CN210074097U - Battery module and battery box - Google Patents
Battery module and battery box Download PDFInfo
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- CN210074097U CN210074097U CN201921205344.0U CN201921205344U CN210074097U CN 210074097 U CN210074097 U CN 210074097U CN 201921205344 U CN201921205344 U CN 201921205344U CN 210074097 U CN210074097 U CN 210074097U
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- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a battery module and battery box, specifically, the utility model discloses a battery module includes: the battery cell group comprises a plurality of battery cells which are arranged in parallel; the end plates are arranged at two ends of the grouped battery cells; the fastening piece is used for fastening the end plate and the grouped battery cells together; the cold drawing covers the length direction's of group electric core side to be used for with the heat transfer of group electric core. The utility model discloses a cold drawing of battery module covers in group's electric core length direction's side, and the cold drawing can cover electric core direction of height like this, carries out the heat transfer with each part of electric core direction of height, guarantees that electric core heat dissipation is more even on the direction of height, and the temperature keeps unanimous.
Description
Technical Field
The utility model relates to a secondary battery field especially relates to a battery module and battery box.
Background
With the development of new energy vehicles and energy storage technologies, power battery systems are more and more widely applied in the field of electric vehicles. The power battery mainly stores and releases electric energy through chemical reaction, and when the chemical reaction occurs, the power battery cannot generate too much heat to cause excessive temperature rise of the battery due to the fact that the temperature cannot be too low to affect the storage and release of the electric energy on the one hand, and therefore, the current battery module is maintained in a specific temperature range through a cooling system and a heating system.
Current power battery adopts to arrange the cold drawing in order to dispel the heat to electric core in the below of electric core in groups more, as shown in fig. 1, a plurality of electric cores 1 set up side by side, tie tightly 2 through the bandage after pressing from both sides dress end plate 4 at the both ends of electric core in groups, cold plate 3 has been arranged to the bottom of electric core in groups, carry out the heat transfer and take away the heat on electric core 1 through cold plate 3 and the bottom of electric core 1 to play the radiating purpose of electric core. However, for a high battery cell, the cold plate in the heat dissipation structure can not quickly take away the heat on the upper part of the battery cell, so that the temperature difference between the upper end and the lower end of the battery cell is large, and the service performance and the service life of the battery are affected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery module to solve current heat radiation structure to highly higher electric core, the inhomogeneous problem of heat dissipation. And simultaneously, the utility model also provides a battery box that includes this battery module.
The utility model discloses a battery module includes:
the battery cell group comprises a plurality of battery cells which are arranged in parallel;
the end plates are arranged at two ends of the grouped battery cells;
the fastening piece is used for fastening the end plate and the grouped battery cells together;
the cold drawing covers the length direction's of group electric core side to be used for with the heat transfer of group electric core.
The utility model discloses a cold drawing of battery module covers in group's electric core length direction's side, and the cold drawing can cover electric core direction of height like this, carries out the heat transfer with each part of electric core direction of height, guarantees that electric core heat dissipation is more even on the direction of height, and the temperature keeps unanimous.
Furthermore, the cold drawing is U-shaped, and the both sides of length direction's both sides face, the base cover end plate of U-shaped cold drawing cover respectively for two parallel edges of U-shaped cold drawing. Adopt the U-shaped cold drawing can cover two sides of electric core length direction in groups simultaneously, help electric core in groups to dispel the heat evenly in width direction's both sides, moreover, it is more convenient to adopt the U-shaped structure to assemble, compares and adopts two independent cold drawing to carry out the heat exchange to two length direction's of electric core in groups side respectively, simple structure.
Furthermore, the U-shaped cold plate is arranged in a heat insulation way with an end plate wrapped in the U-shaped cold plate, and the end plate is arranged in a heat insulation way with an adjacent cell. Thus, the end plates do not exchange heat with the battery cells and the cold plate, and the problem that the influence of the end plates on grouped battery cells causes uneven temperature distribution is avoided.
Specifically, the U-shaped cold plate is spaced from the end plate wrapped therein to achieve thermal insulation therebetween; or an insulating mat is clamped between the U-shaped cold plate and the end plate wrapped in the U-shaped cold plate to realize the heat insulation between the U-shaped cold plate and the end plate. The two heat insulation modes are simple, and the weight of the module is not increased too much.
Furthermore, the cold plate is provided with an inward flange at the edge of at least one of the two long sides, and the inward flange is blocked with the side faces of the battery cells in the up-down direction. Each electric core of being convenient for like this guarantee battery core in groups arranges neatly, the location of each electric core when being convenient for assemble.
Further, a heat conduction material is clamped between two adjacent cells of the battery cell group to promote heat transfer between the adjacent cells. Thus, temperature balance among the battery cells of the grouped battery cells is convenient to realize.
Furthermore, heat-conducting glue or heat-conducting pads are arranged between the grouped electric cores and the cold plate, so that good heat conduction between the grouped electric cores and the cold plate can be ensured.
Furthermore, the cold plate is fixedly connected to the end plate through screws, so that the cold plate is fixed reliably, and the fixed mounting mode of the cold plate is simple.
In addition, electric core in groups still presss from both sides between a plurality of electric cores of arranging side by side and is equipped with one or two above middle part baffles, and the equipartition is gone up with the end plate in the length direction of electric core in groups to middle part baffle, and middle part baffle and cold drawing and adjacent electric core all insulate against heat the setting, all are equipped with the connection structure who is used for being connected with the battery box on middle part baffle and the end plate. According to the increase of a plurality of adaptability of electric core number that electric core contained in groups and the quantity that reduces middle part baffle, can guarantee to be connected the reliability between electric core in groups and the battery box, also guaranteed electric core overall structure in groups's firm.
As a further optimization, the cold plate is connected in a heat transfer manner with a heating device, and heat generated by the heating device can be transferred to the battery cells in groups through the cold plate. Like this at external environment temperature lower, and when needs heat the battery, heating device can give the cold plate back with heat transfer, gives battery core in groups through cold plate transfer, and the intensification of battery core in groups is also more even like this, helps improving the battery performance.
Further, the heating device is a heating film adhered or vulcanized on the outer surface of the cold plate. Therefore, the heating device has large contact area with the cold plate, high heat transfer efficiency and small occupied space.
The utility model discloses a battery box includes:
a box body;
and install the battery module in the box, the battery module includes:
the battery cell group comprises a plurality of battery cells which are arranged in parallel;
the end plates are arranged at two ends of the grouped battery cells;
the fastening piece is used for fastening the end plate and the grouped battery cells together;
the cold drawing covers the length direction's of group electric core side to be used for with the heat transfer of group electric core.
The utility model discloses battery box's battery module passes through the cold drawing and covers in group's electric core length direction's side, and the cold drawing can cover electric core direction of height like this, carries out the heat transfer with each part of electric core direction of height, guarantees that electric core heat dissipation is more even on the direction of height, and the temperature keeps unanimous.
Furthermore, the cold drawing is U-shaped, and the both sides of length direction's both sides face, the base cover end plate of U-shaped cold drawing cover respectively for two parallel edges of U-shaped cold drawing. Adopt the U-shaped cold drawing can cover two sides of electric core length direction in groups simultaneously, help electric core in groups to dispel the heat evenly in width direction's both sides, moreover, it is more convenient to adopt the U-shaped structure to assemble, compares and adopts two independent cold drawing to carry out the heat exchange to two length direction's of electric core in groups side respectively, simple structure.
Furthermore, the U-shaped cold plate is arranged in a heat insulation way with an end plate wrapped in the U-shaped cold plate, and the end plate is arranged in a heat insulation way with an adjacent cell. Thus, the end plates do not exchange heat with the battery cells and the cold plate, and the problem that the influence of the end plates on grouped battery cells causes uneven temperature distribution is avoided.
Specifically, the U-shaped cold plate is spaced from the end plate wrapped therein to achieve thermal insulation therebetween; or an insulating mat is clamped between the U-shaped cold plate and the end plate wrapped in the U-shaped cold plate to realize the heat insulation between the U-shaped cold plate and the end plate. The two heat insulation modes are simple, and the weight of the module is not increased too much.
Furthermore, the cold plate is provided with an inward flange at the edge of at least one of the two long sides, and the inward flange is blocked with the side faces of the battery cells in the up-down direction. Each electric core of being convenient for like this guarantee battery core in groups arranges neatly, the location of each electric core when being convenient for assemble.
Further, a heat conduction material is clamped between two adjacent cells of the battery cell group to promote heat transfer between the adjacent cells. Thus, temperature balance among the battery cells of the grouped battery cells is convenient to realize.
Furthermore, heat-conducting glue or heat-conducting pads are arranged between the grouped electric cores and the cold plate, so that good heat conduction between the grouped electric cores and the cold plate can be ensured.
Furthermore, the cold plate is fixedly connected to the end plate through screws, so that the cold plate is fixed reliably, and the fixed mounting mode of the cold plate is simple.
In addition, electric core in groups still presss from both sides between a plurality of electric cores of arranging side by side and is equipped with one or two above middle part baffles, and the equipartition is gone up with the end plate in the length direction of electric core in groups to middle part baffle, and middle part baffle and cold drawing and adjacent electric core all insulate against heat the setting, all are equipped with the connection structure who is used for being connected with the battery box on middle part baffle and the end plate. According to the increase of a plurality of adaptability of electric core number that electric core contained in groups and the quantity that reduces middle part baffle, can guarantee to be connected the reliability between electric core in groups and the battery box, also guaranteed electric core overall structure in groups's firm.
As a further optimization, the cold plate is connected in a heat transfer manner with a heating device, and heat generated by the heating device can be transferred to the battery cells in groups through the cold plate. Like this at external environment temperature lower, and when needs heat the battery, heating device can give the cold plate back with heat transfer, gives battery core in groups through cold plate transfer, and the intensification of battery core in groups is also more even like this, helps improving the battery performance.
Further, the heating device is a heating film adhered or vulcanized on the outer surface of the cold plate. Therefore, the heating device has large contact area with the cold plate, high heat transfer efficiency and small occupied space.
Drawings
Fig. 1 is a schematic structural view of a conventional battery module;
fig. 2 is a schematic perspective view of a battery module according to the present invention;
fig. 3 is a top view of the battery module of the present invention;
fig. 4 is a cross-sectional view of the battery module of the present invention at the position of the middle separator;
fig. 5 is an enlarged view of a portion a in fig. 4.
In fig. 1: 1-electric core; 2-binding band; 3-a cold plate; 4-end plate.
In FIGS. 2-5: 1-electric core; 2-binding band; 30-a cold plate; 31-inward flanging; 300-insulating interval; 301-liquid inlet; 302-a liquid outlet; 4-an end plate; 40-a middle separator; 7-a heat insulation mat; 9-connecting hole.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
The utility model discloses a concrete embodiment of battery box, including battery box and the battery module of fixed mounting in the battery box. Wherein the structure of the battery module is shown in fig. 2-5. Specifically, as shown in fig. 2-3, the battery module includes a group of electric cores, the group of electric cores has a plurality of electric cores 1 arranged side by side in the thickness direction, the two ends of the group of electric cores are respectively provided with an end plate 4, the two end plates 4 clamp the plurality of electric cores 1 in the middle, and tie tightly through a binding band 2. The end plate 4 is provided with a connecting hole 9 extending along the height direction, and the battery module is fixedly connected in the battery box through a connecting screw penetrating in the connecting hole 9. In this embodiment, the electric core number that electric core contained in groups is more, in order to guarantee reliability and the steadiness of being connected between battery module and the battery box, electric core in groups still is provided with middle part baffle 40 at length direction's intermediate position, and middle part baffle 40 presss from both sides and presss from both sides between two electric cores 1, and is equipped with the connecting hole 9 that runs through along the direction of height equally on it, is connected with the battery box through wearing the connecting screw of dress in connecting hole 9.
Of course, in other embodiments, if the number of the battery cells included in the battery cell group is large, two or three middle partition plates may be provided to increase the fixed point positions between the battery cells in the battery cell group and the battery box body; if the number of the battery cells contained in the battery cells is small, the middle partition plate also can not be arranged, the specific condition can be set according to the actual requirement, and the specific limitation is not made here.
In each electric core that contains in groups electric core, press from both sides between two adjacent electric cores and be equipped with the heat conduction material such as high heat conduction graphite pad to guarantee good heat transfer effect between two adjacent electric cores. Heat insulation pads are clamped between the middle partition plate and the adjacent electric core and between the end plate and the adjacent electric core, so that the heat of the electric core can not be transmitted to the middle partition plate and the end plate, and the heat transmission of the electric core to the box body is also avoided.
The battery module still includes cold drawing 30, and cold drawing 30 is the U-shaped, and the two parallel sides of U-shaped cold drawing cover respectively in the length direction's of electric core in groups side, and the diapire of U-shaped cold drawing covers in the end plate position department of electric core one end in groups, and the tip on the two parallel sides of U-shaped cold drawing is provided with inlet 301 and liquid outlet 302 respectively to realize the circulation of the inside liquid cooling medium of cold drawing 30. Wherein, heat conduction materials such as heat conduction glue and heat conduction pads are arranged between the cold plate 30 and the side surfaces of the electric cores 1 of the group of electric cores to ensure good heat transfer between the cold plate and the electric cores; heat insulation pads are clamped between the cold plate 30 and the end part 4 and two side surfaces of the middle partition plate 40 in the width direction, and a heat insulation interval 300 is reserved between the bottom edge of the cold plate 30 and the end plate 4 wrapped inside the cold plate, so that heat insulation among the middle partition plate, the end plate and the cold plate is realized. Make electric core only and carry out the heat exchange between the cold drawing like this, middle part baffle and end plate do not participate in the heat transfer, can take more heat out of battery box through the cold drawing, have also avoided middle part baffle and end plate to the influence of the temperature of adjacent electric core moreover, guarantee the unanimity of each electric core temperature more easily.
The U-shaped cold plates are fixed on two sides of the end plates and the middle partition plates in the width direction through screws, and the overall stability is guaranteed. Of course, in other embodiments, the cold plate may also be bonded to the grouped cells by structural adhesive to achieve fixation, or the cold plate may be fastened to the grouped cells only by a binding band.
In addition, the two long edges of the U-shaped cold plate are also provided with inner flanges 31 at the upper side edge positions, and after the assembly is completed, the inner flanges 31 are blocked with the upper side surfaces of the battery cells 1 of the grouped battery cells, so that the battery cells are conveniently and orderly arranged during the assembly, and the movement of the battery cells in the vertical direction can be limited. Of course, in other embodiments, the U-shaped cold plate may be provided with inner flanges at the lower edge positions on both long sides, or with inner flanges at both upper and lower edge positions. In this embodiment, the inner flanges 31 are long strips extending along the long sides of the U-shaped cold plate, and in other embodiments, the inner flanges may also be multiple ones arranged at intervals, and each inner flange corresponds to each electric core.
As a more optimized scheme, the cold plate can be designed into various structural forms such as a section cold plate, a stamping brazing cold plate and the like according to requirements, the liquid inlet and the liquid outlet can be designed on one edge of the U-shaped cold plate or respectively arranged on two parallel edges according to temperature uniformity and a flow, and the cold plate can be provided with structures such as lightening holes or lightening grooves and the like at positions without flow channels for lightening. The cold drawing can bond together with some or all of the battery cores in groups by using materials such as structural adhesive or heat-conducting structural adhesive as required, and the adjacent two battery cores in groups can also be bonded by using the structural adhesive.
In addition, the surface of cold plate still lays (bonds or directly vulcanizes) heating film (not shown in the figure), when external ambient temperature is lower, can be to cold plate rapid heating through the heating film to the realization has guaranteed the performance of battery to the even intensification of battery core in groups.
The battery module in the battery box can uniformly exchange heat with each part in the height direction of the battery cells through the cold plate arranged on the side surface of the grouped battery cells, thereby ensuring the temperature of the battery cells in the height direction to be controlled consistently, ensuring the good heat dissipation performance of the grouped battery cells, and improving the service performance and service life of the battery box; the heating film is laid on the outer surface of the cold plate, so that when the battery is required to be heated, the temperature of the battery can be rapidly and uniformly increased, and finally the temperature of the battery is conveniently controlled.
Of course, the battery box of the present invention is not limited to the above embodiment.
For example, in other embodiments, the cold plate may also be two independent cold plates, where the two cold plates are respectively disposed on two side surfaces of the grouped battery cells in the width direction, and at this time, it is necessary that each cold plate is correspondingly provided with a liquid inlet and outlet. The cold drawing also can with the equal thermal contact of electric core in groups, end plate and middle part baffle, carry out the heat transfer with the three simultaneously. The cold plate can also be provided with no inward flanging at the long edge, and the relative position between the cold plate and the grouped electric cores is ensured by the adhesion relation between the cold plate and the grouped electric cores. The side of each electric core of the battery cores in a group is relatively flat, when two adjacent electric cores are attached to each other, the contact is relatively good, and a heat conduction pad and heat conduction glue do not need to be arranged between the two adjacent electric cores.
Or in other embodiments, the heating device may also adopt other structures, such as an electric heating tube or a resistance wire, and at this time, the heating portion of the heating device is in contact with the cold plate, so that heat exchange can be well performed between the heating portion and the cold plate.
The utility model discloses an embodiment of battery module: the specific structure of the battery module is the same as that of the battery module in the above-mentioned embodiment of the battery box, and the details are not repeated here.
Claims (12)
1. A battery module, characterized by includes:
the battery cell group comprises a plurality of battery cells which are arranged in parallel;
the end plates are arranged at two ends of the grouped battery cells;
the fastening piece is used for fastening the end plate and the grouped battery cells together;
the cold drawing covers the length direction's of group electric core side to be used for with the heat transfer of group electric core.
2. The battery module of claim 1, wherein the cold plate is U-shaped, two parallel sides of the U-shaped cold plate respectively cover two lengthwise sides of the grouped cells, and a bottom side of the U-shaped cold plate covers the end plate.
3. The battery module of claim 2, wherein the U-shaped cold plate is thermally isolated from the end plates wrapped therein, the end plates being thermally isolated from adjacent cells.
4. The battery module of claim 3, wherein the U-shaped cold plate is spaced apart from the end plate wrapped therein to provide thermal isolation therebetween; or an insulating mat is clamped between the U-shaped cold plate and the end plate wrapped in the U-shaped cold plate to realize the heat insulation between the U-shaped cold plate and the end plate.
5. The battery module according to any one of claims 1 to 4, wherein the cold plate is provided with an inward flange at an edge of at least one of the two long sides thereof, and the inward flange is blocked with the side surfaces of the grouped cells in the up-down direction.
6. The battery module of any of claims 1-4, wherein a thermally conductive material is sandwiched between two adjacent cells of the plurality of cells to facilitate heat transfer between the adjacent cells.
7. The battery module according to any one of claims 1 to 4, wherein a thermally conductive adhesive or a thermally conductive pad is disposed between the grouped cells and the cold plate.
8. The battery module according to any one of claims 1 to 4, wherein the cold plate is fixedly coupled to the end plate by screws.
9. The battery module according to any one of claims 1 to 4, wherein one or more middle partition plates are further interposed between the plurality of cells arranged in parallel in the group of cells, the middle partition plates and the end plates are uniformly distributed in the length direction of the group of cells, the middle partition plates, the cold plate and the adjacent cells are arranged in a heat-insulating manner, and the middle partition plates and the end plates are provided with connecting structures for connecting with the battery box.
10. The battery module according to any one of claims 1 to 4, wherein the cold plate is in heat transfer connection with a heating device, and heat generated by the heating device can be transferred to the battery cells through the cold plate.
11. The battery module according to claim 10, wherein the heating means is a heating film adhered or vulcanized on the outer surface of the cold plate.
12. A battery box, characterized by comprising:
a box body;
and the battery module according to any one of claims 1 to 11 mounted in the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205344.0U CN210074097U (en) | 2019-07-29 | 2019-07-29 | Battery module and battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205344.0U CN210074097U (en) | 2019-07-29 | 2019-07-29 | Battery module and battery box |
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| Publication Number | Publication Date |
|---|---|
| CN210074097U true CN210074097U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921205344.0U Active CN210074097U (en) | 2019-07-29 | 2019-07-29 | Battery module and battery box |
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| CN (1) | CN210074097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310535A (en) * | 2020-07-31 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Battery pack, electric device, and method for manufacturing battery pack |
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2019
- 2019-07-29 CN CN201921205344.0U patent/CN210074097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310535A (en) * | 2020-07-31 | 2021-02-02 | 宁德时代新能源科技股份有限公司 | Battery pack, electric device, and method for manufacturing battery pack |
| CN112310535B (en) * | 2020-07-31 | 2023-11-21 | 宁德时代新能源科技股份有限公司 | Battery pack, power consumption device, and method for manufacturing battery pack |
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