility model can discharge the gas in the box body, and avoid the thermal runaway of the battery pack; simultaneously, the first air inlet of this box sets up rationally, and first air inlet setting is at the top of curb plate, and under this kind of setting condition, can reduce the distance between battery and the curb plate in order to reduce the clearance between curb plate and the battery, thereby improve the compact structure nature of battery package and improve the energy density of battery package.

According to some embodiments of the present invention, the lower case further comprises a second end plate, both of the side plates are connected to the second end plate, and the second end plate and the first end plate are respectively connected to both ends of the side plates; the second end plate is internally provided with a second flow channel communicated with the side flow channel, and is also provided with a second air inlet communicated with the containing cavity.

According to some embodiments of the invention, the second end plate comprises: the two base parts are respectively connected with the two side plates and are arranged at intervals along the arrangement direction of the side plates to form an avoidance gap; the two ends of the protruding part are respectively connected with the two base parts, and the protruding part is connected to one side, back to the first end plate, of the base part and protrudes relative to the base part in the direction away from the first end plate; the second air inlet is arranged on the end face of one end, facing the avoiding gap, of the base, and the second flow channel is arranged in the base.

According to some embodiments of the utility model, the inferior valve still includes the cross slab, the cross slab is located the holding intracavity, the both ends of cross slab respectively with two the curb plate is connected, first end plate with the second end plate all with the cross slab interval sets up.

According to some embodiments of the utility model, the inferior valve still includes at least one longitudinal baffle, longitudinal baffle sets up the holding intracavity, longitudinal baffle's both ends respectively with the cross slab first end plate is connected.

According to some embodiments of the present invention, the two side plates are a first side plate and a second side plate, respectively, and the first air inlet on the first side plate is disposed on one side of the top surface of the first side plate close to the second side plate; the first air inlet on the second side plate is arranged on one side, close to the first side plate, of the top surface of the second side plate.

According to some embodiments of the present invention, each of the side plates has a plurality of the first air inlets, same on the side plate, a plurality of the first air inlets are along the length direction interval distribution of the side plate.

According to the utility model discloses a battery package of second aspect embodiment, including the box of first aspect embodiment to and a plurality of battery, the battery sets up in the holding chamber.

According to the utility model discloses battery package has following beneficial effect at least: the gas in the box body can be discharged out of the box body, the battery pack is not easy to generate thermal runaway, and the safety of the battery pack is high; in addition, because the first air inlet is arranged on the top surface of the side plate, the distance between the battery and the side plate can be set to be smaller, and the structure compactness and the energy density of the battery pack are higher.

According to some embodiments of the utility model, still include explosion-proof valve, explosion-proof valve install in the gas vent.

According to some embodiments of the present invention, the battery pack further comprises a connector, one end of the connector being electrically connected to the battery; the side plate is also provided with a wiring channel, the wiring channel and the side flow channel are mutually separated, and one part of the connecting piece is arranged in the wiring channel in a penetrating way.

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 will be further described with reference to the following drawings and examples, in which:

FIG. 1 is an exploded view of the case of the present invention;

FIG. 2 is a perspective view of the lower shell of the case;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is an enlarged view of area B of FIG. 2;

FIG. 5 is a simplified schematic illustration of a side flow path inside a side plate;

FIG. 6 is a schematic view of the gas exhaust from the tank;

FIG. 7 is a schematic view of the mating relationship between the rows and the side panels in one embodiment;

fig. 8 is an enlarged schematic view of region C in fig. 7.

Reference numerals: 100-box body, 101-upper shell, 102-lower shell, 201-first end plate, 202-second end plate, 203-side plate, 204-transverse partition plate, 205-longitudinal partition plate, 206-bottom plate, 207-first side plate, 208-second side plate, 301-first air inlet, 401-base part, 402-bulge part, 403-second air inlet, 404-avoiding gap, 501-containing cavity, 502-side flow channel, 601-air outlet, 602-explosion-proof valve, 603-second flow channel, 604-first flow channel, 701-connecting row and 801-wiring channel.

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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, 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, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, 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 there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

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" or the like 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 utility model provides a box 100, this box 100 is used for the holding battery. Referring to fig. 1, the case 100 includes an upper case 101 and a lower case 102, the upper case 101 covers the top of the lower case 102, a cavity enclosed by the upper case 101 and the lower case 102 is a receiving cavity 501 (the position of the receiving cavity 501 can refer to fig. 5), and the battery is installed in the receiving cavity 501. Referring to fig. 2, the lower case 102 includes a first end plate 201 and two side plates 203, the two side plates 203 are spaced apart, the first end plate 201 is connected to ends of the side plates 203, and the two side plates 203 are respectively connected to both ends of the first end plate 201.

Referring to fig. 3, 5 and 6, the side plate 203 and the first end plate 201 are both hollow, the side plate 203 has a side flow path 502 inside, the first end plate 201 has a first flow path 604 inside, and the side flow path 502 and the first flow path 604 communicate with each other. The side plate 203 and the first end plate 201 may be machined from a profile, and some of the cavities inside the profile may serve as the side flow channel 502 or the first flow channel 604. The top surface of the side plate 203 has at least one first inlet 301, the first inlet 301 is communicated with the accommodation chamber 501, and the first inlet 301 is communicated with the side flow channel 502. The side of the first end plate 201 opposite to the accommodating chamber 501 is provided with an air outlet 601, and the air outlet 601 is communicated with the first flow channel 604.

In fig. 6, the dashed arrows indicate the flow path of the process of the gas flowing out of the housing chamber to the outside of the case; the first gas inlet 301 is not specifically shown in fig. 6, and the dashed arrows passing through the side plate 203 toward the left or right in fig. 6 indicate that gas enters the side flow channel from the first gas inlet. With reference to fig. 5 and 6, when the battery discharges more high-temperature gas, the gas pressure in the accommodating chamber 501 increases, and the gas in the accommodating chamber 501 (containing the high-temperature gas discharged by the battery) can enter the side flow channel 502 through the first gas inlet 301, then flow along the side flow channel 502 and enter the first flow channel 604, and finally flow out through the gas outlet 601. The high-temperature gas in the box body 100 can be smoothly discharged, and the thermal runaway of the battery pack caused by the accumulation of the high-temperature gas is avoided.

Since the first air inlet 301 is provided on the top surface of the side plate 203, even if the distance between the battery and the side plate 203 is set to be small, the first air inlet 301 is not blocked to affect the high-temperature gas entering the inside of the side plate 203. Therefore, the box body 100 provided by the utility model can discharge the gas in the box body 100, and avoid the thermal runaway of the battery pack; meanwhile, the first air inlet 301 of the box body 100 is arranged reasonably, the first air inlet 301 is arranged at the top of the side plate 203, and under the arrangement condition, the distance between the battery and the side plate 203 can be reduced so as to reduce the gap between the side plate 203 and the battery, so that the structural compactness of the battery pack is improved, and the energy density of the battery pack is improved.

When the side plate 203 is long, a plurality of first air inlets 301 may be disposed on the side plate 203, and the plurality of first air inlets 301 on the same side plate 203 are distributed at intervals along the length direction of the side plate 203. This can avoid local accumulation of high temperature gas due to the cell in a certain region being too far away from the first gas inlet 301.

Referring to fig. 2, the lower case 102 further includes a second end plate 202 and a bottom plate 206. The second end plate 202 is connected to one end of the side plate 203 far away from the first end plate 201, and the two side plates 203 are respectively connected to two ends of the second end plate 202. The bottom of the second end plate 202, the first end plate 201 and the side plate 203 are all connected with a bottom plate 206, and the bottom plate 206 carries the battery.

The upper case 101 and the lower case 102 may be connected by screws, welding, or the like. The top surfaces of the first end plate 201, the second end plate 202 and the side plate 203 can all abut against the upper shell 101, so as to support the upper shell 101. In order to ensure that the first air inlet 301 is not blocked by the upper casing 101, the upper casing 101 may be abutted against the outer portion of the top surface of the side plate 203, and the first air inlet 301 may be disposed at the inner portion of the top surface of the side plate 203.

Specifically, referring to fig. 2 and fig. 3, if the two side plates 203 are respectively referred to as a first side plate 207 and a second side plate 208, the first air inlet 301 of the first side plate 207 is disposed on the top surface of the first side plate 207, and is located on one side of the top surface of the first side plate 207, which is close to the second side plate 208; the first air inlet 301 of the second side plate 208 is disposed on the top surface of the second side plate 208, and is located on one side of the top surface of the second side plate 208 close to the first side plate 207. Taking the first side plate 207 as an example, and taking the direction in fig. 3 as a reference, the first air inlet 301 of the first side plate 207 is disposed in a left area of the top surface of the first side plate 207, and a right area of the top surface of the first side plate 207 is used for abutting and supporting the upper casing 101.

In the case that the distance between the first end plate 201 and the battery closest to the first end plate 201 is small, a large distance is required between the second end plate 202 and the battery closest to the second end plate 202 to accommodate some electrical components (e.g., cables, battery disconnect units, etc.) in the battery pack. On this basis, referring to fig. 4 and 6, the second end plate 202 may have a second air inlet 403 and a second flow channel 603, the second flow channel 603 being provided inside the second end plate 202; the second flow path 603 communicates with the side flow path 502, and both the housing chamber 501 and the second flow path 603 communicate with the second inlet port 403. Gas near the second end plate 202 may enter the second flow channel 603 through the second gas inlet 403 and flow through the side flow channel 502, the first flow channel 604, and finally out the gas outlet 601 in sequence.

Referring to fig. 4, in some embodiments, the second end plate 202 includes a base 401 and a projection 402. The two base portions 401 are provided at intervals in the arrangement direction of the side plates 203, and form an escape gap 404. The two ends of the protruding portion 402 are respectively connected with the two base portions 401, the protruding portion 402 is in a "C" shape, the protruding portion 402 is connected to a side of the base portion 401 opposite to the first end plate 201, and the protruding portion 402 protrudes relative to the base portion 401 in a direction away from the first end plate 201. A battery disconnection unit (not shown) of the battery pack may be disposed in a space surrounded by the protrusion 402. Since the battery disconnection unit may also generate a large amount of heat during operation, in order to smoothly discharge high-temperature gas in the vicinity of the protrusion 402, the second gas inlet 403 may be provided at an end surface of the base 401 toward one end of the escape gap 404, and accordingly, the second flow channel 603 may be provided inside the base 401. In other embodiments, if the second end plate 202 is shaped similar to the first end plate 201, the second air inlet 403 may be disposed on the top surface of the base 401 or on the side of the base 401 facing the first end plate 201.

In order to position the battery for assembly of the battery pack, the lower case 102 may further include a separator for restraining the position of the battery in some embodiments. Referring to fig. 2, the lower shell 102 further includes a diaphragm plate 204, the diaphragm plate 204 is disposed in the accommodating cavity 501, two ends of the diaphragm plate 204 are respectively connected to the two side plates 203, and the first end plate 201 and the second end plate 202 are both spaced from the diaphragm plate 204. The diaphragm 204, the second end plate 202 and the two side plates 203 together define an area for placing batteries. The battery is placed between the second end plate 202 and the diaphragm 204. The distance between the second end plate 202 and the bulkhead 204 may be greater than the distance between the first end plate 201 and the bulkhead 204 to allow more room for batteries to be placed in the case 100.

In the case where a plurality of rows of batteries need to be placed in the battery pack, the lower case 102 may further include at least one longitudinal partition 205 in order to position each row of batteries for the assembly of the battery pack. Referring to fig. 2, the longitudinal partition 205 is disposed in the accommodating cavity 501, and both ends of the longitudinal partition 205 are connected to the transverse partition 204 and the first end plate 201, respectively. A plurality of batteries are arranged in the longitudinal direction of the side plate 203 to form a row of batteries, and a row of batteries is disposed between two adjacent longitudinal separators 205, or a row of batteries is disposed between one adjacent longitudinal separator 205 and one side plate 203.

The utility model also provides a battery package, battery package include box 100 in the above-mentioned embodiment. For the battery pack, the gas in the box body 100 can be discharged out of the box body 100, the battery pack is not easy to generate thermal runaway, and the safety of the battery pack is high; in addition, since the first air inlet 301 is provided on the top surface of the side plate 203, the distance between the battery and the side plate 203 can be set small, and the compactness and the energy density of the battery pack are high.

Referring to fig. 6, in some embodiments, the battery pack further includes an explosion-proof valve 602, and the explosion-proof valve 602 is installed in the exhaust port 601. In the case where the air pressure in the accommodating cavity 501 is low (for example, when the battery pack is in a low-load operating state), the explosion-proof valve 602 is in a closed state, and the gas in the box 100 cannot flow out to the external environment of the battery pack; at this time, the gas of the external environment cannot enter from the gas outlet 601, that is, the explosion-proof valve 602 is provided to prevent the external dust, water and the like from entering the case 100, thereby protecting the battery. When the air pressure in the accommodating cavity 501 rises to a certain value, the explosion-proof valve 602 is opened, and the air in the box body 100 can flow out from the exhaust port 601, so as to prevent the battery pack from thermal runaway. The specific structural principle of the explosion-proof valve 602 belongs to the well-known technology in the battery field, and is not described in detail here.

In the battery pack, the battery needs to be electrically connected to other electrical components in order to realize output of electric energy of the battery. The battery pack comprises a connecting piece, and one end of the connecting piece is electrically connected with the battery. In some embodiments, in order to improve the structural compactness of the battery pack, the side plate 203 may further be provided with a routing channel 801, and a portion of the connector is inserted into the routing channel 801.

For example, the battery pack further includes a Battery Disconnection Unit (BDU), and in order to achieve electrical connection between the battery disconnection unit and the battery, the battery pack further includes a connection bar 701, the connection bar 701 is a conductor, a specific material of the connection bar 701 may be copper, and electrical connection between the battery and the battery disconnection unit is achieved through the connection bar 701. Here, the connection row 701 corresponds to a connection piece. A portion of the connection bar 701 is inserted into the routing channel 801, one end of the connection bar 701 is electrically connected to the battery, and the other end of the connection bar 701 is electrically connected to the battery disconnection unit. The routing channel 801 and the side flow channel 502 are separated from each other (separated from each other means not directly communicating) so as not to increase the temperature of the bank 701 by high-temperature gas. It should be noted that fig. 7 and 8 mainly illustrate the approximate positions of the side flow channel 502 and the routing channel 801, and do not specifically illustrate the first air inlet 301 on the side plate 203.

If the side plate 203 is made of metal, in order to prevent the battery pack from short-circuiting, an insulation process is required to be performed on a portion of the side plate 203, which is likely to contact the connection bar 701; for example, the wall of the trace channel 801 is coated with an insulating material, and the wall of the trace channel 801 is separated from the connection row 701 by an insulating plate. Further, the connector is not limited to the above connection row, and the connector may be a cable such as a wire.

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 without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. The box, its characterized in that includes:

an upper shell;

the upper shell covers the top of the lower shell, the upper shell and the lower shell jointly enclose an accommodating cavity, the lower shell comprises a first end plate and two side plates, the two side plates are arranged at intervals, the first end plate is connected with the end parts of the side plates, and the two side plates are respectively connected to the two ends of the first end plate;

the first end plate is provided with a first flow channel inside, the side plate is provided with a side flow channel inside, the first flow channel is communicated with the side flow channel, the top surface of the side plate is provided with at least one first air inlet, one side of the first end plate, which is opposite to the accommodating cavity, is provided with an air outlet, the accommodating cavity and the side flow channel are communicated with the first air inlet, and the first flow channel is communicated with the air outlet.

2. A cabinet as claimed in claim 1, wherein the lower case further includes a second end plate, both of the side plates are connected to the second end plate, and the second end plate and the first end plate are connected to both ends of the side plates, respectively;

the second end plate is internally provided with a second flow channel communicated with the side flow channel, and is also provided with a second air inlet communicated with the containing cavity.

3. The cabinet of claim 2, wherein the second end panel includes:

the two base parts are respectively connected with the two side plates and are arranged at intervals along the arrangement direction of the side plates to form an avoidance gap;

the two ends of the protruding part are respectively connected with the two base parts, and the protruding part is connected to one side, back to the first end plate, of the base part and protrudes relative to the base part in the direction away from the first end plate;

the second air inlet is arranged on the end face of one end, facing the avoiding gap, of the base, and the second flow channel is arranged in the base.

4. The box body as claimed in claim 2, wherein the lower shell further comprises a transverse partition plate, the transverse partition plate is located in the accommodating cavity, two ends of the transverse partition plate are respectively connected with the two side plates, and the first end plate and the second end plate are both arranged at intervals with the transverse partition plate.

5. The box body as claimed in claim 4, wherein the lower shell further comprises at least one longitudinal partition plate, the longitudinal partition plate is disposed in the accommodating cavity, and two ends of the longitudinal partition plate are respectively connected with the transverse partition plate and the first end plate.

6. The box body as claimed in claim 1, wherein the two side plates are a first side plate and a second side plate respectively, and the first air inlet on the first side plate is arranged on one side of the top surface of the first side plate close to the second side plate; the first air inlet on the second side plate is arranged on one side, close to the first side plate, of the top surface of the second side plate.

7. A cabinet as claimed in claim 1, wherein each of the side panels has a plurality of the first inlet ports, and the plurality of the first inlet ports are spaced apart along the length of the side panel.

8. The battery pack is characterized by comprising the box body as claimed in any one of claims 1 to 7 and a plurality of batteries, wherein the batteries are arranged in the accommodating cavities.

9. The battery pack of claim 8, further comprising an explosion-proof valve mounted in the vent.

10. The battery pack of claim 8, further comprising a connector, one end of which is electrically connected to the battery; the side plate is also provided with a wiring channel, the wiring channel and the side flow channel are mutually separated, and one part of the connecting piece is arranged in the wiring channel in a penetrating way.

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