Battery pack, battery manufacturing method, and mold

Abstract

Embodiments of the present disclosure relate to the technical field of batteries, and provide a battery pack, a battery manufacturing method, and a mold. The battery pack comprises a case, a battery module, and a foam filler. An accommodating space is formed in the case, and a first explosion-proof valve is arranged on one side wall of the case. The battery module is formed by arranging a plurality of battery cells, and each battery cell is provided with a second explosion-proof valve; the battery module is arranged in the accommodating space. The foam filler is applied to filling between the battery module and the inner wall of the case; a fume and gas discharge channel is formed in the foam filler, and an outlet of the fume and gas discharge channel corresponds to the first explosion-proof valve; a plurality of second explosion-proof valves all correspond to the fume and gas discharge channel. The battery manufacturing method and the mold provided in the embodiments of the present disclosure are both configured to manufacture the battery pack, so as to achieve the purposes of increasing the energy density of batteries and improving the safety performance of batteries.

Description

Battery pack, battery manufacturing method and mold

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 2024106500739, filed on May 23, 2024, and entitled "Battery pack, battery manufacturing method and mold", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, in particular to a battery pack, a battery manufacturing method and a mold. BACKGROUND

[0004] With the popularization of new energy, the application scenarios of batteries are becoming more and more extensive, and the requirements for batteries are also becoming higher and higher. For example, the energy density, safety performance, overall strength and anti-vibration performance of the battery.

[0005] However, the current battery technology still has the problems of low energy density and low safety performance of the battery.

[0006] DISCLOSURE

[0007] Embodiments of the present disclosure provide a battery pack, a battery manufacturing method and a mold, which can improve the energy density of the battery and improve the safety performance of the battery.

[0008] Embodiments of the present disclosure can be implemented in the following way:

[0009] Embodiments of the present disclosure provide a battery pack, comprising:

[0010] a box body having an accommodating space inside, and a first explosion-proof valve arranged on one side wall of the box body;

[0011] a battery module formed by arranging a plurality of battery cells, and a second explosion-proof valve arranged on each of the battery cells; the battery module is arranged inside the accommodating space;

[0012] a foamed filler filled between the battery module and the inner wall of the box body; an exhaust passage is formed on the foamed filler, and the outlet of the exhaust passage corresponds to the first explosion-proof valve; and each of the second explosion-proof valves corresponds to the exhaust passage.

[0013] Optionally, the foamed filler is a flame-retardant foamed polyurethane adhesive.

[0014] Optionally, the smoke exhaust channel comprises a collection channel and a receiving channel, the receiving channel being in communication with the collection channel; a plurality of the second explosion-proof valves correspond to the receiving channel, and the collection channel corresponds to the first explosion-proof valve; the collection channel is arranged on one side of the foamed filler close to the side wall of the box.

[0015] Optionally, a plurality of the battery cells are arranged to form a plurality of groups of battery cells; a plurality of the receiving channels correspond to the plurality of groups of battery cells respectively, and a plurality of the second explosion-proof valves in each group of battery cells correspond to the corresponding receiving channel; the smoke exhaust channel further comprises a communication channel, and the plurality of receiving channels are in communication through the communication channel.

[0016] Optionally, the communication channel is arranged at the end of the plurality of receiving channels, and the collection channel is in communication with the communication channel to communicate with the plurality of receiving channels.

[0017] Optionally, the number of the first explosion-proof valves is two, and the two first explosion-proof valves are arranged on the opposite side walls of the box respectively; the number of the collection channels and the communication channels is both two, the two communication channels are arranged oppositely and in communication with the two ends of the plurality of receiving channels respectively; the two collection channels are arranged on the opposite sides of the foamed filler respectively and in communication with the two communication channels respectively.

[0018] Embodiments of the present disclosure also provide a battery manufacturing method configured to manufacture the battery pack described above, the box comprising a main body part and a box cover, the accommodation space being arranged inside the main body part, and the box cover being connected to the main body part to cover the accommodation space, the battery manufacturing method comprising:

[0019] In the case that the battery module with the mold is arranged in the accommodation space, the foamed filler is poured into the accommodation space; wherein the mold is configured to form the smoke exhaust channel;

[0020] Before the foamed filler is completely foamed, the box cover is assembled on the main body part to compress the mold;

[0021] After the foamed filler is completely foamed, the mold is taken out by opening the box cover.

[0022] Optionally, before the step of pouring the foamed filler into the accommodation space in the case that the battery module with the mold is arranged in the accommodation space, the battery manufacturing method further comprises:

[0023] Before the battery module is arranged in the accommodation space, the mold is adhered to the battery module.

[0024] Optionally, before the step of pouring the foaming filler into the accommodating space after the battery module is accommodated in the accommodating space, the battery manufacturing method further comprises:

[0025] After the battery module is accommodated in the accommodating space, the mold is adhered to the battery module.

[0026] The embodiment of the present disclosure further provides a mold applied to the battery manufacturing method, the mold comprising a collecting part and a receiving part, the receiving part being in a strip shape, and the collecting part being arranged at an end of the receiving part; when the mold is arranged on the battery module, the receiving part corresponds to the plurality of second explosion-proof valves, and the collecting part corresponds to the first explosion-proof valve.

[0027] Optionally, a first channel is arranged on the collecting part, a second channel is arranged on the receiving part, and the first channel and the second channel are communicated; a first through hole is further arranged on the collecting part, and the first through hole corresponds to the first explosion-proof valve; a plurality of second through holes are further arranged on the receiving part, and the plurality of second through holes respectively correspond to the plurality of second explosion-proof valves.

[0028] Optionally, the plurality of battery cells are arranged to form a plurality of battery cell groups; the receiving part is a plurality of receiving parts, the plurality of receiving parts respectively correspond to the plurality of battery cell groups, and the plurality of second explosion-proof valves in each battery cell group correspond to the receiving part; the mold further comprises a connecting part, the plurality of receiving parts are connected as a whole through the connecting part, and the collecting part is connected to the connecting part.

[0029] Optionally, the number of the collecting part and the connecting part is both two, the two connecting parts are oppositely arranged and respectively connected to two ends of the plurality of receiving parts, and the two collecting parts are respectively arranged at two ends of one of the receiving parts and respectively connected to the two connecting parts.

[0030] Optionally, the mold is made of a hard insulating fireproof material.

[0031] Optionally, the mold is made of a PC sheet or a mica plate.

[0032] The beneficial effects of the embodiment of the present disclosure include:

[0033] The battery pack provided by the embodiments of the present disclosure realizes the filling of the gap between the battery module and the inner wall of the box through the foamed filler, and the overall mass of the foamed filler is lower than that of the structural adhesive used in the related art, which is conducive to improving the energy density of the battery pack. Moreover, the foamed filler has high strength and bonding strength, and also has good anti-vibration performance, which can effectively improve the overall strength of the battery pack. At the same time, through the smoke exhaust channel formed on the foamed filler, when any one of the battery cells in the battery module has thermal runaway, the high-temperature substances sprayed by the battery cell can be discharged through the smoke exhaust channel and the first explosion-proof valve. On the one hand, it can avoid the spread of thermal runaway; on the other hand, it can quickly discharge the high-temperature substances, quickly relieve the thermal runaway situation, and is conducive to improving the safety performance of the battery pack.

[0034] The battery manufacturing method provided by the embodiments of the present disclosure is configured to manufacture the battery pack described above, and the battery pack formed thereby can achieve the purposes of improving the energy density of the battery and improving the safety performance of the battery, which will not be described herein again.

[0035] The mold provided by the embodiments of the present disclosure can be applied to the battery manufacturing method described above to be configured to manufacture the battery pack described above, so as to achieve the purposes of improving the energy density of the battery and improving the safety performance of the battery, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0037] FIG. 1 is an exploded structural schematic view of a mold filled in a battery pack provided by the embodiments of the present disclosure;

[0038] FIG. 2 is a cross-sectional structural schematic view of a battery pack provided by the embodiments of the present disclosure;

[0039] FIG. 3 is a flowchart of a battery manufacturing method provided by the embodiments of the present disclosure;

[0040] FIG. 4 is a structural schematic view of a mold provided by the embodiments of the present disclosure.

[0041] Icon: 10-battery pack; 100-box body; 110-main body part; 111-accommodation space; 112-first explosion-proof valve; 120-box cover; 200-battery module; 210-battery cell; 211-battery cell group; 212-second explosion-proof valve; 300-foamed filler; 310-exhaust passage; 311-converging passage; 312-communicating passage; 313-receiving passage; 400-mold; 410-converging part; 411-first passage; 412-first through hole; 420-receiving part; 421-second passage; 422-second through hole; 430-connecting part. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will be combined with the accompanying drawings for the embodiments of the present disclosure to make a clear and complete description of the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but only represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present disclosure.

[0044] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the present disclosure, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present disclosure is usually placed, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present disclosure.

[0046] In addition, if the terms "first", "second", and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] It should be noted that the features in the embodiments of the present disclosure can be combined with each other without conflict.

[0048] As described in the background, with the popularization of new energy, the application scenarios of batteries are more and more extensive, and the requirements for the energy density, safety performance, overall strength and anti-vibration performance of the batteries are higher and higher.

[0049] The inventor has found that in the related art, after the battery module inside the battery is installed, structural glue needs to be filled into the inside of the battery to fill the internal space of the battery. However, the method of filling structural glue not only affects the energy density of the battery, but also affects the smoke exhaust performance of the battery in the case of thermal runaway, thereby reducing the safety performance of the battery.

[0050] Referring to FIG. 1, a battery pack 10 is provided in the embodiment, which can be configured to store electrical energy and deliver electrical energy to an electrical device when the electrical device is connected. In the embodiment, the battery pack 10 can improve the technical problems of low battery energy density and low safety performance in the related art, that is, the battery pack 10 can achieve the purposes of improving the battery energy density and improving the safety performance of the battery.

[0051] In the embodiment, referring to FIGS. 1 and 2, the battery pack 10 includes a box body 100, a battery module 200 and a foamed filler 300. The box body 100 has an accommodation space 111 inside, and a first explosion-proof valve 112 is arranged on one side wall of the box body 100. In the embodiment, the box body 100 includes a main body part 110 and a box cover 120, the accommodation space 111 is arranged inside the main body part 110, and the box cover 120 is connected to the main body part 110 to cover the accommodation space 111. In the embodiment, the first explosion-proof valve 112 is arranged on one side wall of the main body part 110. The battery module 200 is formed by arranging a plurality of battery cells 210, and each battery cell 210 is provided with a second explosion-proof valve 212; the battery module 200 is arranged inside the accommodation space 111. The plurality of battery cells 210 can be arranged to form a plurality of battery cell groups 211, and of course, the plurality of battery cells 210 can only form one battery cell group 211. The foamed filler 300 is filled between the battery module 200 and the inner wall of the box body 100; the foamed filler 300 forms a smoke exhaust channel 310, the outlet of the smoke exhaust channel 310 corresponds to the first explosion-proof valve 112, and the plurality of second explosion-proof valves 212 correspond to the smoke exhaust channel 310.

[0052] It is worth noting that the foamed filler 300 can be poured into the inside of the box body 100 when the battery module 200 is loaded into the accommodation space 111, so as to achieve the filling of the gap between the battery module 200 and the inner wall of the box body 100 through the foaming action of the foamed filler 300. Of course, in order to form the smoke exhaust channel 310 on the foamed filler 300, a mold 400 can be arranged on the battery module 200 to facilitate the formation of the smoke exhaust channel 310 on the top of the battery module 200.

[0053] As described above, in the battery pack 10, the gap between the battery module 200 and the inner wall of the box body 100 is filled by the foamed filler 300. Compared with the structural adhesive used in the related art, the foamed filler 300 has a lower overall mass, which is beneficial to improve the energy density of the battery pack 10. Moreover, the foamed filler 300 has high strength and bonding strength, and also has good vibration resistance, which can effectively improve the overall strength of the battery pack 10. At the same time, through the smoke exhaust channel 310 formed on the foamed filler 300, when any one of the battery cells 210 in the battery module 200 has thermal runaway, the high-temperature substances sprayed out of the battery cell 210 can be discharged through the smoke exhaust channel 310 and the first explosion-proof valve 112. On the one hand, the thermal runaway can be prevented from spreading. On the other hand, the high-temperature substances can be quickly discharged, and the thermal runaway can be quickly relieved, which is beneficial to improve the safety performance of the battery pack 10.

[0054] Optionally, in the embodiment, the foamed filler 300 is a flame-retardant foamed polyurethane adhesive. The use of the flame-retardant foamed polyurethane adhesive can quickly complete pressure relief and exhaust when the battery cell 210 has thermal runaway, thereby improving the safety performance of the battery pack 10. On the other hand, the flame-retardant foamed polyurethane adhesive has a certain anti-arcing effect, which can prevent the battery cell 210 from igniting the combustible gas sprayed out of the high-pressure arcing point when the battery cell 210 has thermal runaway, thereby further improving the safety performance of the battery pack 10.

[0055] It should be understood that in other embodiments of the present disclosure, the foamed filler 300 can also use other flame-retardant foamed adhesives.

[0056] In the embodiment, the smoke exhaust channel 310 includes a collection channel 311 and a receiving channel 313, and the receiving channel 313 communicates with the collection channel 311. The plurality of second explosion-proof valves 212 correspond to the receiving channel 313, and the collection channel 311 corresponds to the first explosion-proof valve 112. The collection channel 311 is arranged on the side of the foamed filler 300 close to the side wall of the box body 100. When one of the battery cells 210 in the battery module 200 has thermal runaway and sprays out high-temperature substances, the high-temperature substances are sprayed out through the second explosion-proof valve 212 and then introduced into the receiving channel 313. Under the guidance of the receiving channel 313, the high-temperature substances are collected in the collection channel 311 and then sprayed out through the first explosion-proof valve 112.

[0057] Optionally, in some embodiments, the plurality of battery cells 210 are arranged to form a plurality of battery cell groups 211. Based on this, the receiving passages 313 are also a plurality, and the plurality of receiving passages 313 correspond to the plurality of battery cell groups 211 respectively, and the plurality of second explosion-proof valves 212 in each battery cell group 211 correspond to the corresponding receiving passage 313. The smoke exhaust passage 310 further comprises a communication passage 312, and the plurality of receiving passages 313 are communicated through the communication passage 312. By corresponding the plurality of receiving passages 313 to the plurality of battery cell groups 211, it can be ensured that when any one of the battery cells 210 occurs thermal runaway, the high-temperature substances sprayed out can be quickly discharged through the first explosion-proof valve 112.

[0058] Notably, the plurality of receiving passages 313 are communicated through the communication passage 312, based on which, only one first explosion-proof valve 112 can be provided to complete the collection of high-temperature substances in the plurality of receiving passages 313, which can reduce the manufacturing cost of the battery pack 10.

[0059] It should be noted that in other embodiments, the number of first explosion-proof valves 112 can also be two, and the two first explosion-proof valves 112 are arranged on the opposite two side walls of the box body 100. Correspondingly, the number of collection passages 311 and communication passages 312 is also two, and the two communication passages 312 are oppositely arranged and respectively communicated with the two ends of the plurality of receiving passages 313. The two collection passages 311 are respectively arranged on the opposite two sides of the foaming filler 300 and respectively communicated with the two communication passages 312. In this way, the flow path of the high-temperature substances sprayed out by the battery cells 210 can be shortened, so that the high-temperature substances are quickly discharged, further improving the safety of the battery pack 10.

[0060] In addition, in the present embodiment, the communication passage 312 is arranged at the end of the plurality of receiving passages 313, and the collection passage 311 is communicated with the communication passage 312 to communicate with the plurality of receiving passages 313. In the case that thermal runaway occurs in the plurality of receiving passages 313, the high-temperature substances in the plurality of receiving passages 313 are first collected to the communication passage 312, and then introduced from the communication passage 312 to the collection passage 311, and then discharged from the collection passage 311. By arranging the communication passage 312 at the end of the plurality of receiving passages 313, and communicating the collection passage 311 with the communication passage 312, the flow paths of the high-temperature substances in the plurality of receiving passages 313 can be made substantially the same, which is conducive to the rapid collection and discharge of the high-temperature substances in the plurality of receiving passages 313, and improves the safety of the battery pack 10.

[0061] In summary, in the battery pack 10 provided in the embodiment, the gap between the battery module 200 and the inner wall of the box 100 is filled by the foamed filler 300. Compared with the structural adhesive used in the related art, the overall mass of the foamed filler 300 is lower, which is conducive to improving the energy density of the battery pack 10. Moreover, the foamed filler 300 has high strength and bonding strength and also has good vibration resistance, which can effectively improve the overall strength of the battery pack 10. At the same time, through the smoke exhaust channel 310 formed on the foamed filler 300, when thermal runaway occurs in any one of the battery cells 210 in the battery module 200, the high-temperature substances sprayed out of the battery cell 210 can be discharged through the smoke exhaust channel 310 and the first explosion-proof valve 112. On the one hand, it can avoid the spread of thermal runaway; on the other hand, it can quickly discharge the high-temperature substances and quickly relieve the thermal runaway condition, which is conducive to improving the safety performance of the battery pack 10. The use of the flame-retardant foamed polyurethane adhesive can quickly complete pressure relief and exhaust when the battery cell 210 is in thermal runaway, thereby improving the safety of the battery pack 10. On the other hand, the flame-retardant foamed polyurethane adhesive has a certain anti-arcing effect, which can avoid the case that the battery cell 210 ignites the combustible gas sprayed out at the high-voltage arcing point when thermal runaway occurs, thereby further improving the safety performance of the battery pack 10.

[0062] Please refer to FIG. 3, a battery manufacturing method is provided in the embodiment, which is configured to manufacture the battery pack 10 described above, so as to achieve the purpose of improving the energy density of the battery and improving the safety performance of the battery.

[0063] In the embodiment, the battery manufacturing method comprises:

[0064] S1, in the case that the battery module 200 provided with the mold 400 is loaded into the accommodation space 111, the foamed filler 300 is poured into the accommodation space 111.

[0065] The mold 400 is configured to form the smoke exhaust channel 310. That is to say, the mold 400 is arranged on the battery module 200, and after the foamed filler 300 is filled, the smoke exhaust channel 310 can be formed at the position of the mold 400, and the smoke exhaust channel 310 corresponds to the second explosion-proof valve 212 and the first explosion-proof valve 112.

[0066] It is worth noting that the mold 400 can be bonded to the battery module 200 before the battery module 200 is loaded into the accommodation space 111. Of course, the mold 400 can also be assembled to the battery module 200 after the battery module 200 is loaded into the accommodation space 111.

[0067] That is to say, in the embodiment, before step S1, the battery manufacturing method further comprises:

[0068] Step S0, before the battery module 200 is loaded into the accommodating space 111, the mold 400 is adhered to the battery module 200.

[0069] Of course, in other embodiments, before step S1, the battery manufacturing method further comprises:

[0070] Step S0, after the battery module 200 is loaded into the accommodating space 111, the mold 400 is adhered to the battery module 200.

[0071] In addition, when the pouring of the foamed filler 300 is performed, the box cover 120 is not assembled to the main body part 110, which facilitates the pouring of the foamed filler 300. Moreover, the foamed filler 300 is poured from the bottom of the battery module 200, which facilitates the foamed filler 300 to completely fill the gap between the battery module 200 and the inner wall of the box body 100.

[0072] S2, before the foamed filler 300 is completely foamed, the box cover 120 is assembled to the main body part 110 to press the mold 400.

[0073] Before the foamed filler 300 is completely foamed, the box cover 120 is assembled to the main body part 110, at this time, the foamed filler 300 has not completely filled the entire accommodating space 111, the installation difficulty of the box cover 120 is lower, and the problem that the mold 400 is pushed out by the foamed filler 300 during the foaming process to cause the position of the smoke exhaust channel 310 to be incorrect can be avoided. At the same time, after the foaming is completed and the mold 400 is removed, it can be ensured that the box body 100 and the foamed filler 300 are in full contact, and the generation of the gap is prevented.

[0074] S3, after the foamed filler 300 is completely foamed, the box cover 120 is opened to remove the mold 400.

[0075] Of course, after the mold 400 is removed, the box cover 120 is assembled to the main body part 110, so as to seal the accommodating space 111 by the box cover 120.

[0076] The battery manufacturing method provided in the embodiment can manufacture the battery pack 10 described above, and can ensure that the foamed filler 300 completely fills the accommodating space 111, and prevent the generation of the gap. By assembling the box cover 120 before the complete foaming, the mold 400 can be prevented from being pushed out, the success rate of forming the smoke exhaust channel 310 is improved, and the manufacturing efficiency is improved.

[0077] Please refer to FIG. 4, in the embodiment, a mold 400 is provided, which is applied to the battery manufacturing method described above, and is configured to manufacture the battery pack 10 described above.

[0078] In the embodiment, the mold 400 comprises a collecting portion 410 and a receiving portion 420, the receiving portion 420 is in the shape of a strip, and the collecting portion 410 is arranged at the end of the receiving portion 420. When the mold 400 is mounted on the battery module 200, the receiving portion 420 corresponds to the plurality of second explosion-proof valves 212, and the collecting portion 410 corresponds to the first explosion-proof valve 112.

[0079] That is, the collecting portion 410 corresponds to the collecting channel 311, and the receiving portion 420 corresponds to the receiving channel 313. After the foamed filler 300 is completely foamed and the mold 400 is taken out, the position of the collecting portion 410 forms the collecting channel 311, and the position of the receiving portion 420 forms the receiving channel 313.

[0080] Optionally, a first channel 411 is arranged on the collecting portion 410, a second channel 421 is arranged on the receiving portion 420, and the first channel 411 and the second channel 421 are communicated. A first through hole 412 is further arranged on the collecting portion 410, and the first through hole 412 corresponds to the first explosion-proof valve 112. A plurality of second through holes 422 are further arranged on the receiving portion 420, and the plurality of second through holes 422 correspond to the plurality of second explosion-proof valves 212, respectively.

[0081] By arranging the first channel 411 and the first through hole 412 on the collecting portion 410, and arranging the second channel 421 and the second through hole 422 on the receiving portion 420, the first through hole 412 can correspond to the first explosion-proof valve 112, and the second through hole 422 can correspond to the second explosion-proof valve 212, so as to realize the positioning of the mold 400, improve the accuracy of the mounting position of the mold 400 on the battery module 200, and ensure the yield of the smoke exhaust channel 310.

[0082] In addition, the first through hole 412 and the second through hole 422 can also avoid the first explosion-proof valve 112 and the second explosion-proof valve 212, so as to prevent the first explosion-proof valve 112 and the second explosion-proof valve 212 from being damaged.

[0083] Optionally, in order to adapt to the plurality of cell groups 211 in the battery module 200, the receiving portion 420 is in plurality, the plurality of receiving portions 420 correspond to the plurality of cell groups 211, respectively, and the plurality of second explosion-proof valves 212 in each cell group 211 correspond to the receiving portion 420. The mold 400 further comprises a connecting portion 430, the plurality of receiving portions 420 are connected as a whole through the connecting portion 430, and the collecting portion 410 is connected to the connecting portion 430. After the foamed filler 300 is completely foamed and the mold 400 is taken out, the position of the connecting portion 430 forms the communicating channel 312.

[0084] It should be noted that in other embodiments, when the number of the first explosion-proof valves 112 is two, the number of the corresponding collecting portions 410 and the connecting portions 430 is also two, the two connecting portions 430 are oppositely arranged and connected with two ends of the plurality of receiving portions 420 respectively, and the two collecting portions 410 are arranged at two ends of one of the receiving portions 420 respectively and connected with the two connecting portions 430 respectively. In this way, after the foaming filler 300 is completely foamed and the mold 400 is taken out, the positions of the two collecting portions 410 correspond to the two collecting channels 311 respectively, and the positions of the two connecting portions 430 correspond to the two communicating channels 312 respectively.

[0085] Optionally, the mold 400 is made of a hard insulating fireproof material. For example, the mold 400 can be made of a PC sheet or a mica plate.

[0086] In summary, the mold 400 provided in the embodiments of the present disclosure can be applied to the battery manufacturing method described above to accurately form the smoke exhaust channel 310 and improve the overall safety performance of the manufactured battery pack 10.

[0087] The above merely describes specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed by the present disclosure can be easily conceived by those skilled in the art, and should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims. Industrial applicability

[0088] In summary, the embodiments of the present disclosure provide a battery pack, a battery manufacturing method and a mold, which can improve the energy density of the battery and improve the safety performance of the battery.

Claims

1. A battery pack, characterized by, The application relates to a battery manufacturing method and a battery. The battery comprises: a box (100) with a containing space (111) in the box (100), and a first explosion-proof valve (112) arranged on one side wall of the box (100); a battery module (200) formed by arranging a plurality of battery cells (210), and a second explosion-proof valve (212) arranged on each battery cell (210); the battery module (200) is arranged in the containing space (111); 2. The battery pack of claim 1, wherein, a foamed filling piece (300) filled between the battery module (200) and the inner wall of the box (100); the foamed filling piece (300) is provided with a smoke exhaust channel (310), the outlet of the smoke exhaust channel (310) corresponds to the first explosion-proof valve (112), and a plurality of the second explosion-proof valves (212) correspond to the smoke exhaust channel (310).

3. The battery pack of claim 1 or 2, wherein, The foamed filling piece (300) is a flame-retardant foamed polyurethane adhesive.

4. The battery pack of claim 3, wherein, The smoke exhaust channel (310) comprises a collecting channel (311) and a receiving channel (313), the receiving channel (313) communicates with the collecting channel (311), a plurality of the second explosion-proof valves (212) correspond to the receiving channel (313), the collecting channel (311) corresponds to the first explosion-proof valve (112), and the collecting channel (311) is arranged on one side of the foamed filling piece (300) close to the side wall of the box (100).

5. The battery pack of claim 4, wherein, A plurality of the battery cells (210) are arranged to form a plurality of battery cell groups (211); the receiving channel (313) is provided in plurality, a plurality of the receiving channels (313) correspond to a plurality of the battery cell groups (211) respectively, a plurality of the second explosion-proof valves (212) in each battery cell group (211) correspond to the corresponding receiving channel (313), and the smoke exhaust channel (310) further comprises a communication channel (312), and a plurality of the receiving channels (313) communicate through the communication channel (312).

6. The battery pack of claim 4 or 5, wherein, The communication channel (312) is arranged at the end of a plurality of the receiving channels (313), and the collecting channel (311) communicates with the communication channel (312) to communicate with a plurality of the receiving channels (313).

7. A method of manufacturing a battery pack (10) configured to manufacture the battery pack (10) according to any one of claims 1 to 6, the case (100) including a main body portion (110) and a case cover (120), the accommodation space (111) being provided inside the main body portion (110), the case cover (120) being attached to the main body portion (110) to cover the accommodation space (111), characterized in that, The number of the first explosion-proof valves (112) is two, and the two first explosion-proof valves (112) are arranged on the opposite side walls of the box (100) respectively; the number of the collecting channels (311) and the communication channels (312) is both two, the two communication channels (312) are arranged oppositely and communicate with the two ends of a plurality of the receiving channels (313) respectively, and the two collecting channels (311) are arranged on the opposite sides of the foamed filling piece (300) and communicate with the two communication channels (312) respectively. The battery manufacturing method comprises: in the case that the battery module (200) provided with a mold (400) is arranged in the containing space (111), the foamed filling piece (300) is poured into the containing space (111); wherein the mold (400) is configured to form the smoke exhaust channel (310). Assembling the box cover (120) to the main body part (110) to compress the mold (400) before the foaming filler (300) is completely foamed; Opening the box cover (120) to take out the mold (400) after the foaming filler (300) is completely foamed.

8. The battery production method according to claim 7, wherein Before the step of pouring the foaming filler (300) into the containing space (111) with the battery module (200) with the mold (400) assembled in the containing space (111), the battery manufacturing method further comprises: Before the battery module (200) is assembled in the containing space (111), bonding the mold (400) to the battery module (200).

9. The battery production method according to claim 7, wherein Before the step of pouring the foaming filler (300) into the containing space (111) with the battery module (200) with the mold (400) assembled in the containing space (111), the battery manufacturing method further comprises: After the battery module (200) is assembled in the containing space (111), bonding the mold (400) to the battery module (200).

10. A mold used in the method of claim 7 to 9, characterized in that, The mold (400) comprises a collecting part (410) and a receiving part (420), the receiving part (420) is in an elongated strip shape, and the collecting part (410) is arranged at an end of the receiving part (420); when the mold (400) is assembled on the battery module (200), the receiving part (420) corresponds to a plurality of the second explosion-proof valves (212), and the collecting part (410) corresponds to the first explosion-proof valve (112).

11. The mold of claim 10, wherein, A first passage (411) is arranged on the collecting part (410), a second passage (421) is arranged on the receiving part (420), and the first passage (411) and the second passage (421) are in communication; a first through hole (412) is further arranged on the collecting part (410), and the first through hole (412) corresponds to the first explosion-proof valve (112); a plurality of second through holes (422) are further arranged on the receiving part (420), and the plurality of second through holes (422) respectively correspond to the plurality of second explosion-proof valves (212).

12. The mold according to claim 10 or 11, characterized in that A plurality of the battery cells (210) are arranged to form a plurality of battery cell groups (211); the receiving part (420) is in a plurality, and the plurality of receiving parts (420) respectively correspond to the plurality of battery cell groups (211), and the plurality of second explosion-proof valves (212) in each of the battery cell groups (211) correspond to the receiving part (420); the mold (400) further comprises a connecting part (430), and the plurality of receiving parts (420) are connected as a whole through the connecting part (430), and the collecting part (410) is connected to the connecting part (430).

13. The mold of claim 12, wherein, The number of the collecting parts (410) and the connecting parts (430) is two, the two connecting parts (430) are oppositely arranged and connected with two ends of the receiving parts (420) respectively, and the two collecting parts (410) are arranged at two ends of one of the receiving parts (420) respectively and connected with the two connecting parts (430) respectively.

14. The mold according to any one of claims 10-13, characterized in that, The mold (400) is made of hard insulating fireproof material.

15. The mold according to any one of claims 10-14, characterized in that, The mold (400) is made of PC sheet or mica plate.

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