Battery pack and energy storage device

Abstract

The invention discloses a battery pack and an energy storage device, the battery pack comprises at least one battery module, a cooling part is arranged in the battery module, the cooling part comprises a body part and a fixing part which are connected, the fixing part is arranged on the bottom side of the battery module and extends along the X direction, and the fixing part comprises a first limiting part, a first positioning part and a first guide matching part; the mounting piece comprises a second limiting part, a second positioning part and a second guide matching part; the first limiting part abuts against the second limiting part, the second positioning part is detachably connected to the first positioning part, the first guide matching part is arranged on the second guide matching part, and the first guide matching part can slide relative to the second guide matching part. Therefore, the two ends of the battery module are fixed on the mounting parts, creep failure among components of the battery module caused by shaking in the transportation process is avoided, the alignment capability of the battery module and the battery box body is improved, and the working efficiency of mounting, fixing and maintaining the battery module is improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery pack and an energy storage device. Background Art

[0002] In the prior art, the battery module is usually first set on the battery box, and then at least 4 bolts are used to fix the battery module on the battery box. With the continuous development of the energy storage industry, the mass and volume of the battery module are getting larger and larger. If the fixing method in the prior art is still used, the following problems may occur: (1) The mass and volume of the battery module continue to increase, which will make the installation and maintenance of the battery module difficult and the operation of the operator dangerous; (2) The battery module is fixed on the battery box with bolts. During transportation, the transportation device shakes or vibrates, which may cause creep failure between the bolts and the fixed battery module, and creep failure may also occur between the components of the battery module, thereby affecting the battery performance; (3) The process of setting the battery module on the battery box in the prior art is difficult to control, resulting in poor alignment between the battery module and the battery box, thereby affecting the work efficiency of the battery module installation. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the purpose of the present invention is to propose a battery pack and an energy storage device. As a result, both ends of the battery module are fixed to the mounting member, and the fixing method is simple and easy, which avoids the creep failure between the components of the battery module caused by shaking during transportation to the greatest extent, and greatly improves the alignment ability of the battery module and the battery box, improves the work efficiency of the installation, fixation and maintenance of the battery module, and thus improves the battery performance of the battery pack.

[0004] The present invention provides a battery pack. In an embodiment of the present invention, the battery pack includes:

[0005] at least one battery module, wherein a cooling member is provided inside the battery module, wherein the cooling member comprises a main body portion and a fixing portion connected to each other, wherein the fixing portion is arranged at the bottom side of the battery module and extends along the X direction, wherein the fixing portion comprises a first limiting portion, a first positioning portion and a first guiding matching portion, wherein the first limiting portion is arranged at one end of the fixing portion along the X direction, the first positioning portion is arranged at one end of the fixing portion along the X direction away from the first limiting portion, and the first guiding matching portion is extended along the X direction, wherein the X direction is the length direction or the width direction of the battery pack;

[0006] A mounting member, the mounting member comprising a second limiting portion, a second positioning portion and a second guide matching portion, the second limiting portion being arranged at one end of the mounting member along the X direction, the second positioning portion being arranged at one end of the mounting member along the X direction away from the second limiting portion, and the second guide matching portion extending along the X direction;

[0007] The first limiting portion stops at the second limiting portion so that the battery module is limited on the mounting member, the second positioning portion is detachably connected to the first positioning portion so that the battery module is fixed on the mounting member, and the first guide fitting portion is arranged on the second guide fitting portion, and the first guide fitting portion is slidable relative to the second guide fitting portion.

[0008] According to the battery pack of the embodiment of the present invention, the present invention can limit one end of the battery module on the mounting member by setting a first limiting portion and a second limiting portion, and stopping the first limiting portion against the second limiting portion; by setting a first positioning portion and a second positioning portion, and detachably connecting the second positioning portion to the first positioning portion, the other end of the battery module can be positioned on the mounting member; by setting a first guide fitting portion and a second guide fitting portion, the first guide fitting portion is set on the second guide fitting portion, and the first guide fitting portion is slidable relative to the second guide fitting portion, so that the battery module can be easily installed on the mounting member. In this way, both ends of the battery module are fixed on the mounting member, and the fixing method is simple and easy, which avoids creep failure between the components of the battery module caused by shaking during transportation to the greatest extent, and greatly improves the alignment ability of the battery module and the battery box, improves the work efficiency of installation, fixation and maintenance of the battery module, and thus improves the battery performance of the battery pack.

[0009] In addition, the battery pack according to the above embodiment of the present invention may also have the following additional technical features:

[0010] In some embodiments of the present invention, the battery module includes a plurality of battery cells arranged at intervals, the main body portion is arranged between adjacent battery cells, and the main body portion is perpendicular to the fixing portion.

[0011] In some embodiments of the present invention, the first guide matching portion is arranged at the middle section area of ​​the fixing portion along the Y direction, the first limiting portion is arranged at the two end areas of the fixing portion along the Y direction, and the first positioning portion is arranged at the two end areas of the fixing portion along the Y direction, the Y direction is the width direction or the length direction of the battery pack, and the Y direction is perpendicular to the X direction.

[0012] In some embodiments of the present invention, the second limiting portion includes a U-shaped folding portion and a limiting column, the U-shaped folding portion includes a first extension portion, a connecting portion, and a second extension portion connected in sequence, and the limiting column is connected between the first extension portion and the second extension portion; the first limiting portion includes a limiting groove, the limiting groove passes through the fixing portion along the height direction of the battery pack, and the inner side wall of the limiting groove contacts the outer side wall of the limiting column, so that the first limiting portion can be clamped on the limiting column, and the limiting groove is limited between the first extension portion and the second extension portion.

[0013] In some embodiments of the present invention, along the height direction of the battery pack, the difference between the size of the limiting column and the size of the limiting groove is 0.5mm-1.5mm.

[0014] In some embodiments of the present invention, the first positioning portion includes a positioning hole, which passes through the fixing portion along the height direction of the battery pack; the second positioning portion includes a positioning column, which can pass through the mounting member along the height direction of the battery pack, and the inner wall of the positioning hole contacts the outer wall of the positioning column so that the positioning column can be fixed in the positioning hole.

[0015] In some embodiments of the present invention, the first guide fitting portion includes a guide groove, and the second guide fitting portion includes a guide protrusion, and the guide protrusion is slidably disposed in the guide groove so that the battery module can slide on the mounting member.

[0016] In some embodiments of the present invention, along the height direction of the battery pack, the size of the guide protrusion is larger than the size of the guide groove.

[0017] In some embodiments of the present invention, along the height direction of the battery pack, the difference between the size of the guide protrusion and the size of the guide groove is 0.5 mm-1.5 mm.

[0018] In some embodiments of the present invention, the mounting member comprises a mounting plate.

[0019] In some embodiments of the present invention, the main body portion includes a liquid cooling plate, and the fixing portion includes a fixing plate.

[0020] In some embodiments of the present invention, the main body portion and the fixing portion are integrally formed or welded together.

[0021] In a second aspect of the present invention, the present invention provides an energy storage device. According to an embodiment of the present invention, the energy storage device has a battery pack as described in the above embodiment. Thus, the work efficiency of fixing and maintaining the energy storage device is improved, and the battery performance of the battery pack is improved.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A top view of

[0026] Figure 3 is a schematic structural diagram of a mounting member according to an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

[0028] Figure 5 yes Figure 1 An enlarged schematic diagram of the P region;

[0029] Figure 6 yes Figure 5 A cross-sectional view of

[0030] Figure 7 yes Figure 1 An enlarged cross-sectional schematic diagram of the Q region;

[0031] Figure 8 is an enlarged cross-sectional schematic diagram of the matching of the guide groove and the guide protrusion in an embodiment of the present invention;

[0032] Fig. 9 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present invention;

[0033] Fig.10 It is a schematic diagram of the structure of the energy storage device according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] 1000-battery pack; 100-battery module; 110-cooling component; 111-main body; 111-1-water inlet; 111-2-water inlet area; 111-3-water return area; 111-4-drainage part; 111-5-water outlet; 111-6-partition part; 111-7-sealing component; 112-fixing part; 112-1-first limiting part; 112-2-first positioning part, 112-3-first guide matching part; 120-battery cell; 200-mounting component; 210-second limiting part; 211-U-shaped folding part; 211-1-first extension part; 211-2-connecting part; 211-3-second extension part; 212-limiting column; 220-second positioning part; 230-second guide matching part. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] In one aspect of the present invention, the present invention provides a battery pack 1000. In an embodiment of the present invention, referring to the attached Figure 1 , 2, 3 and 8, the battery pack 1000 includes: at least one battery module 100, the battery module 100 is provided with a cooling member 110, the cooling member 110 includes a main body portion 111 and a fixing portion 112 connected to each other, the fixing portion 112 is arranged at the bottom side of the battery module 100 and extends along the X direction, the fixing portion 112 includes a first limiting portion 112-1, a first positioning portion 112-2 and a first guide matching portion 112-3, the first limiting portion 112-1 is arranged at one end of the fixing portion 112 along the X direction, the first positioning portion 112-2 is arranged at one end of the fixing portion 112 along the X direction away from the first limiting portion 112-1, and the first guide matching portion 112-3 is extended along the X direction, and the X direction is the length direction or width direction of the battery pack 1000; a mounting member 200, the mounting member 200 The battery module 100 includes a second limiting portion 210, a second positioning portion 220 and a second guide matching portion 230. The second limiting portion 210 is arranged at one end of the mounting member 200 along the X direction. The second positioning portion 220 is arranged at one end of the mounting member 200 along the X direction away from the second limiting portion 210. The second guide matching portion 230 is extended along the X direction. The first limiting portion 112-1 stops at the second limiting portion 210 so that the battery module 100 is limited on the mounting member 200. The second positioning portion 220 is detachably connected to the first positioning portion 112-2 so that the battery module 100 is fixed on the mounting member 200. The first guide matching portion 112-3 is arranged on the second guide matching portion 230, and the first guide matching portion 112-3 is slidable relative to the second guide matching portion 230. In this way, both ends of the battery module 100 are fixed on the mounting member 200, and the fixing method is simple and easy, which can avoid creep failure between the components of the battery module caused by shaking during transportation to the greatest extent, and greatly improve the alignment ability of the battery module 100 and the battery box, and improve the work efficiency of installation, fixation and maintenance of the battery module 100, thereby improving the battery performance of the battery pack 1000.

[0042] The following is a detailed explanation of how the above-mentioned battery pack can achieve the above-mentioned beneficial effects:

[0043] The present invention sets a first limiting portion 112-1 and a second limiting portion 210, and stops the first limiting portion 112-1 against the second limiting portion 210, so that one end of the battery module 100 can be limited on the mounting member 200; sets a first positioning portion 112-2 and a second positioning portion 220, and detachably connects the second positioning portion 220 to the first positioning portion 112-2, so that the other end of the battery module 100 can be positioned on the mounting member 200; sets the first guide fitting portion 112-3 on the second guide fitting portion 230, and the first guide fitting portion 112-3 is slidable relative to the second guide fitting portion 230, which is conducive to easily installing the battery module 100 on the mounting member 200, and is conducive to realizing the disassembly of the battery module 100 and the mounting member 200, thereby significantly improving the alignment capability of the battery module and the battery box, and is conducive to improving the work efficiency of the battery module installation.

[0044] Specifically, the first guide matching portion 112-3 of the cooling component 110 is set on the second guide matching portion 230 of the mounting member 200, and the first guide matching portion 112-3 is slidable relative to the second guide matching portion 230, that is, the cooling component 110 can be moved on the mounting member 200. When one end of the cooling component 110 moves to the edge area of ​​the mounting member 200, the first limiting portion 112-1 of the cooling component 110 will stop at the second limiting portion 210 of the mounting member 200, thereby limiting one end of the battery module 100 on the mounting member 200. At the same time, when one end of the cooling component 110 moves to the edge area of ​​the mounting member 200, the second positioning portion 220 of the cooling component 110 will be detachably connected to the first positioning portion 112-2, thereby positioning the other end of the battery module 100 on the mounting member 200. In this way, both ends of the battery module 100 are fixed on the mounting member 200, and the fixing method is simple and easy, which can avoid creep failure between the components of the battery module caused by shaking during transportation to the greatest extent, and greatly improve the alignment ability of the battery module 100 and the battery box, and improve the work efficiency of installation, fixation and maintenance of the battery module 100, thereby improving the battery performance of the battery pack 1000.

[0045] According to some specific embodiments of the present invention, Figure 4 The battery module 100 includes a plurality of battery cells 120 that are spaced apart from each other. The main body 111 is disposed between adjacent battery cells 120 , and the main body 111 is perpendicular to the fixing portion 112 . Thus, the main body 111 is disposed between adjacent battery cells 120 , thereby increasing the contact area between the cooling element 110 and the battery cells 120 , and further ensuring a good cooling effect of the cooling element 110 on the battery module 100 .

[0046] According to some further specific embodiments of the present invention, Figure 1 ,2 and 8, the first guide matching portion 112-3 is arranged at the middle section area of ​​the fixing portion 112 along the Y direction, the first limiting portion 112-1 is arranged at the two end areas of the fixing portion 112 along the Y direction, and the first positioning portion 112-2 is arranged at the two end areas of the fixing portion 112 along the Y direction. The Y direction is the width direction or the length direction of the battery pack 1000, and the Y direction is perpendicular to the X direction. For example, if the X direction is the length direction of the battery pack 1000, then the Y direction is the width direction of the battery pack 1000. Therefore, the first guide matching portion 112-3 is arranged in the middle area of ​​the above-mentioned fixed portion 112 along the Y direction, which further ensures that the battery module 100 can be installed on the mounting member 200 by sliding, and the convenience of installing the battery module is further improved; by arranging the first limiting portion 112-1 and the first positioning portion 112-2 at the two end areas of the fixed portion 112 along the Y direction, the battery module 100 can be more easily limited and positioned on the mounting member 200, which greatly improves the convenience of installing the battery module.

[0047] In an embodiment of the present invention, the type of the second limiting portion 210 is not particularly limited, and it can mainly limit the battery module 100 on the mounting member 200. As a preferred solution, the second limiting portion 210 may include a cone that is thicker on the top and thinner on the bottom, or a folding member with upper and lower positioning.

[0048] It should be noted that: Figure 1-10 The Z direction is the height direction of the battery pack 1000.

[0049] According to some further specific embodiments of the present invention, Figure 5 and 6The second limiting portion 210 includes a U-shaped folding portion 211 and a limiting column 212. The U-shaped folding portion 211 includes a first extending portion 211-1, a connecting portion 211-2 and a connecting portion 211-3 connected in sequence. The limiting column 212 is connected between the first extending portion 211-1 and the connecting portion 211-3. The first limiting portion 112-1 includes a limiting groove. The limiting groove penetrates the fixing portion 112 along the height direction of the battery pack 1000, and the inner side wall of the limiting groove contacts the outer side wall of the limiting column 212, so that the first limiting portion 112-1 can be stuck on the limiting column 212, and the limiting groove is limited on the upper Between the first extension portion 211-1 and the above-mentioned connecting portion 211-3, thereby, by setting the inner wall of the limiting groove to contact the outer wall of the limiting column 212, so that the above-mentioned first limiting portion 112-1 can be stuck on the above-mentioned limiting column 212, the battery module 100 and the mounting member 200 can be positioned along the X direction and the Y direction; by limiting the limiting groove between the first extension portion 211-1 and the connecting portion 211-3, the battery module 100 and the mounting member 200 can be positioned along the height direction of the above-mentioned battery pack 1000, thereby realizing the positioning of the battery module 100 and the mounting member 200 along the X direction, the Y direction and the height direction of the above-mentioned battery pack 1000.

[0050] According to some further specific embodiments of the present invention, Figure 5 and 6 , along the height direction of the battery pack 1000, the difference between the size of the limiting column 212 and the size of the limiting groove is 0.5mm-1.5mm. Therefore, by controlling the difference between the size of the limiting column 212 and the size of the limiting groove within the above range, it can ensure that the battery module 100 and the mounting member 200 are well positioned along the height direction of the battery pack 1000, and is also conducive to the actual installation operation. If the size of the limiting column 212 is equal to the size of the limiting groove, it may be difficult to position and match the limiting column 212 with the limiting groove in actual operation. If the size of the limiting column 212 and the size of the limiting groove are too large, the positioning effect of the battery module 100 and the mounting member 200 along the height direction of the battery pack 1000 will be poor.

[0051] According to some further specific embodiments of the present invention, Figure 5 and 6 The above-mentioned limiting column 212 is cylindrical, and the diameter of the above-mentioned limiting column 212 is 5mm-30mm. Therefore, the diameter of the above-mentioned limiting column 212 is controlled within the above-mentioned range, which further ensures that the limiting column 212 is easy to be positioned and matched with the limiting groove, thereby improving the working efficiency of positioning the battery module 100 and the mounting member 200.

[0052] According to some further specific embodiments of the present invention, Figure 3 The above-mentioned limiting groove is arc-shaped, and the angle of the above-mentioned arc-shaped limiting groove is 90°-180°, preferably 145°-180°, and more preferably 180°. Therefore, the limiting groove can be easily positioned and matched with the limiting column 212, further improving the working efficiency of positioning the battery module 100 and the mounting member 200.

[0053] In an embodiment of the present invention, the material of the above-mentioned limit column 212 is not particularly limited, and technical personnel in this field can choose it according to actual conditions. As a preferred solution, the material of the above-mentioned limit column 212 can be aluminum alloy, thereby ensuring that the limit column 212 has a large strength and is not prone to breakage.

[0054] According to some further specific embodiments of the present invention, Figure 1 , 2 and 7, the first positioning portion 112-2 includes a positioning hole, which passes through the fixing portion 112 along the height direction of the battery pack 1000, and the second positioning portion 220 includes a positioning column, which can pass through the mounting member 200 along the height direction of the battery pack 1000, and the inner wall of the positioning hole contacts the outer wall of the positioning column so that the positioning column can be fixed in the positioning hole, thereby, the positioning hole is easy to contact with the first positioning portion 112-2, and then the positioning of the battery module 100 and the mounting member 200 is easy to achieve.

[0055] In the embodiments of the present invention, in the prior art, the battery module 100 is usually first set on the battery box (mounting member 200), and then at least 4 bolts are used to fix the battery module 100 on the battery box. At least 4 bolts are used to fix the battery module 100 on the battery box. Shaking or oscillation occurs during transportation, and creep failure may occur between the bolts and the fixed battery module 100. Creep failure may also occur between the components of the battery module 100, thereby affecting the battery performance. The present invention realizes the positioning of the battery module 100 and the mounting member 200 along the X direction and the Y direction by setting the inner side wall of the limiting groove to contact the outer side wall of the limiting column; by limiting the limiting groove between the first extension portion 112-1 and the connecting portion 211-2, the positioning of the battery module 100 and the mounting member 200 along the X direction, the Y direction and the height direction of the battery pack 1000 is realized, thereby realizing the positioning of one end of the battery module 100 and the mounting member 200. Since the installation process necessarily requires that at least one end of the fixed part is a free end, and then the free end is locked, so that efficient and practical installation can be achieved, the present application adopts a positioning column to pass through the positioning hole to realize the positioning of the other end of the battery module and the mounting part, thereby achieving both ends of the battery module 100 to be fixed on the mounting part 200, and the fixing method is simple and easy, which avoids the creep failure between the components of the battery module caused by shaking during transportation to the greatest extent, and greatly improves the alignment ability of the battery module 100 and the battery box, and improves the work efficiency of installation, fixation and maintenance of the battery module 100, thereby improving the battery performance of the battery pack 1000.

[0056] In an embodiment of the present invention, the type of the above-mentioned positioning hole is not particularly limited, as long as one end of the battery module 100 can be fixed on the mounting member 200. As a preferred solution, the above-mentioned positioning hole includes a circular hole or an elliptical hole, and is more preferably an elliptical hole. Therefore, when the positioning hole is an elliptical hole, the accumulation of tolerances of the components of the battery pack 1000 can be avoided, making it difficult for the positioning column to pass through the positioning hole for positioning.

[0057] In an embodiment of the present invention, the type of the second positioning portion 220 is not particularly limited, as long as one end of the battery module 100 can be fixed on the mounting member 200 through the positioning hole. As a preferred solution, the second positioning portion 220 is a clamp, a bolt or a screw.

[0058] According to some further specific embodiments of the present invention, Figure 8The first guide fitting portion 112-3 includes a guide groove, and the second guide fitting portion 230 includes a guide protrusion, which is slidably arranged in the guide groove. This further ensures that the battery module 100 can be installed on the mounting member 200 by sliding, which greatly improves the convenience of installing the battery module 100, improves the work efficiency of installing, fixing and maintaining the battery module 100, and thus improves the battery performance of the battery pack 1000.

[0059] In an embodiment of the present invention, the material of the first guide fitting part 112-3 and the second guide fitting part 230 is not particularly limited, and those skilled in the art can make a choice according to actual conditions. As a preferred solution, the material of the first guide fitting part 112-3 and the second guide fitting part 230 can be aluminum alloy, thereby further ensuring that the battery module 100 can be installed on the mounting part 200 by sliding, which greatly improves the convenience of installing the battery module 100 and improves the work efficiency of installing, fixing and maintaining the battery module 100.

[0060] According to some further specific embodiments of the present invention, Figure 8 Along the height direction of the battery pack 1000, the size of the guide protrusion is larger than the size of the guide groove, which ensures that the guide groove cooperates with the guide protrusion so that the battery module 100 can slide on the mounting member 200, and avoids the other parts of the first guide matching portion 112-3 (except the rest of the guide protrusion) and the other parts of the second guide portion (except the rest of the guide groove) being too close, making it too difficult to slide the battery module 100.

[0061] According to some further specific embodiments of the present invention, Figure 8 Along the height direction of the battery pack 1000, the difference between the size of the guide protrusion and the size of the guide groove is 0.5mm-1.5mm. Therefore, the difference between the size of the guide protrusion and the size of the guide groove is controlled within the above range, further ensuring that the guide protrusion is slidably arranged in the guide groove, so that the battery module 100 can slide on the mounting member 200, and avoiding the other parts of the first guide matching portion 112-3 (except the rest of the guide protrusion) and the other parts of the second guide portion (except the rest of the guide groove) being too close, making it too difficult to slide the battery module 100.

[0062] In the embodiment of the present invention, the type of the above-mentioned mounting member 200 is not particularly limited, and those skilled in the art can arbitrarily select it according to actual conditions. As a preferred solution, the above-mentioned mounting member 200 can be a mounting plate.

[0063] According to some further specific embodiments of the present invention, the main body 111 may be a liquid cooling plate, and the fixing portion 112 may be a fixing plate, thereby ensuring that the main body 111 has a good cooling effect on the battery module 100, and positioning the fixing portion 112 and the mounting member 200, thereby achieving positioning of the battery module 100 and the mounting member 200.

[0064] In an embodiment of the present invention, the connection method between the main body 111 and the fixing part 112 is not particularly limited, and those skilled in the art may make any selection according to actual conditions. As a preferred solution, the connection method between the main body 111 and the fixing part 112 includes one-piece molding and welding connection.

[0065] In the embodiments of the present invention, referring to the attached Fig. 9 The principle of liquid cooling of the battery module 100 by the main body 111 (liquid cooling plate) is as follows: the liquid cooling plate is provided with a water inlet 111-1, a water inlet area 111-2, a water return area 111-3, a drainage portion 111-4, a water outlet 111-5, a partition portion 111-6, and a sealing member 111-7. When the coolant enters the water inlet area 111-2 from the water inlet 111-1, the coolant enters the water return area 111-3 as the liquid level increases. As the liquid level further increases, the coolant overflows the drainage portion 111-4 and communicates with the water outlet 111-5, and then flows from the water outlet 111-5 to the liquid cooling unit.

[0066] Due to the presence of the drainage portion 111-4, the coolant can only go out from the water outlet 111-5 when the coolant level is higher than the drainage portion 111-4, that is, when the coolant fills the return water area 111-3. At this time, all the air in the return water area 111-3 is discharged and filled with coolant, so that the cooling effect of the liquid cooling plate is better and the safety of the battery module 100 is improved. The bypass connection portion 211-2 is used to separate the water inlet area 111-2 and the return water area 111-3 to improve the cooling effect of the liquid cooling plate, and the seal 111-7 is used to achieve the sealing of the coolant to avoid affecting the performance of the battery module 100.

[0067] In a second aspect of the present invention, the present invention provides an energy storage device. Fig.10 The energy storage device has the battery pack 1000 of the above embodiment. Thus, the work efficiency of fixing and maintaining the energy storage device is improved, and the battery performance of the battery pack 1000 is improved.

[0068] Specifically, the energy storage device may include at least one of an electric energy storage device for the power generation side of the power system, an electric energy storage device for the distribution side of the power system (such as an electrochemical energy storage device), and an electric energy storage device for the user side of the power system.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A battery pack, characterized in that: include: at least one battery module, wherein a cooling member is provided inside the battery module, wherein the cooling member comprises a main body portion and a fixing portion connected to each other, wherein the fixing portion is arranged at the bottom side of the battery module and extends along the X direction, wherein the fixing portion comprises a first limiting portion, a first positioning portion and a first guiding matching portion, wherein the first limiting portion is arranged at one end of the fixing portion along the X direction, the first positioning portion is arranged at one end of the fixing portion along the X direction away from the first limiting portion, and the first guiding matching portion is extended along the X direction, wherein the X direction is the length direction or the width direction of the battery pack; A mounting member, the mounting member comprising a second limiting portion, a second positioning portion and a second guide matching portion, the second limiting portion being arranged at one end of the mounting member along the X direction, the second positioning portion being arranged at one end of the mounting member along the X direction away from the second limiting portion, and the second guide matching portion extending along the X direction; The first limiting portion stops at the second limiting portion so that the battery module is limited on the mounting member, the second positioning portion is detachably connected to the first positioning portion so that the battery module is fixed on the mounting member, and the first guide fitting portion is arranged on the second guide fitting portion, and the first guide fitting portion is slidable relative to the second guide fitting portion.

2. The battery pack according to claim 1, characterized in that: The battery module includes a plurality of battery cells arranged at intervals, the main body is arranged between adjacent battery cells, and the main body is perpendicular to the fixing portion.

3. The battery pack according to claim 1, characterized in that: The first guide matching portion is arranged at the middle section area of ​​the fixing portion along the Y direction, the first limiting portion is arranged at the two end areas of the fixing portion along the Y direction, and the first positioning portion is arranged at the two end areas of the fixing portion along the Y direction. The Y direction is the width direction or the length direction of the battery pack, and the Y direction is perpendicular to the X direction.

4. The battery pack according to claim 1, characterized in that: The second limiting portion includes a U-shaped folding portion and a limiting column, the U-shaped folding portion includes a first extending portion, a connecting portion, and a second extending portion connected in sequence, and the limiting column is connected between the first extending portion and the second extending portion; The first limiting portion includes a limiting groove, which passes through the fixing portion along the height direction of the battery pack, and the inner side wall of the limiting groove contacts the outer side wall of the limiting column, so that the first limiting portion can be clamped on the limiting column, and the limiting groove is limited between the first extension portion and the second extension portion.

5. The battery pack according to claim 4, characterized in that: Along the height direction of the battery pack, the difference between the size of the limiting column and the size of the limiting groove is 0.5mm-1.5mm.

6. The battery pack according to claim 1, characterized in that: The first positioning portion includes a positioning hole, and the positioning hole penetrates the fixing portion along the height direction of the battery pack; The second positioning portion includes a positioning column, and the positioning column can penetrate the mounting member along the height direction of the battery pack, and the inner side wall of the positioning hole contacts the outer side wall of the positioning column.

7. The battery pack according to claim 1, characterized in that: The first guide matching portion includes a guide groove, and the second guide matching portion includes a guide protrusion, and the guide protrusion is slidably arranged in the guide groove so that the battery module can slide on the mounting member.

8. The battery pack according to claim 7, characterized in that: Along the height direction of the battery pack, the size of the guide protrusion is larger than the size of the guide groove.

9. The battery pack according to claim 8, characterized in that: Along the height direction of the battery pack, the difference between the size of the guide protrusion and the size of the guide groove is 0.5mm-1.5mm.

10. The battery pack according to any one of claims 1 to 9, characterized in that: The mounting member includes a mounting plate.

11. The battery pack according to any one of claims 1 to 9, characterized in that: The main body portion includes a liquid cooling plate, and the fixing portion includes a fixing plate.

12. The battery pack according to any one of claims 2 to 9, characterized in that: The main body portion and the fixing portion are integrally formed or welded together.

13. An energy storage device, characterized in that: A battery pack comprising any one of claims 1 to 12.

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