Single battery and battery module

Abstract

The utility model belongs to the technical field of batteries, and discloses a single battery and a battery module, the single battery comprises a battery cell body and a battery cell shell, the battery cell shell comprises a plurality of wall bodies, the plurality of wall bodies are enclosed to form an accommodating cavity, the battery cell body is arranged in the accommodating cavity, at least one of the plurality of wall bodies is a temperature adjusting wall, the temperature adjusting wall comprises at least one heat pipe, and the heat pipe is arranged in the accommodating cavity. Therefore, the cooling efficiency and / or the heating efficiency of the battery cell body are / is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have developed rapidly, and higher requirements have been put forward for new energy vehicles in the market, such as increased cruising range, improved safety performance, and reduced charging time. Among them, thermal management, as an important part of improving battery performance, restricts the rapid development of new energy vehicles.

[0003] In the existing battery thermal management technology, a water-cooling plate and a heating element are usually arranged in a battery box. When cooling the battery cells, the heat generated by the battery cell body is transferred to the water-cooling plate through the battery cell shell, and then taken away by the cooling medium in the water-cooling plate; when heating the battery cells, the heat generated by the heating element is transferred to the battery cell body through the battery cell shell. The battery cell shell is usually made of a metal material, and its heat transfer coefficient is low, resulting in the heat generated by the battery cell body not being able to be quickly dissipated. Especially for fast-charging batteries with high heat dissipation requirements, the above thermal management method cannot meet their heat dissipation needs; similarly, the heat generated by the heating element cannot be quickly transferred to the battery cell body, resulting in the battery cell body not being able to be quickly heated, and the above thermal management method cannot meet its heating needs.

[0004] Therefore, it is urgent to propose a single battery and a battery module to solve the above technical problems. Summary of the Utility Model

[0005] The first object of the utility model is to provide a single battery, which can improve the cooling efficiency and / or heating efficiency of the battery cell body.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A single battery, comprising:

[0008] A battery cell body;

[0009] A battery cell shell, the battery cell shell includes a plurality of wall bodies, the plurality of wall bodies enclose to form an accommodation cavity, the battery cell body is arranged in the accommodation cavity, and at least one of the plurality of wall bodies is a temperature-adjusting wall, and the temperature-adjusting wall includes at least one heat pipe.

[0010] Optionally, the number of temperature-adjusting walls is two or more, and two or more temperature-adjusting walls form at least one temperature-adjusting wall group, and the heat pipes of any one temperature-adjusting wall in the same temperature-adjusting wall group are communicated with the heat pipes of at least one of the remaining temperature-adjusting walls.

[0011] Optionally, in the same temperature-adjusting wall group, at least one heat pipe of one of the adjacent two temperature-adjusting walls is communicated with at least one heat pipe of the other.

[0012] Optionally, the temperature regulating wall group includes a first temperature regulating wall and N second temperature regulating walls. The first temperature regulating wall is formed by splicing N first temperature regulating sub-walls. The N second temperature regulating walls are arranged adjacent to the N first temperature regulating sub-walls in one-to-one correspondence. At least one heat pipe in at least one of the second temperature regulating walls is communicated with at least one heat pipe in the corresponding first temperature regulating sub-wall. N≥2 and N is an integer;

[0013] The number of the first temperature regulating walls is one;

[0014] Or, the number of the first temperature regulating walls is two, and the N second temperature regulating walls are located between the two first temperature regulating walls.

[0015] Optionally, in the same temperature regulating wall group, the number of the heat pipes of two adjacent temperature regulating walls is equal and they are communicated with each other in one-to-one correspondence;

[0016] And / or, in the same temperature regulating wall group, the extending directions of the heat pipes of two adjacent temperature regulating walls are perpendicular to each other.

[0017] Optionally, the number of the heat pipes of the second temperature regulating wall and the corresponding first temperature regulating sub-wall is equal and they are communicated with each other in one-to-one correspondence;

[0018] And / or, the extending directions of the heat pipes of the second temperature regulating wall and the corresponding first temperature regulating sub-wall are perpendicular to each other.

[0019] Optionally, the number of the temperature regulating walls is two or more. The two or more temperature regulating walls include independent temperature regulating walls, and the heat pipes of the independent temperature regulating walls are not communicated with the heat pipes of all the other temperature regulating walls;

[0020] And / or, the wall body other than the temperature regulating wall is a heat conducting wall.

[0021] Optionally, the wall body includes a first end wall body, a second end wall body and a side wall body. The first end wall body and the second end wall body are arranged opposite to each other. The first end wall body, the second end wall body and the side wall body enclose an accommodation cavity. A pole column is arranged on the first end wall body. The second end wall body is a temperature regulating wall, and the extending direction of the heat pipe of the second end wall body is parallel to the surface of the second end wall body.

[0022] Optionally, the first end wall body and the second end wall body are parallel to each other. The side wall body is perpendicular to the first end wall body. The side wall body includes at least one temperature regulating wall, and the extending direction of the heat pipe of the temperature regulating wall is perpendicular to the first end wall body.

[0023] The second object of the present invention is to provide a battery module, which can improve the cooling efficiency and / or heating efficiency of the battery cell body.

[0024] To achieve this object, the present invention adopts the following technical solutions:

[0025] The battery module includes a heat exchange source and the above-mentioned single battery. The heat exchange source is in direct contact or indirect contact with the temperature regulating wall. The heat exchange source is a cold source and / or a heat source.

[0026] Advantages of the present utility model:

[0027] At least one of the multiple walls of the battery cell housing is a temperature regulating wall, and the temperature regulating wall includes at least one heat pipe. Compared with using the battery cell housing as an intermediate component for heat transfer, for the single battery provided by the present utility model, at least one of the multiple walls of the battery cell housing is set as a temperature regulating wall, enabling heat exchange between the battery cell body and the heat pipe of the temperature regulating wall, shortening the heat transfer path, and improving the cooling efficiency and / or heating efficiency of the battery cell body. Moreover, the thermal conductivity of the heat pipe is much greater than that of common metal materials, which can further improve the cooling efficiency and / or heating efficiency of the battery cell body.

[0028] The battery module provided by the present utility model adopts the above single battery, and a heat exchange source is arranged on the basis of direct heat exchange between the heat pipe and the battery cell body, having the effect of further improving the cooling efficiency and / or heating efficiency of the battery cell body. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the battery module provided in Embodiment 1 Figure 1 ;

[0030] Figure 2 is Figure 1 a cross-sectional view taken along the A-A direction in

[0031] Figure 3 is Figure 1 a cross-sectional view taken along the B-B direction in

[0032] Figure 4 is a schematic diagram of the flow direction of the working fluid in the heat pipe of the temperature regulating wall provided in Embodiment 1

[0033] Figure 5 is a schematic structural diagram of the battery module provided in Embodiment 1 Figure 2 ;

[0034] Figure 6 is a cross-sectional view of the battery module provided in Embodiment 2

[0035] Figure 7 is a schematic diagram of the flow direction of the working fluid in the heat pipe of the temperature regulating wall group provided in Embodiment 2

[0036] Figure 8 is a cross-sectional view of the battery module provided in Embodiment 3

[0037] Figure 9 is a schematic diagram of the flow direction of the working fluid in the heat pipe of the temperature regulating wall group provided in Embodiment 3

[0038] Figure 10 is a cross-sectional view of the battery module provided in Embodiment 4

[0039] Figure 11 It is a schematic diagram of the flow direction of the working fluid in the heat pipe of the second temperature-adjusting wall provided in the fourth embodiment and the corresponding first temperature-adjusting partition wall.

[0040] Figure 12 It is a schematic diagram of the structure of the battery module provided in the fifth embodiment.

[0041] Figure 13 It is Figure 12 The cross-sectional view in the C-C direction in

[0042] Figure 14 It is Figure 12 The cross-sectional view in the D-D direction in

[0043] Figure 15 It is a schematic diagram of the flow direction of the working fluid in the heat pipe of the temperature-adjusting wall provided in the fifth embodiment.

[0044] Figure 16 It is a schematic diagram of the structure of the battery module provided in the sixth embodiment.

[0045] Figure 17 It is Figure 16 The cross-sectional view in the E-E direction in

[0046] Figure 18 It is a schematic diagram of the flow direction of the working fluid in the heat pipes of the second temperature-adjusting wall and the two corresponding first temperature-adjusting partition walls provided in the sixth embodiment.

[0047] Figure 19 It is a schematic diagram of the structure of the battery module provided in the seventh embodiment.

[0048] Figure 20 It is Figure 19 The cross-sectional view in the F-F direction in

[0049] Figure 21 It is a schematic diagram of the flow direction of the working fluid in the heat pipes of the temperature-adjusting wall group provided in the seventh embodiment.

[0050] Figure 22 It is a schematic diagram of the structure of the battery module provided in the eighth embodiment.

[0051] Figure 23 It is a schematic diagram of the cross-sectional structure of the single battery provided in the eighth embodiment.

[0052] Figure 24 It is a schematic diagram of the structure of the battery module provided in the ninth embodiment.

[0053] In the figure:

[0054] 1. Single battery; 2. Heat exchange source;

[0055] 11. Battery cell body; 111. Positive electrode sheet; 112. Negative electrode sheet; 113. Separator; 12. Battery cell case; 121. Temperature regulating wall; 1211. Heat pipe; 122. Temperature regulating wall group; 1221. First temperature regulating wall; 12211. First temperature regulating sub-wall; 1222. Second temperature regulating wall; 123. First end wall body; 124. Second end wall body; 125. Side wall body; 126. Heat conducting wall; 13. Terminal; 14. Explosion-proof valve; 15. Electrolyte. Detailed implementation manners

[0056] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0057] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0058] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0059] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0060] Embodiment 1

[0061] This embodiment provides a single cell, which can improve the cooling efficiency and / or heating efficiency of the cell body.

[0062] Specifically, as Figures 1 to 4 shown, the single cell 1 includes a cell body 11 and a cell shell 12. Among them, the cell shell 12 includes a plurality of wall bodies, and the plurality of wall bodies enclose to form a receiving cavity. The cell body 11 is arranged in the receiving cavity. At least one of the plurality of wall bodies is a temperature-regulating wall 121, and the temperature-regulating wall 121 includes at least one heat pipe 1211.

[0063] Based on the above design, at least one of the plurality of wall bodies of the cell shell 12 is a temperature-regulating wall 121, and the temperature-regulating wall 121 includes at least one heat pipe 1211. Compared with using the cell shell 12 as an intermediate component for heat transfer, for the single cell 1 provided by the present utility model, at least one of the plurality of wall bodies of the cell shell 12 is set as the temperature-regulating wall 121, so that the cell body 11 exchanges heat with the heat pipe 1211 of the temperature-regulating wall 121, shortening the heat transfer path and improving the cooling efficiency and / or heating efficiency of the cell body 11. Secondly, the heat conduction performance of the heat pipe 1211 is much greater than that of common metal materials, which can further improve the cooling efficiency and / or heating efficiency of the cell body 11. Thirdly, the heat transfer coefficient of the heat pipe 1211 is positively correlated with the temperature difference between the two states before and after the phase change of the working fluid in the heat pipe 1211. That is, when the temperature-regulating wall 121 cools the cell body 11 and the temperature of the cell body 11 is higher, the more heat the working fluid in the heat pipe 1211 absorbs, making the temperature difference between the two states before and after the phase change of the working fluid in the heat pipe 1211 larger, and then the heat transfer coefficient of the heat pipe 1211 is larger. Similarly, when the temperature-regulating wall 121 heats the cell body 11 and the temperature of the cell body 11 is lower, the more heat the working fluid in the heat pipe 1211 transfers to the cell body 11, making the temperature difference between the two states before and after the phase change of the working fluid in the heat pipe 1211 larger, and then the heat transfer coefficient of the heat pipe 1211 is larger, which is beneficial to improving the thermal management performance of the battery system, especially capable of meeting the fast-charging battery with large heat dissipation requirements.

[0064] It should be noted that the specific structure and working principle of the heat pipe 1211 are both prior arts in the field. Exemplarily, the heat pipe 1211 includes a pipe shell, end caps, and a wick. Among them, the pipe shell is mostly a seamless steel pipe, which has a certain structural strength and good heat conduction characteristics. Therefore, the temperature-adjusting wall 121 can be used as the wall of the battery cell shell 12. The end caps are hermetically covered at the openings of the pipe shell. The wick is arranged inside the pipe shell, and the pipe shell is filled with a phase-change medium. The phase-change medium is usually a medium that is liquid at normal temperature (15°C - 30°C) (such as one or more of acetone, ammonia, and water). The medium evaporates into a gas when heated, and the gaseous medium condenses into a liquid after heat dissipation. That is to say, in the absence of other cold sources or heat sources, the heat pipe 1211 can absorb and release heat through the phase change of the medium, thereby realizing the cooling and heating of the battery cell body 11.

[0065] As Figures 1 to 4 shown, in this embodiment, the single battery 1 is square. The wall includes a first end wall 123, a second end wall 124, and four side walls 125. A pole 13 and an explosion-proof valve 14 are provided on the first end wall 123. The first end wall 123 and the second end wall 124 are opposite and parallel to each other. The side walls 125 are perpendicular to the first end wall 123. The first end wall 123, the second end wall 124, and the four side walls 125 enclose a containing cavity, and the containing cavity is filled with an electrolyte 15. The battery cell body 11 is immersed in the electrolyte 15. The battery cell body 11 includes a plurality of positive electrode plates 111, a plurality of negative electrode plates 112, and a separator 113. The plurality of positive electrode plates 111 and the plurality of negative electrode plates 112 are alternately stacked, and the separator 113 is sandwiched between an adjacent positive electrode plate 111 and a negative electrode plate 112. Of course, in other embodiments, the single battery 1 can also be cylindrical or polygonal prism-shaped, etc.

[0066] Furthermore, as Figures 1 to 4 shown, in this embodiment, the number of the temperature-adjusting walls 121 is one. The temperature-adjusting wall 121 is one of the four side walls 125, and the temperature-adjusting wall 121 has at least one heat pipe 1211. Exemplarily, the number of the heat pipes 1211 of the temperature-adjusting wall 121 can be one, ten, twenty, etc. Of course, in other embodiments, the temperature-adjusting wall 121 can also be the first end wall 123 and / or the second end wall 124, and the number of the temperature-adjusting walls 121 can also be three, five, seven, eight, etc.

[0067] Optionally, as Figures 1 to 4As shown, the wall other than the temperature-adjusting wall 121 is the heat-conducting wall 126. Taking the case where the temperature of the battery cell body 11 is relatively high as an example, the battery cell body 11 can dissipate heat through the following paths: Path 1, the battery cell body 11 transfers heat to the heat-conducting wall 126, and the heat-conducting wall 126 then transfers the heat to the external environment; Path 2, the battery cell body 11 transfers heat to the temperature-adjusting wall 121, and the working fluid in the heat pipe 1211 of the temperature-adjusting wall 121 absorbs the heat of the battery cell body 11, causing the working fluid to evaporate into a gaseous state; Path 3, the battery cell body 11 transfers heat to the heat-conducting wall 126. After the heat-conducting wall 126 absorbs the heat of the battery cell body 11, its temperature rises. Then, the heat-conducting wall 126 transfers the heat to the temperature-adjusting wall 121, and the working fluid in the heat pipe 1211 of the temperature-adjusting wall 121 absorbs the heat of the heat-conducting wall 126 and evaporates into a gaseous state. It should be noted that during the process of the heat pipe 1211 absorbing the heat of the battery cell body 11, due to the phase change medium absorbing heat and undergoing a phase change, the temperature of the heat pipe 1211 is relatively low. While the temperature of the heat-conducting wall 126 starts to rise after absorbing the heat of the battery cell body 11. Therefore, on the premise that both the temperature-adjusting wall 121 and the heat-conducting wall 126 absorb the heat of the battery cell body 11, the heat-conducting wall 126 can still transfer the heat to the temperature-adjusting wall 121.

[0068] When the temperature of the battery cell body 11 is relatively low, its heat absorption paths are the following three: Path 1, the heat-conducting wall 126 absorbs the heat of the external environment, and the heat-conducting wall 126 transfers the heat to the battery cell body 11; Path 2, the working fluid in the heat pipe 1211 of the temperature-adjusting wall 121 transfers the heat to the battery cell body 11 and condenses into a liquid state; Path 3, the working fluid in the heat pipe 1211 of the temperature-adjusting wall 121 transfers the heat to the heat-conducting wall 126 and condenses into a liquid state, and the heat-conducting wall transfers the heat to the battery cell body 11.

[0069] Furthermore, the heat-conducting wall 126 is made of one or more of aluminum, copper, steel, and alloy materials. The heat-conducting wall 126 and the temperature-adjusting wall 121 can be fixedly connected by welding or other means.

[0070] This embodiment also provides a battery module, which can improve the cooling efficiency and / or heating efficiency of the battery cell body 11.

[0071] Specifically, as Figures 1 to 4As shown, the battery module includes a heat exchange source 2 and the above-mentioned single battery 1, and the heat exchange source 2 is in direct or indirect contact with the temperature regulating wall 121, and the heat exchange source 2 is a cold source and / or a hot source. The battery module adopts the above-mentioned single battery 1, and the heat exchange source 2 is arranged on the basis of the heat pipe 1211 directly exchanging heat with the battery cell body 11, which has the effect of further improving the cooling efficiency and / or heating efficiency of the battery cell body 11. In addition, in this embodiment, the temperature regulating wall 121 is used as the wall of the battery cell shell 12 to provide support for the battery cell body 11, eliminating at least one metal wall surface of the traditional battery cell shell 12, thereby reducing the overall weight of the battery module, which is beneficial to improving the energy density of the battery module.

[0072] Furthermore, if Figures 1 to 4 As shown, the heat exchange source 2 is plate-shaped, and the plate-shaped heat exchange source 2 is attached to the second end wall 124 and is perpendicular to the side wall 125, that is, the heat exchange source 2 is perpendicular to the temperature adjustment wall 121, and the extension direction of at least one heat pipe 1211 of the temperature adjustment wall 121 is perpendicular to the heat exchange source 2. In this embodiment, the extension directions of all the heat pipes 1211 of the temperature adjustment wall 121 are perpendicular to the heat exchange source 2.

[0073] Optionally, a heat exchange coating is provided on the temperature regulating wall 121 to improve the heat exchange efficiency between the temperature regulating wall 121 and the heat exchange source 2 and / or the external environment.

[0074] It should be pointed out that the heat exchange source 2 in this embodiment is in indirect contact with the temperature control wall 121 (the heat exchange source 2 is in contact with the second end wall 124, not with the temperature control wall 121). In other implementation schemes, the heat exchange source 2 may also be in direct contact with the temperature control wall 121, that is, the heat exchange source 2 is in contact with the temperature control wall 121.

[0075] like Figures 1 to 4 As shown, in this embodiment, the plate-shaped heat exchange source 2 is located above the single battery 1, the second end wall 124 is located above the first end wall 123, the heat exchange source 2 is attached to the side of the second end wall 124 away from the first end wall 123, and the temperature adjustment wall 121 is one of the four side walls 125, the heat exchange source 2 is a cold source such as a liquid cold plate, the medium in the heat pipe 1211 absorbs the heat of the battery body 11 and then evaporates into a gaseous state and flows upward, the heat of the gaseous medium is transferred to the cold source through the second end wall 124 and then condensed into a liquid state, and the liquid medium flows downward in the heat pipe 1211. This structural design can improve the heat exchange efficiency between the heat exchange source 2 and the gaseous medium in the heat pipe 1211, thereby improving the cooling effect of the temperature adjustment wall 121 on the battery body 11.

[0076] In another embodiment, the second end wall body 124 is located below the first end wall body 123. The heat exchange source 2 is attached to the side of the second end wall body 124 facing away from the first end wall body 123, and the heat exchange source 2 is a heat source. The heat emitted by the heat exchange source 2 is transmitted to the heat pipe 1211 through the second end wall body 124. After the medium in the heat pipe 1211 absorbs the heat emitted by the heat exchange source 2, it evaporates into a gas and flows upward. After the gaseous medium emits heat to the battery cell body 11, it condenses into a liquid, and the liquid medium flows downward in the heat pipe 1211. This structural design can improve the heat exchange efficiency between the heat exchange source 2 and the liquid medium in the heat pipe 1211, and thus improve the heating effect of the temperature adjustment wall 121 on the battery cell body 11. It can be understood that when the second end wall body 124 is located above the first end wall body 123, the heat exchange source 2 is attached to the side of the first end wall body 123 facing away from the second end wall body 124, and the heat exchange source 2 is a heat source, the phase change of the medium in the heat pipe 1211 is the same as when the second end wall body 124 is located below the first end wall body 123, the heat exchange source 2 is attached to the side of the second end wall body 124 facing away from the first end wall body 123, and the heat exchange source 2 is a heat source. The difference is that since the pole post 13 is provided on the side of the first end wall body 123 facing away from the second end wall body 124, a clearance hole corresponding to the position of the pole post 13 can be opened on the heat exchange source 2 at this time.

[0077] In still another embodiment, the heat exchange source 2 can be either a cold source or a heat source. For example, the heat exchange source 2 is a heat exchange plate with a liquid working medium flowing inside. When the battery cell body 11 needs to be cooled, a low-temperature liquid working medium such as cold water is introduced into the heat exchange plate. At this time, the heat exchange source 2 is a cold source; when the battery cell body 11 needs to be heated, a high-temperature liquid working medium such as hot water is introduced into the heat exchange plate. At this time, the heat exchange source 2 is a heat source.

[0078] In yet another embodiment, the number of heat exchange sources 2 is two, and one of the heat exchange sources 2 is a cold source and the other heat exchange source 2 is a heat source. The second end wall body 124 is located above the first end wall body 123. The cold source is attached to the side of the second end wall body 124 facing away from the first end wall body 123, and the heat source is attached to the side of the first end wall body 123 facing away from the second end wall body 124. In practical applications, heat exchange can be carried out with the cold source and the heat source according to requirements.

[0079] The battery module provided in this embodiment can include one of the above-mentioned single cells 1, or can include multiple of the above-mentioned single cells 1 (such as two, six, or eight, etc.). Figure 1 The figure shows a schematic structural diagram of the battery module when the number of single cells 1 is one. Figure 5 The figure shows a schematic structural diagram of the battery module when the number of single cells 1 is multiple.

[0080] Embodiment 2

[0081] This embodiment provides a single cell 1 and a battery module. The differences between this embodiment and the previous embodiments will be mainly described below, and the same parts will not be elaborated.

[0082] In this embodiment, the number of temperature regulating walls 121 is two or more. Two or more temperature regulating walls 121 form at least one temperature regulating wall group 122. The heat pipes 1211 of any one temperature regulating wall 121 in the same temperature regulating wall group 122 are communicated with the heat pipes 1211 of at least one temperature regulating wall 121 among the remaining temperature regulating walls 121. The design of two or more temperature regulating walls 121 increases the number of temperature regulating walls 121 in the cell case 12, and has the effect of further improving the cooling efficiency and / or heating efficiency of the cell body 11.

[0083] As Figure 6 and Figure 7 shown, in this embodiment, the number of temperature regulating walls 121 is two, and these two temperature regulating walls 121 form a temperature regulating wall group 122. Of course, in other embodiments, the number of temperature regulating walls 121 can also be three, four, five, etc., and the number of temperature regulating wall groups 122 can also be two, three, four, etc.

[0084] Furthermore, in the same temperature regulating wall group 122, at least one heat pipe 1211 of one of the adjacent two temperature regulating walls 121 is communicated with at least one heat pipe 1211 of the other. As a preferred solution, in the same temperature regulating wall group 122, the number of heat pipes 1211 of the adjacent two temperature regulating walls 121 is equal and they are communicated one by one. In actual production, a plurality of mutually parallel heat pipes 1211 are sequentially joined and fixed to form a heat pipe 1211 array plate, and then the heat pipe 1211 array plate is bent once to form a temperature regulating wall group 122. It can be seen that this structural design is beneficial to simplifying the production process of the temperature regulating wall group 122, and has the effects of improving production efficiency and reducing production costs. In addition, the medium in the same heat pipe 1211 flows from one temperature regulating wall 121 to another temperature regulating wall 121 (that is, the media in the heat pipes 1211 of the same temperature regulating wall group 122 are shared), which improves the temperature uniformity of these two temperature regulating walls 121. It can be seen that this structural design can also improve the temperature uniformity of the temperature regulating walls 121 in the same temperature regulating wall group 122, making the temperature of the cell body 11 relatively uniform.

[0085] Even further, as Figure 6 and Figure 7 shown, in the same temperature regulating wall group 122, the extending directions of the heat pipes 1211 of the adjacent two temperature regulating walls 121 are perpendicular to each other. In actual production, the heat pipe 1211 array plate is bent by 90° to form a temperature regulating wall group 122. This structural design is beneficial to improving the consistency of the bending angles of different bending batches.

[0086] Optionally, asFigure 6 and Figure 7 As shown in Figure 7 , the wall body includes a first end wall body 123, a second end wall body 124, and a side wall body 125. The first end wall body 123 and the second end wall body 124 are arranged opposite to each other. The first end wall body 123, the second end wall body 124, and the side wall body 125 enclose to form a receiving cavity. A terminal post 13 is provided on the first end wall body 123. The second end wall body 124 is a temperature control wall 121. The extending direction of the heat pipe 1211 of the second end wall body 124 is parallel to the surface of the second end wall body 124. Further, the first end wall body 123 and the second end wall body 124 are parallel to each other, the side wall body 125 is perpendicular to the first end wall body 123. The side wall body 125 includes a temperature control wall 121. The extending direction of the heat pipe 1211 of this temperature control wall 121 is perpendicular to the first end wall body 123, and this temperature control wall 121 and the second end wall body 124 form a temperature control wall group 122.

[0087] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single cell 1. The heat exchange source 2 is in direct contact or indirect contact with the temperature control wall 121. The heat exchange source 2 is a cold source and / or a heat source.

[0088] Optionally, as Figure 6 and Figure 7 shown in Figure 7 , the heat exchange source 2 is plate-shaped. The plate-shaped heat exchange source 2 is attached to the second end wall body 124 and is perpendicular to the side wall body 125. In this embodiment, the heat exchange source 2 is in direct contact with the temperature control wall 121 (the heat exchange source 2 is attached to the second end wall body 124). In other embodiments, the heat exchange source 2 can also be in indirect contact with the temperature control wall 121. For example, the heat exchange source 2 is attached to the first end wall body 123 or the side wall body 125 that is not the temperature control wall 121.

[0089] As Figure 6 and Figure 7 shown in Figure 7 , in this embodiment, the heat exchange source 2 is located above the single cell 1, the second end wall body 124 is located above the first end wall body 123. The heat exchange source 2 is attached to the side of the second end wall body 124 facing away from the first end wall body 123, and the heat exchange source 2 is a cold source. The medium in the heat pipes 1211 of the side wall body 125 and the heat pipes 1211 of the second end wall body 124 absorbs the heat of the cell body 11 and evaporates into a gas and flows upward. In the heat pipes 1211 of the second end wall body 124, the gaseous medium transfers the heat to the cold source and condenses into a liquid and flows downward. Part of the liquid medium continues to absorb heat and evaporate in the heat pipes 1211 of the second end wall body 124, and the remaining liquid medium flows back into the heat pipes 1211 of the side wall body 125 to continue to absorb heat and evaporate.

[0090] It should be noted that, under normal circumstances, in order to ensure the smooth endothermic evaporation of the medium in the heat pipe 1211, too much phase change medium will not be filled in the heat pipe 1211. In this embodiment, only the heat pipe 1211 of the side wall body 125 is filled with liquid medium. The liquid medium in the heat pipe 1211 of the side wall body 125 evaporates into gas and then flows into the heat pipe 1211 of the second end wall body 124. The gaseous medium in the heat pipe 1211 of the second end wall body 124 condenses into liquid and then flows back into the heat pipe 1211 of the side wall body 125. Of course, in other embodiments, more phase change medium can be filled in the heat pipe 1211, so that there is liquid medium in both the heat pipe 1211 of the side wall 125 and the heat pipe 1211 of the second end wall 124. At this time, the medium in the heat pipe 1211 of the side wall 125 and the medium in the heat pipe 1211 of the second end wall 124 evaporate and flow upward. After the gaseous medium in the heat pipe 1211 of the side wall 125 flows upward for a certain distance, it condenses into a liquid state and flows downward. After the gaseous medium in the heat pipe of the second end wall 124 flows upward for a certain distance, it condenses into a liquid state and flows downward. The filling amount of the phase change medium in the above heat pipe 1211 can be determined according to the actual application requirements. The heat exchange process and principle are all existing technologies and will not be repeated here.

[0091] In another embodiment, the heat exchange source 2 is located below the single battery 1, and the second end wall 124 is located above the first end wall 123. The heat exchange source 2 is attached to the side of the first end wall 123 away from the second end wall 124, and the heat exchange source 2 is a heat source. The medium in the heat pipe 1211 of the second end wall 124 and the heat pipe 1211 of the side wall 125 transfers heat to the battery body 11 and then condenses into liquid and flows downward to the bottom of the heat pipe 1211 of the side wall 125. In the heat pipe 1211 of the side wall 125, the liquid medium absorbs the heat from the heat source and evaporates into gas and flows upward. Part of the gaseous medium continues to release heat and condense in the heat pipe 1211 of the side wall 125, and the rest of the gaseous medium flows to the heat pipe 1211 of the second end wall 124 and releases heat and condenses.

[0092] Embodiment 3

[0093] This embodiment provides a single cell 1 and a battery module. The following mainly describes the differences between this embodiment and the previous embodiments, and the similarities are not repeated here.

[0094] like Figure 8 and Figure 9 As shown, in this embodiment, the number of temperature regulating walls 121 is three, and these three temperature regulating walls 121 form a temperature regulating wall group 122. The number of heat pipes 1211 is increased by increasing the number of temperature regulating walls 121, so as to further improve the cooling efficiency and / or heating efficiency of the battery cell body 11.

[0095] Furthermore, ifFigure 8 and Figure 9 As shown in Figure 9 , the wall body includes a first end wall body 123, a second end wall body 124, and a side wall body 125. The first end wall body 123 and the second end wall body 124 are opposite and parallel to each other. The first end wall body 123, the second end wall body 124, and the side wall body 125 enclose an accommodation cavity. The side wall body 125 is perpendicular to the first end wall body 123. A pole 13 is provided on the first end wall body 123. Two relatively arranged side wall bodies 125 and the second end wall body 124 are both temperature-adjusting walls 121, and these three temperature-adjusting walls 121 form a temperature-adjusting wall group 122. In this temperature-adjusting wall group 122, the heat pipes 1211 of every two adjacent temperature-adjusting walls 121 are in one-to-one correspondence and communication. In actual production, multiple mutually parallel heat pipes 1211 are sequentially joined and fixed to form a heat pipe 1211 array plate, and then the heat pipe 1211 array plate is bent twice to form a temperature-adjusting wall group 122. It can be seen that this structural design is beneficial to simplifying the production process of the temperature-adjusting wall group 122, and has the effects of improving production efficiency and reducing production costs. In addition, the medium in the same heat pipe 1211 flows from one temperature-adjusting wall 121 to another temperature-adjusting wall 121 (that is, the medium in the heat pipes 1211 of the same temperature-adjusting wall group 122 is shared), which improves the temperature uniformity of these two temperature-adjusting walls 121. It can be seen that this structural design can also improve the temperature uniformity of the temperature-adjusting walls 121 in the same temperature-adjusting wall group 122, making the temperature of the battery cell body 11 relatively uniform.

[0096] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single battery 1. The heat exchange source 2 is in direct contact or indirect contact with the temperature-adjusting wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0097] As Figure 8 and Figure 9 shown in Figure 9 , the heat exchange source 2 is plate-shaped. The plate-shaped heat exchange source 2 is attached to the second end wall body 124 and is perpendicular to the side wall body 125. The heat exchange source 2 in this embodiment is in direct contact with the temperature-adjusting wall 121 (the heat exchange source 2 is attached to the second end wall body 124). In other implementation schemes, the heat exchange source 2 can also be in indirect contact with the temperature-adjusting wall 121. For example, the heat exchange source 2 is attached to the first end wall body 123 or the side wall body 125 that is not a temperature-adjusting wall 121.

[0098] As Figure 8 and Figure 9As shown in the figure, in this embodiment, the heat exchange source 2 is located above the single cell 1, the second end wall 124 is located above the first end wall 123, the heat exchange source 2 is attached to the side of the second end wall 124 facing away from the first end wall 123, and the heat exchange source 2 is a cold source. After the medium in the heat pipes 1211 of the second end wall 124 and the heat pipes 1211 of the two side walls 125 absorbs the heat of the cell body 11, it evaporates into a gaseous state and flows upward into the heat pipes 1211 of the second end wall 124. In the heat pipes 1211 of the second end wall 124, the gaseous medium transfers heat to the cold source and condenses into a liquid state. Part of the liquid medium continues to absorb heat and evaporate in the heat pipes 1211 of the second end wall 124, and the remaining liquid medium respectively flows back into the heat pipes 1211 of the two side walls 125 to continue absorbing heat and evaporating.

[0099] It can be understood that when the heat dissipation rates on the opposite sides of the cell body 11 are different, the evaporation rates of the medium in the heat pipes 1211 of the two side walls 125 are different. Therefore, the confluence position of the gaseous medium in the two side heat pipes 1211 is not at the middle position of the heat pipes 1211 of the second end wall 124. Moreover, after the gaseous medium condenses into a liquid state in the heat pipes 1211 of the second end wall 124, it does not necessarily flow back into the heat pipes 1211 of the two side walls 125 equally.

[0100] In another embodiment, the heat exchange source 2 is located below the single cell 1, the second end wall 124 is located above the first end wall 123, the heat exchange source 2 is attached to the side of the first end wall 123 facing away from the second end wall 124, and the heat exchange source 2 is a heat source. After the medium in the heat pipes 1211 of the second end wall 124 and the heat pipes 1211 of the two side walls 125 transfers heat to the cell body 11, it condenses into a liquid state and flows downward to the bottom of the heat pipes 1211 of the side walls 125. In the heat pipes 1211 of the side walls 125, the liquid medium absorbs the heat of the heat source and evaporates into a gaseous state and flows upward. Part of the gaseous medium continues to release heat and condenses in the heat pipes 1211 of the side walls 125, and the remaining gaseous medium flows into the heat pipes 1211 of the second end wall 124 to release heat and condense.

[0101] Embodiment 4

[0102] This embodiment provides a single cell 1 and a battery module. The following mainly describes the differences between this embodiment and the previous embodiments, and the same parts will not be elaborated.

[0103] As Figure 10 and Figure 11As shown in the figure, the temperature-regulating wall group 122 includes a first temperature-regulating wall 1221 and N second temperature-regulating walls 1222. The first temperature-regulating wall 1221 is formed by splicing N first temperature-regulating sub-walls 12211. The N second temperature-regulating walls 1222 are arranged adjacent to the N first temperature-regulating sub-walls 12211 in a one-to-one correspondence. At least one heat pipe 1211 in at least one of the second temperature-regulating walls 1222 is communicated with at least one heat pipe 1211 in the corresponding first temperature-regulating sub-wall 12211. N≥2 and N is an integer. In this embodiment, N = 2. Of course, in other embodiments, N can also be 3, 4, 5, etc.

[0104] Furthermore, as Figure 10 and Figure 11 shown, in this embodiment, the two second temperature-regulating walls 1222 are two opposite side wall bodies 125, the first temperature-regulating wall 1221 is the second end wall body 124, the wall body parallel to the first temperature-regulating wall 1221 is the first end wall body 123, and the pole column 13 is arranged on the first end wall body 123. In other embodiments, the two second temperature-regulating walls 1222 can also be two adjacent side wall bodies 125 or the two second temperature-regulating walls 1222 can also be two side wall bodies 125 that are spaced apart and not opposite.

[0105] Optionally, the number of heat pipes 1211 in the second temperature-regulating wall 1222 and the corresponding first temperature-regulating sub-wall 12211 is equal and they are communicated in a one-to-one correspondence. In actual production, a plurality of mutually parallel heat pipes 1211 are sequentially spliced and fixed to form a heat pipe 1211 array plate, and then the heat pipe 1211 array plate is bent once to form a second temperature-regulating wall 1222 and a first temperature-regulating sub-wall 12211 corresponding to and communicated with the second temperature-regulating wall 1222. Then, the two first temperature-regulating sub-walls 12211 are spliced to form a first temperature-regulating wall 1221. It can be seen that this structural design is beneficial to simplifying the production process of the battery cell case 12 and has the effects of improving production efficiency and reducing production costs. In addition, the medium in the same heat pipe 1211 flows from one temperature-regulating wall 121 to another temperature-regulating wall 121 (that is, the medium in the heat pipes 1211 of the same temperature-regulating wall group 122 is shared), which improves the temperature uniformity of these two temperature-regulating walls 121. It can be seen that this structural design can also improve the temperature uniformity of the temperature-regulating walls 121 in the same temperature-regulating wall group 122, making the temperature of the battery cell body 11 relatively uniform.

[0106] Optionally, as Figure 10 and Figure 11As shown, the extending direction of the heat pipe 1211 of the second temperature regulating wall 1222 is perpendicular to that of the corresponding first temperature regulating sub-wall 12211. In actual production, bending the above-mentioned heat pipe 1211 array plate by 90° can form a second temperature regulating wall 1222 and a first temperature regulating sub-wall 12211 corresponding and communicating with the second temperature regulating wall 1222. This structural design is beneficial to improving the consistency of the bending angles in different bending batches.

[0107] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single battery 1. The heat exchange source 2 is in direct or indirect contact with the temperature regulating wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0108] As Figure 10 and Figure 11 shown, the heat exchange source 2 is plate-shaped. The plate-shaped heat exchange source 2 is attached to the second end wall body 124 and is perpendicular to the side wall body 125. In this embodiment, the heat exchange source 2 is in direct contact with the temperature regulating wall 121 (the heat exchange source 2 is attached to the second end wall body 124). In other embodiments, the heat exchange source 2 can also be in indirect contact with the temperature regulating wall 121. For example, the heat exchange source 2 is attached to the first end wall body 123 or the side wall body 125 that is not the temperature regulating wall 121.

[0109] As Figure 10 and Figure 11 shown, the heat exchange source 2 is located above the single battery 1, the second end wall body 124 is located above the first end wall body 123, the heat exchange source 2 is attached to the side of the second end wall body 124 facing away from the first end wall body 123, and the heat exchange source 2 is a cold source. The medium in the heat pipes 1211 of the second temperature regulating wall 1222 and the heat pipes 1211 of the first temperature regulating sub-walls 12211 absorbs the heat of the battery cell body 11 and evaporates into a gaseous state and flows upward. In the heat pipes 1211 of the first temperature regulating sub-walls 12211, the gaseous medium transfers the heat to the cold source and condenses into a liquid state. Part of the liquid medium continues to absorb heat and evaporate in the heat pipes of the first temperature regulating sub-walls 12211, and the remaining liquid medium flows back to the heat pipes 1211 of the second temperature regulating wall 1222 to continue absorbing heat and evaporating.

[0110] When the heat dissipation rates on the opposite sides of the battery cell body 11 are different, the evaporation rates of the medium in the heat pipes 1211 of the two second temperature regulating walls 1222 are different, and the return flow amounts of the liquid medium in the heat pipes 1211 of the two first temperature regulating sub-walls 12211 are also different. In this embodiment, a first temperature regulating wall 1221 is formed by splicing two first temperature regulating sub-walls 12211, so that the media in the heat pipes 1211 of the two first temperature regulating sub-walls 12211 are separated from each other, thereby avoiding the problems of different filling amounts of the medium in the heat pipes 1211 of the two second temperature regulating walls 1222 and different filling amounts of the medium in the heat pipes 1211 of the two first temperature regulating sub-walls 12211.

[0111] In another embodiment, the heat exchange source 2 is located below the single cell 1, the second end wall body 124 is located above the first end wall body 123, the heat exchange source 2 is attached to the side of the first end wall body 123 facing away from the second end wall body 124, and the heat exchange source 2 is a heat source. The medium in the heat pipes 1211 of the first temperature-regulating partition wall 12211 and the heat pipes 1211 of the second temperature-regulating wall 1222 transfers heat to the cell body 11 and then condenses into a liquid and flows downward to the bottom of the heat pipes 1211 of the second temperature-regulating wall 1222. In the heat pipes 1211 of the second temperature-regulating wall 1222, the liquid medium absorbs the heat of the heat source and evaporates into a gas and flows upward. Part of the gaseous medium continues to release heat and condenses in the heat pipes 1211 of the second temperature-regulating wall 1222, and the remaining gaseous medium flows into the heat pipes of the first temperature-regulating partition wall 12211 to release heat and condense.

[0112] Embodiment Five

[0113] This embodiment provides a single cell 1 and a battery module. The differences between this embodiment and the previous embodiments are mainly described below, and the same parts will not be repeated.

[0114] As Figures 12 to 15 shown, the number of temperature-regulating walls 121 is two or more. The two or more temperature-regulating walls 121 include independent temperature-regulating walls, and the heat pipes 1211 of the independent temperature-regulating walls are not connected to the heat pipes 1211 of all the other temperature-regulating walls 121. In this embodiment, the number of both the temperature-regulating walls 121 and the independent temperature-regulating walls is four. In actual production, multiple mutually parallel heat pipes 1211 are sequentially joined and fixed to form a heat pipe 1211 array plate. Four heat pipe 1211 array plates are made in this way, and then these four heat pipe 1211 array plates are sequentially fixedly connected end to end to form four side wall bodies 125 of the cell case 12. This structural design simplifies the production process of the cell case 12 and has the effects of reducing the production difficulty and the production cost.

[0115] Of course, in other embodiments, the number of the temperature-regulating walls 121 and the independent temperature-regulating walls can also be two, five, six, etc. respectively. Moreover, the number of the temperature-regulating walls 121 and the independent temperature-regulating walls can be the same or different, as long as the number of the independent temperature-regulating walls is less than or equal to the number of the temperature-regulating walls 121.

[0116] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single cell 1. The heat exchange source 2 is in direct or indirect contact with the temperature-regulating wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0117] As Figures 12 to 15As shown, the heat exchange source 2 is plate-shaped. The plate-shaped heat exchange source 2 is in contact with the second end wall body 124 and is perpendicular to the side wall body 125. In this embodiment, the heat exchange source 2 is in indirect contact with the temperature control wall 121 (the heat exchange source 2 is in contact with the second end wall body 124 and not in contact with the temperature control wall 121). In other embodiments, the heat exchange source 2 can also be in direct contact with the temperature control wall 121, that is, the heat exchange source 2 is in contact with the temperature control wall 121.

[0118] As Figures 12 to 15 shown, the heat exchange source 2 is located above the single cell 1, and the second end wall body 124 is located above the first end wall body 123. The heat exchange source 2 is in contact with the side of the second end wall body 124 facing away from the first end wall body 123, and the heat exchange source 2 is a cold source. The medium in the heat pipe 1211 evaporates into a gas after absorbing the heat of the cell body 11 and flows upward. The heat of the gaseous medium is emitted to the cold source through the second end wall body 124 and then condenses into a liquid. The liquid medium flows downward in the heat pipe 1211. This structural design can improve the heat exchange efficiency between the heat exchange source 2 and the gaseous medium in the heat pipe 1211, and thus improve the cooling effect of the temperature control wall 121 on the cell body 11. In addition, the cold source in contact with the second end wall body 124 directly absorbs the heat of the second end wall body 124, further improving the cooling efficiency of the cell body 11 and also improving the temperature uniformity of the cell case 12.

[0119] In another embodiment, the heat exchange source 2 is located below the single cell 1, the second end wall body 124 is located above the first end wall body 123, the heat exchange source 2 is in contact with the side of the first end wall body 123 facing away from the second end wall body 124, and the heat exchange source 2 is a heat source. The medium in the heat pipe 1211 condenses into a liquid after transferring heat to the cell body 11. The liquid medium flows downward in the heat pipe 1211. The liquid medium absorbs the heat of the heat source, evaporates into a gaseous medium and flows upward to continue transferring heat to the cell body 11.

[0120] Embodiment Six

[0121] This embodiment provides a single cell 1 and a battery module. The following mainly describes the differences between this embodiment and the previous embodiments, and the same parts will not be elaborated.

[0122] As Figures 16 to 18As shown in the figure, the temperature control wall group 122 includes two first temperature control walls 1221 and N second temperature control walls 1222. The N second temperature control walls 1222 are located between the two first temperature control walls 1221. The first temperature control wall 1221 is formed by splicing N first temperature control sub-walls 12211. The N second temperature control walls 1222 are arranged adjacent to the N first temperature control sub-walls 12211 in one-to-one correspondence. At least one heat pipe 1211 in at least one of the second temperature control walls 1222 is communicated with at least one heat pipe 1211 in the corresponding first temperature control sub-wall 12211. N≥2 and N is an integer. In this embodiment, N = 2. Of course, in other implementation schemes, N can also be 3, 4 or 5, etc.

[0123] Further, as Figures 16 to 18 shown in the figure, in this embodiment, the two first temperature control walls 1221 and the two second temperature control walls 1222 are both side wall bodies 125, and the first end wall body 123 and the second end wall body 124 are both heat conduction walls 126. The first end wall body 123 and the second end wall body 124 are both provided with pole columns 13, and the first end wall body 123 is further provided with an explosion-proof valve 14.

[0124] Optionally, the number of heat pipes 1211 in the second temperature control wall 1222 and the corresponding first temperature control sub-wall 12211 is equal and they are communicated in one-to-one correspondence. In actual production, a plurality of mutually parallel heat pipes 1211 are spliced and fixed in sequence to form a heat pipe 1211 array plate, and then bent twice along the extending direction of the heat pipes 1211 in the heat pipe 1211 array plate, so as to form a second temperature control wall 1222 and two first temperature control sub-walls 12211 corresponding to and communicated with the second temperature control wall 1222. Then, the two second temperature control walls 1222 are arranged oppositely, and the first temperature control sub-walls 12211 on the same side are spliced to form a first temperature control wall 1221. It can be seen that this structural design is beneficial to simplifying the production process of the battery cell case 12, and has the effects of improving production efficiency and reducing production costs. In addition, the medium in the same heat pipe 1211 flows from one temperature control wall 121 to another temperature control wall 121 (that is, the media in the heat pipes 1211 in the same temperature control wall group 122 are shared), which improves the temperature uniformity of these two temperature control walls 121. It can be seen that this structural design can also improve the temperature uniformity of the temperature control walls 121 in the same temperature control wall group 122, making the temperature of the battery cell body 11 relatively uniform.

[0125] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single battery 1. The heat exchange source 2 is in direct contact or indirect contact with the temperature control wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0126] As Figures 16 to 18As shown, the heat exchange source 2 is plate-shaped and is located above the single cell 1. The two first temperature control walls 1221 are distributed vertically. The plate-shaped heat exchange source 2 is in contact with the upper first temperature control wall 1221, and the plate-shaped heat exchange source 2 is perpendicular to the second temperature control wall 1222. The heat exchange source 2 is a cold source. The medium in the heat pipes 1211 of the first temperature control wall 1221 and the second temperature control wall 1222 absorbs the heat of the battery cell body 11 and then evaporates into a gas and flows upward into the heat pipes 1211 of the upper first temperature control wall 1221. In the heat pipes 1211 of the upper first temperature control wall 1221, the gaseous medium transfers the heat to the cold source and condenses into a liquid. Part of the liquid medium absorbs heat again and evaporates in the heat pipes 1211 of the upper first temperature control wall 1221, and the remaining liquid medium flows back into the heat pipes 1211 of the second temperature control wall 1222 and the lower first temperature control wall 1221 to absorb heat and evaporate again.

[0127] In another embodiment, the plate-shaped heat exchange source 2 is located below the single cell 1. The two first temperature control walls 1221 are distributed vertically. The plate-shaped heat exchange source 2 is in contact with the lower first temperature control wall 1221, and the plate-shaped heat exchange source 2 is perpendicular to the second temperature control wall 1222. The heat exchange source 2 is a heat source. The medium in the heat pipes 1211 of the first temperature control wall 1221 and the second temperature control wall 1222 transfers heat to the battery cell body 11 and then condenses into a liquid medium and flows downward into the heat pipes 1211 of the lower first temperature control wall 1221. In the heat pipes 1211 of this first temperature control wall 1221, the liquid medium absorbs the heat of the heat source and evaporates into a gas. Part of the gaseous medium transfers heat to the battery cell body 11 again in the heat pipes 1211 of the lower first temperature control wall 1221, and the remaining gaseous medium flows upward into the heat pipes 1211 of the second temperature control wall 1222 and the upper first temperature control wall 1221 to transfer heat to the battery cell body 11 again.

[0128] Example Seven

[0129] This embodiment provides a single cell 1 and a battery module. The following mainly describes the differences between this embodiment and the previous embodiments, and the same parts will not be repeated.

[0130] As Figures 19 to 21As shown in the figure, the number of temperature-regulating walls 121 is four. The four temperature-regulating walls 121 are connected end to end in sequence to form four side wall bodies 125 of the battery cell housing 12, and these four temperature-regulating walls 121 form a temperature-regulating wall group 122. In this temperature-regulating wall group 122, the heat pipes 1211 of each temperature-regulating wall 121 communicate with the heat pipes 1211 of the adjacent temperature-regulating wall 121 in a one-to-one correspondence. In actual production, multiple mutually parallel heat pipes 1211 are sequentially joined and fixed to form a heat pipe 1211 array plate, and then the heat pipe 1211 array plate is bent three times along the extending direction of the heat pipes 1211 in the heat pipe 1211 array plate. Finally, the bent heat pipe 1211 array plate is fixed at its head and tail along the bending direction, and a temperature-regulating wall group 122 can be formed. It can be seen that this structural design is beneficial to simplifying the production process of the battery cell housing 12 and has the effects of improving production efficiency and reducing production costs. In addition, the medium in the same heat pipe 1211 flows from one temperature-regulating wall 121 to another temperature-regulating wall 121 (that is, the medium in the heat pipes 1211 of the same temperature-regulating wall group 122 is shared), which improves the temperature uniformity of these two temperature-regulating walls 121. It can be seen that this structural design can also improve the temperature uniformity of the temperature-regulating walls 121 in the same temperature-regulating wall group 122, making the temperature of the battery cell body 11 relatively uniform.

[0131] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single battery 1. The heat exchange source 2 is in direct contact or indirect contact with the temperature-regulating wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0132] As Figures 19 to 21 shown in the figure, the heat exchange source 2 is a plate-shaped cold source. The heat exchange source 2 is located above the single battery 1, and the heat exchange source 2 is attached to the temperature-regulating wall 121 at the top. The medium in the heat pipes 1211 of the four temperature-regulating walls 121 absorbs the heat of the battery cell body 11 and evaporates into a gaseous state and flows upward. In the heat pipes 1211 of the top temperature-regulating wall 121, the gaseous medium transfers the heat to the cold source and condenses into a liquid state. Part of the liquid medium continues to absorb heat and evaporate in the heat pipes 1211 of the top temperature-regulating wall 121, and the remaining liquid medium flows back to the heat pipes 1211 of the other three temperature-regulating walls 121 to continue to absorb heat and evaporate.

[0133] In another embodiment, the heat exchange source 2 is a plate-shaped heat source. The heat exchange source 2 is located below the single battery 1, and the heat exchange source 2 is attached to the temperature-regulating wall 121 at the bottom. The medium in the heat pipes 1211 of the four temperature-regulating walls 121 transfers heat to the battery cell body 11 and condenses into a liquid medium and flows downward to the heat pipes 1211 of the bottom temperature-regulating wall 121. In the heat pipes 1211 of the bottom temperature-regulating wall 121, the liquid medium absorbs the heat of the heat source and evaporates into a gaseous state. Part of the gaseous medium transfers heat to the battery cell body 11 again in the heat pipes 1211 of the bottom temperature-regulating wall 121, and the remaining gaseous medium flows upward to the heat pipes 1211 of the other three temperature-regulating walls 121 to transfer heat to the battery cell body 11 again.

[0134] Example VIII

[0135] This embodiment provides a single cell 1 and a battery module. The differences between this embodiment and the previous embodiments will be mainly described below, and the same parts will not be repeated.

[0136] As shown in Figure 22 and Figure 23 The single cell 1 is cylindrical. The wall body includes a first end wall body 123, a second end wall body, and a cylindrical side wall body 125. The first end wall body 123 and the second end wall body are respectively located at opposite ends of the side wall body 125. The pole column 13 is arranged on the first end wall body 123. The battery cell body 11 is formed by stacking and winding a positive electrode sheet 111, a separator 113, and a negative electrode sheet 112 in sequence.

[0137] Furthermore, as shown in Figure 22 and Figure 23 The cylindrical side wall body 125 is a temperature regulating wall 121, and both the first end wall body 123 and the second end wall body are heat conducting walls 126.

[0138] The battery module provided in this embodiment includes a heat exchange source 2 and the above single cell 1. The heat exchange source 2 is in direct or indirect contact with the temperature regulating wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0139] Optionally, as shown in Figure 22 and Figure 23 The heat exchange source 2 is attached to the side wall body 125. The heat exchange source 2 is a profiling part, and the outer shape of the heat exchange source 2 is adapted to the shape of the cylindrical side wall body 125. When the heat exchange source 2 is a cold source, the medium in the heat pipe 1211 of the side wall body 125 absorbs the heat of the battery cell body 11 and then evaporates into a gas, transfers the heat to the cold source and condenses into a liquid, and then the liquid medium in the side wall body 125 continues to absorb the heat of the battery cell body 11 to achieve efficient cooling of the battery cell body 11. When the heat exchange source 2 is a heat source, the medium in the heat pipe 1211 of the side wall body 125 absorbs the heat emitted by the heat source and then evaporates into a gas, transfers the heat to the battery cell body 11 and condenses into a liquid, and then the liquid medium in the side wall body 125 continues to absorb the heat emitted by the heat source to achieve efficient heating of the battery cell body 11.

[0140] Of course, in other embodiments, the heat exchange source 2 can also be attached to the first end wall body 123 and / or the second end wall body.

[0141] Example IX

[0142] This embodiment provides a single cell 1 and a battery module. The differences between this embodiment and the previous embodiments will be mainly described below, and the same parts will not be repeated.

[0143] As shown in Figure 24As shown, the single cell 1 is cylindrical, and its wall body includes a first end wall body 123, a second end wall body, and a cylindrical side wall body 125. The first end wall body 123 and the second end wall body are respectively located at opposite ends of the side wall body 125. The cylindrical side wall body 125 and the first end wall body 123 are both temperature-regulating walls 121, and the second end wall body is a heat-conducting wall 126.

[0144] The battery module provided in this embodiment includes a heat exchange source 2 and the above-mentioned single cell 1. The heat exchange source 2 is in direct or indirect contact with the temperature-regulating wall 121, and the heat exchange source 2 is a cold source and / or a heat source.

[0145] Optionally, as Figure 24 shown, the heat exchange source 2 is attached to the side wall body 125. The heat exchange source 2 is a profiling part, and the outer shape of the heat exchange source 2 is adapted to the shape of the cylindrical side wall body 125. When the heat exchange source 2 is a cold source, the medium in the heat pipes 1211 of the side wall body 125 and the first end wall body 123 absorbs the heat of the battery cell body 11 and then evaporates into a gas, transfers the heat to the cold source and condenses into a liquid. Then the liquid medium in the side wall body 125 and the first end wall body 123 continues to absorb the heat of the battery cell body 11 to achieve efficient cooling of the battery cell body 11. When the heat exchange source 2 is a heat source, the medium in the heat pipes 1211 of the side wall body 125 and the first end wall body 123 absorbs the heat emitted by the heat source and then evaporates into a gas, transfers the heat to the battery cell body 11 and condenses into a liquid. Then the liquid medium in the side wall body 125 and the first end wall body 123 continues to absorb the heat emitted by the heat source to achieve efficient heating of the battery cell body 11.

[0146] It should be noted that the side wall body 125 and the first end wall body 123 can both be independent temperature-regulating walls, or the side wall body 125 and the first end wall body 123 can form a temperature-regulating wall group 122. When the side wall body 125 and the first end wall body 123 are both independent temperature-regulating walls, the heat pipes 1211 of the side wall body 125 and the heat pipes 1211 of the first end wall body 123 are not connected to each other. When the side wall body 125 and the first end wall body 123 form a temperature-regulating wall group 122, the heat pipes 1211 of the side wall body 125 and the heat pipes 1211 of the first end wall body 123 are connected to each other.

[0147] Of course, in other embodiments, the heat exchange source 2 can also be attached to the first end wall body 123 and / or the second end wall body.

[0148] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A single cell, characterized in that, Comprising: The battery cell body (11); The battery cell case (12), the battery cell case (12) includes a plurality of wall bodies, and the plurality of wall bodies enclose to form a receiving cavity, the battery cell body (11) is disposed in the receiving cavity, and at least one of the plurality of wall bodies is a temperature regulating wall (121), and the temperature regulating wall (121) includes at least one heat pipe (1211).

2. The single cell according to claim 1, wherein The number of the temperature regulating walls (121) is two or more, and two or more of the temperature regulating walls (121) form at least one temperature regulating wall group (122), and the heat pipe (1211) of any one of the temperature regulating walls (121) in the same temperature regulating wall group (122) is communicated with the heat pipe (1211) of at least one of the remaining temperature regulating walls (121).

3. The single cell according to claim 2, characterized in that, In the same temperature regulating wall group (122), at least one heat pipe (1211) of one of the adjacent two temperature regulating walls (121) is communicated with at least one heat pipe (1211) of the other.

4. The single cell according to claim 2, wherein The temperature regulating wall group (122) includes a first temperature regulating wall (1221) and N second temperature regulating walls (1222), the first temperature regulating wall (1221) is formed by splicing N first temperature regulating sub-walls (12211), and the N second temperature regulating walls (1222) are arranged adjacent to the N first temperature regulating sub-walls (12211) one by one, and at least one heat pipe (1211) in the second temperature regulating wall (1222) is communicated with at least one heat pipe (1211) in the corresponding first temperature regulating sub-wall (12211), N≥2, and N is an integer; The number of the first temperature regulating walls (1221) is one; Or, the number of the first temperature regulating walls (1221) is two, and the N second temperature regulating walls (1222) are located between the two first temperature regulating walls (1221).

5. The single cell according to claim 3, wherein In the same temperature regulating wall group (122), the number of the heat pipes (1211) of the adjacent two temperature regulating walls (121) is equal and they are communicated with each other one by one; And / or, in the same temperature regulating wall group (122), the extending directions of the heat pipes (1211) of the adjacent two temperature regulating walls (121) are perpendicular to each other.

6. The single cell according to claim 4, characterized in that, The number of the heat pipes (1211) of the second temperature regulating wall (1222) and the corresponding first temperature regulating sub-wall (12211) is equal and they are communicated with each other one by one; And / or, the extending directions of the heat pipes (1211) of the second temperature regulating wall (1222) and the corresponding first temperature regulating sub-wall (12211) are perpendicular to each other.

7. The single cell according to claim 1, characterized in that, The number of the temperature regulating walls (121) is two or more, and two or more of the temperature regulating walls (121) include independent temperature regulating walls, and the heat pipes (1211) of the independent temperature regulating walls are not communicated with the heat pipes (1211) of all the remaining temperature regulating walls (121); And / or, the wall body other than the temperature regulating wall (121) is a heat conducting wall (126).

8. The single cell according to claim 1, characterized in that, The wall body includes a first end wall body (123), a second end wall body (124) and a side wall body (125). The first end wall body (123) and the second end wall body (124) are oppositely arranged. The first end wall body (123), the second end wall body (124) and the side wall body (125) enclose to form the accommodation cavity. A terminal post (13) is provided on the first end wall body (123). The second end wall body (124) is the temperature regulating wall (121). The extending direction of the heat pipe (1211) of the second end wall body (124) is parallel to the surface of the second end wall body (124).

9. The single cell according to claim 8, wherein The first end wall body (123) and the second end wall body (124) are parallel to each other. The side wall body (125) is perpendicular to the first end wall body (123). The side wall body (125) includes at least one temperature regulating wall (121), and the extending direction of the heat pipe (1211) of this temperature regulating wall (121) is perpendicular to the first end wall body (123).

10. Battery module, characterized in that, It includes a heat exchange source (2) and the single cell (1) according to any one of claims 1-9. The heat exchange source (2) is in direct contact or indirect contact with the temperature regulating wall (121). The heat exchange source (2) is a cold source and / or a heat source.

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