CN219843049U - Battery pack and electricity utilization device - Google Patents

Abstract

The utility model discloses a tray, a heat exchange assembly, a heating element and a battery. The heating element is arranged at the position of the battery adjacent to the side beam, the heat exchange assembly is arranged at one side of the battery, the battery close to the side beam can be effectively heated, the heat dissipation effect of the battery at the position is prevented from being quickened due to the fact that the battery is adjacent to the side beam, the large temperature difference exists between different positions of the battery, the temperature uniformity of the battery is improved, and the battery performance is improved. And the heat exchange component is added in the battery pack, so that the heat exchange performance of the battery pack can be improved, and the temperature uniformity of the battery is further improved.

Description

Battery pack and electricity utilization device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack and an electric device.

Background

In the related art, a battery pack generally includes a tray and a top cover fixedly connected to each other, which enclose a battery installation space in which a battery is accommodated. However, the batteries in the battery installation space have different installation structures corresponding to different positions, and the batteries are easy to have the condition of inconsistent local temperature change, so that larger temperature difference exists between the batteries in different positions, and the battery performance is further influenced.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: aiming at the problem that the temperature difference is large because the local temperature change of the battery in the existing battery pack is inconsistent, the battery pack and the power utilization device are provided.

In order to solve the technical problems, the utility model provides a battery pack, which comprises a tray, a heat exchange assembly, a heating element and a battery; the tray comprises a tray body and side beams, wherein the two side beams are arranged on the tray body at intervals along a first direction; the battery is arranged on the tray body and is positioned between the two side beams, and the side beams are suitable for applying pretightening force to the battery; the heat exchange component is arranged on one side of the battery to exchange heat with the battery; the heating piece is arranged on one side of the battery, and the heating piece is arranged at a position, adjacent to the side beam, of the battery.

In an embodiment of the utility model, the battery has a first surface along the height direction of the battery pack, the heating element is arranged on the first surface, the heating element comprises a first sub-heating element, and two first sub-heating elements are arranged at two ends of the first surface along the first direction at intervals.

In an embodiment of the utility model, the heating element further includes a second sub-heating element, and the two second sub-heating elements are disposed at two ends of the first surface along a second direction at intervals, where the first direction is perpendicular to the second direction.

In an embodiment of the present utility model, the first sub-heating element and the second sub-heating element are electrically connected to each other.

In an embodiment of the utility model, the heat exchange component is disposed on the first surface, and the heating element is disposed on the heat exchange component.

In one embodiment of the present utility model, the heat exchange assembly includes a first converging member, a second converging member, and a plurality of heat exchange members communicating with both the first converging member and the second converging member, and a gap is formed between two adjacent heat exchange members,

the first sub-heating element is arranged on the heat exchange element and/or is arranged in the gap.

In an embodiment of the present utility model, the first converging member and the second converging member are arranged at intervals along a first direction, the heat exchanging member and the gap extend along the first direction, and the plurality of heat exchanging members are arranged at intervals along a second direction;

the heat exchange piece is provided with the first sub-heating piece along two ends in the first direction respectively, and/or the gap is provided with the first sub-heating piece along two ends in the first direction respectively, and the first direction is perpendicular to the second direction.

In an embodiment of the present utility model, the heating element further includes a second sub-heating element, the outermost heat exchange element of the plurality of heat exchange elements in the second direction is a first heat exchange element, and the second sub-heating element is disposed on the first heat exchange element and located between two adjacent first sub-heating elements; and/or the outermost gaps of the gaps in the second direction are first gaps, and the second sub-heating elements are arranged in the first gaps and are positioned between two adjacent first sub-heating elements.

In an embodiment of the present utility model, the second sub-heating element is disposed between any two adjacent first sub-heating elements along the first direction.

In an embodiment of the utility model, the heat exchange assembly further includes a fixing plate, the heat exchange member is disposed on the fixing plate, the first sub-heating member is disposed on the heat exchange member, and/or the first sub-heating member is disposed on the fixing plate.

In an embodiment of the utility model, the heat exchange assembly includes a temperature equalizing plate and a flow channel plate, the flow channel plate is provided with a plurality of heat exchange flow channels arranged at intervals, the temperature equalizing plate is connected with the flow channel plate to seal the heat exchange flow channels, and the heating element is arranged on the temperature equalizing plate or the flow channel plate.

On the other hand, the embodiment of the utility model also discloses an electric device which comprises the battery pack.

The beneficial effects of the utility model are as follows: according to the utility model, the heating element is arranged at the position of the battery adjacent to the side beam, and the heat exchange assembly is arranged at one side of the battery, so that the battery close to the side beam can be effectively heated, the heat dissipation effect of the battery at the position is prevented from being quickened due to the fact that the battery is adjacent to the side beam, a large temperature difference exists between different positions of the battery, the temperature uniformity of the battery is improved, and the battery performance is improved. And the heat exchange component is added in the battery pack, so that the heat exchange performance of the battery pack can be improved, and the temperature uniformity of the battery is further improved.

Drawings

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model.

Fig. 2 is a top view of a battery pack according to an embodiment of the present utility model.

Fig. 3 is a schematic view of a heating element according to an embodiment of the present utility model.

Fig. 4 is an exploded view of a heat exchange assembly according to an embodiment of the present utility model.

Reference numerals in the specification are as follows:

10. a battery pack;

100. a battery;

110. a heat exchange assembly; 111. a first confluence member; 112. a second confluence member; 113. a heat exchange member; 1131. a first heat exchange member; 114. a gap; 1141. a first gap; 115. a fixing plate;

120. a heating member; 121. a first sub-heating member; 122. a second sub-heating member;

130. a tray, 131, a tray body; 132. edge beams;

140. an upper cover; 150. and (5) protecting the plate.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the embodiment of the present utility model, as shown in fig. 1, for convenience of description, a first direction is defined as an X direction, i.e., a length direction of the battery pack 10, a second direction is defined as a Y direction, i.e., a width direction of the battery pack 10, and a height direction of the battery pack 10 is defined as a Z direction.

The utility model discloses a battery pack 10, as shown in fig. 1, the battery pack 10 comprises a tray 130, a heat exchange assembly 110, a heating element 120 and a battery 100. The tray 130 includes a tray body 131 and side beams 132, and the two side beams 132 are disposed on the tray body 131 along a first direction at intervals. The battery 100 is disposed on the tray body 131 and between two adjacent side beams 132, and the side beams 132 apply a pre-tightening force to the battery 100. Specifically, since the peripheral boundary of the battery contacting environment is large and the position of the battery 100 contacting the tray edge beam 132 is accelerated according to the whole pack structure, the temperature of the battery 100 contacting the edge beam 132 is lower than that of the battery 100 in other regions. The heating member 120 is thus disposed at one side of the battery 100, and the heating member 120 is disposed at a position of the battery 100 adjacent to the side rail 132. The battery 100 adjacent to the side beam 132 can be effectively heated, the heat dissipation effect of the battery 100 at the position is prevented from being quickened due to the adjacent side beam 132, the larger temperature difference exists between different positions of the battery 100, the temperature uniformity of the battery 100 is improved, and the performance of the battery 100 is improved. And the heat exchange assembly 110 is added in the battery pack 10, so that the heat exchange performance of the battery pack 10 can be improved, and the temperature uniformity of the battery 100 is further improved.

Specifically, in the embodiment of the present utility model, as shown in fig. 1, the battery 100 may be composed of a plurality of electric cells (not labeled in the drawing), the plurality of electric cells (not labeled in the drawing) being arranged along the first direction and each of the electric cells extending along the second direction. In addition, the battery 100 may be only one cell, which extends along the first direction and the second direction, respectively. Further, the battery cell is provided with a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively arranged at two ends of the battery cell along the second direction. The series-parallel connection is realized between the electric cores through the electric connection sheet.

In an embodiment of the present utility model, as shown in fig. 1, the battery pack 10 includes a tray 130, an upper cover 140, and a cover plate 150. The tray 130 and the upper cover 140 are arranged in the height direction of the battery pack 10 and are hermetically connected to form an accommodating space for accommodating the battery 100. The cover 150 is disposed on a side of the tray 130 away from the upper cover 140 to improve the protection capability of the bottom of the tray 130.

Further, in an embodiment of the present utility model, the tray includes a tray body and a plurality of side beams, wherein the side beams are disposed on the tray body. The side beams are arranged at intervals along the first direction, and batteries are arranged between two adjacent side beams. Specifically, as shown in fig. 1, two side beams 132 are disposed at intervals along the first direction and the battery cell is disposed between the two side beams 132. The edge beam 132 is used to apply a pre-tightening force to the battery 100, prevent the battery 100 from moving, and also limit the expansion of the battery 100 to a certain extent. In general, the side beam 132 is provided on the large-surface side of the battery 100 to increase the contact area with the battery 100 and to increase the restraining capability of the battery 100. In another embodiment of the present utility model, the plurality of side beams may be arranged along the second direction, for example, two side beams are arranged at intervals along the second direction, two side beams are arranged at intervals along the first direction, and four side beams are connected end to form a frame, and the battery is placed in the frame. The side beams arranged along the first direction or the side beams arranged along the second direction apply pretightening force to the battery so as to reduce battery movement. In other embodiments of the present utility model, the side beams may also be crossed to form grids, and batteries may be disposed in each grid.

In one embodiment of the present utility model, as shown in FIGS. 1-2, the heat exchange assembly 110 is generally a cooling member, such as a liquid cooled plate or a direct cooled plate. The heat exchange assembly 110 is used for exchanging heat with the battery 100 to realize cooling of the battery 100. In other embodiments of the present utility model, the heat exchange assembly 110 may be a cold and hot integrated component, so that the battery 100 can be heated and cooled by the same assembly. For example, a direct cooling and heating system. The system is used for realizing cooling or heating of the battery through different temperatures of the inflowing media.

Further, in an embodiment of the present utility model, as shown in fig. 1-2, the heat exchange assembly 110 may be disposed at one side of the battery 100 in the height direction. Specifically, the heat exchange assembly is arranged between the battery and the tray so as to exchange heat for the battery. Or the heat exchange assembly 110 is disposed at a side of the battery 100 remote from the tray 130. Furthermore, in other embodiments of the utility model, the heat exchange assembly may also be disposed between the battery and the edge beam 132. Alternatively, when the battery is composed of a plurality of cells, the heat exchange assembly 110 is disposed between the cells.

In one embodiment of the present utility model, as shown in fig. 3, the heating member 120 is a heating film or a heating plate. Generally, the heating element includes a heating core and insulating layers disposed on both sides of the heating core. The heating element generally heats the heating core by energizing the heating core, thereby realizing heating. Wherein, the heating core body can be made of metal such as brass, stainless steel, cupronickel, etc. The heating core body can selectively heat the metal wire or the metal sheet. The metal wires and the metal sheets are different in size, and generally all the materials belong to metals. In addition, the heating core may be carbon-based polymer with PTC effect, ceramic with PTC effect, or the like. The PTC heating core material is a core body capable of automatically controlling temperature, has a positive temperature effect and is commonly applied to the heating core material in the PTC heating film. The insulating layer is made of insulating materials such as PI polyamide grease, PET or mica, the thickness of the insulating layer can be determined according to the insulating performance requirement, and the specific thickness is not limited. The heating core body and the insulating film are hot pressed together through thermosetting glue. The specific material selection can be changed according to actual conditions, and the utility model is not limited in any way. Further, in the embodiment of the present utility model, as shown in fig. 1, the heating member 120 may be coated with a double-sided tape, and the heating film may be adhered to the heat exchange assembly 110 or the battery 100 through the double-sided tape. In addition, the heating element 120 may be adhered to the heat exchange assembly 110 or the battery 100 by applying a thermosetting adhesive, and then the heating film is hot-pressed on the heat exchange assembly 110 by a hot-pressing or rolling process.

Further, in the embodiment of the present utility model, the area and power of the heating element may be determined according to the temperature difference between different positions of the battery during the test.

In the embodiment of the present utility model, as shown in fig. 1-2, the battery 100 has a first surface in the height direction of the battery pack 10. The first surface may be a side of the battery 100 adjacent to the tray body 131 or a side remote from the tray body 131. The heating member 120 is disposed at the first surface, and in particular, the heating member 120 may be disposed directly on the first surface in contact with the first surface of the battery 100. The heating element 120 may also be disposed above the first surface with other components, such as heat conductive glue, heat exchange assembly 110, etc., between the heating element and the first surface of the battery 100. Further, as shown in fig. 1 to 3, the heating member 120 includes first sub-heating members 121, and two first sub-heating members 121 are disposed at both ends of the first surface in the first direction at intervals. The heating element 120, i.e. the first sub-heating element 121, is disposed at two ends of the first surface of the battery 100 along the first direction, so as to not only increase the temperature of the battery 100 at the position corresponding to the boundary beam 132, so as to reduce the occurrence of large temperature differences at different positions of the battery 100, but also facilitate the installation and setting of the heating element 120, and improve the assembly process of the battery 100. Preferably, the heating member 120 is disposed at a first surface of the battery 100 remote from the tray 130. The heating member 120 is disposed on the first surface, so as to improve the safety of the heating member 120, avoid the risk of short circuit caused by the heating member 120 puncturing the heating member when the battery pack 10 is collided, and improve the safety of the battery pack 10. Preferably, the first surface is a surface of the battery 100 on a side remote from the tray 130 in the height direction of the battery pack. The heating member 120 is disposed on the first surface, so that the safety of the heating member can be improved, the risk of short circuit caused by damage of the heating member 120 when the battery pack is collided can be avoided, and the safety of the battery pack 10 can be improved.

In the embodiment of the present utility model, as shown in fig. 1-2, the heating element 120 further includes second sub-heating elements 122, and two second sub-heating elements 122 are disposed at two ends of the first surface along the second direction at intervals. Specifically, as can be seen from the temperature analysis of the battery pack 10, for the battery 100 in the battery pack 10, the tray 130 of the battery pack 10 is usually made of metal, so that the temperature around the battery 100 is lower than the temperature in the middle of the battery 100, and in the embodiment of the utility model, not only the first sub-heating element 121 but also the second sub-heating element 122 is added at two ends of the first surface along the second direction to increase the temperature around the battery 100, thereby ensuring the uniformity of the temperatures at different positions of the battery 100 and improving the performance of the battery 100. Further, since the heat dissipation effect of the battery 100 near the side beam 132 is better than that of other positions, the temperature of the battery 100 near the side beam 132 is lower than that of other positions in the periphery of the battery 100, so that the power of the first heating element 120 is higher than that of the second heating element 120 to reduce the temperature difference between the two corresponding positions.

In the embodiment of the present utility model, as shown in fig. 3, the first sub-heating member 121 and the second sub-heating member 122 are electrically connected to each other. Namely, the first sub-heating element 121 and the second sub-heating element 122 are connected in series or in parallel, so that the number of circuits for connecting the heating element 120 with an external power supply can be reduced, the risk of short circuit and arc discharge due to circuit breakage can be reduced, the manufacturing of the heating element 120 can be facilitated, and the production cost can be reduced. Preferably, the first sub-heating member 121 is integral with the second sub-heating member 122.

In the embodiment of the present utility model, as shown in fig. 1-2, the heat exchange assembly 110 is disposed on the first surface, and the heating element 120 is disposed on the heat exchange assembly 110. The heating element 120 is disposed on the heat exchange assembly 110, so as to avoid the risk of direct contact between the heating element 120 and the battery 100, and further prevent the risk of short circuit due to contact between the heating element 120 and the battery 100 caused by damage, and improve the safety of the battery 100.

In the first embodiment of the present utility model, the heat exchange component 110 is a harmonica-type heat exchange system, and the harmonica-type heat exchange system has the advantages of low cost, light weight, relatively simple structure, high production efficiency and the like, so that the heat exchange component 110 can reduce the cost and weight of the battery pack by selecting the harmonica-type heat exchange system, realize the lightweight of the battery pack, shorten the manufacturing cost of the battery pack, and reduce the production cost of the battery pack. Specifically, as shown in fig. 1-2, the heat exchange assembly 110 includes a first confluence member 111, a second confluence member 112, and a plurality of heat exchange members 113 communicating with both the first confluence member 111 and the second confluence member 112, and a gap 114 is provided between two adjacent heat exchange members 113, wherein a first sub-heating member 121 is disposed on the heat exchange members 113, and/or the first sub-heating member 121 is disposed in the gap 114. Specifically, the heat exchange member 113 has a plurality of heat exchange channels therein so that heat exchange medium channels are formed, and the first converging member 111 and the second converging member 112 are also provided with converging pipes therein, wherein one end of the heat exchange member 113 is connected with the first converging member 111, and the other end is connected with the second converging member 112, so that the heat exchange pipes are communicated with the corresponding converging pipes, so as to realize circulation of heat exchange medium. One of the first converging member 111 and the second converging member 112 is a liquid inlet converging pipe, the other is a liquid outlet converging flow passage, or one of the first converging member 111 and the second converging member 112 is a liquid inlet converging pipe, and the other is a liquid outlet converging pipe connected with an external water inlet and outlet pipeline. The plurality of heat exchange pieces 113 are arranged at intervals, and gaps 114 are formed between two adjacent heat exchange pieces 113. In the embodiment of the present utility model, as shown in fig. 1-2, the first sub-heating member 121 may be disposed only on the heat exchanging member 113, and the heating effect of the first sub-heating member 121 may be transferred to the battery 100 through the heat exchanging member 113, so as to heat the battery 100. And the first sub-heating member 121 is provided on the heat exchanging member 113 to facilitate the installation and setting of the heating member 120. Alternatively, the first sub-heating element 121 may be disposed in the gap 114, and the first sub-heating element 121 disposed in the gap 114 may make the combined parts of the heat exchange assembly 110 and the heating element 120 smoother, and has compact utilization space, thereby improving the space utilization rate of the battery pack 10. Still alternatively, the first sub-heating member 121 is disposed on the heat exchanging member 113 and the gap 114. The above arrangement can simplify the processing of the first sub-heating element 121, and facilitate the installation, maintenance and replacement of the heating element 120.

Further, the utility model defines the arrangement of the heat exchange assemblies 110 by defining the arrangement direction of the converging members and the heat exchange members 113 of the heat exchange assemblies 110. Specifically, in an embodiment of the present utility model, as shown in fig. 1-2, the first bus member 111 and the second bus member 112 are disposed at intervals along the first direction, the heat exchange members 113 and the gaps 114 extend along the first direction, and the plurality of heat exchange members 113 are arranged at intervals along the second direction. Wherein, the heat exchanging element 113 is provided with first sub-heating elements 121 at two ends along the first direction, and/or the gap 114 is provided with first sub-heating elements 121 at two ends along the first direction. In this embodiment, the battery 100 has a plurality of battery cells arranged in the first direction and extending in the second direction, and each of the battery cells is provided with a positive electrode terminal and a negative electrode terminal at both ends in the second direction, respectively. Under high temperature environment, when the battery cell group is in the working state, the heat generation at the positive terminal and the negative terminal at the two ends of the battery 100 is higher than the middle part of the battery 100, so that the temperature at the two ends of the battery 100 is higher than the middle temperature, the battery 100 is cooled at the moment, and the cooling at the two ends of the battery 100 is preferentially considered, at the moment, the cooling function of the heat exchange component 110 can be utilized to cool the battery 100, namely, the heat exchange piece 113 at the outermost position along the second direction can be used as a runner inlet, and the heat exchange piece 113 at the middle position can be used as a runner outlet, therefore, a heat exchange medium flows through the two ends of the battery 100 at the higher temperature first and then flows through the middle position of the battery 100 at the lower temperature, the temperature difference between the two ends of the battery 100 and the middle can be reduced, and the thermal uniformity of the battery 100 is improved. In a low-temperature environment, the battery 100 needs to be heated, and the battery 100 can be heated by using the heating function of the heat exchange assembly 110, so that the temperature of the battery 100 is not too low, and the battery 100 can be ensured to work normally, at the moment, the flow direction of the heat exchange medium in the heat exchange assembly 110 is opposite to the flow direction during cooling, that is, the heat exchange medium flows through the middle position of the battery 100 first and then flows through the two ends of the battery 100, so as to heat the battery 100. The heat exchange members 113 disclosed by the utility model extend along the first direction and are arranged at intervals along the second direction, so that the cooling or heating effect on different positions of the battery 100 can be improved, and the temperature uniformity of the battery 100 can be further improved. Further, the outermost heat exchange member 113 of the plurality of heat exchange members 113 along the second direction is a first heat exchange member 1131, and the second sub-heating member 122 is disposed on the first heat exchange member 1131 and located between two adjacent first sub-heating members 121; and/or, the outermost gaps 114 of the plurality of gaps 114 along the second direction are first gaps 1141, and the second sub-heating elements 122 are disposed in the first gaps 1141 and between two adjacent first sub-heating elements 121, so as to effectively increase the ambient temperature of the battery 100, and achieve the temperature uniformity of the battery 100.

In another embodiment of the present utility model, the first converging member and the second converging member are disposed at intervals along the second direction, the heat exchanging members and the gaps extend along the second direction, and the plurality of heat exchanging members are arranged at intervals along the first direction. Wherein, the heat exchange members at two ends of the plurality of heat exchange members along the first direction are respectively provided with a first sub-heating member, and/or the gaps at two ends of the plurality of gaps 114 along the first direction are respectively provided with a first sub-heating member. The heat exchange pieces 113 disclosed by the utility model can be conveniently arranged along the second direction, namely, the heat exchange pieces close to the side beams are the whole heat exchange pieces extending along the second direction, and the first sub-heating pieces are arranged at the upper parts of the heat exchange pieces without interval treatment. Further, the second sub-heating elements are respectively arranged at two ends of the heat exchange element along the second direction, and/or the second sub-heating elements are respectively arranged at two ends of the gap along the first direction, so that the temperature of the periphery of the battery is effectively improved, and the temperature uniformity of the battery is realized.

Further, in the embodiment of the present utility model, the second sub-heating element 122 is disposed between the two oppositely disposed sub-heating elements, so that the whole heating element is disposed on the whole heat exchange assembly, the heating area of the heating element is increased, and the processing and manufacturing of the heating element are facilitated.

In the practice of the present utility model, as shown in fig. 4, the heat exchange assembly further comprises a fixing plate 115, and the heat exchange member is disposed on the fixing plate 115. The heat exchange assembly is provided with the fixing plate 115, so that the flatness of the installation of the heat exchange piece can be improved, and the heat exchange efficiency of the heat exchange piece can be improved when the fixing plate 115 selects heat conduction temperature equalization plates such as metal plates. Typically, the heat exchange member and the fixing plate 115 may be fixedly coupled by welding or bonding. Further, the first sub-heating element and/or the second sub-heating element may be disposed on the heat exchanging element, or may be disposed on the fixing plate 115, i.e. in a gap between two adjacent heat exchanging elements.

In an embodiment of the present utility model, the first sub-heating element and/or the second sub-heating element may be further disposed on the first confluence element and the second confluence element. Specifically, the first sub-heating element and/or the second sub-heating element can be arranged on the heat exchange element and can extend to the first converging element and/or the second converging element, so that the heating area of the heating element is enlarged, and the heating efficiency is improved.

In a second embodiment of the utility model, the heat exchange assembly is a stamped brazing sheet heat exchange system. The stamping brazing plate type heat exchange system has the advantages of being capable of designing an internal flow passage at will, large in contact area, good in heat exchange effect, high in production efficiency, good in pressure resistance and strength and the like. Therefore, the heat exchange assembly selects the stamping brazing plate type heat exchange system, the heat exchange effect on the battery can be improved, and the temperature control of the battery is more uniform. Specifically, the heat exchange assembly comprises a temperature equalizing plate and a flow passage plate. The runner plate is provided with a plurality of heat exchange runners which are arranged at intervals. The temperature equalizing plate is connected with the runner plate to seal the heat exchange runner, and the heating element is arranged on the temperature equalizing plate or the runner plate. Specifically, the flow channel plate has a recess in the height direction of the battery pack to form a heat exchange flow channel that extends in the first direction or in the second direction. The temperature equalizing plate is connected with the flow passage plate to seal the heat exchange flow passage in the height direction of the battery pack. The heating element may be arranged on the temperature equalization plate or on the flow channel plate. Since the temperature equalizing plate is a flat plate, it is preferable that the heating member is provided on the temperature equalizing plate so as to facilitate the installation of the heating member. Further, the two ends of the temperature equalizing plate or the flow channel plate along the first direction are provided with first sub-heating elements. Still further, the two ends of the temperature equalizing plate or the flow channel plate along the second direction are provided with second sub-heating elements.

In summary, in the battery pack 10 disclosed in the present utility model, the heating element 120 is disposed at the position of the battery 100 close to the edge beam 132 to increase the temperature of the position of the battery 100, and the heat exchange assembly 110 is combined to achieve temperature equalization at different positions of the battery 100, so as to improve the performance of the battery pack 10.

In a second aspect, in an embodiment of the present utility model, an electrical device is also disclosed, which includes the battery pack described above. Specifically, the electric device may be an energy storage cabinet, an electric automobile, or the like.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Claims (12)

1. A battery pack is characterized by comprising a tray, a heat exchange assembly, a heating element and a battery;

the tray comprises a tray body and side beams, wherein the two side beams are arranged on the tray body at intervals along a first direction;

the battery is arranged on the tray body and is positioned between the two side beams, and the side beams are suitable for applying pretightening force to the battery;

the heat exchange component is arranged on one side of the battery to exchange heat with the battery;

the heating piece is arranged on one side of the battery, and the heating piece is arranged at a position, adjacent to the side beam, of the battery.

2. The battery pack according to claim 1, wherein the battery has a first surface in a height direction of the battery pack, the heating member is provided on the first surface, the heating member includes first sub-heating members, and two of the first sub-heating members are provided at both ends of the first surface in the first direction at intervals.

3. The battery pack according to claim 2, wherein the heating member further comprises a second sub-heating member, two of the second sub-heating members being disposed at both ends of the first surface in a second direction at an interval, the first direction being perpendicular to the second direction.

4. The battery pack of claim 3, wherein the first sub-heating member and the second sub-heating member are electrically connected to each other.

5. The battery pack of any one of claims 2-4, wherein the heat exchange assembly is disposed on the first surface and the heating element is disposed on the heat exchange assembly.

6. The battery pack of claim 5, wherein the heat exchange assembly comprises a first manifold member, a second manifold member, and a plurality of heat exchange members in communication with each of the first and second manifold members, wherein a gap is provided between adjacent two of the heat exchange members,

the first sub-heating element is arranged on the heat exchange element and/or is arranged in the gap.

7. The battery pack according to claim 6, wherein the first and second bus members are arranged at intervals in a first direction, the heat exchange members and the gaps each extend in the first direction, and the plurality of heat exchange members are arranged at intervals in a second direction;

the heat exchange piece is provided with the first sub-heating piece along two ends in the first direction respectively, and/or the gap is provided with the first sub-heating piece along two ends in the first direction respectively, and the first direction is perpendicular to the second direction.

8. The battery pack according to claim 7, wherein the heating member further comprises a second sub-heating member, the heat exchanging members outermost in the second direction are first heat exchanging members, and the second sub-heating member is provided on the first heat exchanging member between two adjacent first sub-heating members; and/or the outermost gaps of the gaps in the second direction are first gaps, and the second sub-heating elements are arranged in the first gaps and are positioned between two adjacent first sub-heating elements.

9. The battery pack according to claim 8, wherein the second sub-heating members are provided between any adjacent two of the first sub-heating members in the first direction.

10. The battery pack according to any one of claims 6 to 9, wherein the heat exchange assembly further comprises a fixing plate on which the heat exchange member is provided, the first sub-heating member is provided on the heat exchange member, and/or the first sub-heating member is provided on the fixing plate.

11. The battery pack according to claim 5, wherein the heat exchange assembly comprises a temperature equalizing plate and a flow channel plate, the flow channel plate is provided with a plurality of heat exchange flow channels arranged at intervals, the temperature equalizing plate is connected with the flow channel plate to seal the heat exchange flow channels, and the heating element is arranged on the temperature equalizing plate or the flow channel plate.

12. An electrical device comprising a battery pack according to any one of claims 1 to 11.