Soaking battery module

Abstract

The utility model relates to a soaking battery module which comprises at least one battery assembly, end plates arranged at the two ends of the soaking battery module and a soaking piece, and the battery assembly comprises a plurality of battery cells stacked in sequence; at least one outer surface of the battery cell is subjected to heat dissipation through a soaking part, an evaporation cavity is formed in the soaking part, cooling liquid and a heat conduction part for uniformly conducting heat are arranged in the evaporation cavity, a liquid cooling plate is arranged on one side of the soaking battery module in the length direction of the soaking battery module, and the liquid cooling plate is connected with the soaking part through a heat conduction connecting part. According to the soaking battery module, the soaking pieces are arranged between the two adjacent battery cells and between the battery cells located at the two ends of the battery module and the end plates, heat generated by the battery module can be absorbed more quickly, and under the cooperation of the heat conduction pieces and the heat conduction connecting pieces, the liquid cooling plates can quickly absorb the heat generated by the battery module, so that the heat conduction efficiency of the battery module is improved. And the heat dissipation efficiency of the battery module is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery modules, and in particular to a heat-equalizing battery module. Background Art

[0002] With the development of new energy technologies, lithium batteries are gradually developing towards larger size and larger capacity, and the heat generated during the charging and discharging process is also greater. The heat dissipation problem of battery modules or battery packs composed of multiple lithium batteries faces great challenges.

[0003] In the related art, air cooling or liquid cooling is generally used to dissipate heat from the battery module. However, the existing heat dissipation structure has poor heat dissipation effect for battery modules with large capacity or charging and discharging current exceeding a certain value, especially for the battery pole part with large heat generation. Since the battery pole part is arranged in the battery cell and far away from the liquid cooling plate, the heat dissipation effect is poor, resulting in low heat dissipation efficiency of the battery module. Utility Model Content

[0004] Based on this, it is necessary to provide a heat-equalizing battery module to address the problem of low heat dissipation efficiency of battery modules in related technologies.

[0005] A heat-spreading battery module comprises at least one battery assembly and end plates arranged at both ends of the heat-spreading battery module, wherein the battery assembly comprises a plurality of battery cells stacked in sequence;

[0006] A heat spreader, at least one outer surface of the battery cell dissipates heat through the heat spreader, an evaporation chamber is provided in the heat spreader, the evaporation chamber is provided with a coolant and a heat conductive member for uniform heat conduction, a liquid cooling plate is provided on one side of the heat spreader battery module along its own length direction, and the liquid cooling plate is connected to the heat spreader through a heat conductive connector.

[0007] In one embodiment, the heat spreader includes a heat spreader plate, the evaporation chamber is disposed in the heat spreader plate, and the heat conductive member includes a plurality of capillary wicks disposed on the cavity wall of the evaporation chamber.

[0008] In one of the embodiments, the heat spreader includes a top cover and a bottom plate that are interlocked with each other, an evaporation chamber is formed between the top cover and the bottom plate, and a heat dissipation support body for supporting the top cover and the bottom plate is also provided in the evaporation chamber.

[0009] In one of the embodiments, the heat spreader includes at least one vertical portion and a horizontal portion, at least one vertical surface of the vertical portion is pressed against a main surface of a battery cell, and the horizontal portion is connected to the liquid cooling plate via a heat conductive connector.

[0010] In one embodiment, an insulating protective layer is coated on the outer surface of the vapor chamber.

[0011] In one embodiment, the heat-spreading battery module includes at least two battery assemblies, and a pressure-resistant member is provided between two adjacent battery assemblies;

[0012] And / or, a pressure-resistant part is provided between the battery cells and the end plates at both ends of the heat-spreading battery module.

[0013] In one embodiment, the vapor chamber includes an L-shaped vapor chamber and a U-shaped vapor chamber, the L-shaped vapor chamber is arranged on two outer sides of the battery assembly, and the battery cells inside the battery assembly are arranged in the U-shaped groove of the U-shaped vapor chamber;

[0014] Alternatively, the vapor chamber comprises an L-shaped vapor chamber, and a vertical surface of a vertical portion of the L-shaped vapor chamber is pressed against a main surface of a battery cell;

[0015] Alternatively, the vapor chamber includes a U-shaped vapor chamber, and two vertical surfaces of each vertical portion of the U-shaped vapor chamber are respectively pressed against main surfaces of two adjacent battery cells.

[0016] In one embodiment, the thermally conductive connector includes a thermally conductive adhesive layer.

[0017] In one embodiment, the pressure-resistant member comprises a flexible antistatic pressure-resistant layer.

[0018] In one embodiment, the pressure-resistant member is connected to the battery core via a heat transfer connector.

[0019] The above-mentioned heat-equalizing battery module includes at least one battery assembly, end plates and heat-equalizing parts arranged at both ends of the heat-equalizing battery module, and the battery assembly includes a plurality of battery cells stacked in sequence; at least one outer surface of the battery cell is cooled by the heat-equalizing part, and an evaporation chamber is provided in the heat-equalizing part, and a coolant and a heat-conducting part for uniform heat conduction are provided in the evaporation chamber. A liquid cooling plate is provided on one side of the heat-equalizing battery module along its own length direction, and the liquid cooling plate is connected to the heat-equalizing part through a heat-conducting connector. The present application can absorb the heat generated by the battery module more quickly by arranging heat-equalizing parts between two adjacent battery cells and between the battery cells and the end plates at both ends of the battery module, and after the heat-equalizing parts absorb the heat of the battery cells, the coolant in each evaporation chamber will evaporate into water vapor, and under the action of the heat-conducting part, the water vapor is gradually evenly distributed in the evaporation chamber, so that the temperature in the evaporation chamber is evenly distributed, and the heat-equalizing part is connected to the liquid cooling plate through a heat-conducting connector, and condensation will occur in the evaporation chamber, so that the liquid cooling plate quickly absorbs the heat generated by the battery module, thereby improving the heat dissipation efficiency of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 Schematic diagram of the structure of the heat-equalizing battery module in some embodiments of the present application.

[0022] Figure 2 This is a schematic diagram of an exploded structure used to illustrate the connection relationship between the battery cell, the heat spreader, the end plate, the pressure-resistant part and the liquid cooling plate in some embodiments of the present application.

[0023] Figure 3 This is a schematic diagram of an exploded structure used to illustrate the connection relationship between the battery cell, the heat spreader, the end plate, the pressure-resistant part and the liquid cooling plate in another embodiment of the present application.

[0024] Figure 4 This is a schematic diagram of an exploded structure used to illustrate the connection relationship between the battery cell, the heat spreader, the end plate and the pressure-resistant member in another embodiment of the present application.

[0025] Figure 5 This is a schematic diagram of the L-shaped heat sink structure in another embodiment of the present application.

[0026] Figure 6 This is a schematic diagram of the U-shaped heat sink structure in another embodiment of the present application.

[0027] Figure 7 This is a schematic cross-sectional structure diagram for illustrating the connection relationship between the top cover, the bottom plate and the heat dissipation support body in some embodiments of the present application.

[0028] Description of Figure Numbers:

[0029] 100, battery assembly; 110, end plate; 120, battery cell; 121, explosion-proof valve; 122, battery pole; 200, heat spreader; 210, top cover; 220, bottom plate; 230, evaporation chamber; 240, capillary wick; 250, heat dissipation support; 260, vertical portion; 270, horizontal portion; 280, L-shaped heat spreader; 290, U-shaped heat spreader; 300, thermal conductive connector; 400, liquid cooling plate; 500, pressure-resistant part. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] With the development of new energy technologies, lithium batteries are gradually developing towards larger volumes and larger capacities, and the heat generated during the charging and discharging process is also greater. The heat dissipation problem of battery modules or battery packs composed of multiple lithium batteries faces great challenges. In related technologies, air cooling or liquid cooling is generally used to dissipate heat from battery modules. However, the existing heat dissipation structure has poor heat dissipation effect for battery modules with large capacity or charging and discharging current exceeding a certain value, especially for the battery pole part with large heat generation. Since the battery pole part is arranged in the battery cell and far away from the liquid cooling plate, the heat dissipation effect is poor, resulting in low heat dissipation efficiency of the battery module.

[0037] In order to solve the problem of low heat dissipation efficiency of battery modules in the related art, the inventor of the present application designed a heat-equalizing battery module.

[0038] Reference Figures 1 to 7 A heat-equalizing battery module provided in an embodiment of the present application comprises at least one battery assembly 100 and end plates 110 arranged at both ends of the heat-equalizing battery module, wherein the battery assembly 100 comprises a plurality of battery cells 120 stacked in sequence, an explosion-proof valve 121 and a battery pole 122 are provided in the battery cell 120, at least one outer surface of the battery cell 120 dissipates heat through a heat-equalizing member, an evaporation chamber 230 is provided in the heat-equalizing member, a coolant and a heat-conducting member for uniform heat conduction are provided in the evaporation chamber 230, a liquid cooling plate 400 is provided on one side of the heat-equalizing battery module along its own length direction, the liquid cooling plate 400 is connected to the heat-equalizing member through a heat-conducting connector 300, and the stacking direction of the battery cells 120 in this embodiment can be consistent with the length direction of the liquid cooling plate 400.

[0039] In this embodiment, by providing a heat spreader between two adjacent battery cells 120 and between the battery cells 120 and the end plates 110 at both ends of the battery module, the heat generated by the battery module can be absorbed more quickly. After the heat spreader absorbs the heat of the battery cells 120, the coolant in each evaporation chamber 230 will evaporate into water vapor, and under the action of the heat conductive member, the water vapor will gradually be evenly distributed in the evaporation chamber 230, so that the temperature in the evaporation chamber 230 is evenly distributed. The heat spreader is connected to the liquid cooling plate 400 through the heat conductive connector 300, and condensation will occur in the evaporation chamber 230, so that the liquid cooling plate 400 will quickly absorb the heat generated by the battery module, thereby improving the heat dissipation efficiency of the battery module.

[0040] Reference Figures 1 to 7 In some embodiments, the heat spreader includes a heat spreader 200, an evaporation chamber 230 is disposed in the heat spreader 200, and the heat conductive member includes a plurality of capillary cores 240 arranged on the cavity wall of the evaporation chamber 230, wherein the capillary cores 240 can be evenly arranged on the cavity wall of the evaporation chamber 230.

[0041] In this embodiment, the capillary core 240 can increase the surface area of ​​water vapor evaporation. When the water vapor formed by evaporation is adsorbed on the capillary core 240, since the capillary core 240 has a larger surface area and better adsorption performance, the capillary core 240 can better absorb the heat in the evaporation chamber 230 and evaporate, thereby realizing the transfer and dispersion of heat and improving the heat equalization effect of the heat spreader 200.

[0042] Furthermore, the capillary wick 240 in the present embodiment may be a velvet structure. Since the capillary wick 240 with the velvet structure helps to further increase its contact area with water vapor, when the heat generated by the battery cell 120 is adsorbed through the water vapor on the surface of the capillary wick 240, the capillary wick 240 can absorb more heat, thereby improving the heat dissipation performance; in addition, the capillary wick 240 with the velvet structure helps to further improve the uniformity of heat distribution, so even if a local high temperature area is generated in the battery pole part of the battery cell 120, the heat can be quickly dispersed to the entire evaporation chamber 230.

[0043] Reference Figure 3 In some embodiments, the heat spreader 200 includes a top cover 210 and a bottom plate 220 that are interlocked with each other, and the evaporation chamber 230 is formed between the top cover 210 and the bottom plate 220. The evaporation chamber 230 is also provided with a heat dissipation support body 250 for supporting the top cover 210 and the bottom plate 220.

[0044] Among them, through the cooperation of the top cover 210 and the bottom plate 220, the installation and molding of the heat spreader 200 can be realized, so that the evaporation chamber 230 and the capillary core 240 are conveniently set in the heat spreader 200, and the capillary core 240 is evenly distributed on the inner surface of the top cover 210 and the bottom plate 220. The mutually buckled parts of the top cover 210 and the bottom plate 220 can be bonded by thermal conductive adhesive to ensure the sealing and thermal conductivity of the evaporation chamber 230. In addition to supporting the mutually buckled top cover 210 and the bottom plate 220, the heat dissipation support body 250 is also used to transfer heat, so as to evenly transfer the heat on the top cover 210 and the bottom plate 220 to the entire evaporation chamber 230, so as to achieve uniform heat dispersion, thereby improving the heat distribution effect in the evaporation chamber 230 and maintaining temperature consistency.

[0045] Furthermore, the heat dissipation support body 250 can be fixedly disposed on the inner surface of the top cover 210 or on the inner surface of the bottom plate 220 , so that when the top cover 210 and the bottom plate 220 are buckled together, the heat dissipation support body 250 can stably support the top cover 210 and the bottom plate 220 .

[0046] Furthermore, the heat dissipation support body 250, the top cover 210 and the bottom plate 220 can be made of aluminum, copper and their alloys with good thermal conductivity. Specifically, the heat spreader 200 in this embodiment can be a VC (Vacuum Coldplate) heat spreader. The VC heat spreader is also called a vacuum cold plate, which has a vacuum cavity with a capillary structure inside, which helps to reduce the thermal conduction resistance of the heat transfer medium, such as the coolant, thereby helping to improve the heat dissipation efficiency.

[0047] In this embodiment, the installation of the heat spreader 200 is achieved through the cooperation of the top cover 210, the bottom plate 220 and the thermal conductive adhesive, the top cover 210 and the bottom plate 220 are stably supported by the heat dissipation support body 250, and the heat on the top cover 210 and the bottom plate 220 is evenly transferred to the entire evaporation chamber 230 through the heat dissipation support body 250, thereby achieving uniform dispersion of heat, thereby improving the heat distribution effect in the evaporation chamber 230.

[0048] In some embodiments, an outer surface of the vapor chamber 200 is coated with an insulating protective layer.

[0049] Since the interior of the vapor chamber 200 is usually made of a high thermal conductivity metal material, and the outer surface of the vapor chamber 200 may be in contact with other components or the environment and may have different potentials, this may cause electromagnetic interference problems or cause a short circuit between two adjacent battery cells. Therefore, in order to avoid the influence of electromagnetic interference on the battery module and avoid a short circuit between two adjacent battery cells, an insulating protective layer needs to be coated on the outer surface of the vapor chamber 200. At the same time, the insulating protective layer can also protect the internal structure of the vapor chamber 200 from being corroded by moisture or other harmful substances, thereby better ensuring the stability and reliability of the vapor chamber 200.

[0050] Specifically, the insulating protective layer in this embodiment can be made of a high molecular polymer material, such as polyimide, hot melt, etc. Since the high molecular polymer material has excellent insulation and heat resistance, an insulating protective layer is formed on the outer surface of the heat spreader 200 to effectively block current and electromagnetic interference.

[0051] Reference Figure 2 , Figure 3 and Figure 4 In some embodiments, the heat-spreading battery module includes a plurality of battery assemblies 100 , and a pressure-resistant member 500 is disposed between two adjacent battery assemblies 100 . A pressure-resistant member 500 is also disposed between the battery cells 120 and the end plates 110 at both ends of the heat-spreading battery module.

[0052] Specifically, during the charge and discharge process of the battery, chemical reactions and thermal effects occur inside the battery, which produce a certain amount of gas and expansion. This may cause the pressure between the battery cells 120 to increase, and have an adverse effect on the structure and performance of the battery. Therefore, a pressure-resistant part 500 is arranged between two adjacent battery cells 120 to provide a certain buffering and energy absorption effect to reduce the pressure generated when the battery expands.

[0053] The anti-pressure part 500 includes a flexible anti-static anti-pressure layer. The flexible anti-static anti-pressure layer in this embodiment can be cut and formed by insulating foam, PU (Polyurethane) foam, anti-static foam, anti-static EPE (Expanded Polyethylene), CR (Chloroprene Rubber), EVA (Ethylene Vinyl Acetate Copolymer), SBR (Styrene Butadiene Rubber), EPDM (Styrene Butadiene Rubber) and the like. Among them, the insulating foam is a foam material made of insulating material, usually made of insulating materials such as polyethylene; PU foam is polyurethane foam; anti-static foam is a foam material with anti-static properties, which eliminates static electricity by adding antistatic agents; anti-static EPE is a polyethylene foam material with anti-static properties; CR is a synthetic rubber material with good chemical resistance and waterproofness. All of the above materials have the characteristics of high elasticity, light weight and rapid pressure-sensitive fixation, so that the pressure generated by the expansion of the battery cell 120 at high temperature can be reduced, that is, the expansion of the battery cell 120 at high temperature can be absorbed.

[0054] Reference Figures 2 to 6 In some embodiments, the heat sink 200 includes at least one vertical portion 260 and a horizontal portion 270 , wherein at least one vertical surface of the vertical portion 260 is pressed against a main surface of a battery cell 120 , and the horizontal portion 270 is connected to the liquid cooling plate 400 via a thermally conductive connector 300 .

[0055] The main surface of the battery cell 120 refers to the outer side surface of the battery cell 120 on both sides of its length direction, which is perpendicular to the side surface of the battery cell 120 parallel to its thickness direction. The vertical portion 260 and the horizontal portion 270 are arranged to increase the heat absorption area of ​​the heat spreader 200 and the contact area between the heat spreader 200 and the liquid cooling plate 400, thereby helping to improve the heat dissipation performance of the battery module. In the specific heat conduction process, the heat is first transferred from the vertical portion 260 to the horizontal portion 270, and then from the horizontal portion 270 to the liquid cooling plate 400.

[0056] Specifically, refer to Figure 5 and Figure 6 The heat spreader 200 includes an L-shaped heat spreader 280 and a U-shaped heat spreader 290, wherein the L-shaped heat spreader 280 includes a horizontal portion 270 and a vertical portion 260, and the U-shaped heat spreader 290 includes a horizontal portion 270 and two vertical portions 260. A U-shaped groove for accommodating the battery cell 120 is formed in the middle of the U-shaped heat spreader 290. The L-shaped heat spreader 280 is arranged on the two outer sides of the battery assembly 100, and the battery cell 120 inside the battery assembly 100 is arranged in the U-shaped groove of the U-shaped heat spreader 290.

[0057] The battery assembly 100 in this embodiment includes a plurality of battery cells 120, and there are also various ways to match the heat spreader 200. Figure 2 In this embodiment, a U-shaped heat spreader 290 and a battery assembly 100 including three battery cells 120 are taken as an example. The battery cell 120 located in the middle of the battery assembly 100 is placed in the U-shaped groove of the U-shaped heat spreader 290, and the outer side surface of each vertical portion 260 of the U-shaped heat spreader 290 is respectively abutted against a main surface of the battery cell 120 at both ends of the battery assembly 100.

[0058] Reference Figure 3 In this embodiment, a U-shaped heat spreader 290 and two L-shaped heat spreaders 280 are used as an example. When the heat spreader 200 is set in the battery module, the U-shaped heat spreader 290 can be plugged and matched with the battery cells 120 at the non-edge of the battery assembly 100. For example, the U-shaped heat spreader 290 can be plugged and matched with the battery cells 120 located at either end of the battery assembly 100, or can be plugged and matched with any battery cell 120 located in the middle of the battery assembly 100. The heat of the remaining battery cells 120 is conducted through the L-shaped heat spreader 280, and the heat spreader 200 is connected to the liquid cooling plate 400 through the thermal conductive connector 300, so that the opposite sides of the two battery cells 120, the side of the battery cells 120 located at both ends close to the end plate 110, and the side of the battery cells 120 close to the liquid cooling plate 400 can all contact with the heat spreader 200, thereby ensuring sufficient heat conduction and further ensuring the heat dissipation performance of the battery module. In addition, a plurality of L-shaped heat spreaders 280 may be used to conduct heat to the battery cells 120 .

[0059] In this embodiment, the cooperation of the L-shaped heat spreader 280 and the U-shaped heat spreader 290 helps to ensure sufficient thermal conductivity between the battery cell 120 and the heat spreader 200 and sufficient heat transfer between the heat spreader 200 and the liquid cooling plate 400, thereby ensuring the heat dissipation performance of the battery module.

[0060] Reference Figure 4 In this embodiment, one or more L-shaped heat spreaders 280 are used as an example. The L-shaped heat spreaders 280 correspond to the battery cells 120 one by one. One battery cell 120 is cooled by one L-shaped heat spreader 280, and the heat spreader 200 is connected to the liquid cooling plate 400 through a thermal conductive connector 300, so that the opposite sides of the two battery cells 120, the side of the battery cell 120 at both ends close to the end plate 110, and the side of the battery cell 120 close to the liquid cooling plate 400 can all contact with the heat spreader 200, thereby ensuring sufficient heat conduction and further ensuring the heat dissipation performance of the battery module.

[0061] Reference Figure 2In some embodiments, the heat conductive connector 300 includes a heat conductive adhesive layer. The heat conductive adhesive layer may be a heat conductive double-sided adhesive. The heat conductive double-sided adhesive is a thermal interface material that helps fill the small gap between the heat vapor chamber 200 and the liquid cooling plate 400 while connecting the heat vapor chamber 200 and the liquid cooling plate 400, thereby improving the heat transfer efficiency and the contact area to achieve better thermal conductivity.

[0062] In some embodiments, the pressure-resistant member 500 is connected to the battery cell 120 via a heat transfer connector. The heat transfer connector includes a heat transfer adhesive layer. The heat transfer adhesive layer in this embodiment can be a heat conductive double-sided adhesive. While the pressure-resistant member 500 is fixed by the heat conductive double-sided adhesive, the heat generated by the battery cell 120 can be transferred to the heat spreader 200.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A heat-spreading battery module, characterized in that: include: At least one battery assembly (100) and end plates (110) arranged at both ends of the heat-equalizing battery module, wherein the battery assembly (100) comprises a plurality of battery cells (120) stacked in sequence; A heat spreader, wherein at least one outer surface of the battery cell (120) dissipates heat through the heat spreader, an evaporation chamber (230) is provided in the heat spreader, a coolant and a heat conductive member for uniform heat conduction are provided in the evaporation chamber (230), a liquid cooling plate (400) is provided on one side of the heat spreader battery module along its length direction, and the liquid cooling plate (400) is connected to the heat spreader via a heat conductive connector (300).

2. The heat-spreading battery module according to claim 1, characterized in that: The heat-spreading element comprises a heat-spreading plate (200), the evaporation chamber (230) is arranged in the heat-spreading plate (200), and the heat-conducting element comprises a plurality of capillary wicks (240) arranged on the cavity wall of the evaporation chamber (230).

3. The heat-spreading battery module according to claim 2, characterized in that: The heat spreader (200) comprises a top cover (210) and a bottom plate (220) that are interlocked, the top cover (210) and the bottom plate (220) are arranged between the top cover (210) and the bottom plate (220) to form the evaporation chamber (230), and a heat dissipation support body (250) for supporting the top cover (210) and the bottom plate (220) is also arranged in the evaporation chamber (230).

4. The heat-spreading battery module according to claim 2, characterized in that: The heat spreader (200) comprises at least one vertical portion (260) and a horizontal portion (270), at least one vertical surface of the vertical portion (260) is pressed against a main surface of one of the battery cells (120), and the horizontal portion (270) is connected to the liquid cooling plate (400) via the heat conductive connector (300).

5. The heat-spreading battery module according to claim 2, characterized in that: An insulating protective layer is coated on the outer surface of the heat spreader (200).

6. The heat-spreading battery module according to claim 1, characterized in that: The heat-equalizing battery module comprises at least two battery assemblies (100), and a pressure-resistant member (500) is provided between two adjacent battery assemblies (100); And / or, a pressure-resistant part (500) is provided between the battery cells (120) and the end plates (110) at both ends of the heat-spreading battery module.

7. The heat-spreading battery module according to claim 2, characterized in that: The heat spreader (200) comprises an L-shaped heat spreader (280) and a U-shaped heat spreader (290), wherein the L-shaped heat spreader (280) is arranged on two outer sides of the battery assembly (100), and the battery cell (120) inside the battery assembly (100) is arranged in a U-shaped groove of the U-shaped heat spreader (290); Alternatively, the heat spreader (200) comprises an L-shaped heat spreader (280), and a vertical surface of a vertical portion (260) of the L-shaped heat spreader (280) is pressed against a main surface of one of the battery cells (120); Alternatively, the heat spreader (200) comprises a U-shaped heat spreader (290), and the two vertical surfaces of each vertical portion (260) of the U-shaped heat spreader (290) are respectively pressed against the main surfaces of two adjacent battery cells (120).

8. The heat-spreading battery module according to claim 1, characterized in that: The thermally conductive connecting member (300) comprises a thermally conductive adhesive layer.

9. The heat-spreading battery module according to claim 6, characterized in that: The pressure-resistant component (500) comprises a flexible antistatic pressure-resistant layer.

10. The heat-spreading battery module according to claim 9, characterized in that: The pressure-resistant component (500) is connected to the battery core (120) via a heat transfer connector.

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