New energy battery for heavy truck

Abstract

The utility model provides a new energy battery for a heavy truck, the new energy battery comprises a battery cell module, a battery management system and a shell, the shell comprises a bottom plate, the middle part of the upper surface of the bottom plate is connected with and bears the battery cell module through a heat-conducting glue layer; the supporting piece is arranged on the upper surface of the bottom plate and extends in the width direction of the bottom plate, and the supporting piece is connected with a battery management system; the box cover is formed into a groove body with a first opening in the bottom, the box cover can contain the battery cell module, the battery management system and the supporting piece, an outer flange is arranged at the edge of the first opening of the box cover, a lining is embedded into the bottom of the outer flange, and a first fastener penetrates through the outer flange and the lining to be fixedly connected with the bottom plate; a second opening is formed in the side wall of the front side of the box cover; and the end cover is connected to the front side of the box cover through a second fastener. According to the new energy battery, the risk of thermal runaway of the new energy battery can be reduced, and the new energy battery is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and more specifically, to a new energy battery for heavy trucks. Background Art

[0002] New energy batteries are being used more and more widely in heavy trucks.

[0003] New energy batteries are large in size, and heavy trucks travel on bumpy roads, which can easily lead to failure of the new energy batteries. In addition, the outer shells of existing new energy batteries are usually sealed by welding, which makes it difficult to disassemble them for maintenance. Utility Model Content

[0004] The utility model provides a new technical solution for new energy batteries for heavy trucks, which can at least solve the problem in the prior art that new energy batteries are prone to failure and difficult to repair.

[0005] According to the present utility model, a new energy battery for heavy trucks is provided, wherein the new energy battery comprises a cell module, a battery management system and a housing, wherein the housing comprises:

[0006] A bottom plate, the middle portion of the upper surface of which is connected to and supports the battery module via a thermally conductive adhesive layer;

[0007] A support member, the support member is provided on the upper surface of the base plate and extends along the width direction of the base plate, the support member is located on the front side of the battery module, and the support member is connected to the battery management system;

[0008] A box cover is formed as a trough with a first opening at the bottom. The box cover can accommodate the battery module, the battery management system and the support member. The bottom of the outer flange is embedded in a bushing. A first fastener passes through the outer flange and the bushing and is fastened to the bottom plate. A second opening is formed on the side wall of the front side of the box cover.

[0009] An end cover is connected to the front side of the box cover through a second fastener to close the second opening.

[0010] Furthermore, the support member includes:

[0011] a first supporting step connected to an upper surface of the base plate;

[0012] A support plate is connected to the upper surface of the first support step, a side surface of the support plate is connected to the battery management system, and the second fastener passes through the end cover and the box cover and is fastened to the support plate.

[0013] Further, the first fastener is a bolt, a first threaded hole is formed on the bottom plate, and the first fastener is screwed through the outer flange, the bushing, and the sealing ring, and is screwed with the first threaded hole.

[0014] Further, the shell further comprises:

[0015] a first sealing ring, the first sealing ring is arranged between the outer flange and the bottom plate, and the first fastener is screwed through the outer flange, the bushing, and the sealing ring, and is screwed with the first threaded hole.

[0016] Further, the battery cell module further comprises:

[0017] a plurality of battery cells, the plurality of battery cells are arranged in a first direction and are spaced apart from each other;

[0018] two aluminum end plates, the two aluminum end plates are respectively arranged outside a first battery cell and a last battery cell in the plurality of battery cells arranged in the first direction, the outside of the battery cell being a side of the battery cell away from an adjacent battery cell;

[0019] a plurality of first fire-retardant plates, the plurality of first fire-retardant plates are respectively inserted into a gap between every two adjacent battery cells and a gap between the aluminum end plate and the battery cell;

[0020] a cable tie, the cable tie is wrapped around and binds the plurality of battery cells, the plurality of first fire-retardant plates, and the two aluminum end plates;

[0021] a busbar, the busbar is arranged on top of the plurality of battery cells and is electrically connected to all the battery cells;

[0022] a positive electrode connector, the positive electrode connector is connected to a positive electrode of the battery cell;

[0023] a negative electrode connector, the negative electrode connector is connected to a negative electrode of the battery cell.

[0024] Further, the battery cell module further comprises:

[0025] an insulating plate, the insulating plate is arranged on top of the busbar.

[0026] Further, the new energy battery further comprises:

[0027] a plurality of battery cell modules, the plurality of battery cell modules are arranged in a second direction and are spaced apart from each other, and there is a predetermined gap between adjacent battery cell modules, the second direction being a horizontal direction perpendicular to the first direction, and the battery cell module being any one of the battery cell modules of claims 1 to 19;

[0028] A connecting flat cable is connected in series to a plurality of the battery cell modules, and connects the positive electrode connector and the negative electrode connector, and the battery cell is connected to the positive electrode connector through the connecting flat cable and connected to the negative electrode connector through the connecting flat cable.

[0029] Further, the new energy battery further comprises:

[0030] A second support step is arranged between the bottom plate and the aluminum end plate.

[0031] Further, the bottom plate comprises:

[0032] A substrate is internally formed with a plurality of strip-shaped flow channels capable of containing cooling liquid, and a plurality of the flow channels are distributed along the width or length direction of the substrate, and the upper surface of the substrate is used to connect the battery cell module through a thermally conductive adhesive layer.

[0033] Two side end plates are connected on both sides of the length direction or width direction of the substrate and connect the end of the length direction of the flow channel, and one side of one of the side end plates away from the substrate is formed with an inlet hole and an outlet hole communicating with the flow channel.

[0034] Further, a plurality of the flow channels are distributed along the width direction of the substrate, and the flow channels also comprise a plurality of groups, the flow channels in each group are internally communicated with each other, the flow channels in different groups are not communicated, a plurality of the flow channels and a plurality of the battery cell modules correspond one by one, and each group of the flow channels is communicated with the inlet hole and the outlet hole.

[0035] The new energy battery for heavy trucks according to the utility model, the bottom plate supports the battery cell module, the support is arranged on the bottom plate to support the battery management system, the box cover contains the battery cell module, the battery management system and the support, the box cover is detachably connected with the bottom plate through the first fastener, and the end cover is detachably closed at the front end of the box cover through the second fastener. The support is connected with the battery management system, so that the position of the battery management system is stable, direct connection between the battery management system and the battery cell module is avoided, and the following situations are avoided: the battery cell module and the battery management system are separated due to bumping of the heavy truck during driving, the electrical connection between the battery cell module and the battery management system is disconnected, local heat of the battery cell module is not sufficiently dissipated due to coverage of the battery management system, and the battery cell module and the battery management system are out of control. When the battery management system itself has a problem or the battery management system and the battery cell module have a connection problem, the fastener is loosened, so that the end cover and the box cover are separated, relevant personnel can maintain the battery management system at the second opening, and the maintenance time and cost are reduced.

[0036] Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0038] Figure 1 is a structural diagram of a new energy battery according to the first embodiment of the present application;

[0039] Figure 2 is Figure 1 a structural diagram of a new energy battery of the embodiment without a box cover;

[0040] Figure 3 is Figure 1 an exploded view of a new energy battery of the embodiment;

[0041] Figure 4 is a structural diagram of a support plate and a battery management system according to an embodiment of the present application;

[0042] Figure 5 is a structural diagram of a battery cell module according to an embodiment of the present application;

[0043] Figure 6 is a structural diagram of a battery cell module according to Figure 5 the first embodiment;

[0044] Figure 7 is a structural diagram of an insulation plate according to an embodiment of the present application;

[0045] Figure 8 is a partial view of a new energy battery according to the second embodiment of the present application;

[0046] Figure 9 is Figure 8 a structural diagram of a new energy battery of the embodiment without an insulation plate;

[0047] Figure 10 is Figure 9 a structural diagram of a new energy battery of the embodiment from another perspective;

[0048] Figure 11 is Figure 10 an enlarged view of area A in the middle;

[0049] Figure 12 is Figure 1 is a bottom plate structural diagram according to an embodiment of the present application;

[0050] Figure 13is a cross-sectional view of a base plate according to a first embodiment of the present utility model;

[0051] Figure 14 is a cross-sectional view of a bottom plate according to a second embodiment of the present utility model;

[0052] Figure 15 4 is a cross-sectional view of a bottom plate according to a third embodiment of the present invention.

[0053] Reference numerals:

[0054] 10. Bottom plate; 11. Side end plate; 111. Liquid inlet; 112. Liquid outlet; 113. First connecting channel; 114. Second connecting channel; 12. Base plate; 123. Flow channel; 13. Liquid inlet connector; 14. Liquid outlet connector;

[0055] 20. Box cover;

[0056] 30. End cap;

[0057] 40. Rings;

[0058] 50. Cell module; 51. Cell; 52. First flame-retardant plate; 53. Aluminum end plate; 54. Insulation plate; 541. Depression; 55. Cable tie; 56. Busbar; 561. Protrusion; 57. Connector; 581. Positive connector; 582. Negative connector.

[0059] 61, support plate; 611, front plate; 612, folding plate; 613, rear plate; 62, first support step; 63, second support step;

[0060] 70. Battery management system;

[0061] 81. First sealing ring; 82. Second sealing ring;

[0062] 91. First row of wires; 92. Second row of wires; 931. Connecting column; 932. Connecting bolt. DETAILED DESCRIPTION

[0063] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0064] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0065] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0066] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0067] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0068] The energy battery for heavy trucks according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0069] like Figures 1 to 15 As shown, according to an embodiment of the present invention, a new energy battery for a heavy-duty card slot includes a battery cell module 50, a battery management system 70 and a casing.

[0070] The battery module 50 can provide power. The battery management system can monitor and manage the battery module 50. The housing protects the battery module 50 and the battery management system 70.

[0071] The housing of a battery for a heavy truck according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0072] like Figures 1 to 4 FIG. 1 shows a housing according to an embodiment of the present invention. The housing comprises a bottom plate 10 , a support member, a box cover 20 and an end cover 30 .

[0073] First, the bottom plate 10 is described. The battery cell module 50 is supported in the middle of the upper surface of the bottom plate 10 .

[0074] The base plate 10 can stably support the battery cell module 50 so that the battery cell module 50 operates normally. The battery cell module 50 can also dissipate heat through the base plate 10 to reduce the probability of thermal runaway.

[0075] Next, the support member is described. The support member is provided on the upper surface of the base plate 10 and extends along the width direction of the base plate 10. When the base plate 10 carries the battery module 50, the support member is located in front of the battery module 50 and is connected to the battery management system 70.

[0076] Connecting the battery management system 70 through the support member can stabilize the position of the battery management system 70, avoid direct connection between the battery management system 70 and the battery cell module 50, which may cause the battery cell module 50 and the battery management system 70 to separate due to the bumps during the driving of the heavy truck, resulting in disconnection of the electrical connection between the battery cell module 50 and the battery management system 70, and insufficient heat dissipation of the local heat of the battery cell module 50 due to the coverage of the battery management system 70, resulting in thermal runaway of the battery cell module 50 and the battery management system 70.

[0077] Next, the box cover 20 is described. The box cover 20 is formed as a trough with a first opening at the bottom. The box cover 20 accommodates the battery module 50, the battery management system 70, and the support member. The box cover 20 is provided with an outer flange 22 at the edge of the first opening. The bottom of the outer flange 22 is embedded in a bushing. A first fastener passes through the outer flange 22 and the bushing and is fastened to the base plate 10. A second opening 21 is formed on the side wall of the front side of the box cover 20.

[0078] A cavity can be formed by the box cover 20 and the bottom plate 10, and the battery module 50, the battery management system 70 and the support can be accommodated in the cavity, so as to better protect the battery module 50, the battery management system 70 and the support.

[0079] The first fastener passes through the outer flange 22 and the bushing of the box cover 20 and is fastened to the bottom plate 10, so that the connection between the cover and the bottom plate 10 is stable and easy to disassemble. The first fastener can be a bolt, a rivet, an expansion screw, etc.

[0080] The outer flange 22 can be welded to the edge of the trough body adjacent to the first opening.

[0081] The bushing can increase the tightness of the connection between the outer flange 22 and the base plate 10 and improve the sealing performance.

[0082] Finally, the end cover 30 is described. The end cover 30 is connected to the front side of the box cover 20 by a second fastener to close the second opening 21. The first fastener can be a bolt, a rivet, an expansion screw, etc.

[0083] If there is a problem with the battery management system 70 itself, or a connection problem occurs between the battery management system 70 and the battery cell module 50, loosening the fasteners can separate the end cover 30 and the box cover 20, making it easier for relevant personnel to repair the battery management system 70 at the second opening 21, thereby reducing repair time and costs.

[0084] In the above-mentioned battery housing for heavy-duty trucks, the base plate 10 supports the battery module 50, the support member is arranged on the base plate 10 to support the battery management system 70, the box cover 20 accommodates the battery module 50, the battery management system 70 and the support member, the box cover 20 is detachably connected to the base plate 10 by a first fastener, and the end cover 30 is detachably closed at the front end of the box cover 20 by a second fastener. Connecting the battery management system 70 by the support member can stabilize the position of the battery management system 70, avoid the direct connection between the battery management system 70 and the battery module 50, which may cause the battery module 50 and the battery management system 70 to separate due to the bumps during the driving of the heavy truck, and avoid the electrical connection between the battery module 50 and the battery management system 70 being disconnected, and the local heat of the battery module 50 is not sufficiently dissipated due to the coverage of the battery management system 70, resulting in thermal runaway of the battery module 50 and the battery management system 70. If there is a problem with the battery management system 70 itself, or a connection problem occurs between the battery management system 70 and the battery cell module 50, loosening the fasteners can separate the end cover 30 and the box cover 20. Relevant personnel can repair the battery management system 70 at the second opening, which can reduce repair time and repair costs.

[0085] In some embodiments of the present invention, the support member includes a first support step 62 and a support plate 61. The first support step 62 is connected to the upper surface of the base plate 10. The support plate 61 is connected to the upper surface of the first support step 62. The side of the support plate 61 is connected to the battery management system 70. The second fastener passes through the end cap 30 and the box cover 20 and is fastened to the support plate 61.

[0086] The support member is connected to the bottom plate 10 via the first support step 62. The support plate 61 is connected to the battery management system 70, which can increase the contact area with the battery management system 70 and provide the battery management system 70 with more stable support.

[0087] The support member is connected to the bottom plate 10 via the first support step 62. The support plate 61 is connected to the battery management system 70, which can increase the contact area with the battery management system 70 and provide the battery management system 70 with more stable support.

[0088] The first supporting step 62 can be connected to the bottom plate 10 by welding, so that the first supporting step 62 and the bottom plate 10 are firmly connected.

[0089] Furthermore, the support plate 61 includes a front plate 611, a hemming plate 612, and a rear plate 613. A third opening is formed in the middle of the front plate 611, and the support plate 61 is connected to the second fastener through the edge of the front plate 611. The hemming plate 612 is at least vertically connected to the outer edge of the bottom of the front plate 611 and extends backward. The hemming plate 612 located at the bottom is used to connect to the bottom of the battery management system 70. The rear plate 613 is vertically connected to the rear end of the hemming plate 612 located at the bottom and extends upward. The front surface of the rear plate 613 is used to connect to the rear of the battery management system 70. The hemming plate 612 can be vertically connected only to the outer edge of the bottom of the front plate 611, or it can be vertically connected to the outer edge of the side of the front plate 611.

[0090] like Figure 4 As shown, the support plate 61 includes a front plate 611, a hem plate 612, and a rear plate 613. The front plate 611, hem plate 612, and rear plate 613 provide stable support for the battery management system 70 while being lightweight. The rear plate 613 is located between the battery management system 70 and the cell module 50 to prevent the cell module 50 from squeezing the battery management system 70.

[0091] In some embodiments of the present invention, the first supporting step 62 is formed as a first square tube, and the included angle between the outer sides of adjacent side surfaces of the first square tube is an arc angle.

[0092] like Figure 2 As shown, the first square tube is located between the bottom plate 10 and the support member. The square tube has high structural strength and light weight, and can provide better support for the support plate 61.

[0093] The included angle between the outer sides of the adjacent side surfaces of the first square tube is an arc angle. When the first square tube is welded to the base plate, the solder accumulates at this arc angle, thereby avoiding the situation in which, when welding conventional right-angled square tubes, the solder accumulates at the position where the right-angled square tube faces the battery cell module 50 and causes interference with the battery cell module 50.

[0094] In some embodiments of the present invention, the first fastener is a bolt. A first threaded hole is formed on the base plate 10 . The first fastener passes through the outer flange 22 and the bushing and is threadedly connected to the first threaded hole.

[0095] The box cover 20 can be easily and securely connected to the base plate 10 by means of screws.

[0096] Furthermore, the housing further includes a first sealing ring 81 . The first sealing ring 81 is disposed between the outer flange 22 and the bottom plate 10 . The first fastener passes through the outer flange 22 , the bushing and the first sealing ring 81 , and is threadedly connected to the first threaded hole of the bottom plate 10 .

[0097] like Figures 1 to 3As shown, the first sealing ring 81 can increase the airtightness between the box cover 20 and the bottom plate 10 and improve the waterproof level, thereby preventing the heavy truck from easily leaking water under complex and harsh driving conditions.

[0098] Furthermore, the first sealing ring 81 is made of silicone.

[0099] A silicone member (a silicone material member, such as a foamed silicone member) as the first sealing ring 81 can improve the sealing performance between the box cover 20 and the bottom plate 10. The silicone material member is relatively soft and has a long life, which can increase the sealing performance and service life of the first sealing ring 81.

[0100] In some embodiments of the present invention, the housing further comprises a second sealing ring 82 . The second sealing ring 82 is disposed between the end cover 30 and the box cover 20 , and the second fastener passes through the end cover 30 and the second sealing ring 82 and is connected to the box cover 20 .

[0101] like Figures 1 to 3 As shown, the second sealing ring 82 can enhance the airtightness between the end cover 30 and the box cover 20, improve the waterproof level, and prevent the heavy truck from easily leaking water when driving in complex and harsh conditions. The second sealing ring 82 can also be a non-metallic sealing ring (such as a silicone sealing ring).

[0102] In some embodiments of the present invention, the housing further comprises a plurality of hanging rings 40. The plurality of hanging rings 40 are connected to the upper surface of the bottom plate 10 and are arranged along the outer edge of the bottom plate 10 at intervals.

[0103] like Figure 1 As shown, four lifting rings 40 are provided on the base plate 10. The lifting rings 40 can be used to conveniently lift the new energy battery, thereby facilitating the installation and removal of the new energy battery.

[0104] In some embodiments of the present invention, a chamber capable of accommodating the cooling liquid is formed in the middle of the bottom plate 10, and a liquid inlet and a liquid outlet communicating with the chamber are formed at the ends of the bottom plate 10.

[0105] like Figure 2 and Figure 3 As shown, the coolant can enter the chamber from the liquid inlet and then flow out from the liquid outlet, thereby forming a liquid cooling system that can efficiently dissipate heat from the battery cell module 50. The integrated design of the base plate 10 and the liquid cooling system is conducive to improving space utilization, reducing the number of parts, simplifying the assembly process, reducing costs, and increasing the energy density of the battery cell module 50.

[0106] The battery cell module 50 according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0107] like Figures 5 to 11As shown, the battery cell module 50 according to the present invention includes multiple battery cells 51, two aluminum end plates 53, multiple first flame retardant plates 52, cable ties 55, busbars 56, a positive connector 581 and a negative connector 582.

[0108] First, let's describe the battery cells 51 and the two aluminum end plates 53. The multiple battery cells 51 are spaced apart and arranged along a first direction. The two aluminum end plates 53 are located outside the first and last battery cells 51, respectively, of the multiple battery cells 51 arranged along the first direction. The outside of a battery cell 51 is the side of the battery cell 51 facing away from adjacent battery cells 51.

[0109] like Figure 5 As shown, multiple battery cells 51 are spaced apart and arranged along a first direction, with gaps between them. Two aluminum end plates 53 are located on the outside of the first and last battery cells 51 of the multiple battery cells 51, respectively. The battery cells 51 can provide electrical energy for use in heavy trucks. The aluminum end plates 53 can provide a buffer for the battery cells 51 to prevent direct external pressure on the battery cells 51, which may cause damage to the battery cells 51. In addition, the aluminum end plates 53 are flame retardant, reducing the risk of thermal runaway of new energy batteries.

[0110] Next, the first flame retardant plates 52 are described. The first flame retardant plates 52 are respectively inserted into the gaps between two adjacent battery cells 51 and into the gaps between the aluminum end plates 53 and the battery cells 51 .

[0111] like Figure 5 As shown, the first flame retardant plate 52 is arranged between adjacent battery cells 51, and between the aluminum end plate 53 and the battery cell 51, which can reduce the extrusion between adjacent battery cells 51 and between the aluminum end plate 53 and the battery cell 51 caused by the vibration of the new energy battery, and further reduce the risk of thermal runaway. Even if a local battery cell 51 fails, the first flame retardant plate 52 can prevent the faulty battery cell 51 from continuing to burn, thereby improving safety.

[0112] Next, the cable tie 55 will be described. The cable tie 55 surrounds and bundles the plurality of battery cells 51, the plurality of first flame retardant plates 52, and the two aluminum end plates 53.

[0113] like Figure 5 As shown, all the battery cells 51 , two aluminum end plates 53 and all the first flame-retardant plates 52 can be bundled together by the cable tie 55 , thereby forming a relatively independent whole and reducing the occupied space.

[0114] Finally, let's discuss the busbar 56, positive connector 581, and negative connector 582. The busbar 56 is installed on top of the battery cells 51 and electrically connects all of them. The positive connector 581 connects to the positive terminal of the battery cell 51. The negative connector 582 connects to the negative terminal of the battery cell 51.

[0115] like Figure 6 As shown, the electrodes of each of the plurality of battery cells 51 are connected by the busbar 56, thereby forming a circuit path. The positive electrode connector 581 of the battery cell 51 is convenient for connecting the positive electrode of the external charging component or power component. The negative electrode connector 582 of the battery cell 51 is convenient for connecting the negative electrode of the external charging component or power component. The positive electrode connector 581 and the negative electrode connector 582 can be connected to the busbar 56 of a single battery cell module 50, or can be connected to the battery cells 51 of the first battery cell module 50 and the last battery cell module 50 in the plurality of series-connected battery cell modules 50, respectively. Figure 4 As shown, the positive electrode connector 581 and the negative electrode connector 582 are respectively connected to the battery cells 51 of the first battery cell module 50 and the last battery cell module 50 in the plurality of series-connected battery cell modules 50.

[0116] The above battery cell module 50 for heavy trucks, a plurality of battery cells 51 are arranged in a first direction, and two aluminum end plates 53 are respectively arranged outside two battery cells 51 at two ends of the plurality of battery cells 51. The aluminum end plate 53 can provide a buffer for the battery cell 51 to avoid the battery cell 51 being damaged due to direct extrusion from the outside, and the aluminum end plate 53 can block fire to reduce the risk of thermal runaway of the new energy battery. A plurality of first fireproof plates 52 are arranged between adjacent battery cells 51 and between the battery cell 51 and the aluminum end plate 53. The first fireproof plate 52 can reduce the extrusion between adjacent battery cells 51 and the extrusion between the aluminum end plate 53 and the battery cell 51 caused by the vibration of the new energy battery, and further reduce the risk of thermal runaway. Even if a local battery cell 51 fails, the first fireproof plate 52 can prevent the failed battery cell 51 from burning, thereby improving safety. The cable tie 55 binds all the battery cells 51, the two aluminum end plates 53 and all the first fireproof plates 52, thereby forming a relatively independent whole and reducing the occupied space. The electrodes of each of the plurality of battery cells 51 are connected by the busbar 56, thereby forming a circuit path. The positive electrode connector 581 of the battery cell 51 is convenient for connecting the positive electrode of the external charging component or power component. The negative electrode connector 582 of the battery cell 51 is convenient for connecting the negative electrode of the external charging component or power component. Thus, the risk of thermal runaway of the new energy battery can be reduced, the safety is high, and the occupied space is small.

[0117] In some embodiments of the present application, the new power battery further comprises a second support step 63. The second support step 63 is arranged between the bottom plate 10 and the aluminum end plate 53.

[0118] The second support step 63 can stably support the aluminum end plate.

[0119] The second support step 63 can be the same as the first support step 62 in structure, that is, the same first square tube, thereby reducing the number of mold opening times and reducing costs.

[0120] In some embodiments of the present application, the battery cell module 50 further comprises an insulating plate 54. The insulating plate 54 covers the top of the busbar 56.

[0121] like Figure 5 and Figure 6 As shown, an insulating plate 54 is covered on the top of the busbar 56. The insulating plate 54 can reduce external interference with the busbar 56 and protect the busbar 56.

[0122] Furthermore, the busbar 56 is formed with a plurality of protrusions 561, with first through-holes formed at the tops of the protrusions 561. The insulating plate 54 is formed with a plurality of recesses 541 corresponding one-to-one with the protrusions 561, with second through-holes formed at the bottoms of the recesses 541. Multiple snap-in connectors 57 are inserted into the second through-holes and the first through-holes in a one-to-one correspondence, and snap-in with the protrusions 561, thereby tightly connecting the insulating plate 54 to the busbar 56.

[0123] Among them, the busbar can be formed by hot pressing (using the hot pressing film process to integrate the aluminum busbar and the flexible circuit board in the busbar), which can reduce costs, increase the stability of circuit connections, and reduce external interference.

[0124] like Figures 5 to 7 As shown, the clamping connector 57 is inserted into the second through-hole in the recess 541 of the insulating plate 54 and the first through-hole of the protrusion 561 of the busbar 56, and is clamped to the protrusion 561 (the bottom end of the clamping connector 57 is thicker and the middle portion is thinner. The bottom end of the clamping connector 57 passes through the first and second through-holes, and the top and bottom ends of the clamping connector 57 are pressed against the top of the protrusion 561 and the bottom of the recess 541). This ensures a tight and stable connection between the insulating plate 54 and the busbar 56, reducing the height of the battery cell module 50 and the space it occupies.

[0125] In some embodiments of the present invention, the battery cell module 50 further includes a second flame retardant plate. The second flame retardant plate is disposed on both sides of the battery cell 51 perpendicular to the first direction.

[0126] The second flame retardant plate can further reduce the risk of thermal runaway combustion of the battery cell 51 and increase safety.

[0127] The new energy battery according to the embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0128] like Figures 8 to 11 As shown, the new energy battery according to an embodiment of the present invention includes a plurality of battery cell modules 50 .

[0129] The new energy battery according to the present invention includes a plurality of battery modules 50. The plurality of battery modules 50 are spaced apart and arranged along a second direction with a predetermined gap between adjacent battery modules 50. The second direction is a horizontal direction perpendicular to the first direction.

[0130] There is a predetermined gap between the battery cell modules 50, which can leave enough thermal runaway gas discharge channels to directly reach the explosion-proof valve, thereby enhancing the discharge efficiency of the thermal runaway gas and reducing the risk of thermal runaway.

[0131] Since the battery cell module 50 according to the embodiment of the present invention has the above-mentioned technical effects, the new energy battery according to the embodiment of the present invention also has corresponding technical effects.

[0132] In some embodiments of the present invention, the new energy battery further includes a connecting cable that connects the multiple cell modules 50 in series and connects the positive connector 581 and the negative connector 582 . The cell 51 is connected to the positive connector 581 via the connecting cable and to the negative connector 582 via the connecting cable.

[0133] like Figures 8 to 10 As shown, the battery modules 50 can be easily connected in series by connecting the wiring, and the positive connector 581 and the negative connector 582 can be easily connected.

[0134] Furthermore, the connecting cables include a first cable 91 and a second cable 92. The first end of the first cable 91 is connected to the battery cell 51 in one of the battery modules 50. The first end of the second cable 92 is connected to the second end of the first cable 91, and the second end thereof is connected to the battery cell 51 of the adjacent battery module 50, the positive connector 581, or the negative connector 582.

[0135] like Figure 11 As shown, the first end of a first connecting cable 91 is connected to the positive or negative electrode of a cell 51, and the first end of a second connecting cable 92 is connected to the second end of the first connecting cable 91. The second end of the second connecting cable 92 is connected to the cell 51, the positive connector 581, or the negative connector 582 of an adjacent cell module 50. In other words, the second connecting cable 92 acts as a transition cable, preventing the connection of two cells 51 in adjacent cell modules 50 through a single connecting cable, or preventing the cell 51 from being directly connected to the positive connector 581 or the negative connector 582 through a single connecting cable. This would otherwise result in a single connecting cable being too long, increasing the risk of cable damage and reducing reliability. Furthermore, the first connecting cable of the present invention can be shorter (i.e., the cable connected to the cell 51 can be relatively short), increasing the stability of the connection to the cell 51 and avoiding the cumbersome situation of disassembling the cell module to replace the first connecting cable 91. The second connecting cable 92 is relatively easy to assemble and disassemble.

[0136] Furthermore, the second end of the first wiring 91 overlaps with the first end of the second wiring 92 . The second end of the first wiring 91 is formed with a third through hole, and the first end of the second wiring 92 is formed with a fourth through hole.

[0137] The new energy battery also includes a connecting post 931 and a connecting bolt 932. Connecting post 931 is attached to the top of the aluminum end plate 53, below the first and second cables 91 and 92. Connecting post 931 has a threaded hole formed along its height. Connecting bolt 932 passes through the third and fourth through holes and is threadedly engaged with the threaded hole in connecting post 931.

[0138] like Figure 10 and Figure 11 As shown, the rod of the connecting bolt 932 passes through the third and fourth through-holes of the overlapping first and second cables 91, 92, and is threadedly connected to the threaded hole of the connecting post 931 fixed to the aluminum end plate 53. This secures the second end of the first cable 91, reducing vibration, loosening, and pulling of the first cable 91, improving the stability of the connection between the first cable 91 and the battery cell 51, and preventing damage to the first cable 91. Furthermore, it ensures a stable connection between the first and second cables 91, 92, and prevents loosening of the connection and disconnection.

[0139] In some embodiments of the present invention, the new energy battery further includes a battery management system 70. The battery management system 70 connects the busbars 56 of each battery module.

[0140] like Figure 8 As shown, the battery management system 70 can better monitor and manage the operation of the battery cell module 50.

[0141] In some embodiments of the present invention, the new energy battery further includes a base plate 10. The base plate 10 is connected to and supports all the battery modules through a thermally conductive adhesive layer.

[0142] like Figure 8 As shown, the base plate 10 carries all the battery modules 50, providing stable support and protection for the battery modules 50. The base plate 10 is connected to the battery modules 50 via a thermally conductive adhesive, which ensures a stable connection between the battery modules 50 and the base plate 10. The thermally conductive adhesive can also reduce the contact thermal resistance between the base plate 10 and the battery modules 50, thereby improving the thermal conductivity of the base plate 10 to the battery modules 50.

[0143] The bottom plate 10 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0144] like Figures 12 to 15 As shown, a floor plate 10 for a battery of a heavy truck according to an embodiment of the present invention includes a base plate 12 and side end plates 11 .

[0145] First, the substrate 12 has a plurality of strip-shaped flow channels 123 formed inside the substrate 12 for accommodating coolant. The plurality of flow channels 123 are distributed along the width or length direction of the substrate 12. The upper surface of the substrate 12 is used to connect the battery module 50 through a thermally conductive adhesive layer.

[0146] As shown in Figures 12 to 15 the first surface of the substrate 12 is distributed with a plurality of strip-shaped flow channels 123 along the width direction of the substrate 12, and the liquid inlet hole 111 and the liquid outlet hole 112 on the side end plate 11 are respectively connected to two flow channels 123 at both ends of the width direction. The cooling liquid flows into the plurality of flow channels 123 from the liquid inlet hole 111, and then flows into the liquid outlet hole 112 from the plurality of flow channels 123, and finally flows out from the liquid outlet hole 112.

[0147] Next, the side end plate 11 is described. Two side end plates 11 are respectively connected to both sides of the substrate 12 in the length direction or the width direction and the end of the length direction of the flow channel, and the liquid inlet hole 111 and the liquid outlet hole 112 of one side end plate 11 away from the substrate 12 are formed to communicate with the flow channel 123.

[0148] As shown in Figure 12 the side end plate 11 connects both sides of the length direction of the substrate 12. The liquid inlet hole 111 and the liquid outlet hole 112 of one side end plate 11 communicate with the flow channel 123. The side end plate 11 can prevent the cooling liquid flowing through the substrate 12 from leaking.

[0149] A thermally conductive adhesive layer can be coated on the upper surface of the substrate 12. When in use, the battery cell module 50 is arranged on the thermally conductive adhesive layer, that is, the bottom plate 10 connects the battery cell module 50 through the thermally conductive adhesive layer to dissipate heat from the battery cell module 50. Compared with directly connecting the battery cell module 50 to the upper surface of the substrate 12, the thermally conductive adhesive layer can avoid contact gaps, reduce thermal resistance, improve heat conduction efficiency, and provide a certain buffer for the battery cell module 50 to reduce damage caused by bumps during driving of the heavy truck.

[0150] The above bottom plate 10 for the battery of the heavy truck, the substrate 12 is formed with a plurality of strip-shaped flow channels 123, and two side end plates 11 are connected to both ends of the length or width direction of the substrate 12, and the liquid inlet hole and the liquid outlet hole formed on one side end plate 11 communicate with the flow channel. The cooling liquid flows into the plurality of flow channels 123 from the liquid inlet hole 111, and then flows into the liquid outlet hole 112 from the plurality of flow channels 123, and finally flows out from the liquid outlet hole 112. The cooling liquid has high heat dissipation efficiency and can efficiently dissipate heat from the battery cell module 50. A thermally conductive adhesive layer is coated on the upper surface of the substrate 12. When in use, the battery cell module 50 is arranged on the thermally conductive adhesive layer, that is, the bottom plate 10 connects the battery cell module 50 through the thermally conductive adhesive layer to dissipate heat from the battery cell module 50. Compared with directly connecting the battery cell module 50 to the upper surface of the substrate 12, the thermally conductive adhesive layer can avoid contact gaps, reduce thermal resistance, improve heat conduction efficiency, and provide a certain buffer for the battery cell module 50 to reduce damage to the battery cell module 50.

[0151] Furthermore, the base plate 10 (the housing includes the base plate 10) is directly used to dissipate heat from the cell module 50. The base plate 10 is integrated with the liquid cooling system, resulting in a compact structure, which is beneficial for improving space utilization, reducing the number of parts, simplifying the assembly process, reducing costs, and achieving high heat dissipation efficiency, thereby increasing the energy density of the cell module 50. This avoids the existing situation where a cooling system is provided on the surface of the housing, where the cooling system first cools the housing and then cools the cell module 50 through the housing, resulting in low heat dissipation efficiency.

[0152] The specific distribution of the flow channels 123 on the substrate 12 may be as follows:

[0153] Structure 1

[0154] The first ends and second ends of two adjacent flow channels 123 are connected in sequence to form an "S"-shaped channel. The liquid inlet 111 and the liquid outlet 112 are respectively connected to the two flow channels 123 at both ends in the width direction of the substrate 12.

[0155] like Figure 13 As shown (arrows indicate the direction of coolant flow), the first surface of substrate 12 is formed with ten flow channels 123 distributed along the width of substrate 12. These ten flow channels 123 are connected end-to-end to form an S-shaped channel. Coolant flows from inlet 111 through each flow channel 123 in an S-shaped direction, and finally flows out of outlet 112. This substrate 12 has a simple structure, smooth coolant flow, and good heat dissipation.

[0156] Structure 2

[0157] The battery cell module 50 includes multiple groups spaced apart along the width direction of the substrate 12, and multiple flow channels 123 are distributed along the width direction of the substrate 12. The flow channels 123 also include multiple groups. The flow channels 123 in each group are interconnected, and the flow channels 123 in different groups are not connected. The multiple groups of flow channels 123 correspond one-to-one to the multiple groups of battery cell modules 50, and each group of flow channels 123 is connected to the liquid inlet hole 111 and the liquid outlet hole 112.

[0158] like Figure 1 As shown, the battery cell module 50 includes three groups distributed along the width direction of the substrate 12. Figure 14 As shown (the arrow indicates the direction of coolant flow), the flow channels 123 are correspondingly divided into three groups. The first group of flow channels 123 includes four interconnected flow channels 123, the second group of flow channels 123 includes three interconnected flow channels 123, and the third group of flow channels 123 includes three interconnected flow channels 123. The liquid inlet 111 is connected to the three groups of flow channels 123, and the liquid outlet 112 is also connected to the three groups of flow channels 123.

[0159] The cooling liquid flows into the three groups of flow channels 123 synchronously, and the three groups of flow channels 123 are independently cooled. If one group of flow channels 123 is abnormal (blocked, leaked, etc.), it does not affect the other groups of flow channels 123, which can increase stability. Moreover, the substrate 12 of this structure can uniformly cool each group of battery cell modules 50, avoiding the situation that the cooling liquid in the substrate 12 of the embodiment shown in the figure gradually increases in temperature when flowing through each flow channel 123 one by one, and gradually reduces the cooling of each group of battery cell modules 50 downstream of the cooling liquid. Figure 1

[0160] It should be noted that the above is an optional example, and the number of groups of battery cell modules 50 and the number of flow channels 123 in each group of flow channels 123 are not limited here.

[0161] Further, the inside of the side end plate 11 is formed with a first connecting channel 113 connected to the liquid inlet hole 111, and the liquid inlet end of each group of flow channels 123 is connected to the first connecting channel 113. The inside of the side end plate 11 is formed with a second connecting channel 114 connected to the liquid outlet hole 112, and the liquid outlet end of each group of flow channels 123 is connected to the second connecting channel 114.

[0162] As shown in the figure, the first connecting channel 113 connects each group of flow channels 123, and the cooling liquid flowing into the liquid inlet hole 111 can smoothly flow into each group of flow channels 123. The second connecting channel 114 connects each group of flow channels 123, and the cooling liquid of each group of flow channels 123 can smoothly flow into the liquid outlet hole 112. The substrate 12 of this structure is simple to process and has high production efficiency. Figure 14 Further, in each group of flow channels 123, the first end and the second end of each two adjacent flow channels 123 are sequentially connected to form an "S" shaped channel.

[0163] As shown in the figure, the flow channels 123 in each group of flow channels 123 are connected end to end to form an "S" shaped channel, and the cooling liquid flows through each flow channel 123 one by one, so that the cooling liquid flows smoothly.

[0164] Figure 14 Structure Three

[0165] A plurality of flow channels 123 are distributed along the width direction of the substrate 12, and the width of the flow channels 123 is set based on the heat generation of the battery cell modules 50.

[0166] As shown in the figure, the flow channels 123 in each group of flow channels 123 are connected end to end to form an "S" shaped channel, and the cooling liquid flows through each flow channel 123 one by one, so that the cooling liquid flows smoothly.

[0167] As shown in the figure, the flow channels 123 in each group of flow channels 123 are connected end to end to form an "S" shaped channel, and the cooling liquid flows through each flow channel 123 one by one, so that the cooling liquid flows smoothly. Figure 15 ​​As shown, the change in the width of the flow channel 123 corresponds to a change in the cross-sectional area of ​​the coolant flow (the larger the width, the larger the cross-sectional area), that is, a change in the flow rate of the coolant (the larger the cross-sectional area, the lower the flow rate), and is set according to the heat generation of each area of ​​the battery cell module 50. That is, the area with high heat generation of the battery cell module 50, the larger the width of the corresponding flow channel 123, the better the heat dissipation of the area with high heat generation of the battery cell module 50 is concentrated, which can ensure that the battery cell modules 50 at the front and rear ends can be effectively cooled, thereby improving the uniformity of heat dissipation.

[0168] In some embodiments of the present invention, the base plate 12 is an aluminum extrusion part, and the base plate 12 and the side end plate 11 are connected by stir friction welding.

[0169] Aluminum profiles have high thermal conductivity, enabling the substrate 12 to efficiently dissipate heat from the battery module. The substrate 12 is an extruded part, that is, formed through an extrusion process, which has high production efficiency, meets the needs of large-scale operations, and can reduce costs.

[0170] The base plate 12 is connected to the side end plate 11 by stir friction welding, which can improve the connection efficiency and have better stability compared to ordinary electric welding, so that the bottom plate 10 has higher sealing performance and avoids coolant leakage.

[0171] In some embodiments of the present invention, the bottom plate 10 further includes a liquid inlet connector 13 and a liquid outlet connector 14. The liquid inlet connector 13 is connected to the liquid inlet hole 111. The liquid outlet connector 14 is connected to the liquid outlet hole 112.

[0172] The liquid inlet connector 13 can be easily connected to the liquid inlet pipe, so that the coolant in the liquid inlet pipe can flow smoothly into the liquid inlet hole 111 without leakage. The liquid outlet connector 14 can be easily connected to the liquid outlet pipe, so that the coolant flowing out of the liquid outlet can flow smoothly into the liquid outlet pipe without leakage.

[0173] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A new energy battery for heavy trucks, characterized in that: The new energy battery comprises a battery cell module (50), a battery management system (70) and a housing, wherein the housing comprises: A bottom plate (10), the middle portion of the upper surface of the bottom plate (10) being connected to and carrying the battery core module (50) via a thermally conductive adhesive layer; a support member, the support member being arranged on the upper surface of the base plate (10) and extending along the width direction of the base plate (10), the support member being located at the front side of the battery cell module (50), and the support member being connected to a battery management system (70); A box cover (20), the box cover (20) is formed as a trough body with a first opening at the bottom, the box cover (20) accommodates the battery module (50), the battery management system (70) and the support member, the box cover (20) is provided with an outer flange (22) at the edge of the first opening, the bottom of the outer flange (22) is embedded in a bushing, and a first fastener passes through the outer flange (22) and the bushing to be fastened to the bottom plate (10), and a second opening (21) is formed on the side wall of the front side of the box cover (20); An end cover (30) is connected to the front side of the box cover (20) via a second fastener to close the second opening (21).

2. The new energy battery for heavy trucks according to claim 1, characterized in that: The support member comprises: a first supporting step (62), the first supporting step (62) being connected to the upper surface of the bottom plate (10); A support plate (61), the support plate (61) is connected to the upper surface of the first support step (62), the side of the support plate (61) is connected to the battery management system (70), and the second fastener passes through the end cover (30) and the box cover (20) and is fastened to the support plate (61).

3. The new energy battery for heavy trucks according to claim 1, characterized in that: The first fastener is a bolt, a first threaded hole is formed on the base plate (10), and the first fastener passes through the outer flange (22) and the bushing and is threadedly connected to the first threaded hole.

4. The new energy battery for heavy trucks according to claim 3, characterized in that: The housing further comprises: A first sealing ring (81) is provided between the outer flange (22) and the base plate (10); the first fastener passes through the outer flange (22), the bushing and the first sealing ring (81) and is threadedly connected to the first threaded hole.

5. The new energy battery for heavy trucks according to claim 1, characterized in that: The battery core module (50) includes: A plurality of battery cells (51), wherein the plurality of battery cells (51) are arranged spaced apart along a first direction; Two aluminum end plates (53), the two aluminum end plates (53) being respectively located on the outside of a first battery cell (51) and the outside of a last battery cell (51) among the plurality of battery cells (51) arranged along the first direction, the outside of the battery cell (51) being the side of the battery cell (51) away from the battery cell (51) adjacent thereto; A plurality of first flame-retardant plates (52), wherein the plurality of first flame-retardant plates (52) are respectively inserted into the gaps between two adjacent battery cells (51), and into the gaps between the aluminum end plates (53) and the battery cells (51); A cable tie (55), the cable tie (55) surrounds and bundles the plurality of battery cells (51), the plurality of first flame retardant plates (52), and the two aluminum end plates (53); A busbar (56), the busbar (56) being arranged on top of the plurality of battery cells (51) and electrically connected to all of the battery cells (51); A positive connector (581), the positive connector (581) being connected to the positive electrode of the battery cell (51); A negative electrode connector (582), the negative electrode connector (582) is connected to the negative electrode of the battery cell (51).

6. The new energy battery for heavy trucks according to claim 5, characterized in that: The battery core module (50) further includes: An insulating plate (54) is provided, wherein the insulating plate (54) covers the top of the busbar (56).

7. The new energy battery for heavy trucks according to claim 5, characterized in that: The new energy battery includes: A plurality of battery cell modules (50), wherein the plurality of battery cell modules (50) are spaced apart and arranged along a second direction, and a predetermined gap is provided between adjacent battery cell modules (50), wherein the second direction is a horizontal direction perpendicular to the first direction, and the battery cell module (50) is the battery cell module (50) according to any one of claims 1 to 4; A connecting cable is provided, wherein the connecting cable connects a plurality of the battery modules (50) in series and connects the positive connector (581) and the negative connector (582); the battery cell (51) is connected to the positive connector (581) through the connecting cable and is connected to the negative connector (582) through the connecting cable.

8. The new energy battery for heavy trucks according to claim 5, characterized in that: The new energy battery further includes: A second supporting step (63) is provided between the bottom plate (10) and the aluminum end plate (53).

9. The new energy battery for heavy trucks according to claim 1, characterized in that: The bottom plate (10) comprises: A substrate (12), wherein a plurality of strip-shaped flow channels (123) capable of accommodating a cooling liquid are formed inside the substrate (12), the plurality of flow channels (123) being distributed along the width or length direction of the substrate (12), and the upper surface of the substrate (12) being used for connecting the electric core module (50) via a thermally conductive adhesive layer; Two side end plates (11), the two side end plates (11) are respectively connected to both sides of the substrate (12) in the length direction or the width direction and connected to the ends of the flow channel in the length direction, and a liquid inlet hole (111) and a liquid outlet hole (112) communicating with the flow channel (123) are formed on a side of one of the side end plates (11) away from the substrate (12).

10. The new energy battery for heavy trucks according to claim 9, characterized in that: The battery cell module (50) includes a plurality of groups spaced apart along the width direction of the substrate (12), a plurality of the flow channels (123) are distributed along the width direction of the substrate (12), and the flow channels (123) also include a plurality of groups. The flow channels (123) in each group are interconnected, and the flow channels (123) in different groups are not connected. The plurality of groups of the flow channels (123) correspond to the plurality of groups of the battery cell modules (50) in a one-to-one manner, and each group of the flow channels (123) is connected to the liquid inlet (111) and the liquid outlet (112).

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