Battery cell module
By combining heat exchange plates and phase change materials in the battery cell module, the thermal management problem of the battery cell module at extreme temperatures is solved, efficient temperature control and space utilization are achieved, and the heating efficiency and safety of the battery cell is improved. .
Patent Information
- Application Number
- CN202323372907.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-12
AI Technical Summary
The existing battery cell modules lack effective cooling methods at extreme temperatures, resulting in a sharp increase in battery temperature, triggering heat out of control and safety issues, and the use of liquid or gas heat exchange requires additional space, occupying module space.
A reasonable thermal management system was designed, using a heat exchange plate and a phase change material to absorb heat through the phase change material to achieve cell heating and heat dissipation, and a heat exchange plate was set between the cell strips to improve space utilization and Heating efficiency, use heating wire, heating film or heat conducting medium for side heating.
It realizes effective management of battery cell temperature without occupying too much space, improves space utilization and the safety of the whole package, reduces costs, and improves the heating efficiency and stability of the battery cell.
Smart Images
Figure CN222261196U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery core module. Background Art
[0002] Modules made of several batteries are common components in power systems because they are easy to reassemble and group. To ensure that the modules can operate under extreme temperatures, high requirements are placed on the thermal management of the modules.
[0003] The existing thermal management system of the battery cell module will give priority to using heating wires and heating films to heat the battery cells for cost considerations, which can ensure that the system works above a certain temperature. However, the assembled module system lacks reasonable cooling means. Under high-rate charge and discharge conditions, the battery temperature will rise sharply and trigger thermal runaway of the battery, causing safety issues. If liquid or gas is used as a medium for heat exchange with the battery, additional special pipes or air ducts need to be designed, which takes up a lot of battery cell module space and is insufficient. Utility Model Content
[0004] The utility model aims to improve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module with a reasonable thermal management system structure without occupying too much battery module space.
[0005] According to the first aspect of the present invention, the battery cell module includes:
[0006] A plurality of battery cell strips, each of which is composed of a plurality of battery cells;
[0007] Heat exchange plate, the heat exchange plate is arranged on one side of the battery core strip and / or
[0008] The heat exchange plate is provided with a heating device at the gap between the battery cells to achieve the heating function of the battery cells;
[0009] End plate; the end plate is fixedly mounted on the end surface of the battery cell strip;
[0010] A side plate, wherein the side plate is mounted on the side of the battery strip away from the heat exchange plate, and the side plate cooperates with the end plate to constrain the periphery of the battery strip and bear the expansion force of the battery strip;
[0011] A bottom plate is installed at the bottom of the battery cell strip, and a phase change material layer is provided on the surface of the bottom plate close to the battery cell strip.
[0012] According to the battery cell module of the embodiment of the utility model, a reasonable thermal management design is adopted according to different battery cell modules to realize the heating function of the battery. At the bottom of the module, a phase change material is arranged to contact the battery cell, and the phase change temperature is generally selected to be about 50 degrees. When the temperature of the battery cell reaches 50 degrees, the heat of the battery cell is absorbed by the phase change material. Before the phase change material completely changes phase, the heat will be mainly absorbed to promote the phase change of the material, and the overall temperature of the battery cell module system does not change significantly. When facing the module design of more than two columns of battery cells, a heat exchange plate is arranged between the two columns of battery cells, while taking into account the role of bearing expansion force, so as to realize the heating of the side of the battery cell and facilitate the heat dissipation of the bottom of the module. In addition, because multiple columns of battery cells are merged into one module, the gap setting between the modules is eliminated, which improves the space utilization rate of the whole package. At the same time, due to the increase in the degree of integration, the watt-hour cost of the whole package will be reduced.
[0013] In a possible implementation of the first aspect, the cross-sectional shape of the heat exchange plate between the battery cell bars is any one of I-shaped, T-shaped, and I-shaped to meet the stiffness requirements of different battery cell modules. Compared with traditional single-row battery cell modules, the volume utilization rate is increased by about 10%.
[0014] In a possible implementation of the first aspect, mounting grooves are provided on both sides of the heat exchange plate, and the heating device is an electric heating wire, which is arranged in the mounting groove. The connection terminal of the heating wire passes through and extends out of the end plate, thereby achieving side heating of the battery cell while bearing the expansion force.
[0015] In a possible implementation of the first aspect, heating devices are respectively installed on both sides of the heat exchange plate, and the heating devices are electric heating films. The connection terminals of the electric heating films pass through and extend out of the end plates, thereby achieving side heating of the battery cells while bearing the expansion force.
[0016] In a possible implementation of the first aspect, a heating channel is provided in the side wall of the heat exchange plate, and a heat-conducting medium is filled in the heating channel. The inlet and outlet of the heating channel respectively pass through the end plate. Liquid heat is used for heating more gently, and the heating of the battery cell side is achieved with higher stability and greater safety.
[0017] In a possible implementation of the first aspect, the end plate is provided with a slot to facilitate the heat exchange plate to be inserted into the slot for vertical fixation, which is beneficial for the heat exchange plate to evenly heat the battery cells on both sides and avoid the risk of uneven heating due to instability of the heat exchange plate.
[0018] In a possible implementation manner of the first aspect, a heat conducting sheet is provided on a side wall of the battery cell strip close to the heating flow channel to improve the heating efficiency of the battery cell.
[0019] In a possible implementation of the first aspect, the heating flow channel is fin-shaped, which increases the heat exchange area and improves the heating efficiency of the battery core.
[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 It is a schematic diagram of the structure of a battery cell module including more than two battery cell strips according to an embodiment of the utility model;
[0023] Figure 2 It is a schematic diagram of the structure of a battery module of a battery strip according to an embodiment of the utility model;
[0024] Figure 3 This is a schematic diagram of the heat exchange plate structure of the battery module according to an embodiment of the utility model;
[0025] Figure 4 This is a schematic diagram of a T-shaped structure of a heat exchange plate of a battery module according to an embodiment of the utility model;
[0026] Figure 5 It is a schematic diagram of the structure of an I-type heat exchange plate in which the battery core module adopts a heating wire as a heating device according to an embodiment of the utility model.
[0027] Reference numerals:
[0028] The battery cell strip 100 , the heat exchange plate 200 , the end plate 300 , the side plate 400 , and the bottom plate 500 . DETAILED DESCRIPTION
[0029] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate 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 an intermediate element at the same time.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0032] The terms "first", "second", "third", etc. in the specification and claims of the present application and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a series of steps or units are included, or optionally, steps or units not listed are included, or optionally, other steps or units inherent to these processes, methods, products or devices are included.
[0033] Only the part relevant to the present application but not all content is shown in the accompanying drawings.Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processing or methods described as flow charts.Although flow charts describe various operations (or steps) as sequential processing, many operations therein can be implemented in parallel, concurrently or simultaneously.In addition, the order of various operations can be rearranged.Described processing can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings.Described processing can correspond to method, function, procedure, subroutine, subprogram etc.
[0034] As used in this specification, the terms "component", "module", "system", "unit", etc. are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or distributed between two or more computers. In addition, these units can be executed from various computer-readable media having various data structures stored thereon. Units can communicate through local and / or remote processes, for example, based on signals having one or more data packets (e.g., data from a second unit interacting with another unit in a local system, a distributed system, and / or a network. For example, the Internet interacts with other systems via signals).
[0035] Example 1
[0036] According to the first aspect of the present invention, the battery cell module includes:
[0037] A plurality of battery cell strips 100, each of which is composed of a plurality of battery cells;
[0038] The heat exchange plate 200 is disposed on one side of the battery cell strip 100 and / or
[0039] At the gap between the battery cell strips 100 and the battery cell strips 100, the heat exchange plate 200 is provided with a heating device for heating the battery cell strips;
[0040] End plate 300; the end plate 300 is fixedly mounted on the end surface of the battery cell strip 100;
[0041] A side plate 400, wherein the side plate 400 is installed on the side of the battery cell strip 100 away from the heat exchange plate 200, and the side plate 400 cooperates with the end plate 300 to constrain the periphery of the battery cell strip 100 and bear the expansion force of the battery cell strip 100;
[0042] The bottom plate 500 is installed at the bottom of the battery cell strip 100 , and a phase change material layer is provided on the surface of the bottom plate 500 close to the battery cell strip 100 .
[0043] According to the battery cell module of the embodiment of the utility model, a reasonable thermal management design is adopted according to different battery cell modules to realize the heating function of the battery. At the bottom of the module, a phase change material is arranged to contact the battery cell, and the phase change temperature is generally selected to be about 50 degrees. When the temperature of the battery cell reaches 50 degrees, the heat of the battery cell is absorbed by the phase change material. Before the phase change material completely changes phase, the heat will be mainly absorbed to promote the phase change of the material, and the overall temperature of the battery cell module system does not change significantly. When facing the module design of more than two columns of battery cells, a heat exchange plate is arranged between the two columns of battery cells, while taking into account the role of bearing expansion force, so as to realize the heating of the side of the battery cell and facilitate the heat dissipation of the bottom of the module. In addition, because multiple columns of battery cells are merged into one module, the gap setting between the modules is eliminated, which improves the space utilization rate of the whole package. At the same time, due to the increase in the degree of integration, the watt-hour cost of the whole package will be reduced.
[0044] It should be noted that after the single battery cell module is assembled, a heating film or heating wire structure is used in the opening area on the side of the module to realize the heating function of the battery. Specifically, it works under low temperature conditions and is generally enabled when the ambient temperature is below 0 degrees. At the bottom of the module, a phase change material is set to contact the battery cell. The phase change temperature is generally selected to be about 50 degrees. When the battery cell temperature reaches 50 degrees, the phase change material absorbs the heat of the battery cell. Before the phase change material completely changes phase, the heat will be mainly absorbed to promote the phase change of the material, and the system temperature has no obvious change.
[0045] Optionally, after two or more battery cell modules are grouped, the cross-sectional shape of the heat exchange plate 200 between the battery cell bars 100 is any one of I-shaped, T-shaped, and I-shaped to meet the stiffness requirements of different battery cell modules. Compared with traditional single-row battery cell modules, the volume utilization rate is increased by about 10%.
[0046] It should be noted that mounting grooves are provided on both sides of the heat exchange plate 200, and the heating device is an electric heating wire, which is arranged in the mounting groove. The terminal of the heating wire passes through and extends out of the end plate 300, so as to realize the side heating of the battery cell while bearing the expansion force.
[0047] Optionally, heating devices are installed on both sides of the heat exchange plate 200, and the heating devices are electric heating films. The connection terminals of the electric heating films pass through and extend out of the end plate 300, so as to realize side heating of the battery cell while bearing the expansion force.
[0048] Optionally, a heating channel is provided in the side wall of the heat exchange plate 200, and a heat-conducting medium is filled in the heating channel. The inlet and outlet of the heating channel pass through the end plate 300 respectively. Liquid heat is used for heating more gently, and the heating of the battery side is achieved with higher stability and greater safety.
[0049] It should be noted that the end plate 300 is provided with a slot, which facilitates the heat exchange plate 200 to be inserted into the slot for vertical fixation, which is beneficial for the heat exchange plate 200 to heat the battery cells on both sides evenly and avoids the risk of uneven heating due to the instability of the heat exchange plate.
[0050] Optionally, a heat conducting sheet is provided on the side wall of the battery cell strip 100 close to the heating channel to improve the heating efficiency of the battery cell.
[0051] Optionally, the heating flow channel is fin-shaped to increase the heat exchange area and improve the heating efficiency of the battery core.
[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "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 invention 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 utility model.
[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0054] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A battery cell module, characterized in that: include: A plurality of battery cell strips (100), wherein the battery cell strips are composed of a plurality of battery cells; A heat exchange plate (200), the heat exchange plate (200) being arranged on one side of the battery cell strip (100) and / or in a gap between battery cell strips (100), and the heat exchange plate (200) being provided with a heating device; An end plate (300); the end plate (300) is fixedly mounted on the end surface of the battery cell strip (100); A side plate (400), wherein the side plate (400) is installed on a side of the battery cell strip (100) away from the heat exchange plate (200), and the side plate (400) cooperates with the end plate (300) to constrain the periphery of the battery cell strip (100) and can bear the expansion force of the battery cell strip (100); A bottom plate (500) is installed at the bottom of the battery cell strip (100), and a phase change material layer is provided on the surface of the bottom plate (500) close to the battery cell strip (100).
2. The battery cell module according to claim 1, characterized in that: The cross-sectional shape of the heat exchange plate (200) between the battery cell bars (100) is any one of an I-shaped, T-shaped, and I-shaped.
3. The battery cell module according to claim 2, characterized in that: The heat exchange plate (200) is provided with placement grooves on both sides. The heating device is an electric heating wire, which is arranged in the placement groove. The wiring end of the heating wire passes through and extends out of the end plate (300).
4. The battery cell module according to claim 2, characterized in that: Heating devices are respectively installed on both sides of the heat exchange plate (200), wherein the heating devices are electric heating films, and the connection terminals of the electric heating films pass through and extend out of the end plate (300).
5. The battery cell module according to claim 2, characterized in that: A heating channel is provided in the side wall of the heat exchange plate (200), and a heat-conducting medium is filled in the heating channel. The inlet and outlet of the heating channel respectively pass through the end plate (300).
6. The battery cell module according to claim 1, characterized in that: The end plate (300) is provided with a slot, and the heat exchange plate (200) is inserted into the slot for vertical fixation.
7. The battery cell module according to claim 5, characterized in that: A heat conducting sheet is provided on the side wall of the battery core strip (100) close to the heating flow channel.
8. The battery cell module according to claim 5, characterized in that: The heating flow channel is fin-shaped to increase the heat exchange area.