Battery module and battery pack

Abstract

The embodiment of the utility model provides a battery module. The battery module comprises a battery box and a battery, wherein the battery box comprises a box body, an end plate, a cover plate and a containing cavity defined by the box body, the end plate and the cover plate, and a battery and immersion liquid are arranged in the containing cavity; as the exhaust channel is arranged in the end plate, the inlet of the exhaust channel is arranged at one end, close to the cover plate, of the end plate, and the outlet of the exhaust channel is arranged at one end, close to the bottom plate of the box body, of the end plate, when the battery is in thermal runaway, thermal runaway gas in the accommodating cavity enters the exhaust channel from the inlet; and the high-temperature gas is guided by the exhaust channel to the bottom of the battery box to be exhausted, so that the high-temperature gas in thermal runaway can be exhausted from the bottom far away from the riding room, and potential safety hazards caused by the influence of the high-temperature gas in thermal runaway on the temperature in the riding room are avoided. The utility model further provides a battery pack which comprises the battery module and has the beneficial effects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly to a battery module and a battery pack. BACKGROUND

[0002] Generally, the battery module is arranged at the bottom of the automobile with the battery pack, and the passenger compartment in the automobile is located above the battery pack. In the related art, the exhaust port is arranged on the cover plate of the battery module, and when the battery is in thermal runaway, the thermal runaway gas is discharged from the cover plate of the battery module, and the passenger compartment located above the battery pack is easily affected by the high-temperature thermal runaway gas and the temperature is increased, which is not conducive to the safety of the people in the automobile. And the thermal runaway gas is retained above the battery mounting cavity, which is also not conducive to the discharge of the thermal runaway gas. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiments of the present application is to provide a battery module and a battery pack, which can guide the gas in the battery box and make the gas in the battery box discharged from the bottom of the battery box, thereby improving the safety performance of the battery module and the battery pack.

[0004] In a first aspect, the embodiments of the present application provide a battery module, comprising:

[0005] a battery box, the battery box comprising a box body, an end plate and a cover plate, the end plate being arranged at both ends of the box body, and the cover plate being arranged on the box body, the box body, the end plate and the cover plate surrounding a containing cavity, and the containing cavity being filled with immersion liquid;

[0006] a battery, arranged in the containing cavity and at least partially immersed in the immersion liquid;

[0007] wherein the end plate is provided with an exhaust passage, the inlet of the exhaust passage is arranged at one end of the end plate close to the cover plate, and the outlet of the exhaust passage is arranged at one end of the end plate close to the bottom plate of the box body.

[0008] In an embodiment, the end plate is provided with a hollow structure, the hollow structure penetrates through the end plate along a first direction, the hollow structure serves as the exhaust passage, the hollow structure is communicated between the inlet of the exhaust passage and the outlet of the exhaust passage, and the first direction is the height direction of the battery box.

[0009] In an embodiment, the hollow structure is one of a triangle, a quadrilateral, a pentagon, a hexagon, a circle or an ellipse.

[0010] In one embodiment, a hollow structure is provided in the end plate, and the hollow structure penetrates the end plate along a first direction. At least two partitions are provided in the hollow structure, each of the partitions extends along the first direction, and each of the partitions is connected between the two side walls of the end plate. The two adjacent partitions and the side walls of the end plate are arranged to form the exhaust channel.

[0011] In one embodiment, one long side of one of the two adjacent partitions intersects with one long side of the other partition, and both are connected to one side wall of the end plate, and the two adjacent partitions and the other side wall of the end plate are arranged to form a triangle; or,

[0012] The two adjacent partitions and the two side walls of the end plate are arranged to form a quadrilateral.

[0013] In one embodiment, the exhaust channel includes multiple curved segments and multiple extended segments, and the curved segments and the extended segments are alternately connected. The curved segment located at the head end is connected to the inlet of the exhaust channel, and the curved segment located at the end end is connected to the outlet of the exhaust channel.

[0014] In one embodiment, an exhaust port is provided on the bottom plate of the box body, the exhaust port is connected to the outside of the battery box, one end of the end plate away from the cover plate abuts against the bottom plate of the box body, and the outlet of the exhaust channel is correspondingly connected to the exhaust port.

[0015] In one embodiment, the inlet of the exhaust channel is arranged on the side wall of the end plate close to the accommodating cavity;

[0016] The battery box also includes an air intake structure, which is arranged on a side of the cover plate facing the accommodating cavity, one end of the air intake structure abuts the side wall of the end plate close to the accommodating cavity, and the air intake structure and the cover plate are arranged to form an air intake channel, which is connected to the inlet of the exhaust channel.

[0017] In one embodiment, the battery box further includes a sealing strip, which is arranged around the junction between the air intake structure and the end plate.

[0018] In a second aspect, an embodiment of the present application further provides a battery pack comprising the above-mentioned battery module.

[0019] The beneficial effects of the battery module provided by the embodiment of the present application are as follows: the battery module of the present application includes a battery box and batteries; wherein the battery box includes a box body, an end plate and a cover plate, and a accommodating cavity formed by the box body, the end plate and the cover plate, and the accommodating cavity is provided with batteries and immersion liquid; compared with the related art, the end plate of the present application is provided with an exhaust channel, the inlet of the exhaust channel is provided at one end of the end plate close to the cover plate, and the outlet of the exhaust channel is provided at one end of the end plate close to the bottom plate of the box body; since the exhaust channel is provided in the end plate, and the inlet and outlet of the exhaust channel are respectively located at one end close to the cover plate and one end close to the bottom plate of the box body, when the immersion liquid is injected into the accommodating cavity, the gas in the accommodating cavity is The gas can enter the exhaust channel from the inlet, be discharged from the outlet through the guidance of the exhaust channel, and be discharged from the bottom of the box to the outside of the battery box; because the battery module is arranged at the bottom of the car along with the battery pack, when the battery thermal runaway occurs, if the thermal runaway gas is discharged from the cover of the battery module, it is easy to cause the temperature in the passenger compartment to be too high, which is not conducive to the safety of the people inside; in the present application, when the battery thermal runaway occurs, the thermal runaway gas in the accommodating cavity enters the exhaust channel from the inlet, and is guided by the exhaust channel to flow to the bottom of the battery box for discharge, so that the high-temperature gas of thermal runaway can be discharged from the bottom away from the passenger compartment, avoiding the high-temperature gas of thermal runaway from affecting the temperature in the passenger compartment and causing safety hazards. The embodiment of the present application also provides a battery pack, including the above-mentioned battery module, which has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a battery module provided in one embodiment of the present application;

[0022] Figure 2 A schematic diagram of the exploded structure of a battery module provided in one embodiment of the present application;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of the end plate of the battery module provided in one embodiment of the present application;

[0024] Figure 4 A schematic diagram of the three-dimensional structure of the exhaust structure and cover plate in the battery module provided in one embodiment of the present application;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the end plate, exhaust structure and cover plate of a battery module provided in one embodiment of the present application;

[0026] Figure 6 A schematic diagram of the three-dimensional structure of a box and an end plate in a battery module provided in one embodiment of the present application;

[0027] Figure 7 A schematic diagram of the cross-sectional structure of an end plate in a battery module provided in one embodiment of the present application;

[0028] Figure 8 A schematic cross-sectional view of an end plate in a battery module according to another embodiment of the present application;

[0029] Figure 9 A schematic cross-sectional view of an end plate in a battery module according to another embodiment of the present application;

[0030] Figure 10 A schematic structural diagram of an exhaust channel in a battery module provided in yet another embodiment of the present application;

[0031] Among them, the reference numerals in the figures are:

[0032] Battery module 100; battery box 110; battery 120; box body 111; bottom plate 1111; side plate 1112; end plate 112; cover plate 113; air intake structure 114; exhaust channel T; air intake channel J; inlet K1; outlet K2; exhaust port K3; air intake port K4; hollow structure D; partition 1121; width W1 of exhaust channel; width W2 of end plate; curved section T1; extended section T2; first direction Z; second direction Y; third direction X. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0034] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do 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 therefore cannot be understood as a limitation on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] Please also refer to Figures 1 to 6 Now, the battery module 100 provided in one embodiment of the present application is described. Figure 1 and Figure 2 As shown, the battery module 100 includes a battery box 110 and a battery 120 arranged in the battery box 110. The battery module 100 of the present application is an immersion battery module 100, and the immersion liquid and the battery 120 are both arranged in a receiving cavity in the battery box 110. Specifically, the battery box 110 includes a box body 111, an end plate 112 and a cover plate 113. The box body 111 includes a bottom plate 1111 and two side plates 1112 arranged on the bottom plate 1111; the battery box 110 has two end plates 112, and the two end plates 112 are respectively arranged at the two ends of the bottom plate 1111 of the box body 111, and the cover plate 113 is covered on the two end plates 112 and the two side plates 1112; the bottom plate 1111, the two side plates 1112, the two end plates 112 and the cover plate 113 are arranged to form a receiving cavity. The accommodating cavity is provided with a battery 120 and is filled with an immersion liquid, and at least a portion of the battery 120 is immersed in the immersion liquid.

[0038] The end plate 112 is provided with an exhaust channel T, such as Figure 3 Optionally, at least one of the two end plates 112 is provided with an exhaust channel T, or both end plates 112 are provided with an exhaust channel T. An inlet K1 of the exhaust channel T is provided at one end of the end plate 112 close to the cover plate 113, and an outlet K2 of the exhaust channel T is provided at one end of the end plate 112 close to the bottom plate 1111 of the box body 111.

[0039] Optionally, two bottom beams are further provided within the battery box 110. The two bottom beams are mounted on the bottom plate 1111, and the batteries 120 are mounted on the bottom beams to form a stable structure. Furthermore, the batteries 120 are mounted on the bottom beams so that a gap is formed between the batteries 120 and the bottom plate 1111. The two bottom beams are spaced apart, and the two bottom beams, the bottom plate 1111, and the bottom surface of the batteries 120 form a liquid flow channel, allowing immersion liquid to flow through the liquid flow channel, thereby increasing the contact area between the immersion liquid and the batteries 120 and improving heat exchange efficiency.

[0040] In the battery module 100 provided in the embodiment of the present application, an exhaust channel T is provided in the end plate 112; since the exhaust channel T is provided in the end plate 112, and the inlet K1 and outlet K2 of the exhaust channel T are respectively located at one end close to the cover plate 113 and one end close to the bottom plate 1111 of the box body 111, when the immersion liquid is injected into the accommodating cavity, the gas in the accommodating cavity can enter the exhaust channel T from the inlet K1, be guided by the exhaust channel T, and be discharged from the outlet K2 and discharged from the bottom of the box body 111 to the outside of the battery box 110; since the battery module 100 is discharged along with the battery pack It is arranged at the bottom of the car. When the battery 120 has thermal runaway, if the thermal runaway gas is discharged from the cover 113 of the battery module 100, it will easily cause the temperature in the passenger compartment to be too high, which is not conducive to the safety of the people in the compartment. In the present application, when the battery 120 has thermal runaway, the thermal runaway gas in the accommodating cavity enters the exhaust channel T from the inlet K1, and flows to the bottom of the battery box 110 through the guidance of the exhaust channel T for discharge. The high-temperature gas of thermal runaway can be discharged from the bottom away from the passenger compartment, thereby avoiding the high-temperature gas of thermal runaway from affecting the temperature in the passenger compartment and causing safety hazards.

[0041] In this embodiment, the bottom plate 1111 and the two side plates 1112 of the housing 111 are integrally formed to prevent leakage or outflow of the immersion liquid. The two end plates 112 are fixed to the housing 111, the housing 111 and the cover plate 113, and the end plates 112 and the cover plate 113 by welding, and / or sealed with a sealant to prevent the immersion liquid from flowing out of the joints. The battery module 100 also includes an injection nozzle, a liquid outlet nozzle, a positive electrode connector, and a negative electrode connector. The injection nozzle, the liquid outlet nozzle, the positive electrode connector, and the negative electrode connector are all provided on the end plate 112. Optionally, the injection nozzle and the liquid outlet nozzle are provided on the two end plates 112, respectively, or the injection nozzle and the liquid outlet nozzle are provided on the same end plate 112. The positive electrode connector and the negative electrode connector are provided on the two end plates 112, respectively. Specifically, the positive electrode connector and the negative electrode connector are provided according to the connection layout of the positive and negative electrodes of the battery 120 in the accommodating cavity, which is not limited here.

[0042] Optionally, the battery box 110 further includes an air intake structure 114, such as Figure 4As shown. Specifically, the air intake structure 114 is provided on the side of the cover plate 113 facing the accommodating chamber, and is surrounded by the cover plate 113 to form an air intake channel J. It can be understood that when the immersion liquid is injected into the accommodating chamber, the gas in the accommodating chamber will rise to the cover plate 113 because the density of the gas is less than that of the immersion liquid; the air intake structure 114 is provided on the side of the cover plate 113 facing the accommodating chamber to facilitate the gas in the accommodating chamber to enter the air intake channel J. When thermal runaway occurs in the battery 120, on the one hand, since the density of the thermal runaway gas is less than that of the immersion liquid, the thermal runaway gas will escape from the immersion liquid; on the other hand, since the temperature of the thermal runaway gas is higher, the high-temperature gas is more likely to rise to the cover plate 113; when thermal runaway occurs in the battery 120, the air intake structure 114 is provided on the side of the cover plate 113 facing the accommodating chamber to facilitate the thermal runaway gas to enter the air intake channel J and then be discharged through the exhaust channel T.

[0043] Optionally, a plurality of air inlets K4 are provided on the side of the air intake structure 114 facing the accommodating cavity, so that the gas in the accommodating cavity can enter the air intake channel J from the air inlet K4. An explosion-proof valve is provided on the battery 120. When the battery 120 is in thermal runaway, the battery 120 releases pressure and exhausts gas through the explosion-proof valve. The multiple air inlets K4 on the air intake structure 114 correspond one-to-one with the explosion-proof valves of the multiple batteries 120, so that the gas discharged from the explosion-proof valve can accurately enter the air intake channel J from the air inlet K4. Optionally, a sealing gasket is provided between the top of the battery 120 and the air intake structure 114. The sealing gasket corresponds one-to-one with the explosion-proof valve and the air inlet K4, so that a sealed flow channel is formed between the explosion-proof valve and the air inlet K4 for the thermal runaway gas to flow through. On the one hand, the provision of the sealing gasket can prevent the immersion liquid from flowing into the air intake structure 114 and leaking. On the other hand, the sealing gasket can prevent the thermal runaway gas from leaking from the side of the explosion-proof valve.

[0044] Optionally, a layer of high-temperature resistant anti-permeability membrane is provided on the side of the air intake structure 114 facing the accommodating cavity. The anti-permeability membrane continuously covers multiple air inlets K4, thereby preventing gas from passing through. When the temperature of the gas in the accommodating cavity rises and the pressure is too high, the gas breaks through the anti-permeability membrane and enters the air intake channel J for discharge. It can be understood that the anti-permeability membrane at the explosion-proof valve corresponding to the thermal runaway battery 120 is broken, and the anti-permeability membranes of the other air inlets K4 are still sealed at the air inlet K4 without being broken. High-temperature gas and high-temperature particles circulate in the air intake channel J and will not leak from the air inlet K4 to other batteries 120 that are not in thermal runaway, thereby preventing the occurrence of heat spread. Optionally, the number of anti-permeability membranes can also be multiple, and multiple anti-permeability membranes correspond one-to-one to multiple air inlets K4. When one of the batteries 120 breaks through the corresponding anti-permeability membrane due to thermal runaway, it will not affect the other anti-permeability membranes, which is conducive to preventing heat spread.

[0045] like Figure 5As shown, in the present embodiment, the inlet K1 of the exhaust passage T is arranged on the end plate 112 close to the side wall of the accommodating cavity, and one end of the air inlet structure 114 abuts against the end plate 112 close to the side wall of the accommodating cavity, so that the air inlet passage J is communicated with the exhaust passage T, and the gas entering the air inlet passage J from the accommodating cavity can enter the exhaust passage T as much as possible and be discharged. Optionally, the battery box 110 further comprises a sealing strip (not shown), which is arranged around the abutting position of the air inlet structure 114 and the end plate 112 to seal, so as to reduce the probability of gas leakage from the connecting position of the air inlet structure 114 and the end plate 112. Optionally, the sealing strip is made of silica gel or other sealing glue. Optionally, the air inlet structure 114 is welded to the end plate 112, so as to reduce the gas leakage at the connecting position.

[0046] Optionally, in some embodiments, the exhaust passage T penetrates the end plate 112 along the first direction Z, the air inlet structure 114 is overlapped on the end plate 112, and the overlapped position of the air inlet structure 114 is provided with a through hole to communicate the air inlet passage J with the exhaust passage T.

[0047] In the present embodiment, the bottom plate 1111 of the box body 111 is provided with an exhaust port K3, which is communicated with the outside of the battery box 110, so that the gas in the battery box 110 can be discharged out of the battery box 110. The exhaust passage T in the end plate 112 penetrates the end plate 112 along the first direction Z, and one end of the end plate 112 away from the cover plate 113 abuts against the bottom plate 1111 of the box body 111, so that the exhaust passage T is communicated with the exhaust port K3 correspondingly. The first direction Z is the height direction of the battery box 110, as shown. Figure 6

[0048] Optionally, in some other embodiments, the bottom plate 1111 of the box body 111 is provided with an air outlet structure (not shown) and is provided with an exhaust port K3. The air outlet structure and the bottom plate 1111 form an air outlet passage, and the air outlet passage is communicated with the exhaust port K3. The outlet K2 of the exhaust passage T is arranged on the end plate 112 close to the side wall of the accommodating cavity, and one end of the air outlet structure abuts against the end plate 112 close to the side wall of the accommodating cavity, so that the air outlet passage is communicated with the exhaust passage T through the outlet K2. The gas entering the exhaust passage T enters the air outlet passage and is discharged out of the battery box 110 from the exhaust port K3.

[0049] Please refer to Figure 3 and Figure 7 ​In the embodiment, the exhaust passage T extends along the first direction Z, and is communicated between the inlet K1 of the exhaust passage T and the outlet K2 of the exhaust passage T, so that the gas can flow to the bottom plate 1111 under the guidance of the exhaust passage T. Specifically, the end plate 112 is provided with a hollow structure D, and the hollow structure D penetrates the end plate 112 along the first direction Z. The hollow structure D is provided with at least two partitions 1121, each of which extends along the first direction Z and is connected between the two side walls of the end plate 112. It can be understood that the provision of the hollow structure D in the end plate 112 will reduce the overall structural strength of the end plate 112. The partitions 1121 provided in the hollow structure D are connected to the two side walls in the thickness direction of the end plate 112, so that the partitions 1121 can provide support to the end plate 112 in the thickness direction of the end plate 112, so that the end plate 112 can resist external force impact in the thickness direction, thereby strengthening the structural strength of the end plate 112 and reducing the possibility of deformation and damage of the end plate 112 under external force impact.

[0050] Specifically, the two adjacent partitions 1121 and the side wall of the end plate 112 form an exhaust passage T, as shown in Figure 3 and Figure 7 . In the preparation process of the battery module 100, in order to reduce the weight of the battery pack, the end plate 112 of the battery module 100 is provided with a hollow structure D and a partition 1121 for strengthening the structural strength. In the present application, the channel formed by the two adjacent partitions 1121 and the side wall of the end plate 112 is reused as the exhaust passage T, and the inlet K1 of the exhaust passage T is communicated with the accommodation cavity, so as to exhaust, thereby simplifying the structure of the battery module 100 and avoiding the need to additionally provide a structure with an exhaust passage.

[0051] In the embodiment, one long side of one of the two adjacent partitions 1121 intersects with one long side of the other partition 1121, and is connected to one side wall of the end plate 112. That is, the two adjacent partitions 1121 and the other side wall of the end plate 112 form a triangular cross section, as shown in Figure 7 . Further, the hollow structure D is provided with a plurality of partitions 1121, and the plurality of partitions 1121 are connected end to end and fixed to the two side walls in the hollow structure D of the end plate 112, thereby forming a plurality of triangular structures in the end plate 112, further strengthening the structural strength of the end plate 112, and further reducing the possibility of deformation and damage of the end plate 112 under external force impact.

[0052] Optionally, in some other embodiments, the partitions 1121 are arranged in the hollow structure D along the second direction Y and connected between the two side walls of the end plate 112 along the third direction X, as shown in Figure 8As shown. The second direction Y is the width direction of the battery box 110. The third direction X is the length direction of the battery box 110, which is also the thickness direction of the end plate 112. The two adjacent partitions 1121 and the two side walls of the end plate 112 are arranged to form a quadrilateral, that is, the exhaust channel T is a quadrilateral. Figure 8 In the embodiment, the exhaust channel T is a rectangle. Optionally, the exhaust channel T may also be a square, a trapezoid, a parallelogram or other quadrilateral. Optionally, the partition 1121 may also be curved, so that the exhaust channel T may have other shapes.

[0053] In one embodiment, the partition 1121 is not arranged in the hollow structure D, that is, the hollow structure D is used as the exhaust channel T. Figure 9 As shown. It can be understood that the hollow structure D extends through the end plate 112 along the first direction Z. The hollow structure D serves as an exhaust channel T, and its channel volume is relatively large, allowing for the rapid discharge of large quantities of high-temperature gas. Optionally, the ratio of the width W1 of the exhaust channel T to the width W2 of the end plate 112 is greater than or equal to 2 / 3. The larger exhaust channel T is provided to allow a large flow of high-temperature gas to pass through the exhaust channel T, thereby allowing a large amount of high-temperature gas to be rapidly discharged. Optionally, the shape of the hollow structure D is one of a triangle, a quadrilateral, a pentagon, a hexagon, a circle, or an ellipse.

[0054] Optionally, in some other embodiments, the exhaust channel T includes a plurality of curved sections T1 and a plurality of extended sections T2, such as Figure 10 As shown, the curved segments T1 and extended segments T2 are alternately connected. The curved segment T1 at the head end is connected to the inlet K1 of the exhaust channel T, while the curved segment T1 at the tail end is connected to the outlet K2 of the exhaust channel T. Due to the long path of the exhaust channel T, the high-temperature gas enters the exhaust channel T and its temperature drops further. As a result, the gas flowing out of the outlet K2 of the exhaust channel T has a lower temperature and is then discharged from the battery module 100 through the exhaust port K3, further improving the safety performance of the battery module 100.

[0055] Another embodiment of the present application provides a battery pack that is installed at the bottom under the passenger compartment of a car. The battery pack includes a frame and a battery module 100 provided in an embodiment of the present application. Multiple battery modules 100 are arranged in the frame of the battery pack, and the multiple battery modules 100 are connected in series or in parallel through structures such as conductive bars, and then output power to external electrical equipment through the main electrode. Optionally, a control system such as a battery management system (BMS) is also provided in the battery pack to control the battery pack.

[0056] The above is a description of the battery module 100 and the battery pack provided in the embodiments of the present application.

[0057] The battery module provided in the embodiment of the present application includes a battery box and batteries; wherein the battery box includes a box body, an end plate and a cover plate, and a accommodating cavity formed by the box body, the end plate and the cover plate, and the accommodating cavity is provided with batteries and immersion liquid; compared with the related art, the end plate of the present application is provided with an exhaust channel, the inlet of the exhaust channel is provided at one end of the end plate close to the cover plate, and the outlet of the exhaust channel is provided at one end of the end plate close to the bottom plate of the box body; since the exhaust channel is provided in the end plate, and the inlet and outlet of the exhaust channel are respectively located at one end close to the cover plate and one end close to the bottom plate of the box body, when the immersion liquid is injected into the accommodating cavity, the gas in the accommodating cavity can enter from the inlet The exhaust channel is guided by the exhaust channel and discharged from the outlet and discharged from the bottom of the box to the outside of the battery box. Since the battery module is arranged at the bottom of the vehicle along with the battery pack, if the battery thermal runaway occurs, the thermal runaway gas is easily discharged from the cover of the battery module, which is not conducive to the safety of the passengers in the passenger compartment. In the present application, when the battery thermal runaway occurs, the thermal runaway gas in the accommodating cavity enters the exhaust channel from the inlet, and is guided by the exhaust channel to flow to the bottom of the battery box for discharge. This allows the high-temperature gas of thermal runaway to be discharged from the bottom away from the passenger compartment, avoiding the high-temperature gas of thermal runaway from affecting the temperature in the passenger compartment and causing safety hazards. The embodiment of the present application also provides a battery pack, including the above-mentioned battery module, which has the above-mentioned beneficial effects.

[0058] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery module, characterized in that: include: A battery box, comprising a box body, end plates, and a cover plate, wherein the end plates are disposed at both ends of the box body, the cover plate is disposed on the box body, and the box body, the end plates, and the cover plate enclose a receiving cavity, wherein the receiving cavity is filled with an immersion liquid; a battery, disposed in the accommodating cavity and at least partially immersed in the immersion liquid; An exhaust channel is provided in the end plate, an inlet of the exhaust channel is provided at one end of the end plate close to the cover plate, and an outlet of the exhaust channel is provided at one end of the end plate close to the bottom plate of the box body.

2. The battery module according to claim 1, wherein: A hollow structure is provided in the end plate, and the hollow structure penetrates the end plate along a first direction. The hollow structure serves as the exhaust channel, and the hollow structure is connected between the inlet and the outlet of the exhaust channel. The first direction is the height direction of the battery box.

3. The battery module according to claim 2, wherein: The hollow structure is one of a triangle, a quadrilateral, a pentagon, a hexagon, a circle or an ellipse.

4. The battery module according to claim 1, wherein: A hollow structure is provided in the end plate, and the hollow structure penetrates the end plate along a first direction. At least two partitions are provided in the hollow structure, each of the partitions extends along the first direction, and each of the partitions is connected between the two side walls of the end plate. The two adjacent partitions and the side walls of the end plate are arranged to form the exhaust channel.

5. The battery module according to claim 4, wherein: Among two adjacent partitions, one long side of one partition intersects with one long side of the other partition, and both are connected to one side wall of the end plate, and the two adjacent partitions and the other side wall of the end plate are arranged to form a triangle; or, The two adjacent partitions and the two side walls of the end plate are arranged to form a quadrilateral.

6. The battery module according to claim 1, wherein: The exhaust channel includes multiple curved sections and multiple extended sections, the curved sections and extended sections are alternately connected, the curved section at the head end is connected to the inlet of the exhaust channel, and the curved section at the tail end is connected to the outlet of the exhaust channel.

7. The battery module according to claim 1, wherein: An exhaust port is provided on the bottom plate of the box body, the exhaust port is connected to the outside of the battery box, one end of the end plate away from the cover plate abuts against the bottom plate of the box body, and the outlet of the exhaust channel is correspondingly connected to the exhaust port.

8. The battery module according to claim 1, wherein: The inlet of the exhaust channel is arranged on the side wall of the end plate close to the accommodating cavity; The battery box also includes an air intake structure, which is arranged on a side of the cover plate facing the accommodating cavity, one end of the air intake structure abuts the side wall of the end plate close to the accommodating cavity, and the air intake structure and the cover plate are arranged to form an air intake channel, which is connected to the inlet of the exhaust channel.

9. The battery module according to claim 8, wherein: The battery box further includes a sealing strip, which is arranged around the abutment portion between the air intake structure and the end plate.

10. A battery pack, characterized in that: Comprising the battery module according to any one of claims 1 to 9.

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