Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, and relates to the technical field of batteries. The battery pack comprises a shell, at least one partition plate and at least two battery cell units, a containing cavity is formed in the shell, the partition plates are located in the shell to divide the containing cavity into at least two sub-containing cavities, the battery cell units are located in the sub-containing cavities in a one-to-one correspondence mode, exhaust ports are formed in the battery cell units, and the exhaust ports are communicated with inner cavities of the battery cell units; the shell is provided with at least two exhaust channels capable of being opened and closed, the exhaust channels are correspondingly communicated with the sub-containing cavities, and the exhaust channels are configured to be communicated with the exhaust port and the exterior of the shell when the corresponding battery cell units are subjected to thermal runaway, so that thermal runaway gas generated by the battery cell units is exhausted out of the shell. According to the battery pack provided by the embodiment of the invention, when part of the battery cell units are subjected to thermal runaway, generated thermal runaway gas can be exhausted through the corresponding exhaust channels, so that thermal runaway of other battery cell units is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack and an electrical device. Background Art

[0002] A plurality of battery cells are arranged in the battery pack. During the use of the battery pack, due to overcharging, over-discharging, short circuit and other reasons, the battery cells in the battery pack undergo thermal runaway, generating a large amount of high-temperature combustible thermal runaway gas, resulting in serious consequences such as explosion and fire of the battery pack.

[0003] In the prior art, an explosion-proof valve is arranged on the battery pack. When the battery cell undergoes thermal runaway, the generated thermal runaway gas is discharged inside the battery pack, causing the pressure inside the battery pack to increase. When the pressure exceeds the set value, the explosion-proof valve will rupture to discharge the thermal runaway gas from the battery pack, thereby reducing the pressure inside the battery and avoiding the occurrence of explosion accidents.

[0004] However, before the explosion-proof valve ruptures, the thermal runaway gas generated by the battery cell is likely to cause thermal runaway of other battery cells inside the battery pack. Summary of the Utility Model

[0005] The present application provides a battery pack and an electrical device to solve the problem that, before the explosion-proof valve ruptures, the thermal runaway gas generated by the battery cell is likely to cause thermal runaway of other battery cells inside the battery pack in the prior art.

[0006] On the one hand, a battery pack provided by the present application includes: a housing, at least one partition and at least two battery cell units;

[0007] The housing has a receiving cavity therein. The partition is located inside the housing to divide the receiving cavity into at least two sub-receiving cavities. The battery cell units are respectively located in the sub-receiving cavities. Each battery cell unit has an exhaust port, and the exhaust port is communicated with the inner cavity of the battery cell unit;

[0008] The housing has at least two openable and closable exhaust channels, and the exhaust channels are correspondingly communicated with the sub-receiving cavities. The exhaust channels are configured to, when the corresponding battery cell unit undergoes thermal runaway, communicate the exhaust port with the outside of the housing to discharge the thermal runaway gas generated by the battery cell unit from the housing.

[0009] In some technical solutions of the above battery pack, it further includes at least two blocking members, and the blocking members are correspondingly located between the exhaust port and the exhaust channel. The blocking members are used to open and close at least one of the exhaust port and the exhaust channel.

[0010] In some technical solutions of the above battery pack, the blocking member is an explosion-proof member.

[0011] In some technical solutions of the above battery pack, the housing includes side plates which are opposite to the exhaust ports. There are at least two exhaust holes on the side plates, and the exhaust holes are correspondingly located at the ends of the exhaust channels.

[0012] In some technical solutions of the above battery pack, it further includes a first limiting member. There are at least two first mounting portions on the side plates, at least two first grooves on the first limiting member, and at least two second grooves on the first mounting portions. The first grooves and the second grooves are correspondingly joined to form the exhaust channels.

[0013] In some technical solutions of the above battery pack, the first limiting member includes at least two first connecting segments and a plurality of second connecting segments. The first connecting segments are located between two adjacent second connecting segments, and the first grooves are located on the first connecting segments;

[0014] There are also a plurality of second mounting portions on the side plates. The first mounting portions are located between two adjacent second mounting portions, and the second connecting segments are connected to the second mounting portions.

[0015] In some technical solutions of the above battery pack, the battery cell unit has a first end face, and there is a convex portion on the first end face. At least part of the convex portion is located in the exhaust channel, and the exhaust port is located on the end face of the convex portion facing the housing.

[0016] In some technical solutions of the above battery pack, it further includes at least one sealing member, and the sealing member is connected between the outer side wall of the convex portion and the inner side wall of the exhaust channel.

[0017] In some technical solutions of the above battery pack, it further includes a second limiting member. The battery cell unit has a second end face opposite to the first end face, and there is a connecting portion on the second end face. The second limiting member connects the connecting portion and the housing.

[0018] In some technical solutions of the above battery pack, the second limiting member includes a connecting plate and at least two limiting portions arranged on the connecting plate. The limiting portions are correspondingly lapped on the connecting portion, and the connecting plate is connected to the housing.

[0019] In some technical solutions of the above battery pack, the battery cell unit has two pole posts, and the pole posts are located on the second end face.

[0020] In some technical solutions of the above battery pack, the battery cell unit has an openable and closable sampling port, and the sampling port is located on the second end face.

[0021] In some technical solutions of the above battery pack, the housing is provided with an openable and closable maintenance window, and the maintenance window is communicated with each of the sub-accommodation cavities.

[0022] In some technical solutions of the above battery pack, the partition is a heat insulation board.

[0023] In some technical solutions of the above battery pack, an insulating layer is provided between the sub-accommodation cavity and the battery cell unit, and the insulating layer is connected to the partition.

[0024] On the other hand, the present application provides an electrical device, including a device body and any one of the above battery packs provided on the device body.

[0025] A battery pack and an electrical device provided by the present application. The battery pack includes: a housing, at least one partition, and at least two battery cell units. The housing has an accommodation cavity, the partition is located inside the housing to divide the accommodation cavity into at least two sub-accommodation cavities, and the battery cell units are respectively located in the sub-accommodation cavities. Thus, when some of the battery cell units have a thermal runaway, the thermal runaway gas generated is isolated in the corresponding sub-accommodation cavity and will not flow to the sub-accommodation cavity corresponding to other battery cell units, preventing the thermal runaway gas from contacting other battery cell units, thereby avoiding causing thermal runaway of other battery cell units. The battery cell unit has an exhaust port, and the exhaust port is communicated with the inner cavity of the battery cell unit. The housing has at least two openable and closable exhaust channels, and the exhaust channels are correspondingly communicated with the sub-accommodation cavities. The exhaust channels are configured to, when the corresponding battery cell unit has a thermal runaway, communicate the exhaust port with the outside of the housing to allow the thermal runaway gas generated by the battery cell unit to be discharged from the housing. Thus, it is possible to avoid the accumulation of too much thermal runaway gas in the sub-accommodation cavity, which may cause the battery cell unit in the sub-accommodation cavity to explode, thereby avoiding the explosion of the battery pack. At the same time, the exhaust port and the exhaust channel correspond to each other to avoid the influence of the discharged thermal runaway gas on other battery cell units. Description of the Drawings

[0026] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0027] Figure 1 It is a schematic structural diagram of the battery pack provided by the embodiment of the present application;

[0028] Figure 2 It is Figure 1 a schematic structural diagram of another perspective;

[0029] Figure 3 It is Figure 1 a schematic structural diagram of still another perspective;

[0030] Figure 4 It is Figure 3 a cross-sectional view taken along A-A in

[0031] Figure 5 is Figure 4 an enlarged schematic view of part B in

[0032] Figure 6 is Figure 4 an enlarged schematic view of part C in

[0033] Figure 7 is Figure 1 a schematic view of the structure with part of the housing removed;

[0034] Figure 8 is Figure 7 a schematic view of part of the housing in

[0035] Figure 9 is Figure 8 an enlarged schematic view of part D in

[0036] Figure 10 is Figure 8 a schematic view of another perspective of

[0037] Figure 11 is Figure 10 an enlarged schematic view of part E in

[0038] Figure 12 is Figure 1 a schematic view of the structure with the housing removed;

[0039] Figure 13 is Figure 12 a schematic view of another perspective of

[0040] Figure 14 is Figure 12 a schematic view of the structure of the battery cell and the seal in

[0041] Figure 15 is Figure 14 an enlarged schematic view of part F in

[0042] Figure 16 is Figure 14 an enlarged schematic view of part G in

[0043] Figure 17 is Figure 12 a schematic view of the structure of the first limiting member in

[0044] Figure 18 is Figure 12 a schematic view of the structure of the second limiting member in

[0045] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the inventive concept of the present utility model in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0046] Description of reference numerals:

[0047] 100 - housing; 110 - accommodation cavity; 111 - sub - accommodation cavity; 120 - exhaust passage; 130 - side plate; 131 - exhaust hole; 132 - mating part; 133 - first mounting part; 134 - second groove; 135 - second mounting part; 140 - maintenance window; 150 - baffle

[0048] 200 - partition

[0049] 300 - battery cell unit; 310 - first end face; 311 - protrusion; 312 - exhaust port; 320 - second end face; 321 - connection part; 322 - pole; 323 - sampling port

[0050] 400 - plugging member

[0051] 500 - first limiting member; 510 - first connection segment; 511 - first groove; 520 - second connection segment; 530 - first connecting member

[0052] 600 - second limiting member; 610 - connecting plate; 620 - limiting part

[0053] 700 - sealing member; 710 - first sealing part; 720 - second sealing part; 730 - third sealing part; 800 - bus bar Detailed description of the specific embodiment

[0054] Hereinafter, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0055] In the prior art, an explosion-proof valve is provided on a battery pack. When a battery cell undergoes thermal runaway, the thermally runaway gas generated will be discharged inside the battery pack, causing the pressure inside the battery pack to increase. When the pressure exceeds the set value, the explosion-proof valve will rupture, allowing the thermally runaway gas to escape from the battery pack, thereby reducing the pressure inside the battery and avoiding the occurrence of explosion accidents. However, before the explosion-proof valve ruptures, when the thermally runaway gas generated by a battery cell comes into contact with other battery cells in the battery pack that have not undergone thermal runaway, it will cause the temperature of other battery cells to rise, and thus it is more likely to cause other battery cells in the battery pack to undergo thermal runaway.

[0056] Based on this, an embodiment of the present application provides a battery pack, including: a housing, at least one partition, and at least two battery cell units. The housing has an accommodation cavity inside. The partition is located inside the housing to divide the accommodation cavity into at least two sub-accommodation cavities. The battery cell units are correspondingly located in the sub-accommodation cavities one by one. Thus, when some battery cell units undergo thermal runaway, the thermally runaway gas generated is isolated in the corresponding sub-accommodation cavities and will not flow into the sub-accommodation cavities corresponding to other battery cell units, preventing the thermally runaway gas from coming into contact with other battery cell units, thereby avoiding causing other battery cell units to undergo thermal runaway. Each battery cell unit has an exhaust port, and the exhaust port is communicated with the inner cavity of the battery cell unit. The housing has at least two openable and closable exhaust channels, and the exhaust channels are correspondingly communicated with the sub-accommodation cavities. The exhaust channels are configured to, when the corresponding battery cell unit undergoes thermal runaway, communicate the exhaust port with the outside of the housing to allow the thermally runaway gas generated by the battery cell unit to escape from the housing. Thereby, it is possible to avoid the accumulation of too much thermally runaway gas in the sub-accommodation cavity, which may cause the battery cell units in the sub-accommodation cavity to explode, and thus avoid the explosion of the battery pack. At the same time, the exhaust ports and the exhaust channels correspond to each other one by one to avoid the thermally runaway gas affecting other battery cell units when escaping.

[0057] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0058] Refer to Figures 1 to 16 As shown in the figure, a battery pack provided by an embodiment of the present application includes: a housing 100, at least one partition 200, and at least two battery cell units 300. The housing 100 has an accommodation cavity 110 inside. The partition 200 is located inside the housing 100 to divide the accommodation cavity 110 into at least two sub-accommodation cavities 111. The battery cell units 300 are correspondingly located in the sub-accommodation cavities 111 one by one. Each battery cell unit 300 has an exhaust port 312, and the exhaust port 312 is communicated with the inner cavity of the battery cell unit 300.

[0059] The housing 100 has at least two openable and closable exhaust channels 120. The exhaust channels 120 are correspondingly communicated with the sub-accommodation cavities 111. The exhaust channels 120 are configured to, when the corresponding battery cell unit 300 undergoes thermal runaway, communicate the exhaust port 312 with the outside of the housing 100 to allow the thermally runaway gas generated by the battery cell unit 300 to escape from the housing 100.

[0060] Among them, when the battery cell unit 300 undergoes thermal runaway, a large amount of thermal runaway gas will be generated in the inner cavity of the battery cell unit 300. The exhaust port 312 is communicated with the inner cavity of the battery cell unit 300, so that the thermal runaway gas can be discharged from the battery cell unit 300 through the exhaust port 312.

[0061] Exemplarily, the housing 100 is used to support each battery cell unit 300, and the length of the housing 100 is greater than or equal to 600 mm. When the length of the housing 100 is relatively long, the structural strength of the housing 100 is relatively high. The partition 200 is connected to the housing 100. The number of partitions 200 can be set according to the number of battery cell units 300. When the number of partitions 200 is at least two, the partitions 200 are parallel to each other.

[0062] Specifically, the exhaust channels 120 correspond to the exhaust ports 312 one by one. When the battery cell unit 300 does not undergo thermal runaway, the exhaust channels 120 are closed. When one of the battery cell units 300 undergoes thermal runaway, the thermal runaway gas generated by the battery cell unit 300 is discharged through the exhaust port 312 of the battery cell unit 300. At this time, the exhaust channel 120 corresponding to the exhaust port 312 is opened to communicate the exhaust port 312 with the outside of the housing 100, so that the thermal runaway gas generated by the battery cell unit 300 can be discharged from the housing 100 through the exhaust port 312 and the exhaust channel 120 in sequence, avoiding the contact between the thermal runaway gas and other battery cell units 300, and thus reducing the influence on other battery cell units 300.

[0063] The battery pack provided by the embodiment of the present application divides the accommodation cavity 110 into at least two sub-accommodation cavities 111 by arranging at least one partition 200 in the accommodation cavity 110, and the battery cell units 300 are correspondingly located in the sub-accommodation cavities 111 one by one. Thus, when some of the battery cell units 300 undergo thermal runaway, the generated thermal runaway gas is isolated in the corresponding sub-accommodation cavity 111 and will not flow to the sub-accommodation cavity 111 corresponding to other battery cell units 300, preventing the thermal runaway gas from contacting other battery cell units 300, thereby avoiding causing thermal runaway of other battery cell units 300. By providing an exhaust port 312 on the battery cell unit 300 and an exhaust channel 120 corresponding to the sub-accommodation cavity 111 and communicated with the housing 100, when the battery cell unit 300 undergoes thermal runaway, the exhaust channel 120 communicates the exhaust port 312 with the outside of the housing 100, so that the thermal runaway gas generated by the battery cell unit 300 can be directly discharged from the housing 100, avoiding explosion of the battery cell units 300 in the sub-accommodation cavity 111 due to excessive accumulation of thermal runaway gas in the sub-accommodation cavity 111, and thus avoiding explosion of the battery pack. At the same time, the exhaust port 312 and the exhaust channel 120 correspond to each other one by one to avoid the influence on other battery cell units 300 when the thermal runaway gas is discharged.

[0064] Refer to Figure 6 and Figure 9, in some embodiments, the battery pack provided by the embodiments of the present application further includes at least two blocking members 400, and the blocking members 400 are correspondingly located between the exhaust ports 312 and the exhaust passage 120. The blocking members 400 are used to open and close at least one of the exhaust ports 312 and the exhaust passage 120.

[0065] Wherein, when the blocking member 400 is used to open and close the exhaust port 312, the blocking member 400 can be disposed inside the exhaust port 312 to close or open the exhaust port 312. The blocking member 400 can also be disposed on one side of the exhaust port 312 to block or open the exhaust port 312.

[0066] When the blocking member 400 is used to open and close the exhaust passage 120, the blocking member 400 is located inside the exhaust passage 120.

[0067] Specifically, when the battery cell unit 300 does not undergo thermal runaway, the blocking member 400 corresponding to the battery cell unit 300 closes at least one of the exhaust port 312 and the exhaust passage 120, so that the sub-accommodation cavity 111 corresponding to the battery cell unit 300 is in a closed state and not communicated with the outside of the housing 100. When the battery cell unit 300 undergoes thermal runaway, the blocking member 400 corresponding to the battery cell unit 300 opens at least one of the exhaust port 312 and the exhaust passage 120 to communicate the exhaust port 312 and the outside of the housing 100 through the exhaust passage 120.

[0068] In a specific implementation, the blocking member 400 is an explosion-proof member.

[0069] Wherein, when the battery cell unit 300 undergoes thermal runaway, the generated thermal runaway gas is discharged through the exhaust port 312, thereby increasing the air pressure between the exhaust port 312 and the exhaust passage 120. When the air pressure between the exhaust port 312 and the exhaust passage 120 reaches a preset air pressure, the explosion-proof member is detonated, so that the exhaust passage 120 is communicated with the exhaust port 312.

[0070] Exemplarily, the explosion-proof member is an explosion-proof valve or an explosion-proof film. The explosion-proof member can cover one side of the exhaust port 312, or the explosion-proof member can be disposed inside the exhaust passage 120.

[0071] Referring to Figure 6 、 Figure 9 and Figure 11 , in some embodiments, the housing 100 includes a side plate 130. The side plate 130 faces each exhaust port 312, and at least two exhaust holes 131 are provided on the side plate 130. The exhaust holes 131 are correspondingly located at the ends of the exhaust passage 120.

[0072] Among them, the exhaust holes 131 are in one-to-one correspondence with and communicate with the exhaust passage 120. By providing the exhaust holes 131, the exhaust passage 120 is made to communicate the sub-accommodation cavity 111 with the outside of the side plate 130, that is, to communicate the sub-accommodation cavity 111 with the outside of the housing 100.

[0073] Exemplarily, the blocking member 400 can be provided on the side of the exhaust hole 131 facing the exhaust port 312.

[0074] Referring to Figure 1 、 Figure 6 and Figure 9 In some embodiments, the battery pack provided by the embodiments of the present application further includes a first limiting member 500. The side plate 130 further has at least two first mounting portions 133. The first limiting member 500 has at least two first grooves 511. The first mounting portions 133 have at least two second grooves 134. The first grooves 511 and the second grooves 134 are correspondingly combined to form the exhaust passage 120.

[0075] Among them, the first grooves 511 and the second grooves 134 are provided in one-to-one correspondence. By connecting the first limiting member 500 with the first mounting portion 133, the exhaust passage 120 is made relatively stable.

[0076] Exemplarily, both the first grooves 511 and the second grooves 134 are arc-shaped grooves.

[0077] Referring to Figure 6 、 Figure 9 and Figure 17 In a specific implementation, the first limiting member 500 includes at least two first connecting segments 510 and a plurality of second connecting segments 520. The first connecting segments 510 are located between two adjacent second connecting segments 520. The first grooves 511 are located on the first connecting segments 510.

[0078] The side plate 130 further has a plurality of second mounting portions 135. The first mounting portions 133 are located between two adjacent second mounting portions 135. The second connecting segments 520 are connected to the second mounting portions 135.

[0079] Among them, the first limiting member 500 is located above the first mounting portion 133. By connecting the second connecting segments 520 with the second mounting portions 135, the first limiting member 500 is connected to the first mounting portion 133.

[0080] Exemplarily, the connection manner between the second connecting segments 520 and the second mounting portions 135 can be threaded connection, snap connection, pin connection, etc.

[0081] Further, the first limiting member 500 further includes a plurality of first connecting members 530. The first connecting members 530 are connected to the second mounting portions 135 via the second connecting segments 520. In some examples, the first connecting members 530 are screws.

[0082] Referring to Figure 6 and Figure 16 In some embodiments, the battery cell unit 300 has a first end face 310, and a protrusion 311 is provided on the first end face 310. The protrusion 311 is at least partially located in the exhaust passage 120, and the exhaust port 312 is located on the end face of the protrusion 311 facing the housing 100.

[0083] Among them, the first end face 310 faces the side plate 130, the protrusion 311 protrudes toward the side plate 130, and the exhaust port 312 faces the side plate 130, so that the exhaust port 312 communicates with the exhaust hole 131 on the side plate 130. At the same time, the protrusion 311 is located between the first limiting member 500 and the first mounting portion 133, and is connected by the first limiting member 500 and the first mounting portion 133 to limit the protrusion 311 between the first limiting member 500 and the first mounting portion 133, thereby making the battery cell unit 300 more stable.

[0084] By providing the protrusion 311, the protrusion 311 is at least partially located in the exhaust passage 120, so that the thermal runaway gas can be discharged into the exhaust passage 120 through the exhaust port 312, and then it is convenient to discharge the thermal runaway gas.

[0085] Continuing to refer to Figure 6 and Figure 16 In specific implementation, the battery pack provided by the embodiment of the present application further includes at least one seal 700, and the seal 700 is connected between the outer side wall of the protrusion 311 and the inner side wall of the exhaust passage 120.

[0086] Among them, by providing the seal 700, the exhaust passage 120 and the protrusion 311 are sealed, so that the thermal runaway gas generated by the battery cell unit 300 can be discharged through the exhaust port 312 and the exhaust passage 120 in sequence, avoiding the thermal runaway gas flowing between the outer wall of the battery cell unit 300 and the partition 200, and further avoiding affecting other battery cell units 300.

[0087] Specifically, the seal 700 includes a first seal portion 710, a second seal portion 720 and at least one third seal portion 730, and the third seal portion 730 connects the first seal portion 710 and the second seal portion 720. The first seal portion 710 is connected between the protrusion 311 and the groove surface of the second groove 134, and between the protrusion 311 and the first connection section 510.

[0088] The side plate 130 has a matching portion 132, the matching portion 132 is located on the periphery of the exhaust hole 131, and the matching portion 132 protrudes toward the accommodating cavity 110. The second seal portion 720 is connected between the matching portion 132 and the first connection section 510.

[0089] The number of the third sealing parts 730 is two, and the third sealing parts 730 are connected between the first limiting part 500 and the first mounting part 133.

[0090] Furthermore, a first sealing groove for accommodating part of the first sealing part 710 is formed on the groove surface of the second groove 134. A second sealing groove for accommodating part of the second sealing part 720 is formed on the mating part 132.

[0091] Referring to Figure 4 、 Figure 5 and Figure 15 , in some embodiments, the battery pack provided by the embodiment of the present application further includes a second limiting part 600. The battery cell unit 300 has a second end face 320 opposite to the first end face 310. A connecting part 321 is formed on the second end face 320. The second limiting part 600 connects the connecting part 321 and the housing 100.

[0092] Wherein, by providing the second limiting part 600, the connecting part 321 is connected to the housing 100, so that the battery cell unit 300 is relatively stable in the sub-accommodating cavity 111.

[0093] Exemplarily, the connecting part 321 is located at the lower part of the second end face 320.

[0094] Referring to Figure 5 and Figure 18 , in a specific implementation, the second limiting part 600 includes a connecting plate 610 and at least two limiting parts 620 arranged on the connecting plate 610. The limiting parts 620 are correspondingly lapped on the connecting part 321, and the connecting plate 610 is connected to the housing 100.

[0095] Exemplarily, the connection manner between the connecting plate 610 and the housing 100 can be threaded connection, snap connection or pin shaft connection, etc.

[0096] Furthermore, the second limiting part 600 further includes a plurality of second connecting parts. The limiting parts 620 are arranged on the connecting plate 610 at intervals, and the limiting parts 620 are located between two adjacent second connecting parts. The second connecting parts are connected to the housing 100 through the connecting plate 610. In some examples, the second connecting parts are screws.

[0097] Specifically, the connecting part 321 is convex. The limiting part 620 is bent, so as to facilitate the limiting part 620 to be lapped on the connecting part 321, and further limit the connecting part 321.

[0098] In this way, the battery cell unit 300 can be limited in the sub-accommodating cavity 111 by the first limiting part 500 and the second limiting part 600, so as to prevent the battery cell unit 300 from moving in the sub-accommodating cavity 111.

[0099] Referring to Figure 13 、Figure 14 and Figure 15 In specific implementation, the battery cell unit 300 has two pole posts 322, and the pole posts 322 are located on the second end face 320.

[0100] Among them, the two pole posts 322 are respectively a positive pole post and a negative pole post, and the two pole posts are arranged in the middle area of the second end face 320 in the same row.

[0101] Specifically, the battery pack provided by the embodiment of the present application further includes at least one bus bar 800, and the bus bar 800 connects the positive pole post on one battery cell unit 300 and the negative pole post on the battery cell unit 300 adjacent to this battery cell unit 300. Through the bus bar 800, each battery cell unit 300 can be connected in series or in parallel in sequence, so as to adjust the voltage and capacity of the battery pack.

[0102] Exemplarily, the bus bar 800 is connected to the pole posts 322 of two battery cell units 300 through two bolts.

[0103] In specific implementation, the battery cell unit 300 has an openable and closable sampling port 323, and the sampling port 323 is located on the second end face 320.

[0104] Among them, the sampling port 323 is used to monitor and adjust the chemical state inside the battery cell. Through the sampling port 323, parameters such as voltage, current, and temperature inside the battery cell can be obtained, so as to realize the real-time monitoring of the battery cell state and ensure the safety and performance of the battery cell.

[0105] Exemplarily, the sampling port 323 is located at the upper part of the second end face 320.

[0106] Referring to Figure 2 and Figure 7 , in some embodiments, the housing 100 has an openable and closable maintenance window 140, and the maintenance window 140 communicates with each sub-accommodation cavity 111.

[0107] Among them, by providing the maintenance window 140, when a battery cell unit 300 fails or is damaged, the maintenance window 140 is opened, and then the faulty or damaged battery cell unit 300 can be taken out and replaced through the maintenance window 140.

[0108] Exemplarily, the first limiting member 500 is detachably connected to the convex portion 311 and the housing 100, and the second limiting member 600 is detachably connected to the housing 100 and the connecting portion 321. Compared with the prior art in which the battery cell unit 300 is bonded to the housing 100, it makes the disassembly of the battery cell unit 300 more convenient. Thus, when the maintenance window 140 is opened, it is convenient to disassemble a single battery cell unit 300, so as to facilitate the replacement of a single battery cell unit 300.

[0109] Specifically, the housing 100 includes a baffle 150 which is detachably connected to the peripheral side of the maintenance window 140 to close the maintenance window 140 and thus close the accommodation cavity 110. When it is necessary to repair and replace the battery cell unit 300, the baffle 150 is removed from the maintenance window 140 to open the maintenance window 140.

[0110] It can be understood that the connection mode between the baffle 150 and the peripheral side of the maintenance window 140 can be threaded connection, snap connection or pin connection, etc.

[0111] In a specific implementation, the partition 200 is a heat insulation board.

[0112] Among them, when the battery cell unit 300 undergoes thermal runaway, the temperature of the battery cell unit 300 will rise. By providing the partition 200, the heat of the battery cell unit 300 is isolated within the corresponding sub-accommodation cavity 111, preventing the battery cell unit 300 from transferring heat to the adjacent battery cell unit 300 through the partition 200, which may cause the temperature of the adjacent battery cell unit 300 to rise.

[0113] It can be understood that the battery cell unit 300 can be in contact with the partition 200 to reduce the space between the battery cell unit 300 and the partition 200, thereby reducing the volume of the battery pack.

[0114] In a specific implementation, an insulating layer is provided between the sub-accommodation cavity 111 and the battery cell unit 300, and the insulating layer is connected to the partition 200.

[0115] Among them, by providing the insulating layer, the insulation performance of the partition 200 is improved to prevent the battery cell unit 300 from short-circuiting.

[0116] Exemplarily, an insulating paint is applied to the partition 200 to form the insulating layer.

[0117] In a specific implementation, the battery pack further includes a distribution box which is arranged on one side of the accommodation cavity 110.

[0118] Based on the above embodiments, an embodiment of the present application provides an electrical device, including a device body and a battery pack arranged on the device body.

[0119] Among them, the specific structure of the battery pack has been described in detail in the above embodiments and will not be elaborated here.

[0120] Exemplarily, the electrical device includes a vehicle.

[0121] The electrical device provided by the embodiment of the present application has a battery pack. By arranging at least one partition 200 in the accommodation cavity 110, the accommodation cavity 110 is divided into at least two sub-accommodation cavities 111. The battery cell units 300 are located in the sub-accommodation cavities 111 in a one-to-one correspondence. Thus, when some of the battery cell units 300 experience thermal runaway, the thermal runaway gas generated is isolated in the corresponding sub-accommodation cavity 111 and will not flow into the sub-accommodation cavities 111 corresponding to other battery cell units 300, preventing the thermal runaway gas from coming into contact with other battery cell units 300 and thus avoiding causing thermal runaway of other battery cell units 300. By providing an exhaust port 312 on the battery cell unit 300 and arranging an exhaust passage 120 on the housing 100 that is correspondingly communicated with the sub-accommodation cavity 111, when the battery cell unit 300 experiences thermal runaway, the exhaust passage 120 communicates the exhaust port 312 with the outside of the housing 100. Thus, the thermal runaway gas generated by the battery cell unit 300 can be discharged from the housing 100, avoiding explosion of the battery cell units 300 in the sub-accommodation cavity 111 due to excessive accumulation of thermal runaway gas in the sub-accommodation cavity 111, and thus avoiding explosion of the battery pack. At the same time, the exhaust ports 312 and the exhaust passages 120 are in one-to-one correspondence to avoid the thermal runaway gas affecting other battery cell units 300 when being discharged.

[0122] In the description of the embodiments of the present application, the terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0123] In the embodiments of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to specific circumstances.

[0124] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0125] Unless otherwise specified, the term "plurality" means two or more.

[0126] After considering the specification and practicing the application disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the scope of the present application is only limited by the appended claims.

Claims

1. A battery pack, characterized in that: include: A housing (100), at least one partition (200) and at least two battery cell units (300); The shell (100) has a housing cavity (110) therein; the partition (200) is located in the shell (100) to divide the housing cavity (110) into at least two sub-housing cavities (111); the battery cell units (300) are located in the sub-housing cavities (111) in a one-to-one correspondence; the battery cell units (300) have exhaust ports (312) therein; and the exhaust ports (312) are in communication with the inner cavities of the battery cell units (300); The shell (100) has at least two openable and closable exhaust channels (120), the exhaust channels (120) being connected to the sub-accommodation chamber (111) respectively, and the exhaust channels (120) being configured to connect the exhaust port (312) with the outside of the shell (100) when thermal runaway occurs in the corresponding battery cell unit (300), so as to allow the thermal runaway gas generated by the battery cell unit (300) to be discharged from the shell (100).

2. The battery pack according to claim 1, characterized in that: It also includes at least two blocking members (400), wherein the blocking members (400) are located respectively between the exhaust port (312) and the exhaust channel (120), and the blocking members (400) are used to open or close at least one of the exhaust port (312) and the exhaust channel (120).

3. The battery pack according to claim 2, characterized in that: The blocking member (400) is an explosion-proof member.

4. The battery pack according to claim 1, characterized in that: The housing (100) comprises a side plate (130), the side plate (130) being opposite to each of the exhaust ports (312), the side plate (130) having at least two exhaust holes (131), and the exhaust holes (131) being located at corresponding ends of the exhaust channel (120).

5. The battery pack according to claim 4, characterized in that: The invention also comprises a first limiting member (500), the side plate (130) having at least two first mounting portions (133), the first limiting member (500) having at least two first grooves (511), the first mounting portion (133) having at least two second grooves (134), the first grooves (511) correspondingly assembled with the second grooves (134) forming the exhaust passage (120).

6. The battery pack according to claim 5, characterized in that: The first limiting member (500) comprises at least two first connecting sections (510) and a plurality of second connecting sections (520), the first connecting section (510) being located between two adjacent second connecting sections (520), and the first groove (511) being located on the first connecting section (510); The side plate (130) also has a plurality of second mounting portions (135), the first mounting portion (133) is located between two adjacent second mounting portions (135), and the second connecting section (520) is connected to the second mounting portion (135).

7. The battery pack according to any one of claims 1 to 6, characterized in that: The battery cell unit (300) has a first end surface (310), the first end surface (310) has a protrusion (311), the protrusion (311) is at least partially located in the exhaust channel (120), and the exhaust port (312) is located on the end surface of the protrusion (311) facing the housing (100).

8. The battery pack according to claim 7, characterized in that: It also includes at least one sealing member (700), wherein the sealing member (700) is connected between the outer side wall of the protruding portion (311) and the inner side wall of the exhaust passage (120).

9. The battery pack according to claim 7, characterized in that: The battery cell unit (300) further comprises a second stopper (600), the battery cell unit (300) having a second end face (320) opposite to the first end face (310), the second end face (320) having a connecting portion (321), and the second stopper (600) connecting the connecting portion (321) and the shell (100).

10. The battery pack according to claim 9, characterized in that: The second limiting member (600) comprises a connecting plate (610) and at least two limiting portions (620) arranged on the connecting plate (610), the limiting portions (620) correspondingly overlap the connecting portions (321), and the connecting plate (610) is connected to the housing (100).

11. The battery pack according to claim 9, characterized in that: The battery cell unit (300) has two poles (322), and the poles (322) are located on the second end surface (320).

12. The battery pack according to claim 11, characterized in that: The battery cell unit (300) is provided with an openable and closable sampling port (323), and the sampling port (323) is located on the second end surface (320).

13. The battery pack according to any one of claims 1 to 6, characterized in that: The housing (100) is provided with an openable and closable maintenance window (140), and the maintenance window (140) is in communication with each of the sub-accommodating chambers (111).

14. The battery pack according to any one of claims 1 to 6, characterized in that: The partition (200) is a heat insulation board.

15. The battery pack according to any one of claims 1 to 6, characterized in that: An insulating layer is provided between the sub-accommodating cavity (111) and the battery cell unit (300), and the insulating layer is connected to the partition (200).

16. An electrical equipment, characterized in that: The invention comprises a device body and a battery pack as claimed in any one of claims 1 to 15 arranged on the device body.

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