Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a box body, a battery module and a liquid cooling plate assembly, the battery module is located in the box body, the battery module comprises a first battery module and a second battery module which are stacked in the vertical direction, and the first battery module comprises a first sub-battery module and a second sub-battery module which are arranged in the horizontal direction; the liquid cooling plate assembly comprises a liquid cooling plate and a first partition plate located on one side of the liquid cooling plate, the liquid cooling plate is located between the first battery module and the second battery module, the first partition plate is located between the first sub-battery module and the second sub-battery module, the liquid cooling plate is provided with a liquid cooling flow channel, and the first partition plate is provided with a liquid inlet pipe and a liquid outlet pipe which are both communicated with the liquid cooling flow channel. According to the battery pack disclosed by the utility model, the liquid inlet pipe and the liquid outlet pipe of the liquid cooling plate are integrated on the first partition plate, and meanwhile, the first partition plate can also play a role in fixing the first battery module, so that the assembly process of the first partition plate can be omitted, the production process is simplified, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] Most batteries use a single-layer module design, which cannot meet the power demand. For example, commercial vehicles do not have sufficient X- and Y-direction dimensions, but have sufficient Z-direction dimensions, so double-layer modules are usually used.

[0003] In the related art, the battery adopts a double-layer battery module layout. The battery cooling device has many liquid cooling pipes and occupies a large space, which affects the placement space of the battery module and makes the assembly complicated, which is not conducive to the simplification of the assembly process. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery pack, in which the liquid inlet pipe and the liquid outlet pipe of the liquid cooling plate are integrated into the first partition, and the first partition can also play the role of fixing the first sub-battery module and the second sub-battery module, which can save the assembly process of the first partition, simplify the production process, and improve the assembly efficiency.

[0005] The utility model also provides an electric device with a battery pack.

[0006] A battery pack according to an embodiment of the first aspect of the utility model includes: a box body; a battery module, wherein the battery module is located in the box body, the battery module includes a first battery module and a second battery module stacked in an up-and-down direction, the first battery module includes a first sub-battery module and a second sub-battery module arranged in a horizontal direction; a liquid cooling plate assembly, wherein the liquid cooling plate assembly includes a liquid cooling plate and a first partition located on one side of the liquid cooling plate, the liquid cooling plate is located between the first battery module and the second battery module, the first partition is located between the first sub-battery module and the second sub-battery module, the liquid cooling plate has a liquid cooling channel, and the first partition has a liquid inlet pipe and a liquid outlet pipe both connected to the liquid cooling channel.

[0007] According to the battery pack of the embodiment of the utility model, the liquid cooling plate assembly includes a liquid cooling plate and a first partition. The liquid cooling plate is used to heat or cool the first battery module and the second battery module at the same time. The first partition has a liquid inlet pipe and a liquid outlet pipe connected to the liquid cooling channel. The liquid inlet pipe and the liquid outlet pipe of the liquid cooling plate are integrated into the first partition. At the same time, the first partition can also fix the first sub-battery module and the second sub-battery module, which can save the assembly process of the first partition, simplify the production process, and improve the assembly efficiency.

[0008] According to some embodiments of the present invention, the liquid cooling plate is an integrally formed part.

[0009] According to some embodiments of the present invention, the liquid cooling plate assembly also includes a first end plate and a second end plate respectively connected to the two ends of the liquid cooling plate, the liquid cooling channel passes through the side walls at both ends of the liquid cooling plate to form a first liquid cooling port and a second liquid cooling port, the first end plate is used to seal the first liquid cooling port, and the second end plate is used to seal the second liquid cooling port.

[0010] According to some embodiments of the present invention, the first end plate and the second end plate are respectively located on both sides of the length direction of the first battery module.

[0011] According to some embodiments of the present invention, the liquid cooling plate has a first heat exchange area and a second heat exchange area spaced apart along a length direction of the liquid cooling plate, and the first partition plate is located between the first heat exchange area and the second heat exchange area.

[0012] According to some embodiments of the present invention, the first heat exchange zone includes a first heat exchange channel and a second heat exchange channel that are not connected to each other and are arranged along the width direction of the liquid cooling plate; the second heat exchange zone includes a third heat exchange channel and a fourth heat exchange channel that are not connected to each other and are arranged along the width direction of the liquid cooling plate.

[0013] According to some embodiments of the utility model, the liquid cooling plate has a first liquid inlet pipe and a second liquid inlet pipe connected to the liquid inlet pipe, and the liquid cooling plate also has a first liquid outlet pipe and a second liquid outlet pipe connected to the liquid outlet pipe; the first liquid inlet pipe is connected to the first heat exchange channel and the third heat exchange channel, the second liquid inlet pipe is connected to the second heat exchange channel and the fourth heat exchange channel, the first liquid outlet pipe is connected to the first heat exchange channel and the third heat exchange channel, and the second liquid outlet pipe is connected to the second heat exchange channel and the fourth heat exchange channel.

[0014] According to some embodiments of the utility model, a groove is provided on one side of the bottom plate of the box body close to the second battery module, the groove extends along the length direction of the bottom plate, and the second battery module is spaced apart from the bottom wall of the groove.

[0015] According to some embodiments of the present invention, a first temperature collecting component is provided on the first battery module, and a second temperature collecting component is provided on the second battery module. The first temperature collecting component and the second temperature collecting component are symmetrically arranged on both sides of the liquid cooling plate.

[0016] The electrical equipment according to the second aspect of the present invention comprises the battery pack according to the first aspect of the present invention.

[0017] According to the electrical equipment of the embodiment of the utility model, by setting the above-mentioned battery pack, the liquid inlet pipe and the liquid outlet pipe of the liquid cooling plate are integrated into the first partition. At the same time, the first partition can also play the role of fixing the first sub-battery module and the second sub-battery module, which can save the assembly process of the first partition, simplify the production process, and improve the assembly efficiency of the battery pack.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 is an exploded view of a battery pack according to some embodiments of the present invention;

[0021] Figure 2 is a schematic diagram of a liquid cooling plate according to some embodiments of the present utility model;

[0022] Figure 3 is a schematic diagram of a liquid cooling channel of a liquid cooling plate according to some embodiments of the utility model;

[0023] Figure 4 is a schematic diagram of a base plate according to some embodiments of the utility model;

[0024] Figure 5 is a schematic diagram of the heat preservation rate of the battery pack before and after the bottom plate is improved according to some embodiments of the utility model;

[0025] Figure 6 It is a schematic diagram of the temperature rise and temperature difference of the battery pack before and after the position of the temperature acquisition component is changed according to some embodiments of the present invention.

[0026] Reference numerals:

[0027] 100. battery pack; 101. box body;

[0028] 10. Battery module; 11. First battery module; 111. First sub-battery module; 112. Second sub-battery module; 12. Second battery module; 121. Third sub-battery module; 122. Fourth sub-battery module;

[0029] 20. Liquid cooling plate assembly; 21. Liquid cooling plate; 211. First heat exchange zone; 2111. First heat exchange channel; 2112. Second heat exchange channel; 212. Second heat exchange zone; 2121. Third heat exchange channel; 2122. Fourth heat exchange channel; 22. First partition plate; 23. First end plate; 24. Second end plate; 25. Liquid inlet pipe; 251. First liquid inlet pipe; 252. Second liquid inlet pipe; 26. Liquid outlet pipe; 261. First liquid outlet pipe; 262. Second liquid outlet pipe;

[0030] 31. Bottom plate; 311. Groove; 32. Second partition plate; 33. Third end plate; 34. Fourth end plate; 35. Heat insulating member; 36. First thermal conductive adhesive. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Reference below Figure 1-Figure 6 A battery pack 100 according to an embodiment of the present invention is described.

[0035] According to the battery pack 100 of the first embodiment of the utility model, it includes a box body 101; the battery module 10 is located in the box body 101, and the box body 101 can provide an installation space for the battery module 10. The box body 101 can be used to protect the battery module 10 from damage by the external environment, and can improve the safety of the battery module 10.

[0036] The battery module 10 includes a first battery module 11 and a second battery module 12 stacked in the vertical direction, the first battery module 11 includes a first sub-battery module 111 and a second sub-battery module 112 arranged in the horizontal direction, and the second battery module 12 includes a third sub-battery module 121 and a fourth sub-battery module 122 arranged in the horizontal direction. A first partition plate 22 needs to be provided between the first sub-battery module 111 and the second sub-battery module 112 to space and fix the first sub-battery module 111 and the second sub-battery module 112; a second partition plate 32 needs to be provided between the third sub-battery module 121 and the fourth sub-battery module 122 to space and fix the third sub-battery module 121 and the fourth sub-battery module 122.

[0037] In the present application, the liquid cooling plate assembly 20 includes a liquid cooling plate 21 and a first partition plate 22. The liquid cooling plate 21 is located between the first battery module 11 and the second battery module 12. The liquid cooling plate 21 has a liquid cooling channel in which a coolant flows, which is used to heat or cool the first battery module 11 and the second battery module 12 at the same time.

[0038] The first partition 22 is located on one side of the liquid cooling plate 21, and the first partition 22 is located between the first sub-battery module 111 and the second sub-battery module 112. The first partition 22 also has a liquid inlet pipe 25 and a liquid outlet pipe 26 that are connected to the liquid cooling channel. The first partition 22 can not only integrate the liquid inlet pipe 25 and the liquid outlet pipe 26 of the liquid cooling plate 21, but also play a role in fixing the first sub-battery module 111 and the second sub-battery module 112. At the same time, there is no need to assemble the first partition 22, which can simplify the production process and improve assembly efficiency.

[0039] In a specific example, a first thermally conductive adhesive is provided between the first battery module 11 and the liquid cooling plate 21 , and a second thermally conductive adhesive 36 is provided between the second battery module 12 and the liquid cooling plate 21 , for increasing the heat exchange rate of the liquid cooling plate 21 .

[0040] According to the battery pack 100 of the embodiment of the utility model, the liquid cooling plate assembly 20 includes a liquid cooling plate 21 and a first partition 22. The liquid cooling plate 21 is used to heat or cool the first battery module 11 and the second battery module 12 at the same time. The first partition 22 has a liquid inlet pipe 25 and a liquid outlet pipe 26 that are connected to the liquid cooling channel. The liquid inlet pipe 25 and the liquid outlet pipe 26 of the liquid cooling plate 21 are integrated into the first partition 22. At the same time, the first partition 22 can also fix the first sub-battery module 111 and the second sub-battery module 112, which can save the assembly process of the first partition 22, simplify the production process, and improve assembly efficiency.

[0041] According to some embodiments of the present invention, referring to Figure 1-Figure 3 The liquid cooling plate 21 is an integrally formed part. The liquid cooling plate 21 is processed by a profile to construct a liquid cooling channel in the liquid cooling plate 21, so that the two sides of the liquid cooling plate 21 can be kept flat, which is convenient for applying thermal conductive glue on the two sides of the liquid cooling plate 21, and the yield rate during glue application can be improved; at the same time, the contact area between the liquid cooling plate 21 and the first battery module 11 and the second battery module 12 can be increased, thereby improving the heating or cooling efficiency of the liquid cooling plate 21 on the first battery module 11 and the second battery module 12.

[0042] According to some embodiments of the present invention, referring to Figure 1-Figure 3 The liquid cooling plate 21 is formed by a profile processing method to construct a liquid cooling channel in the liquid cooling plate 21, and the liquid cooling channel has a first liquid cooling port and a second liquid cooling port, and the first liquid cooling port and the second liquid cooling port respectively penetrate the side walls at both ends of the liquid cooling plate 21; when the liquid cooling plate 21 is formed by a profile processing method, it is inevitable to process the first liquid cooling port and the second liquid cooling port at both ends of the liquid cooling plate 21.

[0043] In the related art, an end plate is provided between the battery module 10 and the box body 101 for fixing the battery module 10. In the present application, the liquid cooling plate assembly 20 further includes a first end plate 23 and a second end plate 24, which are respectively connected to the two ends of the liquid cooling plate 21, the first end plate 23 is used to block the first liquid cooling port, and the second end plate 24 is used to block the second liquid cooling port. The first end plate 23 and the second end plate 24 are respectively connected to the two ends of the liquid cooling plate 21, and the first end plate 23 and the second end plate 24 can also play a role in fixing the battery module 10, without the need to assemble the end plates, which can simplify the production process and improve the assembly efficiency.

[0044] For example, the first end plate 23 and the second end plate 24 may be fixed to the two ends of the liquid cooling plate 21 by welding.

[0045] According to some embodiments of the present invention, referring to Figure 1-Figure 4The first end plate 23 and the second end plate 24 are respectively located on both sides of the length direction of the first battery module 11 , and the first end plate 23 and the second end plate 24 are used to fix the first battery module 11 in the box body 101 .

[0046] In a specific example, referring to Figure 1 A third end plate 33 and a fourth end plate 34 are provided on both sides of the second battery module 12 in the length direction. The third end plate 33 and the fourth end plate 34 are used to fix the second battery module 12 in the box body 101 .

[0047] A heat insulating member 35 is arranged between the first end plate 23 and the first sub-battery module 111, and a heat insulating member 35 is also arranged between the second end plate 24 and the second sub-battery module 112; a heat insulating member 35 is also arranged between one side of the first partition plate 22 and the first sub-battery module 111, and a heat insulating member 35 is also arranged between the other side of the first partition plate 22 and the second sub-battery module 112; a heat insulating member 35 is also arranged between the third end plate 33 and the third sub-battery module 121, and a heat insulating member 35 is also arranged between the fourth end plate 34 and the fourth sub-battery module 122; a heat insulating member 35 is also arranged between one side of the second partition plate 32 and the third sub-battery module 121, and a heat insulating member 35 is also arranged between the other side of the second partition plate 32 and the fourth sub-battery module 122; the heat insulating member 35 can reduce the rate at which the battery module 10 is transferred to the external environment, thereby improving the thermal insulation performance of the battery pack 100.

[0048] According to some embodiments of the present invention, referring to Figure 1-Figure 3 The liquid cooling plate 21 has a first heat exchange area 211 and a second heat exchange area 212 spaced apart along the length direction of the liquid cooling plate 21, and the first partition plate 22 is located between the first heat exchange area 211 and the second heat exchange area 212. The first heat exchange area 211 and the second heat exchange area 212 are not connected to each other, which can avoid the long flow distance of the coolant in the liquid cooling channel, resulting in a temperature difference in the battery module 10, thereby reducing the temperature difference of the battery module 10. The first heat exchange area 211 can heat or cool the first sub-battery module 111 and the third sub-battery module 121 at the same time, and the second heat exchange area 212 can heat or cool the second sub-battery module 112 and the fourth sub-battery module 122 at the same time.

[0049] According to some embodiments of the present invention, referring to Figure 1-Figure 3The first heat exchange zone 211 includes a first heat exchange channel 2111 and a second heat exchange channel 2112 that are not connected to each other and are arranged along the width direction of the liquid cooling plate 21, which can prevent the coolant from flowing a long distance in the first heat exchange zone 211, resulting in a temperature difference between the first sub-battery module 111 and the third sub-battery module 121. The first heat exchange zone 211 is configured to have the first heat exchange channel 2111 and the second heat exchange channel 2112 arranged side by side, which can reduce the temperature difference between the first sub-battery module 111 and the third sub-battery module 121.

[0050] The second heat exchange area 212 includes a third heat exchange channel 2121 and a fourth heat exchange channel 2122 that are not connected to each other and are arranged along the width direction of the liquid cooling plate 21, which can prevent the coolant from flowing a long distance in the second heat exchange area 212, resulting in a temperature difference between the second sub-battery module 112 and the fourth sub-battery module 122. The second heat exchange area 212 is configured as the third heat exchange channel 2121 and the fourth heat exchange channel 2122 arranged side by side, which can reduce the temperature difference between the second sub-battery module 112 and the fourth sub-battery module 122.

[0051] According to some embodiments of the present invention, referring to Figure 1-Figure 3 The liquid cooling plate 21 has a first liquid inlet pipe 251 and a second liquid inlet pipe 252, both of which are connected to the liquid inlet pipe 25. The liquid cooling plate 21 also has a first liquid outlet pipe 261 and a second liquid outlet pipe 262, both of which are connected to the liquid outlet pipe 26. The first liquid inlet pipe 251, the second liquid inlet pipe 252, the first liquid outlet pipe 261 and the second liquid outlet pipe 262 are all integrated onto the first partition plate 22.

[0052] The first liquid inlet pipe 251 is connected to the first heat exchange channel 2111 and the third heat exchange channel 2121, the second liquid inlet pipe 252 is connected to the second heat exchange channel 2112 and the fourth heat exchange channel 2122, the first liquid outlet pipe 261 is connected to the first heat exchange channel 2111 and the third heat exchange channel 2121, and the second liquid outlet pipe 262 is connected to the second heat exchange channel 2112 and the fourth heat exchange channel 2122.

[0053] The cooling liquid can flow to the first liquid inlet pipe 251 and the second liquid inlet pipe 252 through the liquid inlet pipe 25, and the cooling liquid in the first liquid inlet pipe 251 can flow to the first heat exchange channel 2111 and the third heat exchange channel 2121. The liquid cooling liquid can flow in the first heat exchange channel 2111 and the third heat exchange channel 2121 to heat or cool the battery module 10; after the heat exchange is completed, the liquid cooling liquid in the first heat exchange channel 2111 and the third heat exchange channel 2121 can flow to the liquid outlet pipe 26 through the first liquid outlet pipe 261. The cooling liquid in the second liquid inlet pipe 252 can flow to the second heat exchange channel 2112 and the fourth heat exchange channel 2122. The liquid cooling liquid can flow in the second heat exchange channel 2112 and the fourth heat exchange channel 2122 to heat or cool the battery module 10. After the heat exchange is completed, the liquid cooling liquid in the second heat exchange channel 2112 and the fourth heat exchange channel 2122 can flow to the liquid outlet pipe 26 through the second liquid outlet pipe 262.

[0054] According to some embodiments of the present invention, referring to Figure 1 , Figure 4-Figure 5 A groove 311 is provided on one side of the bottom plate 31 of the box body 101 near the second battery module 12. The groove 311 extends along the length direction of the bottom plate 31. The second battery module 12 is spaced apart from the bottom wall of the groove 311. After the battery pack 100 is assembled, there is air in the groove 311. Since the heat conductivity of air is low, the heat exchange rate of the second battery module 12 is reduced, and the heat preservation performance of the second battery module 12 can be improved.

[0055] In a specific example, referring to Figure 5 The battery pack 100 without the groove 311 on the bottom plate 31 and the battery pack 100 with the groove 311 on the bottom plate 31 of the box 101 are placed in an environment with a temperature of -20°C at the same time. Figure 5-1 The red curve represents the drop in the maximum temperature of the battery pack 100 within 6 hours (wherein h is hours), and the blue curve represents the drop in the minimum temperature of the battery pack 100 within 6 hours. Figure 5-1 As we know, the average cooling rate within 6 h is 3.64 °C / h; Figure 5-2 The red curve represents the drop in the maximum temperature of the battery pack 100 within 6 hours, and the blue curve represents the drop in the minimum temperature of the battery pack 100 within 6 hours. Figure 5-2 As known, the average cooling rate within 6 hours is 3.46°C / h; from the data, it can be seen that providing a groove 311 on the bottom plate 31 of the box body 101 can reduce the cooling rate of the battery pack 100, thereby improving the thermal insulation effect of the battery pack 100.

[0056] According to some embodiments of the present invention, referring to Figure 1 , Figure 6 The first battery module 11 is provided with a first temperature collection component, and the second battery module 12 is provided with a second temperature collection component. The first temperature collection component and the second temperature collection component are symmetrically arranged on both sides of the liquid cooling plate 21, that is, the distance from the first temperature collection component to the upper surface of the liquid cooling plate 21 is equal to the distance from the second temperature collection component to the lower surface of the liquid cooling plate 21, which can reduce the temperature difference between the temperature of the first battery module 11 collected by the first temperature collection component and the temperature of the second battery module 12 collected by the second temperature collection component.

[0057] The heat exchange capacity between the temperature collection component and the liquid cooling plate 21 can be expressed by the thermal resistance R, R=R1+R2+R3. In the heat transfer direction in the up and down directions, R1 is the heat exchange thermal resistance between the position of the temperature collection component and the liquid cooling plate 21, R2 is the thermal resistance of the thermal conductive glue, and R3 is the thermal resistance of the liquid cooling plate 21 itself, wherein R1=d / λ, d is the distance from the temperature collection component to the liquid cooling plate 21, and λ is the thermal conductivity of the battery module 10. When R1 and R2 remain unchanged, and when the structure of the battery module 10 itself remains unchanged, the thermal resistance R is related to d. If the distance d1 from the first temperature collection component to the upper surface of the liquid cooling plate 21 is equal to the distance d2 from the second temperature collection component to the lower surface of the liquid cooling plate 21, then the heat exchange capacity between the first temperature collection component and the liquid cooling plate 21 is equal to the heat exchange capacity between the second temperature collection component and the liquid cooling plate 21, which can reduce the temperature difference between the temperature of the first battery module 11 collected by the first temperature collection component and the temperature of the second battery module 12 collected by the second temperature collection component.

[0058] In a specific example, the second temperature collection component is arranged adjacent to the explosion-proof valve of the second battery module 12, the explosion-proof valve of the second battery module 12 is arranged close to the bottom plate 31 of the box 101, and the first temperature collection component is arranged adjacent to the explosion-proof valve of the first battery module 11. The placement position of the first temperature collection component is the same as the placement position of the second temperature collection component. The first battery module 11 is turned over as a whole and placed in the box 101, so that the distance from the first temperature collection component to the upper surface of the liquid cooling plate 21 is equal to the distance from the second temperature collection component to the lower surface of the liquid cooling plate 21.

[0059] Reference Figure 6 , Figure 6-1 is the temperature difference of the battery pack 100 under low temperature heating without turning over the first battery module 11. The red curve represents the temperature rise of the highest temperature of the battery pack 100 within 2 hours, the blue curve represents the temperature rise of the lowest temperature of the battery pack 100 within 2 hours, and the light-colored curve represents the temperature difference between the highest temperature and the lowest temperature of the battery pack 100 within 2 hours. Figure 6-1 As we know, the maximum temperature difference within 2 hours is 18℃.

[0060] Figure 6-2The temperature difference of the battery pack 100 of the present application under low temperature heating, the red curve represents the temperature rise of the highest temperature of the battery pack 100 within 2 hours, the blue curve represents the temperature rise of the lowest temperature of the battery pack 100 within 2 hours, and the light-colored curve represents the temperature difference between the highest temperature and the lowest temperature of the battery pack 100 within 2 hours. Figure 6-2 As is known, the maximum temperature difference within 2 hours is 11°C; from the data, it can be seen that symmetrically arranging the first temperature collection component and the second temperature collection component on both sides of the liquid cooling plate 21 can reduce the temperature difference between the highest temperature and the lowest temperature of the battery pack 100.

[0061] The electric device according to the embodiment of the second aspect of the utility model includes the battery pack 100 according to the embodiment of the first aspect of the utility model.

[0062] According to the electrical equipment of the embodiment of the utility model, by setting the above-mentioned battery pack 100, the liquid inlet pipe 25 and the liquid outlet pipe 26 of the liquid cooling plate 21 are integrated into the first partition 22. At the same time, the first partition 22 can also play a role in fixing the first sub-battery module 111 and the second sub-battery module 112, which can save the assembly process of the first partition 22, simplify the production process, and improve the assembly efficiency of the battery pack 100.

[0063] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: Box; A battery module, the battery module is located in the box, the battery module includes a first battery module and a second battery module stacked in a vertical direction, the first battery module includes a first sub-battery module and a second sub-battery module arranged in a horizontal direction; A liquid cooling plate assembly, the liquid cooling plate assembly comprising a liquid cooling plate and a first partition located on one side of the liquid cooling plate, the liquid cooling plate being located between the first battery module and the second battery module, the first partition being located between the first sub-battery module and the second sub-battery module, the liquid cooling plate having a liquid cooling channel, the first partition having a liquid inlet pipe and a liquid outlet pipe both connected to the liquid cooling channel.

2. The battery pack according to claim 1, characterized in that: The liquid cooling plate is an integrally formed part.

3. The battery pack according to claim 1, characterized in that: The liquid cooling plate assembly also includes a first end plate and a second end plate respectively connected to both ends of the liquid cooling plate, the liquid cooling channel passes through the side walls at both ends of the liquid cooling plate to form a first liquid cooling port and a second liquid cooling port, the first end plate is used to block the first liquid cooling port, and the second end plate is used to block the second liquid cooling port.

4. The battery pack according to claim 3, characterized in that: The first end plate and the second end plate are respectively located on both sides of the length direction of the first battery module.

5. The battery pack according to claim 1, characterized in that: The liquid cooling plate has a first heat exchange area and a second heat exchange area spaced apart along a length direction of the liquid cooling plate, and the first partition plate is located between the first heat exchange area and the second heat exchange area.

6. The battery pack according to claim 5, characterized in that: The first heat exchange zone includes a first heat exchange channel and a second heat exchange channel that are not connected to each other and are arranged along the width direction of the liquid cooling plate; the second heat exchange zone includes a third heat exchange channel and a fourth heat exchange channel that are not connected to each other and are arranged along the width direction of the liquid cooling plate.

7. The battery pack according to claim 6, characterized in that: The liquid cooling plate has a first liquid inlet pipe and a second liquid inlet pipe connected to the liquid inlet pipe, and the liquid cooling plate also has a first liquid outlet pipe and a second liquid outlet pipe connected to the liquid outlet pipe; The first liquid inlet pipe is connected to the first heat exchange channel and the third heat exchange channel, the second liquid inlet pipe is connected to the second heat exchange channel and the fourth heat exchange channel, the first liquid outlet pipe is connected to the first heat exchange channel and the third heat exchange channel, and the second liquid outlet pipe is connected to the second heat exchange channel and the fourth heat exchange channel.

8. The battery pack according to claim 1, characterized in that: A groove is provided on one side of the bottom plate of the box body close to the second battery module. The groove extends along the length direction of the bottom plate. The second battery module is spaced apart from the bottom wall of the groove.

9. The battery pack according to claim 1, characterized in that: The first battery module is provided with a first temperature collecting component, the second battery module is provided with a second temperature collecting component, and the first temperature collecting component and the second temperature collecting component are symmetrically arranged on both sides of the liquid cooling plate.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1-9.

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